配(pei)電(dian)(dian)箱是(shi)按電(dian)(dian)氣接線(xian)要求(qiu)將開關設備、測量(liang)儀表、保(bao)護電(dian)(dian)器和輔(fu)助(zhu)設備組裝在封(feng)閉或(huo)(huo)(huo)半封(feng)閉金屬柜中或(huo)(huo)(huo)屏(ping)幅(fu)上(shang)，構(gou)成低壓配(pei)電(dian)(dian)箱。正(zheng)常運行(xing)(xing)時可借(jie)(jie)助(zhu)手動或(huo)(huo)(huo)自(zi)動開關接通或(huo)(huo)(huo)分斷(duan)電(dian)(dian)路。故障或(huo)(huo)(huo)不正(zheng)常運行(xing)(xing)時借(jie)(jie)助(zhu)保(bao)護電(dian)(dian)器切斷(duan)電(dian)(dian)路或(huo)(huo)(huo)報警(jing)。借(jie)(jie)測量(liang)儀表可顯示運行(xing)(xing)中的(de)各種參(can)數，還(huan)可對某些電(dian)(dian)氣參(can)數進(jin)行(xing)(xing)調整，對偏離正(zheng)常工作狀態進(jin)行(xing)(xing)提示或(huo)(huo)(huo)發出信號。