relays are used for phase faults on long line?
Correct answer: A. Impedance
- A. Impedance
- B. Reactance
- C. Either of the above
- D. None of the above
Explanation
Impedance relays are commonly used for phase-fault protection, particularly on short and medium transmission lines. Reactance relays are more commonly selected for earth-fault protection because their reach is less affected by fault resistance.
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