Through cause analysis, the authors believe the operationalpowersupply failure leading to the disability of actuator of the breaker may be the possible cause.
分析了事故原因，指出操作电源故障致使操作机构不能正常动作是事故的可能起因。
2
It is suggested that the excitation transformer power be introduced as the operationalpowersupply for the regulator, and the rotor overvoltage protection of the unit be modified.