施工用電配電系統應設置總配電箱、分配電箱、開關箱，并按照“總-分-開”順序作分級設置，并形成“三級配電”模式。專業高壓開關柜施工用配電系統各配電箱、開關箱的安裝位置要合理。高壓開關柜廠家總配電(dian)箱要盡量靠近變壓器(qi)或外電(dian)源處，以便電(dian)源的(de)引(yin)入。分配電(dian)箱應(ying)盡量安裝(zhuang)(zhuang)在用電(dian)設備或負荷相(xiang)對集(ji)中的(de)中心地帶，確保三相(xiang)負荷保持平衡。開(kai)關箱安裝(zhuang)(zhuang)的(de)位置應(ying)視現場(chang)情況和(he)工況盡量靠近其控制的(de)用電(dian)設備。

指除安裝面外(wai)，其(qi)它所有(you)側面都被(bei)封閉起來(lai)的一種(zhong)(zhong)低壓開(kai)關(guan)柜(ju)(ju)。這種(zhong)(zhong)柜(ju)(ju)子的開(kai)關(guan)、保護和(he)監(jian)測控制(zhi)等電(dian)氣元(yuan)件，均安裝在一個(ge)用(yong)鋼或絕(jue)緣(yuan)(yuan)材料制(zhi)成(cheng)的封閉外(wai)殼內(nei)，可靠墻(qiang)(qiang)或離(li)墻(qiang)(qiang)安裝。柜(ju)(ju)內(nei)每條回路之間可以不加隔離(li)措施，也可以采用(yong)接地的金屬(shu)板或絕(jue)緣(yuan)(yuan)板進行隔離(li)。通常門與主開(kai)關(guan)操作(zuo)(zuo)有(you)機械聯鎖。另外(wai)還有(you)防護式臺型開(kai)關(guan)柜(ju)(ju)（即控制(zhi)臺）】面板上(shang)裝有(you)控制(zhi)、測量、信號等電(dian)器。防護式開(kai)關(guan)柜(ju)(ju)主要用(yong)作(zuo)(zuo)工藝現場的配電(dian)裝置。

暗裝配電(dian)箱(xiang)(xiang)，配電(dian)箱(xiang)(xiang)嵌入墻內(nei)(nei)安裝，在砌墻時(shi)預留孔洞(dong)應比配電(dian)箱(xiang)(xiang)的長和寬各(ge)大20mm左右，預留的深(shen)度為(wei)配電(dian)箱(xiang)(xiang)厚度加上洞(dong)內(nei)(nei)壁抹灰的厚度。在圬埋配電(dian)箱(xiang)(xiang)時(shi)，箱(xiang)(xiang)體與(yu)墻之間填以混凝土即可把箱(xiang)(xiang)體固定(ding)住。

隨著電(dian)(dian)力電(dian)(dian)子技(ji)(ji)術(shu)和(he)變(bian)流(liu)(liu)(liu)控制技(ji)(ji)術(shu)的(de)(de)飛速(su)發展，高精(jing)度可控變(bian)流(liu)(liu)(liu)技(ji)(ji)術(shu)的(de)(de)成熟(shu)和(he)普(pu)及，分(fen)階(jie)段恒(heng)(heng)流(liu)(liu)(liu)充(chong)(chong)(chong)(chong)電(dian)(dian)模(mo)式(shi)已經基本被充(chong)(chong)(chong)(chong)電(dian)(dian)電(dian)(dian)流(liu)(liu)(liu)和(he)充(chong)(chong)(chong)(chong)電(dian)(dian)電(dian)(dian)壓(ya)連續變(bian)化的(de)(de)恒(heng)(heng)壓(ya)限(xian)(xian)(xian)流(liu)(liu)(liu)充(chong)(chong)(chong)(chong)電(dian)(dian)模(mo)式(shi)取代。主導充(chong)(chong)(chong)(chong)電(dian)(dian)工藝的(de)(de)還是恒(heng)(heng)壓(ya)限(xian)(xian)(xian)流(liu)(liu)(liu)充(chong)(chong)(chong)(chong)電(dian)(dian)模(mo)式(shi)。接(jie)觸式(shi)充(chong)(chong)(chong)(chong)電(dian)(dian)的(de)(de)最(zui)大問題在(zai)于(yu)它(ta)的(de)(de)安全性和(he)通(tong)用(yong)性。為(wei)了(le)使它(ta)滿足嚴(yan)格的(de)(de)安全充(chong)(chong)(chong)(chong)電(dian)(dian)標準，必須在(zai)電(dian)(dian)路(lu)上采用(yong)許(xu)多措施使充(chong)(chong)(chong)(chong)電(dian)(dian)設備(bei)能夠在(zai)各種環(huan)境下安全充(chong)(chong)(chong)(chong)電(dian)(dian)，恒(heng)(heng)壓(ya)限(xian)(xian)(xian)流(liu)(liu)(liu)充(chong)(chong)(chong)(chong)電(dian)(dian)和(he)分(fen)階(jie)段恒(heng)(heng)流(liu)(liu)(liu)充(chong)(chong)(chong)(chong)電(dian)(dian)均屬于(yu)接(jie)觸式(shi)充(chong)(chong)(chong)(chong)電(dian)(dian)技(ji)(ji)術(shu)。新型(xing)的(de)(de)電(dian)(dian)動汽(qi)車(che)感應(ying)充(chong)(chong)(chong)(chong)電(dian)(dian)技(ji)(ji)術(shu)發展很(hen)快。