斷路(lu)器是(shi)一(yi)種只要電(dian)(dian)路(lu)中電(dian)(dian)流(liu)超過額定(ding)電(dian)(dian)流(liu)就(jiu)會自動斷開的開關,其質量的好壞直(zhi)接(jie)決定(ding)了(le)家庭用電(dian)(dian)是(shi)否安全。正確選擇(ze)額定(ding)容量電(dian)(dian)流(liu)大小(xiao)的斷路(lu)器很重要,如果(guo)額定(ding)電(dian)(dian)流(liu)偏小(xiao),斷路(lu)器易頻繁跳閘(zha),如果(guo)選擇(ze)過大,則(ze)達不(bu)到預期的保護效果(guo)。