ATPL: On detection of a persistent phase imbalance between an AC generator connected to the main bus bars and other AC generators, the protection device that opens is/are the:
Question 532, Aircraft General Knowledge - Airframe, Systems, Powerplant - ATPL - Airline Transport Pilot license
Explanation: On detection of a persistent phase imbalance between an AC generator connected to the main bus bars and other AC generators, the protection device that opens is/are the: