結構(gou)特點

XL-21型(xing)低壓(ya)動力配電(dian)箱(xiang)(xiang)系封閉式，外(wai)殼用鋼(gang)板彎制而成，刀(dao)開關操(cao)作(zuo)手柄于(yu)箱(xiang)(xiang)前右柱上部，可以(yi)作(zuo)為切換電(dian)源(yuan)之用。配電(dian)箱(xiang)(xiang)前面裝(zhuang)有(you)一只(zhi)電(dian)壓(ya)表，指(zhi)示(shi)匯流母線(xian)(xian)的電(dian)壓(ya)。配電(dian)箱(xiang)(xiang)前面有(you)門，門打開后，配電(dian)箱(xiang)(xiang)內全部設(she)備(bei)敞露、便(bian)(bian)于(yu)檢修維護。本配電(dian)箱(xiang)(xiang)均采(cai)用國內自行設(she)計(ji)的型(xing)組件，具有(you)結構緊湊，檢修方(fang)便(bian)(bian)，線(xian)(xian)路方(fang)案可以(yi)靈活組合等特(te)點。配電(dian)箱(xiang)(xiang)除裝(zhuang)有(you)空氣斷路器(qi)(qi)(qi)和熔斷器(qi)(qi)(qi)作(zuo)為短路保(bao)護外(wai)，還裝(zhuang)有(you)接觸(chu)器(qi)(qi)(qi)和熱繼電(dian)器(qi)(qi)(qi)，箱(xiang)(xiang)前門可裝(zhuang)操(cao)作(zuo)按鈕和指(zhi)示(shi)燈。