Moderate
Large internal faults are protected by_______________?
Correct answer: A. merz price percentage differential protection
- A. merz price percentage differential protection
- B. mho and ohm relays
- C. horn gaps and temperature relays
- D. earth fault and positive sequence relays
Explanation
Merz-Price percentage differential protection compares currents entering and leaving the protected zone, so an internal fault produces a differential current and rapid tripping. Mho and ohm relays are mainly distance-protection relays for transmission lines.
Last updated
Practise Power Systems
334 free Power Systems MCQs from Electrical Engineering, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Electrical Engineering questions like this
Electrical Engineering is on 2 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.