玻璃鋼表箱和配電箱他們(men)有(you)較大的(de)(de)(de)差(cha)(cha)別，不(bu)(bu)但應用(yong)(yong)不(bu)(bu)一(yi)樣的(de)(de)(de)輸(shu)出功(gong)率，并且功(gong)能和(he)作用(yong)(yong)也不(bu)(bu)一(yi)樣，下(xia)邊實際表(biao)(biao)明(ming)：玻璃鋼(gang)(gang)表(biao)(biao)箱(xiang)一(yi)般(ban)是220v的(de)(de)(de)民(min)用(yong)(yong)型配(pei)(pei)(pei)電(dian)(dian)(dian)(dian)(dian)。 配(pei)(pei)(pei)電(dian)(dian)(dian)(dian)(dian)箱(xiang)一(yi)般(ban)為(wei)(wei)380V配(pei)(pei)(pei)電(dian)(dian)(dian)(dian)(dian)。 全是弱電(dian)(dian)(dian)(dian)(dian)。 一(yi)個開關電(dian)(dian)(dian)(dian)(dian)源箱(xiang)沒有(you)中(zhong)(zhong)性(xing)YJV22(3150。 195)SC100，說195是地(di)線(xian)(xian)(xian)(xian)(xian)，沒有(you)中(zhong)(zhong)性(xing)線(xian)(xian)(xian)(xian)(xian)。 自然3150是A，B，C三(san)(san)(san)相(xiang)(xiang)(xiang)。 別人說195是中(zhong)(zhong)性(xing)的(de)(de)(de)？ 那(nei)麼驅(qu)動(dong)力玻璃鋼(gang)(gang)表(biao)(biao)箱(xiang)和(he)配(pei)(pei)(pei)電(dian)(dian)(dian)(dian)(dian)箱(xiang)有(you)什么不(bu)(bu)同(tong)呢？ 中(zhong)(zhong)性(xing)線(xian)(xian)(xian)(xian)(xian)：從變電(dian)(dian)(dian)(dian)(dian)器(qi)(qi)的(de)(de)(de)中(zhong)(zhong)性(xing)點引出的(de)(de)(de)線(xian)(xian)(xian)(xian)(xian)稱(cheng)為(wei)(wei)中(zhong)(zhong)性(xing)線(xian)(xian)(xian)(xian)(xian)。 并聯接到變電(dian)(dian)(dian)(dian)(dian)器(qi)(qi)周邊的(de)(de)(de)地(di)線(xian)(xian)(xian)(xian)(xian)上(shang)。 則中(zhong)(zhong)性(xing)線(xian)(xian)(xian)(xian)(xian)與地(di)線(xian)(xian)(xian)(xian)(xian)是同(tong)一(yi)條線(xian)(xian)(xian)(xian)(xian)，即一(yi)般(ban)三(san)(san)(san)相(xiang)(xiang)(xiang)四線(xian)(xian)(xian)(xian)(xian)制(zhi)中(zhong)(zhong)的(de)(de)(de)零(ling)(ling)線(xian)(xian)(xian)(xian)(xian)。 由于地(di)球上(shang)從變電(dian)(dian)(dian)(dian)(dian)器(qi)(qi)部位到用(yong)(yong)戶有(you)較大的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)阻器(qi)(qi)。因(yin)此用(yong)(yong)戶家里(li)的(de)(de)(de)中(zhong)(zhong)性(xing)線(xian)(xian)(xian)(xian)(xian)是零(ling)(ling)線(xian)(xian)(xian)(xian)(xian)，并不(bu)(bu)是零(ling)(ling)電(dian)(dian)(dian)(dian)(dian)位差(cha)(cha)，那(nei)不(bu)(bu)是地(di)線(xian)(xian)(xian)(xian)(xian)。 為(wei)(wei)了更好地(di)安全性(xing)聯接用(yong)(yong)戶家里(li)的(de)(de)(de)另一(yi)根(gen)地(di)線(xian)(xian)(xian)(xian)(xian)（引入地(di)線(xian)(xian)(xian)(xian)(xian)通常在用(yong)(yong)戶周邊），產生三(san)(san)(san)相(xiang)(xiang)(xiang)五(wu)線(xian)(xian)(xian)(xian)(xian)制(zhi)，即三(san)(san)(san)相(xiang)(xiang)(xiang)線(xian)(xian)(xian)(xian)(xian)加(jia)一(yi)條中(zhong)(zhong)性(xing)線(xian)(xian)(xian)(xian)(xian)，加(jia)一(yi)根(gen)地(di)線(xian)(xian)(xian)(xian)(xian)。 例如：YJV22（3150195）SC100，表(biao)(biao)明(ming)195為(wei)(wei)零(ling)(ling)，為(wei)(wei)中(zhong)(zhong)性(xing)。 自然3150是A，B，C三(san)(san)(san)相(xiang)(xiang)(xiang)。 以維護用(yong)(yong)戶自身的(de)(de)(de)地(di)線(xian)(xian)(xian)(xian)(xian)。 即三(san)(san)(san)相(xiang)(xiang)(xiang)五(wu)線(xian)(xian)(xian)(xian)(xian)制(zhi)。 玻璃鋼(gang)(gang)表(biao)(biao)箱(xiang)一(yi)般(ban)為(wei)(wei)220v的(de)(de)(de)土建工程配(pei)(pei)(pei)電(dian)(dian)(dian)(dian)(dian)。 民(min)用(yong)(yong)型用(yong)(yong)電(dian)(dian)(dian)(dian)(dian)量選用(yong)(yong)單(dan)相(xiang)(xiang)(xiang)(220V)，有(you)時候也選用(yong)(yong)三(san)(san)(san)相(xiang)(xiang)(xiang)四線(xian)(xian)(xian)(xian)(xian)。 配(pei)(pei)(pei)電(dian)(dian)(dian)(dian)(dian)箱(xiang)一(yi)般(ban)為(wei)(wei)380V配(pei)(pei)(pei)電(dian)(dian)(dian)(dian)(dian)。 三(san)(san)(san)相(xiang)(xiang)(xiang)四五(wu)線(xian)(xian)(xian)(xian)(xian)。