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　　高壓開(kai)關柜(ju)廠(chang)(chang)家(jia)所生產(chan)的(de)XL-21 型(xing)低壓動(dong)力配電(dian)柜(ju)適用(yong)于發電(dian)廠(chang)(chang)及(ji)礦業企(qi)業，在交流電(dian)壓500伏及(ji)以下三相四線系統中用(yong)于動(dong)力分配。

　　XL-21 型(xing)低壓動力(li)配電箱系(xi)戶內裝置墻(qiang)安裝，屏前檢修。

　　XL-21低壓配(pei)電(dian)(dian)(dian)柜(ju)關閉(bi)，外殼由(you)鋼(gang)板制(zhi)成，刀開(kai)關操(cao)作手柄安裝(zhuang)(zhuang)在前(qian)右柱(zhu)上部，可(ke)用作開(kai)關電(dian)(dian)(dian)源。在配(pei)電(dian)(dian)(dian)箱(xiang)(xiang)(xiang)前(qian)面安裝(zhuang)(zhuang)電(dian)(dian)(dian)壓表(biao)以指示母線的電(dian)(dian)(dian)壓。配(pei)電(dian)(dian)(dian)箱(xiang)(xiang)(xiang)前(qian)面有(you)(you)一(yi)扇門(men)(men)，配(pei)電(dian)(dian)(dian)箱(xiang)(xiang)(xiang)內的所有(you)(you)設(she)備在開(kai)門(men)(men)后都暴露出來，便于維(wei)護和(he)維(wei)護。該配(pei)電(dian)(dian)(dian)箱(xiang)(xiang)(xiang)是我國自行(xing)設(she)計的配(pei)電(dian)(dian)(dian)箱(xiang)(xiang)(xiang)，具有(you)(you)結構(gou)緊湊、維(wei)修方便、線路(lu)方案靈活(huo)組合等特(te)點。除(chu)空氣斷路(lu)器(qi)(qi)和(he)熔斷器(qi)(qi)作為短路(lu)保護外，配(pei)電(dian)(dian)(dian)箱(xiang)(xiang)(xiang)還配(pei)有(you)(you)接(jie)觸器(qi)(qi)和(he)熱繼電(dian)(dian)(dian)器(qi)(qi)，箱(xiang)(xiang)(xiang)門(men)(men)前(qian)門(men)(men)可(ke)配(pei)備操(cao)作按鈕(niu)和(he)指示器(qi)(qi)。

　　這種配電(dian)(dian)箱通常(chang)是(shi)形狀設計(ji)，可在設計(ji)選擇上稍加修(xiu)改(gai)，如增(zeng)加或減(jian)少電(dian)(dian)路數目、改(gai)變電(dian)(dian)流(liu)規格、更換器(qi)件等。

　　現在設(she)計較(jiao)少直(zhi)接選用了，常(chang)常(chang)直(zhi)接給(gei)出主(zhu)電路，箱體規格尺寸交給(gei)成套(tao)廠制定(ding)。