配電箱是(shi)按電(dian)(dian)(dian)氣接線要求將開關設備、測量儀表、保護電(dian)(dian)(dian)器(qi)和輔助設備組裝在封閉或(huo)(huo)半(ban)封閉金屬柜(ju)中或(huo)(huo)屏幅上，構成低(di)壓配(pei)電(dian)(dian)(dian)箱。正常(chang)運(yun)行(xing)(xing)時可借助手動(dong)或(huo)(huo)自(zi)動(dong)開關接通或(huo)(huo)分(fen)斷電(dian)(dian)(dian)路。故障或(huo)(huo)不正常(chang)運(yun)行(xing)(xing)時借助保護電(dian)(dian)(dian)器(qi)切斷電(dian)(dian)(dian)路或(huo)(huo)報警(jing)。借測量儀表可顯示(shi)運(yun)行(xing)(xing)中的(de)各種參數，還可對某些電(dian)(dian)(dian)氣參數進(jin)行(xing)(xing)調整，對偏離正常(chang)工(gong)作(zuo)狀態進(jin)行(xing)(xing)提示(shi)或(huo)(huo)發出(chu)信號。