玻璃鋼表箱和配電箱他們有(you)(you)較大的(de)(de)(de)差別(bie)，不但應用不一(yi)(yi)(yi)樣(yang)的(de)(de)(de)輸出(chu)功率，并且功能和(he)作用也不一(yi)(yi)(yi)樣(yang)，下邊(bian)實際(ji)表(biao)明：玻(bo)(bo)璃鋼表(biao)箱(xiang)(xiang)(xiang)一(yi)(yi)(yi)般(ban)是220v的(de)(de)(de)民用型(xing)配電(dian)(dian)(dian)(dian)。 配電(dian)(dian)(dian)(dian)箱(xiang)(xiang)(xiang)一(yi)(yi)(yi)般(ban)為(wei)380V配電(dian)(dian)(dian)(dian)。 全是弱電(dian)(dian)(dian)(dian)。 一(yi)(yi)(yi)個(ge)開關電(dian)(dian)(dian)(dian)源(yuan)箱(xiang)(xiang)(xiang)沒(mei)有(you)(you)中(zhong)性(xing)(xing)YJV22(3150。 195)SC100，說(shuo)195是地(di)(di)線(xian)(xian)(xian)(xian)(xian)，沒(mei)有(you)(you)中(zhong)性(xing)(xing)線(xian)(xian)(xian)(xian)(xian)。 自然3150是A，B，C三(san)(san)(san)(san)(san)相(xiang)。 別(bie)人說(shuo)195是中(zhong)性(xing)(xing)的(de)(de)(de)？ 那(nei)麼驅(qu)動力玻(bo)(bo)璃鋼表(biao)箱(xiang)(xiang)(xiang)和(he)配電(dian)(dian)(dian)(dian)箱(xiang)(xiang)(xiang)有(you)(you)什么不同(tong)呢？ 中(zhong)性(xing)(xing)線(xian)(xian)(xian)(xian)(xian)：從(cong)變(bian)電(dian)(dian)(dian)(dian)器(qi)(qi)的(de)(de)(de)中(zhong)性(xing)(xing)點引出(chu)的(de)(de)(de)線(xian)(xian)(xian)(xian)(xian)稱為(wei)中(zhong)性(xing)(xing)線(xian)(xian)(xian)(xian)(xian)。 并聯接到變(bian)電(dian)(dian)(dian)(dian)器(qi)(qi)周(zhou)邊(bian)的(de)(de)(de)地(di)(di)線(xian)(xian)(xian)(xian)(xian)上。 則(ze)中(zhong)性(xing)(xing)線(xian)(xian)(xian)(xian)(xian)與地(di)(di)線(xian)(xian)(xian)(xian)(xian)是同(tong)一(yi)(yi)(yi)條線(xian)(xian)(xian)(xian)(xian)，即(ji)一(yi)(yi)(yi)般(ban)三(san)(san)(san)(san)(san)相(xiang)四線(xian)(xian)(xian)(xian)(xian)制中(zhong)的(de)(de)(de)零(ling)線(xian)(xian)(xian)(xian)(xian)。 由于地(di)(di)球上從(cong)變(bian)電(dian)(dian)(dian)(dian)器(qi)(qi)部位(wei)(wei)到用戶(hu)有(you)(you)較大的(de)(de)(de)電(dian)(dian)(dian)(dian)阻器(qi)(qi)。因此用戶(hu)家里的(de)(de)(de)中(zhong)性(xing)(xing)線(xian)(xian)(xian)(xian)(xian)是零(ling)線(xian)(xian)(xian)(xian)(xian)，并不是零(ling)電(dian)(dian)(dian)(dian)位(wei)(wei)差，那(nei)不是地(di)(di)線(xian)(xian)(xian)(xian)(xian)。 為(wei)了更(geng)好地(di)(di)安全性(xing)(xing)聯接用戶(hu)家里的(de)(de)(de)另一(yi)(yi)(yi)根地(di)(di)線(xian)(xian)(xian)(xian)(xian)（引入地(di)(di)線(xian)(xian)(xian)(xian)(xian)通(tong)常(chang)在用戶(hu)周(zhou)邊(bian)），產生三(san)(san)(san)(san)(san)相(xiang)五線(xian)(xian)(xian)(xian)(xian)制，即(ji)三(san)(san)(san)(san)(san)相(xiang)線(xian)(xian)(xian)(xian)(xian)加(jia)一(yi)(yi)(yi)條中(zhong)性(xing)(xing)線(xian)(xian)(xian)(xian)(xian)，加(jia)一(yi)(yi)(yi)根地(di)(di)線(xian)(xian)(xian)(xian)(xian)。 例(li)如(ru)：YJV22（3150195）SC100，表(biao)明195為(wei)零(ling)，為(wei)中(zhong)性(xing)(xing)。 自然3150是A，B，C三(san)(san)(san)(san)(san)相(xiang)。 以維護(hu)用戶(hu)自身的(de)(de)(de)地(di)(di)線(xian)(xian)(xian)(xian)(xian)。 即(ji)三(san)(san)(san)(san)(san)相(xiang)五線(xian)(xian)(xian)(xian)(xian)制。 玻(bo)(bo)璃鋼表(biao)箱(xiang)(xiang)(xiang)一(yi)(yi)(yi)般(ban)為(wei)220v的(de)(de)(de)土建工程配電(dian)(dian)(dian)(dian)。 民用型(xing)用電(dian)(dian)(dian)(dian)量(liang)選(xuan)用單(dan)相(xiang)(220V)，有(you)(you)時(shi)候也選(xuan)用三(san)(san)(san)(san)(san)相(xiang)四線(xian)(xian)(xian)(xian)(xian)。 配電(dian)(dian)(dian)(dian)箱(xiang)(xiang)(xiang)一(yi)(yi)(yi)般(ban)為(wei)380V配電(dian)(dian)(dian)(dian)。 三(san)(san)(san)(san)(san)相(xiang)四五線(xian)(xian)(xian)(xian)(xian)。