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28 NR Electric Co., Ltd.

The PCS-902 relay provides numerical line protection with pilot distance protection, stepped distance protection, current protection, voltage protection, single and/or three pole tripping and auto-reclosing functions. As a full-scheme device, it integrates frequency protection, breaker failure protection and stub protection. The PCS-902 introduces an extensive functional library, programmable logic and configurable I/O, intended for applications on overhead lines and underground cables of all voltage levels, including series compensated lines, double-circuit lines, heavily loaded lines, weak infeed (WI), short lines and extremely long lines. The PCS-902 adopts a wide range of innovative patented technologies, such as DPFC (Deviation Power Frequency Component) distance protection and unique power swing blocking logic, to guarantee its accurate and reliable operation.

ApplicationOptionally, the PCS-902 incorporates two sets of CT input for dual-breaker application. The dual-breaker failure protection, dual-breaker auto-reclosing and stub protection are integrated for one-and-a-half breaker and ring breaker application. To enhance accuracy of data sampling, frequency-tracking function is used to trace the real-time current/voltage value. The PCS-902 adopts the advanced UAPC multi-processor platform which is fully complied with IEC 61850 station bus & GOOSE process bus and supports both traditional electro-magnetic CT/VT and electronic CT/VT.

Functions

Protection and ControlPilot directional distance protection. (85)•

Independent distance zone with PUTT, POTT, blocking and DTT (Direct Transfer Tripping).

Pilot zero sequence directional comparison protection. • (DEF)

The relay includes zero sequence directional overcurrent elements for earth fault.

DPFC distance protection. (21D)• Innovative Deviation of Power Frequency Component distance protection can quickly clear faults and is immune to the load current, weak-infeed and power swing.

Four zones of full-scheme phase-to-phase distance • protection. (21P)

Four zones of phase-to-phase distance protection integrates the memorized positive sequence voltage polarization, reactance characteristic, direction characteristic, load blinder and unique low-voltage distance element. The fourth zone can be set as the reversal directional protection.

Four zones of full-scheme phase-to-ground distance • protection. (21G)

Four zones of phase-to-ground distance protection integrates the memorized positive sequence voltage polarization, reactance characteristic, direction characteristic, load blinder and unique low-voltage distance element. The fourth zone can be set as the reversal directional protection.

Four stages of directional phase overcurrent protection. • (67P, 50/51P)

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PCS-902 Line Distance Relay


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29NR Electric Co., Ltd.

Overcurrent protection can be supervised by voltage element and directional element. IDMT curves complied with IEC and ANSI standard are present for selection.

Four stages of directional zero sequence overcurrent • protection. (67N, 50/51N)

Overcurrent protection can be supervised by voltage element and directional element. IDMT curves complied with IEC and ANSI standard are present for selection.

Breaker failure protection for one or two breakers (50BF)• Breaker failure protection can be applied to one breaker and two breakers applications.

Two stages of under voltage protection and two stages of • over voltage protection (27/59)

Under/over phase voltage protection and under/over voltage protection are provided. (positive sequence, negative sequence or zero sequence)

Four stages of frequency protection (81)• Frequency is calculated reference to the positive sequence voltage. The protection can be supervised by the df/dt element and the undervoltage element.

Stub protection for T-Zone in a 3/2 breaker application (50S)• Stub protection is introduced to protect T-zone in a one-and-a-half breaker scheme or a ring breaker scheme.

Time overcurrent protection during VT failure. (51P VT)• Time overcurrent protection will be enabled if the phase-to-phase distance protection is blocked by VT failure.

Time zero sequence overcurrent protection during VT failure. • (51N VT)

Time zero sequence overcurrent protection will be enabled if the phase-to-ground distance protection is blocked by VT failure.

Switch-onto-fault (SOTF) logic.• Switch-onto-fault logic is used to clear fault during manually-closing and auto-reclosing.

Unique power swing blocking logic. (68)• The power swing blocking logic can prevent mal-operation during external fault in power swing and clear the internal fault quickly in power swing.

Thermal overload protection. (49)• The output of thermal overload protection can be set to tripping or alarm.

Pole discrepancy detection element. • Pole discrepancy detection element is used to protect discrepancy between the pole positions of breaker with independent gears.

Synchronism check. (25)• Synchronism check and dead bus or dead line check are both provided for auto-reclosing.

Auto-reclosing (single and/or three-pole for one or two • breakers). (79)

The optional single/three pole auto-reclosing is applicable to one or two breakers. Priority logic is integrated for use on one-and-a-half breaker application and ring breaker application.

Voltage and current drift auto adjustment.• The relay continually and automatically traces the voltage and current drifts and adjusts the zero point to the normal value.

Frequency tracking.• Frequency tracking is provided to accommodate the frequency shift in power system.

Monitoring and MeteringCT failure supervision.• VT failure supervision.• Line voltage failure supervision.• Tripping/Closing circuit supervision.• Self diagnostic test.• Fault Recorder.• Fault Locator.• Total 1024 SOE, including tripping, alarm, binary input change • and human operation reports.User-configurable high resolution oscillography of last 24 • oscillograms. (Compatible with COMTRADE format)

CommunicationsPilot communication schemes (PUTT, POTT, WI) with fiber, • carrier or other channels.2 Ethernet ports with IEC 61850 for station bus• 2 optional GOOSE communication for process bus• 2 RS-485 communication rear ports with IEC 60870-5-• 103 protocol1 RS-485 communication rear ports for clock synchronization• 1 RS-232 communication rear ports for printer• 1 • faceplateRJ45 Ethernet port for testing and settingGPS clock synchronization.•

FeaturesThe typical pickup time is 10 ms for a close-in fault, 15 ms for • a fault in the middle of a line, 25 ms for a remote fault.

The relay is based on NR’s well established and proven • UAPC hardware platform with multi-processor architecture. The multi CPU technology supports parallel operating simultaneously.

The binary input can be used to initiate the power line carrier • transceiver and the optical fiber is optional instead of carriers to realize the pilot scheme.

The sensitive DPFC distance protection is integrated to target • on the quick clearance of internal fault without being affected by power swing.

Each zone of phase-ground distance protection is provided • with independent zero-sequence compensation and mutual zero-sequence compensation.

The patented adaptive floating threshold is insensitive to • system imbalance and disturbance. The measuring element can achieve high security and high speed simultaneously.

The unique built-in power swing blocking logic can properly • supervise the distance protection during a power swing. The power swing blocking logic can prevent mal-operation for an external fault and quickly clear the internal fault during a power swing.

Single and/or three pole auto-reclosing with synchro-check • and dead line/bus check are provided for multi-breaker configuration. The priority logic of multi-breaker auto-reclosing is integrated.

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The relay is insensitive to the power source change and can • be applied to the weak infeed condition.

Instantaneous, definite time and inverse time (IDMT) • characteristics are available in phase overcurrent protection and the zero sequence overcurrent protection which can be controlled by directional protection and/or under voltage protection through logic setting.

Independent distance protection is designed for pilot scheme • to realize PUTT, POTT, Blocking and DTT application. Additional three zones of forward distance protection and one zone of reverse distance protection are provided.

Users can select either Mho or quadrangle with Mho • characteristics for distance protection. The load blinder function is also integrated.

The independent phase selection element can select the • faulty phase and make a phase trip correctly, even for a high resistance fault.

The two independent data acquisition paths can prevent any • undesired trip caused by component failure. One works as a fault detector and the other is designed for protection and its logic. Tripping outputs are supervised by the fault detector to prevent a mal-operation.

The connector type is optional, one is the plug in/out terminal • connector and the other is the screw terminal connector. The unique plug in/out terminal connectors are used to connect the rear panel to the terminal blocks on the rack or cabinet, making on-site commissioning and replacement much easier than using traditional screw terminals.

The relay provides GPS clock synchronization, including SNTP, • binary input, and IRIG-B synchronization.

The relay is compatible with multiple protocols- IEC61850 and • IEC 60870-5-103 for station level, GOOSE and IEC61850-9-2 for process level. It supports communication interfaces such as, RS485 and Ethernet.

Technical dataPower SupplyStandard IEC 60255-11:1979

Rated Voltage (Un) 88Vdc ~ 264Vdc

Variation (80% ~ 120%)Un

Ripple Max 15% of rated voltageVoltage dips Voltage dips 60% of Un for 10 seconds without resetvoltage short interruptions 100ms without de-energizingVoltage Variation Immunity Normal operation under ± 20% voltage variation

BurdenContineously < 20 Wfor 10s < 25 W

Reverse biased DC supply Normal operation for 1 min

AC Current InputsStandard IEC 60255-27Rated frequency 50Hz ± 5Hz, 60Hz ± 5HzPhase rotation ABCRated Current (In) 1A/5A Linear to 0.05In ~ 40In

Thermal withstand capability

continuous 4×In

for 10s 30×In

for 1s 100×In

for half a cycle 250×In

Burden <0.2VA/phase < 0.25VA/phaseSetting precision 0.5% ± 0.01In

Measurement precision 0.2

AC Voltage Inputs:Standard Per IEC 60255-6:1998 Rated Voltage (Un) 100V/110Vlinear to 0.01Un ~ 1.7Un

Thermal withstand capabilitycontinuously 2.0Un

10s 2.6Un

1s 3.0Un

Burden <0.25 VA/phaseSetting precision 0.5% ± 0.001Un

Measurement precision 0.2

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Binary Inputs:Rated voltage 24V 48V 110VDC 125VDC 220VDC 250VDC Rated current 1.1mA 2.2mA 1.1mA 1.1mA 2.2mA 2.2mAPickup voltage 70%Un

Dropout voltage 55%Un

Maximum permitted voltage 120%Un Withstand 2000Vac 3000VdcResolving time for logic input 500μmGOOSE binary input precision <1ms

Binary Outputs:Standard IEC 60255-1

Output model

potential free tripping contactpotential free signal contactpotential heavy current contactGOOSE contact

Max. system voltageTripping contact Signal contact Heavy current contact

250V AC30V DC

380V AC250V DC

250V AC250V DC

Test voltage across open contact 1000V RMS1min

1200V RMS1min

250V RMScontinuous

Continuous carry 8A @ 250V AC5A @ 30V DC 8A 18A

Short duration current 30A for 0.5s 35A for 0.5s 50A for 0.5sBreaking capacity (R/L=40ms) 0.05A 0.2A 5AMaking capacity at L/R=40ms 2000VA 3040VA 5540VAPickup time(Typ/Max) <5ms <10ms <300usGOOSE binary output precision <1ms

Mechanical Specifications:Enclosure dimensions (W×H×D) 482.6×177×291 (unit: mm)Trepanning dimensions (W×H) 450×179, M6 screwMounting Way Flush mountedWeight per device Approx. 20kgLocal control panel Small control module: 6 LED indicators, a 9-key keypad and a 160×80-dot LCD Display language Chinese, English, Russian (Optional), French (Optional)Housing material AluminumHousing color Silver greyLocation of terminals Rear panel of the device

Protection class (per IEC60529:2001)Front side: IP40, IP52 with additional cover Rear side, connection terminals: IP20 Other Sides: IP30

Atmospheric Environment:Standard IEC60255-6:1988Service temperature range -40°C ~ +70°CTransport and storage temperature range -40°C ~ +70°CPermissible humidity 5% ~ 95%, condensation not permissible Permissible altitude <3000m

Communication Interfaces:Type Items Plastic optical fiber Glass optical fiber

OpticalTerminals BFOC/2.5(OR F-SMA) BFOC/2.5(OR F-SMA)Cable Step-index 980/1000 um Graded-index 62.5/125 umTypical transmission distance Up to 40m Up to 1000m

Optical

Optical wavelength 660nm 820nm~860nmOperating temperature -5°C ~ +55°C -5°C ~ +55°CTransmission power Min. -7dBm Min. -16dBmMin. receiving power Min. -20dBm Min. -24dBmSystem storage Min +3dB Min +3dB

Electrical

Interfaces for communicating with RTU/SCADA

RS-485 (EIA)

Port number 2Baud rate 4900 ~ 19200bpsTransmission distance < 500mMaximal capacity 32 Twisted Pair Screened twisted pair cableProtocol IEC60870-5-103:1997Safety level Isolation to ELV level

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Electrical

Ethernet

Port number 4Connector type RJ-45Transmission standard 100Base-TXProtocol IEC60870-5-103:1997 or IEC61850Safety level Isolation to ELV level

IRIG-B Interface

RS-485Communication type AC, DCInterface BNCConnection Coaxial cable

Rear interface for local HMI

RS-232 (EIA)

Port number 1

Application Local human-machine communication Download program of protection relay

Baud rate 9600bpsConnector type 9 pin D-type female connectorSafety level Isolation to ELV leve

Interfaces for communicating with a printer

RS-232 (EIA)

Port number 1Baud rate 4800 ~ 9600bpsPrinter type EPSON® LQ-300KSafety type Isolation to ELV level

Interfaces for clock synchronization

RS-485 (EIA)

Port number 1Maximal capacity 32Timing standard PPS, IRIG-BSafety level Isolation to ELV level

Type testElectromagnetic compatibility (EMC)

1MHz burst disturbance tests- Common mode- Differential mode

IEC60255-22-1:1988, Class III 2.5kV1.0kV

Electrostatic discharge tests-For contact discharge-For air discharge

IEC60255-22-2 :1996 (idt IEC 61000-4-2) Class IV±8.0kV±15.0kV

Radio frequency interference testsFrequency sweep

-Radiated amplitude-modulatedSpot frequency

-Radiated pulse-modulated-Radiated amplitude-modulated

IEC60255-22-3:2000 class III

10V/m(rms), f=80…1000MHz

10Vm(rms), f=80MHz/160MHz/380MHz/450MHz/900MHz/1850MHz/2150MHz10Vm(rms), f=900MHz

Fast transient disturbance tests- Power supply, I/O & Earth terminals- Communication terminals

IEC60255-22-4:2002 (idt IEC 61000-4-4)Class IV, 4kV, 2.5kHz, 5/50nsClass IV, 2kV, 5.0kHz, 5/50ns

Surge immunity testsPower supply, AC inputs, I/O terminals- Common mode- Differential mode

IEC60255-22-5:2002 (idt IEC 61000-4-5:1995) , Class IVSurge: 1.2/50us 4kV2kV

Conducted RF electromagnetic disturbance- Power supply, AC, I/O, Comm. terminal

IEC60255-22-6:2001, Class III10V(rms), 150kHz~80MHz

Power frequency magnetic field immunityIEC61000-4-8:1993, Class V100A/m continuous1000A/m for 1-3s

Pulse magnetic field immunityIEC61000-4-9:1993, Class V6.4/16 us1000A/m for 3s

Damped oscillatory magnetic field immunity IEC61000-4-10:1993, Class V100kHz & 1MHz – 100A/m

Conducted emission testsIEC 60255-25 Level AFrequency: 0.15-0.5Mhz, Peak Value: 79dbuV, Mean Value: 66dbuV; Frequency: 0.5-30Mhz, Peak Value: 73dbuV, Mean Value:60dbuV;

Radiated emission testsIEC 60255-25 Level AFrequency: 30-230Mhz Peak Value: 40dbuV/m; Frequency: 230-1000Mhz Peak Value: 47dbuV/m;

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Shockwave immunity testsRing wave

- Common mode- Differential mode

Damped oscillatory wave- Common mode- Differential mode

IEC 61000-4-12:1995

1MHz 2.0kV1MHz 1.0kV

1MHz 2.5kV1MHz 1.0kV

Voltage dips, short interruptions and voltage variations on d.cVoltage dips on d.c power supply

-220V-110V

IEC 61000-4-2940%Un >200ms40%Un >200ms

Voltage interruptions on d.c power supply-220V-110V

IEC 61000-4-29100ms30ms

Voltage ripple immunity tests IEC 61000-4-17:2002 ClassIVAuxiliary energizing quantity of measuring relays IEC 60255-11

Mechanical testsVibration IEC60255-21-1:1988, Class I Shock and bump IEC60255-21-2:1988, Class I

Electrical testsDielectric tests IEC60255-5:2000, test voltage: 2kV, 50Hz, 1min

Impulse voltage tests IEC60255-5:2000, test voltage: 5kV, unipolar impulses, waveform 1.2/50μs, source energy 0.5J

Insulation measurement IEC60255-5:2000, insulation resistance >100MΩ, 500Vdc

Environmental testsDry heat test IEC60068-2-2:1974, Test Bd for 16 h at +55°C Dry cold test IEC60068-2-1:1990, Test Ad for 16 h at -25°C

Damp heat test, cyclic IEC60068-2-30:1980, Test Db for two (12+12 hours) cycles, 95%RH, low temperature +25°C, high temperature +55°C

Dimensions

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20101125173541893