PlexMan FRE 150 -...

User manual

PlexMan FRE 150

Manual-FRE150-ENG1-r01

Content

Overview ................................................................................................................... 3 1.

1.1 Indications and connections ............................................................................................ 4

1.2 Abbreviations ................................................................................................................. 4

1.3 Technical specification .................................................................................................... 5

Measurement and detection ...................................................................................... 6 2.

2.1 Sensor arrangement ........................................................................................................ 6

Configuration ............................................................................................................ 7 3.

3.1 Parameters tab ............................................................................................................... 7

3.2 Measurement tab ........................................................................................................... 9

3.3 Fault history tab ............................................................................................................ 10

3.4 Wave of device tab ....................................................................................................... 11

Configuration .......................................................................................................... 16 4.

Contact information ................................................................................................ 18 5.


History _________________________________________________________________________________________ Revision Amendment 01 First Revision _________________________________________________________________________________________

Overview 1. The FRE 150 is an advanced fault relay with measurement and calculation functions for LV and MV networks.

The detection part can detect overcurrents and or earth faults with a range of selectable settings to adapt to

the network. Detected faults are recorded in a log consisting of fault type and all associated measured network

parameters with a time stamp. The measurement part can measure and calculate a range of real time network

parameters as well as waveform analysis.

The FRE 150 have 4 CT inputs. 3 phase CT inputs and 1 zero crossing (core balance) CT input. To detect

overcurrent the phase CTs are used. Detecting earth faults can be done using the phase CTs or the zero

crossing CT. Using a zero crossing CT enables detection of very small earth faults that can occur in

compensated networks. The FRE 150 also has 3 phase VT inputs. The FRE 150 have a phase compensation

setting that enables the pickup of voltages after a distribution transformer still using the CTs at the beforehand

switch. Communication/indication is available both as discrete signals and serial data. The discrete signals

consist of 2 relay outputs that activates if overcurrent or earth fault should occur. There are also 2 indication

LEDs to indicate this. The serial data interface consists of a RS232 connection where measurements and

configuration is done over a simplified IEC60870-5-101 link.

FRE 150

FRE 150


Over Current indication

1.1 Indications and connections

Indications Run OK: A blinking green LED indicates that the unit is running ok. Earth fault: The earth fault indication LED is blinking rapidly when an earth fault is detected. After a fault it stays lit until LED is reset. Over current: The over current indication LED is blinking rapidly when an over current is detected. After a fault it stays lit until LED is reset. Alarm outputs The FRE 150 have 2 discrete relay alarm outputs, earth fault and over current. When a fault is detected the outputs will close for a configurable pulse time. The FRE 150 will detect and generate new alarms after the configurable Trip again interval is passed

1.2 Abbreviations Following abbreviations are used in this manual:

FRE – Fault Relay. This unit has all functions of a fault pass indicator plus limited functionality from a

protection relay.

PIU – Protocol Interface Unit. Interface the FRE 150 to a RNO301.

ZCCT – Zero Crossing Current Transformer. Core balance current transformer.

VT Connections

CT Connections

Alarm and Power

Earth Fault indication

In service/Run OK

RS232 Communication

Figure 1. Overview of the FRE 150


1.3 Technical specification Environment Conditions Altitude: <2,000m Ambient temperature: -30°C ~+70°C Storage Temperature: -40°C ~+85°C Humidity: <95% RH Relay output Rated voltage: 250VAC Continuous current: 5A Operating time: 10ms max (typical 5ms) Mechanical life: 5X10e6 Current input (4 channels) Designed for 1A secondary CTs Maximum current on inputs: 25A Burden: < 1VA 3-phase currents & neutral current Voltage input (3 channels)

Voltage: 115VAC or 230VAC Burden: < 1VA Maximum voltage input: 360VAC Power supply input Voltage: 24VDC (18-30VDC) Power consumption: < 1.2W Current measurements RMS(A) & Phase angle: Ia,Ib,Ic RMS(A): In Range: 0.001-25A Accuracy: 0.001-0.1A ±5% / ±1°, 0.1-15A ±0.5% / ±1°, 15-25A ±3% / ±1° Voltage measurement RMS(V): Ua,Ub,Uc Range: 10-360VAC Accuracy: ±0.5% Power measurement Active power(W): a phase, b phase, c phase Reactive power(VAR): a phase, b phase, c phase Phase degree: a phase, b phase, c phase Accuracy: ±1% Power factor: a phase, b phase, c phase Factor Accuracy: ±2% Frequency Reading range: 45-55Hz (50Hz system frequency) 55-65Hz (60Hz system frequency) Accuracy: ±0.02Hz Communication Type: RS-232 (optically isolated) Connector DB9 male connector: TXD(2),RXD(3),GND(5) Baud rate: 9600bps Protocol: IEC60870-5-101 (simplified) LED indications 1 green LED: Running OK 2 red LED: Optional indication for Earth fault or Overcurrent fault. Event recording Log size: Minimum 100 fault events Log type: FIFO

Log info: All measured data is stored with time stamp at fault event Configuration/testing PC program with configuration and access to all data via communication interface


Measurement and detection 2. The FRE 150 is designed to measure values and detect faults in a MV/LV network. It is very configurable regarding type of sensor arrangement (VTs/CTs) and also flexible so you can adapt it to the present requirements. Therefore it is possible to make the deployment cost adaptive. Beside the measured values the FRE 150 can also calculate several network values. The values it can present are:

3 x phase current 3 x phase voltage 3 x phase angle voltage/current 3 x phase power 3 x phase reactive power 3 x phase power factor 3 x phase current direction

Earth current Frequency Waveform shots

The fault scenarios it can detect are:

Earth fault Overcurrent

2.1 Sensor arrangement Depending on what is required to measure, detect and the electrical networks characteristics different sensor options can be used. For voltage measurements 1-3 phase voltages can be connected. This could be done using 1-3 separate VTs or using a 3-phase VT. There is a configurable compensation setting enabling the use of a distribution transformer after a switch with built in CTs to compensate for the phase error introduced. Depending on how many VTs you connect some functions/measurements may be omitted. For full functionality all 3 phase voltages must be connected. The VTs are connected to a four pole connector (phase a, phase b, phase c and neutral). For current measurements there are 4 input channels, 3 phase CT channels and 1 zero crossing CT channel. With 3 phase CTs connected full functionality can be achieved, both overcurrent detection, earth fault detection and full measurements. The earth fault/current is then calculated as the unbalance between the 3 phases. If you need to measure/detect very small earth faults a zero crossing CT should be used. This will be able to very exact detect very small earth faults which is not possible with the 3 phase CTs if the ratio is to high. The CT inputs are of direct type, i.e. it will take the primary CT directly into its secondary on board CT. Examples of sensor arrangement:

3 x phase CTs, 3 x phase VTs, zero crossing CT - This enables the full functionality of the FRE 150 with full detection and measurements.

Zero crossing CT - A simple earth fault detector with very limited measurements. 2x phase CTs, zero crossing CT - Function as an advanced FPI with overcurrent and earth fault

detection. Limited measurements.

Safety note! Special consideration should be taken when working with CTs in a network. Never leave secondary side of connected CTs open as lethal high voltage could occur.


Configuration 3. The configuration of the FRE 150 is done via the PC program FPI-2 tester. This program has the following main features:

Configuration of all configurable parameters. Make and check all possible measurements. Work with the fault history log. Perform graphical wave inspection (I,U and phase).

1. Start the FPI-2 Tester program on your PC. 2. Connect the PC to the FRE 150 using a serial cable (possibly through an USB converter). 3. Select and open the com port attached to the FRE 150. 4. Press the read parameters button on the parameters tab. Check that no error messages are shown in

the IEC status window at the bottom. 5. You are now ready to configure the FRE 150.

3.1 Parameters tab In the parameter tab all settings regarding currents, CTs, detection curves and detection behaviour is made. The setting function is not “online” so you start by pressing the read parameters button to read all parameters from the FRE 150. If you change anything on the screen you need to press the write parameter button to write the new settings down to the FRE 150. It is advisable to check that settings are accepted by pressing read parameter and verify settings.

Figure 2. Overview of the FPI-2 Tester program


Below is a description of the buttons that is shown in figure above.

Name Description

Set Date Time This will set the FRE 150 real time clock with the PCs time and date.

Read Date Time This will read the FRE 150 time and date and display it on screen.

Write parameters This will write and save on screen settings to the FRE 150.

Read parameters This will read the parameters in the FRE 150 and display on screen.

Clear This will clear the IEC communication / status window at the bottom.

Search device This will search for the IEC address of a connected device and display it.

Open/close port This will open or close the selected communication port.

Name Description Range

Overcurrent phase CTs

Istart_abc Setting for overcurrent detection 20-10000A

Kabc Curve constant selector (tp) 0.05-5

Curves_abc Selection of detection curve Inverse, very inverse and extremely inverse

CT_abc ratio Setting of the phase CTs ratio 20-500:1

Phase compensation Static phase compensation U/I -90°- 90°

Software/communication

Version Software version of FRE 150 No setting

Address IEC address of the FRE 150 1-255

Earth fault – zero crossing CT

Istart_0 Setting for the earth fault detection 1-2000A

K0 Curve constant selector (tp) 0.05-5

Curves_0 Selection of detection curve Inverse, very inverse and extremely inverse

CT_0 ratio Setting of the zero crossing CT ratio.

20-500:1 Note! If synthetic I0 source is used this ratio will be copied from the CTabc ratio

I0 Source Selection of earth fault detection method. Synthetic to be used with calculation of 3 phase CTs unbalance. Individual to be used if a zero crossing CT is used

Individual or synthetic

Misc setting

Filter time A filter time that delays fault indication after a detected fault

0-65000ms

Pulse width Pulse length of fault indication relays

50-65000ms

Trip again interval Filter time to allow new fault detection

1-65s

Frequency Network system frequency 50 or 60Hz

Led Display Exchange the meaning of fault indication LEDs. Should be set to normal

Normal or exchange


3.2 Measurement tab In the measurement tab live measurements/calculations can be performed and displayed. If Measure button is

pressed a single measurement/calculation is done and displayed on screen. If continuous measurements are

needed, set an interval time and press the start/Rep-measure button. Now a new measurement/calculation is

done at the set interval and displayed on screen until the stop button is done. To start continuous measurement

at a very low interval time and at the same time write parameters to the unit is not recommended as data

losses may occur.

The checkbox Primary Iabc toggles between actual secondary current seen by the unit and calculated primary

current by the selected CT ratio in the parameters tab.

The information displayed consists of: For phase a, b and c:

Phase voltage Phase current Phase active power Phase reactive power Phase angle voltage/current Phase power factor Phase current direction flow

Displayed is also:

Earth current Frequency (Ua)

Note!

In the measurement tab, direction of Ia, Ib and Ic are measured and shown as positive of negative. Note that it

is not a setting even if they have a drop down arrow next to them. They indicate the measured current flow

direction.

Figure 3. Measurement tab for the FPI-2 Tester program


3.3 Fault history tab The fault history tab manages the fault log in the FRE 150. At every fault occurrence, according to the detection settings, a record is made in the fault log. The fault log can store up to 100 fault events and is of FIFO type (i.e. if log file is full then the oldest record is moved out to make room for the newest). The fault log stores all measured and calculated values together with fault type identification and timestamp when a fault occurs. A fault record will consist of:

Sequence number Date and time Fault type and detail Frequency Phase a voltage Phase a current Phase a active power Phase a reactive power Phase a current direction Phase a voltage/current angle Phase a power factor Phase b voltage

Phase b current Phase b active power Phase b reactive power Phase b current direction Phase b voltage/current angle Phase b power factor Phase c voltage Phase c current Phase c active power Phase c reactive power Phase c current direction Phase c voltage/current angle Phase c power factor Earth current

On the Fault History tab there are 3 command buttons available:

Name Description

Reset Led This will turn off the fault indication LEDs if a fault have occurred.

Clear Record This button will erase the complete fault log. Note this command is instant and permanent!

Read Record This button will read the fault log from the FRE 150 and display on screen.

Figure 4. Fault history tab for the FPI-2 Tester program


3.4 Wave of device tab The wave of device tab enables graphical wave analysis of the network. When a measurement is done the FRE 150 collects 10 cycles from the network with 32 samples per cycle and displays the selected waveform(s) on screen for analysis.

The actions that can be performed in the wave of device tab are: Read - Pressing this button will perform a measurement and display selected waves. Wave of - This drop down box chooses the curves to be displayed. Display choices: - Phase Ia - Phase Ib - Phase Ic - Phase I0 - Phase Ua - Phase Ub - Phase Uc - Phase U0 - Ua & Ia - Ub & Ib - Uc & Ic - U0 & I0 The following command buttons are displayed in the upper left corner:

- Scroll X/Y axis

- Zoom X/Y axis

- Zoom out

- Zoom in

- Zoom in on selected area.

- Enable X and Y cursor lines for detailed measurements.

Note! The wave analysis data is available in the communication interface for advanced SCADA users.

Figure 5. Wave tab


Appendix A – Detection curves Normal Inverse


Very inverse


Extremely inverse


Appendix B – PIU 160 - RNO301 interface unit The purpose of the PIU is to convert analogue values from the new FRE 150, which uses a limited version of IEC60870-5-101, into a protocol which the RNO301 (manufactured by Radius) is able to understand. The RNO301 supports a module named ADAM-4017 which is a 16-bit, 8-channel analogue input module.

The objects that are to be polled from the FRE 150 are voltage, current and phase angle for each of the 3 phases. This means that there are 9 objects to poll. The Radius RNO301 supports maximum 8 analogue objects which are sent over the radio as 12-bit values, so these 9 objects are compressed in a way that the RNO301 can handle. The values are then uncompressed in the CCU. NOTE! A CCU from Smart Grid Networks must be used that supports the uncompression. The PIU 160 has 2 RS232 ports, one for the FRE 150 and one for the RNO301. In order to access the test menu of the PIU 160, a mechanism for detecting keystrokes on one port during start up is implemented. This means that in order to enter the test menu of the PIU 160, power has to be switched off and on.

Connections

PIU 160 have one digital input and 3 digital outputs. The input is opto isolated unipolar and has an input voltage from 7-35VDC. The input function is to activate LED reset on FRE 150. The outputs are latching relays with contact rating 30VDC 1A, 125VAC 0,5A. The outputs are used for current direction indication or other alarm information from FRE 150.

Name Description

P1 – COM1 Communication port 1 for communication with RNO301

P2 – COM2 Communication port 2 for communication with FRE 150

P3 – PWR Power supply connector. 7-35VDC, max 600mW, typical 200mW

P4 – I/O connector

RNO301 PIU 160 FRE 150 ”IEC101””

RS232 (9600bps)

RS232 (1200-

38400bps)

AIN module protocol


Indications Status - Blue LED showing the status of the unit. Blinking is OK. Activity - White LED indicating communication activity. Technical data CPU: 16bit 24F32KA302 RAM: 2kB Flash: 32kB EEPROM: 512B Supply voltage: 7-35VDC Power: Typical 200mW, max peak 600mW Protection: Reversed voltage, over voltage (@39VDC), current limitation 0.45A with polyfuse, ESD protection on communications ports (15kV). Digital input: Unipolar 7-35VDC, opto isolated Digital outputs: 3 x latching relays, rating 30VDC 1A, 125VAC 0.5A Dimensions: 67x77x45mm

Configuration 4. RNO301 Configuration of the RNO301 should be done according to its user manual. To use the PIU 160 with a RNO301 the following configuration of the RNO301 needs to be done:

Enable all 8 analogue channels. Set poll rate to 1 second. Set dead banding to zero or lowest.

PIU 160 The PIU 160 doesn’t need to be configured if it is used in a standard way. To perform testing and fault finding there is a test menu interface in the PIU 160. This test menu can be accessed by performing the following actions:

Connect a serial cable between a PC and COM1 on the PIU 160 (null modem type). Start a terminal program (TeraTerm or similar) with settings 9600N81. Power up the PIU 160.

When the PIU 160 powers up a startup menu is shown: ###########################################################

PIU160S

Copyright Smart Grid Networks

Software: PIU160S v0.0.1 Build Jul 6 2012

Article No Softw Id Hardw Id HardwRev CRC

1782000-4 0xAB 0x41 0x01 0x50C4

Date Time Input1

12-01-01 12:00:00 0

###########################################################

Press 'space' for configuration mode

To enter test mode, space should be pressed within 2 seconds.

Pin Function Description from PIU 160 Remark

1 DI1 In Reset FRE 150 alarm LEDs

2 DI1 com In Common for inputs

3 DO1 Out Current direction Ia

4 DO2 Out Current direction Ib

5 DO3 Out Current direction Ic

6 DO com Out Common for outputs


When space is pressed the test menu is shown: ###########################################################

PIU160S

Copyright Smart Grid Networks

Software: PIU160S v0.0.1 Build Jul 6 2012

Article No Softw Id Hardw Id HardwRev CRC

1782000-4 0xAB 0x41 0x01 0x50C4

Date Time Input1

12-01-01 12:00:12 0

###########################################################

######################### Main ##########################

1 - Set Relay1

2 - Set Relay2

3 - Set Relay3

L - FPI Link test

M - Read FPI Measurements

P - Read FPI Parameters

E - Exit

In the header, status of input1 can be read. Menu choices 1-3 performs toggle of the 3 outputs for test purposes. L – FPI Link test performs an IEC link test between the PIU 160 and the FRE 150 to verify the link. M – Read FPI Measurements will read and display the current measurements from the FRE 150 on screen. P – Read FPI Parameters will read all configured parameters in the FRE 150 and display on screen. E – Exit will exit the test menu and start normal execution of the PIU 160 program.


Contact information 5. Operator: +46 455 600 100 www.smartgridnetworks.net

http://www.smartgridnetworks.net/

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