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PCS-902 Line Distance Protection
  • The PCS-902 provides comprehensive protection and control solutions for transmission lines with high-speed sub-cycle distance element. The PCS-902 is intended for application on overhead lines and underground cables with diverse voltage levels. These include series compensated, double- circuit, heavily loaded, weak in feed (WI), short and long lines. It can meet the requirements of single-pole or three- pole tripping; it also provides single and/or three-pole auto- reclosing functions. The PCS-902 is suitable for single and dual- breaker applications, providing optional dual CT inputs, dual breaker failure protections, dual breaker auto-reclosing and dual synchro-checks. Additionally, the relay integrates the remote/ local control of circuit breaker, disconnector and earth switch. 
    The PCS-902 employs a wide range of innovative patented technologies, such as DPFC (Deviation Power Frequency Component) distance protection and unique power swing blocking logic. Thus, guaranteeing accurate and reliable operations. 
    The PCS-902 is compatible with IEC 61850 station bus and process bus applications. It supports IEC 61850-8-1 MMS, GOOSE and IEC 61850-9-2 Sampling Value. The RJ-45 faceplate port is provided for testing and setting, allowing for smoother commissioning and maintenance.

  • Protection and Control Monitoring and Measurement Communication User Interface
    • Five zone phase-to-phase distance protection (21P)

    • One zone phase-to-phase distance protection for pilot scheme (85)

    • Five zone phase-to-ground distance protection (21G)

    • One zone phase-to-ground distance protection for pilot scheme (85)

    • High-speed DPFC distance protection (21D)

    • Pilot directional earth-fault protection (85)

    • Four stage phase overcurrent protection (50/51P)

    • Four stage neutral overcurrent protection (50/51G)

    • Three stages negative-sequence overcurrent protection (50/51Q)

    • Breaker failure protection for one or two breakers (50BF)

    • Stub overcurrent protection (87STB)

    • Three stage undervoltage protection and three stage overvoltage protection (27/59)

    • Four stage underfrequency protection and four stage overfrequency protection (81)

    • One stage negative-sequence overvoltage protection (59Q)

    • Phase overcurrent protection during VT failure (50P VT)

    • Neutral overcurrent protection during VT failure (50G VT)

    • Switch-onto-fault (SOTF) logic

    • Unique power swing blocking releasing logic (PSBR)

    • Out-of-step protection (78)

    • Broken conductor protection (46BC)

    • Dead zone protection (50DZ)

    • Thermal overload protection (49)

    • Pole discrepancy protection (62PD)

    • Reverse power protection (32R)

    • Single and/or three-pole auto-reclosing (single-breaker or dual-breaker ). (79)

    • Remote/local control

    • Synchronism check (25)

    • Voltage and current drift auto adjustment.

    • Frequency tracking.

    • Energy measurement (active and reactive energies for import and export)

    • CT failure supervision

    • VT failure supervision

    • Fault phase selection

    • Fault Locator with parallel-line compensation

    • Self diagnostic

    • Event recorder including 1024 change-of-binary-input events, 1024 supervision events, 256 control logs and 1024 device logs

    • Disturbance recorder including 32 disturbance records with waveforms (The format is compatible with COMTRADE.)

    • Pilot communication channel supervision

    • System frequency supervision

    • Clock synchronization using IRIG-B, SNTP, PPS (Pulse-Per- Second) and PPM (Pulse-Per-Minute), IEEE 1588

    • Optional single- or dual- pilot channels (fiber optic), complying with G.703 and C37.94

    • Up to four 10Base-T/100Base-TX copper Ethernet ports using IEC 61850, DNP3.0 or IEC 60870-5-103 over TCP/IP

    • Up to two 100Base-FX optical Ethernet ports using IEC 61850, DNP3.0 or IEC 60870-5-103 over TCP/IP ( Sharing two copper Ethernet ports)

    • Two RS-485 serial ports using IEC 60870-5-103

    • One RS-485 serial port for clock synchronization

    • Optional Sampling value and GOOSE communication module with six optical Ethernet ports using IEC 61850-9-2 and IEC 61850-8-1 GOOSE

    • HMI interface with large-size LCD and 9-button keypad on the front panel

    • One front RJ-45 port for testing and setting

    • One RS-232 or RS-485 rear port for printer

    • Language selection – English + selected language

    • Assistant software - PCS-Explorer

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