結構特點

XL-21型(xing)低(di)壓動力配電(dian)(dian)(dian)(dian)箱(xiang)(xiang)(xiang)系(xi)封閉式(shi)，外(wai)殼用(yong)鋼板彎制(zhi)而成(cheng)，刀(dao)開關操(cao)(cao)作(zuo)(zuo)手柄于箱(xiang)(xiang)(xiang)前(qian)右柱(zhu)上部，可(ke)(ke)以(yi)作(zuo)(zuo)為切換電(dian)(dian)(dian)(dian)源之用(yong)。配電(dian)(dian)(dian)(dian)箱(xiang)(xiang)(xiang)前(qian)面裝(zhuang)(zhuang)有(you)一只電(dian)(dian)(dian)(dian)壓表，指(zhi)(zhi)示(shi)匯流母線(xian)的電(dian)(dian)(dian)(dian)壓。配電(dian)(dian)(dian)(dian)箱(xiang)(xiang)(xiang)前(qian)面有(you)門，門打開后，配電(dian)(dian)(dian)(dian)箱(xiang)(xiang)(xiang)內(nei)全(quan)部設(she)備(bei)敞露(lu)、便于檢修維(wei)護。本配電(dian)(dian)(dian)(dian)箱(xiang)(xiang)(xiang)均采用(yong)國內(nei)自行設(she)計(ji)的型(xing)組件，具有(you)結構緊(jin)湊，檢修方(fang)便，線(xian)路(lu)方(fang)案可(ke)(ke)以(yi)靈(ling)活組合等(deng)特點(dian)。配電(dian)(dian)(dian)(dian)箱(xiang)(xiang)(xiang)除裝(zhuang)(zhuang)有(you)空氣斷路(lu)器和(he)熔斷器作(zuo)(zuo)為短(duan)路(lu)保護外(wai)，還裝(zhuang)(zhuang)有(you)接觸(chu)器和(he)熱繼電(dian)(dian)(dian)(dian)器，箱(xiang)(xiang)(xiang)前(qian)門可(ke)(ke)裝(zhuang)(zhuang)操(cao)(cao)作(zuo)(zuo)按鈕和(he)指(zhi)(zhi)示(shi)燈。