由于大連配電箱的(de)用(yong)電(dian)(dian)負荷(he)主要(yao)是(shi)感性負載(zai).所以,要(yao)求電(dian)(dian)柜內(nei)斷(duan)路(lu)器(qi)(開關)的(de)瞬(shun)時過(guo)載(zai)能力要(yao)強,滅弧性能要(yao)好,接通(tong)的(de)可靠性要(yao)高。照明配(pei)電(dian)(dian)箱是(shi)將剩余電(dian)(dian)流動作保(bao)護器(qi)和空氣斷(duan)路(lu)器(qi)等在其內(nei)部合理組(zu)合裝(zhuang)配(pei)起(qi)來，從而實(shi)現(xian)對家(jia)庭(ting)電(dian)(dian)源集中 控制，以及接地、過(guo)載(zai)、短路(lu)等保(bao)護功能的(de)基礎配(pei)電(dian)(dian)裝(zhuang)置(zhi)。

    低壓(ya)(ya)(ya)大(da)連配(pei)電(dian)(dian)(dian)箱(xiang)只是(shi)(shi)在配(pei)電(dian)(dian)(dian)系統中相(xiang)對高壓(ya)(ya)(ya)輸(shu)電(dian)(dian)(dian)系統而言,我國電(dian)(dian)(dian)壓(ya)(ya)(ya)標(biao)準是(shi)(shi)三相(xiang)四(si)線(xian)(xian)400V(供(gong)電(dian)(dian)(dian)線(xian)(xian)電(dian)(dian)(dian)壓(ya)(ya)(ya))單相(xiang)是(shi)(shi)230V(供(gong)電(dian)(dian)(dian)的相(xiang)電(dian)(dian)(dian)壓(ya)(ya)(ya)),用電(dian)(dian)(dian)器(qi)電(dian)(dian)(dian)壓(ya)(ya)(ya)標(biao)準是(shi)(shi)：三相(xiang)四(si)線(xian)(xian)380V,單相(xiang)用電(dian)(dian)(dian)器(qi)電(dian)(dian)(dian)壓(ya)(ya)(ya)標(biao)準是(shi)(shi)：220V。供(gong)電(dian)(dian)(dian)電(dian)(dian)(dian)壓(ya)(ya)(ya)比用電(dian)(dian)(dian)電(dian)(dian)(dian)壓(ya)(ya)(ya)略高,是(shi)(shi)考慮(lv)到低壓(ya)(ya)(ya)供(gong)電(dian)(dian)(dian)統線(xian)(xian)路(lu)的損耗。

    大連配電箱進線開關具有過流及短(duan)路脫(tuo)扣(kou)功(gong)能(neng)，可(ke)選(xuan)配自動合(he)閘(zha)機構，或(huo)選(xuan)用有重(zhong)合(he)閘(zha)功(gong)能(neng)的斷路器，實現(xian)遠方遙控送電功(gong)能(neng)。饋電開關選(xuan)用待剩余電流保護功(gong)能(neng)的塑殼(ke)斷路器。