PCS-902 Line Distance Protection-NR Electric Co. Ltd

SERVICES NEWS EVENT CALENDOR CONTACT US: PCS-902 Line Distance Protection

The PCS-902 provides comprehensive protection and control solutions for transmission lines with high-speed sub-cycle distance element. The PCS-902 is intended for application on overhead lines and underground cables with diverse voltage levels. These include series compensated, double- circuit, heavily loaded, weak in feed (WI), short and long lines. It can meet the requirements of single-pole or three- pole tripping; it also provides single and/or three-pole auto- reclosing functions. The PCS-902 is suitable for single and dual- breaker applications, providing optional dual CT inputs, dual breaker failure protections, dual breaker auto-reclosing and dual synchro-checks. Additionally, the relay integrates the remote/ local control of circuit breaker, disconnector and earth switch.
The PCS-902 employs a wide range of innovative patented technologies, such as DPFC (Deviation Power Frequency Component) distance protection and unique power swing blocking logic. Thus, guaranteeing accurate and reliable operations.
The PCS-902 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 smoother commissioning and maintenance.

Protection and Control Monitoring and Measurement Communication User Interface

Five zone phase-to-phase distance protection (21P)
One zone phase-to-phase distance protection for pilot scheme (85)
Five zone phase-to-ground distance protection (21G)
One zone phase-to-ground distance protection for pilot scheme (85)
High-speed DPFC distance protection (21D)
Pilot directional earth-fault protection (85)
Four stage phase overcurrent protection (50/51P)
Four stage neutral overcurrent protection (50/51G)
Three stages negative-sequence overcurrent protection (50/51Q)
Breaker failure protection for one or two breakers (50BF)
Stub overcurrent protection (87STB)
Three stage undervoltage protection and three stage overvoltage protection (27/59)
Four stage underfrequency protection and four stage overfrequency protection (81)
One stage negative-sequence overvoltage protection (59Q)
Phase overcurrent protection during VT failure (50P VT)
Neutral overcurrent protection during VT failure (50G VT)
Switch-onto-fault (SOTF) logic
Unique power swing blocking releasing logic (PSBR)
Out-of-step protection (78)
Broken conductor protection (46BC)
Dead zone protection (50DZ)
Thermal overload protection (49)
Pole discrepancy protection (62PD)
Reverse power protection (32R)
Single and/or three-pole auto-reclosing (single-breaker or dual-breaker ). (79)
Remote/local control
Synchronism check (25)
Voltage and current drift auto adjustment.
Frequency tracking.

Energy measurement (active and reactive energies for import and export)
CT failure supervision
VT failure supervision
Fault phase selection
Fault Locator with parallel-line compensation
Self diagnostic
Event recorder including 1024 change-of-binary-input events, 1024 supervision events, 256 control logs and 1024 device logs
Disturbance recorder including 32 disturbance records with waveforms (The format is compatible with COMTRADE.)
Pilot communication channel supervision
System frequency supervision
Clock synchronization using IRIG-B, SNTP, PPS (Pulse-Per- Second) and PPM (Pulse-Per-Minute), IEEE 1588

Optional single- or dual- pilot channels (fiber optic), complying with G.703 and C37.94
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 six optical Ethernet ports using IEC 61850-9-2 and IEC 61850-8-1 GOOSE