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.
应用两种形式的励磁线圈，实测了五种型号的真空灭弧室内气体压强与磁控放电离子电流的关系曲线，并对试验结果进行了理论分。
Two types of exciting coils have been used to obtain the relationship of the internal pressures and the ionic currents of magnetron discharge for 5 types of vacuum interrupter.
应用两种形式的励磁线圈，实测了五种型号的真空灭弧室内气体压强与磁控放电离子电流的关系曲线，并对试验结果进行了理论分。
Two types of exciting coils have been used to obtain the relationship of the internal pressures and the ionic currents of magnetron discharge for 5 types of vacuum interrupter.
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