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电表漏电保护器是不是必须安装？

电表漏电保护器是不是必须安装？

浏览：50次 | 提问时间： 08-07 02:50

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3个答案

城堡中的小鸟 08-07 02:51

总电表箱不需要安装漏电保护器，只要功率足够的空开做总开关就可以了，漏电保护器安装在分线后插座线路上，一般总电表箱都在室外，*作不方便

懂你不易 08-07 02:59

看需要。单相电能表是单独装的，用封条封住，以免电有被盗的可能，除非你自己用电只用来记电度数的，不用封，如果漏电保护器被封了，你怎合上电。一般装好电表后再装漏电保护器。漏电保护器的接线是上进下出线，在供电部门认为你不会偷电的情况下，允许了，装漏电保护器后再装电能表也可以。

感谢经历 08-07 03:08

一、新式断路器一般都是具有漏电保护功能的，是不需要安装漏电保护器的；但如果是老式的断路器，一般只具有过流、超载、短路等功能，是需要安装漏电保护器的，不能一概而论。二、断路器的相关知识：1、断路器的定义：断路器是指能够关合、承载和开断正常回路条件下的电流并能关合、在规定的时间内承载和开断异常回路条件下的电流的开关装置。断路器可用来分配电能，不频繁地启动异步电动机，对电源线路及电动机等实行保护，当它们发生严重的过载或者短路及欠压等故障时能自动切断电路，其功能相当于熔断器式开关与过欠热继电器等的组合。而且在分断故障电流后一般不需要变更零部件。目前，已获得了广泛的应用。断路器按其使用范围分为高压断路器，和低压断路器，高低压界线划分比较模糊，一般将3kV以上的称为高压电器。2、断路器的工作原理：（1）断路器一般由触头系统、灭弧系统、*作机构、脱扣器、外壳等构成。（2）当短路时，大电流（一般10至12倍）产生的磁场克服反力弹簧，脱扣器拉动*作机构动作，开关瞬时跳闸。当过载时，电流变大，发热量加剧，双金属片变形到一定程度推动机构动作（电流越大，动作时间越短）。（3）*型断路器使用互感器采集各相电流大小，与设定值比较，当发生漏电现象，电流异常时微处理器发出信号，并放大与之相对应的电压信号，使*脱扣器带动*作机构动作。（4）断路器的作用是切断和接通负荷电路，以及切断故障电路，防止事故扩大，保证安全运行。而高压断路器要开断1500V，电流为1500-2000A的电弧，这些电弧可拉长至2m仍然继续燃烧不熄灭。故灭弧是高压断路器必须解决的问题。

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