指除安裝面外，其它所有側面都被封閉起來的一種低壓開關柜。這種柜子的開關、保護和監測控制等電氣元件，安寧電表箱均安裝在一個用鋼或絕緣材料制成的封閉外殼內，可靠墻或離墻安裝。電表箱廠家柜(ju)內每條(tiao)回路(lu)之間可以(yi)不加隔離措施，也可以(yi)采(cai)用接(jie)地的金(jin)屬板或絕緣板進(jin)行隔離。通常門與主開關操作有機械聯鎖。另外還有防護(hu)式(shi)臺(tai)型開關柜(ju)（即(ji)控(kong)制臺(tai)）】面板上裝有控(kong)制、測量(liang)、信號(hao)等電(dian)器。防護(hu)式(shi)開關柜(ju)主要用作工(gong)藝現場的配(pei)電(dian)裝置。

1.主(zhu)母(mu)線最大(da)額(e)(e)定(ding)(ding)電(dian)(dian)(dian)流(liu)(liu)(liu):主(zhu)母(mu)線最大(da)能(neng)夠承載的(de)(de)(de)電(dian)(dian)(dian)流(liu)(liu)(liu)的(de)(de)(de)額(e)(e)定(ding)(ding)值(zhi)。2.額(e)(e)定(ding)(ding)短時耐(nai)(nai)受電(dian)(dian)(dian)流(liu)(liu)(liu):由生產廠(chang)(chang)家給(gei)出(chu)的(de)(de)(de),成套設備中某條電(dian)(dian)(dian)路在國(guo)(guo)家標(biao)準(zhun)GB7251.1-2005中8.2.3規(gui)定(ding)(ding)的(de)(de)(de)試驗條件(jian)下(xia)能(neng)安(an)全承載的(de)(de)(de)短時耐(nai)(nai)受電(dian)(dian)(dian)流(liu)(liu)(liu)方(fang)(fang)均根值(zhi)。3.峰值(zhi)短時耐(nai)(nai)受電(dian)(dian)(dian)流(liu)(liu)(liu):在規(gui)定(ding)(ding)試驗條件(jian)下(xia),生產廠(chang)(chang)家規(gui)定(ding)(ding)此電(dian)(dian)(dian)路能(neng)夠圓滿地承受的(de)(de)(de)峰值(zhi)電(dian)(dian)(dian)流(liu)(liu)(liu)。4.外(wai)殼(ke)防護等(deng)級:IEC60529-1989標(biao)準(zhun)由成套設備提(ti)供的(de)(de)(de)防止觸及帶電(dian)(dian)(dian)部(bu)件(jian),以及外(wai)來固(gu)體的(de)(de)(de)侵入和液體的(de)(de)(de)進入的(de)(de)(de)等(deng)級。具體等(deng)級劃分(fen)詳(xiang)見(jian)IEC60529標(biao)準(zhun)。5.內部(bu)分(fen)隔(ge)方(fang)(fang)式:根據IEC60529-1989標(biao)準(zhun),為保護人(ren)身安(an)全,將開(kai)關柜(ju)獨(du)立劃分(fen)成幾(ji)個隔(ge)室的(de)(de)(de)不同方(fang)(fang)式。不同型號的(de)(de)(de)配(pei)電(dian)(dian)(dian)柜(ju)之間(jian)的(de)(de)(de)技術參(can)數都有很(hen)大(da)不同,而進口(kou)配(pei)電(dian)(dian)(dian)柜(ju)的(de)(de)(de)技術參(can)數基本都優于國(guo)(guo)產配(pei)電(dian)(dian)(dian)柜(ju),但并不能(neng)認為進口(kou)配(pei)電(dian)(dian)(dian)柜(ju)就一定(ding)(ding)比國(guo)(guo)產配(pei)電(dian)(dian)(dian)柜(ju)好。

常稱開(kai)關(guan)板或配電(dian)(dian)(dian)屏。它(ta)是一種有面(mian)(mian)板遮(zhe)攔的(de)開(kai)啟(qi)式開(kai)關(guan)柜，正面(mian)(mian)有防(fang)護(hu)作用，背面(mian)(mian)和側面(mian)(mian)仍能(neng)觸及帶電(dian)(dian)(dian)部分，防(fang)護(hu)等級低(di)，只能(neng)用于對供電(dian)(dian)(dian)連續(xu)性和可靠(kao)性要求(qiu)較低(di)的(de)工礦企業，作變電(dian)(dian)(dian)室集中供電(dian)(dian)(dian)用。

配電箱(xiang)是(shi)數(shu)據上的海量參數(shu)，一般是(shi)構(gou)成(cheng)低(di)壓林按(an)電氣接線，要(yao)求將開(kai)關(guan)設備、測(ce)量儀表(biao)、保(bao)護電器和輔助(zhu)設備組裝在封(feng)閉或(huo)半封(feng)閉金(jin)屬柜中或(huo)屏(ping)幅上，構(gou)成(cheng)低(di)壓配電箱(xiang)。正常運行時可借助(zhu)手(shou)動或(huo)自(zi)動開(kai)關(guan)接通或(huo)分(fen)斷電路。

必(bi)須選用符合(he)GB 6829《剩(sheng)余電(dian)(dian)(dian)流(liu)動作保護器的(de)一(yi)般(ban)要(yao)求》標(biao)準(zhun)、并經(jing)中國電(dian)(dian)(dian)工產品認(ren)證(zheng)委(wei)員會認(ren)證(zheng)合(he)格的(de)產品。可選用類似LJM（J）系(xi)列節電(dian)(dian)(dian)型、且是低(di)靈敏(min)度的(de)延時(shi)型保護器。保護器裝(zhuang)置(zhi)的(de)方式要(yao)符合(he)國家(jia)GB13955-2005《剩(sheng)余電(dian)(dian)(dian)流(liu)動作保護裝(zhuang)置(zhi)的(de)安裝(zhuang)和運行》標(biao)準(zhun)。漏電(dian)(dian)(dian)保護器的(de)分斷時(shi)間，當(dang)漏電(dian)(dian)(dian)電(dian)(dian)(dian)流(liu)為額定(ding)漏電(dian)(dian)(dian)電(dian)(dian)(dian)流(liu)時(shi)，其動作時(shi)間不應大于(yu)0.s。