2.9.4e.
标准关于与危险电压的隔离举了三种方法,其中方法1) 2)很好理解,但是方法3)什么意思,以前都没注意这个东西。原文是:e) Method3) BASICINSULATIONonthepartataHAZARDOUSVOLTAGE,togetherwith connection oftheotherpartto themain protectiveearthingterminalin accordance with 2.6.1b),such thatthe voltagelimitsfortheaccessible partare maintained byrelative circuitimpedancesorbytheoperationofaprotectivedevice;or
然后后面还解释了: Fore),itispermitted toprotectacircuitbyearthinga partotherthan the protectedcircuit itself,forexample,the secondarywinding ofa transformersupplying theprotectedcircuit.
不解释还好,一解释蒙圈。给被保护电路的供电的次级绕组接地,然后危险电压和被保护电路之间只需要BI就行了。what?...
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