PCS-915ID Distributed Busbar Relay-NR Electric Co. Ltd

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The PCS-915ID distributed busbar protection is used for protecting and monitoring various busbar arrangement with all voltage levels, including single busbar with/without section, double busbar with/without sections, double busbar with transfer bus, breaker-and-a-half arrangement and ring-breaker arrangement. It adopts distributed structure, consisting of one Central Unit (CU) and a number of Bay Units (BUs). The Central Unit is linked to up to 32 Bay Units via optical fibers in point-to- point communication mode. The Central Unit is responsible for the protection calculation and relay management, the Bay Unit acquires and transmits the analog and binary data and executes the trip/close commands issued by Central Unit.
The device provides fast and secure low impedance busbar protection with sub-cycle tripping time. It integrates advanced and patented features to improve its sensitivity and security, such as innovative DPFC current differential protection and unique weighted CT saturation detection method.
The PCS-915ID 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 Monitoring and Metering Communcation User Interfere

Phase current differential protection

Percentage restraint DPFC differential protection

Voltage control element

Detection of CT saturation

Check zone and discrimination zone

Breaker failure protection (50BF)

Dead zone protection (50DZ)

Pole disagreement protection (62PD)

Switch-onto-fault protection (50SOTF)

Overcurrent protection (50/51)

Breaker failure protection (50BF)

Dead zone protection (50DZ)

Pole disagreement protection (62PD)

Overcurrent protection (50/51)

Voltage and current drift auto adjustment

Dynamic busbar replica
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 32 optical point-to-point communication ports from Central Unit to Bay Units
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