Which of the following is a key feature of a microprocessor-based overcurrent relay that enhances its performance in fault detection?

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  1. It uses analogue components to process current signals.
  2. It only protects against short-circuit faults.
  3. It incorporates fault analysis algorithms to identify fault types.
  4. It does not require a power supply for operation.

Answer (Detailed Solution Below)

Option 3 : It incorporates fault analysis algorithms to identify fault types.
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Detailed Solution

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The correct answer is: 3) It incorporates fault analysis algorithms to identify fault types.

Explanation:

A microprocessor-based overcurrent relay is a digital protection device that offers advanced performance over traditional electromechanical or static relays. Its key feature is the ability to:

  • Use software algorithms for:

    • Fault detection

    • Fault classification (e.g., short-circuit, overload)

    • Decision-making based on multiple parameters

  • Enhance reliability, speed, and selectivity in identifying and responding to faults.

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