箱式變(bian)電(dian)(dian)(dian)(dian)站=高(gao)壓(ya)(ya)開關柜(ju)+變(bian)壓(ya)(ya)器+低壓(ya)(ya)開關柜(ju)， 就好象是(shi)1座變(bian)電(dian)(dian)(dian)(dian)所(suo)(suo)被做(zuo)在“集(ji)裝箱”里(li)。 至于要(yao)不要(yao)配(pei)備(bei)(bei)發(fa)電(dian)(dian)(dian)(dian)機(ji)，要(yao)看建(jian)筑(zhu)物的供電(dian)(dian)(dian)(dian)類(lei)別(bie)和箱式變(bian)電(dian)(dian)(dian)(dian)站系統是(shi)否是(shi)雙電(dian)(dian)(dian)(dian)源(yuan)供電(dian)(dian)(dian)(dian)等因素。 [補充] 從節能方(fang)面，長距傳輸(shu)用(yong)(yong)(yong)高(gao)壓(ya)(ya)，用(yong)(yong)(yong)電(dian)(dian)(dian)(dian)端用(yong)(yong)(yong)低壓(ya)(ya)。 變(bian)壓(ya)(ya)器變(bian)電(dian)(dian)(dian)(dian)所(suo)(suo)是(shi)常用(yong)(yong)(yong)供電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)源(yuan)（市電(dian)(dian)(dian)(dian)），發(fa)電(dian)(dian)(dian)(dian)機(ji)是(shi)因工程需要(yao)而(er)選用(yong)(yong)(yong)的，常作為(wei)[備(bei)(bei)用(yong)(yong)(yong)]電(dian)(dian)(dian)(dian)源(yuan)。 重(zhong)要(yao)負荷：1主電(dian)(dian)(dian)(dian)源(yuan)+1備(bei)(bei)電(dian)(dian)(dian)(dian)源(yuan)+備(bei)(bei)用(yong)(yong)(yong)發(fa)電(dian)(dian)(dian)(dian)機(ji)組（或蓄電(dian)(dian)(dian)(dian)池(chi)組） 一般民用(yong)(yong)(yong)建(jian)筑(zhu)：多采用(yong)(yong)(yong)1主+1備(bei)(bei)。
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