結(jie)構特點(dian)

XL-21型(xing)低壓(ya)動力配(pei)電(dian)(dian)箱(xiang)系封閉(bi)式，外(wai)(wai)殼用鋼板(ban)彎制而(er)成(cheng)，刀開(kai)關操(cao)作手柄于(yu)箱(xiang)前右柱上(shang)部(bu)，可以作為(wei)切換(huan)電(dian)(dian)源(yuan)之用。配(pei)電(dian)(dian)箱(xiang)前面裝(zhuang)(zhuang)有(you)(you)一只電(dian)(dian)壓(ya)表(biao)，指示匯流母(mu)線(xian)(xian)的電(dian)(dian)壓(ya)。配(pei)電(dian)(dian)箱(xiang)前面有(you)(you)門，門打開(kai)后(hou)，配(pei)電(dian)(dian)箱(xiang)內全(quan)部(bu)設(she)(she)備(bei)敞露、便于(yu)檢修(xiu)維護(hu)。本配(pei)電(dian)(dian)箱(xiang)均采用國(guo)內自(zi)行(xing)設(she)(she)計(ji)的型(xing)組件，具(ju)有(you)(you)結構緊湊(cou)，檢修(xiu)方便，線(xian)(xian)路(lu)方案可以靈活組合等特點。配(pei)電(dian)(dian)箱(xiang)除裝(zhuang)(zhuang)有(you)(you)空氣斷路(lu)器(qi)(qi)和(he)熔斷器(qi)(qi)作為(wei)短路(lu)保護(hu)外(wai)(wai)，還裝(zhuang)(zhuang)有(you)(you)接觸器(qi)(qi)和(he)熱繼電(dian)(dian)器(qi)(qi)，箱(xiang)前門可裝(zhuang)(zhuang)操(cao)作按鈕和(he)指示燈。