Synchronous Machine Protection Control & Monitoring System
Generator Protection System
The multifunction protective system with integrated instrumentation, control and communications
features for generation. The system provides voltage controlled, voltage restrained and standard three
phase over current protection, as well as phase-residual and independent ground over current
measurements, negative sequence over current, and breaker failure. Three phase over/under voltage,
negative and zero sequence voltage, forward and reverse over power, loss of excitation, over excitation,
over/under and rate-of-change of frequency, Sync check functions are standard features, Rotor Earth
Fault Protection, 100% Stator fault Protection, Percent Differential Protection as well as Neutral
Differential Protection, The system having Communication Protocols IEC61850, Modbus, Rear Ethernet.
- Three-phase instantaneous over current protection - 50
- Three-phase time over current protection - 51
- Residual instantaneous over current protection - 50N
- Residual time over current protection - 51N
- Generator Differential Protection - 87G
- Out-of-step - 78
- Negative sequence over current protection - 46
- Thermal Protection - 49
- Definite time over voltage protection - 59
- Definite time under voltage protection - 27
- Residual over voltage protection - 59N
- Over frequency protection - 81O
- Under frequency protection - 81U
- Rate of change of frequency protection - 81R
- Over excitation - 24
- Loss of Excitation - 40
- Synchrocheck - 25
- Fuse Failure(VTS) - 60
- Current unbalance protection - 60
- Breaker failure protection - 50BF
- Direction overpower - 32
- Directional under power - 32
Following protections are integrated in protection relay.
Digital & Analog I/O
- Digital Inputs - 11
- Digital Outputs - 8
- Analog Inputs - 8
- Analog Outputs - 8
Event Recording and Communication
- 1000 Event recorder
- USB Communication
- RS-485 Modbus
- Ethernet
- IEC 61850
