結構特點

XL-21型(xing)低壓(ya)(ya)動力配電(dian)箱(xiang)(xiang)(xiang)系(xi)封閉式，外(wai)殼(ke)用鋼板彎制而(er)成，刀開(kai)關操作(zuo)手柄于(yu)(yu)箱(xiang)(xiang)(xiang)前右柱(zhu)上部，可(ke)以作(zuo)為(wei)切(qie)換電(dian)源之(zhi)用。配電(dian)箱(xiang)(xiang)(xiang)前面(mian)裝(zhuang)有(you)一只(zhi)電(dian)壓(ya)(ya)表，指示(shi)匯流母線(xian)的電(dian)壓(ya)(ya)。配電(dian)箱(xiang)(xiang)(xiang)前面(mian)有(you)門(men)(men)(men)，門(men)(men)(men)打開(kai)后，配電(dian)箱(xiang)(xiang)(xiang)內全部設(she)備敞露、便(bian)于(yu)(yu)檢(jian)修(xiu)維護。本配電(dian)箱(xiang)(xiang)(xiang)均采用國(guo)內自行設(she)計的型(xing)組件，具有(you)結構(gou)緊湊，檢(jian)修(xiu)方便(bian)，線(xian)路(lu)(lu)方案可(ke)以靈活組合等(deng)特(te)點。配電(dian)箱(xiang)(xiang)(xiang)除(chu)裝(zhuang)有(you)空氣斷(duan)路(lu)(lu)器(qi)和(he)(he)熔斷(duan)器(qi)作(zuo)為(wei)短路(lu)(lu)保護外(wai)，還裝(zhuang)有(you)接觸器(qi)和(he)(he)熱繼電(dian)器(qi)，箱(xiang)(xiang)(xiang)前門(men)(men)(men)可(ke)裝(zhuang)操作(zuo)按鈕(niu)和(he)(he)指示(shi)燈。