Synchronous Machine Protection Control & Monitoring System



Transformer Protection System
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The multifunction numeric relay that provides differential protection, over current, Instantaneous over current, restricted earth fault, zero sequence earth fault current, negative sequence over current, breaker failure and over/under voltage protection. Facility to synchronize relay time from SCADA, monitoring and control, sequence-of-events recording, fault reporting. 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 - 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