Reactance relays are generally used for the protection of

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Reactance relays are generally used for the protection of:

  1. Long transmission lines only
  2. Short transmission lines only
  3. Medium transmission lines only
  4. All of the above

Correct answer: 2. Short transmission lines only

Explanation: Reactance relays play a crucial role in the protection of transmission lines, particularly in the context of short transmission lines. These relays are characterized as overcurrent relays with directional restraint, specifically designed to operate independently of arc resistance. They are adept at detecting and responding to phase faults in short transmission lines and are commonly employed for earth fault protection in such scenarios.

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