為(wei)什么要這樣做呢,道理很簡單,下面要(yao)廣(guang)珠電氣帶我們來吧.
1 有接地無漏保的(de)情況
當漏(lou)(lou)電(dian)(dian)(dian)產生的電(dian)(dian)(dian)流不足以讓熔斷器(qi)(斷路器(qi))熔斷(跳閘)切斷電(dian)(dian)(dian)源時,漏(lou)(lou)電(dian)(dian)(dian)現象會一(yi)直存在,盡管漏(lou)(lou)電(dian)(dian)(dian)電(dian)(dian)(dian)壓不一(yi)定(ding)和電(dian)(dian)(dian)源電(dian)(dian)(dian)壓一(yi)樣高,但是觸碰(peng)帶電(dian)(dian)(dian)外(wai)殼還是很(hen)危險的。
2 有(you)漏保無接(jie)地的情況
當電器的金屬外殼漏電時,因為沒有接地線就沒有漏電電流產生,漏電保護(hu)器不會動作跳閘切斷電源,危險的電壓一直存在著,直至有人碰到帶電的外殼才動作跳閘,這顯然相當被動。