配電(dian)(dian)(dian)箱是按電(dian)(dian)(dian)氣(qi)接(jie)線(xian)要求將開(kai)關設備、測(ce)量(liang)儀(yi)表(biao)、保(bao)護電(dian)(dian)(dian)器和輔(fu)助設備組(zu)裝在封(feng)閉(bi)或半封(feng)閉(bi)金屬柜中或屏幅上，構(gou)成低壓配電(dian)(dian)(dian)箱。正(zheng)(zheng)常運(yun)(yun)行(xing)時(shi)可(ke)借助手動或自動開(kai)關接(jie)通或分斷(duan)電(dian)(dian)(dian)路(lu)。故(gu)障或不(bu)正(zheng)(zheng)常運(yun)(yun)行(xing)時(shi)借助保(bao)護電(dian)(dian)(dian)器切斷(duan)電(dian)(dian)(dian)路(lu)或報(bao)警。借測(ce)量(liang)儀(yi)表(biao)可(ke)顯示運(yun)(yun)行(xing)中的各種參數，還(huan)可(ke)對(dui)某些電(dian)(dian)(dian)氣(qi)參數進行(xing)調(diao)整，對(dui)偏離正(zheng)(zheng)常工作(zuo)狀態進行(xing)提示或發出信(xin)號。