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PCS-9705S Bay Control Unit
  • The PCS-9705S Bay Control Unit (BCU) is a general-purpose control, protection and automation device in all substations, power plants and industrial domain applications. The modular conception permits the hardware adaption exact to client requirements.

    The PCS-9705S is applicable not only to conventional substations but also to digital substations. It supports IEC 61850 edition 1.0 and 2.0 standard for modelling of various signals and provides MMS/GOOSE/SV network interfaces for independent or hybrid network in real-time. The process layer supports peer-to-peer (P2P) mode and networking mode, including single network mode and dual network mode. The station layer could receive and send MMS messages, such as interlocking signals, or GOOSE messages, such as switch positions and tripping signals.

  • Protection Functions Control Functions Measurement and Metering Monitoring Communication
    • Six stages phase overcurrent protection (50/51P)

    • Six stages earth-fault protection (50/51G)

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

    • Undercurrent protection (37)

    • Two stages phase overvoltage protection (59P)

    • Positive-sequence overvoltage protection (59Pos)

    • Two stages negative-sequence overvoltage protection (59Q)

    • Two stages residual overvoltage protection (59G)

    • Two stages phase undervoltage protection (27P)

    • Six stages overfrequency protection (81O)

    • Six stages underfrequency protection (81U)

    • Six stages rate-of-change of frequency protection (81R)

    • Two stages reverse power protection (32R)

    • Breaker failure protection (50BF)

    • Transfer trip (TT)

    • Auto-reclosing (79)

    • Switchgear control

    • Double point status synthesis

    • Remote/Local control mode switch

    • Interlocking logic for control

    • Direct control

    • Closing synchronism check with voltage selection

    • Switchgear trip counter

    • Tap position indicator and control

    • Automatic voltage regulation (90V)

    • Parallel voltage regulation (PVR)

    • U, I, P, Q, Cos

    • Positive, negative and zero sequences

    • Max.15th harmonics

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

    • Power Quality Supervision (PQS) with Total Harmonic Distortion (THD), deviation and unbalance

    • DC analogue inputs (0~±20mA or 0~±10V)

    • DC analogue outputs (4~20mA, 0~10V, 0~5V or 0~20mA)

    • CT circuit failure Supervision (CTS)

    • VT circuit failure Supervision (VTS)

    • Self diagnostic

    • Powerful faults recording (max. buffer for 10,000 sampled points at 4.8 or 9.6 kHz)

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

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

    • Single line diagram representation in display

    • Support of various protocols

    Ø  Modbus

    Ø  DNP3

    Ø  IEC 60870-5-103

    Ø  IEC 61850 Ed1 & Ed2

    Ø  IEC 62439 Parallel Redundancy Protocol (PRP)

    Ø  IEC 62439 High-availability Seamless Ring (HSR) Redundancy Protocol

    Ø  IEEE 802.1w Rapid Spanning Tree Protocol (RSTP)

    • Support for digital substation

    Ø  Extendable quantity of communication interfaces

    Ø  Support of IEC 61850 MMS Server

    Ø  Support of IEC 61850-8-1 GOOSE

    Ø  Support of IEC 61850-9-2LE SV

    • Up to four 10Base-T/100Base-TX copper Ethernet ports

    • Up to four 100Base-FX optical Ethernet ports

    • Two RS-485 serial ports for communication or printer

    • One RS-485/TTL serial port for clock synchronization

    • One BNC connector for clock synchronization

    • RJ45 debugging ports for both front and rear sides

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