外壳为钢板焊接而成. 内装有自耦变压器,交流接触器,时间继电器. 中间继电器,热继电器,电流互感器,转换开关 熔断器,电压表,电流表,指示灯等. 具有过载,短路,失压,断相保护等功能. 符合GB3836-2000,IEC60079 标准要求. The shell is welded of steel plates. Inside is arranged varitran,AC contactor,time relay,interposiong relay,thermal relay,current transformet,selector,fuse,voltmeter, Ammeterindicator etc. Steel tube wiring or cable wiring. Suitable for GB3836-2000,IEC60079 standard request.
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