Protection System

Protection System

  • Protective relays which respond to electrical quantities,
  • Communications systems necessary for correct operation of protective functions
  • Voltage and current sensing devices providing inputs to protective relays,
  • Station dc supply associated with protective functions (including station batteries, battery chargers, and non-battery-based dc supply), and
  • Control circuitry associated with protective functions through the trip coil(s) of the circuit breakers or other interrupting devices.

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