In case of failure of prime mover of the generator, which type of relay is used

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Electrical Engineering XYZ MCQs

In case of failure of prime mover of the generator, which type of relay is used:

  1. Distance relays
  2. Offset mho relay
  3. Reverse power relay
  4. Impedance relay

Correct answer: 3. Reverse power relay

Explanation: Reverse power relays are designed to protect against the reversal of power flow in a generator. In the event of prime mover failure, the generator might continue to consume power from the grid, causing reverse power flow. Reverse power relays detect this condition and trip the generator to prevent damage.

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