配電(dian)(dian)箱是按電(dian)(dian)氣接(jie)線要求將開關(guan)設備、測(ce)量(liang)儀表、保護電(dian)(dian)器(qi)和輔助設備組裝在封閉或(huo)(huo)(huo)半封閉金(jin)屬柜中或(huo)(huo)(huo)屏幅上，構成低(di)壓(ya)配電(dian)(dian)箱。正常運行(xing)時可借(jie)助手動(dong)或(huo)(huo)(huo)自動(dong)開關(guan)接(jie)通或(huo)(huo)(huo)分斷(duan)(duan)電(dian)(dian)路。故(gu)障(zhang)或(huo)(huo)(huo)不(bu)正常運行(xing)時借(jie)助保護電(dian)(dian)器(qi)切斷(duan)(duan)電(dian)(dian)路或(huo)(huo)(huo)報警。借(jie)測(ce)量(liang)儀表可顯示運行(xing)中的各(ge)種參數，還可對(dui)(dui)某些電(dian)(dian)氣參數進行(xing)調整，對(dui)(dui)偏離正常工作狀態進行(xing)提示或(huo)(huo)(huo)發出(chu)信號(hao)。