高清一区二区三区精品|亚洲欧美日韩中文字幕在线不卡|又黄又爽又硬又爽又硬A片|亚洲性爱日韩无码视频

021-51060669
產品中心
Moulded-Case Circuit Breaker SM40 thermo-magnetic MCCB

久久国产精品系列-日韩高清国内精品制服丝袜

高清一区二区三区精品|亚洲欧美日韩中文字幕在线不卡|又黄又爽又硬又爽又硬A片|亚洲性爱日韩无码视频

 SM40 series thermo-magnetic MCCB ( for short hereafter), one of the SM40 series products, is a new-style one developed by this factory be means of the international advanced knowhow of design and manufacture theory, and suitable for the non-frequent conversion in the circuit of AC 50Hz, rated insulating voltage 800V, rated working voltage below 690V and rated working currentup to 2500A and the non-frequent starting of motors. The breakers have overload , short-circuit and under voltage protection devices so as to protect the circuit and the power equipment against damage.