這類開關柜采用鋼板制成封閉外殼，文山美式箱變進出線回路的電器元件都安裝在可抽出的抽屜中，美式箱變廠家構成(cheng)能(neng)完成(cheng)某一(yi)類供(gong)電(dian)任務的(de)功(gong)能(neng)單元(yuan)。功(gong)能(neng)單元(yuan)與母線(xian)(xian)或電(dian)纜(lan)之間，用接地的(de)金屬板或塑料制成(cheng)的(de)功(gong)能(neng)板隔開(kai)，形成(cheng)母線(xian)(xian)、功(gong)能(neng)單元(yuan)和(he)電(dian)纜(lan)三個區域。每個功(gong)能(neng)單元(yuan)之間也(ye)有隔離措施。抽屜(ti)式開(kai)關(guan)柜有較高(gao)的(de)可靠性(xing)、安全性(xing)和(he)互換(huan)性(xing)，是(shi)比較先進的(de)開(kai)關(guan)柜，開(kai)關(guan)柜多(duo)數是(shi)指抽屜(ti)式開(kai)關(guan)柜。它們適(shi)用于要求供(gong)電(dian)可靠性(xing)較高(gao)的(de)工礦企(qi)業、高(gao)層建筑，作為集中控制的(de)配電(dian)中心。

充電(dian)機內印(yin)刷線路板、 接插件等電(dian)路應進行(xing)防(fang)(fang)潮濕、防(fang)(fang)霉(mei)變、防(fang)(fang)鹽(yan)霧(wu)處(chu)理，其中(zhong)防(fang)(fang)鹽(yan)霧(wu)腐(fu)蝕能(neng)力滿足 GB/T 4797.6-1995《電(dian)工電(dian)子產品自然(ran)環境條(tiao)件 塵(chen)、沙(sha)、鹽(yan)霧(wu)》中(zhong)表9的要求(qiu)，使(shi)充電(dian)機能(neng)在室外潮濕、含鹽(yan)霧(wu)的環境下正常運行(xing)。

1、柜門(men)離(li)地(di)25mm、2.5mm厚(hou)的(de)(de)安(an)(an)裝(zhuang)(zhuang)板(ban)，兩邊(bian)有20mm寬的(de)(de)U形(xing)彎邊(bian)，使(shi)得安(an)(an)裝(zhuang)(zhuang)板(ban)強度(du)更大，也便于搬運(yun)。2、箱底三(san)(san)塊電(dian)纜(lan)導(dao)入(ru)蓋板(ban)，可(ke)(ke)以相互替換(huan)，移(yi)動(dong)方便，易于導(dao)入(ru)電(dian)纜(lan)，易于開(kai)孔進線。3、箱門(men)上有接地(di)螺栓5、承重(zhong)鉸(jiao)鏈安(an)(an)裝(zhuang)(zhuang)容(rong)易，換(huan)柜門(men)也容(rong)易。柜門(men)可(ke)(ke)開(kai)啟130°。4、塑料滑引(yin)器可(ke)(ke)利用(yong)塑料滑引(yin)器通過導(dao)軌，可(ke)(ke)從柜體正(zheng)面將安(an)(an)裝(zhuang)(zhuang)板(ban)推入(ru)柜內7、堅固的(de)(de)長方形(xing)框(kuang)架不但可(ke)(ke)以加強前(qian)門(men)的(de)(de)強度(du)，還可(ke)(ke)以用(yong)來固定(ding)安(an)(an)裝(zhuang)(zhuang)電(dian)器元件(jian)（配(pei)(pei)合(he)門(men)安(an)(an)裝(zhuang)(zhuang)橫(heng)條使(shi)用(yong)）。5、背板(ban)能很容(rong)易地(di)安(an)(an)裝(zhuang)(zhuang)，用(yong)螺絲固定(ding)；還可(ke)(ke)換(huan)裝(zhuang)(zhuang)柜門(men)。6、標配(pei)(pei)MS821鎖(suo)，上、中、下三(san)(san)點鎖(suo)緊柜門(men)。7、密(mi)(mi)封(feng)圈：聚氨(an)脂發泡密(mi)(mi)封(feng)膠(jiao)條，確保(bao)防(fang)護等(deng)級。

在一條距(ju)離比較長的(de)線路上有多根小面積電(dian)(dian)(dian)纜往(wang)往(wang)會造成(cheng)電(dian)(dian)(dian)纜使用(yong)(yong)(yong)(yong)浪費，于(yu)(yu)是(shi)在出線到用(yong)(yong)(yong)(yong)電(dian)(dian)(dian)負(fu)荷中，往(wang)往(wang)使用(yong)(yong)(yong)(yong)主干大電(dian)(dian)(dian)纜出線，然(ran)后(hou)在接(jie)近(jin)負(fu)荷的(de)時候(hou)，使用(yong)(yong)(yong)(yong)電(dian)(dian)(dian)纜分支箱將主干電(dian)(dian)(dian)纜分成(cheng)若干小面積，電(dian)(dian)(dian)纜，由小面積電(dian)(dian)(dian)纜接(jie)入負(fu)荷。這樣的(de)接(jie)線方(fang)式廣泛用(yong)(yong)(yong)(yong)于(yu)(yu)城市電(dian)(dian)(dian)網中的(de)路燈(deng)等供電(dian)(dian)(dian)、小用(yong)(yong)(yong)(yong)戶供電(dian)(dian)(dian)。

電(dian)(dian)(dian)動(dong)汽車充電(dian)(dian)(dian)樁作為電(dian)(dian)(dian)動(dong)汽車的(de)(de)能(neng)量(liang)補(bu)給(gei)裝置，其充電(dian)(dian)(dian)性能(neng)關系到電(dian)(dian)(dian)池組的(de)(de)使用壽命、充電(dian)(dian)(dian)時(shi)間。這也(ye)是(shi)消費者(zhe)在購(gou)買電(dian)(dian)(dian)動(dong)汽車之前(qian)最(zui)為關心的(de)(de)一個方面之一。實現對(dui)動(dong)力電(dian)(dian)(dian)池快速、高(gao)效、安全、合理的(de)(de)電(dian)(dian)(dian)量(liang)補(bu)給(gei)是(shi)電(dian)(dian)(dian)動(dong)汽車充電(dian)(dian)(dian)器設(she)計的(de)(de)基(ji)本原(yuan)則，另外，還(huan)要考慮充電(dian)(dian)(dian)器對(dui)各種動(dong)力電(dian)(dian)(dian)池的(de)(de)適用性。