指(zhi)除安裝面(mian)(mian)外，其它所有(you)側面(mian)(mian)都被封(feng)閉(bi)起來的(de)一種低(di)壓開(kai)關(guan)(guan)柜(ju)。這種柜(ju)子的(de)開(kai)關(guan)(guan)、保護和監測(ce)控(kong)制(zhi)(zhi)等(deng)電氣(qi)元件(jian)，均安裝在一個(ge)用(yong)(yong)鋼或(huo)(huo)絕緣材料制(zhi)(zhi)成的(de)封(feng)閉(bi)外殼(ke)內(nei)，可靠墻或(huo)(huo)離(li)墻安裝。柜(ju)內(nei)每(mei)條(tiao)回路之間(jian)可以不加隔(ge)離(li)措施，也(ye)可以采用(yong)(yong)接地的(de)金(jin)屬(shu)板(ban)或(huo)(huo)絕緣板(ban)進行隔(ge)離(li)。通常門與主(zhu)開(kai)關(guan)(guan)操作有(you)機械聯鎖。另(ling)外還(huan)有(you)防護式(shi)臺型(xing)開(kai)關(guan)(guan)柜(ju)（即控(kong)制(zhi)(zhi)臺）】面(mian)(mian)板(ban)上裝有(you)控(kong)制(zhi)(zhi)、測(ce)量(liang)、信(xin)號等(deng)電器。防護式(shi)開(kai)關(guan)(guan)柜(ju)主(zhu)要用(yong)(yong)作工藝現場(chang)的(de)配電裝置(zhi)。

施工用電(dian)(dian)配(pei)(pei)(pei)電(dian)(dian)系統應設置總配(pei)(pei)(pei)電(dian)(dian)箱(xiang)(xiang)、分(fen)(fen)配(pei)(pei)(pei)電(dian)(dian)箱(xiang)(xiang)、開關(guan)箱(xiang)(xiang)，并按照“總-分(fen)(fen)-開”順序作分(fen)(fen)級(ji)設置，并形成(cheng)“三級(ji)配(pei)(pei)(pei)電(dian)(dian)”模式。施工用配(pei)(pei)(pei)電(dian)(dian)系統各配(pei)(pei)(pei)電(dian)(dian)箱(xiang)(xiang)、開關(guan)箱(xiang)(xiang)的安裝(zhuang)位置要合(he)理(li)。總配(pei)(pei)(pei)電(dian)(dian)箱(xiang)(xiang)要盡量靠(kao)近變壓器(qi)或外電(dian)(dian)源(yuan)處，以便電(dian)(dian)源(yuan)的引入。分(fen)(fen)配(pei)(pei)(pei)電(dian)(dian)箱(xiang)(xiang)應盡量安裝(zhuang)在(zai)用電(dian)(dian)設備(bei)或負荷相對集中的中心地帶，確保(bao)三相負荷保(bao)持平衡。開關(guan)箱(xiang)(xiang)安裝(zhuang)的位置應視現場(chang)情況和工況盡量靠(kao)近其控制(zhi)的用電(dian)(dian)設備(bei)。

昨日一大早，專業充電樁焦作供電公司的維修人員便來到塔北路農貿市場，充電樁廠家在(zai)架設(she)(she)過(guo)低的(de)(de)配電箱(xiang)周圍拉(la)起警戒線，動用叉車等機械，對存在(zai)安全隱(yin)患的(de)(de)配電箱(xiang)重(zhong)新架設(she)(she)。

配(pei)電(dian)(dian)(dian)(dian)變壓(ya)器的(de)(de)低(di)壓(ya)側(ce)總過(guo)(guo)流(liu)(liu)(liu)保(bao)(bao)護(hu)(hu)熔(rong)斷(duan)器的(de)(de)額(e)(e)定(ding)(ding)(ding)電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)，應大于配(pei)電(dian)(dian)(dian)(dian)變壓(ya)器的(de)(de)低(di)壓(ya)側(ce)額(e)(e)定(ding)(ding)(ding)電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)，一般取額(e)(e)定(ding)(ding)(ding)電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)的(de)(de)1.5倍，熔(rong)體(ti)的(de)(de)額(e)(e)定(ding)(ding)(ding)電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)應按(an)(an)變壓(ya)器允(yun)許(xu)的(de)(de)過(guo)(guo)負(fu)荷(he)倍數和熔(rong)斷(duan)器特性確定(ding)(ding)(ding)。出線回路過(guo)(guo)流(liu)(liu)(liu)保(bao)(bao)護(hu)(hu)熔(rong)斷(duan)器的(de)(de)熔(rong)體(ti)額(e)(e)定(ding)(ding)(ding)電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)，不(bu)應大于總過(guo)(guo)流(liu)(liu)(liu)保(bao)(bao)護(hu)(hu)熔(rong)斷(duan)器的(de)(de)額(e)(e)定(ding)(ding)(ding)電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)，熔(rong)體(ti)的(de)(de)額(e)(e)定(ding)(ding)(ding)電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)按(an)(an)回路正常最(zui)大負(fu)荷(he)電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)選(xuan)擇，并應躲過(guo)(guo)正常的(de)(de)尖(jian)峰電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)。