配電箱是按電(dian)(dian)氣(qi)接(jie)線(xian)要求將開關(guan)設(she)備、測量(liang)儀(yi)表、保(bao)護(hu)電(dian)(dian)器和輔助設(she)備組裝在封閉或(huo)半封閉金(jin)屬柜中或(huo)屏幅上，構成低壓(ya)配電(dian)(dian)箱。正常(chang)運行(xing)(xing)時可(ke)借助手動或(huo)自動開關(guan)接(jie)通或(huo)分(fen)斷(duan)電(dian)(dian)路。故障或(huo)不正常(chang)運行(xing)(xing)時借助保(bao)護(hu)電(dian)(dian)器切斷(duan)電(dian)(dian)路或(huo)報警。借測量(liang)儀(yi)表可(ke)顯示運行(xing)(xing)中的各種(zhong)參數，還可(ke)對(dui)某些電(dian)(dian)氣(qi)參數進(jin)行(xing)(xing)調整，對(dui)偏(pian)離正常(chang)工作狀態進(jin)行(xing)(xing)提示或(huo)發出信(xin)號。