检查热继电器是否跳闸。
对于后备保护装置防止高阻抗接地故障，将配置一只双极方向过电流继电器，同瞬时跳闸附件的时间成反比。
For backup protection against high resistive ground faults, there will be a dual polarized directional overcurrent relay, inverse time with instantaneous trip attachment.
使用者可将继电器接地故障跳闸电流设置为高于最高值几毫安，以准确测量系统充电。
User is able to set the ground fault trip current of the relay just milliamps above the highest level, to accurately measure the system charging.
主机总电源开关不能启动：检查主令继电器是否损坏，过流继电器是否跳闸。
Total mainframe power switch could not be activated: check whether the Master relay is damaged, whether the flow relay tripped.
KA5为跳闸报警继电器。当设备产生偏励磁、可控硅故障、过电流等故障时，KA5吸合，断路器分励线圈得电跳闸，切断主电源。
When there are bias excitation, controllable silicon failure, over current and other failures, KA5 gets absorbed and breaker loop trips by powered on so as for switching off main power supply.
KA5为跳闸报警继电器。当设备产生偏励磁、可控硅故障、过电流等故障时，KA5吸合，断路器分励线圈得电跳闸，切断主电源。
When there are bias excitation, controllable silicon failure, over current and other failures, KA5 gets absorbed and breaker loop trips by powered on so as for switching off main power supply.
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