結構特點

XL-21型低壓動力配(pei)電(dian)(dian)箱(xiang)系封閉式，外殼用鋼(gang)板(ban)彎制(zhi)而成，刀開關操(cao)作(zuo)手(shou)柄于(yu)箱(xiang)前右柱上部(bu)，可(ke)以作(zuo)為(wei)切換電(dian)(dian)源之用。配(pei)電(dian)(dian)箱(xiang)前面裝(zhuang)有(you)一只電(dian)(dian)壓表(biao)，指示匯流母線的電(dian)(dian)壓。配(pei)電(dian)(dian)箱(xiang)前面有(you)門(men)(men)，門(men)(men)打開后，配(pei)電(dian)(dian)箱(xiang)內全部(bu)設備敞露、便于(yu)檢(jian)修維護。本配(pei)電(dian)(dian)箱(xiang)均采用國內自行設計(ji)的型組件，具有(you)結構緊湊(cou)，檢(jian)修方便，線路(lu)方案可(ke)以靈活組合等特點。配(pei)電(dian)(dian)箱(xiang)除(chu)裝(zhuang)有(you)空氣(qi)斷路(lu)器(qi)和熔斷器(qi)作(zuo)為(wei)短路(lu)保(bao)護外，還裝(zhuang)有(you)接觸(chu)器(qi)和熱(re)繼電(dian)(dian)器(qi)，箱(xiang)前門(men)(men)可(ke)裝(zhuang)操(cao)作(zuo)按(an)鈕和指示燈。