Over-frequency protection relay PCS-915SC

over-currentunder-frequencytrip circuit

Product Overview
PCS-915SC centralized busbar relay integrates busbar differential protection, bus coupler/section protection (overcurrent protection, switch-onto-fault protection, dead zone fault protection, dual CT BC/BS dead zone differential protection and breaker failure protection), feeder protection (overcurrent, dead-zone fault and breaker failure), voltage protection (phase overvoltage and undervoltage) and frequency protection (overfrequency, underfrequency, rate-of-change). Compatible with PCS-Studio configuration tool, PCS-915SC provides scalable centralized busbar protection with investment security and efficient operation.

Protection Functions

• Busbar Differential Protection (87B)
• BC/BS Dead Zone Fault Protection (50DZ)
• BC/BS Dead Zone Differential Protection (87DZ)
• Feeder Dead Zone Fault Protection (50DZ)
• BC/BS Switch-onto-fault (SOTF) Protection (50SOTF)
• Breaker Failure Protection (50BF)
• Phase Overcurrent Protection (50/51P)
• Earth Fault Overcurrent Protection (50/51G)
• Phase Overvoltage Protection (59P)
• Phase Undervoltage Protection (27P)
• Overfrequency Protection (81O)
• Underfrequency Protection (81U)
• Frequency Rate-of-change Protection (81R)
• External Binary Input Trip Busbar

Measurement and Recording Functions

• Phase angle measurement
• Differential current calculation
• Sequence component calculation
• Event recorder: 1024 disturbance records, 1024 binary events, 1024 supervision events, 256 control logs, 1024 device logs
• Disturbance recorder: 32 records with waveforms, COMTRADE compatible

Supervision Functions

• Self-diagnostic
• Frequency supervision
• DC power supply supervision
• CT circuit supervision
• VT circuit supervision
• Disconnector supervision

Communication

• 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 four 100Base-FX optical Ethernet ports using IEC 61850, DNP3.0 or IEC 60870-5-103 over TCP/IP
• Two RS-485 serial ports using IEC 60870-5-103 or Modbus
• One RS-485 serial port for clock synchronization
• One BNC port for clock synchronization
• Support for GOOSE communication module using IEC 61850-8-1 GOOSE
• Full compatibility between IEC 61850 Editions 1 and 2
• Redundancy protocols PRP and HSR
• One front RJ-45 port and one rear RJ-45 port for debugging

Technical specifications

• Model: PCS-915SC
• Protection functions: 87B, 50DZ, 87DZ, 50SOTF, 50BF, 50/51P, 50/51G, 59P, 27P, 81O, 81U, 81R
• Event recorder capacity: 1024 disturbance records; 1024 binary events; 1024 supervision events; 256 control logs; 1024 device logs
• Disturbance recorder: 32 records with waveforms, COMTRADE compatible
• Ethernet: up to 4x 10/100Base-TX (copper) and up to 4x 100Base-FX (optical)
• Serial ports: at least two RS-485 for protocols and one RS-485 for clock sync
• Clock sync: RS-485 and BNC options
• Supported protocols: IEC 61850 (Editions 1 & 2), DNP3.0, IEC 60870-5-103, Modbus
• GOOSE support: IEC 61850-8-1
• Redundancy: PRP and HSR
• Configuration tool: PCS-Studio compatible