zhengzengdong 发表于 2013-5-26 19:47 0 P0 t5 {. i( ?6 ?# Z2 a7 `$ A UPS电源不清楚,但是对于GB4943里面次级电路都要做SELV,你查看表2H,初级和SELV之间就是加强绝缘,查看表5 ...