P225

MiCOM P225Motor Protection

Relay

MiCOM P225

Motor Protection Relay

T&DProtection & Control

2

MiCOM P225Motor Protection Relay

IntroductionThe MiCOM P225 relay performs afull range of motor protectionfunctions based on the measurementof current, voltage and temperature.In addition to these basic functions,the relay carries out a large numberof other functions that enable it toprotect and run the motor moreeffectively.

The reliability of the system is furtherenhanced via checks on bus voltageprior to start-up, supervision of trip-circuit wiring continuity andprotection against circuit-breakerfailure.

The MiCOM P225 relay is usedparticularly in motors driving loads ofhigh inertia; its anti-backspinprotection ensures that the rotor stopsbefore the motor can be re-started.

For motors whose current supplycontains a considerable degree ofdistortion, the relay provides a trueRMS base thermal image allowingefficient protection against overloadphenomena due to the presence ofharmonic components.

The addition of power measurementand energy metering, and thepresence of 2 analogue outputs(current loop) make the MiCOMP225 a highly competitive andeffective piece of equipment in termsof price and practicality.

Protection and ControlThermal overload (49)True RMS base

The thermal image of the MiCOMP225 relay allows for simultaneousprotection of the rotor and statorwindings of the motor, whatever theoperating conditions of the machine,under and overload operatingconditions, during start-up, with rotorlocked or with the motor off.

Classic I2t thermal images affordprotection to stator windings but donot take account of overheating inthe rotor during a current unbalance.Similarly, the presence of harmoniccurrent components causesadditional overheating of the statorwindings. In order to take thisoverheating properly into account,the P225 relay separates thenegative sequence current andreconstitutes it with the true RMSvalue of the stator currents absorbedby the motor.

The result is better protection againstoverloads and hence a markeddecrease in the risk of motordamage.

The thermal image can be correctedby a RTD measuring ambienttemperature.

An alarm threshold, trippingthreshold and thermal threshold,beyond which the motor cannot bere-started, are available.

MiCOM P225

Short-circuit (50/51)A phase overcurrent element allowsfor the detection of faults betweenphases. In addition to this short-circuitthreshold, a time-delayed signal andan instantaneous signal areavailable to provide better selectivity.

Excessive start time(48/51)

Whether the motor is unloaded orcoupled to a heavy load, thisfunction monitors the duration of themotor start-up phase.

The choice of the motor’s start-updetection criteria makes it possible touse this function, whatever themotor’s start-up mode: eg, direct-on-line, star-delta, auto-transformer,resistor insertion, etc.

Figure 1: Thermal image characteristic curves

Thermal constant times :- overload condition: Te1 = 12 minutes

- startup condition: Te2 = 6 minutes

0

1

10

100

1 000

10 000

0,1 1 10

Thermal equivalent current Ieq in terms of the current thermal threshold Iθ>

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Cold curveThermal status

= 0 %

Hot curveThermal status = 90 %

3

Locked rotor while running orat start-up (50S/51LR)

During normal motor operation, anovercurrent threshold detects rotorstalling.

During motor start-up, a locked rotoris detected with the help of a speedswitch input.

Unbalance, loss of phase andsingle phasing (46)

Two overcurrent elements based onthe negative sequence component ofcurrent are available. One isassociated with an IDMTcharacteristic, while the other has adefinite time characteristic. The twoelements make it possible todifferentiate between a short or lowamplitude unbalance and a moremarked phenomenon such as loss ofphase or single phasing.

Earth fault (50N/51N)

Two zero phase sequenceovercurrent elements are available.Each threshold has instantaneousand delayed signal at its disposal.

The adjustment range for earthcurrent threshold varies from 0.002to 1 Ion, allowing maximumsensitivity for earth fault detection.

The relay’s earth current input can bewired to a core balanced CT or tothe summation of the three-phase CTs.

Loss of load (37)

Loss of load, caused by shaft ruptureor the unpriming of a pump, isdetected by a timed minimum phasecurrent threshold. This function canbe deactivated during the start-upphase so that the motor cangradually increase its load.

Temperature monitoring(38/49)

As an option, 10 RTDs can beconnected to the MiCOM P225 relayto monitor the motor’s temperature.For each of the 10 RTD channels,two temperature thresholds withindividual time-delay settings areavailable. It is therefore possible tomonitor stator windings separately,as well as the spin bearings of themotor and the load involved.

If the motor is equipped withthermistors, the P225 relay monitorstemperature via its three thermistorinputs.

Re-acceleration authorisation(27 LV)

The relay can detect voltage sag viaits voltage input. Depending on theduration of the voltage sag, theP225 relay can authorise a re-acceleration of the motor when fullvoltage returns or, on the other hand,stop the motor to let the motors mostcritical to the process re-accelerate.

As a result, process continuity isimproved

Undervoltage (27)

If voltage supply drops or is lostcompletely, a phase-to-phase undervoltage threshold causes the motor tostop. This function can be selectivelyput into or out of operation duringthe motor start-up phase.

Overvoltage (59)

An overvoltage threshold protectsagainst overvoltage and also givewarning of ageing insulators.

Limitation of thenumber of starts,time between starts (66)

The number of motor start-ups can belimited. The P225 relay candiscriminate between a warm and acold motor, making it possible tooptimise the number of start-upsallocated to a particular motor overa given period of time.

Setting a minimum delay betweentwo start-ups avoids exposing themotor and its start-up system to over-large resultant stresses.

Anti-backspin

If a motor with a high inertia load,for example a fan, is stopped, theshaft continues to rotate for sometime before the rotor stopscompletely. If the motor is switchedback on while the rotor is still turning,something akin to a false couplingmay occur, causing mechanicaldamage such as broken fan blades.

The risk of such problems can beeliminated by setting a minimumtime-lapse between stopping themotor and re-starting it.

Presence of bus voltage priorto start-up

Prior to starting the motor, the P225relay checks that voltage levels aresufficiently high before authorisingthe start-up sequence.

Emergency start-up

When required by safety conditionsor by the process, a logical input ofthe P225 relay can be used to allowmotor start-up. All start-up restrictionswill then be inhibited and thethermal image function will bedisabled.

Latching of output relays (86)

The trip order can be maintained toavoid the risk of re-starting on anelectrical, mechanical or thermalfault.

Figure 2: Negative phase sequenceprotection-inverse timecharacteristic curve

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4

CB failure (50BF)

The CB failure on fault will bedetected very quickly by the P225relay, which will then either send anew local tripping signal or actdirectly on the immediatelyupstream CB.

By speeding up the time taken toclear the fault in the case of CBfailure, the P225 relay helpsmaintain the stability of the networkand the reliability of the protectionsystem.

Trip circuit supervision

Supervision of wiring continuity in thetrip circuit makes the system morereliable. The relay can detect abreak in the circuit, whether the CB ison or off.

External trips

The P225 relay accepts externalbinary signals, which can be used togive a trip or alarm signal, or whichmay simply be treated as binaryinformation to be passed up throughthe relay to a remote control system.

Logical gates

MiCOM P225 can achieve up to 4AND logical gates linked to timedelays, by combining internal andexternal information with theprotection relay. The user can alsocreate OR gates by individuallyprogramming each output relay. Thelogical gates help make economieson external relaying and make therelay interactive with the process.

Two setting groups

By virtue of its two setting groups, theMiCOM P225 relay allows for theprotection of dual-speed motors aswell as motors operating underenvironmental or operationalconditions, which are not constantaover time. A change of settinggroup can be useful following achange in source impedance. Theresult is improved selectivity.

Measurements andMonitoringMeasurementss

The MiCOM P225 relay constantlymeasures a large amount ofelectrical data, such as:

• Phase current magnitude in trueRMS value: IA,IB, IC

• Neutral current magnitude in trueRMS value: IN

• Positive sequence current I1

• Negative sequence current I2

• Zero sequence current Io

• Unbalance ratio I1/I2

• Frequency

• Peak current value

• Phase-to-phase voltage in trueRMS value

• Active and reactive power PWand PVAR

• Active and reactive energies Whand VARh

• Power factor

To provide the user with moreaccurate information on the motor’sstatus and availability, the P225relay keeps track of:

• Thermal status of the motor

• Load value as a % of full loadcurrent

• Time to thermal trip

• Temperature of each RTD

• Hottest RTD

• Authorised start number

• Time before another start-upauthorisation

• Last start current magnitude

• Last start time value

• Number of starts andemergency starts

• Total motor running hours

Analogue outputs

Two optional analogue outputs areavailable. Some information andmeasurements such as power,energy and temperature values, etc.,can be fed through a current loopto a PLC.

Trip cause statisticsThe MiCOM P225 relay provides theuser with trip statistics for everyprotection function. The user can thuskeep track of the number of trips,which have taken place as well astheir origin.

CB monitoring

Preventive CB maintenance isprovided by monitoring summatedcontact breaking duty, the number ofswitching operations and theopening time. If a pre-set threshold isexceeded, the P225 relay willgenerate an alarm signal.

Event records

The last 75 status changes arerecorded in a non-volatile memory.This covers all status changes to logicinputs and outputs, modifications toone or more parameters, alarmsignals or the operation of one of theoutput contacts. Events are loggedevery 1 ms.

Fault recordsThe P225 relay records the last 5faults. For every fault, the relayrecords and indicates:

• A fault number• The date and time• The active setting group• The faulty phase or phases• The function that gave the trip• The magnitude of the value that

gave rise to the trip command• The values of the phases and

earth currents and voltage.

Oscillography5 disturbance records, of 2.5seconds each, can be stored, with aresolution of 32 samples per cycle.Oscillography data can beuploaded via the communicationnetwork (RS485) or locally (RS232).

Figure 3: Oscillography analysis usingMiCOM S1 softwarefor optimum results

Disturbance Record Analysis

5

Shape of start-up currentand voltage

The MiCOM P225 relay records theenvelope of both start-up current andvoltage signals with a resolution ofone sample for every 5 periods.This recording can be uploaded to aPC via the communication network orvia the RS232 port on the front plate.

It is very helpful to be able tovisualise these curves duringcommissioning and this function ofthe MiCOM P225 avoids the needfor a plotter.

Back-up battery

In case of loss of auxiliary power, thememory safeguard of all dataconcerning event records, faultrecords, oscillography and start-upcurrent and voltage waveform iscarried out by a 3.6 V battery.

User InterfaceFront plate and menus

All the relay’s parameters, ie.,protection functions, logic controls,communication, LEDs, inputs andoutputs, can be programmed andmodified by push-buttons located onthe front panel.

An alphanumeric, backlit, 32-character LCD screen displays all therelay’s data (settings, measurements,etc.).

The menus are designed so that theuser can move around them easily,without confusion. The user will soonbe at ease with the Human-MachineInterface.

Fixed LEDs

On the front panel of MiCOMrelays, 4 LEDs show the relay’s status(Trip, Alarm, Equipment fault andHealthy).

Programmable LEDs

MICOM P225 relay offers freeprogramming of 4 LEDs. Each LEDcan be assigned to one or morefunctions or logic states, eg., “motorrunning”, or “successful start-up”.These LEDs avoid the need forexternal signal lights.

10 RTD's or3 thermistor inputs

Line-line VT

phaseCT's P225

30

WD

RS232

RS485

Trip outputrelay

27 59 27LV 6614TCSTrip52

3

Motor

86 50BF

50 51 48 50S 51LR 49 46 37

51N50N

ABS 74

38 49Option Option

0 - 20 / 4 - 20 mA

2 analogueoutputs

Earth CT

6 logicinputs

4 auxiliaryoutput relays

Watchdog

Remote controlRS485

Setting and control software

Busbar

Figure 4: MiCOM S10 Control System

Figure 5: MiCOM S1 Software

S 10S 10Userinterface

Printer

Push-buttons

The operator menu is accessed via 7touch-sensitive buttons.

Communication

The MiCOM P225 relay is equippedwith a RS485 port on its rear plate,which enables it to communicate viaMODBUSTM, Courier or IEC 60870-5-103. It is thus possible to transmitadjustment values, measurementdata, alarm signals and all otherrecordings to the Substation ControlSystem (eg. MICOM S10) or to aSCADA (Supervisory Control andData Acquisition System).

Communication parameters(equipment address, data rate,parity, etc.) can be adjusted by theoperator via the user interface.Communication failure does notaffect MiCOM relays’ protectivefunctions.

MiCOM S1 setting andconfiguration software

MiCOM S1 software makes itpossible to pre-set all MiCOM P225relay parameters from a PC.

The relay is then accessed via theRS232 port on the front panel.

MiCOM S1 software is fullycompatible with WindowsTM (95,98, NT), and can download relaysettings, pull up current relay settingsand upload measurement values,diagnostic data, fault records,oscillography, start-up current andvoltage shapes and event loggingdata.

Mechanical AspectsThe MiCOM P225 relay is fullydigital.

Housing

The MiCOM P225 relay is housed ina compact 4U case. The relay canbe withdrawn from its case with thesupply voltage on due to thepresence of internal shorting linksprotecting the current circuits. TheMiCOM P225 can be either rack orflush-mounted.

Connectors

The connectors are of the MiDOStype. Each terminal has a type M4screw outlet and 2 blades.

Only the temperature sensors,thermistors and analogue outputs areconnected by terminal screws.

All current inputs are 1 and 5 Ampsdual-rated.

Figure 6: Application diagram

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P225 : Typical connection diagram

7

P225 : Typical application diagram

27+-

ProgrammableInput L6

MiCOM P225

25

19

17

13

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trippingProgrammable

Output RL3Programmable

Watchdog


ProgrammabkeOutput RL2

Core balanced CTCT phase A

CT phase B

CT phase C

temperatureStator

Fuse

A

B

C

Contactor coil

Vaux

OnOff Emergency stop

Klaxon

Signalling lamp

SourceauxiliaireVaux

Emergency startup

External reset

Fuse blown

52a

powerAuxiliary

status 52AContactor

Input L1


(green connector)Analogue output

Speed swith signalInput L2

Vaux

RS48

5C

omm

unic

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10 RTD's inputs(green connector)

PC/PLCsupervisor

Ambienttemperature

Bearingstemperature

Motor 14

PLC

Signalling

Signalling

The MICOM P225 is shown with power supply off.

Input L523 -Programmable

21 +

PLCAnalogue output(green connector)

+28 b-

28 d/z

Load bearingstemperature

7

11

9

40

39

Phase rotationC B

ALine A-Line C VT

Thermal state value reset

used forstart inhibitionpurpose

output relay

Technical SpecificationsInputs

• Phase current In 1 and 5 A

• Earth current Ion 1 and 5 A

• Phase A-Phase C voltage Vn :57-130 V (range A)220-480 V (range B)

• Frequency 50/60 Hz

Auxiliary voltage supply Vaux

• 3 ranges 24–60 Vdc

48–150 Vdc

130-250 Vdc/100-250 Vac

• Variation ±20%

• Residual peak-to-peak ripple12 %

• Power off withstand> 50 ms

Burdens• Phases currents

< 0.3 VA @ In (5A)

< 0,025 VA @ In (1A)

• Earth current < 0.01 VA @ 0.1Ion (5A)

< 0,004 VA @ 0.1 Ion (1A)

• Voltage < 0.1 VA @ Vn

• Auxiliary voltage supply< 3 W + 0.25 foreach output relayenergised in Vdc

< 6 VA in Vac

• Logic inputs < 10 mA per input

Thermal withstand• Phase and earth current inputs

100 In – 1 s

40 In – 2 s4 In – continuous

• Voltagerange A260 V – continuous300 V – 10 srange B960 V – continuous1300 V – 10 s

Accuracy

• Protection thresholds±2%

• Time delays±2% minimum of 10 ms

• Measurements (typical)±0,2% @ In – current

±0,2% @ Vn – voltage

±1% @ Pn – power

±2°C – temperature

• Pass-band for measurements of true RMS values

500Hz

8

CT data

• Phases CT Primary1 to 3000A in steps of 1A

• Earth CT Primary1 to 3000A in steps of 1A

• Phases CT Secondary 1 or 5A

• Earth CT Secondary 1 or 5A

• Recommended phases CT5P10 - 5VA (typical)

• Recommended Earth CTResidual connection orcore-balanced CTconnection (preferred inisolated neutral systems)

• VT primary1 to 20 000 V in steps of 1V

• VT Secondary(A) 57 to130 V in steps of 0.1 V

(B) 220 to 480V in steps of 1 V

Optional analogue outputs

• Rating 0-20 mA, 4-20 mA

• Insulation 2 KV

• Maximum load with active source mode 500 Ω

• Maximum voltage with passive source mode 24 Volt

• Accuracy ±1% full scale

Optional 10 RTD inputs

• RTD typePT100, Ni100, Ni120, Cu10

• Connection type3 wires + 1 shielding

• Maximum load25 Ω (Pt100, Ni100, Ni120)2,5 Ω (Cu10)

• Insulation2 kV, active source mode

• Threshold settings0 to 200 °C in steps of 1°C

• Time delay settings0 to 100 s in steps of 0.1 s

• Thermal image influenceYes/No

Optional 3 thermistor inputs

• Type of thermistor PTC or NTC

• Maximum load 100 Ω

• Threshold settings 100 to 30 000 in steps of 100 Ω

• Time delay Fixed at 2 seconds

Thermal image settings

• Thermal current threshold Iθ >0,2 to 1,5 In, steps of 0,01 In

• Overload time constant Te11 to 180 min in steps of 1min

• Start-up time constant Te21 to 360 min in steps of 1min

• Cooling time constant Tr1 to 999 min in steps of 1min

• Negative sequence current recognition factor Ke

0 to 10 in steps of 1

• Trip threshold Fixed at 100 %

• Thermal alarm threshold20 to 100% θ in steps of 1% θ

• Start-up prevention20 to 100% θ in steps of 1% θ

Short-circuit protection• Current threshold I>>

0.2 to 12 In in steps of 0.1 In

• Time delay t I>>0 to 100 s in steps of 0.01 s

• Operating time < 30 ms

• Drop-off time < 30 ms

Excessive start time protection

• Start-up detection criteriaClosure 52 or (Closure 52 +current threshold) optional

• Current threshold Istart1 to 5 Iθ in steps of 0.5 Iθ

• Time delay t Istart1 to 200 s in steps of 1 s

Locked rotor protection

• Current threshold Istall1 to 5 Iθ in steps of 0.5 Iθ

• Time delays t Istall0.1 to 60 s in steps of 0.1 s

• Locked rotor at start-up detectionYes/No

Unbalance protection• Negative sequence current threshold I2>

0.04 to 0.8 In, steps of 0.01 In

•Time delay tI2>0 to 200 s, steps of 0.01 s

• Negative sequence current threshold I2>>

0.04 to 0.8 In, steps of 0.01In

• IDMT time delayt = TMS x 1.2 / (I2/I2>>)

• TMS time multiplier0.2 to 2 steps of 0.025

Earth fault protection

• Current thresholds Io>, Io>>0.002 to 1 Ion,

steps of 0.001 Ion

• Time delays tIo>, tIo>>0 to 100 s in steps of 0.01 s


• Drop-off time < 30 ms

Undercurrent protection

• Current threshold I<0.1 to 1 In in steps of 0.01 In

• Time delay tI<0.2 to 100 s in steps of 0.1 s

• Start-up prevention time Tinhib0.05 to 300 s in steps of 0.1

Limitation of the number ofstart-ups

• Reference period T reference10 to 120 min, steps of 5 min

• Number of cold starts 1 to 5 in steps of 1

• Number of hot starts 0 to 5 in steps of 1

• Restart prevention time Tinterdiction1 to 120 min in steps of 1 min

Time between two start-ups

• Prevention time Tbetw 2 starts1 to 120 min in steps of 1 min

Anti-backspin protection

• Restart prevention time tABS 1 to 7200 s in steps of 1 s

Re-acceleration autorisation

• Voltage collapse detection(A) 5 to 130 V in steps of 0.1 V

(B) 20 to 480 V in steps of 0.5 V

• Voltage retoration detection(A) 5 to 130 V in steps of 0.1 V(B) 20 to 480 V in steps of 0.5 V

• Duration of voltage collapse Treacc0.1 to 10 s in steps of 0.01 s

Undervoltage protection

• Voltage threshold V<(A) 5 to 130 V in steps of 0.1 V(B) 20 to 480 V in steps of 0.5 V

• Time delay tV< 0 to 600 s in steps of 0.01 s

• V< inhibition during start sequenceYes/No

9

Overvoltage protection

• Voltage threshold V>(A) 5 to 260 V in steps of 0.1 V(B) 20 to 960 V in steps of 0.5 V

• Time delay tV>0 to 600 s in steps of 0.01 s

Presence of bus voltage priorto start-up

• Voltage threshold(A) 5 to 130 V in steps of 0.1 V(B) 20 to 480 V in steps of 0.5 V

CB failure

• Current threshold I< BF0.1 to 1 In in steps of 0.01 In

• Time delay tBF0.03 to 10 s in steps of 0.01 s

Trip circuit monitoring

• Time delay tSUP0.1 to 10 s in steps of 0.01 s

AND logical gates

• 4 “AND” logical gates

• Pick-up time delays0 to 3600 s in steps of 0.1 s

• Reset time0 to 3600 s in steps of 0.1 s

Latching of output relays

• Trip relay (RL1)Configurable for each trip order

• Other relays (RL2, RL3, RL4 et RL5)Configurable for eachauxiliary relay

CB control and monitoring

• Close command hold0.2 to 5 s in steps of 0.1 s

• Open command hold0.2 to 5 s in steps of 0.1 s

• Number of operations alarm0 to 50 000 operationsin steps of 1

• Summated contact breaking duty106 to 4 000.106,

steps of106

• Setting of exponent “ n ” 1 or 2

• Opening time alarm0.05 to 1 s in steps of 0.05 s

Output relays

• Number of output relays6 (5 programmable +1 watchdog)

• Commutation capacity

Make and carry: 30 A for 3 s

Carry continuously: 5 A

Break:135 Vdc, 0.3 A(L/R = 30ms)

250 Vdc, 50 W resistive

250 Vdc, 25 Winductive (L/R = 40 ms)

250 Vac, 5A(50/60Hz – cos ϕ = 0.6)

• Durability > 100 000 operations


Oscillography

• Number 5 records

• Duration of each record 2.5 s

• Sampling rate 32 samples per cycle

• Pre-time setting 0.1 to 2.5 s in steps of 0.1 s

• Post-time setting 0.1 to 2.5 s in steps of 0.1 s

MODBUSTM communication

• Mode RTU (standard)

• Transmission mode Synchronous

• Interface RS 485

• Data rate 300 to 38 400 baud

• Relay address 1 to 255

• Connection Multi-point (32 connections)

• Cable typeHalf duplex (screenedtwisted wire pair)

• Maximum cable length 1000 metres

• Connector Connector screws or snap-on

• Insulation 2 kV RMS

High voltage withstand

• Dielectric withstand (50/60Hz)IEC 60255-5 - BS 142 -ANSI C37.902 kV in common mode1 kV in differential mode

• Impulse voltage (1,2/50 µs)

IEC 60255-5 - BS 1425 kV in common mode1 kV in differential mode

• Insulation IEC 60255-5 > 100 M Ω

Electrical environment tests

• HF disturbanceIEC 61000-4-12.5 kV in common mode,class 31 kV in differential mode,class 3

• Fast transient disturbanceIEC 61000-4-4,ANSI C37.90.14 kV auxiliary power, class 42 kV others, class 4

• Electrostatic dischargeIEC 61000-4-28 kV, class 4

• Radio frequency impulseANSI C37.90.2 35 V/mIEC 61000-4-3 10 V/m

Environmental withstand

• TemperatureIEC 60255-6

Storage and transport-40°C to +70°C

Operation-25°C to + 55 °C

• HumidityIEC 60068-2-356 days at 93% RH and 40°C

• Enclosure protectionIEC 60529 IP 52, IK 07

• VibrationIEC 60255-21-1Response and endurance,class 2

• Shocks and bumpsIEC 60255-21-2Response and enduranceclass 1

• Seismic withstandIEC 60255-21-3 Class 2

conformity toIEC 60 947-1(EMC and LV directives)

10

151(5.94) 0.2(Top view)

Front panel

150.2 (5.91)

148.1 (5.83)

4 holes 3.4(0.134)

4 holes 4.4 (0.18)

168 (6.61)

(Panel cut-out)

159 (6.26)

Flush mounting

223 (8.77)

1.5

25.1(0.99)

155 (6.10)

30TE

(Frontal view)

177(6.97)

(Right side view)11 (0.43)

Flush mounting

156 (6.14)

129.6 (5.10)

103.6 (4.08)

10.7 (0.42)

23.7 (0.93)

D clench

Alarme

D fauquip

Alim.Aux.

D c.1

D c.2

D c.3

D c.4

MiCOM P225

+ 0.20

Dimensions are in mm - Dimensions inside brackets are in inches

Temp ratureRTD1= 113 C

General DescriptionDigital motor protection

• Thermal image for both stator androtor protection, true RMS basemodel, 2 thresholds (49)

• Thermal image controlled byexternal temperature

• Short-circuit protection (50/51)

• Excessive start-time protection (48/51)

• Locked rotor while running or atstart-up (50S/51LR)

• Unbalance protection, loss ofphase, single phase, 2 thresholds(46)

• Earth fault protection, 2 thresholds(50N/51N)

• Under-current protection, loss ofload (37)

• Overtemperature protection(49/38)

• Undervoltage protection (27)

• Overvoltage protection (59)

• Check bus voltage prior to start-up

• Re-acceleration authorisation(27 LV)

• Limitation of number of start-ups(66)

• Minimum time between twostart-ups

• Anti-backspin protection (ABS)

• Thermal criteria for start-upprevention

• Emergency start-up

• Monitoring of 10 RTDs: PT100,Ni100, Ni120 ou Cu10 (optional)

• Monitoring of 3 thermistors PTC,NTC (optional)

• 2 analogue outputs (optional)

• Speed switch input

• Latching of the output relays (86)

• CB failure protection(50 BF)

• Trip circuit supervision (TCS)

• External reset

• AND logical gates

• Programmable logic inputs andoutputs

• Programmable LEDs

• 2 setting groups

• True RMS measurements, 10th

harmonic (50Hz system)

• CB control and command

• Event records (75 events)

• Time tag I ms

• Fault records (5 faults)

• Integrated oscillography (5records)

• Start-up current and voltageshapes records

• Trip cause statistics

• Relay withdrawable with supplyvoltage on

• MODBUSTM, Courier and IEC60870-5-103 communication

• RS232 port on front plate

• Setting and control software underWindowsTM

• Commissioning tools

Figure 7: P225 Case size

11

C

AFM

123

012345678A

02

03A

MiCOMP 2 2 5

22 5 0C

MiCOM

1

Earth current input

Auxiliary supply voltage

Optional temperature monitoring

Optional 2 analogue outputs

0.002-1 Ion

Communication protocol

HMI language

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

FrenchEnglish/AmericanSpanishGermanItalianRussianPolishPortugueseDutchCsech

No3 thermistors monitoring10 RTDs monitoring

NoYes

MODBUSK-BUS/CourierIEC 60870-5-103/VDEW

Voltage input

57-130 V220-480 V

AB

Information required with order

Your contact:

60, Route de Sartrouville - BP 58, 78230 Le Pecq Cedex (France)Tel: 33 (0) 1 34 80 79 00 Fax: 33 (0) 1 34 80 79 13 Email: [email protected] Internet: www.tde.alstom.com

© ALSTOM 2000. ALSTOM , the ALSTOM logo and any alternative version thereofare trademarks and service marks of ALSTOM.Other names mentioned, registered or not, are the property of their respective companies.

Our policy is one of continuous development. Accordingly the design of our products may change at any time. Whilst every effort is made to produce up to date literature, this brochure should onlybe regarded as a guide and is intended for information purposes only. Its contents do not constitute an offer for sale or advice on the application of any product referred to in it.

ALSTOM T&D Protection & Control Ltd cannot be held responsible for any reliance on any decisions taken on its contents without specific advice.

Publication N 1.1552-A 010102 - Printed in France - Document Systems

A L S T O M T&D Protect ion & Control

Documents

P225