Synchronous Machine Protection Control & Monitoring System



Line / Feeder Protection System
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The main protection in this application is the distance protection function with Three phase instantaneous over current protection , Three phase time over current protection, Directional Over Current Protection, Negative sequence over current protection, Over / Under Voltage Protection, Over / Under Frequency Protection , Fuse Failure, forward or reverse power protection, breaker monitoring and control, sequenceof- events recording, fault reporting, rate-of-change frequency. The system having Communication Protocols IEC61850, Modbus, Rear Ethernet.


    Following protections are integrated in protection relay.

  • Three-phase instantaneous over current protection - 50
  • Three-phase time over current protection - 51
  • Directional over current protection - 67
  • Breaker failure protection - 50BF
  • Transformer Differential Protection - 87
  • Under voltage protection - 27
  • Over voltage protection - 59
  • Negative sequence over current protection - 47
  • Loss of sensing voltage protection - 60FL
  • Over frequency protection - 81O
  • Under frequency protection - 81U
  • Rate of change of frequency protection - 81R
  • Over excitation - 24

Digital & Analog I/O

  • Digital Inputs - 7
  • Digital Outputs - 8
  • Analog Inputs - 8
  • Analog Outputs - 8


Event Recording and Communication

  • 1000 Event recorder
  • USB Communication
  • RS-485 Modbus
  • Ethernet
  • IEC 61850