箱式(shi)(shi)(shi)變(bian)(bian)(bian)(bian)電(dian)(dian)(dian)(dian)(dian)站(zhan)(zhan)，又叫預裝(zhuang)式(shi)(shi)(shi)變(bian)(bian)(bian)(bian)電(dian)(dian)(dian)(dian)(dian)所(suo)或(huo)預裝(zhuang)式(shi)(shi)(shi)變(bian)(bian)(bian)(bian)電(dian)(dian)(dian)(dian)(dian)站(zhan)(zhan)。是(shi)一(yi)種高(gao)壓(ya)開(kai)關設備、配(pei)(pei)電(dian)(dian)(dian)(dian)(dian)變(bian)(bian)(bian)(bian)壓(ya)器和(he)低壓(ya)配(pei)(pei)電(dian)(dian)(dian)(dian)(dian)裝(zhuang)置，按(an)一(yi)定(ding)接線方(fang)案排成一(yi)體(ti)的(de)工廠(chang)預制戶(hu)內、戶(hu)外緊湊(cou)式(shi)(shi)(shi)配(pei)(pei)電(dian)(dian)(dian)(dian)(dian)設備，即將變(bian)(bian)(bian)(bian)壓(ya)器降壓(ya)、低壓(ya)配(pei)(pei)電(dian)(dian)(dian)(dian)(dian)等功能有機(ji)地組(zu)合在一(yi)起，安裝(zhuang)在一(yi)個防(fang)潮、防(fang)銹(xiu)、防(fang)塵、防(fang)鼠、防(fang)火、防(fang)盜、隔(ge)熱、全封閉(bi)、可移動的(de)鋼結構箱，特(te)別(bie)適用(yong)于(yu)城網建設與改(gai)造，是(shi)繼(ji)土建變(bian)(bian)(bian)(bian)電(dian)(dian)(dian)(dian)(dian)站(zhan)(zhan)之后崛(jue)起的(de)一(yi)種嶄(zhan)新的(de)變(bian)(bian)(bian)(bian)電(dian)(dian)(dian)(dian)(dian)站(zhan)(zhan)。箱式(shi)(shi)(shi)變(bian)(bian)(bian)(bian)電(dian)(dian)(dian)(dian)(dian)站(zhan)(zhan)適用(yong)于(yu)礦山(shan)、工廠(chang)企業、油氣田和(he)風力發電(dian)(dian)(dian)(dian)(dian)站(zhan)(zhan)，它替(ti)代了原(yuan)有的(de)土建配(pei)(pei)電(dian)(dian)(dian)(dian)(dian)房，配(pei)(pei)電(dian)(dian)(dian)(dian)(dian)站(zhan)(zhan)，成為(wei)新型的(de)成套(tao)變(bian)(bian)(bian)(bian)配(pei)(pei)電(dian)(dian)(dian)(dian)(dian)裝(zhuang)置。

近年(nian)來，低壓供(gong)(gong)(gong)電(dian)的(de)負(fu)荷(he)密度不(bu)斷增大，對供(gong)(gong)(gong)電(dian)的(de)可靠性和質(zhi)量(liang)(liang)也提出了很(hen)高的(de)要(yao)求(qiu)。在(zai)這種情況下，如果(guo)以某(mou)一較大容量(liang)(liang)的(de)變(bian)電(dian)所為中心，以低壓向周圍的(de)用(yong)戶供(gong)(gong)(gong)電(dian)，將耗費大量(liang)(liang)的(de)有色金屬，電(dian)能損耗很(hen)大，還不(bu)能保證供(gong)(gong)(gong)電(dian)質(zhi)量(liang)(liang)。反之，如果(guo)以高電(dian)壓深入(ru)負(fu)荷(he)中心，在(zai)負(fu)荷(he)中心建(jian)變(bian)電(dian)所，就(jiu)能縮(suo)短低壓供(gong)(gong)(gong)電(dian)半徑，提高供(gong)(gong)(gong)電(dian)質(zhi)量(liang)(liang)，節(jie)約(yue)有色金屬，降低電(dian)能損耗。在(zai)負(fu)荷(he)中心最(zui)適宜(yi)建(jian)設箱式變(bian)電(dian)所。

高壓(ya)／低壓(ya)預裝箱式(shi)(shi)(shi)變(bian)電(dian)站(zhan)(所)也稱為箱式(shi)(shi)(shi)變(bian)電(dian)所或組(zu)合(he)(he)式(shi)(shi)(shi)變(bian)電(dian)所（組(zu)合(he)(he)箱式(shi)(shi)(shi)變(bian)電(dian)站(zhan)）、成套變(bian)電(dian)站(zhan)、可移(yi)動(dong)變(bian)電(dian)站(zhan)，產(chan)(chan)生(sheng)于二十世紀七(qi)十年代(dai)，國(guo)內已有若(ruo)干(gan)廠家生(sheng)產(chan)(chan)。其構造大體(ti)上是一個(ge)箱式(shi)(shi)(shi)結構，設有高壓(ya)開關小(xiao)室(shi)、變(bian)壓(ya)器(qi)小(xiao)室(shi)及(ji)(ji)低壓(ya)配(pei)出開關小(xiao)室(shi)三個(ge)部(bu)分(fen)，額定電(dian)壓(ya)為10、35kV，可安裝1600kVA及(ji)(ji)以下變(bian)壓(ya)器(qi)。其特點是：占地(di)面積小(xiao)；工(gong)廠化(hua)生(sheng)產(chan)(chan)、速度快、質量(liang)好；施工(gong)速度快，僅(jin)需現場施工(gong)基礎(chu)部(bu)分(fen)；外形美觀，能(neng)與住(zhu)宅小(xiao)區環境協調一致；適應性強，具有互換性，便于標(biao)準化(hua)、系列(lie)化(hua)；維護工(gong)作量(liang)小(xiao)，節約(yue)投資。

因此，箱式變電所無論國外、國內都受到重視與歡迎，可(ke)得到普遍地應用，是(shi)非常有前景的電氣設備，已被廣泛用于工廠、礦山、油(you)田、港口、機(ji)場、車站、城市(shi)公共(gong)建筑、集中住(zhu)宅區(qu)、機(ji)關單位、學校、商(shang)業大(da)廳和(he)地下設施等場所。

目前(qian)，國內各種不(bu)同型(xing)(xing)(xing)號的(de)組(zu)合(he)式(shi)(shi)(shi)(shi)變電站品種很(hen)多(duo)，其(qi)中包括戶外式(shi)(shi)(shi)(shi)、戶內式(shi)(shi)(shi)(shi)、全封(feng)閉(bi)型(xing)(xing)(xing)、半封(feng)閉(bi)型(xing)(xing)(xing)，帶走廊(lang)(lang)型(xing)(xing)(xing)、不(bu)帶走廊(lang)(lang)型(xing)(xing)(xing)，組(zu)合(he)式(shi)(shi)(shi)(shi)、固定式(shi)(shi)(shi)(shi)、裝置式(shi)(shi)(shi)(shi)，干式(shi)(shi)(shi)(shi)變壓(ya)(ya)器(qi)、油浸(jin)變壓(ya)(ya)器(qi)，終端供(gong)電、環網(wang)供(gong)電等，可(ke)適應(ying)不(bu)同用(yong)戶的(de)需要。高壓(ya)(ya)、變壓(ya)(ya)器(qi)、低壓(ya)(ya)三(san)室的(de)布(bu)置方式(shi)(shi)(shi)(shi)為目字形排列(lie)或(huo)品字形分隔(ge)方案(an)。高壓(ya)(ya)室設備元(yuan)件選用(yong)引(yin)進(jin)、國產或(huo)進(jin)口(kou)的(de)環網(wang)柜(ju)、負荷(he)開關加限(xian)流熔斷(duan)器(qi)、真空斷(duan)路器(qi)。低壓(ya)(ya)室由動力、照明、計量及無功補償柜(ju)構(gou)成。通風散熱(re)設有風扇(shan)、溫度(du)自(zi)動控制(zhi)器(qi)、防凝(ning)露控制(zhi)器(qi)。箱殼大都采用(yong)普(pu)通或(huo)熱(re)鍍(du)鋅鋼板(ban)、鋁合(he)金(jin)板(ban)，骨架用(yong)成型(xing)(xing)(xing)鋼焊接或(huo)用(yong)螺栓(shuan)連接。