三相漏电开关，三相电流总和为0才能不跳闸。三相四线漏电开关，三相及零线四根线的电流总和为0才能不跳闸
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\u5f53\u51fa\u73b0\u6f0f\u7535\u73b0\u8c61\u65f6\uff0c\u56db\u6761\u7ebf\u7684\u603b\u7535\u6d41\u5c31\u4f1a\u4e0d\u4e3a\u96f6\uff0c\u8d85\u8fc730\u6beb\u5b890.3\u79d2\uff0c\u4e8e\u662f\u5c31\u4f1a\u8df3\u95f8\u3002
\u96f6\u7ebf\u5fc5\u987b\u63a5\u5230\u6f0f\u7535\u5f00\u5173\u4e0a\uff0c\u5426\u5219\u6f0f\u7535\u4fdd\u62a4\u5668\u4e0d\u4f1a\u52a8\u4f5c\u3002
\u6f0f\u7535\u4fdd\u62a4\u5668\u63a5\u7ebf\u8981\u6c42\u5982\u4e0b\uff1a
1\u3001 \u6807\u6709\u7535\u6e90\u4fa7\u548c\u8d1f\u8377\u4fa7\u7684\u6f0f\u7535\u4fdd\u62a4\u5668\u4e0d\u5f97\u63a5\u53cd\u3002\u5982\u679c\u63a5\u53cd\uff0c\u4f1a\u5bfc\u81f4\u7535\u5b50\u5f0f\u6f0f\u7535\u4fdd\u62a4\u5668\u7684\u8131\u6263\u7ebf\u5708\u65e0\u6cd5\u968f\u7535\u6e90\u5207\u65ad\u800c\u65ad\u7535\uff0c\u4ee5\u81f4\u957f\u65f6\u95f4\u901a\u7535\u800c\u70e7\u6bc1\u3002
3\u3001\u5b89\u88c5\u6f0f\u7535\u4fdd\u62a4\u5668\u4e0d\u5f97\u62c6\u9664\u6216\u653e\u5f03\u539f\u6709\u7684\u5b89\u5168\u9632\u62a4\u63aa\u65bd\uff0c\u6f0f\u7535\u4fdd\u62a4\u5668\u53ea\u80fd\u4f5c\u4e3a\u7535\u6c14\u5b89\u5168\u9632\u62a4\u7cfb\u7edf\u4e2d\u7684\u9644\u52a0\u4fdd\u62a4\u63aa\u65bd\u3002
4\u3001\u5b89\u88c5\u6f0f\u7535\u4fdd\u62a4\u5668\u65f6\uff0c\u5fc5\u987b\u4e25\u683c\u533a\u5206\u4e2d\u6027\u7ebf\u548c\u4fdd\u62a4\u7ebf\u3002\u4f7f\u7528\u4e09\u6781\u56db\u7ebf\u5f0f\u548c\u56db\u6781\u56db\u7ebf\u5f0f\u6f0f\u7535\u4fdd\u62a4\u5668\u65f6\uff0c\u4e2d\u6027\u7ebf\u5e94\u63a5\u5165\u6f0f\u7535\u4fdd\u62a4\u5668\u3002\u7ecf\u8fc7\u6f0f\u7535\u4fdd\u62a4\u5668\u7684\u4e2d\u6027\u7ebf\u4e0d\u5f97\u4f5c\u4e3a\u4fdd\u62a4\u7ebf\u3002
5\u3001\u5de5\u4f5c\u96f6\u7ebf\u4e0d\u5f97\u5728\u6f0f\u7535\u4fdd\u62a4\u5668\u8d1f\u8377\u4fa7\u91cd\u590d\u63a5\u5730\uff0c\u5426\u5219\u6f0f\u7535\u4fdd\u62a4\u5668\u4e0d\u80fd\u6b63\u5e38\u5de5\u4f5c\u3002
6\u3001\u91c7\u7528\u6f0f\u7535\u4fdd\u62a4\u5668\u7684\u652f\u8def\uff0c\u5176\u5de5\u4f5c\u96f6\u7ebf\u53ea\u80fd\u4f5c\u4e3a\u672c\u56de\u8def\u7684\u96f6\u7ebf\uff0c\u7981\u6b62\u4e0e\u5176\u4ed6\u56de\u8def\u5de5\u4f5c\u96f6\u7ebf\u76f8\u8fde\uff0c\u5176\u4ed6\u7ebf\u8def\u6216\u8bbe\u5907\u4e5f\u4e0d\u80fd\u501f\u7528\u5df2\u91c7\u7528\u6f0f\u7535\u4fdd\u62a4\u5668\u540e\u7684\u7ebf\u8def\u6216\u8bbe\u5907\u7684\u5de5\u4f5c\u96f6\u7ebf\u3002
\u5982\u679c\u63a5\u7ebf\u6b63\u786e\uff0c\u6309\u8bd5\u9a8c\u6309\u94ae\u4e0d\u8df3\u95f8\uff0c\u90a3\u4e48\u80af\u5b9a\u662f\u6f0f\u7535\u5f00\u5173\u574f\u4e86\u3002
是这样，完全正确。不过有一点，是矢量和，是有方向的量，并不是简单的总和。
不是的 三相线一零线和大地之间的电流超过漏电保护器的额定动作电流才跳闸
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