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PCS-915IC Centralized Busbar Relay
  • The PCS-915IC centralized busbar relay provides comprehensive protection solution for various arrangements of all voltage levels. The default busbar arrangements include single busbar with/without section, double busbar with/without section, double busbar with transfer bus, breaker-and-a-half arrangement and ring-breaker arrangement. The relay provides flexible configuration of the busbar topologies to meet specific applications. Due to its extensive CT input and I/O capability, the PCS-915IC is capable to protect up to 25 feeders.

    It provides fast and secure low impedance busbar protection with sub-cycle tripping time. Check zone and discrimination zone of differential protection are equipped in the relay to minimize the outage zone. Advanced and patented technologies are incorporated to improve sensitivity and security, such as weighted CT saturation detection method, DPFC current differential protection.

    The PCS-915IC 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 easier commissioning and maintenance.

  • Protection and Control Мonitoring and Measurement Сommuncation User Interfere
    • Busbar current differential protection (87B)

    Phase current differential protection

    DPFC differential protection

    Voltage control element

    CT saturation inhibit

    Check zone and discrimination zone

    • Bus coupler/section protection

    Breaker failure protection (50BF)

    Dead zone protection (50DZ)

    Pole disagreement protection (62PD)

    Switch-onto-fault protection (50SOTF)

    Overcurrent protection (50/51)

    • Feeder protection

    Breaker failure protection (50BF)

    Dead zone protection (50DZ)

    Pole disagreement protection (62PD)

    Overcurrent protection (50/51)

    • Voltage and current drift auto adjustment.

    • Frequency tracking.


    • Dynamic busbar replica

    • Isolator contact discrepancy alarm

    • CT failure supervision

    • VT failure supervision

    • Self diagnostic

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

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

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

    • 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 32 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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