結構特點

XL-21型(xing)低(di)壓動力配電(dian)(dian)箱(xiang)(xiang)系封閉式，外殼用(yong)(yong)鋼板彎制而成，刀開(kai)關操作(zuo)(zuo)手柄于箱(xiang)(xiang)前右柱上部，可以作(zuo)(zuo)為切換電(dian)(dian)源之用(yong)(yong)。配電(dian)(dian)箱(xiang)(xiang)前面(mian)裝(zhuang)(zhuang)有(you)一只(zhi)電(dian)(dian)壓表，指示匯流(liu)母線(xian)的電(dian)(dian)壓。配電(dian)(dian)箱(xiang)(xiang)前面(mian)有(you)門，門打開(kai)后，配電(dian)(dian)箱(xiang)(xiang)內全部設備敞露(lu)、便(bian)于檢(jian)修維(wei)護。本(ben)配電(dian)(dian)箱(xiang)(xiang)均(jun)采用(yong)(yong)國(guo)內自行設計的型(xing)組件，具有(you)結構緊湊，檢(jian)修方便(bian)，線(xian)路方案可以靈活組合等(deng)特(te)點(dian)。配電(dian)(dian)箱(xiang)(xiang)除裝(zhuang)(zhuang)有(you)空氣斷路器(qi)(qi)和(he)(he)熔斷器(qi)(qi)作(zuo)(zuo)為短路保護外，還裝(zhuang)(zhuang)有(you)接觸器(qi)(qi)和(he)(he)熱繼(ji)電(dian)(dian)器(qi)(qi)，箱(xiang)(xiang)前門可裝(zhuang)(zhuang)操作(zuo)(zuo)按鈕和(he)(he)指示燈。