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.
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