Over-voltage protection relay PCS-9641

under-voltageoverloadover-current

The PCS-9641 relay is a protection, control and monitoring unit for various kinds of motors on solidly grounded, impedance grounded, Peterson coil grounded and ungrounded system. The PCS-9641 features high performance functional library, programmable logic, configurable I/O and integrated frequencytracking. This relay is designed based on advanced multiprocessor platform, fully complying with IEC 61850 station bus & process bus, supporting IEC 61850-8-1 MMS and GOOSE. • Current differential protection. (87M) • Overcurrent protection. (67P, 50P/51P) • Neutral/ground overcurrent protection. (67G, 50/51G) • Sensitive earth fault protection. (67SG/51SG) • Negative sequence overcurrent protection. (46) • Broken conductor detection. (46BC) • Breaker failure protection. (50BF) • Undercurrent protection. (37) • Undervoltage protection and Over voltage protection. (27/59) • Zero sequence overvoltage protection. (59G) • Negative sequence overvoltage protection. (47) • Thermal overload element. (49) • RTD temperature protection. (RTD) • Under-frequency protection, overfrequency protection and rate-of-change of frequency (81U/O/R) • Reverse power protection. (32R) • Under power protection. (37P) • Power factor protection (Out-of-step protection). (55) • Restart inhibit for starts per time interval. (66) • Starting-time supervision. (48) • The motor startup-time supervision function protects against excessive starting time and locked rotor conditions of motors during startup. • Remote and local tripping/closing of breaker. • The breaker tripping/closing can be implemented remotely or locally. • Voltage and current drift auto adjustment. • Frequency tracking.