MiCOM P125!6!7 Relays

8/13/2019 MiCOM P125!6!7 Relays

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MiCOM P125 rangeDirectional /non Directional relays

Introduction The MiCOM Directional /non-Directional Relays provideflexible and reliable integration

of protection, control,monitoring and measurementfunctions.Extensive functionality is able toprovide complete protection andcontrol for a wide range of overhead lines and undergroundcables from distribution totransmission voltage levels,capacitors bank, generators andtransformers generator schemes.

Protection• Directional/non Directional

phase overcurrent

• Directional/non Directionalearth fault

• Wattmetric earth fault

• Three phase Overcurrent

• Under current

• Negative phase overcurrent

• Cold load pick up

• Thermal Overload• Under voltage

• Over voltage

• Residual Over voltage

• Broken Conductor

• Circuit breaker failure

Control• Multi shot autoreclose

• Blocking logic

• Circuit breaker control

• Selective relay scheme logic• Start contact

• Programmable AND logic

• One/Two setting groups

• Programmable relay outputs

• Programmable optically

isolated inputsMeasurement

• Comprehensive measurementvalues

• Instantaneous

• Integrated

Post fault analysis• Event and fault records

• Disturbance records

Monitoring

• Breaker state monitoring• Breaker condition monitoring

• Trip circuit SupervisionCommunications

• A choice of protocols

• Front and rear communicationports

Diagnostic

• Power-up diagnostic

• Continuous self monitoring

• Test facilitiesUser friendly interface

• Liquid crystal display withback light

• Programmable LEDindications

• Password protection

Software support

• MiCOM S1 software forsetting, measurements, faults,alarms, events, disturbance

records, monitoring and faultanalysis.

P125

P126

P127

DIRECTIONAL/NON DIRECTIONALEARTH FAULT RELAY

THREE PHASE OVERCURRENT ANDDIRECTIONAL/NON DIRECTIONAL

EARTH FAULT RELAY

DIRECTIONAL/NON DIRECTIONALOVERCURRENT AND DIRECTIONAL/NON

DIRECTIONAL EARTH FAULT RELAY

8/13/2019 MiCOM P125!6!7 Relays


FUNCTIONS ANSI CODEMiCOM

P125

MiCOM

P126

MiCOM

P127

Directional/non Directional earth fault 67N/50N/51N X X X

Directional/non directional phase overcurrent 67/50/51 X Three phase overcurrent 50/51 X

Wattmetric protection 32N X X X

Broken conductor detection X X

Undercurrent 37 X X

Negative phase sequence overcurrent 46 X X

Thermal overload 49 X X

Undervoltage 27 X

Overvoltage 59 X

Residual overvoltage 59N X X X

Auto-reclose (4 shots) 79 X XCircuit breaker failure 50BF X X

Circuit breaker monitoring and control X X

Trip Circuit Supervision [TCS] X X

Blocking logic X X X

Cold load Pick up X X

Output relay latching 86 X X X

Selective relay scheme logic X X

Start contact X X X

Programmable AND logic X X

Setting group 1 2 2Measurements X X X

Fault records X X

Event records X X

Disturbance records X X

Test facilities X X X

Diagnostic/self monitoring X X X

Network Communication X X X

RS232 front port X X X

Support software (MiCOM S1) X X X

MODELS AVAILABLE AND FUNCTIONALITIES

8/13/2019 MiCOM P125!6!7 Relays


Application The MiCOM P125 series issuitable for all applicationswhere directional overcurrentand directional earth faultprotection is required. The integration of manyfunctions provides completeprotection for a wide range of overhead lines andunderground cables, fromdistribution to transmissionvoltage levels. It is suitable forsolid earthed, resistanceearthed. Inductance earthed(Petersen coil) isolated system.A comprehensive suite of

overcurrent protection providesan economic solution tocomplex applications. The fig.1a shows the insertion of P126 for a general distributionunderground line. The fig. 1b shows the P127applied to parallel feeders. The MiCOM P125 range relaysare also applicable in generatorand in generator transformers

schemes.A range of communicationprotocols allows connection withmany external devices thusproviding remote programmingcontrol and extraction of information.

P12750 46 27

51 37 BC

67 59 50BF67N 59N 50N/51N

Load

P126

50N 46 4951N 37 50BF

67N 50 BC

59N 51 79

Underground cable applicationFig. 1a:

Feeder applicationFig. 1a:

8/13/2019 MiCOM P125!6!7 Relays


8/13/2019 MiCOM P125!6!7 Relays


available. Each stage can beconfigured in AND / OR logicmode.

Overvoltage Two independent stages withdefinite time elements are

available. Each stage can beconfigured in AND / OR logicmode.

Residual OvervoltageResidual over-voltageprotection is available fordetecting earth faults in highimpedance earthed or insultedsystem. The neutral voltagecan be measured directlyusing a VT transformer or

derived in according to theinsertion mode of the phasevoltage.An independent stage withdefinite time element isavailable.It is named as 4th stage.

Blocking logicWhen MiCOM P125 relays areused in critical networks,management of protections

must take care of surroundingdevices.2 blocking logic inputs can beconfigured independently fromeach other to block anycombination of the selectedelements (e.g. currentelements, thermal overloadetc.)Each blocking signal freezes itsassociated memory (timer orthermal state) after drop off, itrestart from the pre-blockingvalue and status if conditionsare still present.

Selective relay schemelogicP125 range relay includesselective relay scheme logic.A dedicated digital input cantemporarily alter the timedelay settings in response to adownstream relay phase/earth

fault start condition. This function allows theMiCOM relays to discriminate

correctly when used in acascade scheme. The selective relay scheme logicfunction can be enabled ordisabled by the user asrequired.

Cold load pick upCold load pick-up temporarilyraises the phase overcurrent,earth overcurrent, thermalstatus, negative sequenceovercurrent settings followingclosure of the circuit breaker,allowing the protection settingsto be set closer to the loadprofile.

Setting groupsExternal conditions may requestthe need of different settings.MiCOM P126 and P127 relaysprovide two setting groupsincluding all the protection,automation features andmonitoring functions. The switching between group 1and group 2 can be achievedlocally, remotely, via adedicated logic input.All settings are stored in

E2PROM (non-volatile rewritingmemory)

Programmable inputs

and outputsMiCOM P125 range include upto 7 logic inputs and 9 logicoutputs including watch dog.For P125 range two of outputrelays are change over type.Change over output type istypically used for tripping

commands.

Protection and control elementscan easily be assigned to anyoutput.All inputs and outputs are freelyconfigurable.

Latching of the outputs

relayAny of the output relays can belatched, excluded the tripcommand relay (relay n.1). The associated functions to tripcommand relay can be latched.Reset of all outputs and tripcommands is possible by logicinput, a push button on front HMIor through the local areanetwork.

Circuit breaker failureprotectionCircuit breaker failure protectionmay be used for trippingupstream circuit breakers andalso the local secondary trip coilwhen a local breaker failure isdetected.

AutorecloseIt provides three pole multi-shotautoreclose, setting change

during dead and reclaim timewhether enable and virtualreclose when two CBs in seriesMV distribution system using fuseare present. The user may select whichprotection elements and/or adigital input may start any of fourshots independently.Each shot has independentlysettable dead and reclaim time. A

counter stores the number of reclose commands incrementedwith each reclose order.

Monitoring andmeasurementCircuit-Breaker monitoringPreventive circuit-breakermaintenance is the advancefunction provided by the MiCOMP126 and P127 with adjustableclosing and opening timemeasurements and breakerfailure protection.

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All phase currents I and I2

during faults are memorisedand summed.Trip Circuit Supervision[TCS]MiCOM P126 and P127 relays

allow trip circuit supervisionvia a specific input. Result of this monitoring can be locallyor remotely transmitted.MeasurementsMiCOM P125 relays monitorpermanently all of theanalogue inputs (voltage andcurrents) display the values onthe LCD and store in memorythe measurements.

The measured values are thetrue RMS up to the 10th

harmonic with a 0.1%accuracy (nominal conditions).Peak demands with a 15minute window are alsomemorised.All measured and calculatedvalues can be displayed on theHMI or transferred locally orremotely upon user request.

Event records75 logic events restored inMiCOM P126 and P127relays.Events include inputs/outputs,change of status, alarms andcontact operations.All events are time stamped to1ms.Disturbance recordsVoltage and currentwaveforms are captured byMiCOM P126 and P127 relaysat 1600Hz.Up to 3 seconds of records arestored inside MiCOM relays.Disturbance recording functionis triggered either by any of the programmed threshold orby an external input throughthe local area network.Fault records5 faults are stored inside the

MiCOM relays.Each fault includes:

• Record number

• Fault time• Fault date• Active setting group

• Faulted Phase

• Protection operation• MagnitudeFault indicator help the user toidentify clearly the fault and tomonitor the MiCOM P126 andP127 relay settings.

User interfaceFront display and menusAll functions includingprotection, automation,communication, LEDs, inputs

and outputs can beprogrammed and modifiedusing the front panel userinterface. The 32 alphanumeric backlit LCdisplay (available in a range of

languages) provides the user

with key information (faults,measurements, settings etc)

The menus have a pull-downstructure for easy use and quickaccess to any data.Dedicated Leeds

4 Leeds indicate the status of theMiCOM relays (trip order,alarms, power on, watch dog)Acknowledge of alarm and tripLEDs can be easily performedlocally or remotely.Programmable LEDs4 freely programmable LEDs areprovided on all models of theMiCOM P125 range. The user can assign

independently to each LED anyprogram function or combinationof thresholds.KeypadA seven button tactile keypad onthe front panel allows the usereasy access to any data in theMiCOM P125 range relays.

Local and Remote

Communication Two communication ports are

available; a rear port providingremote communication and afront port providing localcommunication.Remote communication The remote communications arebased on RS485 voltage levels. This port is available forMODBUS, Courier, IEC 60870-5-103 and DNP3 protocols.MiCOM relays can transmit to thelocal monitoring system (e.g.

MiCOM S10) or remotely to theSCADA settings, measurements,

8/13/2019 MiCOM P125!6!7 Relays


alarms, fault events, anddisturbance records. The communicationparameters (relay address,data rate, parity, etc.) can beprogrammed using the HMI

front port.Local communications The front serialcommunications port has beendesigned for use with MiCOMS1, which fully supportsfunctions within the relay byproviding the ability toprogramme the setting off-line, extract and view event,disturbance and perform

control functions.

The interface MiCOM S1software interface will be fullWindows TM last versioncompatible.

DiagnosticAutomatic tests performed

including power-on diagnosticand continuous self-monitoringensure a high degree of reliability.

HardwareMiCOM P125, P126 and P127models are digital protectionsand control relays.CaseFor all models of MiCOM P125range (P125, P126, P127) the

unit has a drawout metal 4Ucase.

The width is:P125 -> 20TEP126 and P127-> 30TEAll CTs inputs are short-circuitedif the active unit is withdrawnfrom the case.

All MiCOM relays can be inpanel or rack mounted.WiringExternal connections are madevia MIDOS type terminal blocks.Each connection includes2x6.35mm Faston and one M4screw fixing. The wiring for all the MiCOMP125 range is standard toprovide maximum compatibility.

A B C

1A

55

56 32N 50N 51N

67N 59N

WD

RL1

35

37

364

6

210

12

8

RL3

RL4

RL6

RL5

14

16

18

20

3

1

7

5

22

2426

28

17

19

21

23

~/+ 33

Auxi iary Vo tage

~/- 34

MiCOMP125

25A

26A

5A

47

29

30

Case earth

connection

Termina

RS48531

32

RS485

Communication Port

+

Watch Dog

Programmable output

Programmable input L1




Programmable tripping output

Programmable output

Programmable output

Programmable output

Programmable output

A

BCP ase rotation

8/13/2019 MiCOM P125!6!7 Relays


25A

26A

49

51

50

A B C

1A

1A

1A

1A

5A

5A

5A

5A

52

53

54

55

56

41

42

44

45

46

47

48

21A

WD

RL1

RL2

RL3

RL4

RL6

RL5

RL7

RL8

3736

6

2

10

12

814

16

18

3

1

7

6

11

13

15

22

24

26

17

19

21

25

4A

2A

3A

1A

~/+ 33

Auxiliary Voltage~ - 34

29

30

Case earth

connection

Termina

RS485

31

32

RS485Communication

+

MiCOM

P126

A

BCP ase rotation

50 51 32N

50N 51N67N

37 46 49

79 BC

50BF

59N

TCS

Watch Dog

Programmable tripping output

Programmable output

Programmable output

Programmable output

Programmable output

Programmable output

Programmable output

Programmable output








8/13/2019 MiCOM P125!6!7 Relays


Two phases-neutral plus Delta Earthconnection

T

wo

phase

to

ph

onnection

Two phase to phase plusDelta Earth connection

Internal reconstruction voltage UC

A B C A B C21A

22A

Internal reconstruction voltage UCA

23A

24A

25A

26A

21A

22A

24A

25A

26A

49

51

50

Internal reconstruction volta e Ue

A B C

1A

1A

1A

1A

5A

5A

5A

5A

52

53

54

56

41

43

42

44

45

46

47

48

21A

22A

24A

25A

26A

50 51 67

32N 50N 51N

67N 37 46

49 79 BC

50BF

59 59N 27

WD

RL1

RL2

RL3

RL4

RL6

RL7

RL8

35

37

4

6

10

12

814

16

18

20

3

1

7

6

9

11

13

15

22

24

26

28

17

19

21

23

27

25

4A

2A

3A

1A

~/+ 33

Auxiliary Voltage~ - 34

29

30

Case eartconnection

Terminal

RS48531

32

RS485+

MiCOM

P127

TCS

A

BCPhase rotation

Watch Dog

Programma e tripping

Programmable output

Programmable output

Programmable output

Programmable output

Programmable output

Programmable output

Programmable output








8/13/2019 MiCOM P125!6!7 Relays


Technical specificationsInputsAC phase current 1 and 5 AmpAC earth current 1 and 5 AmpAC phase and residual voltage

from 57 to 130V

from 220 to 480VFrequency 50/60HzAuxiliary Voltage Vaux 24 - 60V

48-150V110-250Vdc/110-250Vac

BurdensAC current Phase<0.025VA (1A)

<0.3VA (5A)Earth<0.008VA at 0.1Ie (1A)

<0.01VA at 0.1Ie (5A)DC auxiliary voltage 3W standby+0.25 per

energised relayOptical isolated input 10mA per inputThermal withstandAC current inputs 1s @ 100 x rated current

2s @ 40 x rated currentcontinuous @ 4 x rated current

AccuracyProtection thresholds +/-2% Time delay +/-2% with a minimum of 10 msMeasurements typical +/-0.2% at In

typical +/ -0.2% at UnCT requirementPhase inputs Typical 5VA 5P10Earth inputs Core balanced CT or residual

connection to phase CTsHMIDisplay : 2 x 16 alphanumeric characters

back-lit LCDled : 8 including 4 programmablekeyboard : 7 sensitive keypadSerial port: RS232 for setting softwareDirectional/Non-Directional phaseOvercurrent settings:

current from 0.1to 40 In,Max Torque Angle from 0°to 359°, Trip zone from 10° to 175°.IDMT Curves / DT.Directional/Non-Directional earth faultsettings:current from 0.002 to 40 Ien,voltage from 0.01 to 0.5 Uen,

Max Torque Angle 0 to 359°, Trip zone: 10 to 175°.IDMT Curves / DT.

Directional/non Directional overcurrentand Directional/non Directional earthfault time settingDMT:Phase time (I>, I>>, I>>>) 0 ms to 600sEarth time (Ie>, Ie>>, Ie>>>) 0 ms to 600s

IDMT curves:IEC type: Short time inverse (IEC)

Standard inverse (IEC)Very inverse (IEC)Extremely inverse (IEC)Long time inverse (IEC)

IEEE/ANSI type: Short time inverse (CO2)Moderately inverse (ANSI)Inverse (CO8)Very inverse (ANSI)

Extremely inverse (ANSI)Rectifier Protection type RECTElectromechanical type RI

Time multiplier setting (TMS)0.025 to 1.5 step 0.025

Reset time:IDMT curves: Short time inverse (CO2)

Moderately inverse (ANSI)Inverse (CO8)Very inverse (ANSI)Extremely inverse (ANSI)

DMT: 0 to 60s step size 0.01s

Earth fault Wattmetric thresholds:from 0.001 to 1.5 Pen,

Max Torque angle from 0°to 359° Trip zonefrom 10° to 170°.Delay time 0 to 600s.

Under current thresholdsfrom 5 to 100% of In

Negative sequence current thresholds:from 0.1 to 40 x In

IDMT curve identical to phase overcurrent;DT: from 0 to 600s.Broken Conductor:Ratio I2/I1 from 20 to 100%DT from 0 to 15000s step size 1sThermal replica thresholds: Threshold from 0.08 to 3.2 In,

θ from 50 to 200%, Thermal constant from 1 to 200 min, delaytime 0 to 600s.Under voltage thresholds:

from 0.05 to 1 UnDelay time 0 to 150s

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Over voltage thresholds:from 0.05 to 1.5 UnDelay time 0 to 150sZero Sequence Voltage thresholds:from 0.01to 1 UenDelay time from 0 to 150s

Cold load Pick Upform 100% to 500% delay time 0 to 3600sAuto reclose (79)4 shots: dead and reclaim time from 0 to 600sCircuit breaker control (50BF)t_BF1, t_BF2 from 0.1 to 10sCircuit Breaker control Trip time from 0.1 to 5s. step size 0.1sClosing time from 0.1 to 5s step size 0.1sContactsRating Make: 30 Amps and carry for 0.2s

Carry: 5 Amps continuousBreak: 135 Vdc, 0.3(L/R=30ms)

220 Vac, 5A (cos ϕ =0.6)

Mechanical durability >100000 operationsHousingCase :

4U (177mm) HMiCOM P125 20 TEMiCOM P126 30 TE

MiCOM P127 30 TEWeight:P125 c. 2KgP126 c. 3KgP127 c. 3.5KgMounting:Rack or flush mountingConnectionsRear, full draw-out with automatic CT shortingProtection: IEC 529; IP 52, IK 07(double faston + M4 screw per connection)

High voltage withstandDielectric withstand (50/60Hz) IEC 60255-5 2 kV in common mode

1 kV in differential modeImpulse voltage IEC 60255-5 5 kV in common mode

1 kV in differential mode

Insulation resistance IEC 60255-5 > 1000 MΩElectrical environmentHigh frequency disturbance IEC 61000-4-1 2.5 kV in common mode, class 3

1 kV in differential mode, class 3Fast transient disturbance IEC 61000-4-4 4 kV auxiliary supply, class 4

ANSI C37.90.1 2 kV other, class 4Electrostatic discharge IEC 61000-4-2 8 kV, class 4Radio frequency impulse ANSI C37.90.2 35 V/m

IEC 61000-4-3 10 V/mEnvironmental withstand Temperature IEC 60255-6 Storing and transportation

-25°C to +70°COperation -10°C to + 55°C

Humidity IEC 60068-2-3 56 days at 93% RH and 40°C

Enclosure protection IEC 60529 IP 52, IK 07Vibration IEC 60255-21-1 Response and endurance, class 2Shock and bump IEC 60255-21-11 Response and withstand, class 1Seismic IEC 60255-21-3 Class 1

Product safety

72/73/EEC

Compliance with European Commission Low Voltage Directive.Compliance is demonstrated by reference to generic safety standards:

EN61010-1 : 1993/A2: 1995

EN60950 : 1992/A11: 1997

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MiCOM P125 rangeoutline descriptionDirectional / non DirectionalPhase OvercurrentDirectional / non Directional

earth fault overcurrent relayin drawout 4U metal case. The following functions mustbe available :

• 3 independent phasethresholds(instantaneousand delayed) 67/50/51

• 3 independent earththresholds (instantaneousand delayed)67N/50N/51N

• Tripping curves type IEC(short time inverse,standard inverse, veryinverse, extremely inverse,long time inverse) andIEEE/ANSI (short timeinverse, moderatelyinverse, inverse, veryinverse, extremely inverse)

• Negative phase sequenceovercurrent - 46

• Undercurrent - 37

• Thermal overload – 49

• Phase Overvoltage – 59• Phase Undervoltage – 27

• Residual Overvoltage59N

• Output relay latching - 86

• Broken conductordetection

• 4 shot auto-recloser - 79

• Circuit breaker failuredetection 50 BF

• Circuit breakermonitoring

• Trip circuit supervision

The relay must providedcomplete measurements andrecording functions including

• True RMS values

• Event recorder with thelast 75 events, 1ms timestamped.

• Fault recorder with thelast 5 faults

• Disturbance recorder withstorage of 5 records for 3seconds each

User interface shall include

• A 32 characters backlitdisplay

• Programmable LEDs

• A front panel RS232 forlocal settings

• A RS485 rear portcompatible withMODBUS, Courier orIEC60870-5-103, DNP3

• An easy to use PC settingsoftware

ORDERING CODE

MECHANICALDRAWING

X X

P 1 2 5P 1 2 6P 1 2 7

0,1-40 Ion A0,01-8 Ion B

0,002-1 Ion C

57-130V A

220-480V B

A

FM

123

4

French 0

English/American 1Spanish 2

German 3Italian 4

Russian 5

Polish 6Portuguese 7

Dutch 8Czech A

Ordering Code

MiCOMMiCOMMiCOM

Earth current input

Voltage input

Auxiliary supply voltage24-60Vdc

48-150Vdc110-250Vac

Communication protocol

HMI Language

MODBUSK-BUS/COURIER

IEC 60870-5-103/VDEW

DNP3

Documents

MiCOM P125!6!7 Relays