Bay controller PCS-9705

Product overview
PCS-9705 Bay Control Unit (BCU) provides bay-level control and monitoring for electrical substations and integrates with Substation Automation Systems (SAS) using distributed IEDs. It supports protection and control functions for switchgear, including circuit breakers, disconnectors and earthing switches, and offers tap changer control for transformers and shunt reactors.

Measurement & Control

• AC analogue inputs (conventional CT/VT)
• AC digital inputs (electronic CT/VT, IEC 61850-9-2)
• DC analogue input and DC analogue output
• Configurable binary inputs
• Binary outputs (normally open contacts) for switch control and interlocking
• Circuit breaker closing synchronism check

Monitoring

• Switchgear status supervision
• Device power supply monitoring
• VT circuit supervision (VTS)
• CT circuit supervision (CTS)

Circuit Breaker Function

• Auto-reclosing (79)
• Voltage selection for closing synchronism check

Auxiliary Function

• Programmable interlocking logic
• GOOSE tripping via IEC 61850-8-1
• Voltage and current drift auto-regulation
• Sequence of Events (SOE) recorder
• Disturbance & Fault Recorder (DFR) and waveform recorder
• Multiple clock synchronization methods

Communication

• Electrical Ethernet ports supporting IEC 61850 and IEC 60870-5-103 over TCP/IP
• Optical Ethernet ports supporting IEC 61850 and IEC 60870-5-103 over TCP/IP
• GOOSE and Sampled Values (SV) communication
• RS-485 port for clock synchronization
• RS-232/RS-485 for printer connection
• Multiplex RJ-45 port for debugging
• PRP/HSR support for network redundancy

Technical specifications

• Model: PCS-9705 Bay Control Unit
• Primary functions: bay-level control and monitoring of switchgear; tap changer control
• Supported protocols: NR private 103, IEC 61850-8-1, IEC 61850-9-2, IEC 60870-5-103
• GOOSE and Sampled Values (SV) support
• AC analogue and digital inputs, DC analogue I/O, configurable binary I/O
• Circuit breaker synchronism check and auto-reclosing (79)
• Programmable interlocking and GOOSE-based tripping
• SOE, DFR and waveform recording
• Multiple clock sync methods; RS-485 for time sync; RS-232/RS-485 for peripherals
• Electrical and optical Ethernet ports over TCP/IP; PRP/HSR for redundancy