relay bias
... relay bell 继电器铃 relay bias 继电器偏磁,继电器偏置 relay bias winding 继电器偏压线圈 ...
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继电器磁偏 relay magnetic bias
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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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