用来对直流配电系统的设施和电气设备进行过载、短路保护之用，也可用作线路频繁操作转换作用，广泛用于电力、工矿等行业。
It's used to protect the installations of DC power distribution system and electric equipments against overload and short circuit as well as for conversion of frequent operation of circuit.
用来对直流配电系统的设施和电气设备进行过载、短路保护之用，也可用作线路频繁操作转换作用，广泛用于电力、工矿等行业。
It's used to protect the installations of DC power distribution system and electric equipments against overload and short circuit as well as for conversion of frequent operation of circuit.
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