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P124Self & Dual PoweredOvercurrent Relays

P124S SOFTWARE VERSION V6.D

P124D SOFTWARE VERSION V6.E

Technical Data SheetP124/EN TDS/A11

This Document does not replace the Technical Manual

P124 Technical Data Sheet 2


APPLICATION AND SCOPEMiCOM P124 are numerical relays designed to offer completeovercurrent protection without requiring any external auxiliarysupply.

They can be applied to a wide variety of high and mediumvoltage electrical systems. Available in a self-powered or in adual-powered version, they offer three phase and earth faultprotection.

When supervision functions are required, the dual-poweredversion offers additional measurement, monitoring andrecording functions.

Numerous integrated communication protocols are availablefor flexible integration in most substation control or SCADAsystems.The user-friendly operator interface allows easy reading ofmeasured values and simple configuration of the relay.Associated accessories (low energy striker, battery box orcapacitor trip unit) are also available to fit your particularapplication.Housed in a 4U metal case, it can be easily mounted in apanel or in a rack.

APPLICATION

MiCOM P124 overcurrent protection relays provide a completeand fully safe protection for applications where no externalauxiliary power supply is available or guaranteed.

They provide efficient protection for industrial plants, utilities’distribution substations or customers and can be used aseither main or backup protection.

The following two models are available:> SELF-POWERED P124> DUAL-POWERED P124

Self-powered P124 model offers a simple and cost efficientsolution when no external auxiliary power supply is available.

In addition to its protection functions and when powered by anexternal auxiliary source, dual-powered P124 offers the abilityto transmit recorded and measured data to a supervisor viacommunication networks. Should the auxiliary power supplyfail, protection and tripping functions remain fully operational.

These two types of MiCOM P124 relays take the powernecessary for their operation from line current transformers.

The functions offered by these two models are listed in thenext page.

MAIN FEATURES

Both models offer a wide range of overcurrent protectionfunctions without requiring an external auxiliary supply: threeindependent phase stages, three independent earth stages,twelve groups of IDMT curves for the phase and 14 for theearth, and two thermal overload stages.

The dual-powered model offers additional protection,automation and monitoring. Some of these additional functionsare operational only when an auxiliary power supply isavailable. In the event of loss of this power supply, theperformances of the P124 dual-powered relay becomeequivalent to the ones of the self powered model.

The power supply to the electronic circuits of the MiCOM P124has been optimised so that it can trigger the circuit-breakerwith a load current of 0.2 In on at least one phase.

The hardware architecture and software algorithms have beenstudied to operate on very short failure detection times, sothat, starting from a load current of 0.2 In, tripping occurswithin no more than 30 ms.

MiCOM P124 relays are equipped with two types of circuit-breaker trip outputs, fully independent from an externalauxiliary power supply:> A capacitance discharge output capable of putting out

sufficient power to a striker releasing the actuatingmechanism of the circuit-breaker,

> A changeover contact relay output capable of sending anorder directly to the circuit-breaker coil.

The front panel includes an electromagnetic bistable flag toindicate that a trip has occured. As an option in the dual-powered model, four additional magnetic indicator flags arefreely configurable. Depending on the model, one or severalLEDs indicate the correct operation of the relay as well asother information regarding protection of the electrical system.

MiCOM P124 relays are housed in a 4U-30 TE shallow metalcase for mounting either in a rack or in a panel.

PROTECTION AND CONTROL

Time-delayed phase overcurrent (51)MiCOM P124 relays provide three phase current inputs. Threeindependent stages are available.

For the first stage, the user can select between 12 differenttypes of curves (IEEE/ANSI, IEC, RI, RC).

For each curve model a selection of 60 different TMS valuesare available to optimise fault detection and shorten trippingtime in co-ordination with fuses, motors, feeders, transformersand other devices.

The second and third stages have independent settings withadjustable definite time tripping.

Time delays can be set from 0 to 180s thus providingmaximum selectivity.

The phase current can be set from 0.1 to 40 times the ratedphase current (first threshold limited at 4In).

Instantaneous phase overcurrent (50)

For each phase overcurrent stage, the instantaneousinformation is generated within 30 ms after the threshold hasbeen exceeded, with a load current of 0.2In on at least onephase. This instantaneous information is generated within 60ms of the circuit breaker opening (close-on-to-fault case).

For the dual-powered model, the user can assign eachinstantaneous information to output contacts, as well as to fourLEDs and four magnetic indicator flags located on the frontpanel.


Fig1: Overcurrent thresholds

Time-delayed earth fault (51N)

Earth fault detection is identical to the detection of time-delayed phase overcurrent. Three independent earth faultstages can be selected. For the first stage, the user can selecteither any of the14 families of curves and TMS values or adefinite time setting. Earth current range can be set from 0.002to 40 times the rated earth current to allow maximumsensitivity for earth fault detection. Earth current is generatedeither by a CT core of sufficient power, or by a residualconnection of the three line CTs.

Instantaneous earth fault (50N)

As for phase faults, MiCOM P124 relays generateinstantaneous data for each earth fault stage, with the samecharacteristics. For the dual-powered model, the user canassign instantaneous earth fault stages to output contacts, aswell as to four LEDs and four magnetic indicator flags locatedon the front panel.

Thermal overload (49)

Transformers and cables must be protected taking intoaccount their particular thermal characteristics. MiCOM P124relays include a thermal overload element based on true RMSvalue of the current. Alarm and overload thresholds as well asthermal time constants are fully programmable to match eachdevice requirement.

Undercurrent (37)

MiCOM P124 dual-powered relays provide undercurrentprotection. This function is particularly useful to detect a loss ofload or a circuit breaker failure.

Negative sequence overcurrent (46)

In order to maximise the time of operation of electricalsystems, dual-powered MiCOM P124 relays provide anegative sequence overcurrent protection function. Thisprogrammable function is particularly well adapted to detectany phase unbalance conditions. Instantaneous and time-delayed (DT or IDMT) negative sequence overcurrent stagesare the same stages as the phase overcurrent.

37

F ront por t R ear por tR E COR DING

FE AT U R E S

AU XIL IAR Y FU NCT IONS

- Aux i l iary timers

- P eak and rol l ing demand

- CB Monitor ing

- Cold Load P ick U p

- T r ip Ci rcui t Supervis ion

- Block ing Logic

- Selective Scheme Logic

- Sel f Monitor ing

- P hase Cur rent

- Residual cur rent

- Frequency

- Autoreclos e counters

- Di rect and inverse

cur rents

- CB mechanical operation

counter

- CB electr ical operation

counter

50/5150N

49 46

79 85

50B F51N

46B C

Fault r ecord

5

E vent R ecording

75

Dis t. R ecording

3 S ec

S etting

s oftware S 1R S 485 por t

To setting software S 1

to SCADA sys tem

ME AS U R E ME NT S

A lways Avai lable Available on the DualPowered model Only

P 124: S el f and Dual Powered

Overcur r ent Relays


Broken Conductor

A typical unbalanced fault that can occur on the system is anopen circuit fault. This fault can arise from broken conductor,mis-operation of one of the switchgear poles, or blowing of afuse. MiCOM P124 relays incorporate an element, whichmeasures the ratio of negative to positive sequence current(I2/I1). This fully programmable function allows more sensitivityand stability than pure negative measurement.

Blocking logic

When relays are used in critical networks, management ofprotection relays must take surrounding devices intoconsideration. In MiCOM P124 dual-powered relays, twoblocking logic inputs can be configured independently of eachother to lock any selected element (current thresholds, thermalreplica, etc.). This function is deactivated in the event of a lossof auxiliary power supply.

Selective relay scheme logic

Dual-powered MiCOM P124 relays include selective relayscheme logic. A dedicated digital input can temporarily alterthe time delay settings in response to the phase/earth faultstart condition of a downstream relay.

This function allows the relay to clear the fault faster whenused in a cascade scheme. It is an alternative for personnelmore familiar with this type of selectivity than with blockinglogic.

Cold load pickup

The cold load pickup feature allows selected settings to beraised to react to temporary overload conditions that mayoccur during cold starts. This function is deactivated in theevent of loss of auxiliary power.

Setting groups

External conditions may impose the need of different settings.Dual-powered MiCOM P124 relays provide two setting groups.Switching between setting groups can be done via theactivation of a logic input, through the front panel interface, orthrough remote communication.

Inputs and Outputs Dual-powered

MiCOM P124 relays have seven output relays with unbiasedchangeover contacts and five opto-isolated logic inputs. Eachinput can be configured for the blocking logic, selective logic,etc. and each output can be assigned to trip on thresholdscrossing and to light up a LED on the front panel.

Tripping outputs

MiCOM P124 relays have two types of tripping outputs that areentirely independent from any auxiliary supply: > A capacitance discharge output capable of supplying a

striker with an energy of 20mJ at 12 volts. > Another changeover contact relay output with a high

breaking capacity to trip the circuit-breaker coil.

FUNCTION ANSICODES

SELF-POWEREDP124S

DUAL-POWEREDP124D

Three-phase non directional overcurrent 3 independent thresholds 50/51 • •Phase-earth non directional overcurrent 3 independent thresholds 50N/51N • •Thermal overload (true RMS) 2 independent thresholds 49 • •Undercurrent 37 • (NOTE 1)Negative phase sequence overcurrent 46 •Broken conductor detection (I2/I1) •

Blocking logic • (NOTE 1)

Selective relay scheme logic • (NOTE 1)

Cold load pickup • (NOTE 1)

Setting groups 1 2Assignable inputs/outputs • (NOTE 1)

Autoreclose option (4 shots) 79 • (NOTE 1)

Output for striker triggering • •Changeover contact output for trip coil • •Bistable magnetic indicator flag for trip indication • •4 extra magnetic flags option •Output relay latching 86 • (NOTE 1)

Circuit breaker failure 50 BF •Circuit breaker supervision •Measurements (true RMS) • •Peak and rolling values • •Event records • (NOTE 1)

Fault records • •Disturbance records • (NOTE 1)

Rear port RS485 communications • (NOTE 1)

Front port RS232 communications • •(note 1) : Function not available if auxiliary power supply fails.


Optional autorecloser (79)

MiCOM P124 dual-powered relays include an optional 4 shotautorecloser. All programmed protection functions mayindependently start any of the shots and the user can programwhich functions are allowed to trip after any of the shots. Deadand reclaim times are freely adjustable. Front panel LEDs canbe configured to display the status of the autorecloser. Acounter stores the number of reclose commands. Thisinformation can be displayed either locally or remotely. Thisfunction can be activated only when auxiliary power supply ispresent.

Output relay latching (86)

This function is available only for dual-powered versions ofMiCOM P124 relays. Any outputs, including the trip output, canbe latched. Latched outputs can be reset via the activation of alogic input, through the front panel interface or through remotecommunication.

MONITORING FUNCTIONS OFFERED BY THE DUAL-POWERED MODEL

Trip circuit supervision

MiCOM P124 relay constantly monitors trip circuit and ensuresthat they are available.Operation personnel can easily viewthis information, both locally and remotely, and optimiseswitchgear maintenance.

Event recording

75 logic events are stored in MiCOM P124 dual-poweredmodel. Events include inputs/outputs, change of status, alarmsand contacts operations. All events are time stamped to 1ms,and can be accessed either locally or remotely.

Disturbance recording

Up to five records of 3 seconds each can be stored in MiCOMrelays. The current sampling frequency is 1600 Hz. Thedifferent records can be retrieved either locally or remotely.

Measurements

MiCOM P124 relays permanently monitor all current inputs,calculate the frequency and line currents, display values on theLCD and store measurements in memory. The measuredvalues are true RMS up to the 10th harmonic.This data can beaccessed either locally or remotely.

FAULT RECORDING

The last 5 faults are stored inside both models of MiCOM P124relays.

Each fault includes:> Record number> Fault time> Active setting group> Faulted phase> Protection operation> Magnitude of input quantities

Fault indicator helps the user to clearly identify the fault and tomonitor relay setting and operation. In addition, the dual-powered model offers the following functions: time-tagging ofall parameters, status of logic inputs and outputs and remoteretrieval of stored information.

USER INTERFACE

Front panel and menus

The user can program and modify all parameters (protection,communication, automation, LEDs, inputs and outputs)through the front panel user interface. The backlit LCD informsthe user about settings, measurements, faults, etc. The menushave a pull-down structure to allow easy and quick access toany data.

Dedicated LEDs

An healthy LED on the front panel of MiCOM P124 relaysindicates that the relay is correctly energized with sufficientpower from line current. In addition, for the dual-poweredmodel, three LEDs indicate the relay condition (Trip, Alarm,Watchdog).

Configurable LEDs (dual-powered model only)

To facilitate identification of electrical faults, 4 LEDs are freelyprogrammable. Each LED can be programmed to light upwhen one or several thresholds are crossed or when a logicinput is activated.

Dedicated magnetic indicator flag

The front panel also features a bistable magnetic flag thatindicates that the trip order has been issued to operate thecircuit breaker.

Configurable magnetic indicator flags(dual-powered model only)

In order to display faults even when the auxiliary power isdown, four additional bistable magnetic flags exactly replicatethe status of the four programmable LEDs.

RS485 communications

The dual-powered MiCOM P124 includes an RS485communication rear port. This port is available for MODBUSTM,Courier, DNP3.0 or IEC 60870-5-103 protocols. MiCOMrelays can transmit to the monitoring or SCADA system,settings, measurements, alarms, faults, events anddisturbance records. The communication parameters (relayaddress, data rate, parity, etc.) can be programmed using theoperator interface front port. A communication failure does notaffect the protection functions of MiCOM relays.

Communication RS232

The front serial RS232 communication port has been designedto be used with MiCOM S1 Software, which provides theability to program settings off-line, extract and view event,disturbance and fault records, view the measurementinformation dynamically and perform control functions.


ACCESSORIESBattery box

Even when the circuit-breaker is open, i.e. the relay is nolonger energized by the load current, settings can be appliedthanks to a simple and inexpensive battery box.

On one side, this battery box is connected to the RS232 port ofthe relay and on the other side to the PC loaded with thesetting software MiCOM S1.

This battery box temporary energizes the relay and so allowsthe user to quickly and easily retrieve or change the setting ofthe relay.

K1-3 Striker

Associated with a self-powered relay, such as MiCOM P124,the K1-3 Striker converts an electrical pulse of low intensity(<20mA during 25ms) into a mechanical pulse of 4,7 daN, thusallowing the trip of the circuit breaker.

Capacitor Trip Unit MiCOM E124

For applications where there is no auxiliary supply or where astriker can not be used, MiCOM E124 ensures the supply ofenergy to a self or dual poweredrelay, such as MiCOM P124.

This capacitor module has such storage capacity that, in caseof loss of auxiliary supply, it can supply sufficient energy toexcite a standard trip coil for two consecutive tripping orderswithout recharge.

USER INTERFACE

The user interface for MiCOM P124 relay includes:

> back-lit, 2 x 16 characters LCD display,

> four dedicated LEDs to provide information

> four programmable LEDs: Each one lights up whenprotection information is displayed, or if a logic input statechanges

> five trip flags (4 programmable)

> five tactile keys for scrolling through the menus andentering settings the pull-down structure of the menusenables quick and easy access to required information

> 1 key for reading and one for acknowledging alarms

HARDWARE & CASE

All the models of the MiCOM P124 range have a 4Udraw out metal case, and can be flush-mounted in switchboard or panel or rack-mounted. External connectionsare made via MIDOS type terminal blocks. Each connectionincludes two 4.8 mm Faston and one M4 screw fixing.

Case

The relays have a drawout metal 4U shallow case. All CTinputs are short-circuited if the active unit is withdrawn from itscase.

All MiCOM relays can be mounted in a panel or in a rack.Theyrequire no handling operations, since all the settings are put inthrough the operator interface.

Wiring

External connections are made via MIDOS type terminalblocks.

Each connection includes two Faston and one M4 screw fixing.The wiring of both models of MiCOM P124 is standard toprovide maximum compatibility.


TECHNICAL DATA

MECHANICAL SPECIFICATIONS

DesignModular MiCOM Px2x platform relay:P124 – Case 30TE – 4UWeight approx. 4.2 Kg

MountingRack or flush mounting.

ConnectionsRear (two Faston 4.8mm x 0.8 mm + M4 screw perconnection)Full draw-out with automatic CT shorting in the case of therelay.

Enclosure ProtectionFront Panel: IEC 60529: IP 52 and IK 07Rear connection: IP 10

DimensionsSee dimensions diagram.

PC InterfaceDIN 41652 connector (X6),type D-Sub, 9-pin.

ENVIRONMENTAL CONDITIONS

Recommended Ambient temperature rangePer IEC 60255-6: 1988

Operating Temperature Range:Continuous Withstand -25 to +55°C

(13°F to 131°F)Limit (Note 1) -25 to +70°C

(13°F to 158°F)Storage Temperature Range: -25 to +70°C

(13°F to 158°F)

Note 1: The upper limit is permissible for a single 6 hourduration within any 24 hour period.

Ambient Humidity RangePer IEC 60068-2-3: 1969:

56 days at 93% relative humidity and +40 °C

Per IEC 60068-2-30: 1980:

Damp heat cyclic, six (12 + 12) hour cycles, 93% RH, +25 to+55 °C

Solar RadiationAvoid exposure of the front panel to direct solar radiation.

MECHANICAL ENVIRONMENT

Vibration TestIEC 60255-21-1, class 2.

Shock and Bump TestIEC 60255-21-2, class 1.

Seismic TestIEC 60255-21-3, Class 2.

PRODUCT SAFETY

72/23/EEC

Compliance with European Commission Low VoltageDirective. Compliance is demonstrated by reference togeneric safety standards:

EN61010-1: 1993/A2: 1995EN60950: 1992/A11: 1997

TYPE TESTS

InsulationPer IEC 60255-5: 2000,Insulation resistance > 100MW at 500Vdc(Using only electronic/brushless insulation tester).

High Voltage (Dielectric) Withstand(i) Per IEC 60255-5: 2000, 2 kV rms AC, 1 minute:Between all case terminals connected together, and the caseearth, and between all terminals of independent circuits(RS232 ports excepted).

1kV rms AC for 1 minute,across open watchdog contacts.1kV rms AC for 1 minute,across open contacts of changeover output relays.

Impulse Voltage Withstand TestPer IEC 60255-5: 20001.2 / 50 µs, peak value: 5 kV, 0.5J

Between all terminals, and all terminals and case earth.

Electromagnetic Compatibility (EMC)1 MHz Burst Disturbance Test

IEC 61000-4-12, Class 3

Immunity to Electrostatic DischargePer IEC 60255-22-2: 1996, Class 3 and 4

Electrical Fast Transient burstsIEC 60255-22-4 class 4.IEC 61000-4-4 class 4.

Immunity to Radiated Electromagnetic fieldIEC60255-22-3 class 3.IEC61000-4-3 class 3.

Surge Immunity TestIEC 61000-4-5, class 4.

Immunity to Conducted Disturbances Induced by RadioFrequency Fields4 IEC 61000-4-6, class 3.

Power Frequency Magnetic Field ImmunityIEC 61000-4-8, class V.

EMC compliance89/336/EEC93/31/EEC

Compliance with European Commission EMC Directive.Generic standards were used to establish conformity:EN50081-2: 1994EN60952-2: 1995


RATINGSAC INPUTSNominal Frequency 50/60 HzOperating range 45 to 65 Hz

AC Current

Phase current inputs 1 or 5 A (specify at order)

Earth current inputs 1 or 5 A (specify at order)

Thermal withstand 1s @ 100 x rated current2s @ 40 x rated currentcontinuous @ 3 x rated current

Minimum level of current required for relaypowering

0.2In

POWER SUPPLY (DUAL POWERED MODEL)

Nominal AuxiliaryVoltage Vx

24-60 Vdc;

48-150 Vdc

130-250 Vdc

100-250 Vac 50/60 Hz

Operating range DC ± 20% of Vx

AC – 20%, +10% of Vx

Aux supply ripple Up to 12%

Stored energy time = 50 ms for interruption of Vx

Burden P124 DC: 3W on standby + 0,25W perenergised relay

AC: 6VA

LOGIC INPUTS AND OUTPUTS

Logic Input (Dual Powered Model)

The logic inputs shall be powered with a DC voltage,excepted the M auxiliary voltage range which acceptsboth DC and AC voltage as logic input control voltage.

Logic input type independent optical isolated

Logic input burden <10 mA per input

Logic input recognition time (DC) < 5 ms

Logic input operation

CortecCode

Relay auxiliaryvoltage range

Auxiliary voltagerange for the logic

inputs

Minimumpolarisation voltagelevel (Volt)

Minimumcurrent level

A 24 - 60 Vdc 24 - 60 Vdc (*) 15 Vdc 3.35 mA

F 48 - 150 Vdc 48 - 150 Vdc (*) 25 Vdc 3.35 mA

M 130 - 250 Vdc100 - 250 Vac

130 - 250 Vdc (*)48 - 250 Vac (*)

38 Vdc38 Vac

2.20 mA1.90 mA rms

H 125 - 250 Vdc100 - 250 Vac

105 - 145 Vdc 96 Vdc 1.80 mA

V 48 - 150 Vdc110 - 250 Vac

110 Vdc(-30% / +20%) 77Vdc 7.4mA at

110Vdc

W 125 - 250 Vdc110 - 250 Vac

220 Vdc(-30% / +20%) 154Vdc 3.8mA at

220Vdc

* The tolerance on the auxiliary voltage variationsfor the logic inputs is ±20% in dc voltageand –20%, +10% in ac voltage.

Output relaysContact relay: Dry contact Ag Cd OMake current: 30 A and carry for 3 sCarry capacity: 5 A continuous

Breaking capacity:

50 W resistive or 25W inductive (L/R=40ms)ac 1 250 VA resistive

or 1 250 VA inductive (PF 0.5)

Operation time: < 7 msMechanical durability:

Loaded contact > 10 000 operationsUnloaded contact > 100 000 operations

Burdens> Consumption per phase

In = 1A or In = 5APhase 2.5VAEarth 2.5VA

> Logic input (dual-powered model)24-60V → 9-mA max48-150V → 4.7 mA max130-250V → 2.68 mA max


PROTECTION SETTING RANGESMinimum level of current required for relaypowering

0.2In

Overcurrent settings> Phase current

I> 0.1 to 4 InI>>, I>>> 0.5 to 40 In

> Earth current 0.0002 to 1Ion0.01 to 8 Ion0.1 to 40 Ion

Note : Some limitations exist when I > (Ie>) is usedwith IDMT curves see Technical Guide.

> Instantaneous time (phase & earth)> 30ms for an initial current of 0.2 In< 60ms for zero initial current

> Drop-out time 30ms

Overcurrent time settings> Phase (t I>, t I>>, t I>>>)

0 ms to 180 sEarth (t Ie>, t Ie>>, t Ie>>>)0 ms to 180 s

> IDMT curves :IEC and special type :

Short time inverse (A),Standard Inverse (IEC),Very Inverse (IEC),Extremely Inverse (IEC),Long time Inverse (A),Rectifier curve (RC).

IEEE/ANSI type :Short time inverse (CO2),Moderately Inverse (ANSI),Inverse (CO8),Very Inverse (ANSI),Extremely Inverse (ANSI),Electromechanical type (RI).

LABORELEC curves 1, 2 & 3 :On earth current range 0.01 to 8 Ion only.

> 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),

Thermal Overload> Range I0 > 0.2 to 3.2 In > Alarm and trip

50 to 200% x

> Definite time 1 to 200 mn,in 1mn steps

Cold load pick-up> Range 20 to 500% of earth and phase stages> Time-delay 0 to 3600s, in 0.1s steps

Undercurrent> Thresholds I< :

Range: 10 to 100% In> Time-delay: 0 to 180s, in 10ms steps

Negative sequence overcurrent> Range I2>:

0.1 to 40 In> Time-delays> Definite time

0 to 150s> Inverse time (curves identical to thresholds I> or Ie)

Broken Conductor> Thresholds I2/I1:

20% to 200%,> Time-delay

1 to 14400s, in 1s steps

Autorecloser > Dead times 1 & 2

0.01 to 300s, in 0.01 s steps> Dead times 3 & 4

0.01 to 600s, in 0.01 s steps> Reclaim time

0.02 to 600s, in 0.01s steps

Breaker failure> Threshold I>

2% to 100% In> Timer tBF 30ms to 10s, in 10ms steps> Detection <15ms

Trip circuit supervision> Timer tSup 100ms to 10s, in 50ms steps

Ancillary timers> 2 independant timers :

tAUX 1 and tAUX 20 to 200s, in 10ms steps


EVENT RECORDER

Capacity 75 events

Time-tag to 1 millisecond

Triggers Any selected protection alarm andthreshold

Logic input change of stateSelf test eventsSetting changes

FAULT RECORDER

Capacity 5 faults

Time-tag to 1 millisecond

Triggers Any selected protection alarm andthreshold

Data Fault dateProtection thresholdsSetting GroupAC inputs measurements(RMS)Fault magnitudes

DISTURBANCE RECORDER

Capacity 5 records of 3 s each

Sampling rate 32 samples per frequency cycle

Settings Pre-time 100 ms to 3 s, step of 100 msPost-time 100 ms to 3 s, step of 100 ms

Triggers Any selected protection alarm and thresholdLogic inputRemote command

Data AC input channelsDigital input and output statesFrequency value

ACCURACY> Protection thresholds

+/-2%> Time delay

+/- 2% with a minimum of 10 ms> Measurements typical

+/- 0.2% at In

COMMUNICATIONSFRONT PORT (RS232)

Front port Communication Parameters (Fixed)

Protocol Modbus RTU

Address To be specified in the« COMMUNICATIONS » menu of the

relay

Messages format IEC60870FT1.2

Baud rate 19200 baud

Parity None

Stop bits 1

Data bits 8

REAR PORT (RS485)

Rear portsettings

Setting options Setting availablefor:

Remote address 0 - 255 (step = 1) IEC 103/ Kbus-Courier / Modbus

RTU

Baud rate 9 600 or 19 200 bits/s IEC 103

Baud rate 300, 600, 1200, 2400,4800, 9600, 19 200 or

38 400 bits/s

Modbus

Baud rate 64000 bits/s Kbus

Parity “Even”, “Odd” or“Without”

Modbus RTU

Stop bits 0 or 1 or 2 Modbus RTU


CASES & DIMENSIONS

MiCOM P124 relays are available in 4U metal case for panelor flush mounting.

Weight: about 2.9 kg

External size:

Height

Case 152 mm

Front Panel 177 mm

Width

Case 148.1 mm

Front Panel 155 mm

Depth

Case 140.8 mm

Front Panel + case 166 mm


CONNECTION DIAGRAMS

P124

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33

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MiCOM P124Guide Form Specification

Self-powered phase and earth numerical overcurrent relay indrawout 4U metal case.The following functions are available:

> Tripping of the circuit-breaker is entirely independentfrom any external auxiliary supply.

> 3 independent phase stages (instantaneous andtime-delayed) (50/51)

> 3 independent earth stages (instantaneous and time-delayed) (50N/51N)

> Type IEC tripping curves (short time inverse,standard inverse, very inverse, extremely inverse,long time inverse) and IEEE/ANSI (short timeinverse, moderately inverse, inverse, very inverse,extremely inverse)

> Negative sequence overcurrent (46)> Undercurrent (37)> Thermal overload (49)> Broken conductor detection> Output relay latching (86)> True RMS values display> Fault recorder with the last 5 faults

With the addition of an external auxiliary source, the followingfunctions become available:

> 4 independent shot autorecloser (79)> Circuit breaker monitoring> Trip circuit supervision> Circuit breaker failure detection (50 BF)> Event recorder with the last 75 events, 1ms time

stamped.> Recording of measurements and time-tagged

records of the 5 most recent faults> Disturbance recorder with storage of 5 records for 3

seconds each, sampled at 1600Hz> A RS485 rear port compatible with MODBUS,

Courier, DNP3 or IEC 60870-5-103

The user interface includes:

> A 32 characters back-lit display> An RS232 port on the front panel for downloading

application software and a setting software programon PC.

> Possibility of setting the relay with a supply devicevia front panel RS232 port.


ORDERING INFORMATION

A

B

C

1

5

S

A

F

M

0

1

2

3

4

0

1

2

3

4

5

6

7

8

A

1

2

5

6

P 1 42MiCOM

Earth current input

0.1-40Ion0.01-8Ion0.002-1Ion

Rated Current Ph & E/Gnd CT secondary

1A5A

Vaux CODE

SELF POWERED (without auxiliary supply)

DUAL POWERED (with auxiliary supply)

24-60Vdc48-150Vdc130-250Vdc / 100-250Vac

Communication protocol

SELF POWERED (Vaux Code S)

No rear port communication

DUAL POWERED (Vaux Code A,F,M)

MODBUSK-BUS/COURIERIEC 60870-5-103DNP3

FrenchEnglish/AmericanSpanishGermanItalianRussianPolishPortugueseDutchCzech

OPTIONS: Magnetic Flag number & Integral AutorecloseSELF POWERED ONLY (Vaux Code S)

STANDARD :1 flag, no AutorecloseDUAL POWERED ONLY (Vaux Code A,F,M)

STANDARD :1 flag, no AutorecloseOPTION with 4 additional flags, no AutorecloseOPTION with 4 additional flags with Integral Autoreclose

1

AccessoriesBattery box for settings MICOM E1Secondary cover for 30TE case, with push buttons SC30

Language (see Note 1)

Note 1: Please contact us for language availability

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