PCS-931S Line Differential Relay

Model: PCS-931S

PCS-931S provides full-scheme current differential and distance protection solutions for transmission lines with high-speed sub-cycle distance element.


 

  • PCS-931S provides full-scheme current differential and distance protection solutions for transmission lines with high-speed sub-cycle distance element. As well, the pilot scheme of distance protection and earth fault protection are integrated to provide a complete protection solution for the transmission line.

     

 

  • DPFC current differential protection (87L)
  • Steady-state current differential protection (87L)
  • Neutral current differential protection (87L)
  • Six zone phase-to-phase distance protection (21Q/21M)
  • Six zone phase-to-ground distance protection (21Q/21M)
  • Pilot distance protection (85)
  • Pilot directional earth-fault protection (85)
  • Six stages phase overcurrent protection (67P, 50/51P)
  • Six stages earth-fault protection (67G, 50/51G)
  • Four stages negative-sequence overcurrent protection (67Q, 50/51Q)
  • One stage undercurrent protection (37)
  • Four stages undervoltage protection (27P)
  • Four stages overvoltage protection (59P)
  • Four stages negative-sequence overvoltage protection (59Q)
  • Four stages zero-sequence overvoltage protection (59G)
  • Switch-onto-fault (SOTF) logic Unique power swing blocking releasing logic (PSBR)
  • Auto-reclosing (79) Remote/local control Synchrocheck (25)
  • Voltage and current drift auto adjustment Single-ended impedance-based fault location

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