R6522D KVTR

Scheme DescriptionKVTR 100

Auto Reclose Relay

Scheme DescriptionKVTR 100

Auto Reclose Relay

HANDLING OF ELECTRONIC EQUIPMENT

A person's normal movements can easily generate electrostatic potentials of several thousand volts.Discharge of these voltages into semiconductor devices when handling electronic circuits can causeserious damage, which often may not be immediately apparent but the reliability of the circuit will havebeen reduced.

The electronic circuits of ALSTOM T&D Protection & Control Ltd products are immune to the relevantlevels of electrostatic discharge when housed in their cases. Do not expose them to the risk of damageby withdrawing modules unnecessarily.

Each module incorporates the highest practicable protection for its semiconductor devices. However, if itbecomes necessary to withdraw a module, the following precautions should be taken to preserve thehigh reliability and long life for which the equipment has been designed and manufactured.

1. Before removing a module, ensure that you are at the same electrostatic potential as the equipmentby touching the case.

2. Handle the module by its front-plate, frame, or edges of the printed circuit board.Avoid touching the electronic components, printed circuit track or connectors.

3. Do not pass the module to any person without first ensuring that you are both at the sameelectrostatic potential. Shaking hands achieves equipotential.

4. Place the module on an antistatic surface, or on a conducting surface which is at the samepotential as yourself.

5. Store or transport the module in a conductive bag.

More information on safe working procedures for all electronic equipment can be found in BS5783 andIEC 60147-0F.

If you are making measurements on the internal electronic circuitry of an equipment in service, it ispreferable that you are earthed to the case with a conductive wrist strap.Wrist straps should have a resistance to ground between 500k – 10M ohms. If a wrist strap is notavailable, you should maintain regular contact with the case to prevent the build up of static.Instrumentation which may be used for making measurements should be earthed to the case wheneverpossible.

ALSTOM T&D Protection & Control Ltd strongly recommends that detailed investigations on the electroniccircuitry, or modification work, should be carried out in a Special Handling Area such as described inBS5783 or IEC 60147-0F.

CONTENTS

SAFETY SECTION 61. APPLICATION AND BASIC OPERATING SEQUENCE 101.1 Operating sequence 102. MAIN OPERATING FEATURES 102.1 Instantaneous trips selector 102.2 Maintenance alarm 112.3 Maintenance lockout 112.4 Auto reclose initiation inhibit for a pre-selected time TMR Mancl

AR Inh, following manual CB closing, or following energisationof a previously dead line. 11

2.5 Cold load pick-up logic 122.6 Excessive fault frequency lockout 122.7 Line voltage interlock 122.8 Reset from lockout 122.9 Omit first shot of programmed cycle if selected protection operates 122.10 Successful auto-reclose indication 122.11 CB failed to close alarm 132.12 Input mode selection 132.13 In and out of service switching 132.14 Auto reclose without protection operation 132.15 Auto reclose initiation with CB initially open 132.16 Dead time start without protection reset 132.17 First reclosure without system check 132.18 Maintained close pulse 142.19 Fault not cleared alarm 143. SCHEME INPUTS 144. USER INPUTS 155. SCHEME OUTPUTS 156. CONTROL OUTPUTS 167. PLANT STATUS OUTPUTS 168. SOFTWARE LOGIC FUNCTIONS 178.1 Menu Cell 0A01 – Scheme Fn Links 1 178.2 Menu Cell OAO2 – Scheme Fn Links 2: 189. TIMER SETTING RANGES 1910. COUNTERS 2010.1 Counter registers (coils/resets) 2010.2 Counter settings (targets) 2010.3 Counter values (messages) 2011. SCHEME ALARMS 2112. EVENT RECORDS 21

REPAIR FORM 23

SAFETY SECTION

This Safety Section should be read before commencing any work on the equipment.

Health and safety

The information in the Safety Section of the product documentation is intended toensure that products are properly installed and handled in order to maintain themin a safe condition. It is assumed that everyone who will be associated with theequipment will be familiar with the contents of the Safety Section.

Explanation of symbols and labels

The meaning of symbols and labels which may be used on the equipment or inthe product documentation, is given below.

Caution: refer to product documentation Caution: risk of electric shock

Protective/safety *earth terminal

Functional *earth terminal.Note: this symbol may also be used for a protective/safety earth terminal if that terminal is part of aterminal block or sub-assembly eg. power supply.

*Note: The term earth used throughout the product documentation is the directequivalent of the North American term ground.

Installing, Commissioning and ServicingEquipment connections

Personnel undertaking installation, commissioning or servicing work on thisequipment should be aware of the correct working procedures to ensure safety.The product documentation should be consulted before installing, commissioningor servicing the equipment.

Terminals exposed during installation, commissioning and maintenance maypresent a hazardous voltage unless the equipment is electrically isolated.

If there is unlocked access to the rear of the equipment, care should be taken byall personnel to avoid electric shock or energy hazards.

Voltage and current connections should be made using insulated crimpterminations to ensure that terminal block insulation requirements are maintainedfor safety.To ensure that wires are correctly terminated, the correct crimp terminal and toolfor the wire size should be used.

Before energising the equipment it must be earthed using the protective earthterminal, or the appropriate termination of the supply plug in the case of plugconnected equipment. Omitting or disconnecting the equipment earth may causea safety hazard.

The recommended minimum earth wire size is 2.5 mm2, unless otherwise statedin the technical data section of the product documentation.

Before energising the equipment, the following should be checked:

Voltage rating and polarity;

CT circuit rating and integrity of connections;

Protective fuse rating;

Integrity of earth connection (where applicable)

Equipment operating conditions

The equipment should be operated within the specified electrical andenvironmental limits.

Current transformer circuits

Do not open the secondary circuit of a live CT since the high voltage producedmay be lethal to personnel and could damage insulation.

External resistors

Where external resistors are fitted to relays, these may present a risk of electricshock or burns, if touched.

Battery replacement

Where internal batteries are fitted they should be replaced with therecommended type and be installed with the correct polarity, to avoid possibledamage to the equipment.

Insulation and dielectric strength testing

Insulation testing may leave capacitors charged up to a hazardous voltage. Atthe end of each part of the test, the voltage should be gradually reduced to zero,to discharge capacitors, before the test leads are disconnected.

Insertion of modules and pcb cards

These must not be inserted into or withdrawn from equipment whilst it isenergised, since this may result in damage.

Fibre optic communication

Where fibre optic communication devices are fitted, these should not be vieweddirectly. Optical power meters should be used to determine the operation orsignal level of the device.

Older ProductsElectrical adjustments

Equipments which require direct physical adjustments to their operatingmechanism to change current or voltage settings, should have the electrical powerremoved before making the change, to avoid any risk of electric shock.

Mechanical adjustments

The electrical power to the relay contacts should be removed before checking anymechanical settings, to avoid any risk of electric shock.

Draw out case relays

Removal of the cover on equipment incorporating electromechanical operatingelements, may expose hazardous live parts such as relay contacts.

Insertion and withdrawal of extender cards

When using an extender card, this should not be inserted or withdrawn from theequipment whilst it is energised. This is to avoid possible shock or damagehazards. Hazardous live voltages may be accessible on the extender card.

Insertion and withdrawal of heavy current test plugs

When using a heavy current test plug, CT shorting links must be in place beforeinsertion or removal, to avoid potentially lethal voltages.

Decommissioning and DisposalDecommissioning: The auxiliary supply circuit in the relay may include

capacitors across the supply or to earth. To avoid electricshock or energy hazards, after completely isolating thesupplies to the relay (both poles of any dc supply), thecapacitors should be safely discharged via the externalterminals prior to decommissioning.

Disposal: It is recommended that incineration and disposal to watercourses is avoided. The product should be disposed of in asafe manner. Any products containing batteries shouldhave them removed before disposal, taking precautions toavoid short circuits. Particular regulations within thecountry of operation,may apply to the disposal of lithiumbatteries.

Technical SpecificationsProtective fuse rating

The recommended maximum rating of the external protective fuse for thisequipment is 16A, Red Spot type or equivalent, unless otherwise stated in thetechnical data section of the product documentation.

Insulation class: IEC 61010-1: 1990/A2: 1995 This equipment requires aClass I protective (safety) earthEN 61010-1: 1993/A2: 1995 connection to ensure userClass I safety.

Installation IEC 61010-1: 1990/A2: 1995 Distribution level, fixedCategory Category III installation. Equipment in(Overvoltage): EN 61010-1: 1993/A2: 1995 this category is qualification

Category III tested at 5kV peak, 1.2/50µs,500Ω, 0.5J, between all supplycircuits and earth and alsobetween independent circuits.

Environment: IEC 61010-1: 1990/A2: 1995 Compliance is demonstrated byPollution degree 2 reference to generic safetyEN 61010-1: 1993/A2: 1995 standards.Pollution degree 2

Product safety: 73/23/EEC Compliance with the EuropeanCommission Low VoltageDirective.

EN 61010-1: 1993/A2: 1995 Compliance is demonstratedEN 60950: 1992/A11: 1997 by reference to generic

safety standards.

This scheme description should be read in conjunction with Service ManualR8505, which gives a general description of relay hardware and instructions forinstallation, commissioning, maintenance and setting procedures for all K-seriesauto reclose and check synchronism relays.

The following description refers to ladder logic inputs and outputs, which can bemasked to opto inputs and output relays as required for a specific application.Please refer to Service Manual R8505 for full details of relay inputs and outputs.

Section 1. APPLICATION AND BASIC OPERATING SEQUENCE

The KVTR 100 auto reclose relay provides multi-shot three phase auto reclosecontrol for distribution and transmission systems. It can be adjusted to perform asingle shot, two shot, three shot or four shot cycle. Dead times for all shots (recloseattempts) are independently adjustable.

1.1 Operating sequence

An auto reclose cycle is initiated by operation of a protective relay, provided thecircuit breaker is closed until the instant of protection operation. Dead time (TMRDead time 1, 2, 3 or 4) starts when the circuit breaker has tripped and theprotection has reset. At the end of the dead time, a CG close signal is given(output RLY CB Close Sig), provided input signals are present indicating thatsystem conditions are suitable (INP Safe to Close), and the circuit breaker closingspring, or other energy source, is fully charged (INP Spring Charg). The safe toclose signal is taken from a contact on a separate voltage monitor or synchronismcheck relay, and the spring charged signal is taken from an auxiliary switchcontact on the circuit breaker. The CB close signal is cut off when the circuitbreaker closes.

When the circuit breaker closes, the reclaim time starts (TMR Reclaim Time). If thecircuit breaker does not trip again, the relay resets at the end of the reclaim time.If the protection operates again and the circuit breaker trips once more before thereclaim time has elapsed, the relay either advances to the next shot in theprogrammed auto reclose cycle, or, if all programmed reclose attempts have beenmade, goes to lockout.

Section 2. MAIN OPERATING FEATURES

2.1 Instantaneous trips selector

A “Block Instantaneous Trips” output can be arranged to block the trip function ofnon-discriminating protection, such as low set instantaneous overcurrent or earthfault protection, or distance protection operating with Zone 1 extension. This canbe set to operate after one, two, three or four trips (CNS Inst Trips), and will thenremain operated until the end of the auto reclose cycle, to ensure that the finaltrip to lockout for a persistent fault is made by discriminating protection, such asIDMT, or plain distance with conventional zone 1 reach. If this feature is notrequired, it can be effectively disabled by setting the target to five trips, so that itnever operates.

The normal arrangement for this feature is for the output relay to be normallyreset, and to operate (contact closes) to block non-discriminating protection (relaymasked to output RLY Block InstPr).

This is suitable for most modern protective relays such as Optimho and KCGG.For applications which require a normally closed contact which opens to inhibittripping, the output relay can be arranged to be normally operated (contactclosed), and to reset (contact opens) to block the protection trip output (relaymasked to output RLY Enable Inst).

A second, independently adjustable, instantaneous trips selector is available(relay masked to output RLY Blk SEF Inst or RLY SEF Inst OK), for applicationswhere sensitive earth fault protection is required to initiate auto reclosing, withshort time SEF protection tripping being blocked after one, two, three or four trips(CNS SEF InsTrips). Separate logic inputs are available for long time SEF andshort time (nominally instantaneous) SEF protection.

The operating logic allows for operation of the reclaim timer to be suspended byan input from low set instantaneous protection after CB reclosure, if the “BlockInstantaneous Trips” or “Block Short Time SEF Trips” output is operated. Thisensures that the reclaim time cannot time out and reset the relay before the timedelayed protection trip has operated, and so allows reclaim time settings shorterthan the time delayed protection operating time. Short reclaim time settings canhelp to prevent unnecessary lockout for a succession of transient faults in a shortperiod, for example during a thunderstorm. If a long reclaim time setting ischosen (ie. Longer than the maximum possible operating time of time delayedprotection), this feature may be disabled by setting scheme function link 1/E to 1,to avoid unwanted extension of the effective reclaim time due to a fault clearedby time delayed protection on a downstream circuit breaker

2.2 Maintenance alarm

The relay maintenance alarm output RLY Maint Alarm operates after a pre-selected number of fault trips (CNS Maint Alarm). This feature is purely forindication, and does not initiate a lockout. The fault trips counter (maintenancecounter) is incremented when the CB trips as a result of any protection operation.An ‘INP Non AR Protn’ input is provided so that the counter can be incrementedwithout initiating auto reclose, for example by sensitive earth fault protection,busbar protection, or breaker fail protection from another CB on the busbar. Themaintenance counter register can be reset to zero either through ladder ligicinput INP Reset M Cntr, if mask selected to an opto input, or via the ResetCounters menu item in the user interface.

2.3 Maintenance lockout

This is enabled by software function link selection. When enabled, this featurelocks out auto reclosing, operates output RLY Maintlockout for indication purposes,and triggers a scheme alarm, after a pre-selected number of fault trips (CNSMaintLockout). The maintenance lockout target is adjustable independently of themaintenance alarm target.

2.4 Auto reclose initiation inhibit for a pre-selected time TMR Mancl ARInh, following manual CB closing, or following energisation of apreviously dead line.

These features can be independently enabled or disabled by software functionlinks. Line status information is derived from a contact on a separate line voltagemonitor relay (input INP LineVolt Mon).

2.5 Cold load pick-up logic

This is enabled by software function link selection. When enabled, this featureoperates output RLY C.Ld Pickup, to block selected protection for a period TMRC.Ld Pickup following manual CB closing, an inhibits auto reclose initiation fromselected protection during the same period.

2.6 Excessive fault frequency lockout

This is enabled by software function link selection. When enabled this featurelocks out auto reclosing and operates output RLY Exc Flt Frq for indicationpurposes, if a pre-selected number of fault trips (CNS Exc Flt Freq) occurs duringa short period (TMR Exc Flt Frq), such as may happen during a severe lighteningstorm.

2.7 Line voltage interlock

This is enabled by software function link selection. When enabled, this featureinserts additional checks in the auto reclose initiation and dead time start logic,such that an auto reclose cycle can be initiated only if the line was live untilimmediately before the protective relay operation, and the dead time cannot startuntil the line has gone dead. Line status information is derived from input INPLineVolt Mon, (see Section 2.4). This logic includes an adjustable memory timerTMR Linev Memory, in case the line voltage drops due to the fault, before theprotective relay operated to initiate auto reclosing.

2.8 Reset from lockout

Once the condition which caused the lockout is no longer active, the relay can bereset by any of the following methods:

a) automatically after time TMR Mancl AR Inh after CB manual close, ifsoftware function link 9 is set to 1

b) automatically after time TMR Autoreset, irrespective of CB operation, ifsoftware function link 8 is set to 1.

c) user input USR Resetlockout.

d) logic input INP Resetlockout, if mask selected to an opto input.

2.9 Omit first shot of programmed cycle if selected protection operates

This feature is enabled by setting input masks such that logic input INP Omit 1st

Sht is activated by the same opto input as the selected protection. This allows therelay to give a high speed auto reclose following, say, instantaneous protectionoperation, or a delayed auto reclose following time delayed protection operation.

2.10 Successful auto-reclose indication

(Relay mask RLY A/R Success, and control output CTL A/R Success).

This operates if the circuit breaker is closed when the reclaim timer times out toreset the relay. Relay mask RLY A/R success, and it’s assigned output relay, if any,resets after 2 seconds (fixed pulse time). Control output CTL A/R success resets atthe next circuit breaker trip, or can be reset via logic input INP Reset Indicn (ifmask selected), or user input USR Reset Indicn, without waiting for the circuitbreaker to trip.

2.11 CB failed to close alarm

(Relay mask RLY CB Failclose, control output CTL CB Failclose, and alarmindication).

This alarm operates and scheme lockout is triggered, if the circuit breaker doesnot close within a period equal to TMR Close Pulse setting when the signal RLY CBClose Sig is given. Relay mask RLY CB Failclose, its assigned output relay andcontrol output CTL CB Failclose, reset after 2 seconds (fixed pulse time). Thescheme is reset from lockout. The relay local alarm (flashing red LED and LCDmessage) is reset by pressing the (0) key when prompted.

2.12 Input mode selection

Contacts on external equipment providing some of the input signals to the KVTR100 can be either normally open or normally closed; the logic being adjusted asrequired by software logic function link settings. The selectable inputs are listedbelow:

INP CB AuxSwitch, selected by Scheme FN Link 1/0 = 1 or 0.

INP Spring Charg, selected by Scheme Fn Link 1/1 = 1 or 0.

INP Safe to Close, selected by Scheme Fn Link 1/2 = 1 or 0.

INP Block AR, selected by Scheme Fn Link 1/3 = 1 or 0.

2.13 In and out of service switching

The scheme can be switched in or out of service, either by external inputs INPRemSw Inserv and INP RemSw Outsrv, if mask selected, or by user inputs USR SwoutofServ.

2.14 Auto reclose without protection operation

If Scheme Fn Link 1/4 is set to 1, an auto reclose cycle can be initiated by anyCB trip, without reference to protection, which may be useful during testing orcommissioning.

2.15 Auto reclose initiation with CB initially open

If Scheme Fn link 1/5 is set to 1, an auto reclose cycle can be initiated byprotection operation even if the CB is initially open, which may be useful duringtesting or commissioning.

2.16 Dead time start without protection reset

If scheme Fn Link 1/f is set to 1, the dead time starts as soon as the CB trips,without waiting for the protection to reset. This option may be preferred if theprotection does not have a fast consistent reset time.

2.17 First reclosure without system check

If Scheme Fn Link 2/0 is set to 1, the first reclose attempt, after Dead Time 1, ismade without checking for a “safe to close” signal. This may be preferred whenhigh speed reclosing is applied (TMR Dead Time 1 < 1.00s), to avoid the extradelay which may be inherent in an external synchronism check relay. Subsequentreclose attempts in a multi-shot auto reclose cycle will still require a “safe to close”signal.

2.18 Maintained close pulse

If Scheme Fn Link 1/D is set to 1, the CB close signal is not cut off when the CBcloses, but is maintained for the set TMR Close Pulse time, which may benecessary for some types of CB closing mechanism. The scheme includes anti-pumping logic which will be cut off the CB close signal if the protection re-operates or the CB re-trips before the set close pulse time has elapsed.

(i) only when the scheme is switched out of service, or(ii) with the scheme either in or out of service.

2.19 Fault not cleared alarm

This alarm operates and scheme lockout is triggered, if the CB does not trip, orthe protection input does not reset, within a period equal to TMR Tripfail Timesetting following auto reclose initiation.

Section 3. SCHEME INPUTS

The KVTR relay has eight opto-isolator input circuits, but the ladder logic hassixteen inputs. The actual inputs required for any specific application are selectedby setting a mask to assign one or more of the opto inputs to each requiredladder input. Although most selections are one-to-one, parallel mask settings arepossible. A single opto input can activate more than one ladder input, and asingle ladder input may be activated by more than one opto input.

The available logic inputs, and the “default” mask settings applied in the factory,are given below:

Display name Default mask setting. Associated opto-input.

INP CB AuxSwitch 0 0 0 0 0 0 0 1 Opto 0

INP Inst Protn 0 0 0 0 0 0 1 0 Opto 1

INP Main Protn 0 0 0 0 0 1 0 0 Opto 2

INP Spring Charg 0 0 0 0 1 0 0 0 Opto 3

INP Safe to Close 0 0 0 1 0 0 0 0 Opto 4

INP Non AR Protn 0 0 1 0 0 0 0 0 Opto 5

INP Block AR 0 1 0 0 0 0 0 0 Opto 6

INP ResetLockout 1 0 0 0 0 0 0 0 Opto 7

INP Reset Indicn 0 0 0 0 0 0 0 0 None

INP Reset M Cntr 0 0 0 0 0 0 0 0 None

INP Omit 1st Sht 0 0 0 0 0 0 0 0 None

INP RemSw Inserv 0 0 0 0 0 0 0 0 None

INP RemSw Outsrv 0 0 0 0 0 0 0 0 None

INP LineVolt Mon 0 0 0 0 0 0 0 0 None

INP Inst. SEF 0 0 0 0 0 0 0 0 None

INP Sensitive EF 0 0 0 0 0 0 0 0 None

Section 4. USER INPUTS

Up to sixteen user inputs are available through the user interface (relay keypad orremote control via K-bus). Please refer to Service Manual R8505 Sections 5.1.2and 6.1.2 for details. The standard KVTR100 scheme includes four user inputs asfollows:

Display name. Effect in scheme logic

USR Switch inSrv Switch scheme in to service

USR Sw outofServ Switch scheme out of service

USR ResetLockout Reset scheme lockout

USR Reset Indicn Reset “Successful AR” or “CB Failed to Close" alarm

Section 5. SCHEME OUTPUTS

The KVTR relay has eight output relays each with one normally open contact, plusa watchdog output with one normally open and one normally closed contact.

The application software has sixteen logic outputs. The actual outputs required forany specific application are selected by setting a mask to assign one or more ofthe output relays to each required logic output. Although most selections are one-to-one, parallel mask settings are possible. A single output relay may be activatedby more than one logic output, and a single logic output can activate more thanone output relay.

The available logic outputs, and the “default” mask settings applied in thefactory, are given below:

Display Name Default mask setting Associated output relay

RLY A/R in Prog 0 0 0 0 0 0 0 1 RL 0

RLY CB Close Sig 0 0 0 0 0 0 1 0 RL 1

RLY AR Available 0 0 0 0 0 0 0 0 None

RLY Block InstPr 0 0 0 0 1 0 0 0 RL 3

RLY Maint Alarm 0 0 0 1 0 0 0 0 RL 4

RLY MaintLockout 0 0 1 0 0 0 0 0 RL 5

RLY Exc Flt Frq 0 1 0 0 0 0 0 0 RL 6

RLY CB Failclose 1 0 0 0 0 0 0 0 RL 7

RLY C.Ld Pickup 0 0 0 0 0 0 0 0 None

RLY A/R Lockout 0 0 0 0 0 1 0 0 RL 2

RLY ManCl AR Inh 0 0 0 0 0 0 0 0 None

RLY OutOfService 0 0 0 0 0 1 0 0 RL 2

RLY Enable Inst 0 0 0 0 0 0 0 0 None

RLY Blk SEF Inst 0 0 0 0 0 0 0 0 None

RLY SEF Inst OK 0 0 0 0 0 0 0 0 None

RLY A/R Success 0 0 0 0 0 0 0 0 None

Section 6. CONTROL OUTPUTS

Up to sixteen “control outputs” are available for relay status indications throughthe user interface. Refer to Service Manual R8505 (System data, cell 000D – SYScontrol status). The standard KVTR100 scheme provides fourteen control outputs,as follows:

Display name Scheme logic status

CTL DT In Prog Dead Time in progress

CTL Rcl In Prog Reclaim time in progress

CTL A/R Lockout Scheme lockout

CTL Maint Alarm Maintenance Alarm (pre-lockout warning)

CTL MaintLockout Maintenance lockout

CTL Block InstPr Block non-discriminating protection(eg. low set inst OC or EF)

CTL Exc Flt Frq Excessive fault frequency

CTL OutofService AR switched out of service

CTL CB Failclose CB failed to close

CTL CldLd Pickup Cold load pickup timer running

CTL ArinProgress AR cycle in progress – initiation to reset or lockout

CTL ManCl AR Inh AR initiation after manual CB close

CTL Blk SEF Inst Block instantaneous SEF tripping

CTL A/R Success Successful auto reclose

Section 7. PLANT STATUS OUTPUTS

Please refer to Service Manual R8505 (System data, cell 000C – SYS plantstatus). The standard KVTR100 scheme includes only one plant status output,CB1.

Section 8. SOFTWARE LOGIC FUNCTIONS

Up to 32 logic function can be included in K-series auto reclose relays. Pleaserefer to Service Manual R8505 (cells 0A01 – Scheme Fn Links 1, & 0A02 –Scheme Fn Links 2), for general information. Logic functions in KVTR100application software are:

8.1 Menu Cell 0A01 – Scheme Fn Links 1

Bit No. Display Effect in scheme logic

0 CBAUX = 52A 0 = INP CB AuxSwitch OFF = CB closed(52b contact)1 = INP CB AuxSwitch ON = CB closed(52a contact)

1 IN3 ON = SPRCHG 0 = INP Spring Charg OFF = springcharged1 = INP Spring Charg ON = spring charged

2 IN4 ON = SYN OK 0 = Safe toclose OFF = system OK to close1 = INP Safe toClose ON = system OK toclose

3 IN6 ON = LCKOUT 0 = INP Block AR OFF = drive to lockout1 = INP Block AR ON = drive to lockout

4 INI CB TR 0 = protn op required to start A/R1 = A/R start by CB trip (no ref to protn), fortesting

5 INI CB OPN 0 = A/R init only if CB is initially closed1 = A/R init by prot op with CB open orclosed (for testing)

6 CLD P/U 0 = cold load pickup logic disabled1 = cold load pickup logic enabled

7 MC AR INH 0 = A/R init enable immediately after CBmanual close1 = A/R init inhibit for TMR Mancl AR Inhafter manual close

8 TIM RES LCK 0 = disable unconditional timed auto-resetfrom lockout1 = enable unconditional timed auto-resetfrom lockout

9 AUTO RES LCK 0 = disable manual close timed auto-resetfrom lockout1 = enable manual close timed auto-resetfrom lockout

Bit No. Display Effect in scheme logic

A EX FLT FRQ 0 = disable excessive fault frequency logic1 = enable excessive fault frequency logic

B M LCK 0 = disable maintenance lockout logic1 = enable maintenance lockout logic

C M LCK IMM 0 = maint lockout at end of A/R cycle after targetis reached1 = maint lockout immediate when target isreached

D FULL CL PLS 0 = CB close output cut off when CB closes1 = CB close output held for set “TMR ClosePulse" time

E RC TIM RUN ON 0 = reclaim time suspended if inst protectionoperates1 = reclaim time continues if inst protectionoperates

F STDT CB TR0 0 = dead time start when CB tripped andprotection reset1 = dead time start when CB trips, regardless ofprotection

8.2 Menu Cell OAO2 – Scheme Fn Links 2:

Bit no. Display Effect in scheme logic

0 HSAR NO SC 0 = all reclosures require “system OK to close” signal1 = 1st shot only (after D Time 1) without systemcheck (subsequent shots require “system OK toclose”)

1 NO SET IN SERV 0 = settings can be changed with scheme in or outof service1 = settings can be changed only with scheme out ofservice

2 IN13 = LINELIVE 0 = INP LineVolt Mon OFF = line live1 = INP LineVolt Mon ON = line live

3 LL TO INIT 0 = A/R initiation by prot op only if line wasinitially live or dead1 = A/R initiation by prot op only if line was initiallylive

4 DL TO TIME 0 = dead time starts without reference to line volts1 = dead time starts only when line is dead

5 DLC AR INH 0 = A/R initiation enabled immediatelyafter line energisation1 = A/R init inhibit for TMR Mancl ARInh after line energisation

Section 9. TIMER SETTING RANGES

Please refer to Service Manual R8505 for general details. The timers used in theKVTR100 scheme are:

Display name Description Setting limitsMin Max

TMR Dead Time 1 1st shot dead time 0.01s 300s

TMR Dead Time 2 2nd shot dead time 1.00s 300s

TMR Dead Time 3 3rd shot dead time 1.00s 9999s

TMR Dead Time 4 4th shot dead time 1.00s 9999s

TMR Close Pulse Maximum duration of 0.01s 10sCB close signal

TMR Reclaim Time Reclaim time 1.00s 9999s

TMR SynCh Window Maximum waiting time 0.01s 600sfor “safe to close” signalat end of dead time.Lockout if not received.

TMR SprCh Window Maximum waiting time 0.01s 600s“spring charged” signal atend of dead time. Lockout ifnot received

TMR Mancl AR Inh Auto reclose initiation inhibit 0.01s 300speriod following CB manualclose

TMR TripfailTime Maximum waiting time for CB 0.01s 300strip + protection reset followingA/R initiation by protectionoperation

TMR Exc Flt Frq Fault trip counting period for 1.00s 9999sexcess flt freq logic

TMR Autoreset Setting for time delayed 1.00s 9999sauto-reset from lockout

TMR C Ld Pickup Cold load pickup time 1.00s 9999s

TMR Linev mory Line volt memory timer 0.01s 100s

Section 10. COUNTERS

Please refer to Service Manual R8505

10.1 Counter registers (coils/resets)

KVTR100 logic includes four counters, as detailed below.

Display name Description

Volatile: RST Sequence Cnt A/R initiations counter, for sequencecontrol

RST ExFltFrq Cnt Fault trips counter for Excessive FaultFrequency logic

Non-volatile: RST Maint Countr Fault trips counter for maintenancealarm and lockout

RST Total Reclos Total reclose attempts counter

10.2 Counter settings (targets)

KVTR100 includes counter settings as detailed below.

Display name Description Setting limitsMin Max

CNS Shots Maximum auto reclose attempts beforelockout 1s 4s

CNS Inst Trips Permitted number of instantaneous trips 0s 5s

CNS MaintAlarm Number of fault trips to maintenancelockout 1s 9999s

CNS MaintLockout Number of fault trips to maintenancelockout 1s 9999s

CNS Exc Flt Freq Fault trips target for Excessive Fault Freqlogic 1s 9999s

CNS SEF Shots Max A/R attempts for Sensitive EFinitiation 0s 4s

CNS SEF InsTrips Permitted number of instantaneousSEF tips 0s 5s

10.3 Counter values (messages)

Counter messages in the KVTR100 are given below.

Display name Description

CNV Total Reclos Total reclose attempts (RST Total Reclos – 0)

CNV ShotstoM.Lck Fault trips remaining before maintenance lockout.(CNS MaintLockout – RST Maint Countr)

Section 11. SCHEME ALARMS

Scheme alarms provided by the KVTR100 are described below.

Status 1 alarms – red LED continuous:

Auto reclose in progress, from initiation to reset or lockout.

Status 2 alarms – amber LED continuous:

Scheme lockout.

Inititation inhibit (operates during time TMR Mancl AR Inh, aftermanual CB close).

Scheme switched out of service.

Compound alarms – red LED flashing:

Fault not cleared (CB failed to trip, or protection failed to reset,after A/R initiation by protection operation).

Maintenance lockout.

Excessive fault frequency lockout.

CB failed to close.

Section 12. EVENT RECORDS

Please refer to Service Manual R8505, sections 2.6.1, 5.1.4 and 6.9, for anoverview. Event records in the KVTR100 are described below.

Records available over communications link:

Message Associated data

SEQUENCE START Time tag and counter RST Total Reclose valueTOTAL RECLOSURES at start of last auto reclose cycle

SEQUENCE END Time tag and counter RST Total RecloseTOTAL RECLOSURES value at end of last auto reclose cycle

EVR SeqTm: Shots Total cycle time and number of reclose attemptes in lastt : n auto reclose cycle

continued overleaf

REPAIR FORM

Please complete this form and return it to ALSTOM T&D Protection & Control Limited withthe equipment to be repaired. This form may also be used in the case of applicationqueries.

ALSTOM T&D Protection & Control LimitedSt. Leonards WorksStaffordST17 4LX,England

For: After Sales Service Department

Customer Ref: _____________________ Model No: __________________

GECA Contract Ref: _____________________ Serial No: __________________

Date: _____________________

1. What parameters were in use at the time the fault occurred?

AC volts _____________ Main VT/Test set

DC volts _____________ Battery/Power supply

AC current _____________ Main CT/Test set

Frequency _____________

2. Which type of test was being used? ____________________________________________

3. Were all the external components fitted where required? Yes/No(Delete as appropriate.)

4. List the relay settings being used

____________________________________________________________________________

____________________________________________________________________________

____________________________________________________________________________

5. What did you expect to happen?

____________________________________________________________________________

____________________________________________________________________________

____________________________________________________________________________

____________________________________________________________________________

6. What did happen?

____________________________________________________________________________

____________________________________________________________________________

____________________________________________________________________________

____________________________________________________________________________

7. When did the fault occur?

Instant Yes/No Intermittent Yes/No

Time delayed Yes/No (Delete as appropriate).

By how long? ___________

8. What indications if any did the relay show?

____________________________________________________________________________

____________________________________________________________________________

____________________________________________________________________________

9. Was there any visual damage?

____________________________________________________________________________

____________________________________________________________________________

____________________________________________________________________________

10. Any other remarks which may be useful:

____________________________________________________________________________

____________________________________________________________________________

____________________________________________________________________________

______________________________________ _______________________________________Signature Title

______________________________________ _______________________________________Name (in capitals) Company name

A L S T O M T & D P r o t e c t i o n & C o n t r o l L t d St Leonards Works, Stafford, ST17 4LX EnglandTel: 44 (0) 1785 223251 Fax: 44 (0) 1785 212232 Email: [email protected] Internet: www.alstom.com

©1999 ALSTOM T&D Protection & Control Ltd

Our policy is one of continuous product development and the right is reserved to supply equipment which may vary from that described.

Publication R 6522D Printed in England.

R6522D KVTR

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