結構(gou)特點

XL-21型低壓動力(li)配(pei)(pei)(pei)電(dian)(dian)箱系封閉式(shi)，外殼(ke)用(yong)鋼板(ban)彎制(zhi)而(er)成(cheng)，刀開關操作手(shou)柄(bing)于箱前右柱(zhu)上部，可(ke)以作為(wei)切換電(dian)(dian)源之用(yong)。配(pei)(pei)(pei)電(dian)(dian)箱前面裝(zhuang)有(you)一只電(dian)(dian)壓表，指示(shi)匯流母(mu)線(xian)的(de)電(dian)(dian)壓。配(pei)(pei)(pei)電(dian)(dian)箱前面有(you)門(men)，門(men)打開后，配(pei)(pei)(pei)電(dian)(dian)箱內(nei)全部設備敞露、便(bian)于檢修維護。本配(pei)(pei)(pei)電(dian)(dian)箱均采(cai)用(yong)國內(nei)自行設計的(de)型組(zu)件，具有(you)結構緊(jin)湊，檢修方便(bian)，線(xian)路方案可(ke)以靈活組(zu)合等特點。配(pei)(pei)(pei)電(dian)(dian)箱除(chu)裝(zhuang)有(you)空(kong)氣斷(duan)(duan)路器(qi)和熔斷(duan)(duan)器(qi)作為(wei)短路保護外，還裝(zhuang)有(you)接觸(chu)器(qi)和熱繼(ji)電(dian)(dian)器(qi)，箱前門(men)可(ke)裝(zhuang)操作按(an)鈕和指示(shi)燈。