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  • PCS-9641 Motor Relay

  • The PCS-9641 relay is a protection, control and monitoring unit for various kinds of motors on solidly grounded, impedance grounded, Peterson coil grounded and ungrounded system.

    The PCS-9641 features high performance functional library, programmable logic, configurable I/O and integrated frequencytracking. This relay is designed based on advanced multiprocessor platform, fully complying with IEC 61850 station bus & process bus, supporting IEC 61850-8-1 MMS and GOOSE.

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Protection and Control
  • Current differential protection. (87M)
  • Overcurrent protection. (67P, 50P/51P)
  • Neutral/ground overcurrent protection. (67G, 50/51G)
  • Sensitive earth fault protection. (67SG/51SG)
  • Negative sequence overcurrent protection. (46)
  • Broken conductor detection. (46BC)
  • Breaker failure protection. (50BF)
  • Undercurrent protection. (37)
  • Undervoltage protection and Over voltage protection. (27/59)
  • Zero sequence overvoltage protection. (59G)
  • Negative sequence overvoltage protection. (47)
  • Thermal overload element. (49)
  • RTD temperature protection. (RTD)
  • Under-frequency protection, overfrequency protection and rate-of-change of frequency (81U/O/R)
  • Reverse power protection. (32R)
  • Under power protection. (37P)
  • Power factor protection (Out-of-step protection). (55)
  • Restart inhibit for starts per time interval. (66)
  • Starting-time supervision. (48)
    The motor startup-time supervision function protects against excessive starting time and locked rotor conditions of motors during startup.
  • Remote and local tripping/closing of breaker.
    The breaker tripping/closing can be implemented remotely or locally.
  • Voltage and current drift auto adjustment.
  • Frequency tracking.
    Monitoring and Metering
    • Metering of current, voltage, active power, reactive power, power factor, energy, frequency,.
    • Circuit breaker monitoring.
    • CT failure supervision.
    • VT failure supervision.
    • Tripping circuit supervision.
    • Self diagnostic.
    • Fault Recorder: 64 fault and disturbance records, and 8 motor startup wave records.
    • Total 1024 SOE, including tripping, alarm, binary input change and human operation reports.
    • 8 motor startup reports, 64 protection operation reports, 1024 supervision alarm records, 1024 control operation records, 1024 user operation records.
    • Complete event recording function
      64 faults and operation sequences, 64 fault waveforms, results of 256 self-supervision reports, and 1024 binary signal change reports can be recorded.

    • Up to four 10Base-T/100Base-TX (RJ45) ports or two 100Base-FX ports with IEC 61850-8-1 MMS and GOOSE for non-time-critical message, IEC 60870-5-103 over TCP/IP or DNP 3.0
    • Two RS-485 rear ports with IEC 60870-5-103, MODBUS
    • Up to Six 100Base-FX ports with IEC 61850-9-2 Sampling Value and GOOSE for time-critical message
    • One RS-485 rear port for clock synchronization
    • One RS-232 rear port for printer
    • 1 faceplate RJ45 port for testing and setting
    • Clock synchronization via pulse, IRIG-B and SNTP
  • Modularized hardware design enables an easy upgrade and repairs. Various optional function modules can satisfy various situations according to the different requirements of users.
  • This device can sample the analog values from the conventional CT/VT, or receive the sampled values from electronic CT/VT via the merging unit.
  • Overcurrent protection can be controlled by directional protection, and voltage control element.
  • The relay provides optional RTD input module and DC mA input module for temperature detection.
  • This device has powerful GOOSE functions, and the connection and cooperation between some devices can be realized without using electrical cables, to facilitate such functions as simple bus differential protection, overload interlock shedding function and backup automatic transfer function etc.
  • This device has fully realized the technology to integrate six functions into one device: protection, measurement, control, remote signaling, merging unit function and remote module functions, to improve the reliability.
  • This device can communicate with a SAS or RTU via different communication intermediates: Ethernet network, RS-485 serial ports. The communication protocol of this device is optional: IEC61850, IEC60870-5-103, DNP3.0 or MODBUS.
  • This relay can detect the tripping circuit of the circuit breaker and monitor the operation (close or trip) time of a circuit breaker by checking the auxiliary contacts of the circuit breaker.
  • Powerful fault and disturbance recording function is supported: 8 latest motor startup wave records, 64 latest fault or disturbance waves, the duration of a wave recording is configurable.
  • Various methods of GPS time synchronization are supported in this relay, including SNTP, pulse per second (PPS) and IRIG-B synchronization.