漏电断路掣,又称“水气掣”,是一种断电装置,它的作用是避免漏电引起的危险,工作原理是在没有漏电的情况下,从火线流出的电流通过电器用品后再流回中线的电量理应相等,而当发生漏电时,部份电流经电器的外壳或人体流向地壳,使流出火线与流回中线的电流量产生不平衡,当这个差额大于设定量时,就会触发漏电断路装置的感应线路截断电源,防止触电发生。

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