Advanced Motor Protection for Variable Speed Operation - Siemens · Proper use of Siemens products....
Transcript of Advanced Motor Protection for Variable Speed Operation - Siemens · Proper use of Siemens products....
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A5E46373908
Function Manual
Advanced Motor Protection for Variable Speed Operation
Manual
AAA5E46373908A
Security Information 1
Safety notes 2
Introduction 3Advanced Motor Protection Parameters 4
RTD Terminal Connections 5Advanced Motor Protection and RTD Protection Functions
6
Alarms, Faults, and Logging Messages 7NXGpro AMP Alarms/Faults, Protection Variables, and RTD Status Screens
8
Troubleshooting 9
Spare Parts Data 10
Appendix A
Service and support 11
ESD guidelines A
Legal informationWarning notice system
This manual contains notices you have to observe in order to ensure your personal safety, as well as to prevent damage to property. The notices referring to your personal safety are highlighted in the manual by a safety alert symbol, notices referring only to property damage have no safety alert symbol. These notices shown below are graded according to the degree of danger.
DANGERindicates that death or severe personal injury will result if proper precautions are not taken.
WARNINGindicates that death or severe personal injury may result if proper precautions are not taken.
CAUTIONindicates that minor personal injury can result if proper precautions are not taken.
NOTICEindicates that property damage can result if proper precautions are not taken.If more than one degree of danger is present, the warning notice representing the highest degree of danger will be used. A notice warning of injury to persons with a safety alert symbol may also include a warning relating to property damage.
Qualified PersonnelThe product/system described in this documentation may be operated only by personnel qualified for the specific task in accordance with the relevant documentation, in particular its warning notices and safety instructions. Qualified personnel are those who, based on their training and experience, are capable of identifying risks and avoiding potential hazards when working with these products/systems.
Proper use of Siemens productsNote the following:
WARNINGSiemens products may only be used for the applications described in the catalog and in the relevant technical documentation. If products and components from other manufacturers are used, these must be recommended or approved by Siemens. Proper transport, storage, installation, assembly, commissioning, operation and maintenance are required to ensure that the products operate safely and without any problems. The permissible ambient conditions must be complied with. The information in the relevant documentation must be observed.
TrademarksAll names identified by ® are registered trademarks of Siemens AG. The remaining trademarks in this publication may be trademarks whose use by third parties for their own purposes could violate the rights of the owner.
Disclaimer of LiabilityWe have reviewed the contents of this publication to ensure consistency with the hardware and software described. Since variance cannot be precluded entirely, we cannot guarantee full consistency. However, the information in this publication is reviewed regularly and any necessary corrections are included in subsequent editions.
Siemens AGGlobal Services Information Technology80200 MÜNCHENGERMANY
A5E46373908AⓅ 06/2019 Subject to change
Copyright © Siemens AG 2019.All rights reserved
Table of contents
1 Security Information......................................................................................................................................9
1.1 Security information .................................................................................................................9
2 Safety notes................................................................................................................................................11
2.1 General Safety Information ....................................................................................................11
2.2 Observing the Five Safety Rules............................................................................................12
2.3 Safety Information and Warnings...........................................................................................13
3 Introduction.................................................................................................................................................15
3.1 Background ...........................................................................................................................15
4 Advanced Motor Protection Parameters.....................................................................................................17
4.1 Standard Protections Block Diagram .....................................................................................17
4.2 Introduction ............................................................................................................................23
4.3 Protection Function Enable Types .........................................................................................26
5 RTD Terminal Connections ........................................................................................................................27
5.1 Installation External Wiring.....................................................................................................27
6 Advanced Motor Protection and RTD Protection Functions .......................................................................29
6.1 Top Level Menu and Submenus ............................................................................................29
6.2 Device 12 - Fixed Pickup Overspeed.....................................................................................31
6.3 Device 12 - Variable Pickup Overspeed ................................................................................33
6.4 Device 14 - Fixed Pickup Underspeed...................................................................................37
6.5 Device 14 - Variable Pickup Underspeed ..............................................................................39
6.6 Device 37 - Fixed Pickup Undercurrent .................................................................................43
6.7 Device 37 - Variable Pickup Undercurrent .............................................................................45
6.8 Device 37P - Fixed Underpower Relay .................................................................................48
6.9 Device 38 - Fixed Bearing Temperature Protective Device ...................................................50
6.10 Device 39 - Mechanical Condition Monitor - Fixed Pickup Torque Pulsation.........................51
6.11 Device 46_2 - Phase-Balance Current - Fixed Pickup Negative Sequence Overcurrent Delay ......................................................................................................................................54
6.12 Device 48 - Incomplete Sequence Relay Device - Maximum Start Time...............................56
6.13 Device 48 - Incomplete Sequence Relay Device - Maximum Stop Time...............................57
6.14 Device 49T - Machine Thermal Model - Fixed Parameter Thermal Overload........................58
6.15 Device 49T - Machine Thermal Model - Variable Parameter Thermal Overload ...................63
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6.16 Device 49RTD - Machine Thermal Overload - Fixed Pickup RTD Protection........................70
6.17 Device 50 - Fixed Pickup Instantaneous Overcurrent Device ...............................................80
6.18 Device 51 - Fixed Inverse Time Overcurrent .........................................................................826.18.1 Device 51 - Fixed Inverse Time Overcurrent .........................................................................826.18.2 Function 51 IEEE Pickup and Reset .....................................................................................866.18.3 Function 51 ANSI Pickup and Reset .....................................................................................936.18.4 Function 51 IAC Pickup and Reset .....................................................................................1026.18.5 Function 51 IEC Pickup and Reset ......................................................................................1116.18.6 Function 51 I2T Pickup and Reset ......................................................................................1196.18.7 Function 51 I4T Pickup and Reset ......................................................................................121
6.19 Device 55 - Fixed Pickup Maximum Power Factor ..............................................................124
6.20 Device 55 - Power Factor Relay Device (Fixed minimum power factor)..............................126
6.21 Device 59G - Fixed Pickup Instantaneous Zero Sequence Overvoltage .............................128
6.22 Device 59G - Fixed Pickup Definite Minimum Time Zero Sequence Overvoltage...............130
6.23 Device 66 - Notching or Jogging Device - Starts per Hour ..................................................133
6.24 Device 66 - Notching or Jogging Device - Cold Starts per Hour ..........................................134
6.25 Device 66 - Notching or Jogging Device - Hot Starts per Hour............................................135
6.26 Device 66 - Notching or Jogging Device - Maximum Thermal Capacity Used to Start ........136
6.27 Device 81 - Fixed Pickup Overfrequency.............................................................................137
6.28 Device 81 - Variable Pickup Overfrequency ........................................................................139
6.29 Device 81 - Fixed Pickup Underfrequency...........................................................................143
6.30 Device 81 - Variable Pickup Underfrequency ......................................................................145
6.31 Device 81 - Fixed Pickup High Frequency Rate of Change.................................................149
6.32 Changing RTD Type ............................................................................................................1516.32.1 Changing RTD Type ............................................................................................................151
7 Alarms, Faults, and Logging Messages ...................................................................................................153
7.1 Alarms, Faults, and Logging Messages ...............................................................................153
8 NXGpro AMP Alarms/Faults, Protection Variables, and RTD Status Screens........................................159
8.1 Viewing Protection Variables ...............................................................................................1598.1.1 AMP Data Screen ................................................................................................................1608.1.2 AMP Alarms / Faults ............................................................................................................1618.1.3 RTD Status Screen ..............................................................................................................164
9 Troubleshooting........................................................................................................................................165
9.1 Troubleshooting ...................................................................................................................165
10 Spare Parts Data .....................................................................................................................................167
10.1 AMP Replaceable Spart Parts List.......................................................................................167
A Appendix...................................................................................................................................................169
A.1 IEEE Device Numbers and Functions..................................................................................169
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A.2 Abbreviations .......................................................................................................................171
11 Service and support..................................................................................................................................173
11.1 Field Service Operation........................................................................................................173
A ESD guidelines .........................................................................................................................................175
A.1 ESD-sensitive Components .................................................................................................175
Index.........................................................................................................................................................179
Tables
Table 4-1 Pickup Level Settings for Variable Undercurrent Protection Example ........................................20Table 4-2 Example of per-unit and engineering unit quantities ...................................................................25Table 6-1 Advanced Motor Protection Menu - Fixed Pickup Over Speed (ID 7181) ...................................31Table 6-2 Advanced Motor Protection Menu - Variable Pickup Over Speed (ID 7189)...............................33Table 6-3 Advanced Motor Protection Menu - Fixed Pickup Underspeed Device (ID 7217).......................37Table 6-4 Advanced Motor Protection Menu - Variable Pickup Underspeed (ID 7226) ..............................39Table 6-5 Advanced Motor Protection Menu - Fixed Pickup Undercurrent Device (ID 7256) .....................43Table 6-6 Advanced Motor Protection Menu - Variable Pickup Undercurrent Device (ID 7266).................45Table 6-7 Advanced Motor Protection Menu - Fixed Pickup Underpower Relay (ID 7297) ........................48Table 6-8 Advanced Motor Protection Menu - Mechanical Condition Monitor - Fixed Pickup Torque
Pulsation (ID 7306)......................................................................................................................51Table 6-9 Advanced Motor Protection Menu - Phase Balance Current - Fixed Negative Sequence
Over Current (ID 7316)................................................................................................................54Table 6-10 Advanced Motor Protection Menu - Incomplete Sequence - Maximum Start Time (ID 7325)......56Table 6-11 Advanced Motor Protection Menu - Incomplete Sequence - Maximum Stop Time (ID 7330)......57Table 6-12 Advanced Motor Protection Menu - Machine Thermal Model - Fixed Parameter Thermal
Overload (ID 7335)......................................................................................................................58Table 6-13 Advanced Motor Protection Menu - Machine Thermal Model - Variable Thermal Overload
(ID 7352) .....................................................................................................................................63Table 6-14 Values of the k-Factor Settings ...................................................................................................69Table 6-15 RTD Protection Menu - Machine Thermal Overload - Fixed Pickup RTD Protection (ID 7429)......70Table 6-16 Advanced Motor Protection Menu - Fixed Pickup Instantaneous Overcurrent (ID 7515) ...........80Table 6-17 Advanced Motor Protection Menu - Fixed Pickup Inverse Time Overcurrent (ID 7533) .............82Table 6-18 IEEE Curve Data Table ...............................................................................................................87Table 6-19 ANSI Curve Data Table...............................................................................................................94Table 6-20 IAC Curve Data Table ...............................................................................................................103Table 6-21 Advanced Motor Protection Menu - Fixed Pickup Maximum Power Factor (ID 7573) ..............124Table 6-22 Advanced Motor Protection Menu - Fixed Pickup Minimum Power Factor (ID 7582) ...............126Table 6-23 Advanced Motor Protection Menu - Fixed PickupInstantaneous Zero Sequence
Overvoltage (ID 7563) ...............................................................................................................128Table 6-24 Advanced Motor Protection Menu - Fixed Pickup Instantaneous Overcurrent (ID 7524) .........130
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Table 6-25 Advanced Motor Protection Menu - Starts per Hour (ID 7590) ................................................133Table 6-26 Advanced Motor Protection Menu - Notching or Jogging - Cold Starts per Hour (ID 7593).....134Table 6-27 Advanced Motor Protection Menu - Hot Starts per Hour (ID 7598)..........................................135Table 6-28 Motor Protection Menu - Maximum Thermal Capacity Used to Start (ID 7603) .......................136Table 6-29 Advanced Motor Protection Menu - Fixed Pickup Overfrequency (ID 7606).............................137Table 6-30 Advanced Motor Protection Menu - Variable Pickup Overfrequency (ID 7615) ........................139Table 6-31 Advanced Motor Protection Menu - Fixed Pickup Underfrequency (ID 7645)...........................143Table 6-32 Advanced Motor Protection Menu - Variable Pickup Underfrequency (ID 7654) .....................145Table 6-33 Advanced Motor Protection Menu - Fixed Pickup High Frequency Rate of Change (ID 7684)....149Table 7-1 Advanced Motor Protection Function Event Log Table .............................................................153Table 7-2 RTD Protection Function Event Log Table................................................................................156
Figures
Figure 4-1 Generalized Protection Function Block Diagram.........................................................................17Figure 4-2 Various Pickup and Dropout Time Delay Counter Examples of Operation .................................19Figure 4-3 Variable Pickup Under Current Graph.........................................................................................21Figure 4-4 AMP Hardware Block Diagram....................................................................................................24Figure 5-1 RTD Termination Diagram (for internal and external wiring).......................................................27Figure 5-2 Internal and External Wiring for Unused RTD Inputs ..................................................................28Figure 6-1 Overspeed Protection Diagram...................................................................................................32Figure 6-2 Overspeed Protection Diagram...................................................................................................36Figure 6-3 Underspeed Protection Diagram.................................................................................................38Figure 6-4 Underspeed Protection Diagram.................................................................................................42Figure 6-5 UnderCurrent Protection .............................................................................................................44Figure 6-6 Undercurrent Protection Diagram................................................................................................47Figure 6-7 Underpower Protection Diagram.................................................................................................49Figure 6-8 Per Unit Torque...........................................................................................................................52Figure 6-9 Mean of Torque Dataset .............................................................................................................52Figure 6-10 RMS Value of Pulsating Torque..................................................................................................52Figure 6-11 Torque Pulsation Diagram...........................................................................................................53Figure 6-12 Negative Sequence Current Diagram .........................................................................................55Figure 6-13 Thermal Capacity used as determined by Stator Temperature...................................................61Figure 6-14 Example of Variable Parameter Thermal Overload Protection k-Factor ....................................69Figure 6-15 Overcurrent Protection Diagram..................................................................................................81Figure 6-16 User Programmed OverCurrent Trip Curve Example .................................................................85Figure 6-17 IEEE Pickup Curve Equation.......................................................................................................87Figure 6-18 IEEE Reset Curve Equation ........................................................................................................87Figure 6-19 IEEE Extremely Inverse Pickup Time..........................................................................................88
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Figure 6-20 IEEE Extremely Inverse Reset Time...........................................................................................89Figure 6-21 IEEE Very Inverse Pickup Time ..................................................................................................90Figure 6-22 IEEE Very Inverse Reset Time....................................................................................................91Figure 6-23 IEEE Moderately Inverse Pickup Time........................................................................................92Figure 6-24 IEEE Moderately Inverse Reset Time .........................................................................................93Figure 6-25 ANSI Pickup Curve Equation ......................................................................................................94Figure 6-26 ANSI Reset Curve Equation........................................................................................................94Figure 6-27 ANSI Extremely Inverse Pickup Time .........................................................................................95Figure 6-28 ANSI Extremely Inverse Reset Time...........................................................................................96Figure 6-29 ANSI Very Inverse Pickup Time..................................................................................................97Figure 6-30 ANSI Very Inverse Reset Time ...................................................................................................98Figure 6-31 ANSI Inverse Pickup Time ..........................................................................................................99Figure 6-32 ANSI Inverse Reset Time..........................................................................................................100Figure 6-33 ANSI Moderately Inverse Pickup Time......................................................................................101Figure 6-34 ANSI Moderately Inverse Reset Time.......................................................................................102Figure 6-35 IAC pickup-curve equation ........................................................................................................103Figure 6-36 IAC Reset Curve Equation ........................................................................................................103Figure 6-37 IAC Extremely Inverse Pickup Time..........................................................................................104Figure 6-38 IAC Extremely Inverse Reset Time ...........................................................................................105Figure 6-39 IAC Very Inverse Pickup Time ..................................................................................................106Figure 6-40 IAC Very Inverse Reset Time....................................................................................................107Figure 6-41 IAC Inverse Pickup Time...........................................................................................................108Figure 6-42 IAC Inverse Reset Time ............................................................................................................109Figure 6-43 IAC Short Inverse Pickup Time .................................................................................................110Figure 6-44 IAC Short Inverse Reset Time...................................................................................................111Figure 6-45 IEC Pickup Curve Equation.......................................................................................................111Figure 6-46 IEC Reset Curve Equation ........................................................................................................111Figure 6-47 IEC Inverse Pickup Time...........................................................................................................112Figure 6-48 IEC Inverse Reset Time ............................................................................................................113Figure 6-49 IEC Extremely Inverse Pickup Time..........................................................................................114Figure 6-50 IEC Extremely Inverse Reset Time ...........................................................................................115Figure 6-51 IEC Short Inverse Pickup Time .................................................................................................116Figure 6-52 IEC Short Inverse Reset Time...................................................................................................117Figure 6-53 IEC Very Inverse Pickup Time ..................................................................................................118Figure 6-54 IEC Very Inverse Reset Time....................................................................................................119Figure 6-55 I2t Pickup Time Equation ..........................................................................................................119Figure 6-56 I2t Reset Time Equation............................................................................................................120Figure 6-57 I2t Inverse Pickup Time.............................................................................................................120Figure 6-58 I2t Inverse Reset Time ..............................................................................................................121
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Figure 6-59 I4t Pickup Time equation...........................................................................................................121Figure 6-60 I4t Reset Time equation ............................................................................................................122Figure 6-61 I4t Inverse Pickup......................................................................................................................122Figure 6-62 I4t Inverse Reset .......................................................................................................................123Figure 6-63 OverPF Protection Diagram ......................................................................................................125Figure 6-64 UnderPF Protection Diagram ....................................................................................................127Figure 6-65 OverZeroSeqVoltage Protection Diagram.................................................................................129Figure 6-66 OverZeroSeqVoltage Protection Diagram.................................................................................131Figure 6-67 OverFrequency Protection Diagram..........................................................................................138Figure 6-68 Overfrequency Protection Diagram...........................................................................................142Figure 6-69 UnderFrequency Protection Diagram........................................................................................144Figure 6-70 Underfrequency Protection Diagram.........................................................................................148Figure 6-71 OverFrequencyRate Protection.................................................................................................150Figure 8-1 Display Parameters ...................................................................................................................159Figure 8-2 AMP Data Screen......................................................................................................................161Figure 8-3 AMP Alarms / Faults Screen .....................................................................................................162Figure 8-4 Output Data IDs ........................................................................................................................163Figure 8-5 RTD Status Screen ...................................................................................................................164Figure A-1 ESD Protective Measures .........................................................................................................177
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Advanced Motor Protection for Variable Speed Operation8 Manual, AA, A5E46373908A
Security Information 11.1 Security information
Siemens provides products and solutions with industrial security functions that support the secure operation of plants, systems, machines and networks.
In order to protect plants, systems, machines and networks against cyber threats, it is necessary to implement – and continuously maintain – a holistic, state-of-the-art industrial security concept. Siemens’ products and solutions constitute one element of such a concept.
Customers are responsible for preventing unauthorized access to their plants, systems, machines and networks. Such systems, machines and components should only be connected to an enterprise network or the internet if and to the extent such a connection is necessary and only when appropriate security measures (e.g. firewalls and/or network segmentation) are in place.
For additional information on industrial security measures that may be implemented, please visit https://www.siemens.com/industrialsecurity.
Siemens’ products and solutions undergo continuous development to make them more secure. Siemens strongly recommends that product updates are applied as soon as they are available and that the latest product versions are used. Use of product versions that are no longer supported, and failure to apply the latest updates may increase customer’s exposure to cyber threats.
To stay informed about product updates, subscribe to the Siemens Industrial Security RSS Feed under https://www.siemens.com/industrialsecurity.
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 9
Security Information1.1 Security information
Advanced Motor Protection for Variable Speed Operation10 Manual, AA, A5E46373908A
Safety notes 22.1 General Safety Information
Proper Use SINAMICS Perfect Harmony™ GH180 medium voltage drives must always be installed in closed electrical operating areas. The drive is connected to the industrial network via a circuit-breaker or contactor that is electrically connected to the VFD control to enable the drive protection features.
The specific transport conditions must be observed when the equipment is transported. The equipment shall be assembled/installed and the separate cabinet units connected properly by cable and/or busbar in accordance with the assembly/installation instructions. The relevant instructions regarding correct storage, EMC-compliant installation, cabling, shielding and grounding and an adequate auxiliary power supply must be strictly observed. Fault-free operation is also dependent on careful operation and maintenance.
The power sections are designed for variable-speed drives use with synchronous and asynchronous motors. Operating modes, overload conditions, load cycles, and ambient conditions different to those described in this document are allowed only by special arrangement with the manufacturer.
Commissioning should only be carried out by trained service personnel in accordance with the commissioning instructions.
System components such as circuit-breaker, transformer, cables, cooling unit, motor, speed sensors, etc., must be matched to VFD operation. System configuration may only be carried out by an experienced system integrator.
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2.2 Observing the Five Safety RulesThere are five safety rules that must always be observed to assure not only personal safety, but to prevent material damage as well. Always obey safety-related labels located on the product itself and always read and understand each safety precaution prior to operating or working on the drive.
The five safety rules:
1. Disconnect the power applied to the system.
2. Protect against reapplication of power.
3. Make sure that the equipment is de-energized.
4. Apply grounding (earthing) means.
5. Cover or enclose adjacent components to secure all forms of hazardous energy.
DANGER
Danger Due to High Voltages
High voltages cause death or serious injury if the safety instructions are not observed or if the equipment is handled incorrectly.
Potentially fatal voltages occur when this equipment is in operation which can remain present even after the VFD is switched off.
Ensure that only qualified and trained personnel carry out work on the equipment.
Follow the five safety rules during each stage of the work.
Safety notes2.2 Observing the Five Safety Rules
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2.3 Safety Information and Warnings
DANGER
Hazardous Voltage! ● Always follow the proper lock-out/tag-out procedures before beginning any maintenance
or troubleshooting work on the VFD. ● Always follow standard safety precautions and local codes during installation of external
wiring. The installation must follow wiring practices and insulation systems as specified in IEC 61800-5-1.
● Hazardous voltages may still exist within the VFD cabinets even when the disconnect switch is open (off) and the supply power is shut off.
● Only qualified individuals should install, operate, troubleshoot, and maintain this VFD. A qualified individual is "a person, who is familiar with the construction and operation of the equipment and the hazards involved."
● Always work with one hand, wear electrical safety gloves, wear insulated electrical hazard rated safety shoes, and safety goggles. Also, always work with another person present.
● Always use extreme caution when handling or measuring components that are inside the enclosure. Be careful to prevent meter leads from shorting together or from touching other terminals.
● Use only instrumentation (e.g., meters, oscilloscopes, etc.) intended for high voltage measurements (that is, isolation is provided inside the instrument, not provided by isolating the chassis ground of the instrument).
● Never assume that switching off the input disconnector will remove all voltage from internal components. Voltage is still present on the terminals of the input disconnector. Also, there may be voltages present that are applied from other external sources.
● Never touch anything within the VFD cabinets until verifying that it is neither thermally hot nor electrically alive.
● Never remove safety shields (marked with a HIGH VOLTAGE sign) or attempt to measure points beneath the shields.
● Never operate the VFD with cabinet doors open. The only exception is the control cabinet.● Never connect any grounded (i.e., non-isolated) meters or oscilloscopes to the system.● Never connect or disconnect any meters, wiring, or printed circuit boards while the VFD is
energized.● Never defeat the instrument’s grounding.● When a system is configured with VFD bypass switchgear (e.g. contactors between line
and motor, and VFD and motor), these switches should be interlocked so that the line voltage is never applied to the VFD output if the medium voltage input is removed from the VFD.
● When a system is configured with VFD pre-charge, medium voltage is present on the primary side of the input transformer and upstream device even though the MV contactor is not closed.
Safety notes2.3 Safety Information and Warnings
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WARNING
Potential Arc Hazard● Arcing can result in damage to property, serious injury and even death. ● The equipment has not been tested and rated for arc flash protection.● Avoiding arc hazard risks is dependent upon proper installation and maintenance.● Incorrectly applied equipment, incorrectly selected, connected or unconnected cables, or
the presence of foreign materials can cause arcing in the equipment.● Follow all applicable precautionary rules and guidelines as used in working with medium
voltage equipment.● The equipment may be used only:
– for the applications defined as suitable in the technical description.– in combination with equipment and components supplied by other manufacturers which
have been approved and recommended by Siemens.● Always follow the facility / installation site rules / guidelines for Personal Protectiive
Equipment (PPE) based on the Arc Flash study of that facility.
Additional safety precautions and warnings appear throughout this manual. These important messages should be followed to reduce the risk of personal injury or equipment damage.
WARNING
Obey Rules to Avoid Risk of Death● Always comply with local codes and requirements if disposal of failed components is
necessary.● Always ensure the use of an even and flat truck bed to transport the VFD system. Before
unloading, be sure that the concrete pad is level for storage and permanent positioning.● Always confirm proper tonnage ratings of cranes, cables, and hooks when lifting the VFD
system. Dropping the cabinet or lowering it too quickly could damage the unit.● Never disconnect control power while medium voltage is energized. This could cause
severe system overheating and/or damage.● Never store flammable material in, on, or near the drive enclosure. This includes
equipment drawings and manuals.● Never use fork trucks to lift cabinets that are not equipped with lifting tubes. Be sure that
the fork truck tines fit the lifting tubes properly and are the appropriate length.
Safety notes2.3 Safety Information and Warnings
Advanced Motor Protection for Variable Speed Operation14 Manual, AA, A5E46373908A
Introduction 33.1 Background
Unlike other motor protection management relays, the SINAMICS Advanced Motor Protection (AMP) is fully integrated into the drive itself, requiring no installation or mounting. Protection variables and RTD data used by the AMP are tested to ensure that the AMP is functioning properly and is ready for parameter setting before leaving the factory. To assure motor and process protection, it is necessary to define protection settings in such a way as to prevent motor and process damage, which can occur in various manners and conditions.
Today industrial equipment is designed to be operated for 20 years or longer. Medium voltage motors are exposed to environmental and mechanical stresses that, over time, could lead to motor degradation and malfunction. The monitoring and protection of such medium voltage motors is an essential element in the overall industrial process protection. These protection schemes are needed to avoid financial losses caused by unexpected process downtown.
Medium voltage motors are operated either directly on line (DOL) or through variable frequency drives (VFDs). Thus, they require protection from the following conditions:
● input line events
● high temperatures, insulation and bearing failures
● conditions created by a change in a load
– overload
– underload
– imbalance
– jamming
The advanced motor protection algorithms described in this manual can be used to protect systems from such events. In addition, some features can also be configured to detect and protect against undesirable process conditions.
The following chapters provide an overview of the function itself, followed by the function as implemented in the GH180 drive.
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Introduction3.1 Background
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Advanced Motor Protection Parameters 44.1 Standard Protections Block Diagram
Time Protections Standard Block DiagramA standard block diagram is used for many definite time protections. The Motor Protection Relay function design for various time protections is shown in the figure Generalized Protection Function Block Diagram.
Low Pass
FilterProtec!on Variable
(Voltage, Current,
etc.)
Pickup
Level
>
<Σ
+
-
1=pickup
0=dropout
Enable (1)
Disable (0)
Time
Constant
Pickup
Time Delay
(Counter)
Dropout
Time Delay
(Counter)
Count
Enable
Zero
>=
>=
Output
Output
Pickup
Time Delay
Dropout
Time Delay
Count
Enable
Trip or Alarm
Output
Reset
Reset
Over/
Under
Select
Low Pass
Filter
Time
Constant
Reset
1-(Dropout
Level)
Latch Control
1 = latched
Zero
Pickup
Timed
Out
Dropout
Timed
Out
Figure 4-1 Generalized Protection Function Block Diagram
Note
Refer to the appendix of this manual and IEEE C37.2 to obtain further information about device numbers and functions.
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The functions that operate in accordance with the standard architecture are:
● Device 12 - Fixed pickup overspeed
● Device 12 - Variable pickup overspeed
● Device 14 - Fixed pickup underspeed
● Device 14 - Variable pickup underspeed
● Device 37 - Fixed pickup undercurrent
● Device 37 - Variable pickup undercurrent
● Device 37P - Fixed pickup underpower
● Device 39 - Mechanical condition monitor - Fixed pickup torque pulsation
● Device 46_2 - Phase-balance current - Fixed pickup negative sequence overcurrent
● Device 49RTD - Machine thermal overload - Fixed pickup RTD protection
● Device 50 - Fixed pickup instantaneous overcurrent
● Device 51 - Fixed pickup inverse time overcurrent
● Device 55 - Fixed pickup maximum power factor
● Device 55 - Fixed pickup minimum power factor
● Device 59G - Fixed pickup definite minimum time zero sequence overvoltage
● Device 81 - Fixed pickup overfrequency
● Device 81 - Variable pickup overfrequency
● Device 81 - Fixed pickup underfrequency
● Device 81 - Fixed pickup high frequency rate of change
The standard block compares a protection variable to a reference which is referred to in the block diagram as the pickup level. To illustrate, for the fixed underspeed protection, the reference would be motor speed, and the pickup level would be the Fixed Underspeed Pickup Level (7218).
The comparator can be configured to make the block an "over" function (a trip or alarm can be generated when the protection variable is higher than the pickup level) or an "under" function (a trip or alarm can be generated when the protection variable is lower than the pickup level). Adjustable low pass filtering is accomplished on both the protection variable and the pickup level prior to the variables being applied to the greater than or less than comparator function.
A true state (logic one) at the output of the comparator indicates that a pickup is occurring and that a trip or alarm may result. The pickup condition modifies the threshold of the comparator with a programmable amount of hysteresis to avoid excessive toggling due to noise in the reference or protection variable. The amount of hysteresis is determined as a percentage of the pickup level by the adjustable parameter referred to as the dropout level.
The block uses two counters to control the generation of an alarm or trip output. The output can be used as a trip signal or as an alarm signal where the alarm can be set to a latched mode or an unlatched mode. The two counters are the pickup time delay counter and the dropout time delay counter. The pickup time delay counter is used to delay the time between a pickup and the generation of a trip or alarm signal. The pickup time delay is a programmable parameter that can be adjusted over a range that depends on the particular protection variable being used.The
Advanced Motor Protection Parameters4.1 Standard Protections Block Diagram
Advanced Motor Protection for Variable Speed Operation18 Manual, AA, A5E46373908A
dropout time delay counter is used to delay the reset of the pickup timer if the protection variable changes such as to cause the pickup signal to return to a false (logic zero) condition.
In the simplest case of operation, the protection variable exceeds the pickup level and remains there. The pickup time delay counter would start counting until the value of the counter exceeds the "pickup time delay" and a trip or alarm would be generated. The dropout time delay counter has no involvement in this simplest type of operation. This case is shown in the top line of figure Various Pickup and Dropout Time Delay Counter Various Examples of Operation for the cases of latched and unlatched operation.
Figure 4-2 Various Pickup and Dropout Time Delay Counter Examples of Operation
The dropout time delay counter is used to reset the pickup time delay counter when the pickup condition disappears. The second line of Various Pickup and Dropout Time Delay Counter Examples of Operation shows the case where the pickup signal goes to zero for a time greater than the value of the dropout time delay. The dropout time delay is a programmable parameter that is shown in figure Generalized Protection Function Block Diagram. The dropout time delay counter counts up once the pickup signal becomes false and resets the pickup time delay counter.
Advanced Motor Protection Parameters4.1 Standard Protections Block Diagram
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 19
The bottom two rows of the second figure shown show more complex behaviors involving shorter time variations of the pickup signal.
Boolean Logic equations for the counters are
Pickup Counter● Count = /Pickup timed out * enabled * pickup● Reset = Reset (ext) + Dropout timed out
Dropout Counter● Count = /(/Pickup * /Pickup timer) * (/Pickup timed out + /Latch
control * Pickup timed out)● Reset = /(Dropout timed out + /Dropout) * (Pickup timed out * Latch
control) + Reset (ext)where:/ indicates a logical inversion (not)+ indicates a logical OR* indicates a logical AND
Fixed Pickup Protections Fixed pickup protection functions allow a single pickup level to be programmed that remains a constant over the entire operating speed range of the drive.
Example: For fixed pickup overspeed protection, when the speed of the machine exceeds the programmed pickup level then the logic of the standard block diagram starts the pickup timer. If the pickup condition persists for longer than the programmed time then a trip or alarm will occur.
The pickup level is independent of the speed setting (speed demand) of the drive.
Demand Dependency for Variable Pickup Protections Variable pickup protection functions allow a pickup level to be programmed as a function of the commanded speed of the drive (speed demand). The pickup levels are entered as a set of 20 points starting from 0% demand to 190% demand setting. Linear interpolation is used between the points.
Example: If a 10% overspeed pickup is set at 0% demand and a 20% overspeed pickup is set at 10% demand, the effective pickup level at 5% demand will be 15%. The pickup level will remain constant at the 190% demand setting for demand settings in excess of 190%. If the 190% demand setting pickup level is set to 210%, the pickup level at 200% demand will also be 210%. See Figure Variable Pickup Undercurrent.To further illustrate, assume that the variable pickup undercurrent function is being used; and the pickup levels are set to the values shown in column 2 of Table "Pickup Level Settings for Level Settings for Variable Undercurrent Protection Example".
Table 4-1 Pickup Level Settings for Variable Undercurrent Protection Example
Speed Demand (%) Undercurrent Pickup Level (%)0 1010 1020 10
Advanced Motor Protection Parameters4.1 Standard Protections Block Diagram
Advanced Motor Protection for Variable Speed Operation20 Manual, AA, A5E46373908A
Speed Demand (%) Undercurrent Pickup Level (%)30 1040 2050 3060 4070 5070 5590 60100 75110 75120 75130 75140 75150 75160 75170 75180 75190 60
The resulting speed demand dependent pickup levels as shown in the figure titled "Variable Pickup Undercurrent Graph " shown below.
Variable Pickup Undercurrent
Speed Demand
Pickup Level
Undercurrent
(%)
(%)
250200150100500
80
70
60
50
40
30
20
10
0
Figure 4-3 Variable Pickup Under Current Graph
Thermal OverloadThe thermal overload protection functions use a thermodynamic model of the machine to predict the total amount of thermal capacity (basically margin to maximum temperature) that has been used as the machine temperature increases. A value of 100% thermal capacity used would imply that the machine is at the maximum allowable temperature. The thermal model uses a k-factor to adjust the value of current at which the machine will eventually reach full rated
Advanced Motor Protection Parameters4.1 Standard Protections Block Diagram
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 21
temperature at maximum rated ambient temperature. There are also heating, cooling, and stopped thermal time constants that dynamically adjust the model to match how quickly the machine will heat up and cool down either when moving or when stopped.
A fixed thermal overload protection function and a variable thermal overload function are provided. The fixed thermal overload function allows the use of a fixed value (does not vary with the drive speed demand setting) of k-factor and the time constants. The variable thermal overload function allows the k-factor, the heating time constant, and the cooling time constant to be made a function of the speed demand setting. The parameters are programmed over a range of speed demand setting from 0 to 190% in the same way as the pickup parameters are set for the variable pickup level protection functions. The k-factor would be adjusted as a function of speed to account for changes in the machine losses as the electrical frequency changes. The time constants would be adjusted to account for changes in the heat transfer characteristics of the machine as the speed changes.
See alsoInstallation External Wiring (Page 27)
IEEE Device Numbers and Functions (Page 169)
Advanced Motor Protection Parameters4.1 Standard Protections Block Diagram
Advanced Motor Protection for Variable Speed Operation22 Manual, AA, A5E46373908A
4.2 IntroductionThe next chapters of this manual provide a brief of description of each AMP device protection. Additional technical data, including keypad and tool parameter text, ID, units, and values are shown in table format which provideds the end-user with easy access to device specific data. Where applicable, block diagrams, equations, and curves are also provided.
AMP Hardware Block DiagramTo better understand advanced motor protection hardware provided with your drive, refer to the AMP Hardware Block Diagram. Along with the type of hardware, the input to the 4-channel and 8-channel RTDs, the PLC input, Ethernet Switch, RTD channels, and power are depicted.
Advanced Motor Protection Parameters4.2 Introduction
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 23
Ethernet
Power
8 Resistance Temperature Detectors
4 Resistance Temperature Detectors
+24V Power
Detector Module
Resistance Temperature
8 Channel
Module
Detector
Temperature
Resistance
4 Channel
Controller
Logic
Programmable
Switch
Ethernet
1200-S7
Figure 4-4 AMP Hardware Block Diagram
Per-unit Values
All the AMP functions use per-unit values to set pickup and dropout levels as well as speed-based enables. In a per-unit system, engineering quantities (such as voltages or currents) are normalized to their rated or maximum values. The value of the resultant per-unit values is typically zero to one although the values can be and are often expressed in percentages. The AMP system uses percentage values to set per-unit quantities. Voltage, current, frequency,
Advanced Motor Protection Parameters4.2 Introduction
Advanced Motor Protection for Variable Speed Operation24 Manual, AA, A5E46373908A
power, torque, and speed are per-unit quantities in the AMP. Time, temperature, and power factor are not handled as per-unit quantities and are expressed in units of seconds and degrees Celsius or Fahrenheit, power factor does not have any associated units. For example, consider a 1 MW machine with a rated voltage of 4160 V, and a full load current of 162A with a rated speed of 1785 RPM that is designed to operate with 60 Hz power. This is a four-pole machine, so the synchronous speed of the machine is 1800 RPM. The relationship between the engineering units and per-unit quantities are shown in the table titled, "Per-unit Engineering Unit Quantities".
Table 4-2 Example of per-unit and engineering unit quantities
Quantity 1 Per Unit Value (100%)Speed 1800 RPMPower 1 MWCurrent (positive or negative sequence) 162 ARMSTorque 5350 N-mVoltage (line-to-line, positive or negative sequence) 4160 VRMSVoltage (zero sequence) 2402 VRMSFrequency 60 Hz
Advanced Motor Protection Parameters4.2 Introduction
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 25
4.3 Protection Function Enable TypesThere are four types of enables used to control startup and disabling of the protection functions. They are: Startup Time, Minimum Speed Enable, Minimum Speed Reset, and Fixed Torque Pulsation Minimum Speed Enable.
The following paragraphs describe the operation of the various enables.
1. Startup Time is used to delay the startup of the protection function from the time that the run command is issued. Following startup, the protection function will remain disabled until the startup time has elapsed. Once the Startup Time has been met, the protection function will be enabled unless another startup function continues to disable the protection function. The startup time delay will be repeated if the drive is stopped and then started again.
2. Minimum Speed Enable is used to delay the startup of the protection function until the machine achieves a minimum speed. Once the speed of the machine exceeds the Minimum Speed Enable setting, the function is enabled and will remain enabled until the drive is stopped (stop command, trip, etc.) unless another startup function continues to disable the protection function (such as Startup Time). The function will remain enabled even if the speed is reduced below the Minimum Speed Enable setting once that setting has been exceeded for the first time. The Minimum Speed Enable is reset when the drive is stopped, and the minimum speed will have to be reached again if the drive is stopped and then started again.
3. Minimum Speed Reset is used to disable a protection function when the speed demand is less than a specified value. When the demand setting is below the Minimum Speed Reset setting, the protection function is reset. Any startup time delay or minimum speed enable will be reset and the conditions of those enables will have to be met before the protection function will be enabled again.
4. Fixed Torque Pulsation Minimum Speed Enable is a unique enable applicable only to the excessive torque pulsation protection function. The setting resets the protection when the motor speed is below the setting. This setting should be used to avoid trips due to conditions where low motor speed is likely to result in false trips due to the finite sampling window of the torque pulsation function.
Advanced Motor Protection Parameters4.3 Protection Function Enable Types
Advanced Motor Protection for Variable Speed Operation26 Manual, AA, A5E46373908A
RTD Terminal Connections 55.1 Installation External Wiring
Installation External WiringCustomer-supplied low-voltage control cables enter via access plates in the top or bottom of the VFD enclosure. Refer to the project drawings for access plate locations.
Customer-supplied Resistance Temperature Detector (RTD) extension wiring terminates to terminal block TB2RTD in the VFD enclosure. An example is shown below in figure RTD Termination Diagram. Refer to the project drawings for complete TB2RTD layout details.
Figure 5-1 RTD Termination Diagram (for internal and external wiring)
Note
Customer must loop-back (short) all unused RTD inputs. Doing so avoids interference pickup on unused channels which can couple into the channels that are being used. Ensure all unused RTD inputs are shorted to earth ground. Refer to figure Internal and External Wiring for Unused RTD inputs.
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 27
Figure 5-2 Internal and External Wiring for Unused RTD Inputs
See alsoStandard Protections Block Diagram (Page 17)
RTD Terminal Connections5.1 Installation External Wiring
Advanced Motor Protection for Variable Speed Operation28 Manual, AA, A5E46373908A
Advanced Motor Protection and RTD Protection Functions 66.1 Top Level Menu and Submenus
The following tables contain the Advanced Motor Protection parameters. Refer to the NXGpro Control Manual (A5E33474566) to view the GH180 standard motor protection parameters.
This menu item is located at the end of the menu for Drive Protections - "Drive Protect" (7) and follows menu "Thermal OT Rollback" (7170) in menu (7).
Note
Menu 7 is the top of the 7000 series Drive Protect parameters.
Parameter ID Unit Default Min Max DescriptionAdvanced Motor Protec‐tion
7180 Sub-menu Advanced Motor Protection Features
Advanced Motor Protect Menu (7180) ParametersParameter ID Unit Default Min Max DescriptionTemperature Units 7173 degree Celsius Temperature Units that apply to all temper‐
ature entries selectable by means of a drop-down menu:● Celsius● Fahrenheit
Fixed Over Speed 7181 Sub-menu Device 12 - Fixed Pickup OverspeedVariable Over Speed 7189 Sub-menu Device 12 - Variable Pickup OverspeedFixed Under Speed 7217 Sub-menu Device 14 - Fixed Pickup UnderspeedVariable Under Speed 7226 Sub-menu Device 14 - Variable Pickup UnderspeedFixed Under Current 7256 Sub-menu Device 37 - Fixed Pickup UndercurrentVariable Under Current 7266 Sub-menu Device 37 - Variable Pickup UndercurrentFixed Under Power 7297 Sub-menu Device 37P - Fixed Pickup UnderpowerFixed Torque Pulsation 7306 Sub-menu Device 39 - Mechanical Condition Monitor -
Fixed Pickup Torque PulsationFixed NegSeq Over I 7316 Sub-menu Device 46_2 - Phase Balance Current -
Fixed Pickup Negative Sequence Overcur‐rent
Maximum Start Time 7325 Sub-menu Device 48 - Incomplete Sequence - Maxi‐mum Start Time
Maximum Stop Time 7330 Sub-menu Device 48 - Incomplete Sequence - Maxi‐mum Stop Time
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 29
Advanced Motor Protect Menu (7180) ParametersParameter ID Unit Default Min Max DescriptionFixed Thermal Overload 7335 Sub-menu Device 49T - Machine Thermal Model -
Fixed Parameter Thermal OverloadVar. Thermal Overload 7352 Sub-menu Device 49T - Machine Thermal Model - Var‐
iable Thermal OverloadRTD Protection 7429 Sub-menu Device 49RTD - Machine Thermal Overload
- Fixed Pickup RTD ProtectionFixed Inst. OverCurrent 7515 Sub-menu Device 50 – Fixed Pickup Instantaneous
OvercurrentFixed ZeroSeq OverVolt 7524 Sub-menu Device 59G – Fixed Pickup Definite Mini‐
mum Time Zero Sequence OvervoltageInverseTime OverCurrent 7533 Sub-menu Device 51 – Fixed Pickup Inverse Time
OvercurrentInst. Zero Seq OverVolt 7563 Sub-menu Device 59G - Fixed Pickup Instantaneous
Zero Sequence OvervoltageFixed Max Power Factor 7572 Sub-menu Device 55 - Fixed Pickup Maximum Power
FactorFixed Min Power Factor 7581 Sub-menu Device 55 - Fixed Pickup Minimum Power
FactorMin Starting Interval 7590 Sub-menu Device 66 – Notching or jogging – Starts Per
HourMax Cold Starts per hr 7593 Sub-menu Device 66 – Notching or jogging – Cold
Starts Per HourMax Hot Starts per hr 7598 Sub-menu Device 66 – Notching or jogging – Hot Starts
Per HourMin Therm Cap to Start 7603 Sub-menu Device 66 – Notching or jogging – Maximum
Thermal Capacity Used to StartFixed Over Frequency 7606 Sub-menu Device 81 - Fixed Pickup OverfrequencyVariable Over Frequency 7615 Sub-menu Device 81 - Variable Pickup OverfrequencyFixed Under Frequency 7645 Sub-menu Device 81 - Fixed Pickup UnderfrequencyVariable Underfreq 7654 Sub-menu Device 81 - Variable Pickup UnderfrequencyFixed High-Freq Rate 7684 Sub-menu Device 81 - Fixed Pickup High Frequency
Rate of Change
Advanced Motor Protection and RTD Protection Functions6.1 Top Level Menu and Submenus
Advanced Motor Protection for Variable Speed Operation30 Manual, AA, A5E46373908A
6.2 Device 12 - Fixed Pickup OverspeedOverviewFixed pickup overspeed is used to protect the motor and connected load against excessive speed. The fixed pickup overspeed function provides a single speed point setting that produces a trip or alarm condition when that speed is exceeded. The function can be enabled once a programmable time period has elapsed since the starting of the motor. The per-unit speed protection variable may be derived from a flux based Phase Locked Loop (PLL) or encoder.
NoteEncoder Loss
Depending upon the value of parameter 1320 (encoder loss response), when a loss of the encoder occurs, the drive will either default to the phase locked loop to obtain motor speed information or the drive will stop.
Device 12 provides parameter settings as shown in table Advanced Motor Protection Menu - Fixed Pickup Over Speed.
Table 6-1 Advanced Motor Protection Menu - Fixed Pickup Over Speed (ID 7181)
Keypad Parameter TextTool Parameter Text
ID Units DefaultValue
Minimum - Maximum Value
Pickup LevelFixed Overspeed Pickup Level
7182 % 110 0 - 200
Pickup DelayFixed Overspeed Pickup Delay
7183 sec 1 0 - 6000
Dropout LevelFixed Overspeed Dropout Level
7184 % 2 0 - 50
Dropout DelayFixed Overspeed Dropout Delay
7185 sec 0.1 0 - 6000
Low Pass Time ConstantFixed Overspeed Low Pass Time Con‐stant
7186 msec 0 0 - 1000
Startup TimeFixed Overspeed Delay from Startup
7187 sec 0 0 - 6000
Picklist ID Units DefaultValue
Values
Enable StateFixed Pickup Overspeed Enable State
7188 Disabled ● Disabled● Alarm● Latched/Alarm● Trip
The maximum response time with zero delay (pickup counter=0) is 20 milliseconds. Fixed Pickup Overspeed is mutually exclusive with Variable Pickup Overspeed.
Advanced Motor Protection and RTD Protection Functions6.2 Device 12 - Fixed Pickup Overspeed
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 31
Pickup
Timed
Out
Dropout
Timed
Out
Dropout
Level
Output
Latching
Control
1 = Latched
Time
Constant
Reset
Low Pass
Filter Reset
Reset
Trip or
Alarm
Output
Zero
Count
Enable
Zero
Output
Dropout
Time Delay
Pickup
Time Delay
Output
Count
Enable
Dropout
Time Delay
(Counter)
Pickup
Time Delay
(Counter)
Time
Constant
1 = Enable
0 = Disable
1 = pickup
0 = dropout
Motor Speed
Pickup
Level
Low Pass
Filter
>=
>=
+
-
Σ >
Figure 6-1 Overspeed Protection Diagram
Advanced Motor Protection and RTD Protection Functions6.2 Device 12 - Fixed Pickup Overspeed
Advanced Motor Protection for Variable Speed Operation32 Manual, AA, A5E46373908A
6.3 Device 12 - Variable Pickup OverspeedOverviewVariable pickup overspeed is used to protect the motor and connected load against excessive speed or to detect conditions under which the motor speed has risen in excess of the desired setpoint. The variable pickup overspeed function provides a curve of overspeed points as a function of the commanded motor speed. A trip or alarm condition occurs when that speed is exceeded. The function can be enabled once a programmable time period has elapsed since the starting of the motor. The per-unit speed protection variable may be derived from a flux based Phase Locked Loop (PLL) or encoder.
NoteEncoder Loss
Depending upon the value of parameter 1320 (encoder loss response), when a loss of the encoder occurs, the drive will either default to the phase locked loop to obtain motor speed information or the drive will stop.
Device 12 provides parameter status as shown in table Advanced Motor Protection Menu - Variable Pickup Over Speed.
Table 6-2 Advanced Motor Protection Menu - Variable Pickup Over Speed (ID 7189)
Keypad Parameter TextTool Parameter Help Text
ID Units Default Val‐ue
Minimum - Maximum Value
OverSpeed CurveOverSpeed Curve
7190 Sub-menu
Pickup DelayVariable Overspeed Pickup Delay
7211 sec 1 0 - 6000
Dropout LevelVariable Overspeed Dropout Level
7212 % 2 0 - 50
Dropout DelayVariable Overspeed Dropout Delay
7213 sec 0.1 0 - 6000
Low Pass Time ConstantVariable Overspeed Low Pass Time Constant
7214 msec 0 0 - 1000
Startup TimeVariable Overspeed Delay from Startup
7215 sec 0 0 - 6000
Picklist ID Units DefaultValue
Values
Enable StateVariable Pickup Overspeed Enable State
7216 Disabled ● Disabled● Alarm● LatchedAlarm● Trip
Advanced Motor Protection and RTD Protection Functions6.3 Device 12 - Variable Pickup Overspeed
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 33
OverSpeed Curve Menu (7190)
Keypad Parameter TextTool Parameter Help Text
ID Units DefaultValue
Minimum - Maximum Value
0% Speed PickupDefine Pickup Level in %Speed at 10% Demanded Speed
7191 % 10 0 - 250
10% Speed PickupDefine Pickup Level in %Speed at 20% Demanded Speed
7192 % 20 0 - 250
20% Speed PickupDefine Pickup Level in %Speed at 30% Demanded Speed
7193 % 30 0 - 250
30% Speed PickupDefine Pickup Level in %Speed 40% Demanded Speed
7194 % 40 0 - 250
40% Speed PickupDefine Pickup Level in %Speed at 50% Demanded Speed
7195 % 50 0 - 250
50% Speed PickupDefine Pickup Level in %Speed at 60% Demanded Speed
7196 % 60 0 - 250
60% Speed PickupDefine Pickup Level in %Speed at 70% Demanded Speed
7197 % 70 0 - 250
70% Speed PickupDefine Pickup Level in %Speed at 80% Demanded Speed
7198 % 80 0 - 250
80% Speed PickupDefine Pickup Level in %Speed at 90% Demanded Speed
7199 % 90 0 - 250
90% Speed PickupDefine Pickup Level in %Speed at 100% Demanded Speed
7200 % 100 0 - 250
100% Speed PickupDefine Pickup Level in %Speed at 110% Demanded Speed
7201 % 110 0 - 250
110% Speed PickupDefine Pickup Level in %Speed at-120% Demanded Speed
7202 % 120 0 - 250
120% Speed PickupDefine Pickup Level in %Speed at 130% Demanded Speed
7203 % 130 0 - 250
130% Speed PickupDefine Pickup Level in %Speed at 140% Demanded Speed
7204 % 140 0 - 250
Advanced Motor Protection and RTD Protection Functions6.3 Device 12 - Variable Pickup Overspeed
Advanced Motor Protection for Variable Speed Operation34 Manual, AA, A5E46373908A
Keypad Parameter TextTool Parameter Help Text
ID Units DefaultValue
Minimum - Maximum Value
140% Speed PickupDefine Pickup Level in %Speed at 150% Demanded Speed
7205 % 150 0 - 250
150% Speed PickupDefine Pickup Level in %Speed at 160% Demanded Speed
7206 % 160 0 - 250
160% Speed PickupDefine Pickup Level in %Speed at 170% Demanded Speed
7207 % 170 0 - 250
170% Speed PickupDefine Pickup Level in %Speed at 180% Demanded Speed
7208 % 180 0 - 250
180% Speed PickupDefine Pickup Level in %Speed at 190% Demanded Speed
7209 % 190 0 - 250
190% Speed PickupDefine Pickup Level in %Speed at 200% Demanded Speed
7210 % 200 0 - 250
The maximum response time with zero delay (pickup counter=0) is 20 milliseconds. Variable Pickup Overspeed is mutually exclusive with Fixed Overspeed.
Advanced Motor Protection and RTD Protection Functions6.3 Device 12 - Variable Pickup Overspeed
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 35
Pickup
Timed
Out
Dropout
Timed
Out
Dropout
Level
Output
Latching
Control
1 = Latched
Time
Constant
Reset
Low Pass
Filter Reset
Reset
Trip or
Alarm
Output
Zero
Count
Enable
Zero
Output
Dropout
Time Delay
Pickup
Time Delay
Output
Count
Enable
Dropout
Time Delay
(Counter)
Pickup
Time Delay
(Counter)
Time
Constant
1 = Enable
0 = Disable
1 = pickup
0 = dropout
Motor Speed
Pickup
Level
Low Pass
Filter
>=
>=
+
-
Σ >
Figure 6-2 Overspeed Protection Diagram
Advanced Motor Protection and RTD Protection Functions6.3 Device 12 - Variable Pickup Overspeed
Advanced Motor Protection for Variable Speed Operation36 Manual, AA, A5E46373908A
6.4 Device 14 - Fixed Pickup UnderspeedOverviewFixed pickup underspeed is used to protect the motor and connected load against operation at speeds below the desired speed. The fixed pickup underspeed function provides a single underspeed point setting that produces a trip or alarm condition when that speed falls below that value. The function offers a minimum speed enable that only allows activation of this function after the programmable minimum speed has been reached. Once the minimum speed has been reached, the function remains enabled regardless of speed until the drive stops. The per-unit speed protection variable may be derived from a flux based Phase Locked Loop (PLL) or encoder.
NoteEncoder Loss
Depending upon the value of parameter 1320 (encoder loss response), when a loss of the encoder occurs, the drive will either default to the phase locked loop to obtain motor speed information or the drive will stop.
NoteSetting Fixed Pickup and Variable Pickup Underspeed Protection Parameters
When setting Fixed Pickup and Variable Pickup Underspeed Protection Parameters, ensure that settings are consistent with drive capabilities and with the settings of the accelerationramp settings, Refer to the relevant NXGpro Control Manual (A5E33474566) provided with your drive.
Device 14 provides parameter status as shown in table Advanced Motor Protection Menu - Fixed Pickup Underspeed.
Table 6-3 Advanced Motor Protection Menu - Fixed Pickup Underspeed Device (ID 7217)
Keypad Parameter TextTool Parameter Text
ID Units DefaultValue
Minimum - Maximum Value
Pickup LevelFixed Underspeed Pickup Level
7218 % 5 0 - 100
Pickup DelayFixed Underspeed Pickup Delay
7219 sec 1 0 - 180
Dropout LevelFixed Underspeed Dropout Level
7220 % 102 100 - 200
Dropout DelayFixed Underspeed Dropout Delay
7221 sec 0.1 0 - 180
Low Pass Time ConstantFixed Underspeed Low Pass Time Constant
7222 msec 0 0 - 1000
Minimum Speed Enable 7223 % 50 0 - 100Startup TimeFixed Pickup Underspeed Delay from Startup
7224 sec 0 0 - 200
Advanced Motor Protection and RTD Protection Functions6.4 Device 14 - Fixed Pickup Underspeed
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 37
Picklist ID Units DefaultValue
Values
Enable StateFixed Underspeed w/ Min Speed Enable - Enable State
7225 0 Disabled ● Disabled● Alarm● LatchedAlarm● Trip
The maximum response time with zero delay (pickup counter=0) is 20 milliseconds. Fixed Pickup Underspeed is mutually exclusive with Variable Pickup Underspeed.
Pickup
Timed
Out
Dropout
Timed
Out
1 - Dropout
Level
Output
Latching
Control
1 = Latched
Time
Constant
Reset
Low Pass
Filter Reset
Reset
Trip or
Alarm
Output
Zero
Count
Enable
Zero
Output
Dropout
Time Delay
Pickup
Time Delay
Output
Count
Enable
Dropout
Time Delay
(Counter)
Pickup
Time Delay
(Counter)
Time
Constant
1 = Enable
0 = Disable
1 = pickup
0 = dropout
Motor Speed
Pickup
Level
Low Pass
Filter
>=
>=
+
-
Σ <
Figure 6-3 Underspeed Protection Diagram
Advanced Motor Protection and RTD Protection Functions6.4 Device 14 - Fixed Pickup Underspeed
Advanced Motor Protection for Variable Speed Operation38 Manual, AA, A5E46373908A
6.5 Device 14 - Variable Pickup UnderspeedOverviewVariable pickup underspeed is used to protect the motor and connected load against operation at lower speeds than desired or to detect conditions under which the motor speed has fallen below the desired setpoint due to problems with excessive load torque or torque production difficulties in the machine. The variable pickup underspeed function provides a curve of speed points as a function of the commanded motor speed. A trip or alarm condition occurs when that speed falls below the curve at a given speed setting. The function offers a minimum speed enable that only allows activation of this function after the programmable minimum speed has been reached. Once the minimum speed has been reached, the function remains enabled regardless of speed until the drive stops or the demand is set to a value below the minimum speed reset. The minimum speed reset is used to define a range of demand settings below which the function will remain in a reset condition. The per-unit speed protection variable may be derived from a flux based Phase Locked Loop (PLL) or encoder.
NoteEncoder Loss
Depending upon the value of parameter 1320 (encoder loss response), when a loss of the encoder occurs, the drive will either default to the phase locked loop to obtain motor speed information or the drive will stop.
NoteSetting Fixed Pickup and Variable Pickup Underspeed Protection Parameters
When setting Fixed Pickup and Variable Pickup Underspeed Protection Parameters, ensure that settings are consistent with drive capabilities and with the settings of the accelerationramp settings, Refer to the relevant NXGpro Control Manual NXGpro Control Manual (A5E33474566) provided with your drive.
Device 14 provides parameter status as shown in table Advanced Motor Protection Menu - Variable Pickup Underspeed .
Table 6-4 Advanced Motor Protection Menu - Variable Pickup Underspeed (ID 7226)
Keypad Parameter TextTool Parameter Help Text
ID Units DefaultValue
Minimum - Maximum Val‐ue
UnderSpeed CurveUnderSpeed Curve
7227 Sub-menu
Pickup DelayVariable Underspeed w/ Min Speed Enable Pickup Delay
7248 sec 1 0 - 6000
Dropout LevelVariable Underspeed w/ Min Speed Enable Drop‐out Level
7249 % 102 100 - 200
Dropout DelayVariable Underspeed w/ Min Speed Enable Drop‐out Delay
7250 sec 0.1 0 - 600
Advanced Motor Protection and RTD Protection Functions6.5 Device 14 - Variable Pickup Underspeed
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 39
Keypad Parameter TextTool Parameter Help Text
ID Units DefaultValue
Minimum - Maximum Val‐ue
Low Pass Time ConstantVariable Underspeed w/ Min Speed Enable Low Pass Time Constant
7251 msec 0 0 - 1000
Minimum SpeedVariable Underspeed w/ Min Speed Enable Point
7252 % 0 0 - 100
Minimum Speed ResetVariable Underspeed w/ Min Speed Enable Speed Reset Point
7253 % 10 0 - 100
Startup TimeVariable Underspeed w/ Min Speed Enable from Startup
7254 sec 0 0 - 6000
Picklist ID Units DefaultValue
Values
Enable StateVariable Underspeed Enable State
7255 Disabled ● Disabled● Alarm● LatchedAlarm● Trip
UnderSpeed Curve Menu (7227)
Keypad Parameter TextTool Parameter Help Text
ID Units DefaultValue
Minimum - Maximum Val‐ue
0% Speed PickupDefine Pickup Level in %Speed at 0% Demanded Speed
7228 % 0 0 - 200
10% Speed PickupDefine Pickup Level in %Speed at 10% Demanded Speed
7229 % 0 0 - 200
20% Speed PickupDefine Pickup Level in %Speed at 20% Demanded Speed
7230 % 10 0 -200
30% Speed PickupDefine Pickup Level in %Speed at 30% Demanded Speed
7231 % 20 0 - 200
40% Speed PickupDefine Pickup Level in %Speed at 40% Demanded Speed
7232 % 30 0 - 200
50% Speed PickupDefine Pickup Level in %Speed at 50% Demanded Speed
7233 % 40 0 - 200
60% Speed PickupDefine Pickup Level in %Speed at 60% Demanded Speed
7234 % 50 0 - 200
Advanced Motor Protection and RTD Protection Functions6.5 Device 14 - Variable Pickup Underspeed
Advanced Motor Protection for Variable Speed Operation40 Manual, AA, A5E46373908A
Keypad Parameter TextTool Parameter Help Text
ID Units DefaultValue
Minimum - Maximum Val‐ue
70% Speed PickupDefine Pickup Level in %Speed at 70% Demanded Speed
7235 % 60 0 - 200
80% Speed PickupDefine Pickup Level in %Speed at 80% Demanded Speed
7236 % 70 0 - 200
90% Speed PickupDefine Pickup Level in %Speed at 90% Demanded Speed
7237 % 80 0 - 250
100% Speed PickupDefine Pickup Level in %Speed at 100% Demanded Speed
7238 % 90 0 - 200
110% Speed PickupDefine Pickup Level in %Speed at 110% Demanded Speed
7239 % 100 0 - 200
120% Speed PickupDefine Pickup Level in %Speed at 120% Demanded Speed
7240 % 110 0 - 200
130% Speed PickupDefine Pickup Level in %Speed at 130% Demanded Speed
7241 % 120 0 - 200
140% Speed PickupDefine Pickup Level in %Speed at 140% Demanded Speed
7242 % 130 0 - 200
150% Speed PickupDefine Pickup Level in %Speed at 150% Demanded Speed
7243 % 140 0 - 200
160% Speed PickupDefine Pickup Level in %Speed at 160% Demanded Speed
7244 % 150 0 - 200
170% Speed PickupDefine Pickup Level in %Speed at 170% Demanded Speed
7245 % 160 0 - 200
180% Speed PickupDefine Pickup Level in %Speed at 180% Demanded Speed
7246 % 170 0 - 200
190% Speed PickupDefine Pickup Level in %Speed at 190% Demanded Speed
7247 % 180 0 - 200
The maximum response time with zero delay (pickup counter=0) is 20 milliseconds. Variable Underspeed is mutually exclusive with Fixed Underspeed.
Advanced Motor Protection and RTD Protection Functions6.5 Device 14 - Variable Pickup Underspeed
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 41
Pickup
Timed
Out
Dropout
Timed
Out
1 - Dropout
Level
Output
Latching
Control
1 = Latched
Time
Constant
Reset
Low Pass
Filter Reset
Reset
Trip or
Alarm
Output
Zero
Count
Enable
Zero
Output
Dropout
Time Delay
Pickup
Time Delay
Output
Count
Enable
Dropout
Time Delay
(Counter)
Pickup
Time Delay
(Counter)
Time
Constant
1 = Enable
0 = Disable
1 = pickup
0 = dropout
Motor Speed
Pickup
Level
Low Pass
Filter
>=
>=
+
-
Σ <
Figure 6-4 Underspeed Protection Diagram
Advanced Motor Protection and RTD Protection Functions6.5 Device 14 - Variable Pickup Underspeed
Advanced Motor Protection for Variable Speed Operation42 Manual, AA, A5E46373908A
6.6 Device 37 - Fixed Pickup UndercurrentOverviewFixed pickup undercurrent is used to protect the motor against operation with RMS phase currents that are below the desired level. The fixed pickup undercurrent function provides an RMS phase current setting that produces a trip or alarm condition when the current falls below that value. The function can be programmed to produce a trip or an alarm when any one, any two, or all three of the phase currents (Phase A, Phase B, Phase C RMS currents) is below the set point. The function offers a minimum speed enable that only allows activation of this function after the programmable minimum speed has been reached. Once the minimum speed has been reached, the function remains enabled regardless of speed until the drive stops or the demand is set to a value below the minimum speed reset. The minimum speed reset is used to define a range of demand settings below which the function will remain in a reset condition. The per-unit speed protection variable may be derived from a flux based Phase Locked Loop (PLL) or encoder.
NoteEncoder Loss
Depending upon the value of parameter 1320 (encoder loss response), when a loss of the encoder occurs, the drive will either default to the phase locked loop to obtain motor speed information or the drive will stop.
Device 37 provides parameter status as shown in table Advanced Motor Protection Menu - Fixed Pickup Undercurrent.
Table 6-5 Advanced Motor Protection Menu - Fixed Pickup Undercurrent Device (ID 7256)
Keypad Parameter TextTool Parameter Text
ID Units DefaultValue
Minimum - Maximum Value
Pickup LevelFixed Under Current Pickup Level
7257 % 5 0 - 100
Pickup DelayFixed Under Current Pickup Delay
7258 sec 1 0 - 180
Dropout LevelFixed Under Current Dropout Level
7259 % 102 100 - 200
Dropout DelayFixed Under Current Dropout Delay
7260 sec 0.1 0 - 180
Low Pass Time ConstantFixed Under Current Low Pass Time Constant
7261 msec 0 0 - 1000
Minimum Speed EnableFixed Under Current Enable Point
7262 % 20 0 - 100
Startup TimeFixed Under Current Delay from Startup
7263 sec 5 0 - 200
Advanced Motor Protection and RTD Protection Functions6.6 Device 37 - Fixed Pickup Undercurrent
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 43
Picklist ID Units DefaultValue
Values
Enable StateFixed Under Current Enable State
7264 Disabled ● Disabled● Alarm● LatchedAlarm● Trip
Phase SelectionFixed Under Current Select Phases to Monitor
7265 Any Phase ● Any Phase● Any Two Phases● All Phases
The maximum response time with zero delay (pickup counter=0) is 10 milliseconds. Fixed Pickup Under Current is mutually exclusive with Variable Pickup Under Current.
Pickup
Timed
Out
Dropout
Timed
Out
1 - Dropout
Level
Output
Latching
Control
1 = Latched
Time
Constant
Reset
Low Pass
Filter Reset
Reset
Trip or
Alarm
Output
Zero
Count
Enable
Zero
Output
Dropout
Time Delay
Pickup
Time Delay
Output
Count
Enable
Dropout
Time Delay
(Counter)
Pickup
Time Delay
(Counter)
Time
Constant
1 = Enable
0 = Disable
1 = pickup
0 = dropout
RMS Phase
Current
Pickup
Level
Low Pass
Filter
>=
>=
+
-
Σ <
Figure 6-5 UnderCurrent Protection
Advanced Motor Protection and RTD Protection Functions6.6 Device 37 - Fixed Pickup Undercurrent
Advanced Motor Protection for Variable Speed Operation44 Manual, AA, A5E46373908A
6.7 Device 37 - Variable Pickup UndercurrentOverviewVariable pickup undercurrent is used to protect the load / system operation with RMS phase currents that are below the desired level where sensitivity to the speed demand setting is important. The variable pickup undercurrent function provides a curve of undercurrent set points as a function of the commanded motor speed. A trip or alarm condition occurs when the current falls below the curve at a given speed setting. The function can be programmed to produce a trip or an alarm when any one, any two, or all three of the phase currents is below the set point. The function offers a minimum speed enable that only allows activation of this function after the programmable minimum speed has been reached. Once the minimum speed has been reached, the function remains enabled regardless of speed until the drive stops or the demand is set to a value below the minimum speed reset. The minimum speed reset is used to define a range of demand settings below which the function will remain in a reset condition. The function can also be enabled once a programmable time period has elapsed since the starting of the motor. The per-unit speed protection variable may be derived from a flux based Phase Locked Loop (PLL) or encoder.
NoteEncoder Loss
Depending upon the value of parameter 1320 (encoder loss response), when a loss of the encoder occurs, the drive will either default to the phase locked loop to obtain motor speed information or the drive will stop.
Device 37 provides parameter status as shown in table Advanced Motor Protection Menu - Variable Pickup Undercurrent .
Table 6-6 Advanced Motor Protection Menu - Variable Pickup Undercurrent Device (ID 7266)
Keypad Parameter TextTool Parameter Help Text
ID Default Value
Units Minimum - Maximum Value
Under Current Curve 7267 Sub-menuPickup DelayVariable Underspeed Pickup Delay
7288 1 sec 0 - 180
Dropout LevelVariable Underspeed Dropout Level
7289 102 % 100 - 200
Dropout DelayVariable Underspeed Dropout Delay
7290 0.1 sec 0 - 180
Low Pass Time ConstantVariable Underspeed Low Pass Time Constant
7291 0 msec 0 - 1000
Minimum SpeedVariable Underspeed Enable Point
7292 20 % 0 - 100
Minimum Speed ResetVariable Underspeed Speed Reset Point
7293 10 % 0 - 100
Startup TimeVariable Underspeed from Startup
7294 5 sec 0 - 6000
Advanced Motor Protection and RTD Protection Functions6.7 Device 37 - Variable Pickup Undercurrent
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 45
Picklist ID Units Default Value
Values
Enable StateVariable Under Current w/ Min Speed Enable - Enable State
7295 Disa‐bled
● Disabled● Alarm● LatchedAlarm● Trip
Phase SelectionVariable Under Current Select Phases to Monitor
7296 Any Phase
● Any Phase● Any Two Phases● All Phases
Under Current Curve Menu (7267)
Keypad Parameter TextTool Parameter Help Text
ID Default Value
Units Minimum - Maximum Value
0% Speed PickupDefine Pickup Level in % of FLA at at 0% Demanded Speed
7268 0 % -1 - 200
10% Speed PickupDefine Pickup Level in % of FLA at 10% Demanded Speed
7269 0.9 % 0 - 200
20% Speed PickupDefine Pickup Level in % of FLA at 20% Demanded Speed
7270 3.6 % 0 -200
30% Speed PickupDefine Pickup Level in % of FLA at 30% Demanded Speed
7271 8.1 % 0 - 200
40% Speed PickupDefine Pickup Level in % of FLA at 40% Demanded Speed
7272 14.4 % 0 - 200
50% Speed PickupDefine Pickup Level in % of FLA at 50% Demanded Speed
7273 22.5 % 0 - 200
60% Speed PickupDefine Pickup Level in % of FLA at 60% Demanded Speed
7274 32.4 % 0 - 200
70% Speed PickupDefine Pickup Level in % of FLA at 70% Demanded Speed
7275 44.1 % 0 - 200
80% Speed PickupDefine Pickup Level in % of FLA at 80% Demanded Speed
7276 57.6 % 0 - 200
90% Speed PickupDefine Pickup Level in % of FLA at 90% Demanded Speed
7277 72.9 % 0 - 250
100% Speed PickupDefine Pickup Level in % of FLA at 100% Demanded Speed
7278 90 % 0 - 200
110% Speed PickupDefine Pickup Level in % of FLA at 110% Demanded Speed
7279 90 % 0 - 200
120% Speed PickupDefine Pickup Level in % of FLA at 120% Demanded Speed
7280 90 % 0 - 200
130% Speed PickupDefine Pickup Level in % of FLA at 130% Demanded Speed
7281 90 % 0 - 200
140% Speed PickupDefine Pickup Level in % of FLA at 140% Demanded Speed
7282 90 % 0 - 200
Advanced Motor Protection and RTD Protection Functions6.7 Device 37 - Variable Pickup Undercurrent
Advanced Motor Protection for Variable Speed Operation46 Manual, AA, A5E46373908A
Keypad Parameter TextTool Parameter Help Text
ID Default Value
Units Minimum - Maximum Value
150% Speed PickupDefine Pickup Level in % of FLA at 150% Demanded Speed
7283 90 % 0 - 200
160% Speed PickupDefine Pickup Level in % of FLA at 160% Demanded Speed
7284 90 % 0 - 200
170% Speed PickupDefine Pickup Level in % of FLA at 170% Demanded Speed
7285 90 % 0 - 200
180% Speed PickupDefine Pickup Level in % of FLA at 180% Demanded Speed
7286 90 % 0 - 200
190% Speed PickupDefine Pickup Level in % of FLA at 190% Demanded Speed
7287 90 % 0 - 200
The maximum response time with zero delay (pickup counter=0) is 10 milliseconds. Variable Pickup Undercurrent is mutually exclusive with Fixed Pickup Undercurrent.
Pickup
Timed
Out
Dropout
Timed
Out
1 - Dropout
Level
Output
Latching
Control
1 = Latched
Time
Constant
Reset
Low Pass
Filter Reset
Reset
Trip or
Alarm
Output
Zero
Count
Enable
Zero
Output
Dropout
Time Delay
Pickup
Time Delay
Output
Count
Enable
Dropout
Time Delay
(Counter)
Pickup
Time Delay
(Counter)
Time
Constant
1 = Enable
0 = Disable
1 = pickup
0 = dropout
RMS Phase
Current
Pickup
Level
Low Pass
Filter
>=
>=
+
-
Σ <
Figure 6-6 Undercurrent Protection Diagram
Advanced Motor Protection and RTD Protection Functions6.7 Device 37 - Variable Pickup Undercurrent
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 47
6.8 Device 37P - Fixed Underpower Relay OverviewFixed pickup underpower is used to protect the motor and connected load against operation at power levels below desired. The fixed pickup underpower function provides a single power point setting that produces a trip or alarm condition when the power falls below that value. The function offers an enable that latches once a programmable minimum speed has been reached. The function can also be enabled once a programmable time period has elapsed since the starting of the motor. The per-unit speed protection variable may be derived from a flux based Phase Locked Loop (PLL) or encoder.
NoteEncoder Loss
Depending upon the value of parameter 1320 (encoder loss response), when a loss of the encoder occurs, the drive will either default to the phase locked loop to obtain motor speed information or the drive will stop.
Device 37P provides parameter status as shown in table Advanced Motor Protection Menu - Fixed Pickup Underpower Relay.
Table 6-7 Advanced Motor Protection Menu - Fixed Pickup Underpower Relay (ID 7297)
Keypad Parameter TextTool Parameter Text
ID Units DefaultValue
Minimum - Maximum Value
Pickup LevelFixed Under Power w/ Min Speed Enable Pickup Level
7298 % 5 0 - 100
Pickup DelayFixed Under Power w/ Min Speed Enable Pickup Delay
7299 sec 1 0 - 180
Dropout LevelFixed Under Power w/ Min Speed Enable Drop‐out Level
7300 % 102 100 - 200
Dropout DelayFixed Under Power w/ Min Speed Enable Drop‐out Delay
7301 sec 0.1 0 - 180
Low Pass Time ConstantFixed Under Power w/ Min Speed Enable Low Pass Time Constant
7302 msec 0 0 - 1000
Minimum SpeedFixed Under Power w/ Min Speed enable Min Speed Enable Point
7303 % 20 0 - 100
Startup TimeFixed Under Power w/ Min Speed Enable Delay from Startup
7304 sec 5 0 - 6000
Advanced Motor Protection and RTD Protection Functions6.8 Device 37P - Fixed Underpower Relay
Advanced Motor Protection for Variable Speed Operation48 Manual, AA, A5E46373908A
Picklist ID Units DefaultValue
Values
Enable StateFixed Under Power w/ Min Speed Enable - Ena‐ble State
7305 Disabled ● Disabled● Alarm● LatchedAlarm● Trip
The maximum response time with zero delay (pickup counter=0) is 10 milliseconds.
Pickup
Timed
Out
Dropout
Timed
Out
1 - Dropout
Level
Output
Latching
Control
1 = Latched
Time
Constant
Reset
Low Pass
Filter Reset
Reset
Trip or
Alarm
Output
Zero
Count
Enable
Zero
Output
Dropout
Time Delay
Pickup
Time Delay
Output
Count
Enable
Dropout
Time Delay
(Counter)
Pickup
Time Delay
(Counter)
Time
Constant
1 = Enable
0 = Disable
1 = pickup
0 = dropout
Motor Power
Pickup
Level
Low Pass
Filter
>=
>=
+
-
Σ <
Figure 6-7 Underpower Protection Diagram
Advanced Motor Protection and RTD Protection Functions6.8 Device 37P - Fixed Underpower Relay
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 49
6.9 Device 38 - Fixed Bearing Temperature Protective DeviceOverviewRefer to Device 49 - Machine Thermal Overload for parameters and settings.
Description● Input measurements:
– Uses any RTD protections identified as "bearing"
● Configuration parameters:
– Refer to Device 49 - Machine Thermal Overload for parameters and settings
The maximum response time with zero delay (pickup counter=0) is 50 milliseconds.
Advanced Motor Protection and RTD Protection Functions6.9 Device 38 - Fixed Bearing Temperature Protective Device
Advanced Motor Protection for Variable Speed Operation50 Manual, AA, A5E46373908A
6.10 Device 39 - Mechanical Condition Monitor - Fixed Pickup Torque Pulsation
OverviewFixed pickup torque pulsation is used to protect the motor and connected load against operation under conditions of high torque pulsation. The fixed pickup torque pulsation function provides a single RMS torque pulsation point setting that produces a trip or alarm condition when RMS torque pulsation rises above that value. The function can be enabled when above a minimum speed. The function can also be enabled once a programmable time period has elapsed since the starting of the motor.
Device 39 provides parameter status as shown in table Advanced Motor Protection Menu - Mechanical Condition Monitor - Fixed Pickup Torque Pulsation.
Table 6-8 Advanced Motor Protection Menu - Mechanical Condition Monitor - Fixed Pickup Torque Pulsation (ID 7306)
Keypad Parameter TextTool Parameter Text
ID Units DefaultValue
Minimum - Maximum Value
Pickup LevelFixed Torque Pulsation Pickup Level
7307 % 5 0 - 100
Pickup DelayFixed Torque Pulsation Pickup Delay
7308 sec 1 0 - 180
Dropout LevelFixed Torque Pulsation Dropout Level
7309 % 2 0 - 50
Dropout DelayFixed Torque Pulsation Dropout Delay
7310 sec 0.1 0 - 180
Low Pass Time ConstantFixed Torque Pulsation Low Pass Time Constant
7311 msec 0 0 - 1000
Minimum Speed EnableFixed Torque Pulsation Enable Point
7312 % 20 5 - 100
Startup TimeFixed Torque Pulsation Delay from Startup
7313 sec 5 0 - 200
Window DurationFixed Torque Pulsation Trms Calc Window Duration
7314 sec 0.1 0.01 - 5
Picklist ID Units DefaultValue
Values
Enable StateFixed Torque Pulsation Enable State
7315 Disabled ● Disabled● Alarm● LatchedAlarm● Trip
DescriptionTorque producing current and motor flux associated with motor operation allows for the calculation of motor torque as the product of torque producing current (iqs) and the machine magnetic flux (λs). The torque producing current is the component of machine current that is in phase with the machine voltage. A given machine has a maximum rated value of torque producing current that combines with any flux producing current to form the overall rated stator
Advanced Motor Protection and RTD Protection Functions6.10 Device 39 - Mechanical Condition Monitor - Fixed Pickup Torque Pulsation
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 51
current. The torque producing current (iqs) is scaled using a per unit system with one per unit iqs equal to the rated value of iqs for the particular machine being used. Similarly, the rated magnetic flux (stator flux) is scaled such that one per unit flux has been achieved when the machine exhibits rated voltage at rated speed.
The per-unit torque is then given by:
perunit qs sT i λ= ×
Figure 6-8 Per Unit Torque
The torque should be steady and continuous but may contain small amounts of amplitude variation over time. Typically, these variations occur over fixed amounts of time and tend to repeat over those fixed amounts of time.
The torque can be resolved into two components, one component being the torque average value and the other being small amplitude variation (or cyclical component) that can be added together to obtain the total torque. Torque pulsation protection focuses on the time duration varying part, specifically the RMS value of the pulsating part of the torque.
The protection calculates RMS torque pulsation by sampling and recording the torque over a specific length time window. The window of time is selectable and should be chosen to be long enough to contain several cycles of torque variation. The window will contain N samples of torque (T(n)). The mean of the dataset is first calculated:
11( )
n
mean
N
T T nN
=
= ∑
Figure 6-9 Mean of Torque Dataset
The mean is subtracted from the torque to obtain only the pulsating part. The RMS value of the remaining pulsating part is calculated:
( )1
21( )
n
rms mean
N
T T n TN
=
= −∑
Figure 6-10 RMS Value of Pulsating Torque
The RMS torque is used as an input to a standard protection block and can be configured in the same manner as other protection functions that are based on the standard protection block diagram.
The maximum response time must be calculated at full speed
.
The Advanced Motor Protection function design for RMS Torque Pulsation is shown below.
Advanced Motor Protection and RTD Protection Functions6.10 Device 39 - Mechanical Condition Monitor - Fixed Pickup Torque Pulsation
Advanced Motor Protection for Variable Speed Operation52 Manual, AA, A5E46373908A
Pickup
Timed
Out
Dropout
Timed
Out
Dropout
Level
Output
Latching
Control
1 = Latched
Time
Constant
Reset
Low Pass
Filter Reset
Reset
Trip or
Alarm
Output
Zero
Count
Enable
Zero
Output
Dropout
Time Delay
Pickup
Time Delay
Output
Count
Enable
Dropout
Time Delay
(Counter)
Pickup
Time Delay
(Counter)
Time
Constant
1 = Enable
0 = Disable
1 = pickup0 = dropout
RMS Torque
Pulsa!on
Pickup
Level
Low Pass
Filter
>=
>=
+
-Σ
>
Figure 6-11 Torque Pulsation Diagram
Advanced Motor Protection and RTD Protection Functions6.10 Device 39 - Mechanical Condition Monitor - Fixed Pickup Torque Pulsation
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 53
6.11 Device 46_2 - Phase-Balance Current - Fixed Pickup Negative Sequence Overcurrent Delay
OverviewFixed pickup negative sequence overcurrent is used to protect the motor and connected load against operation under conditions of high negative sequence current or phase current imbalance. The fixed pickup negative sequence overcurrent function provides a single negative sequence overcurrent setting that produces a trip or alarm condition when the negative sequence current rises above that value. The function offers an enable that latches once a programmable minimum speed has been reached. The function can also be enabled once a programmable time period has elapsed since the starting of the motor. The per-unit speed protection variable may be derived from a flux based Phase Locked Loop (PLL) or encoder.
NoteEncoder Loss
Depending upon the value of parameter 1320 (encoder loss response), when a loss of the encoder occurs, the drive will either default to the phase locked loop to obtain motor speed information or the drive will stop.
Device 46_2 provides parameter status as shown in table Advanced Motor Protection Menu - Fixed Negative Sequence Overcurrent.
Table 6-9 Advanced Motor Protection Menu - Phase Balance Current - Fixed Negative Sequence Over Current (ID 7316)
Keypad Parameter TextTool Parameter Text
ID Units DefaultValue
Minimum - Maximum Value
Pickup LevelFixed Negative Sequence Overcurrent Pickup Level
7317 % 5 0 - 100
Pickup DelayFixed Negative Sequence Overcurrent De‐lay Pickup Level
7318 sec 1 0 - 180
Dropout LevelFixed Negative Sequence Overcurrent Dropout Level
7319 % 2 0 - 50
Dropout DelayFixed Negative Sequence Overcurrent Dropout Delay
7320 sec 0.1 0 - 180
Low Pass Time ConstFixed Negative Sequence Overcurrent Low Pass Time Constant
7321 msec 0 0 - 1000
Minimum SpeedFixed Negative Sequence Overcurren Min Speed Enable Point
7322 % 20 0 100
Startup TimeFixed Negative Sequence Overcurrent De‐lay from Startup
7323 sec 5 0 - 6000
Advanced Motor Protection and RTD Protection Functions6.11 Device 46_2 - Phase-Balance Current - Fixed Pickup Negative Sequence Overcurrent Delay
Advanced Motor Protection for Variable Speed Operation54 Manual, AA, A5E46373908A
Picklist ID Units DefaultValue
Values
Enable StateFixed Negative Sequence Overcurrent En‐able State
7324 Disabled ● Disabled● Alarm● LatchedAlarm● Trip
DescriptionThe maximum response time with zero delay (pickup counter=0) is 20 milliseconds.
The Advamced Protection function design for Negative Sequence Current is shown below.
Pickup
Timed
Out
Dropout
Timed
Out
Dropout
Level
Output
Latching
Control
1 = Latched
Time
Constant
Reset
Low Pass
Filter Reset
Reset
Trip or
Alarm
Output
Zero
Count
Enable
Zero
Output
Dropout
Time Delay
Pickup
Time Delay
Output
Count
Enable
Dropout
Time Delay
(Counter)
Pickup
Time Delay
(Counter)
Time
Constant
1 = Enable
0 = Disable
1 = pickup0 = dropout
Nega!ve Sequence
Current
Pickup
Level
Low Pass
Filter
>=
>=
+
-Σ
>
Figure 6-12 Negative Sequence Current Diagram
Advanced Motor Protection and RTD Protection Functions6.11 Device 46_2 - Phase-Balance Current - Fixed Pickup Negative Sequence Overcurrent Delay
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 55
6.12 Device 48 - Incomplete Sequence Relay Device - Maximum Start TimeOverviewMaximum start time protects the motor against excessive time between starting and reaching a desired speed. The function produces a trip or alarm condition when the machine fails to reach an adjustable speed threshold in an adjustable time period following a start. The per-unit speed protection variable may be derived from a flux based Phase Locked Loop (PLL) or encoder.
NoteEncoder Loss
Depending upon the value of parameter 1320 (encoder loss response), when a loss of the encoder occurs, the drive will either default to the phase locked loop to obtain motor speed information or the drive will stop.
Device 48 provides parameter status as shown in table Advanced Motor Protection Menu - Maximum Start Time.
Table 6-10 Advanced Motor Protection Menu - Incomplete Sequence - Maximum Start Time (ID 7325)
Keypad Parameter TextTool Parameter Text
ID Units DefaultValue
Minimum - Maximum Value
Maximum Start Time Incomplete Sequence Maximum Start Time Starting Time
7326 sec 10 0 - 180
Minimum SpeedIncomplete Sequence Maximum Start Time Minimum Speed
7327 % 50 0 - 200
Low Pass Time ConstIncomplete Sequence Maximum Start Time Low Pass Time Constant
7328 msec 0 0 - 1000
Picklist ID Units DefaultValue
Values
Enable StateMaximum Start Time Enable State
7329 Disabled ● Disabled● Alarm● LatchedAlarm● Trip
The maximum response time with zero delay (pickup counter=0) is 50 milliseconds.
Advanced Motor Protection and RTD Protection Functions6.12 Device 48 - Incomplete Sequence Relay Device - Maximum Start Time
Advanced Motor Protection for Variable Speed Operation56 Manual, AA, A5E46373908A
6.13 Device 48 - Incomplete Sequence Relay Device - Maximum Stop TimeOverviewMaximum stop time protects the motor against excessive time between the stop command and dropping down to a desired speed. The function produces a trip or alarm condition when the machine fails to reach an adjustable speed threshold in an adjustable time period following a stop. The per-unit speed protection variable may be derived from a flux based Phase Locked Loop (PLL) or encoder.
NoteEncoder Loss
Depending upon the value of parameter 1320 (encoder loss response), when a loss of the encoder occurs, the drive will either default to the phase locked loop to obtain motor speed information or the drive will stop.
Device 48 provides parameter status as shown in table Advanced Motor Protection Menu - Incomplete Sequence - Maximum Stop Time
Table 6-11 Advanced Motor Protection Menu - Incomplete Sequence - Maximum Stop Time (ID 7330)
Keypad Parameter TextTool Parameter Text
ID Units DefaultValue
Minimum - Maximum Value
Maximum Stop Time Incomplete Sequence Maximum Stop Time Stopping Time
7331 sec 10 0 - 180
Maximum SpeedIncomplete Sequence Maximum Stop Time Maximum Speed
7332 % 5 0 - 100
Low Pass Time ConstIncomplete Sequence Maximum Stop Time Low Pass Time Constant
7333 msec 0 0 - 1000
Picklist ID Units DefaultValue
Values
Enable StateMaximum Stop Time Enable State
7334 ● Disabled● Alarm● LatchedAlarm● Trip
The maximum response time with zero delay (pickup counter=0) is 50 milliseconds.
Advanced Motor Protection and RTD Protection Functions6.13 Device 48 - Incomplete Sequence Relay Device - Maximum Stop Time
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 57
6.14 Device 49T - Machine Thermal Model - Fixed Parameter Thermal Overload
OverviewThe fixed parameter thermal overload function uses a first order differential equation to track the amount of thermal capacity used in the machine as described in IEC 60255-149. Thermal capacity is used up as the machine temperatures approach maximum rated or allowable conditions. An equivalent heating current is calculated that takes into account the RMS phase currents of the machine as well as the amount of negative sequence current. The heat input to the machine is determined based on the square of the equivalent heating current divided by an adjustable rated current. The thermal capacity is adjusted based on thermal time constants for heating, cooling, or stopped conditions in the machine in accordance with a first order differential equation that accounts for heat inputs and heat outputs in the machine. The fixed parameter function uses single values of rated current, heating time constant, and cooling time constant. An adjustable threshold can be set to limit the maximum amount of thermal capacity used. The function reports a trip or alarm condition or can block starting of the motor when the thermal capacity used exceeds the programmed value. The thermal model of the machine can be biased by RTD measurements of ambient temperature and/or stator temperature. Ambient RTD readings are used to compensate for the effects of an ambient temperature other than rated, stator RTD readings are used to set minimum thermal capacity used values based on the stator temperature.
Device 49T provides parameter status as shown in table Advanced Motor Protection Menu - Machine Thermal Model - Fixed Parameter Thermal Overload.
Table 6-12 Advanced Motor Protection Menu - Machine Thermal Model - Fixed Parameter Thermal Overload (ID 7335)
Keypad Parameter TextTool Parameter Text
ID Units DefaultValue
Minimum - Maximum Value
Alarm Pickup Level 7336 % 80 0 - 150Trip Pickup Level 7337 % 100 0 - 150Heating Time Constant 7338 min 15 1 - 1000Cooling Time Constant 7339 min 15 1 - 1000Stopped Time Constant 7340 min 30 1 - 1000Curve k-factor 7341 1.15 1 - 1.5Negative Seq q-Factor 7342 4 0 - 15Tmax 7345 ° 180 50 - 572Tlimit 7346 ° 40 25 - 212Tmaxoper 7347 ° 130 50 -572HCSR 7348 1 0.1 - 1
Picklist ID Units DefaultValue
Values
Use Ambient RTDs 7343 No Ambient ● No Ambient● Use Ambient
Use Stator RTDs 7344 No Stator ● No Stator● Use Stator
Advanced Motor Protection and RTD Protection Functions6.14 Device 49T - Machine Thermal Model - Fixed Parameter Thermal Overload
Advanced Motor Protection for Variable Speed Operation58 Manual, AA, A5E46373908A
Picklist ID Units DefaultValue
Values
Enable State Out1Fixed Parameter Thermal Overload Ena‐ble State
7350 Disabled ● Disabled● Alarm● LatchedAlarm● Trip● Block Start
Enable State Out2Fixed Parameter Thermal Overload Ena‐ble State
7351 Disabled ● Disabled● Alarm● LatchedAlarm● Trip● Block Start
Fixed Thermal Overload is mutually exclusive with Variable Thermal Overload.
Discussion of Fixed Parameter Thermal Overload Protection ModelThe thermal overload function uses a differential equation model to predict the amount of thermal capacity used. The equation calculates H(t), an H(t) value of 1.0 indicates that 100% of the thermal capacity of the machine has been used and basically that the machine is at the maximum allowable temperature.
The differential equation is given by:
( )( )
( )
2
eq
a
i t tH t F H t t
k t t
τ
τ τ
∆= + − ∆
+ ∆ + ∆
One of the inputs to the equation is ieq(t) is the equivalent heating current expressed in per unit. One per unit current in this context is equal to the rated current of the machine being protected. Both H(t) and ieq(t) are functions of time while the other variables in the equation are fixed (although adjustable) parameters.
The equivalent heating current is a function of the RMS value of the stator current and the negative sequence stator current. ieq(t) is given by:
i i qieq avg qi
= +2 2
Where:
ii i i
avgarms brms crms
=+ +
3
The equivalent current is a function of the average RMS stator current plus a term related to the negative sequence current i2. The q factor weights the negative sequence current in the calculation of the equivalent heating current ieq. The q factor should be adjusted to account for the additional heating effects of negative sequence current and in many cases of induction machines should be chosen to be equal to the ratio of negative sequence rotor resistance to the positive sequence rotor resistance.
Advanced Motor Protection and RTD Protection Functions6.14 Device 49T - Machine Thermal Model - Fixed Parameter Thermal Overload
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 59
Another parameter of the equation is the k-Factor which effectively scales the current, irated. The k factor is indicative of the amount of additional thermal capacity in the machine beyond operation at rated current in the rated ambient temperature environment. A k factor of greater than one implies that additional thermal capacity exists under rated operating conditions. Tau (τ) is the time constant which determines how fast changes in equivalent stator current affect the amount of thermal capacity used. The time constant is selected by the model depending on rather the machine is cooling, heating, or stopped. Delta t (Δt) is the sampling interval used to calculate the differential (difference) equation. The sampling time is set by the drive configuration and is on the order of a few milliseconds. The Fa term is used to account for operation in ambient temperatures other than the maximum rated ambient temperature. The Fa term is set equal to one unless RTD sensors are used to provide a measured ambient temperature. A more detailed discussion of the effect of Fa will be given later when the effects of RTD usage are presented. The time constant determines how quickly changes in effective current result in changes in the amount of thermal capacity used. A steady equivalent current will eventually drive the thermal capacity used to a steady state value.
The steady state value of H(t) is given by:
Hi
kF
steady state
eq
a− =
2
In the case where ambient temperature RTD(s) are not being used then the steady state equation becomes:
Hi
ksteady state
eq
− =
2
It can be seen that when the per unit (PU) equivalent stator current is equal to the k-Factor, then the thermal capacity used will eventually reach 100%. Note that H is scaled such that an H value of 1 corresponds to 100%.
The time constants determine how fast the thermal capacity changes in response to a change in the equivalent current ieq. There are three time constants that apply during different operating modes of the machine. The stopped time constant is used when the machine is stopped. The heating and cooling time constants are used when the machine is running. The heating time constant is used when the thermal capacity used is increasing and the cooling time constant is used when the thermal capacity used is falling.
Use of RTD(s) in the Thermal Overload Protection ModelRTDs that affect the thermal model are assigned to group names of either stator or ambient in the parameter menus for the particular RTD. The hottest RTD in each group is selected and the ambient or stator temperature is determined by that reading. The usage of ambient and/or stator temperature RTD readings in the thermal overload protection model is controlled by the model parameters named "Use Ambient RTDs" or "Use Stator RTDs". Either or both may be selected for use in the thermal model.
The ambient RTD group temperature affects the value of Fa as defined in the equation for Fa shown below.
Advanced Motor Protection and RTD Protection Functions6.14 Device 49T - Machine Thermal Model - Fixed Parameter Thermal Overload
Advanced Motor Protection for Variable Speed Operation60 Manual, AA, A5E46373908A
FT T
T Ta
it
a
=−−
max lim
max
Tlimit is the maximum ambient temperature in which the machine is rated to operate. Ta is the actual value of ambient temperature as measured by the RTD(s) assigned to the "ambient" group. Ta is set equal to Tlimit in the case where no ambient temperature measurement is provided making the value of Fa equal to one. Tmax is the maximum operating temperature of the stator winding. As equation 4 shows, the value of Fa basically scales the steady state value of the amount of thermal capacity used. A high value of ambient temperature will increase the amount of steady state thermal capacity used while a low value of ambient temperature will decrease it. An ambient temperature in excess of Tmax will force the thermal capacity used to the saturation value of 500%.
The stator group temperature is used to determine a minimum value of thermal capacity used that is based on the stator temperature reading. The value of thermal capacity used that is predicted by the model is overridden when the value of thermal capacity used as determined by the stator RTD(s) is higher when the "use stator RTDs" parameter is selected such as to use the stator temperature measurement. The thermal capacity used based on the temperature reported by the stator RTD group is shown in "Thermal Capacity used as determined by Stator Temperature".
Thermal Capacity Used
Stator RTD Temperature
%0
(%)
Tlimit Tmaxoper Tmax
(1 – HCSR) x 100%
100%
Advanced Motor Protection and RTD Protection Functions6.14 Device 49T - Machine Thermal Model - Fixed Parameter Thermal Overload
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 61
Figure 6-13 Thermal Capacity used as determined by Stator Temperature
The variables Tlimit and Tmax are the maximum rated ambient temperature and the maximum allowable insulation temperature as earlier defined. The variable Tmaxoper is the operating temperature of the stator at full rated load and at an ambient temperature of Tlimit. The amount of thermal capacity used when the stator temperature is at Tmaxoper is determined based on the hot to cold stall ratio (HCSR) in accordance with the equation below:
H T T HCSRstator oper
=( ) = −( )max1
Note that H is scaled such that a value of H=1 corresponds to 100% thermal capacity used. The hot to cold stall ratio is defined as the ratio of the rated maximum stall time of a machine which has been operating at full rated load in a maximum rated ambient temperature environment for a time period long enough to reach thermal equilibrium to the maximum to the rated maximum stall time of a machine which has stabilized in the same ambient temperature environment without operating.
The value of HCSR will presumably be less than or equal to one since the allowable stall time with a hot stator winding should be less than the allowable stall time with a cold stator winding. For example, if the allowable stall time of a machine is 5 seconds with a cold stator, and 4 seconds with a hot stator, then the HCSR will be equal to 0.8 and the amount of thermal capacity used when the stator RTDs report a temperature equal to Tmaxoper will be 20%. When the stator RTD(s) are enabled, the thermal overload function will report the model predicted value if that value is greater than 20% or the value of 20% obtained from the stator temperature measurement.
Advanced Motor Protection and RTD Protection Functions6.14 Device 49T - Machine Thermal Model - Fixed Parameter Thermal Overload
Advanced Motor Protection for Variable Speed Operation62 Manual, AA, A5E46373908A
6.15 Device 49T - Machine Thermal Model - Variable Parameter Thermal Overload
OverviewThe variable parameter thermal overload function uses a first order differential equation to track the amount of thermal capacity used in the machine as described in IEC 60255-149. Thermal capacity is used up as the machine temperatures approach maximum rated or allowable conditions. An equivalent heating current is calculated that takes into account the RMS phase currents of the machine as well as the amount of negative sequence current. The heat input to the machine is determined based on the square of the equivalent heating current divided by an adjustable rated current. The thermal capacity is adjusted based on thermal time constants for heating, cooling, or stopped conditions in the machine in accordance with a first order differential equation that accounts for heat inputs and heat outputs in the machine. The variable parameter function uses values of rated current, heating time constant, and cooling time constant that are a function of the demand speed. An adjustable threshold can be set to limit the maximum amount of thermal capacity used. The function reports a trip or alarm condition or can block starting of the motor when the thermal capacity used exceeds the programmed value. The thermal model of the machine can be biased by RTD measurements of ambient temperature and/or stator temperature. Ambient RTD readings are used to compensate for the effects of an ambient temperature other than rated, stator RTD readings are used to set minimum thermal capacity used values based on the stator temperature.
Device 49T provides parameter status as shown in table Advanced Motor Protection Menu - Machine Thermal Model - Variable Parameter Thermal Overload
Table 6-13 Advanced Motor Protection Menu - Machine Thermal Model - Variable Thermal Overload (ID 7352)
Keypad Parameter TextTool Parameter Help Text
ID Units DefaultValue
Minimum - Maxium Value
Alarm Pickup LevelVariable Thermal Overload Alarm Pickup Level
7353 % 80 0 - 150
Trip Pickup LevelVariable Thermal Overload Trip Pickup
7354 % 100 1 - 1000
Heating Time ConstantHeating Time Constant
7355 sec 1 - 1000
Cooling Time ConstantCooling Time Constant
7376 sec 1 - 1000
Curve k-factor 7396 0.1 - 1.5Negative Seq q Factor 7419 4 0 - 15Use Ambient RTDs 7420 Use Ambient ● Use Ambient
● No AmbientUse Stator RTDs 7421 Use Stator ● Use Stator
● No StatorTmax 7422 ° 180 50 - 572Tlimit 7423 ° 40 25 - 212
Advanced Motor Protection and RTD Protection Functions6.15 Device 49T - Machine Thermal Model - Variable Parameter Thermal Overload
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 63
Keypad Parameter TextTool Parameter Help Text
ID Units DefaultValue
Minimum - Maxium Value
Tmaxoper 7424 ° 130 50 -572HCSRVariable Parameter Thermal Overload Hot/Cold safe stall time ratio (HCSR) for Motor
7425 1 0.1 - 1
Picklist ID Units DefaultValue
Values
Enable State Out1Fixed Parameter Thermal Overload Enable State
7350 Disabled ● Disabled● Alarm● LatchedAlarm● Trip● Block Start
Enable State Out2Fixed Parameter Thermal Overload Enable State
7351 Disabled ● Disabled● Alarm● LatchedAlarm● Trip● Block Start
The maximum response time with zero delay (pickup counter=0) is 20 milliseconds.
The details of the variable thermal overload function are the same as in the case of the fixed thermal overload function except that three of the model parameters can be varied as a function of the speed command of the drive (% demand). Please refer to the fixed model function, (Device 49T - Machine Thermal Model - Fixed Parameter Thermal Overload (ID 7335), for the specific details and equations of the thermal overload model.
Heating Time Constant Menu (7355)
Keypad Parameter TextTool Parameter Help Text
ID Units DefaultValue
Minimum - Maximum Value
0% Speed HTimeConstDefine Time Constant in Seconds at 0% Speed Demnd
7356 min 30 1 - 1000
0% Speed HT1imeConstDefine Time Constant in Seconds at 10% Speed Demnd
7357 min 28.5 1 - 1000
20% Speed HTimeConstDefine Time Constant in Seconds at 20% Speed Demand
7358 min 27 1 - 1000
30% Speed HTimeConstDefine Time Constant in Seconds at 30% Speed Demand
7359 min 25.5 1 - 1000
40% Speed HTimeConstDefine Time Constant in Seconds at 40% Speed Demand
7360 min 24 1 - 1000
Advanced Motor Protection and RTD Protection Functions6.15 Device 49T - Machine Thermal Model - Variable Parameter Thermal Overload
Advanced Motor Protection for Variable Speed Operation64 Manual, AA, A5E46373908A
Keypad Parameter TextTool Parameter Help Text
ID Units DefaultValue
Minimum - Maximum Value
50% Speed HTimeConstDefine Time Constant in Seconds at 50% Speed Demand
7361 min 22.5 1 - 1000
60% Speed HTimeConstDefine Time Constant in Seconds at 60% Speed Demand
7362 min 21 1 - 1000
70% Speed HTimeConstDefine Time Constant in Seconds at 70% Speed Demand
7363 min 19.5 1 - 1000
80% Speed HTimeConstDefine Time Constant in Seconds at 80% Speed Demand
7364 min 18 1 - 1000
90% Speed HTimeConstDefine Time Constant in Seconds at 90% Speed Demand
7365 min 16.5 1 - 1000
100% Speed HTimeConstDefine Time Constant in Seconds at 100% Speed Demand
7366 min 15 1 - 1000
110% SpeedHTimeConstDefine Time Constant in Seconds at 110% Speed Demand
7367 min 15 1 - 1000
120% SpeedHTimeConstDefine Time Constant in Seconds at 120% Speed Demand
7368 min 15 1 - 1000
130% SpeedHTimeConst Define Time Constant in Seconds at 130% Speed Demand
7369 min 15 1 - 1000
140% SpeedHTimeConstDefine Time Constant in Seconds at 140% Speed Demand
7370 min 15 1 - 1000
150% SpeedHtimeConstDefine Time Constant in Seconds at 150% Speed Demand
7371 min 15 1 - 1000
160% SpeedHtimeConstDefine Time Constant in Seconds at 160% Speed Demand
7372 min 15 1 - 1000
170% SpeedHtimeConstDefine Time Constant in Seconds at 170% Speed Demand
7373 min 15 1 - 1000
180% SpeedHtimeConstDefine Time Constant in Seconds at 180% Speed Demand
7374 min 15 1 - 1000
190% SpeedHtimeConstDefine Time Constant in Seconds at 190% Speed Demand
7375 min 15 1 - 1000
Advanced Motor Protection and RTD Protection Functions6.15 Device 49T - Machine Thermal Model - Variable Parameter Thermal Overload
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 65
Cooling Time Constant menu (7376)
Keypad Parameter TextTool Parameter Help Text
ID Units DefaultValue
Minimum - Maximum Value
0% Speed CTimeConstDefine Time Constant in Seconds at 0% Speed Demnd
7377 min 30 1 - 1000
0% Speed HT1imeConstDefine Time Constant in Seconds at 10% Speed Demnd
7378 min 28.5 1 - 1000
20% Speed CTimeConstDefine Time Constant in Seconds at 20% Speed Demand
7379 min 27 1 - 1000
30% Speed CTimeConstDefine Time Constant in Seconds at 30% Speed Demand
7380 min 25.5 1 - 1000
40% Speed CTimeConstDefine Time Constant in Seconds at 40% Speed Demand
7381 min 24 1 - 1000
50% Speed CTimeConstDefine Time Constant in Seconds at 50% Speed Demand
7382 min 22.5 1 - 1000
60% Speed CTimeConstDefine Time Constant in Seconds at 60% Speed Demand
7383 min 21 1 - 1000
70% Speed CTimeConstDefine Time Constant in Seconds at 70% Speed Demand
7384 min 19.5 1 - 1000
80% Speed CTimeConstDefine Time Constant in Seconds at 80% Speed Demand
7385 min 18 1 - 1000
90% Speed CTimeConstDefine Time Constant in Seconds at 90% Speed Demand
7386 min 16.5 1 - 1000
100% Speed CTimeConstDefine Time Constant in Seconds at 100% Speed Demand
7387 min 15 1 - 1000
110% SpeedCTimeConstDefine Time Constant in Seconds at 110% Speed Demand
7388 min 15 1 - 1000
120% SpeedCTimeConstDefine Time Constant in Seconds at 120% Speed Demand
7389 min 15 1 - 1000
130% SpeedCTimeConst Define Time Constant in Seconds at 130% Speed Demand
7390 min 15 1 - 1000
140% SpeedCTimeConstDefine Time Constant in Seconds at 140% Speed Demand
7391 min 15 1 - 1000
Advanced Motor Protection and RTD Protection Functions6.15 Device 49T - Machine Thermal Model - Variable Parameter Thermal Overload
Advanced Motor Protection for Variable Speed Operation66 Manual, AA, A5E46373908A
Keypad Parameter TextTool Parameter Help Text
ID Units DefaultValue
Minimum - Maximum Value
150% SpeedCTimeConstDefine Time Constant in Seconds at 150% Speed Demand
7392 min 15 1 - 1000
160% SpeedCTimeConstDefine Time Constant in Seconds at 160% Speed Demand
7393 min 15 1 - 1000
170% SpeedCTimeConstDefine Time Constant in Seconds at 170% Speed Demand
7394 min 15 1 - 1000
180% SpeedCTimeConstDefine Time Constant in Seconds at 180% Speed Demand
7395 min 15 1 - 1000
190% SpeedCTimeConstDefine Time Constant in Seconds at 190% Speed Demand
7396 min 15 1 - 1000
Thermal Overload Protection Model - Curve k-Factor Menu (7398)
Keypad Parameter TextTool Parameter Help Text
ID Units DefaultValue
Minimum - Maximum Value
0% Speed k-FactorDefine Ratio of Max I to Infinite time trip I in Seconds at 0% Speed Demand
7399 0.75 0 - 1.5
10% Speed k-FactorDefine Ratio of Max I to Infinite time trip I in Seconds at 10% Speed Demand
7400 0.79 0 - 1.5
20% Speed k-FactorDefine Ratio of Max I to Infinite time trip I in Seconds at 20% Speed Demand
7401 0.83 0 - 1.5
30% Speed k-FactorDefine Ratio of Max I to Infinite time trip I in Seconds at 30% Speed Demand
7402 0.87 0 - 1.5
40% Speed k-FactorDefine Ratio of Max I to Infinite time trip I in Seconds at 40% Speed Demand
7403 0.91 0 - 1.5
50% Speed k-FactorDefine Ratio of Max I to Infinite time trip I in Seconds at 50% Speed Demand
7404 0.95 0 - 1.5
60% Speed k-FactorDefine Ratio of Max I to Infinite time trip I in Seconds at 60% Speed Demand
7405 0.99 0 - 1.5
70% Speed k-FactorDefine Ratio of Max I to Infinite time trip I in Seconds at 70% Speed Demand
7406 1.02 0 - 1.5
80% Speed k-FactorDefine Ratio of Max I to Infinite time trip I in Seconds at 80% Speed Demand
7407 1.06 0 - 1.5
Advanced Motor Protection and RTD Protection Functions6.15 Device 49T - Machine Thermal Model - Variable Parameter Thermal Overload
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 67
Keypad Parameter TextTool Parameter Help Text
ID Units DefaultValue
Minimum - Maximum Value
90% Speed k-FactorDefine Ratio of Max I to Infinite time trip I in Seconds at 90% Speed Demand
7408 1.15 0 - 1.5
100% Speed k-FactorDefine Ratio of Max I to Infinite time trip I in Seconds at 100% Speed Demand
7409 1.1 0 - 1.5
110% Speed k-FactorDefine Ratio of Max I to Infinite time trip I in Seconds at 110% Speed Demand
7410 1.06 0 - 1.5
120% Speed k-FactorDefine Ratio of Max I to Infinite time trip I in Seconds at 120% Speed Demand
7411 1.02 0 - 1.5
130% Speed k-FactorDefine Ratio of Max I to Infinite time trip I in Seconds at 130% Speed Demand
7412 0.99 0 - 1.5
140% Speed k-FactorDefine Ratio of Max I to Infinite time trip I in Seconds at 140% Speed Demand
7413 0.95 0 - 1.5
150% Speed k-FactorDefine Ratio of Max I to Infinite time trip I in Seconds at 150% Speed Demand
7414 0.91 0 - 1.5
160% Speed k-FactorDefine Ratio of Max I to Infinite time trip I in Seconds at 160% Speed Demand
7415 0.87 0 - 1.5
170% Speed k-FactorDefine Ratio of Max I to Infinite time trip I in Seconds at 170% Speed Demand
7416 0.83 0 - 1.5
180% Speed k-FactorDefine Ratio of Max I to Infinite time trip I in Seconds at 180% Speed Demand
7417 0.79 0 - 1.5
190% Speed k-FactorDefine Ratio of Max I to Infinite time trip I in Seconds at 190% Speed Demand
7418 0.75 0 - 1.5
The k-Factor can be varied as a function of the demand to effectively change the value of current at which the steady state value of the thermal capacity used is equal to 100%. Since losses increase with increasing frequency, the current required to reach rated machine temperature is likely to be lower at high speeds. A reduced k factor at higher demand settings can be used to adjust the steady state value of thermal capacity used to account for such speed effects. Adjustment of the k factor as a function of the speed demand can also be used to account for decreased cooling effects at low speeds in cases where the cooling is diminished at low speeds. Figure " Use of a Variable k-Factor in Variable Thermal Overload Protection Function" shows an example of how to use the 20 parameters to define a k-Factor variation with the demand setting. The values of the parameters are given in Table "Values of the k-Factor Settings". Note that the programmed value at 190% demand is used at all speeds in excess of 190%.
Advanced Motor Protection and RTD Protection Functions6.15 Device 49T - Machine Thermal Model - Variable Parameter Thermal Overload
Advanced Motor Protection for Variable Speed Operation68 Manual, AA, A5E46373908A
k Factor
Speed Demand
k Factor
(%)
250200150100500
1.4
1.2
1
0.8
0.6
0.4
0.2
0
Figure 6-14 Example of Variable Parameter Thermal Overload Protection k-Factor
Table 6-14 Values of the k-Factor Settings
% Demand k-Factor0 0.710 0.820 0.930 140 150 160 170 1.0580 1.190 1.15
100 1.15110 1.1120 1.05130 1140 0.95150 0.9160 0.85170 0.8180 0.75190 0.7
See alsoAMP Data Screen (Page 160)
Advanced Motor Protection and RTD Protection Functions6.15 Device 49T - Machine Thermal Model - Variable Parameter Thermal Overload
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 69
6.16 Device 49RTD - Machine Thermal Overload - Fixed Pickup RTD Protection
OverviewThe RTD function allows the use of up to 12 RTD temperature sensors to provide general overtemperature protection. A fixed temperature pickup level can be assigned to each RTD individually. RTDs can also be assigned to the Stator or Ambient groups for use in either the fixed or variable pickup thermal models. An alarm or trip response to an open or shorted RTD can be selected.
Device 49RTD provides parameter status as shown in table RTD Protection Menu - Machine Thermal Overload - Fixed Pickup RTD Protection.
Table 6-15 RTD Protection Menu - Machine Thermal Overload - Fixed Pickup RTD Protection (ID 7429)
Keypad Parameter TextTool Parameter Help Text
ID Units DefaultValue
Minimum - Maximum Value
Low Pass Time ConstLow Pass Time Constant for RTD Measurement Filtering
7430 msec 0 0 - 1000
RTD 1 MenuRTD 1 Protection Menu
7431 Sub-menu
RTD 2 MenuRTD 2 Protection Menu
7438 Sub-menu
RTD 3 MenuRTD 3 Protection Menu
7445 Sub-menu
RTD 4 MenuRTD 4 Protection Menu
7452 Sub-menu
RTD 5 MenuRTD 5 Protection Menu
7459 Sub-menu
RTD 6 MenuRTD 6 Protection Menu
7466 Sub-menu
RTD 7 MenuRTD 7 Protection Menu
7473 Sub-menu
RTD 8 MenuRTD 8 Protection Menu
7480 Sub-menu
RTD 9 MenuRTD 9 Protection Menu
7487 Sub-menu
RTD 10 MenuRTD 10 Protection Menu
7494 Sub-menu
RTD 11 MenuRTD 11 Protection Menu
7501 Sub-menu
RTD 12 MenuRTD 12 Protection Menu
7508 Sub-menu
Advanced Motor Protection and RTD Protection Functions6.16 Device 49RTD - Machine Thermal Overload - Fixed Pickup RTD Protection
Advanced Motor Protection for Variable Speed Operation70 Manual, AA, A5E46373908A
RTD 1 Menu (7431)
Keypad Parameter TextTool Parameter Help Text
ID Units DefaultValue
Minimum - Maximum Value
RTD 1 Pickup LevelRTD 1 Pickup Level
7433 ● °C● °F
150 °C 0 - 572
RTD 1 Dropout LevelRTD 1 Percentage under Pickup Level for Reset
7434 % 2 0 -50
RTD 1 Pickup DelayRTD 1 Pickup Delay
7435 sec 10 0 -180
RTD 1 Dropout DelayRTD 1 Time to Reset
7436 sec 5 0 - 180
Picklist ID Units DefaultValue
Values
RTD 1 UsageRTD 1 Bearing, Ambient, etc.
7432 None ● Ambient● Stator● Bearing● Other● None
RTD 1 Output TypeRTD 1 Output Type Alarm, Fault, etc.
7437 Disabled ● Disabled● Alarm● LatchedAlarm● Trip● Block Start
RTD 1 Failure ResponseRTD 1 Response to a shorted or open RTD
7712 Alarm ● Alarm● Trip
RTD 2 Menu (7438)
Keypad Parameter TextTool Parameter Help Text
ID Units DefaultValue
Minimum - Maximum Val‐ue
RTD 2 Pickup LevelRTD 2 Pickup Level
7440 ● °C● °F
150 °C 0 - 572
RTD 2 Dropout LevelRTD 2 Percentage under Pickup Level for Reset
7441 % 2 0 -50
RTD 2 Pickup DelayRTD 2 Pickup Delay
7442 sec 10 0 -180
RTD 2 Dropout DelayRTD 2 Time to Reset
7443 sec 5 0 - 180
Advanced Motor Protection and RTD Protection Functions6.16 Device 49RTD - Machine Thermal Overload - Fixed Pickup RTD Protection
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 71
Picklist ID Units DefaultValue
Values
RTD 2 UsageRTD 2 Bearing, Ambient, etc.
7439 None ● Ambient● Stator● Bearing● Other● None
RTD 2 Output TypeRTD 2 Output Type Alarm, Fault, etc.
7444 Disabled ● Disabled● Alarm● LatchedAlarm● Trip● Block Start
RTD 2 Failure ResponseRTD 2 Response to a shorted or open RTD
7713 Alarm ● Alarm● Trip
RTD 3 Menu (7445)
Keypad Parameter TextTool Parameter Help Text
ID Units DefaultValue
Minimum - Maximum Val‐ue
RTD 3 Pickup LevelRTD 3 Pickup Level
7447 ● °C● °F
150 °C 0 - 572
RTD 3 Dropout LevelRTD 3 Percentage under Pickup Level for Reset
7448 % 2 0 -50
RTD 3 Pickup DelayRTD 3 Pickup Delay
7449 sec 10 0 -180
RTD 3 Dropout DelayRTD 3 Time to Reset
7450 sec 5 0 - 180
Picklist ID Units DefaultValue
Values
RTD 3 UsageRTD 3 Bearing, Ambient, etc.
7446 None ● Ambient● Stator● Bearing● Other● None
RTD 3 Output TypeRTD 3 Output Type Alarm, Fault, etc.
7451 Disabled ● Disabled● Alarm● LatchedAlarm● Trip● Block Start
RTD 3 Failure ResponseRTD 3 Response to a shorted or open RTD
7714 Alarm ● Alarm● Trip
Advanced Motor Protection and RTD Protection Functions6.16 Device 49RTD - Machine Thermal Overload - Fixed Pickup RTD Protection
Advanced Motor Protection for Variable Speed Operation72 Manual, AA, A5E46373908A
RTD 4 Menu (7452)
Keypad Parameter TextTool Parameter Help Text
ID Units DefaultValue
Minimum - Maximum Val‐ue
RTD 4 Pickup LevelRTD 4 Pickup Level
7454 ● °C● °F
150 °C 0 - 572
RTD 4 Dropout LevelRTD 4 Percentage under Pickup Level for Reset
7455 % 2 0 -50
RTD 4 Pickup DelayRTD 4 Pickup Delay
7456 sec 10 0 -180
RTD 4 Dropout DelayRTD 4 Time to Reset
7457 sec 5 0 - 180
Picklist ID Units DefaultValue
Values
RTD 4 UsageRTD 24 Bearing, Ambient, etc.
7453 None ● Ambient● Stator● Bearing● Other● None
RTD 4 Output TypeRTD 4 Output Type Alarm, Fault, etc.
7458 Disabled ● Disabled● Alarm● LatchedAlarm● Trip● Block Start
RTD 4 Failure ResponseRTD 4 Response to a shorted or open RTD
7715 Alarm ● Alarm● Trip
RTD 5 Menu (7459)
Keypad Parameter TextTool Parameter Help Text
ID Units DefaultValue
Minimum - Maximum Val‐ue
RTD 5 Pickup LevelRTD 5 Pickup Level
7461 ● °C● °F
150 °C 0 - 572
RTD 5 Dropout LevelRTD 5 Percentage under Pickup Level for Reset
7462 % 2 0 -50
RTD 5 Pickup DelayRTD 5 Pickup Delay
7463 sec 10 0 -180
RTD 5 Dropout DelayRTD 5 Time to Reset
7464 sec 5 0 - 180
Advanced Motor Protection and RTD Protection Functions6.16 Device 49RTD - Machine Thermal Overload - Fixed Pickup RTD Protection
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 73
Picklist ID Units DefaultValue
Values
RTD 5 UsageRTD 5 Bearing, Ambient, etc.
7460 None ● Ambient● Stator● Bearing● Other● None
RTD 5 Output TypeRTD 5 Output Type Alarm, Fault, etc.
7465 Disabled ● Disabled● Alarm● LatchedAlarm● Trip● Block Start
RTD 5 Failure ResponseRTD 5 Response to a shorted or open RTD
7716 Alarm ● Alarm● Trip
RTD 6 Menu (7466)
Keypad Parameter TextTool Parameter Help Text
ID Units DefaultValue
Minimum - Maximum Val‐ue
RTD 6 Pickup LevelRTD 6 Pickup Level
7461 ● °C● °F
150 °C 0 - 572
RTD 6 Dropout LevelRTD 6 Percentage under Pickup Level for Reset
7462 % 2 0 -50
RTD 6 Pickup DelayRTD 6 Pickup Delay
7463 sec 10 0 -180
RTD 6 Dropout DelayRTD 6 Time to Reset
7464 sec 5 0 - 180
Picklist ID Units DefaultValue
Values
RTD 6 Usage 7467 None ● Ambient● Stator● Bearing● Other● None
RTD 6 Output TypeRTD 6 Output Type Alarm, Fault, etc.
7472 Disabled ● Disabled● Alarm● LatchedAlarm● Trip● Block Start
RTD 6 Failure ResponseRTD 6 Response to a shorted or open RTD
7717 Alarm ● Alarm● Trip
Advanced Motor Protection and RTD Protection Functions6.16 Device 49RTD - Machine Thermal Overload - Fixed Pickup RTD Protection
Advanced Motor Protection for Variable Speed Operation74 Manual, AA, A5E46373908A
RTD 7 Menu (7473)
Keypad Parameter TextTool Parameter Help Text
ID Units DefaultValue
Minimum - Maximum Val‐ue
RTD 7 Pickup LevelRTD 7 Pickup Level
7475 ● °C● °F
150 °C 0 - 572
RTD 7 Dropout LevelRTD 7 Percentage under Pickup Level for Reset
7476 % 2 0 -50
RTD 7 Pickup DelayRTD 7 Pickup Delay
7477 sec 10 0 -180
RTD 7 Dropout DelayRTD 7 Time to Reset
7478 sec 5 0 - 180
Picklist ID Units DefaultValue
Values
RTD 7 Usage 7474 None ● Ambient● Stator● Bearing● Other● None
RTD 7 Output TypeRTD 7 Output Type Alarm, Fault, etc.
7479 Disabled ● Disabled● Alarm● LatchedAlarm● Trip● Block Start
RTD 7 Failure ResponseRTD 7 Response to a shorted or open RTD
7718 Alarm ● Alarm● Trip
RTD 8 Menu (7480)
Keypad Parameter TextTool Parameter Help Text
ID Units DefaultValue
Minimum - Maximum Val‐ue
RTD 8 Pickup LevelRTD 8 Pickup Level
7482 ● °C● °F
150 °C 0 - 572
RTD 8 Dropout LevelRTD 8 Percentage under Pickup Level for Reset
7483 % 2 0 -50
RTD 8 Pickup DelayRTD 8 Pickup Delay
7485 sec 10 0 -180
RTD 8 Dropout DelayRTD 8 Time to Reset
7486 sec 5 0 - 180
Advanced Motor Protection and RTD Protection Functions6.16 Device 49RTD - Machine Thermal Overload - Fixed Pickup RTD Protection
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 75
Picklist ID Units DefaultValue
Values
RTD 8 Usage 7481 None ● Ambient● Stator● Bearing● Other● None
RTD 8 Output TypeRTD 8 Output Type Alarm, Fault, etc.
7486 Disabled ● Disabled● Alarm● LatchedAlarm● Trip● Block Start
RTD 8 Failure ResponseRTD 8 Response to a shorted or open RTD
7719 Alarm ● Alarm● Trip
RTD 9 Menu (7487)
Keypad Parameter TextTool Parameter Help Text
ID Units DefaultValue
Minimum - Maximum Val‐ue
RTD 9 Pickup LevelRTD 9 Pickup Level
7489 ● °C● °F
150 °C 0 - 572
RTD 9 Dropout LevelRTD 9 Percentage under Pickup Level for Reset
7490 % 2 0 -50
RTD 9 Pickup DelayRTD 9 Pickup Delay
7491 sec 10 0 -180
RTD 9 Dropout DelayRTD 9 Time to Reset
7492 sec 5 0 - 180
Picklist ID Units DefaultValue
Values
RTD 9 Usage 7488 None ● Ambient● Stator● Bearing● Other● None
RTD 9 Output TypeRTD 9 Output Type Alarm, Fault, etc.
7493 Disabled ● Disabled● Alarm● LatchedAlarm● Trip● Block Start
RTD 9 Failure ResponseRTD 9 Response to a shorted or open RTD
7720 Alarm ● Alarm● Trip
Advanced Motor Protection and RTD Protection Functions6.16 Device 49RTD - Machine Thermal Overload - Fixed Pickup RTD Protection
Advanced Motor Protection for Variable Speed Operation76 Manual, AA, A5E46373908A
RTD 10 Menu (7494)
Keypad Parameter TextTool Parameter Help Text
ID Units DefaultValue
Minimum - Maximum Val‐ue
RTD 10 Pickup LevelRTD 10 Pickup Level
7496 ● °C● °F
150 °C 0 - 572
RTD 10 Dropout LevelRTD 10 Percentage under Pickup Level for Reset
7497 % 2 0 -50
RTD 10 Pickup DelayRTD 10 Pickup Delay
7498 sec 10 0 -180
RTD 10 Dropout DelayRTD 10 Time to Reset
7499 sec 5 0 - 180
Picklist ID Units DefaultValue
Values
RTD 10 Usage 7495 None ● Ambient● Stator● Bearing● Other● None
RTD 10 Output TypeRTD 10 Output Type Alarm, Fault, etc.
7500 Disabled ● Disabled● Alarm● LatchedAlarm● Trip● Block Start
RTD 10 Failure ResponseRTD 10 Response to a shorted or open RTD
7721 Alarm ● Alarm● Trip
RTD 11 Menu (7501)
Keypad Parameter TextTool Parameter Help Text
ID Units DefaultValue
Minimum - Maximum Val‐ue
RTD 11 Pickup LevelRTD 11 Pickup Level
7503 ● °C● °F
150 °C 0 - 572
RTD 11 Dropout LevelRTD 11 Percentage under Pickup Level for Reset
7504 % 2 0 -50
RTD 11 Pickup DelayRTD 11 Pickup Delay
7505 sec 10 0 -180
RTD 11 Dropout DelayRTD 11 Time to Reset
7506 sec 5 0 - 180
Advanced Motor Protection and RTD Protection Functions6.16 Device 49RTD - Machine Thermal Overload - Fixed Pickup RTD Protection
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 77
Picklist ID Units DefaultValue
Values
RTD 11 UsageRTD 11 Bearing, Ambient, etc.
7502 None ● Ambient● Stator● Bearing● Other● None
RTD 11 Output TypeRTD 11 Output Type Alarm, Fault, etc.
7507 Disabled ● Disabled● Alarm● LatchedAlarm● Trip● Block Start
RTD 11 Failure ResponseRTD 11 Response to a shorted or open RTD
7722 Alarm ● Alarm● Trip
RTD 12 Menu (7508)
Keypad Parameter TextTool Parameter Help Text
ID Units DefaultValue
Minimum - Maximum Val‐ue
RTD 12 Pickup LevelRTD 12 Pickup Level
7510 ● °C● °F
150 °C 0 - 572
RTD 12 Dropout LevelRTD 12 Percentage under Pickup Level for Reset
7511 % 2 0 -50
RTD 12 Pickup DelayRTD 12 Pickup Delay
7512 sec 10 0 -180
RTD 12 Dropout DelayRTD 12 Time to Reset
7513 sec 5 0 - 180
Picklist ID Units DefaultValue
Values
RTD 12 UsageRTD 12 Bearing, Ambient, etc.
7509 None ● Ambient● Stator● Bearing● Other● None
RTD 12 Output TypeRTD 12 Output Type Alarm, Fault, etc.
7514 Disabled ● Disabled● Alarm● LatchedAlarm● Trip● Block Start
RTD 12 Failure ResponseRTD 12 Response to a shorted or open RTD
7723 Alarm ● Alarm● Trip
Advanced Motor Protection and RTD Protection Functions6.16 Device 49RTD - Machine Thermal Overload - Fixed Pickup RTD Protection
Advanced Motor Protection for Variable Speed Operation78 Manual, AA, A5E46373908A
The maximum response time with zero delay (pickup counter = 0) is 10 milliseconds for RTDs 1 through 12 is 50 milliseconds.
See alsoAMP Data Screen (Page 160)
RTD Status Screen (Page 164)
Advanced Motor Protection and RTD Protection Functions6.16 Device 49RTD - Machine Thermal Overload - Fixed Pickup RTD Protection
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 79
6.17 Device 50 - Fixed Pickup Instantaneous Overcurrent Device OverviewFixed pickup instantaneous overcurrent is used to protect the motor and connected load very quickly against operation under conditions of high current. The fixed pickup instantaneous overcurrent function provides a single instantaneous overcurrent setting that produces a trip or alarm condition when the current rises above that value. The function can be programmed to produce a trip or an alarm when any one, any two, or all three of the phase currents is above the set point. The function offers an enable that latches once a programmable minimum speed has been reached. The function can also be enabled once a programmable time period has elapsed since the starting of the motor.
NoteEncoder Loss
Depending upon the value of parameter 1320 (encoder loss response), when a loss of the encoder occurs, the drive will either default to the phase locked loop to obtain motor speed information or the drive will stop.
Device 50 provides parameter status as shown in table Advanced Motor Protection Menu - Fixed Pickup Instantaneous Overcurrent.
Table 6-16 Advanced Motor Protection Menu - Fixed Pickup Instantaneous Overcurrent (ID 7515)
Keypad Parameter TextTool Parameter Text
ID Units Default Value Minimum - Maximum Value
Pickup Level 7516 % 100 0 - 190Dropout Level 7518 % 2 0 - 50Low Pass Time Const 7520 msec 0 0 -1000Minimum Speed 7521 % 0 0 -100Startup Time 7522 sec 0 0 - 6000
Picklist ID Units Default Value ValuesEnable State Fixed Pickup Instantaneous Overcurrent Ena‐ble State
7523 Disabled ● Disabled● Alarm● LatchedAlarm● Trip● Block Start
Phase SelectionFixed Pickup Instantaneous Overcurrent Select Phases to Monitor
7710 Any Phase ● Any Phase● Any Two Phases● All Phases
The maximum response time with zero delay (pickup counter=0) is 5 milliseconds.
Advanced Motor Protection and RTD Protection Functions6.17 Device 50 - Fixed Pickup Instantaneous Overcurrent Device
Advanced Motor Protection for Variable Speed Operation80 Manual, AA, A5E46373908A
Pickup
Timed
Out
Dropout
Timed
Out
Dropout
Level
Output
Latching
Control
1 = Latched
Time
Constant
Reset
Low Pass
Filter Reset
Reset
Trip or
Alarm
Output
Zero
Count
Enable
Zero
Output
Dropout
Time Delay
Pickup
Time Delay
Output
Count
Enable
Dropout
Time Delay
(Counter)
Pickup
Time Delay
(Counter)
Time
Constant
1 = Enable
0 = Disable
1 = pickup
0 = dropout
RMS Phase
Current
Pickup
Level
Low Pass
Filter
>=
>=
+
-
Σ >
Figure 6-15 Overcurrent Protection Diagram
Advanced Motor Protection and RTD Protection Functions6.17 Device 50 - Fixed Pickup Instantaneous Overcurrent Device
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 81
6.18 Device 51 - Fixed Inverse Time Overcurrent
6.18.1 Device 51 - Fixed Inverse Time Overcurrent
OverviewFixed pickup inverse time overcurrent is used to protect the motor and connected load against operation under conditions of high current with a trip time that is inversely related to the amount of current. The fixed pickup inverse time overcurrent function provides a single instantaneous overcurrent setting that produces a trip or alarm condition when the chosen inverse time characteristic is met. The function can be programmed to produce a trip or an alarm when any one, any two, or all three of the phase currents has met its inverse time curve. A variety of IEEE, ANSI, IEC, and IAC inverse time curves are selectable as well as a user defined curve function. The function offers an enable that latches once a programmable minimum speed has been reached. The function can also be enabled once a programmable time period has elapsed since the starting of the motor. Flux based PLL or encoder provides per unit speed (absolute value).
NoteEncoder Loss
Depending upon the value of parameter 1320 (encoder loss response), when a loss of the encoder occurs, the drive will either default to the phase locked loop to obtain motor speed information or the drive will stop.
Device 51 provides parameter status as shown in table Advanced Motor Protection Menu - Fixed Pickup Inverse Time Overcurrent.
Table 6-17 Advanced Motor Protection Menu - Fixed Pickup Inverse Time Overcurrent (ID 7533)
Keypad Parameter TextTool Parameter Text
ID Units DefaultValue
Minimum - Maximum Value
Time Dial Multiplier (TDM)Fixed Inverse Time Overcurrent Pickup Level Time Dial Multiplier
7534 1.0 0.01 - 600
Pickup LevelFixed Inverse Time Overcurrent Pickup Level
7536 % 100 0 - 190
Def. Time Pickup DelayFixed Inverse Time Overcurrent Pickup Delay
7517 sec 1 0 - 180
Def. Time Dropout DelayFixed Inverse Time Overcurrent Dropout Delay
7519 sec 1 0 - 180
User Programmed CurveUser Programmed Curve
7538 Sub-menu
Low Pass Time ConstFixed Inverse Time Overcurrent Low Pass Time Const
7559 msec 0 0 - 1000
Minimum Speed 7560 % 0 0 - 100Startup TimeFixed Inverse Time Overcurrent
7561 sec 0 0 - 6000
Advanced Motor Protection and RTD Protection Functions6.18 Device 51 - Fixed Inverse Time Overcurrent
Advanced Motor Protection for Variable Speed Operation82 Manual, AA, A5E46373908A
Picklist ID Units DefaultValue
Values
Reset TypeFixed Inverse Time Overcurrent Pickup Level Reset Type
7535 Timed ● Timed● Instantaneous
Curve TypeSelect Inverse Time Overcurrent Pickup Level
7537 Definite Time ● Definite Time● IEEE Ext Inv● IEEE Very Inv● IEEE Mod Inv● ANSI Ext Inv● ANSI Norm Inv● ANSI Mod Inv● IEC Curve A● IEC Curve B● IEC Curve C● Short Inv● IAC Ext Inv● IAC Very Inv● IAC Norm Inv● IAC Short Inv● I2t● I4t● User Prog
Enable StateFixed Maximum Power Factor Enable State:
7562 Disabled ● Disabled● Alarm● LatchedAlarm● Trip
Selecting User Prog will display the User Programmed Curve Menu (7538) shown below.
User Programmed Curve Menu (7538)
Keypad Parameter TextTool Parameter Help Text
ID Units DefaultValue
Minimum - Maxium Value
0% Speed PickupDefine Time to Trip in Seconds dependent on RMS Current
7539 sec 6000 0 - 6000
10% Speed PickupDefine Time to Trip in Seconds dependent on RMS Current
7540 sec 6000 0 - 6000
20% Speed PickupDefine Time to Trip in Seconds dependent on RMS Current
7542 sec 6000 0 - 6000
Advanced Motor Protection and RTD Protection Functions6.18 Device 51 - Fixed Inverse Time Overcurrent
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 83
Keypad Parameter TextTool Parameter Help Text
ID Units DefaultValue
Minimum - Maxium Value
30% Speed PickupDefine Time to Trip in Seconds dependent on RMS Current
7543 sec 6000 0 - 6000
40% Speed PickupDefine Time to Trip in Seconds dependent on RMS Current
7544 sec 6000 0 - 6000
50% Speed PickupDefine Time to Trip in Seconds dependent on RMS Current
7545 sec 6000 0 - 6000
60% Speed PickupDefine Time to Trip in Seconds dependent on RMS Current
7546 sec 6000 0 - 6000
70% Speed PickupDefine Time to Trip in Seconds dependent on RMS Current
7547 sec 6000 0 - 6000
80% Speed PickupDefine Time to Trip in Seconds dependent on RMS Current
7548 sec 6000 0 - 6000
90% Speed PickupDefine Time to Trip in Seconds dependent on RMS Current
7549 sec 6000 0 - 6000
100% Speed PickupDefine Time to Trip in Seconds dependent on RMS Current
7550 sec 33.1 0 - 6000
110% Speed PickupDefine Time to Trip in Seconds dependent on RMS Current
7551 sec 27.8 0 - 6000
120% Speed PickupDefine Time to Trip in Seconds dependent on RMS Current
7552 sec 23.7 0 - 6000
130% Speed PickupDefine Time to Trip in Seconds dependent on RMS Current
7553 sec 20.4 0 - 6000
140% Speed PickupDefine Time to Trip in Seconds dependent on RMS Current
7554 sec 17.8 0 - 6000
150% Speed PickupDefine Time to Trip in Seconds dependent on RMS Current
7555 sec 15.6 0 - 6000
160% Speed PickupDefine Time to Trip in Seconds dependent on RMS Current
7556 sec 13.8 0 - 6000
170% Speed PickupDefine Time to Trip in Seconds dependent on RMS Current
7557 sec 12.3 0 - 6000
Advanced Motor Protection and RTD Protection Functions6.18 Device 51 - Fixed Inverse Time Overcurrent
Advanced Motor Protection for Variable Speed Operation84 Manual, AA, A5E46373908A
Keypad Parameter TextTool Parameter Help Text
ID Units DefaultValue
Minimum - Maxium Value
180% Speed PickupDefine Time to Trip in Seconds dependent on RMS Current
7556 sec 11.1 0 - 6000
190% Speed PickupDefine Pickup Level in %Speed at 190% Demanded Speed
7558 sec 0 0 - 6000
User Programmed CurveA user defined pickup and dropout time curve may be selected that allows pickup and drop out times to be entered over the range of 0 to 190% per unit current. The pickup level that is set defines the point on the curve that divides between dropout times and pickup times. Pickup and dropout times are linearly interpolated between points except for that the 190% point defines the pickup time for all values above that point. Typically, the VFD cannot measure output currents in excess of 200% and current readings will tend to saturate in the case of currents in excess of that value (this should be verified for the specific VFD in cases where protection may be affected by output current sensor saturation). The pickup or dropout time is assumed to be constant between the closest point to the pickup level and the pickup level itself. Refer to the figure below to view an example of a user programmed curve.
User Programmed OverCurrent Trip Curve
Reset Time Pickup Time
Pickup Level
RMS Current
(seconds)
Trip Time
(%)
= 115%
0 50 100 150 200
0
10
20
30
40
50
60
70
80
Figure 6-16 User Programmed OverCurrent Trip Curve Example
Advanced Motor Protection and RTD Protection Functions6.18 Device 51 - Fixed Inverse Time Overcurrent
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 85
The table shown below contains the parameters used to generate the User Programmed OverCurrent Trip Curve Example diagram.
RMS Current (%) Trip Time (seconds)0 1010 1520 1530 1540 1550 2060 3070 4080 5090 60100 60110 60120 73130 63140 54150 47160 41170 37180 33190 29
The time dial multipler (TDM) affects the actual value of the trip time as well as the curve input data. If the TDM is set to one, then the times in the table will be obtained but the times may also be scaled with a non-unity value of the TDM setting. The reset type must also be set to "timed" for the reset values in the table to apply. With reset type set to "instantaneous", an instantaneous reset will occur when the current falls below the pickup level.
6.18.2 Function 51 IEEE Pickup and Reset
Pickup and Reset Curve Equations and TablesPickup time as a function of current as well as the reset time are shown for IEEE curves as shown in the following paragraphs.
Advanced Motor Protection and RTD Protection Functions6.18 Device 51 - Fixed Inverse Time Overcurrent
Advanced Motor Protection for Variable Speed Operation86 Manual, AA, A5E46373908A
IEEE CurveThe pickup time as a function of current is given by:
Figure 6-17 IEEE Pickup Curve Equation
The reset time is either zero (selectable) or given by:
T TDMdo
reset
I pu
Irms
−
−( )
τ
12
Figure 6-18 IEEE Reset Curve Equation
Table 6-18 IEEE Curve Data Table
IEEE Curve A B p τreset
Extremely Inverse 28.2 0.1217 2.000 29.1Very Inverse 19.61 0.491 2.000 21.6Moderately Inverse 0.0515 0.1140 0.02000 4.85
Each graphic below depicts the IEEE Curve for each curve type using the data given in the IEEE Curve Data Table.
Advanced Motor Protection and RTD Protection Functions6.18 Device 51 - Fixed Inverse Time Overcurrent
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 87
stator current to pickup current ratio
trip
tim
e
(se
co
nd
s)
extremely inverse curve
1 1.5 2 2.5 3 3.5 4 4.5 510
0
101
102
103
IEEE
TDM=1.0
Figure 6-19 IEEE Extremely Inverse Pickup Time
Advanced Motor Protection and RTD Protection Functions6.18 Device 51 - Fixed Inverse Time Overcurrent
Advanced Motor Protection for Variable Speed Operation88 Manual, AA, A5E46373908A
stator current to pickup current ratio
rese
t tim
e
(se
co
nd
s)
extremely inverse reset time
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.910
1
102
103
IEEE
TDM=1.0
Figure 6-20 IEEE Extremely Inverse Reset Time
Advanced Motor Protection and RTD Protection Functions6.18 Device 51 - Fixed Inverse Time Overcurrent
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 89
stator current to pickup current ratio
trip
tim
e
(se
co
nd
s)
very inverse curve
1 1.5 2 2.5 3 3.5 4 4.5 510
0
101
102
IEEE
TDM=1.0
Figure 6-21 IEEE Very Inverse Pickup Time
Advanced Motor Protection and RTD Protection Functions6.18 Device 51 - Fixed Inverse Time Overcurrent
Advanced Motor Protection for Variable Speed Operation90 Manual, AA, A5E46373908A
stator current to pickup current ratio
rese
t tim
e
(se
co
nd
s)
very inverse reset time
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.910
1
102
103
IEEE
TDM=1.0
Figure 6-22 IEEE Very Inverse Reset Time
Advanced Motor Protection and RTD Protection Functions6.18 Device 51 - Fixed Inverse Time Overcurrent
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 91
stator current to pickup current ratio
trip
tim
e
(se
co
nd
s)
moderately inverse curve
1 1.5 2 2.5 3 3.5 4 4.5 510
0
101
102
IEEE
TDM=1.0
Figure 6-23 IEEE Moderately Inverse Pickup Time
Advanced Motor Protection and RTD Protection Functions6.18 Device 51 - Fixed Inverse Time Overcurrent
Advanced Motor Protection for Variable Speed Operation92 Manual, AA, A5E46373908A
stator current to pickup current ratio
rese
t tim
e
(se
co
nd
s)
moderately inverse reset time
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.910
0
101
102
IEEE
TDM=1.0
Figure 6-24 IEEE Moderately Inverse Reset Time
6.18.3 Function 51 ANSI Pickup and Reset
Pickup and Reset Curve Equations and TablesPickup time as a function of current as well as the reset time are shown for ANSI curves as shown in the following paragraphs.
Advanced Motor Protection and RTD Protection Functions6.18 Device 51 - Fixed Inverse Time Overcurrent
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 93
ANSI CurveThe pickup time as a function of current is given by:
Figure 6-25 ANSI Pickup Curve Equation
The reset time is either zero (selectable) or given by:
T TDMdo
reset
I pu
Irms
−
−( )
τ
12
Figure 6-26 ANSI Reset Curve Equation
Table 6-19 ANSI Curve Data Table
ANSI Curve A B C D E τreset
Extremely Inverse(CO-11)
0.0399 0.2294 0.500 3.0094 0.7222 5.67
Very Inverse(CO-9)
0.0615 0.7989 0.3400 - 0.2840 4.0505 3.88
Inverse(CO-8)
0.0274 2.2614 0.3000 - 4.1899 9.1272 5.95
Moderately Inverse(CO-7)
0.1735 0.6791 0.8000 - 0.0800 0.1271 1.08
Advanced Motor Protection and RTD Protection Functions6.18 Device 51 - Fixed Inverse Time Overcurrent
Advanced Motor Protection for Variable Speed Operation94 Manual, AA, A5E46373908A
stator current to pickup current ratio
trip
tim
e
(se
co
nd
s)
extremely inverse curve
1 1.5 2 2.5 3 3.5 4 4.5 510
-1
100
101
102
ANSI
TDM=1.0
Figure 6-27 ANSI Extremely Inverse Pickup Time
Advanced Motor Protection and RTD Protection Functions6.18 Device 51 - Fixed Inverse Time Overcurrent
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 95
stator current to pickup current ratio
rese
t tim
e
(se
co
nd
s)
extremely inverse reset time
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.910
0
101
102
ANSI
TDM=1.0
Figure 6-28 ANSI Extremely Inverse Reset Time
Advanced Motor Protection and RTD Protection Functions6.18 Device 51 - Fixed Inverse Time Overcurrent
Advanced Motor Protection for Variable Speed Operation96 Manual, AA, A5E46373908A
stator current to pickup current ratio
trip
tim
e
(se
co
nd
s)
very inverse curve
1 1.5 2 2.5 3 3.5 4 4.5 5
100
ANSI
TDM=1.0
Figure 6-29 ANSI Very Inverse Pickup Time
Advanced Motor Protection and RTD Protection Functions6.18 Device 51 - Fixed Inverse Time Overcurrent
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 97
stator current to pickup current ratio
rese
t tim
e
(se
co
nd
s)
very inverse reset time
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.910
0
101
102
ANSI
TDM=1.0
Figure 6-30 ANSI Very Inverse Reset Time
Advanced Motor Protection and RTD Protection Functions6.18 Device 51 - Fixed Inverse Time Overcurrent
Advanced Motor Protection for Variable Speed Operation98 Manual, AA, A5E46373908A
stator current to pickup current ratio
trip
tim
e
(se
co
nd
s)
inverse curve
1 1.5 2 2.5 3 3.5 4 4.5 510
-1
100
101
102
ANSI
TDM=1.0
Figure 6-31 ANSI Inverse Pickup Time
Advanced Motor Protection and RTD Protection Functions6.18 Device 51 - Fixed Inverse Time Overcurrent
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 99
stator current to pickup current ratio
rese
t tim
e
(se
co
nd
s)
inverse reset time
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.910
0
101
102
ANSI
TDM=1.0
Figure 6-32 ANSI Inverse Reset Time
Advanced Motor Protection and RTD Protection Functions6.18 Device 51 - Fixed Inverse Time Overcurrent
Advanced Motor Protection for Variable Speed Operation100 Manual, AA, A5E46373908A
trip
tim
e
stator current to pickup current ratio
(se
co
nd
s)
moderately inverse curve
1 1.5 2 2.5 3 3.5 4 4.5 5
100
ANSI
TDM=1.0
Figure 6-33 ANSI Moderately Inverse Pickup Time
Advanced Motor Protection and RTD Protection Functions6.18 Device 51 - Fixed Inverse Time Overcurrent
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 101
stator current to pickup current ratio
rese
t tim
e
(se
co
nd
s)
moderately inverse reset time
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
1.5
2
2.5
3
3.5
4
4.5
5
5.5
ANSI
TDM=1.0
Figure 6-34 ANSI Moderately Inverse Reset Time
6.18.4 Function 51 IAC Pickup and Reset
Pickup and Reset Curve Equations and TablesPickup time as a function of current as well as the reset time are shown for IAC curves as shown in the following paragraphs.
Advanced Motor Protection and RTD Protection Functions6.18 Device 51 - Fixed Inverse Time Overcurrent
Advanced Motor Protection for Variable Speed Operation102 Manual, AA, A5E46373908A
IAC CurveThe pickup time as a function of current is given by:
Figure 6-35 IAC pickup-curve equation
The reset time is either zero (selectable) or given by:
T TDMdo
reset
I pu
Irms
−
−( )
τ
12
Figure 6-36 IAC Reset Curve Equation
Table 6-20 IAC Curve Data Table
IAC Curve A B C D E τreset
Extremely Inverse 0.0040 0.6379 0.6200 1.7873 0.2461 6.008Very Inverse 0.0900 0.7965 0.1000 - 1.2885 7.9586 4.678Inverse 0.2078 0.8630 0.8000 - 0.4180 0 0.990Short Inverse 0.0428 0.0609 0.6200 - 0.0010 0.0221 0.222
Advanced Motor Protection and RTD Protection Functions6.18 Device 51 - Fixed Inverse Time Overcurrent
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 103
stator current to pickup current ratio
trip
tim
e
(se
co
nd
s)
extremely inverse curve
1 1.5 2 2.5 3 3.5 4 4.5 510
-1
100
101
102
IAC
TDM=1.0
Figure 6-37 IAC Extremely Inverse Pickup Time
Advanced Motor Protection and RTD Protection Functions6.18 Device 51 - Fixed Inverse Time Overcurrent
Advanced Motor Protection for Variable Speed Operation104 Manual, AA, A5E46373908A
stator current to pickup current ratio
rese
t tim
e
(se
co
nd
s)
extremely inverse reset time
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.910
0
101
102
IAC
TDM=1.0
Figure 6-38 IAC Extremely Inverse Reset Time
Advanced Motor Protection and RTD Protection Functions6.18 Device 51 - Fixed Inverse Time Overcurrent
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 105
stator current to pickup current ratio
trip
tim
e
(se
co
nd
s)
very inverse curve
1 1.5 2 2.5 3 3.5 4 4.5 5
100
IAC
TDM=1.0
Figure 6-39 IAC Very Inverse Pickup Time
Advanced Motor Protection and RTD Protection Functions6.18 Device 51 - Fixed Inverse Time Overcurrent
Advanced Motor Protection for Variable Speed Operation106 Manual, AA, A5E46373908A
stator current to pickup current ratio
rese
t tim
e
(se
co
nd
s)
very inverse reset time
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.910
0
101
102
IAC
TDM=1.0
Figure 6-40 IAC Very Inverse Reset Time
Advanced Motor Protection and RTD Protection Functions6.18 Device 51 - Fixed Inverse Time Overcurrent
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 107
stator current to pickup current ratio
trip
tim
e
(se
co
nd
s)
inverse curve
1 1.5 2 2.5 3 3.5 4 4.5 5
100
TDM=1.0
IAC
Figure 6-41 IAC Inverse Pickup Time
Advanced Motor Protection and RTD Protection Functions6.18 Device 51 - Fixed Inverse Time Overcurrent
Advanced Motor Protection for Variable Speed Operation108 Manual, AA, A5E46373908A
stator current to pickup current ratio
rese
t tim
e
(se
co
nd
s)
inverse reset time
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
1
1.5
2
2.5
3
3.5
4
4.5
5
IAC
TDM=1.0
Figure 6-42 IAC Inverse Reset Time
Advanced Motor Protection and RTD Protection Functions6.18 Device 51 - Fixed Inverse Time Overcurrent
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 109
stator current to pickup current ratio
trip
tim
e
(se
co
nd
s)
short inverse curve
1 1.5 2 2.5 3 3.5 4 4.5 510
-2
10-1
100
IAC
TDM=1.0
Figure 6-43 IAC Short Inverse Pickup Time
Advanced Motor Protection and RTD Protection Functions6.18 Device 51 - Fixed Inverse Time Overcurrent
Advanced Motor Protection for Variable Speed Operation110 Manual, AA, A5E46373908A
rese
t tim
e
(se
co
nd
s)
short inverse reset time
stator current to pickup current ratio
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
1.1
IAC
TDM=1.0
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
Figure 6-44 IAC Short Inverse Reset Time
6.18.5 Function 51 IEC Pickup and Reset
Pickup and Reset Curve Equations Pickup time as a function of current as well as the reset time are shown for IEC curves as shown in the following paragraphs.
T TDMpu
K
I
I
rms
pu
E=
−1
Figure 6-45 IEC Pickup Curve Equation
T TDMdo
reset
I pu
Irms
−
−( )
τ
1
2
Figure 6-46 IEC Reset Curve Equation
Advanced Motor Protection and RTD Protection Functions6.18 Device 51 - Fixed Inverse Time Overcurrent
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 111
IEC Curve K E τreset
Curve A (Inverse)
0.140 0.020 9.7
Curve B (Very Inverse)
13.500 1.000 43.2
Curve C (Extremely Inverse)
80.000 2.000 58.2
Short Inverse 0.050 0.040 0.500
stator current to pickup current ratio
trip
tim
e
(se
co
nd
s)
inverse curve
1 1.5 2 2.5 3 3.5 4 4.5 510
0
101
102
IEC
TDM=1.0
Figure 6-47 IEC Inverse Pickup Time
Advanced Motor Protection and RTD Protection Functions6.18 Device 51 - Fixed Inverse Time Overcurrent
Advanced Motor Protection for Variable Speed Operation112 Manual, AA, A5E46373908A
stator current to pickup current ratio
rese
t tim
e
(se
co
nd
s)
inverse reset time
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.910
0
101
102
IEC
TDM=1.0
Figure 6-48 IEC Inverse Reset Time
Advanced Motor Protection and RTD Protection Functions6.18 Device 51 - Fixed Inverse Time Overcurrent
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 113
stator current to pickup current ratio
trip
tim
e
(se
co
nd
s)
extremely inverse curve
1 1.5 2 2.5 3 3.5 4 4.5 510
0
101
102
103
IEC
TDM=1.0
Figure 6-49 IEC Extremely Inverse Pickup Time
Advanced Motor Protection and RTD Protection Functions6.18 Device 51 - Fixed Inverse Time Overcurrent
Advanced Motor Protection for Variable Speed Operation114 Manual, AA, A5E46373908A
stator current to pickup current ratio
rese
t tim
e
(se
co
nd
s)
extremely inverse reset time
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.910
1
102
103
IEC
TDM=1.0
Figure 6-50 IEC Extremely Inverse Reset Time
Advanced Motor Protection and RTD Protection Functions6.18 Device 51 - Fixed Inverse Time Overcurrent
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 115
stator current to pickup current ratio
trip
tim
e
(se
co
nd
s)
short inverse curve
1 1.5 2 2.5 3 3.5 4 4.5 510
-1
100
101
102
IEC
TDM=1.0
Figure 6-51 IEC Short Inverse Pickup Time
Advanced Motor Protection and RTD Protection Functions6.18 Device 51 - Fixed Inverse Time Overcurrent
Advanced Motor Protection for Variable Speed Operation116 Manual, AA, A5E46373908A
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
stator current to pickup current ratio
rese
t tim
e
(se
co
nd
s)
short inverse reset time
0.6
0.8
1
1.2
1.4
1.6
1.8
2
2.2
2.4
2.6
IEC
TDM=1.0
Figure 6-52 IEC Short Inverse Reset Time
Advanced Motor Protection and RTD Protection Functions6.18 Device 51 - Fixed Inverse Time Overcurrent
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 117
stator current to pickup current ratio
trip
tim
e
(se
co
nd
s)
very inverse curve
1 1.5 2 2.5 3 3.5 4 4.5 510
0
101
102
103
IEC
TDM=1.0
Figure 6-53 IEC Very Inverse Pickup Time
Advanced Motor Protection and RTD Protection Functions6.18 Device 51 - Fixed Inverse Time Overcurrent
Advanced Motor Protection for Variable Speed Operation118 Manual, AA, A5E46373908A
stator current to pickup current ratio
rese
t tim
e
(se
co
nd
s)
very inverse reset time
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.910
1
102
103
IEC
TDM=1.0
Figure 6-54 IEC Very Inverse Reset Time
6.18.6 Function 51 I2T Pickup and Reset
Pickup and Reset Curve Equations and TablesPickup time as a function of current as well as the reset time are shown below for I2t
Figure 6-55 I2t Pickup Time Equation
Advanced Motor Protection and RTD Protection Functions6.18 Device 51 - Fixed Inverse Time Overcurrent
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 119
T TDMdo I
I
pu
rms
=
1002
Figure 6-56 I2t Reset Time Equation
stator current to pickup current ratio
trip
tim
e
(se
co
nd
s)
inverse curve
1 1.5 2 2.5 3 3.5 4 4.5 510
0
101
102
I2
t
TDM=1.0
Figure 6-57 I2t Inverse Pickup Time
Advanced Motor Protection and RTD Protection Functions6.18 Device 51 - Fixed Inverse Time Overcurrent
Advanced Motor Protection for Variable Speed Operation120 Manual, AA, A5E46373908A
rese
t tim
e
(se
co
nd
s)
inverse reset time
stator current to pickup current ratio
100
150
200
250
300
350
400
450
500
I2
t
TDM=1.0
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
Figure 6-58 I2t Inverse Reset Time
6.18.7 Function 51 I4T Pickup and Reset
Pickup and Reset Curve Equations and TablesPickup time as a function of current as well as the reset time are shown for I4t curves as shown below.
I4t CurveThe pickup time as a function of current is given by:
T TDMpu
I
I
rms
pu
=
1004
Figure 6-59 I4t Pickup Time equation
Advanced Motor Protection and RTD Protection Functions6.18 Device 51 - Fixed Inverse Time Overcurrent
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 121
The reset time is either zero (selectable) or given by:
T TDMdo I
I
pu
rms
=
1004
Figure 6-60 I4t Reset Time equation
Each graphic below depicts the I4t for each curve type .
stator current to pickup current ratio
trip
tim
e
(se
co
nd
s)
inverse curve
1 1.5 2 2.5 3 3.5 4 4.5 510
-1
100
101
102
I4
t
TDM=1.0
Figure 6-61 I4t Inverse Pickup
Advanced Motor Protection and RTD Protection Functions6.18 Device 51 - Fixed Inverse Time Overcurrent
Advanced Motor Protection for Variable Speed Operation122 Manual, AA, A5E46373908A
rese
t tim
e
(se
co
nd
s)
inverse reset time
stator current to pickup current ratio
I4
t
TDM=1.0
100
120
140
160
180
200
220
240
260
280
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
Figure 6-62 I4t Inverse Reset
Advanced Motor Protection and RTD Protection Functions6.18 Device 51 - Fixed Inverse Time Overcurrent
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 123
6.19 Device 55 - Fixed Pickup Maximum Power FactorOverviewFixed pickup maximum power factor is used to protect the motor against operation under conditions of high power factor that would indicate abnormal conditions in the machine. The fixed pickup maximum power factor function provides a single maximum power factor setting that produces a trip or alarm condition when the power factor. The function can be enabled when the speed demand is above a programmable level. The function can also be enabled once a programmable time period has elapsed since the starting of the motor.
NoteEncoder Loss
Depending upon the value of parameter 1320 (encoder loss response), when a loss of the encoder occurs, the drive will either default to the phase locked loop to obtain motor speed information or the drive will stop.
Device 55 provides parameter status as shown in table Advanced Motor Protection Menu - Fixed Pickup Maximum Power Factor
Table 6-21 Advanced Motor Protection Menu - Fixed Pickup Maximum Power Factor (ID 7573)
Keypad Parameter TextTool Parameter Text
ID Units Default Value Minimum - Maximum Value
Pickup LevelFixed Maximum Power Factor Pickup Level
7573 0.95 0.01 - 1
Pickup DelayFixed Maximum Power Factor Pickup Delay
7574 sec 1 0 - 6000
Dropout LevelFixed Maximum Power Factor Dropout Level
7575 % 2 0 - 50
Dropout DelayFixed Maximum Power Factor Dropout Delay
7576 sec 0.1 0 - 6000
Low Pass Time ConstantFixed Maximum Power Factor Low Pass Time Constant
7577 msec 0 0 - 1000
Minimum SpeedFixed Maximum Power Factor Minimum Speed Enable Point
7578 % 10 0 - 100
Startup TimeFixed Maximum Power Factor Delay from Startup
7579 sec 5 0 - 6000
Advanced Motor Protection and RTD Protection Functions6.19 Device 55 - Fixed Pickup Maximum Power Factor
Advanced Motor Protection for Variable Speed Operation124 Manual, AA, A5E46373908A
Picklist ID Units Default Value ValuesEnable StateFixed Maximum Power Factor Enable State:
7580 Disabled ● Disabled● Alarm● LatchedAlarm● Trip● Block Start
The maximum response time with zero delay (pickup counter=0) is 20 milliseconds.
Pickup
Timed
Out
Dropout
Timed
Out
Dropout
Level
Output
Latching
Control
1 = Latched
Time
Constant
Reset
Low Pass
Filter Reset
Reset
Trip or
Alarm
Output
Zero
Count
Enable
Zero
Output
Dropout
Time Delay
Pickup
Time Delay
Output
Count
Enable
Dropout
Time Delay
(Counter)
Pickup
Time Delay
(Counter)
Time
Constant
1 = Enable
0 = Disable
1 = pickup
0 = dropout
Motor Power
Factor
Pickup
Level
Low Pass
Filter
>=
>=
+
-
Σ >
Figure 6-63 OverPF Protection Diagram
Advanced Motor Protection and RTD Protection Functions6.19 Device 55 - Fixed Pickup Maximum Power Factor
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 125
6.20 Device 55 - Power Factor Relay Device (Fixed minimum power factor)OverviewFixed pickup minimum power factor is used to protect the motor against operation under conditions of low power factor that would indicate abnormal conditions in the machine. The fixed pickup minimum power factor function provides a single minimum power factor setting that produces a trip or alarm condition when the power factor. The function can be enabled when the speed demand is above a programmable level. The function can also be enabled once a programmable time period has elapsed since the starting of the motor.
NoteEncoder Loss
Depending upon the value of parameter 1320 (encoder loss response), when a loss of the encoder occurs, the drive will either default to the phase locked loop to obtain motor speed information or the drive will stop.
Device 55 provides parameter status as shown in table Advanced Motor Protection Menu - Fixed Pickup Minimum Power Factor.
Table 6-22 Advanced Motor Protection Menu - Fixed Pickup Minimum Power Factor (ID 7582)
Keypad Parameter TextTool Parameter Text
ID Units Default Value Minimum - Maximum Value
Pickup LevelFixed Minimum Power Factor Pickup Level
7582 0.5 0.01 - 1
Pickup DelayFixed Minimum Power Factor Pickup Delay
7583 sec 1 0 - 6000
Dropout LevelFixed Minimum Power Factor Dropout Level
7584 % 102 100 - 200
Dropout DelayFixed Minimum Power Factor Dropout Delay
7585 sec 0.1 0 - 6000
Low Pass Time ConstantFixed Minimum Power Factor Low Pass Time Constant
7586 msec 0 0 - 1000
Minimum SpeedFixed Minimum Power Factor Minimum Speed Enable Point
7587 % 10 0 - 100
Startup TimeFixed Minimum Power Factor Delay from Startup
7588 sec 5 0 - 6000
Advanced Motor Protection and RTD Protection Functions6.20 Device 55 - Power Factor Relay Device (Fixed minimum power factor)
Advanced Motor Protection for Variable Speed Operation126 Manual, AA, A5E46373908A
Picklist ID Units Default Value ValuesEnable StateFixed Minimum Power Factor Enable State:
7589 Disabled ● Disabled● Alarm● LatchedAlarm● Trip● Block Start
The maximum response time with zero delay (pickup counter=0) is 20 milliseconds.
Pickup
Timed
Out
Dropout
Timed
Out
1 - Dropout
Level
Output
Latching
Control
1 = Latched
Time
Constant
Reset
Low Pass
Filter Reset
Reset
Trip or
Alarm
Output
Zero
Count
Enable
Zero
Output
Dropout
Time Delay
Pickup
Time Delay
Output
Count
Enable
Dropout
Time Delay
(Counter)
Pickup
Time Delay
(Counter)
Time
Constant
1 = Enable
0 = Disable
1 = pickup
0 = dropout
Motor Power
Factor
Pickup
Level
Low Pass
Filter
>=
>=
+
-
Σ <
Figure 6-64 UnderPF Protection Diagram
Advanced Motor Protection and RTD Protection Functions6.20 Device 55 - Power Factor Relay Device (Fixed minimum power factor)
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 127
6.21 Device 59G - Fixed Pickup Instantaneous Zero Sequence Overvoltage
OverviewFixed pickup instantaneous zero sequence overvoltage is used to protect the motor very quickly under conditions of high zero sequence voltage which could be caused by high phase to ground leakage or a ground fault. The fixed pickup zero sequence overvoltage function provides a single zero sequence overvoltage setting that produces a trip or alarm condition when the zero sequence voltage rises above that value. The function offers an enable that latches once a programmable minimum speed has been reached. The function can also be enabled once a programmable time period has elapsed since the starting of the motor.
Note
The zero-sequence voltage uses a per unit system based on the rated line to neutral voltage of the machine. A 100% zero sequence voltage will occur when the RMS value of the average of the three phase voltages with respect to earth ground is equal to the rated machine voltage (given as a line-to-line voltage) divided by the square root of 3.
NoteEncoder Loss
Depending upon the value of parameter 1320 (encoder loss response), when a loss of the encoder occurs, the drive will either default to the phase locked loop to obtain motor speed information or the drive will stop.
Device 59G provides parameter status as shown in table Advanced Motor Protection Menu - Fixed Pickup Instantaneous Zero Sequence Overvoltage
Table 6-23 Advanced Motor Protection Menu - Fixed Pickup Instantaneous Zero Sequence Overvoltage (ID 7563)
Keypad Parameter TextTool Parameter Text
ID Units DefaultValue
Minimum - Maxium Value
Pickup LevelFixed Pickup Instantaneous Zero Sequence Overvolt‐age Pickup Level
7564 % 5 0 - 175
Dropout LevelFixed Pickup Instantaneous Zero Sequence Overvolt‐age Dropout Level
7566 % 2 0 - 50
Dropout DelayFixed Pickup Instantaneous Zero Sequence Overvolt‐age Dropout Delay
7567 % 0.1 0 - 6000
Low Pass Time ConstFixed Pickup Instantaneous Zero Sequence Overvolt‐age Low Pass Time Constant
7568 sec 0 0 - 1000
Minimum SpeedFixed Pickup Instantaneous Zero Sequence Overvolt‐age Minimum Speed Enable Point
7569 msec 0 0 -100
Startup TimeFixed Pickup Instantaneous Zero Sequence Overvolt‐age Delay from Startup
7570 % 0 0 - 6000
Advanced Motor Protection and RTD Protection Functions6.21 Device 59G - Fixed Pickup Instantaneous Zero Sequence Overvoltage
Advanced Motor Protection for Variable Speed Operation128 Manual, AA, A5E46373908A
Picklist ID Units DefaultValue
Values
Enable StateFixed High Frequency Rate of Change w/ Min Speed Enable Min Speed Enable Point
7571 Disabled ● Disabled● Alarm● LatchedAlarm● Trip
The maximum response time with zero delay (pickup counter = 0) is 5 ms. The maxium pickup time is zero.
Pickup
Timed
Out
Dropout
Timed
Out
Dropout
Level
Output
Latching
Control
1 = Latched
Time
Constant
Reset
Low Pass
Filter Reset
Reset
Trip or
Alarm
Output
Zero
Count
Enable
Zero
Output
Dropout
Time Delay
Pickup
Time Delay
Output
Count
Enable
Dropout
Time Delay
(Counter)
Pickup
Time Delay
(Counter)
Time
Constant
1 = Enable
0 = Disable
1 = pickup
0 = dropout
Zero Sequence
Voltage
Pickup
Level
Low Pass
Filter
>=
>=
+
-
Σ >
Figure 6-65 OverZeroSeqVoltage Protection Diagram
NoteOverZeroSeqVoltage Protection Diagram
Fixed Pickup Instanteous Zero Sequence Overvoltage and fixed Pickup Definite Minimum Time Sequence Overvoltage use the same diagram. To provide clarity to the end-user, the titles are repeated so that the graph is adjacent to the text description of the function. This method of description is applied consistently throught this manual.
Advanced Motor Protection and RTD Protection Functions6.21 Device 59G - Fixed Pickup Instantaneous Zero Sequence Overvoltage
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 129
6.22 Device 59G - Fixed Pickup Definite Minimum Time Zero Sequence Overvoltage
OverviewFixed pickup definite minimum time zero sequence overvoltage is used to protect the motor against sustained operation under conditions of high zero sequence voltage which could be caused by high phase to ground leakage or a ground fault. The fixed pickup zero sequence overvoltage function provides a single zero sequence overvoltage setting that produces a trip or alarm condition when the zero sequence voltage rises above that value. The function offers an enable that latches once a programmable minimum speed has been reached. The function can also be enabled once a programmable time period has elapsed since the starting of the motor.
Note
The zero-sequence voltage uses a per unit system based on the rated line to neutral voltage of the machine. A 100% zero sequence voltage will occur when the RMS value of the average of the three phase voltages with respect to earth ground is equal to the rated machine voltage (given as a line-to-line voltage) divided by the square root of 3.
NoteEncoder Loss
Depending upon the value of parameter 1320 (encoder loss response), when a loss of the encoder occurs, the drive will either default to the phase locked loop to obtain motor speed information or the drive will stop.
Device 59G provides parameter status as shown in table Advanced Motor Protection Menu - Fixed Pickup Definite Minimum Time Zero Sequence Overvoltage.
Table 6-24 Advanced Motor Protection Menu - Fixed Pickup Instantaneous Overcurrent (ID 7524)
Keypad Parameter TextTool Parameter Text
ID Units DefaultValue
Minimum - Maxium Value
Pickup LevelFixed Instantaneous Zero Sequence OverVolt Pick‐up Level
7525 % 100 0 - 190
Pickup DelayFixed Instantaneous Zero Sequence OverVolt Pick‐up Delay
7526 sec 0 - 1 0 - 6000
Dropout LevelFixed Instantaneous Zero Sequence OverVolt Dropout Level
7527 % 2 0 - 50
Dropout DelayFixed Instantaneous Zero Sequence OverVolt Dropout Delay
7528 sec 0 - 1 0 - 6000
Low Pass Time ConstFixed Instantaneous Zero Sequence OverVolt Low Pass Time Const
7529 msec 0 0 -1000
Advanced Motor Protection and RTD Protection Functions6.22 Device 59G - Fixed Pickup Definite Minimum Time Zero Sequence Overvoltage
Advanced Motor Protection for Variable Speed Operation130 Manual, AA, A5E46373908A
Keypad Parameter TextTool Parameter Text
ID Units DefaultValue
Minimum - Maxium Value
Minimum SpeedFixed Instantaneous Zero Sequence OverVolt Ena‐ble State
7530 % 0 0 -100
Startup TimeFixed Instantaneous Zero Sequence OverVolt De‐lay from Startup
7531 sec 0 0 - 6000
Picklist ID Units DefaultValue
Values
Enable State Fixed Pickup Instantaneous Zero Sequence Over‐Volt Enable State
7532 Disabled ● Disabled● Alarm● LatchedAlarm● Trip
The maximum response time with zero delay (pickup counter = 0) is 10 ms. The maximum pickup time is zero.
Pickup
Timed
Out
Dropout
Timed
Out
Dropout
Level
Output
Latching
Control
1 = Latched
Time
Constant
Reset
Low Pass
Filter Reset
Reset
Trip or
Alarm
Output
Zero
Count
Enable
Zero
Output
Dropout
Time Delay
Pickup
Time Delay
Output
Count
Enable
Dropout
Time Delay
(Counter)
Pickup
Time Delay
(Counter)
Time
Constant
1 = Enable
0 = Disable
1 = pickup
0 = dropout
Zero Sequence
Voltage
Pickup
Level
Low Pass
Filter
>=
>=
+
-
Σ >
Advanced Motor Protection and RTD Protection Functions6.22 Device 59G - Fixed Pickup Definite Minimum Time Zero Sequence Overvoltage
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 131
Figure 6-66 OverZeroSeqVoltage Protection Diagram
NoteOverZeroSeqVoltage Protection Diagram
Fixed Pickup Instanteous Zero Sequence Overvoltage and fixed Pickup Definite Minimum Time Sequence Overvoltage use the same diagram. To provide clarity to the end-user, the titles are repeated so that the graph is adjacent to the text description of the function. This method of description is applied consistently throught this manual.
Advanced Motor Protection and RTD Protection Functions6.22 Device 59G - Fixed Pickup Definite Minimum Time Zero Sequence Overvoltage
Advanced Motor Protection for Variable Speed Operation132 Manual, AA, A5E46373908A
6.23 Device 66 - Notching or Jogging Device - Starts per HourOverviewThe starts per hour function is used to enforce a minimum time between starts of the machine. A programmable minimum time since last start can be set. A start attempt prior to the expiration of the minimum time can be programmed to trip, alarm, or block start.
NoteThe Protection Systems Engineer must ensure that either the fixed or variable Thermal Model protection parameters are properly set.
A thermal model is required for hot starts, cold starts, and minimum thermal capacity to run. It is not possible to use these functions without a thermal model. The software is arranged to automatically enable the fixed thermal model once one the three functions is enabled. That is, the thermal model cannot be disabled as long as the hot starts, cold starts, or minimum thermal capacity functions are enabled.
If the thermal model is not configured properly, the system will not be protected as intended.
Device 66 provides parameter status as shown in table Advanced Motor Protection Menu - Starts per Hour.
Table 6-25 Advanced Motor Protection Menu - Starts per Hour (ID 7590)
Keypad Parameter TextTool Parameter Text
ID Units DefaultValue
Minimum - Maximum Value
Min Time Since StartMinimum Starting Interval (Wait Period between Starts)
7591 sec 60 0 - 18000
Picklist ID Units DefaultValue
Values
Enable StateMinimum Starting Interval Enable
7592 Disabled ● Disabled● Alarm● LatchedAlarm● Trip● Block Start
The maximum response time with zero delay (pickup counter = 0) is 50 milliseconds.
Advanced Motor Protection and RTD Protection Functions6.23 Device 66 - Notching or Jogging Device - Starts per Hour
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 133
6.24 Device 66 - Notching or Jogging Device - Cold Starts per HourOverviewThe cold starts per hour function is used to enforce a maximum number of cold starts of the machine over an adjustable time period. An attempt to cold start the machine in excess of the allowable number can be programmed to trip, alarm, or block start. A cold start is defined as a start that occurs when the thermal capacity used is below an adjustable value
NoteThe Protection Systems Engineer must ensure that either the fixed or variable Thermal Model protection parameters are properly set.
A thermal model is required for hot starts, cold starts, and minimum thermal capacity to run. It is not possible to use these functions without a thermal model. The software is arranged to automatically enable the fixed thermal model once one the three functions is enabled. That is, the thermal model cannot be disabled as long as the hot starts, cold starts, or minimum thermal capacity functions are enabled.
If the thermal model is not configured properly, the system will not be protected as intended.
Device 66 provides parameter status as shown in table Advanced Motor Protection Menu - Notching or Jogging - Cold Starts per Hour.
Table 6-26 Advanced Motor Protection Menu - Notching or Jogging - Cold Starts per Hour (ID 7593)
Keypad Parameter TextTool Parameter Text
ID Units DefaultValue
Minimum - Maximum Value
% Thermal Capacity used to define a Cold StartMax Cold Starts per Hour
7594 % 5 0 - 100
Max Cold StartsMaximum Number of Cold Starts per the time interval
7595 2 0 - 16
Time IntervalTime Interval
7596 sec 3600 0 - 18000
Picklist ID Units DefaultValue
Values
Enable StateMax Cold Starts per Hour Enable State
7597 Disabled ● Disabled● Alarm● Latched Alarm● Trip
The maximum response time with zero delay (pickup counter = 0) is 50 milliseconds.
Advanced Motor Protection and RTD Protection Functions6.24 Device 66 - Notching or Jogging Device - Cold Starts per Hour
Advanced Motor Protection for Variable Speed Operation134 Manual, AA, A5E46373908A
6.25 Device 66 - Notching or Jogging Device - Hot Starts per HourOverviewThe hot starts per hour function is used to enforce a maximum number of hot starts of the machine over an adjustable time period. An attempt to hot start the machine in excess of the allowable number can be programmed to trip, alarm, or block start. A hot start can be defined as any start or a start that occurs when the thermal capacity used is above the adjustable value used by the cold starts per hour function.
NoteThe Protection Systems Engineer must ensure that either the fixed or variable Thermal Model protection parameters are properly set.
A thermal model is required for hot starts, cold starts, and minimum thermal capacity to run. It is not possible to use these functions without a thermal model. The software is arranged to automatically enable the fixed thermal model once one the three functions is enabled. That is, the thermal model cannot be disabled as long as the hot starts, cold starts, or minimum thermal capacity functions are enabled.
If the thermal model is not configured properly, the system will not be protected as intended.
Device 66 provides parameter status as shown in table Advanced Motor Protection Menu - Hot Starts per Hour
Table 6-27 Advanced Motor Protection Menu - Hot Starts per Hour (ID 7598)
Keypad Parameter TextTool Parameter Text
ID Units Default Value Minimum - Maximum Value
% Thermal Capacity used to define Hot StartMax Hot Starts per hour
7599 % 5 0 - 100
Max Hot StartsMaximum Number of Hot Starts per the time interval
7600 2 0 - 16
Time IntervalTime Interval
7601 sec 3600 0 - 18000
Picklist ID Units Default Value ValuesEnable StateMax Hot Starts per Hour Enable State
7602 Disabled ● Disabled● Alarm● LatchedAlarm● Trip● Block Start
The maximum response time with zero delay (pickup counter = 0) is 50 milliseconds.
Advanced Motor Protection and RTD Protection Functions6.25 Device 66 - Notching or Jogging Device - Hot Starts per Hour
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 135
6.26 Device 66 - Notching or Jogging Device - Maximum Thermal Capacity Used to Start
OverviewThe maximum thermal capacity used to start function is used to ensure that the machine has sufficient thermal capacity available to allow a start. An attempt to start the machine without sufficient thermal capacity available can be programmed to trip, alarm, or block start. The maximum amount of thermal capacity used when a start is no longer allowed is an adjustable parameter.
NoteThe Protection Systems Engineer must ensure that either the fixed or variable Thermal Model protection parameters are properly set.
A thermal model is required for hot starts, cold starts, and minimum thermal capacity to run. It is not possible to use these functions without a thermal model. The software is arranged to automatically enable the fixed thermal model once one the three functions is enabled. That is, the thermal model cannot be disabled as long as the hot starts, cold starts, or minimum thermal capacity functions are enabled.
If the thermal model is not configured properly, the system will not be protected as intended.
Device 66 provides parameter status as shown in table Advanced Motor Protection Menu - Notching or Jogging - Maximum Thermal Capacity Used to Start
Table 6-28 Motor Protection Menu - Maximum Thermal Capacity Used to Start (ID 7603)
Keypad Parameter TextTool Parameter Text
ID Units DefaultValue
Minimum - Maximum Value
Max Therm Cap AllowedMaximum Thermal Capacity allowed for start
7604 % 80 0 - 100
Picklist ID Units DefaultValue
Values
Enable StateMaximum Thermal Capacity Used to Start Enable
7605 Disabled ● Disabled● Alarm● Latched/Alarm● Trip● Block Start
The maximum response time with zero delay (pickup counter = 0) is 50 milliseconds.
Advanced Motor Protection and RTD Protection Functions6.26 Device 66 - Notching or Jogging Device - Maximum Thermal Capacity Used to Start
Advanced Motor Protection for Variable Speed Operation136 Manual, AA, A5E46373908A
6.27 Device 81 - Fixed Pickup OverfrequencyOverviewFixed pickup overfrequency is used to protect the motor and connected load against sustained operation under conditions of higher than desired frequency. The fixed pickup overfrequency function provides a single overfrequency setting that produces a trip or alarm condition when the frequency rises above that value. The function offers an enable that latches once a programmable minimum speed has been reached. The function will remain enabled until the drive stops or the demand is set to a value below the minimum speed reset. The minimum speed reset is used to define a range of demand settings below which the function will remain in a reset condition. The per-unit speed protection variable may be derived from a flux based Phase Locked Loop (PLL) or encoder.
NoteEncoder Loss
Depending upon the value of parameter 1320 (encoder loss response), the drive will either default to the phase locked loop to obtain motor speed information or the drive will stop.
Device 81 provides parameter status as shown in table Advanced Motor Protection Menu - Fixed Pickup Overfrequency
Note
Over-frequency is enabled by a minimum speed or by a starting time, both of which can be set to zero. If set to zero, the function is enabled on start-up.
Table 6-29 Advanced Motor Protection Menu - Fixed Pickup Overfrequency (ID 7606)
Keypad Parameter TextTool Parameter Text
ID Units DefaultValue
Minimum - Maximum Value
Pickup LevelFixed Pickup Overfrequency Pickup Level
7607 % 110 0 - 250
Pickup DelayFixed Pickup Overfrequency Pickup Delay
7608 sec 1 0 - 6000
Pickup DelayFixed Pickup Overfrequency Pickup Delay
7609 % 2 0 - 50
Dropout DelayFixed Pickup Overfrequency Dropout Delay
7610 sec 0.1 0 - 6000
Low Pass Time ConstantFixed Pickup Overfrequency Low Pass Time Con‐stant
7611 msec 0 0 - 1000
Minimum Speed 7612 % 0 0 - 100Startup TimeFixed Pickup Overfrequency Delay from Startup
7613 sec 5 0 - 6000
Advanced Motor Protection and RTD Protection Functions6.27 Device 81 - Fixed Pickup Overfrequency
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 137
Picklist ID Units DefaultValue
Minimum - Maximum Value
Enable StateFixed Pickup Overfrequency Enable State
7614 Disabled ● Disabled● Trip● Alarm● Latched Alarm
The maximum response time with zero delay (pickup counter=0) is 20 milliseconds. Fixed Over Frequency is mutually exclusive with Variable Over Frequency.
Pickup
Timed
Out
Dropout
Timed
Out
Dropout
Level
Output
Latching
Control
1 = Latched
Time
Constant
Reset
Low Pass
Filter Reset
Reset
Trip or
Alarm
Output
Zero
Count
Enable
Zero
Output
Dropout
Time Delay
Pickup
Time Delay
Output
Count
Enable
Dropout
Time Delay
(Counter)
Pickup
Time Delay
(Counter)
Time
Constant
1 = Enable
0 = Disable
1 = pickup
0 = dropout
Motor Frequency
Pickup
Level
Low Pass
Filter
>=
>=
+
-
Σ >
Figure 6-67 OverFrequency Protection Diagram
NoteOverfrequency Protection Diagram
Fixed Pickup Overfrequency and Variable Pickup Overfrequency use the same diagram. To provide clarity to the end-user, the titles are repeated so that the graph is adjacent to the text description of the function. This method of description is applied consistently throught this manual.
Advanced Motor Protection and RTD Protection Functions6.27 Device 81 - Fixed Pickup Overfrequency
Advanced Motor Protection for Variable Speed Operation138 Manual, AA, A5E46373908A
6.28 Device 81 - Variable Pickup OverfrequencyOverviewVariable pickup overfrequency is used to protect the motor and connected load against operation at higher frequencies than desired or to detect conditions under which the motor frequency has risen above the desired setpoint due to problems with load regeneration or other difficulties in the machine or load. The variable pickup overfrequency function provides a curve of overfrequency points as a function of the commanded motor speed. A trip or alarm condition occurs when that frequency rises above the curve at a given speed setting. The function offers an enable that latches once a programmable minimum speed has been reached. The function will remain enabled until the drive stops or the demand is set to a value below the minimum speed reset. The minimum speed reset is used to define a range of demand settings below which the function will remain in a reset condition. The function can also be enabled once a programmable time period has elapsed since the starting of the motor. The per-unit speed protection variable may be derived from a flux based Phase Locked Loop (PLL) or encoder.
NoteEncoder Loss
Depending upon the value of parameter 1320 (encoder loss response), when a loss of the encoder occurs, the drive will either default to the phase locked loop to obtain motor speed information or the drive will stop.
Device 81 provides parameter status as shown in table Advanced Motor Protection Menu - Variable Pickup Overfrequency.
Note
Over-frequency is enabled by a minimum speed or by a starting time, both of which can be set to zero. If set to zero, the function is enabled on start-up.
Table 6-30 Advanced Motor Protection Menu - Variable Pickup Overfrequency (ID 7615)
Keypad Parameter TextTool Parameter Help Text
ID Units DefaultValue
Minimum - Maximum Val‐ue
Variable Over Frequency CurveVar Over Freq Curve
7616 Sub-menu
Pickup DelayVariable Over Frequency w/ Min Speed Enable Pickup Delay
7637 sec 1 0 - 6000
Dropout LevelVariable Over Frequency w/ Min Speed Enable Drop‐out Level
7638 % 2 0 - 50
Dropout DelayVariable Over Frequency w/ Min Speed Enable Drop‐out Delay
7639 sec 0.1 0 - 6000
Low Pass Time ConstantVariable Over Frequency w/ Min Speed Enable Low Pass Time Constant
7640 msec 0 0 - 1000
Advanced Motor Protection and RTD Protection Functions6.28 Device 81 - Variable Pickup Overfrequency
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 139
Keypad Parameter TextTool Parameter Help Text
ID Units DefaultValue
Minimum - Maximum Val‐ue
Minimum SpeedVariable Over Frequency w/ Min Speed Enable Point
7641 % 0 0 - 100
Minimum Speed ResetVariable Over Frequency w/ Min Speed Enable Speed Reset Point
7642 % 10 0 - 100
Startup TimeVariable Over Frequency w/ Min Speed Enable from Startup
7643 5 0 - 6000
Picklist ID Units DefaultValue
Values
Enable StateVariable Over Frequency Enable State
7644 Disabled ● Disabled● Alarm● LatchedAlarm● Trip
Advanced Motor Protection Menu - Variable Overfrequency Curve Menu (ID 7616)
Keypad Parameter TextTool Parameter Help Text
ID Units DefaultValue
Minimum - Maximum Value
0% Speed PickupDefine Pickup Level in % of Rated Hz at 0% Demanded Speed
7617 % 10 0 - 250
10% Speed PickupDefine Pickup Level in %of Rated Hz at at 10% Deman‐ded Speed
7618 % 20 0 - 250
20% Speed PickupDefine Pickup Level in % of Rated Hz at at 20% Deman‐ded Speed
7619 % 30 0 - 250
30% Speed PickupDefine Pickup Level in % of Rated Hz at at 30% Deman‐ded Speed
7620 % 40 0 - 250
40% Speed PickupDefine Pickup Level in % of Rated Hz at at 40% Deman‐ded Speed
7621 % 50 0 - 250
50% Speed PickupDefine Pickup Level in % of Rated Hz at at 50% Deman‐ded Speed
7622 % 60 0 - 250
60% Speed PickupDefine Pickup Level in % of Rated Hz at at 60% Deman‐ded Speed
7623 % 70 0 - 250
70% Speed PickupDefine Pickup Level in % of Rated Hz at at 70% Deman‐ded Speed
7624 % 80 0 - 250
Advanced Motor Protection and RTD Protection Functions6.28 Device 81 - Variable Pickup Overfrequency
Advanced Motor Protection for Variable Speed Operation140 Manual, AA, A5E46373908A
Keypad Parameter TextTool Parameter Help Text
ID Units DefaultValue
Minimum - Maximum Value
80% Speed PickupDefine Pickup Level in % of Rated Hz at at 80% Deman‐ded Speed
7625 % 90 0 - 250
90% Speed PickupDefine Pickup Level in % of Rated Hz at at 90% Deman‐ded Speed
7626 % 100 0 - 250
100% Speed PickupDefine Pickup Level in % of Rated Hz at at 100% De‐manded Speed
7627 % 110 0 - 250
110% Speed PickupDefine Pickup Level in % of Rated Hz at at 110% De‐manded Speed
7628 % 120 0 - 250
120% Speed PickupDefine Pickup Level in % of Rated Hz at at 120% De‐manded Speed
7629 % 130 0 - 250
130% Speed PickupDefine Pickup Level in % of Rated Hz at at 130% De‐manded Speed
7630 % 140 0 - 250
140% Speed PickupDefine Pickup Level in % of Rated Hz at at 140% De‐manded Speed
7631 % 150 0 - 250
150% Speed PickupDefine Pickup Level in % of Rated Hz at at 150% De‐manded Speed
7632 % 160 0 - 250
160% Speed PickupDefine Pickup Level in % of Rated Hz at at 160% De‐manded Speed
7633 % 170 0 - 250
170% Speed PickupDefine Pickup Level in % of Rated Hz at at 170% De‐manded Speed
7634 % 180 0 - 250
180% Speed PickupDefine Pickup Level in % of Rated Hz at at 180% De‐manded Speed
7635 % 190 0 - 250
190% Speed PickupDefine Pickup Level in % of Rated Hz at at 190% De‐manded Speed
7636 % 200 0 - 250
The maximum response time with zero delay (pickup counter=0) is 20 milliseconds.. Variable Over Frequency is mutually exclusive with Fixed Over Frequency.
Advanced Motor Protection and RTD Protection Functions6.28 Device 81 - Variable Pickup Overfrequency
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 141
Pickup
Timed
Out
Dropout
Timed
Out
Dropout
Level
Output
Latching
Control
1 = Latched
Time
Constant
Reset
Low Pass
Filter Reset
Reset
Trip or
Alarm
Output
Zero
Count
Enable
Zero
Output
Dropout
Time Delay
Pickup
Time Delay
Output
Count
Enable
Dropout
Time Delay
(Counter)
Pickup
Time Delay
(Counter)
Time
Constant
1 = Enable
0 = Disable
1 = pickup
0 = dropout
Motor Frequency
Pickup
Level
Low Pass
Filter
>=
>=
+
-
Σ >
Figure 6-68 Overfrequency Protection Diagram
NoteOverfrequency Protection Diagram
Fixed Pickup Overfrequency and Variable Pickup Overfrequency use the same diagram. To provide clarity to the end-user, the titles are repeated so that the graph is adjacent to the text description of the function. This method of description is applied consistently throught this manual.
Advanced Motor Protection and RTD Protection Functions6.28 Device 81 - Variable Pickup Overfrequency
Advanced Motor Protection for Variable Speed Operation142 Manual, AA, A5E46373908A
6.29 Device 81 - Fixed Pickup UnderfrequencyFixed pickup underfrequency is used to protect the motor and connected load against sustained operation under conditions of lower than desired frequency. The fixed pickup underfrequency function provides a single underfrequency setting that produces a trip or alarm condition when the frequency falls below that value. The function offers an enable that latches once a programmable minimum speed has been reached. The function can also be enabled once a programmable time period has elapsed since the starting of the motor.reached. The function will remain enabled until the drive stops or the demand is set to a value below the minimum speed reset. The minimum speed reset is used to define a range of demand settings below which the function will remain in a reset condition. The per-unit speed protection variable may be derived from a flux based Phase Locked Loop (PLL) or encoder.
NoteEncoder Loss
Depending upon the value of parameter 1320 (encoder loss response), when a loss of the encoder occurs, the drive will either default to the phase locked loop to obtain motor speed information or the drive will stop.
Device 81 provides parameter status as shown in table Advanced Motor Protection Menu - Fixed Pickup Overfrequency.
Table 6-31 Advanced Motor Protection Menu - Fixed Pickup Underfrequency (ID 7645)
Keypad Parameter TextTool Parameter Text
ID Units DefaultValue
Minimum - Maximum Value
Pickup LevelFixed Pickup Underfrequency Pickup Level
7546 % 5 200
Pickup DelayFixed Pickup Underfrequency Pickup Delay
7647 sec 1 0 - 6000
Dropout LevelFixed Pickup Underfrequency Dropout Level
7648 % 102 100 - 200
Dropout DelayFixed Pickup Underfrequency Dropout Delay
7649 sec 0.1 0 - 6000
Low Pass Time ConstantFixed Pickup Underfrequency Low Pass Time Con‐stant
7650 msec 0 0 - 1000
Minimum SpeedFixed Pickup Underfrequency Minimum Speed En‐able Point
7651 % 20 0 - 100
Startup TimeFixed Pickup Underfrequency Delay from Startup
7652 sec 5 0 - 6000
Advanced Motor Protection and RTD Protection Functions6.29 Device 81 - Fixed Pickup Underfrequency
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 143
Picklist ID Units DefaultValue
Values
Enable StateFixed Pickup Underfrequency Enable State
7653 Disabled ● Disabled● Alarm● LatchedAlarm● Trip
The maximum response time with zero delay (pickup counter=0) is 20 milliseconds. Fixed Pickup Underfrequency is mutually exclusive with the Variable Pickup Underfrequency.
Pickup
Timed
Out
Dropout
Timed
Out
1 - Dropout
Level
Output
Latching
Control
1 = Latched
Time
Constant
Reset
Low Pass
Filter Reset
Reset
Trip or
Alarm
Output
Zero
Count
Enable
Zero
Output
Dropout
Time Delay
Pickup
Time Delay
Output
Count
Enable
Dropout
Time Delay
(Counter)
Pickup
Time Delay
(Counter)
Time
Constant
1 = Enable
0 = Disable
1 = pickup
0 = dropout
Motor Frequency
Pickup
Level
Low Pass
Filter
>=
>=
+
-
Σ <
Figure 6-69 UnderFrequency Protection Diagram
Advanced Motor Protection and RTD Protection Functions6.29 Device 81 - Fixed Pickup Underfrequency
Advanced Motor Protection for Variable Speed Operation144 Manual, AA, A5E46373908A
6.30 Device 81 - Variable Pickup UnderfrequencyOverviewVariable pickup underfrequency is used to protect the motor and connected load against operation at lower frequencies than desired or to detect conditions under which the motor frequency has fallen below the desired setpoint due to problems with excessive load torque or other difficulties in the machine or load. The variable pickup underfrequency function provides a curve of underfrequency points as a function of the commanded motor speed. A trip or alarm condition occurs when that frequency falls below the curve at a given speed setting. The function offers an enable that latches once a programmable minimum speed has been reached. The function will remain enabled until the drive stops or the demand is set to a value below the minimum speed reset. The minimum speed reset is used to define a range of demand settings below which the function will remain in a reset condition. A flux based phase-lock-loop (PLL) or encoder provides the per unit speed (absolute value) input measurement data. The default is PLL.
NoteEncoder Loss
Depending upon the value of parameter 1320 (encoder loss response), when a loss of the encoder occurs, the drive will either default to the phase locked loop to obtain motor speed information or the drive will stop.
Device 81 provides parameter status as shown in table Advanced Motor Protection Menu - Variable Pickup Underfrequency.
Table 6-32 Advanced Motor Protection Menu - Variable Pickup Underfrequency (ID 7654)
Keypad Parameter TextTool Parameter Help Text
ID Units DefaultValue
Minimum - Maximum Value
Variable Under Frequency CurveVar Under Freq Curve
7655 Sub-menu
Pickup DelayVariable Pickup Underfrequency Pickup Delay
7676 sec 1 0 - 6000
Dropout LevelVariable Over Frequency Dropout Level
7677 % 102 100 - 200
Dropout DelayVariable Pickup Underfrequency Dropout Delay
7678 sec 0.1 0 - 6000
Low Pass Time ConstantVariable Pickup Underfrequency Low Pass Time Con‐stant
7679 msec 0 0 - 1000
Minimum SpeedVariable Pickup Underfrequency Minimum Speed Ena‐ble Point
7680 % 20 0 - 100
Minimum Speed ResetVariable Pickup Underfrequency Enable Speed Reset Point
7681 % 10 0 - 100
Startup Time 7682 sec 5 0 - 6000
Advanced Motor Protection and RTD Protection Functions6.30 Device 81 - Variable Pickup Underfrequency
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 145
Picklist ID Units DefaultValue
Values
Enable StateVariable Pickup Underfrequency Enable State
7683 Disabled ● Disabled● Alarm● LatchedAlarm● Trip
Variable Underfrequency Curve Menu (7655)
Keypad Parameter TextTool Parameter Help Text
ID Units DefaultValue
Minimum - Maximum Value
0% Speed PickupDefine Pickup Level in % of Rated Hz at 0% Deman‐ded Speed
7656 % -1 0 - 250
10% Speed PickupDefine Pickup Level in %of Rated Hz at at 10% De‐manded Speed
7657 % 0 0 - 250
20% Speed PickupDefine Pickup Level in % of Rated Hz at at 20% De‐manded Speed
7658 % 10 0 - 250
30% Speed PickupDefine Pickup Level in % of Rated Hz at at 30% De‐manded Speed
7659 % 20 0 - 250
40% Speed PickupDefine Pickup Level in % of Rated Hz at at 40% De‐manded Speed
7660 % 30 0 - 250
50% Speed PickupDefine Pickup Level in % of Rated Hz at at 50% De‐manded Speed
7661 % 40 0 - 250
60% Speed PickupDefine Pickup Level in % of Rated Hz at at 60% De‐manded Speed
7662 % 50 0 - 250
70% Speed PickupDefine Pickup Level in % of Rated Hz at at 70% De‐manded Speed
7663 % 60 0 - 250
80% Speed PickupDefine Pickup Level in % of Rated Hz at at 80% De‐manded Speed
7664 % 70 0 - 250
90% Speed PickupDefine Pickup Level in % of Rated Hz at at 90% De‐manded Speed
7665 % 80 0 - 250
100% Speed PickupDefine Pickup Level in % of Rated Hz at at 100% De‐manded Speed
7666 % 90 0 - 250
Advanced Motor Protection and RTD Protection Functions6.30 Device 81 - Variable Pickup Underfrequency
Advanced Motor Protection for Variable Speed Operation146 Manual, AA, A5E46373908A
Keypad Parameter TextTool Parameter Help Text
ID Units DefaultValue
Minimum - Maximum Value
110% Speed PickupDefine Pickup Level in % of Rated Hz at at 110% De‐manded Speed
7667 % 100 0 - 250
120% Speed PickupDefine Pickup Level in % of Rated Hz at at 120% De‐manded Speed
7668 % 110 0 - 250
130% Speed PickupDefine Pickup Level in % of Rated Hz at at 130% De‐manded Speed
7669 % 120 0 - 250
140% Speed PickupDefine Pickup Level in % of Rated Hz at at 140% De‐manded Speed
7670 % 130 0 - 250
150% Speed PickupDefine Pickup Level in % of Rated Hz at at 150% De‐manded Speed
7671 % 140 0 - 250
160% Speed PickupDefine Pickup Level in % of Rated Hz at at 160% De‐manded Speed
7672 % 150 0 - 250
170% Speed PickupDefine Pickup Level in % of Rated Hz at at 170% De‐manded Speed
7673 % 160 0 - 250
180% Speed PickupDefine Pickup Level in % of Rated Hz at at 180% De‐manded Speed
7674 % 170 0 - 250
190% Speed PickupDefine Pickup Level in % of Rated Hz at at 190% De‐manded Speed
7675 % 180 0 - 250
The maximum response time with zero delay (pickup counter = 0) is 20 milliseconds. Variable Pickup Underfrequency is mutually exclusive with the Fixed Pickup Underfrequency.
Advanced Motor Protection and RTD Protection Functions6.30 Device 81 - Variable Pickup Underfrequency
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 147
Pickup
Timed
Out
Dropout
Timed
Out
1 - Dropout
Level
Output
Latching
Control
1 = Latched
Time
Constant
Reset
Low Pass
Filter Reset
Reset
Trip or
Alarm
Output
Zero
Count
Enable
Zero
Output
Dropout
Time Delay
Pickup
Time Delay
Output
Count
Enable
Dropout
Time Delay
(Counter)
Pickup
Time Delay
(Counter)
Time
Constant
1 = Enable
0 = Disable
1 = pickup
0 = dropout
Motor Frequency
Pickup
Level
Low Pass
Filter
>=
>=
+
-
Σ <
Figure 6-70 Underfrequency Protection Diagram
Advanced Motor Protection and RTD Protection Functions6.30 Device 81 - Variable Pickup Underfrequency
Advanced Motor Protection for Variable Speed Operation148 Manual, AA, A5E46373908A
6.31 Device 81 - Fixed Pickup High Frequency Rate of ChangeOverviewFixed pickup high frequency rate of change is used to protect the motor and connected load against fast changing frequencies or high rates of acceleration. The fixed pickup high frequency rate-of-change function provides a single frequency rate of change setting that produces a trip or an alarm condition when the rate-of-change of frequency rises above that value. The function offers an enable that latches once a programmable minimum speed has been reached. The function can also be enabled once a programmable time period has elapsed since the starting of the motor. The per-unit speed protection variable may be derived from a flux based Phase Locked Loop (PLL) or encoder. The default is PLL.
NoteEncoder Loss
Depending upon the value of parameter 1320 (encoder loss response),when a loss of the encoder occurs, the drive will either default to the phase locked loop to obtain motor speed information or the drive will stop.
Device 81 provides parameter status as shown in table Advanced Motor Protection Menu - Fixed Pickup High Frequency Rate of Change.
Table 6-33 Advanced Motor Protection Menu - Fixed Pickup High Frequency Rate of Change (ID 7684)
Keypad Parameter TextTool Parameter Text
ID Units DefaultValue
Minimum - Maximum Value
Pickup LevelFixed High Frequency Rate of Change Pickup Level max % per second change
7685 % 10 0 - 200
Pickup DelayFixed High Frequency Rate of Change Pickup Delay
7686 sec 1 0 - 6000
Dropout LevelFixed High Frequency Rate of Change Dropout Level
7687 % 2 100 - 200
Dropout DelayFixed High Frequency Rate of Change Dropout De‐lay
7688 sec 0.1 0 - 6000
Low Pass Time ConstantFixed High Frequency Rate of Change Low Pass Time Constant
7689 msec 0 0 - 1000
Minimum SpeedFixed Under Frequency Enable Point
7690 % 20 0 - 100
Startup TimeFixed High Frequency Rate of Change Delay from Startup
7691 sec 5 0 - 6000
Advanced Motor Protection and RTD Protection Functions6.31 Device 81 - Fixed Pickup High Frequency Rate of Change
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 149
Picklist ID Units DefaultValue
Values
Enable StateFixed High Frequency Rate of Change Min Speed Enable State
7692 Disabled ● Disabled● Alarm● LatchedAlalrm● Trip
The maximum response time with zero delay (pickup counter = 0) is 10 milliseconds.
Pickup
Timed
Out
Dropout
Timed
Out
Dropout
Level
Output
Latching
Control
1 = Latched
Time
Constant
Reset
Low Pass
Filter Reset
Reset
Trip or
Alarm
Output
Zero
Count
Enable
Zero
Output
Dropout
Time Delay
Pickup
Time Delay
Output
Count
Enable
Dropout
Time Delay
(Counter)
Pickup
Time Delay
(Counter)
Time
Constant
1 = Enable
0 = Disable
1 = pickup
0 = dropout
Rate of Change of
Motor Frequency
Pickup
Level
Low Pass
Filter
>=
>=
+
-
Σ >
Figure 6-71 OverFrequencyRate Protection
Advanced Motor Protection and RTD Protection Functions6.31 Device 81 - Fixed Pickup High Frequency Rate of Change
Advanced Motor Protection for Variable Speed Operation150 Manual, AA, A5E46373908A
6.32 Changing RTD Type
6.32.1 Changing RTD TypeThe Advanced Motor Protection, can be set up for a wide variety of RTD types. However, it is set up at the factory for the desired RTD type. It is NOT field adjustable. If a type change in RTD type is needed, please contact Siemens support.at 1 800 333 7421.
NOTICE
Specify RTD Type at Time of Manufacture
The AMP is configured to use PT-100 Type RTDs at time of manufacture by default.
Advanced Motor Protection and RTD Protection Functions6.32 Changing RTD Type
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 151
Advanced Motor Protection and RTD Protection Functions6.32 Changing RTD Type
Advanced Motor Protection for Variable Speed Operation152 Manual, AA, A5E46373908A
Alarms, Faults, and Logging Messages 77.1 Alarms, Faults, and Logging Messages
The AMP function displays "AMP General Alarm" when an AMP function that is enabled as either Alarm, Latched Alarm, or Block Start and has an active output. The function displays "AMP General Fault" in the event that a function that is enabled as TRIP and has an active output.
The "AMP General Alarm" and "AMP General Fault" do not describe the specific AMP function that triggered the output. To view the specific function that triggered this alarm or fault, one must either consult the Debug Screens "AMP Alarms/Faults" and "AMP Data", or the Event Log.
The Event Log displays which specific AMP function triggered the active General Alarm or General Fault along with the exact time at which the event occurred. Siemens recommends using the Event Log data as a diagnostic tool when investigating the cause of displayed messages.
The following table contains the AMP functions and their associated Event Log Messages that could trigger the AMP Alarm or Fault.
Note
All function outputs are visible at the networkms through manual IDs.
Table 7-1 Advanced Motor Protection Function Event Log Table
Function Name Menu ID Event Log Message1
Fixed UnderSpeed 7217 Alarm: Fixed Under SpeedFault: Under Speed
Variable UnderSpeed 7226 Alarm: Variable Under SpeedFault: Variable Under Speed
Fixed OverSpeed 7181 Alarm: Fixed Over SpeedFault: Fixed Over Speed
Variable OverSpeed 7189 Alarm: Variable Over SpeedFault: Variable Over Speed
Fixed UnderCurrent 7256 (3 Phase) Alarm: Fixed Under Current RMSAFault: Fixed Under Current RMSAAlarm: Fixed Under Current RMSBFault: Fixed Under Current RMSBAlarm: Fixed Under Current RMSCFault: Fixed Under Current RMSC
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 153
Function Name Menu ID Event Log Message1
Variable UnderCurrent 7266 (3 Phase) Alarm: Variable Under Current RMSAFault: Variable Under Current RMSAAlarm: Variable Under Current RMSBFault: Variable Under Current RMSBAlarm: Variable Under Current RMSCFault: Variable Under Current RMSC
Fixed Under Power 7297 Alarm: Fixed Under PowerFault: Fixed Under Power
Fixed Torque Pulsation 7306 Alarm: Fixed Torque PulsationFault: Fixed Torque Pulsation
Fixed Negative Se‐quence OverCurrent
7316 Alarm: Fixed Negative Sequence Over CurrentFault: Fixed Negative Sequence Over Current
Maximum Start Time 7325 Alarm: Maximum Start TimeFault: Maximum Start Time
Maximum Stop Time 7330 Alarm: Maximum Stop TimeFault: Maximum Stop Time
Fixed Thermal Overload 7335 Alarm: Fixed Thermal Overload 1Fault: Fixed Thermal Overload 1 Alarm: Fixed Thermal Overload 2Fault: Fixed Thermal Overload 2Note: If Configured for Block Start Enable State, Log Message displayed is:AMP Fixed Thermal Overload Block Start
Variable Thermal Over‐load
7352
Alarm: Variable Thermal Overload 1Fault: Variable Thermal Overload 1 Alarm: Variable Thermal Overload 2Fault: Variable Thermal Overload 2Note: If Configured for Block Start Enable State, Log Message displayed is:AMP Variable Thermal Overload Block Start
Fixed Instantaneous OverCurrent
7515 (3 Phases)
Alarm: Fixed Instantaneous Over Current RMSAFault: Fixed Instantaneous Over Current RMSAAlarm: Fixed Instantaneous Over Current RMSBFault: Fixed Instantaneous Over Current RMSBAlarm: Fixed Instantaneous Over Current RMSCFault: Fixed Instantaneous Over Current RMSC
Inverse Time OverCurrent 7533 (3 Phases) Alarm: Inverse Time Over Current Current RMSAFault: Inverse Time Over Current RMSAAlarm: Inverse Time Over Current Current RMSAFault: Inverse Time Over Current RMSAAlarm: Inverse Time Over Current Current RMSAFault: Inverse Time Over Current RMSA
Fixed Zero Sequence Over Voltage
7524 Alarm: Fixed Zero Sequence Over VoltageFault: Fixed Zero Sequence Over Voltage
Alarms, Faults, and Logging Messages7.1 Alarms, Faults, and Logging Messages
Advanced Motor Protection for Variable Speed Operation154 Manual, AA, A5E46373908A
Function Name Menu ID Event Log Message1
Fixed Instantaneous Zero Sequence Over Voltage
7563 Alarm: Fixed Instantaneous Zero Sequence Over VoltageFault: Fixed Instantaneous Zero Sequence Over Voltage
Fixed Maximum Power Factor
7572 Alarm: Fixed Maximum Power FactorFault: Fixed Maximum Power Factor
Fixed Minimum Power Factor
7581 Alarm: Fixed Minimum Power FactorFault: Fixed Minimum Power Factor
Fixed Over Frequency 7606 Alarm: Fixed Over FrequencyFault: Fixed Over Frequency
Variable Over Frequency 7615 Alarm: Variable Over FrequencyFault: Variable Over Frequency
Fixed Under Frequency 7645 Alarm: Fixed Under FrequencyFault: Fixed Under Frequency
Variable Under Frequen‐cy
7654 Alarm: Variable Under FrequencyFault: Variable Under Frequency
Fixed High Frequency Rate of Change
7684 Alarm: Fixed High Frequency Rate of ChangeFault: Fixed High Frequency Rate of Change
Minimum Thermal Ca‐pacity to Start
7603 Alarm: Minimum Thermal Capacity to StartFault: Minimum Thermal Capacity to StartNote: If Configured for Block Start Enable State, Log Message displayed is:AMP Thermal Bockstart
Maximum Number of Cold Starts
7593 Alarm: Maximum Number of Cold StartsFault: Maximum Number of Cold StartsNote: If Configured for Block Start Enable State, Log Message displayed is:AMP Max Hot Start Bockstart
Maximum Number of Hot Starts
7598 Alarm: Maximum Number of Hot StartsFault: Maximum Number of Hot StartsNote: If Configured for Block Start Enable State, Log Message displayed is:AMP Max Hot Start Bockstart
Minimum Time Between Starts
7590 Alarm: Minimum Time Between StartsFault: Minimum Time Between StartsNote: If Configured for Block Start Enable State, Log Message displayed is:AMP Starting Time Interval Blockstart
1 Display will show either Alarm or Fault depending upon configuration
Alarms, Faults, and Logging Messages7.1 Alarms, Faults, and Logging Messages
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 155
Displayed Event Log MessageIn the following table the text shown between brackets, "<#>", is replaced with the RTD number (1 through 12) associated with the event. For example, if RTD 1 exceeded its temperature setpoint and was enabled as an alarm, the event log message would display "RTD Alarm: RTD 1 OT".
Table 7-2 RTD Protection Function Event Log Table
Function Name Menu ID Displayed Event Log Message1
RTD Protection 7429 (12 RTDs) Alarm: RTD <#> OT : RTD <1> OT : RTD <2> OT : RTD <3> OT through :RTD <12> OTFault: RTD <#> OT : RTD <1> OT : RTD <2> OT : RTD <3> OT through : RTD <12> OTNote: OT = Over Temperature
Alarm: RTD <#> Shrt : RTD <1> Shrt : RTD <2> Shrt : RTD <3> Shrt through : RTD <12> ShrtFault: RTD <#> Shrt : RTD <1> Shrt : RTD <2> Shrt : RTD <3> Shrt through : RTD <12> ShrtNote: Shrt = Short
Alarms, Faults, and Logging Messages7.1 Alarms, Faults, and Logging Messages
Advanced Motor Protection for Variable Speed Operation156 Manual, AA, A5E46373908A
Function Name Menu ID Displayed Event Log Message1
Alarm: RTD <#> Open : RTD <1> Open : RTD <2> Open : RTD <3> Open through :RTD <12> OpenFault: RTD <#> Open : RTD <1> Open : RTD <2> Open : RTD <3> Open through : RTD <12> Open
AMP RTD Communications Lost AMP RTD Block Start
See alsoAMP Alarms / Faults (Page 161)
Alarms, Faults, and Logging Messages7.1 Alarms, Faults, and Logging Messages
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 157
Alarms, Faults, and Logging Messages7.1 Alarms, Faults, and Logging Messages
Advanced Motor Protection for Variable Speed Operation158 Manual, AA, A5E46373908A
NXGpro AMP Alarms/Faults, Protection Variables, and RTD Status Screens 88.1 Viewing Protection Variables
Selecting Menu Display Protection VariablesThe display parameters menu (8000) contains the pick lists to select the variable to be displayed on the front panel default display.
Selecting this menu provides the user to view / set parameters to be displayed.
(m e nu )( 8 0 0 0 )
Figure 8-1 Display Parameters
After selecting the Display Parameters menu as shown above, scroll using the arrow to select one of the following picklist variable parameters to display.
Picklist Variable Displayed Description UnitIMRF Mag current ref (A)ITRF Trq current ref (A)FLDS Flux DS (%)FLQS Flux QS (%)VDRF Vds reference (%)VQRF Vqs reference (%)SLIP Slip frequency (%)
%SPD Motor speed (%)FREQ Output Frequency (Hz)RPM Motor speed (RPM)VLTS Motor voltage (V)IMAG Mag current filtered (A)ITRQ Trq current filtered (A)ITOT Motor current (A)
%TRQ Torque out (%)KWO Output power (KW)RESS Stator resistance (%)DEMD Speed demand (%)SREF Speed reference (%)FDMD Raw flux demand (%)
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 159
Picklist Variable Displayed Description UnitFXRF Flux reference (%) (%)IDIN Id input current (A)IQIN Iq input current (A)IAIN Phase A input current (A)IBIN Phase B input current (A)ICIN Phase C input current (A)IAVI Total input current (A)VAIN Phase A input voltage (V)VBIN Phase B input voltage (V)VCIN Phase C input voltage (V)VZSQ Zero sequence voltage (V)
The additional screens as discussed in the following paragraphs provide the user with the ability to view protection variables. These screens are:
● AMP Data Screen
● AMP Alarms / Faults Screen
● RTD Status Screen
8.1.1 AMP Data Screen
AMP DataThe AMP Data screen displays data points associated with the AMP functions. The upper half of this screen shows values that are used as inputs to the various protection functions.
The lower portion of this screen contains several function outputs not seen on the AMP Faults / Alarms screen as described in another section of this chapter. The lower portion of the display screen also displays temperatures from RTDs that are used in algorithms associated with the Thermal Overload function (Hottest Ambient RTD, Hottest Stator RTD).
NXGpro AMP Alarms/Faults, Protection Variables, and RTD Status Screens8.1 Viewing Protection Variables
Advanced Motor Protection for Variable Speed Operation160 Manual, AA, A5E46373908A
Figure 8-2 AMP Data Screen
See alsoAMP Alarms / Faults (Page 161)
Device 49RTD - Machine Thermal Overload - Fixed Pickup RTD Protection (Page 70)
Device 49T - Machine Thermal Model - Variable Parameter Thermal Overload (Page 63)
8.1.2 AMP Alarms / Faults
Alarms / Fault ScreenThe AMP Alarms/Faults screen displays the Boolean value of each individual AMP function output. This screen can be used to evaluate which function activated the AMP General Alarm or AMP General Fault.
NXGpro AMP Alarms/Faults, Protection Variables, and RTD Status Screens8.1 Viewing Protection Variables
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 161
Figure 8-3 AMP Alarms / Faults Screen
Understanding the AMP / Faults Screen Using the screen capture shown in the AMP Alarms / Faults Screen, it can be seen that the Phase A, Phase B, and Phase C Instantaneous Over Current all show a 0 bit status. Refer to the NXGpro Communications Manual, version AC or higher and open the Appendix "Output Data IDs". The Instantaneous Over Current Data ID 2023 shows that the point description for each phase overcurrent A, B, C corresponds to bit fields 11, 12, 13 respectively. If a "1" instead of "0" displays, that would mean that a fault or alarm (depending on configuration) has occurred. An capture of one of the pages in this Output ID appendix is provided below for additional clarification.
NXGpro AMP Alarms/Faults, Protection Variables, and RTD Status Screens8.1 Viewing Protection Variables
Advanced Motor Protection for Variable Speed Operation162 Manual, AA, A5E46373908A
Figure 8-4 Output Data IDs
See alsoAMP Data Screen (Page 160)
NXGpro AMP Alarms/Faults, Protection Variables, and RTD Status Screens8.1 Viewing Protection Variables
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 163
8.1.3 RTD Status Screen
RTD StatusThe RTD Status Screen displays the status and temperature of all RTD inputs. The RTD status may be displayed as OK, Short, Open, or Disable.
Referring to the RTD Status Screen shown below, it can be seen that RTD1 (RT1) displays a status of OK. This means that the RTD1 is enabled, and neither shorted, nor opened. Viewing the lower portion of the status screen, it can be seen that RTD1 shows a valid temperature of 94.2 °C . The remaining RTDs in the status screen display a status of Disable.
Looking at the lower portion of the screen, it can be seen all but the valid RTD have a temperature value of 3276 °C. This is a purposely programmed value to show that the RTD does not have an OK status. In this screen, the status of those RTDs with invalid temperature show a Disable status. Other valid status for invalid temperature display may be Short, Open, or Disable.
Figure 8-5 RTD Status Screen
See alsoDevice 49RTD - Machine Thermal Overload - Fixed Pickup RTD Protection (Page 70)
NXGpro AMP Alarms/Faults, Protection Variables, and RTD Status Screens8.1 Viewing Protection Variables
Advanced Motor Protection for Variable Speed Operation164 Manual, AA, A5E46373908A
Troubleshooting 99.1 Troubleshooting
Should the AMP menu not display properly, ensure that the PLC is correctly installed. The protection engineer responsible for the initial programming should be able to correct this problem.
If this issue persists, contact Siemens Support. This information is contained in the Service and Support chapter of this manual.
NoteThe PLC is a ‘key’ to unlock the AMP and RTD functions in the VFD control.● Should the AMP menu not display properly on the PLC, please check for loose connections
to the PLC and verify that the internal IP address of the VFD is set to 172.17.20.16 (Parameter #9310).
● The PLC contains an encrypted passcode. The passcode only gives access to the PLC software in the VFD control. This passcode is not required to program the protection functions of the motor that AMP provides.
● If a PLC issue persists, please contact Siemens Support. This information is contained in the Service and Support chapter of this manual.
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 165
Troubleshooting9.1 Troubleshooting
Advanced Motor Protection for Variable Speed Operation166 Manual, AA, A5E46373908A
Spare Parts Data 1010.1 AMP Replaceable Spart Parts List
Part Number MLFB DescriptionA5E33854477 6ES72315PD320XB0 4 CH AIA5E33854924 6ES72315PF320XB0 8 CH AIA5E35553741 6EP13315BA10 Power SupplyA5E30574338 6GK72771AA100AA0 Network Switch
The links below provide the technical specification data for the Advanced Motor Protection Relay.
https://mall.industry.siemens.com/mall/en/us/Catalog/Search/?searchTerm=6ES72121AE400XB0
https://mall.industry.siemens.com/mall/en/us/Catalog/Search/?searchTerm=6ES72315PD320XB0
https://mall.industry.siemens.com/mall/en/us/Catalog/Search/?searchTerm=6EP13315BA10
https://mall.industry.siemens.com/mall/en/us/Catalog/Search/?searchTerm=6GK2771AA100110
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 167
Spare Parts Data 10.1 AMP Replaceable Spart Parts List
Advanced Motor Protection for Variable Speed Operation168 Manual, AA, A5E46373908A
Appendix AA.1 IEEE Device Numbers and Functions
IEEE device numbers and functions Each standard device number, its definition and its functions are based on a system adopted as standard for automatic switchgear by IEEE, and incorporated in American Standard C37.2 - (1979). The table provides the definition of only those functions used in motor relay protection for Sinamics GH180 Medium Voltage Variable Frequency Drives.
Device Number
Definition and Function
12 Overspeed device is usually a direct-connected speed switch that functions on machine overspeed.14 Underspeed device functions when the speed of a machine falls below a pre-determined value.37 Undercurrent or underpower relay functions when the current or power flow decreases below a predetermined
value.38 Bearing protective device functions on excessive bearing temperature or on other abnormal mechanical con‐
ditions associated with the bearing, such a s undue wear, which may eventually result in excessive bearing temperature or failure.
46 Reverse-phase or phase-balance current relay is a relay that functions when the polyphase currents are of reverse phase sequence or when the polyphase currents are unbalanced or contain negative phase-sequence components above a given amount.
48 Incomplete sequence relay is a relay that generally returns the equipment to the normal, or off, position and locks it out if the normal starting, operating, or stopping sequence is not properly completed within a prede‐termined time. If the device is used for alarm purposes only, it should preferably be designated as 48A alarm.
49 Machine or transformer thermal relay is a relay that functions when the temperature of a machine armature winding or other load carry winding or element of a machine or power transformer exceeds a predetermined value.
50 Instantaneous overcurrent relay is a relay that functions instantaneously on an excessive value of current.51 AC time overcurrent relay is a relay with either a definite or inverse time characteristic that functions when the
ac input current exceeds a predetermined value, and in which the input current and operating time are inde‐pendently related or inversely related through a substantial portion of the performance range.
55 Power factor relay is a relay that operates when the power factor in an ac circuit rises above or falls below a predetermined value.
66 Notching or jogging device functions to allow only a specified number of operations of a given device or equipment, or a specified number of successive operations within a given time of each other. It is also a device that functions to energize a circuit periodically or for fractions of specified time intervals, or that is used to permit intermittent acceleration or jogging of a machine at low speeds for mechanical positioning,
81 Frequency relay is a relay that responds to the frequency of an electrical quantity, operating when the frequency or rate of change of frequency exceeds or is less than a predetermind value.
Separate descriptive tables as configured for the devices used in Motor Protection for SINAMICS GH180 Medium Voltage Variable Frequency Drives are provided in the sections that follow.
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 169
See alsoStandard Protections Block Diagram (Page 17)
AppendixA.1 IEEE Device Numbers and Functions
Advanced Motor Protection for Variable Speed Operation170 Manual, AA, A5E46373908A
A.2 AbbreviationsThe following table provides a listing of acronyms / abbreviations used in the manual along with its full nomenclature.
Acronym / Ab‐breviation
Full Phrase
AMP Advanced Motor ProtectionCT Current TransformerDCS Distributed Control SystemDOL Direct-On-LineHMI Human-Machine InterfaceHz HertzMPR Motor Protection RelayPT Potential TransformerRMS Root Mean SquareRTD Resistance Temperature DetectorsVFD Variable Frequency Drive
AppendixA.2 Abbreviations
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 171
AppendixA.2 Abbreviations
Advanced Motor Protection for Variable Speed Operation172 Manual, AA, A5E46373908A
Service and support 1111.1 Field Service Operation
Siemens can provide trained and certified field service representatives to provide technical guidance and assistance for the installation, startup/commissioning, repair and maintenance of Siemens SINAMICS Perfect Harmony™ GH180 VFD equipment and systems. Contact your regional service call center or sales office for details.
For all regional information, use the following link: www.siemens.com/yourcontact
Siemens service call centers can be reached at the regional locations listed below.
DANGER
Untrained personnel performing work on equipment may cause personal injury, death, equipment damage, VFD operational integrity
Ensure that only personnel trained by Siemens work on the equipment.
Certain components described in this documentation may be replaced or repaired only by personnel trained by Siemens.
Work incorrectly performed on the drive can result in damage to the equipment, degrade VFD operational integrity, and possibly cause physical injury to personnel or even death.
Siemens accepts no liability for any damage that occurs because these instructions have not been observed, e.g. if an untrained person carries out a repair or replaces components.
Technical Support (Hotline) ● For emergency service or technical support please call 1-800-333-7421
● America time zone:
Johnson City, TN, USA 800 333 7421 +1 423 262 5710
● Asia and Australia time zone:
Beijing, China +86 400 810 4288
● Europe and Africa time zone:
Nuremberg, Germany +49 911 895 7222 +49 180 5050 222
Technical Support (Internet)Send your inquiries directly via the internet to a specialist in technical support:
https://support.industry.siemens.com/cs/sc?lc=en-WW
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 173
https://www.industry.usa.siemens.com/drives/us/en/electric-drives/Pages/electric-drives.aspx
● Technical support is available round the clock 24 hours / 365 days a year.
● Your inquiries are delivered directly to the responsible specialist.
● Have all relevant data available and technical support can respond to your inquiry as quickly as possible.
● Send records, screen shots and photos to the specialists to support fault analysis.
Service and support11.1 Field Service Operation
Advanced Motor Protection for Variable Speed Operation174 Manual, AA, A5E46373908A
ESD guidelines AA.1 ESD-sensitive Components
Guidelines for Handling Electrostatic Sensitive Devices (ESD)
NOTICE
ESD Sensitive Equipment● Always be aware of electrostatic discharge (ESD) when working near or touching
components inside the VFD cabinet. The printed circuit boards contain components that are sensitive to electrostatic discharge. Handling and servicing of components that are sensitive to ESD should be done only by qualified personnel and only after reading and understanding proper ESD techniques. The following ESD guidelines should be observed. Following these rules can greatly reduce the possibility of ESD damage to printed circuit board (PCB) components.
● Always transport static sensitive equipment in antistatic bags.● Always use a soldering iron that has a grounded tip. Also, use either a metallic vacuum-
style plunger or copper braid when desoldering.● Ensure that anyone handling the printed circuit boards is wearing a properly grounded
static strap. The wrist strap should be connected to ground through a 1 Megohm resistor. Grounding kits are available commercially through most electronic wholesalers.
● Static charge build-up can be removed from a conductive object by touching the object with a properly grounded piece of metal.
● When handling a PC board, always hold the card by its edges.● Do not slide printed circuit boards (PCBs) across any surface (e.g., a table or work bench).
If possible, perform PCB maintenance at a workstation that has a conductive covering that is grounded through a 1 Megohm resistor. If a conductive tabletop cover is unavailable, a clean steel or aluminum tabletop is an excellent substitute.
● Avoid plastic Styrofoam™, vinyl and other non-conductive materials. They are excellent static generators and do not give up their charge easily.
● When returning components to Siemens Industry, Inc. always use static-safe packing. This limits any further component damage due to ESD.
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 175
Components that can be destroyed by electrostatic discharge (ESD)
NOTICE
Electrostatic discharge
Electronic components can be destroyed in the event of improper handling, transporting, storage, and shipping.
Pack the electronic components in appropriate ESD packaging; e.g. ESD foam, ESD packaging bags and ESD transport containers.
To protect your equipment against damage, follow the instructions given below.
● Avoid physical contact with electronic components. If you need to perform absolutely essential work on these components, then you must wear one of the following protective gear:
– Grounded ESD wrist strap
– ESD shoes or ESD shoe grounding strips if there is also an ESD floor.
● Do not place electronic components close to data terminals, monitors or televisions. Maintain a minimum clearance to the screen (> 10 cm).
● Electronic components should not be brought into contact with electrically insulating materials such as plastic foil, plastic parts, insulating table supports or clothing made of synthetic fibers.
● Place components in contact with ESD-suited materials e.g. ESD tables, ESD surfaces, ESD packaging.
● Measure on the components only if one of the following conditions is met:
– The measuring device is grounded with a protective conductor.
– The measuring head of a floating measuring device has been discharged directly before the measurement.
The necessary ESD protective measures for the entire working range for electrostatically sensitive devices are illustrated once again in the following drawings. Precise instructions for ESD protective measures are specified in the standard IEC 61340-5-1.
ESD guidelinesA.1 ESD-sensitive Components
Advanced Motor Protection for Variable Speed Operation176 Manual, AA, A5E46373908A
1 Sitting2 Standing3 Standing/sittinga Conductive floor surface, only effective in conjunction with ESD shoes or ESD shoe grounding
stripsb ESD furniturec ESD shoes or ESD shoe grounding strips are only effective in conjunction with conductive floor‐
ingd ESD clothinge ESD wristbandf Cabinet ground connection
Figure A-1 ESD Protective Measures
ESD guidelinesA.1 ESD-sensitive Components
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 177
ESD guidelinesA.1 ESD-sensitive Components
Advanced Motor Protection for Variable Speed Operation178 Manual, AA, A5E46373908A
Index
AArcing, 14Asynchronous motors, 11Auxiliary power supply, 11
CCabling, 11Commissioning, 11contact
hotline, 173website, 173
EElectrostatic discharge, 175Electrostatic Protective Measures, 177EMC-compliant installation, 11
FFive safety rules, 12Fixed Under Frequency with MSE, Fixed Under Power with MSE, Fixed Over Speed, 31, 54, 56, 57, 134, 135, 136, 137Fixed Pickup Instantaneous Zero Sequence Overvoltage, 128Fixed Pickup Maximum Power Factor, 124Fixed Pickup Minimum Power Factor, 126Fixed Pickup Underfrequency, 143Fixed Under Power with MSE, 48, 58, 80, 82, 130
GGrounding, 11
IIndustrial network, 11Installation, 11
LLock-out / Tag-out procedure, 13
MMain entry, 160
Subentry, 139
SShielding, 11Starts per Hour, 133Synchronous motors, 11
Ttechnical support
hotline, 173Transport, 11
VVariable Pickup Overfrequency, 139Variable Pickup Underfrequency, 137, 145Variable Thermal Overload, 63Variable-Speed Drives, 11
Advanced Motor Protection for Variable Speed OperationManual, AA, A5E46373908A 179
Index
Advanced Motor Protection for Variable Speed Operation180 Manual, AA, A5E46373908A