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PCS-985GI Generator Relay
PCS-985GI is a high performance numerical generator protection device, which integrates main and backup protection into one device. It provides complete protection of a generator in power plant, and it also provides basic protection of a generator and an excitation transformer. PCS-985GI can be applied for turbo-dynamo generator, gas-turbine generator, hydro generator and nuclear power generator with different connection modes.
PCS-985GI provides up to 56 analog input channels including current and voltage inputs. The generator protections are configurable. Ancillary functions of fault diagnostic, disturbance records, event records and communication function are integrated in the device.
- Miscellaneous Excitation Transformer Protection Generator Protection
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Fault detector (FR)
Voltage and current drift auto adjustment
VT circuit supervision (VTS)
CT circuit supervision (CTS)
CT saturation detection (CTS)
Self diagnostic
GPS clock synchronization
Fault recorder
IEC61850 MMS & GOOSE for station bus
IEC60870-5-103 protocol
MODBUS protocol
DNP 3.0 protocol
Differential protection (87ET)
Overcurrent protection (50/51P)
Current differential protection (87G)
Incomplete current differential protection (87IG)
Phase segregated transverse differential protection (87STG)
Neutral point transverse differential protection (87NTG)
VGenerator inter-turn protection (59NIT)
Stator overload protection (49S)
Fundamental zero-sequence voltage stator ground fault protection (64S1)
Zero-sequence overcurrent protection stator ground fault protection (64S)
Generator 3rd harmonic stator ground fault protection (64S2)
Generator stator ground fault protection with 20Hz voltage injection (64SInj)
Generator Ping-Pang type rotor ground fault protection (64R)
Rotor ground fault protection with low-frequency squarewave voltage injection (64RInj)
Generator rotor winding overload protection (49E)
Generator inadvertent energization protection (50/27)
Generator out-of-step protection (78)
Generator startup and shutdown protection (StShut)
Generator shaft overcurrent protection (51GS)
Negative-sequence Overload protection (46G)
Generator reverse power protection (32R)
Generator low forward power protection (32F)
Overexcitation protection (24)
Loss of excitation protection (40G)
Generator phase overcurrent protection (50/51P)
Phase overvoltage protection (59P)
Undervoltage protection (27P)
Overfrequency protection (81O)
Underfrequency protection (81U)
Impedance protection (21)
Breaker failure protection (50BF)
Mechanical protection (MR)
Voltage balance protection (60)