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三相开水器没有零线如何安装漏电开关?_其他_设计456问答
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三相开水器没有零线如何安装漏电开关?

浏览:81次 | 提问时间: 08-03 08:19
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3个答案
七孙 08-03 08:20

三相380v开水器没有零线可以安装漏电开关。1、用三相漏电断路器。输入接三相电源,输出接开水器。2、用3P+N漏电断路器。输入接三相四线电源。输出接三相开水器。输出零线可能不用接。

淡忘 08-03 08:28

您好,据我了解的情况:把开水器的机架或者外壳金属部分引出接地线。如果开水器外壳完全塑料化,可以寻找开水器的水容器金属桶部位连接。   希望我的回答对您有所帮助。

你对谁都笑 08-03 08:36

一、三相四线漏电保护器入端必须接零线N。  二、某常用品牌380V三相四线空开(断路器)漏电保护器3P+N实物图如下图所示。由图中可知,零线N必须接入开关内,并与3根火线一起通过电流互感器一次线圈。正常工作时,三根火线流入的电流矢量和等于流出的零线电流,电流互感器的次级没有电流。如果不接零线,就会有剩余电流,电流互感器次级就会感应出电流,推动脱扣机构动作,空开跳闸。  三、当三根相线或其中任意根对地漏电或短路时,那么,三根相线的流入电流矢量和>流出的零线电流,如果电流值>设定的30mA,漏电保护开关跳闸断开电路。

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