配電(dian)(dian)箱是(shi)按電(dian)(dian)氣接(jie)線要求將(jiang)開關(guan)設(she)備、測量(liang)(liang)儀(yi)表、保護(hu)電(dian)(dian)器和輔助(zhu)(zhu)設(she)備組裝在封閉或(huo)半(ban)封閉金屬(shu)柜中(zhong)或(huo)屏幅上(shang)，構(gou)成低(di)壓(ya)配電(dian)(dian)箱。正(zheng)常運行(xing)(xing)時(shi)可(ke)借助(zhu)(zhu)手動或(huo)自動開關(guan)接(jie)通(tong)或(huo)分斷電(dian)(dian)路(lu)。故(gu)障或(huo)不正(zheng)常運行(xing)(xing)時(shi)借助(zhu)(zhu)保護(hu)電(dian)(dian)器切斷電(dian)(dian)路(lu)或(huo)報警。借測量(liang)(liang)儀(yi)表可(ke)顯示運行(xing)(xing)中(zhong)的各種參(can)數，還可(ke)對某些電(dian)(dian)氣參(can)數進行(xing)(xing)調整，對偏離正(zheng)常工作狀態進行(xing)(xing)提示或(huo)發出(chu)信號。