三相三線電能表和三相四線電能表的區別

三相三線制和三相四線制是什么意思？各有什么區別？

是(shi)用(yong)(yong)(yong)三(san)(san)相(xiang)(xiang)(xiang)(xiang)(xiang)三(san)(san)線(xian)(xian)(xian)制(zhi)(zhi)(zhi)還是(shi)用(yong)(yong)(yong)三(san)(san)相(xiang)(xiang)(xiang)(xiang)(xiang)四(si)線(xian)(xian)(xian)制(zhi)(zhi)(zhi)的電(dian)表(biao)，由用(yong)(yong)(yong)戶(hu)的進線(xian)(xian)(xian)和用(yong)(yong)(yong)電(dian)性(xing)質(zhi)決定。 如(ru)果(guo)(guo)用(yong)(yong)(yong)戶(hu)是(shi)純三(san)(san)相(xiang)(xiang)(xiang)(xiang)(xiang)制(zhi)(zhi)(zhi)電(dian)器，如(ru)三(san)(san)相(xiang)(xiang)(xiang)(xiang)(xiang)變壓器，三(san)(san)相(xiang)(xiang)(xiang)(xiang)(xiang)電(dian)動機(ji)等，可以使用(yong)(yong)(yong)三(san)(san)相(xiang)(xiang)(xiang)(xiang)(xiang)三(san)(san)線(xian)(xian)(xian)制(zhi)(zhi)(zhi)線(xian)(xian)(xian)路(lu)(lu)(lu)，三(san)(san)相(xiang)(xiang)(xiang)(xiang)(xiang)三(san)(san)線(xian)(xian)(xian)制(zhi)(zhi)(zhi)只有(you)三(san)(san)根線(xian)(xian)(xian)，沒(mei)有(you)零線(xian)(xian)(xian)，就只能用(yong)(yong)(yong)三(san)(san)相(xiang)(xiang)(xiang)(xiang)(xiang)三(san)(san)線(xian)(xian)(xian)制(zhi)(zhi)(zhi)的表(biao)。 如(ru)果(guo)(guo)用(yong)(yong)(yong)戶(hu)有(you)單相(xiang)(xiang)(xiang)(xiang)(xiang)負(fu)荷又有(you)三(san)(san)相(xiang)(xiang)(xiang)(xiang)(xiang)負(fu)荷，那就是(shi)三(san)(san)相(xiang)(xiang)(xiang)(xiang)(xiang)四(si)線(xian)(xian)(xian)制(zhi)(zhi)(zhi)或三(san)(san)相(xiang)(xiang)(xiang)(xiang)(xiang)五線(xian)(xian)(xian)制(zhi)(zhi)(zhi)（多(duo)零線(xian)(xian)(xian)接地線(xian)(xian)(xian)）線(xian)(xian)(xian)路(lu)(lu)(lu)，就要使用(yong)(yong)(yong)三(san)(san)相(xiang)(xiang)(xiang)(xiang)(xiang)四(si)線(xian)(xian)(xian)制(zhi)(zhi)(zhi)的電(dian)表(biao)。 三(san)(san)相(xiang)(xiang)(xiang)(xiang)(xiang)三(san)(san)線(xian)(xian)(xian)制(zhi)(zhi)(zhi)線(xian)(xian)(xian)路(lu)(lu)(lu)沒(mei)有(you)調整能力，要求三(san)(san)相(xiang)(xiang)(xiang)(xiang)(xiang)負(fu)荷基本平衡。

三相三線制和三相四線制的區別是什么?應用場所有哪些不同

三相(xiang)(xiang)四線(xian)(xian)比三相(xiang)(xiang)三線(xian)(xian)多了一根電源(yuan)(yuan)中性線(xian)(xian)，三相(xiang)(xiang)三線(xian)(xian)只能提(ti)(ti)供(gong)(gong)380伏電壓的(de)(de)電源(yuan)(yuan)，三相(xiang)(xiang)四線(xian)(xian)既可以提(ti)(ti)供(gong)(gong)380伏電壓、又(you)可以提(ti)(ti)供(gong)(gong)220伏電壓的(de)(de)電源(yuan)(yuan)。

三(san)相(xiang)(xiang)三(san)線，明(ming)顯省錢了(le)，但負載不平(ping)衡時候無法通過零相(xiang)(xiang)回饋電流，容易燒東西(xi)了(le)，而三(san)相(xiang)(xiang)四(si)線可以(yi)解決這個問題

三相三線制,三相四線制,三相五線制各有什么優點

三(san)相(xiang)三(san)線(xian)制就是只用三(san)根相(xiang)線(xian)

三相四線(xian)制就是三根相線(xian)加一根零線(xian)

三(san)相五線(xian)制就是三(san)根(gen)相線(xian)加一根(gen)零線(xian)再加一根(gen)保護(hu)接(jie)地線(xian)

三相三線制和三相四線制電機（動力馬達）有什么區別？

三相(xiang)電(dian)(dian)機(ji)是(shi)平衡(heng)負載，相(xiang)電(dian)(dian)流(liu)等于線電(dian)(dian)流(liu)，矢(shi)量和為零(ling)，所以(yi)不需要零(ling)線，角形(xing)接法(fa)(fa)的電(dian)(dian)機(ji)是(shi)沒(mei)有(you)零(ling)線可接的，星形(xing)接法(fa)(fa)可以(yi)在中(zhong)性點接零(ling)線，但沒(mei)有(you)意義，接或(huo)不接都(dou)是(shi)一樣的。

在低壓供電系統中，三相四線制較三相三線制的適用范圍是什么?有何優點?

三(san)相(xiang)(xiang)三(san)線制(zhi)供電(dian)(dian)系統，只適用(yong)于三(san)相(xiang)(xiang)對稱(cheng)負荷(如三(san)相(xiang)(xiang)電(dian)(dian)力變壓器，三(san)相(xiang)(xiang)電(dian)(dian)機(ji)等)，若(ruo)三(san)相(xiang)(xiang)負荷不對稱(cheng)，中(zhong)性點(dian)就會出現電(dian)(dian)壓。采用(yong)三(san)相(xiang)(xiang)四線制(zhi)供電(dian)(dian)系統，可(ke)以獲(huo)得線電(dian)(dian)壓和相(xiang)(xiang)電(dian)(dian)壓，對于使用(yong)者比較方便。另外(wai)在三(san)相(xiang)(xiang)負荷不對稱(cheng)時，因中(zhong)性線阻抗很小，也能消除(chu)中(zhong)性點(dian)的電(dian)(dian)壓位移。