PCS-902 Line Distance Protection

Model: PCS-902

The PCS-902 provides comprehensive protection and control solutions for transmission lines with high-speed sub-cycle distance element.


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

  • 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 Assista

 

 

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