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　　母(mu)線(xian)(xian)(xian)(xian)槽(cao)(cao)(cao)作為(wei)(wei)低(di)(di)壓(ya)(ya)(ya)(ya)(ya)(ya)進(jin)(jin)(jin)線(xian)(xian)(xian)(xian)時(shi)的(de)相(xiang)(xiang)位(wei)問題低(di)(di)壓(ya)(ya)(ya)(ya)(ya)(ya)配(pei)電(dian)柜采(cai)用(yong)母(mu)線(xian)(xian)(xian)(xian)槽(cao)(cao)(cao)作為(wei)(wei)進(jin)(jin)(jin)線(xian)(xian)(xian)(xian)連接，按有關規范要(yao)(yao)求(qiu)，三相(xiang)(xiang)母(mu)排(pai)的(de)排(pai)列(lie)(lie)方(fang)式按低(di)(di)壓(ya)(ya)(ya)(ya)(ya)(ya)配(pei)電(dian)柜型(xing)號(hao)以及(ji)生產廠(chang)家的(de)不(bu)同，大致可(ke)(ke)分為(wei)(wei)兩種：水平排(pai)列(lie)(lie)布(bu)置(zhi)(zhi)和(he)引(yin)(yin)下線(xian)(xian)(xian)(xian)的(de)排(pai)列(lie)(lie)布(bu)置(zhi)(zhi)，依(yi)此排(pai)列(lie)(lie)次序。從柜前(qian)看，水平排(pai)列(lie)(lie)布(bu)置(zhi)(zhi)從前(qian)到后為(wei)(wei)N、L3、L2，L1。引(yin)(yin)下線(xian)(xian)(xian)(xian)的(de)排(pai)列(lie)(lie)布(bu)置(zhi)(zhi)由(you)左到右為(wei)(wei)LI、L2、L3、N。另一方(fang)面，眾所周知，變(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)低(di)(di)壓(ya)(ya)(ya)(ya)(ya)(ya)套管排(pai)列(lie)(lie)次序為(wei)(wei)N、L1、L2、L3，變(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)在變(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)室內(nei)安裝按照設計要(yao)(yao)求(qiu)，一般高壓(ya)(ya)(ya)(ya)(ya)(ya)側(ce)向(xiang)內(nei)，低(di)(di)壓(ya)(ya)(ya)(ya)(ya)(ya)側(ce)向(xiang)外(wai)。當低(di)(di)壓(ya)(ya)(ya)(ya)(ya)(ya)配(pei)電(dian)柜進(jin)(jin)(jin)線(xian)(xian)(xian)(xian)母(mu)線(xian)(xian)(xian)(xian)采(cai)用(yong)水平布(bu)置(zhi)(zhi)時(shi)母(mu)線(xian)(xian)(xian)(xian)槽(cao)(cao)(cao)與變(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)之間不(bu)必換相(xiang)(xiang)，只需增加過(guo)渡(du)接片即可(ke)(ke)，但當低(di)(di)壓(ya)(ya)(ya)(ya)(ya)(ya)配(pei)電(dian)柜進(jin)(jin)(jin)線(xian)(xian)(xian)(xian)母(mu)線(xian)(xian)(xian)(xian)采(cai)用(yong)引(yin)(yin)下式布(bu)置(zhi)(zhi)時(shi)，由(you)于相(xiang)(xiang)位(wei)不(bu)同母(mu)線(xian)(xian)(xian)(xian)槽(cao)(cao)(cao)不(bu)能直接作為(wei)(wei)低(di)(di)壓(ya)(ya)(ya)(ya)(ya)(ya)進(jin)(jin)(jin)線(xian)(xian)(xian)(xian)連接變(bian)壓(ya)(ya)(ya)(ya)(ya)(ya)器(qi)(qi)和(he)低(di)(di)壓(ya)(ya)(ya)(ya)(ya)(ya)配(pei)電(dian)柜、因此母(mu)線(xian)(xian)(xian)(xian)槽(cao)(cao)(cao)要(yao)(yao)通過(guo)換相(xiang)(xiang)才能連接。