這類開關柜采用鋼板制成封閉外殼，重慶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，美式箱變哪家好構成(cheng)能(neng)完成(cheng)某一(yi)類(lei)供電(dian)(dian)任務的(de)(de)功(gong)能(neng)單(dan)元(yuan)(yuan)。功(gong)能(neng)單(dan)元(yuan)(yuan)與(yu)母線(xian)(xian)或(huo)(huo)電(dian)(dian)纜(lan)(lan)之間，用接地的(de)(de)金屬板(ban)或(huo)(huo)塑(su)料制(zhi)成(cheng)的(de)(de)功(gong)能(neng)板(ban)隔開(kai)，形成(cheng)母線(xian)(xian)、功(gong)能(neng)單(dan)元(yuan)(yuan)和(he)電(dian)(dian)纜(lan)(lan)三(san)個(ge)區域(yu)。每(mei)個(ge)功(gong)能(neng)單(dan)元(yuan)(yuan)之間也(ye)有(you)隔離措施。抽屜式開(kai)關(guan)柜(ju)有(you)較(jiao)(jiao)高(gao)(gao)的(de)(de)可靠性、安全(quan)性和(he)互(hu)換性，是(shi)比較(jiao)(jiao)先進的(de)(de)開(kai)關(guan)柜(ju)，開(kai)關(guan)柜(ju)多數(shu)是(shi)指抽屜式開(kai)關(guan)柜(ju)。它們適用于要求供電(dian)(dian)可靠性較(jiao)(jiao)高(gao)(gao)的(de)(de)工礦企業、高(gao)(gao)層(ceng)建筑，作為集中(zhong)控(kong)制(zhi)的(de)(de)配電(dian)(dian)中(zhong)心。

電(dian)(dian)動(dong)汽(qi)車(che)充電(dian)(dian)樁作為(wei)電(dian)(dian)動(dong)汽(qi)車(che)的能(neng)量補給(gei)裝置，其充電(dian)(dian)性能(neng)關系到(dao)電(dian)(dian)池組的使用壽命、充電(dian)(dian)時間。這也(ye)是消費者在購買(mai)電(dian)(dian)動(dong)汽(qi)車(che)之(zhi)前(qian)最為(wei)關心的一個方面之(zhi)一。實現對動(dong)力電(dian)(dian)池快速(su)、高效、安全(quan)、合(he)理的電(dian)(dian)量補給(gei)是電(dian)(dian)動(dong)汽(qi)車(che)充電(dian)(dian)器設計(ji)的基本原(yuan)則，另外，還要考(kao)慮(lv)充電(dian)(dian)器對各種動(dong)力電(dian)(dian)池的適用性。

用軟刷或吹風清除屏板(ban)插件和全部(bu)電(dian)(dian)磁開關(guan)零件的(de)積塵,并檢查(cha)控制柜內(nei)電(dian)(dian)器開關(guan)觸頭的(de)狀態(tai),接(jie)觸情(qing)況,線圈外表的(de)絕(jue)緣(yuan)以及(ji)機械部(bu)件的(de)動作(zuo)是否可靠,更換熔絲時(shi),應使熔斷電(dian)(dian)流(liu)與該回路的(de)電(dian)(dian)流(liu)相(xiang)匹配。

在(zai)一(yi)條(tiao)距離(li)比較長(chang)的(de)線(xian)(xian)路(lu)上有多根小面(mian)積(ji)電(dian)纜(lan)(lan)往(wang)(wang)往(wang)(wang)會造成電(dian)纜(lan)(lan)使(shi)用(yong)(yong)浪費，于是在(zai)出(chu)線(xian)(xian)到(dao)用(yong)(yong)電(dian)負荷中(zhong)，往(wang)(wang)往(wang)(wang)使(shi)用(yong)(yong)主(zhu)干大電(dian)纜(lan)(lan)出(chu)線(xian)(xian)，然(ran)后在(zai)接近(jin)負荷的(de)時候，使(shi)用(yong)(yong)電(dian)纜(lan)(lan)分支箱將(jiang)主(zhu)干電(dian)纜(lan)(lan)分成若干小面(mian)積(ji)，電(dian)纜(lan)(lan)，由小面(mian)積(ji)電(dian)纜(lan)(lan)接入負荷。這樣的(de)接線(xian)(xian)方式廣泛用(yong)(yong)于城市電(dian)網中(zhong)的(de)路(lu)燈等(deng)供(gong)電(dian)、小用(yong)(yong)戶(hu)供(gong)電(dian)。

配(pei)電(dian)箱(xiang)中(zhong)的(de)(de)(de)低壓電(dian)器(qi)，由(you)熔斷器(qi)、交流(liu)接觸器(qi)、剩(sheng)余電(dian)流(liu)動作保護(hu)器(qi)、電(dian)容器(qi)及(ji)計量表等組成。周(zhou)圍空(kong)(kong)氣(qi)溫度(du)的(de)(de)(de)上限(xian)(xian)不超過40℃；周(zhou)圍空(kong)(kong)氣(qi)溫度(du)24h的(de)(de)(de)平均(jun)值不超過35℃；周(zhou)圍空(kong)(kong)氣(qi)溫度(du)的(de)(de)(de)下限(xian)(xian)不低于-5℃或-25℃。農(nong)網改造的(de)(de)(de)配(pei)電(dian)箱(xiang)在室外運行(xing)，它不但受到(dao)(dao)陽(yang)光(guang)的(de)(de)(de)直(zhi)接照射產生(sheng)高(gao)溫，同時運行(xing)中(zhong)自(zi)身也會產生(sheng)熱量，所以在盛(sheng)夏高(gao)溫季節，箱(xiang)體內的(de)(de)(de)溫度(du)將會達到(dao)(dao)60℃以上，這時的(de)(de)(de)溫度(du)大大超過了這些電(dian)器(qi)規定的(de)(de)(de)環境溫度(du)