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？

是用(yong)(yong)三(san)(san)(san)(san)(san)(san)相(xiang)(xiang)三(san)(san)(san)(san)(san)(san)線(xian)(xian)(xian)(xian)(xian)制(zhi)還是用(yong)(yong)三(san)(san)(san)(san)(san)(san)相(xiang)(xiang)四(si)線(xian)(xian)(xian)(xian)(xian)制(zhi)的電表，由用(yong)(yong)戶(hu)的進線(xian)(xian)(xian)(xian)(xian)和(he)用(yong)(yong)電性質決定。 如(ru)果用(yong)(yong)戶(hu)是純三(san)(san)(san)(san)(san)(san)相(xiang)(xiang)制(zhi)電器(qi)(qi)，如(ru)三(san)(san)(san)(san)(san)(san)相(xiang)(xiang)變壓(ya)器(qi)(qi)，三(san)(san)(san)(san)(san)(san)相(xiang)(xiang)電動機等，可以使用(yong)(yong)三(san)(san)(san)(san)(san)(san)相(xiang)(xiang)三(san)(san)(san)(san)(san)(san)線(xian)(xian)(xian)(xian)(xian)制(zhi)線(xian)(xian)(xian)(xian)(xian)路(lu)，三(san)(san)(san)(san)(san)(san)相(xiang)(xiang)三(san)(san)(san)(san)(san)(san)線(xian)(xian)(xian)(xian)(xian)制(zhi)只(zhi)有三(san)(san)(san)(san)(san)(san)根線(xian)(xian)(xian)(xian)(xian)，沒有零(ling)線(xian)(xian)(xian)(xian)(xian)，就只(zhi)能(neng)用(yong)(yong)三(san)(san)(san)(san)(san)(san)相(xiang)(xiang)三(san)(san)(san)(san)(san)(san)線(xian)(xian)(xian)(xian)(xian)制(zhi)的表。 如(ru)果用(yong)(yong)戶(hu)有單相(xiang)(xiang)負(fu)荷又(you)有三(san)(san)(san)(san)(san)(san)相(xiang)(xiang)負(fu)荷，那(nei)就是三(san)(san)(san)(san)(san)(san)相(xiang)(xiang)四(si)線(xian)(xian)(xian)(xian)(xian)制(zhi)或三(san)(san)(san)(san)(san)(san)相(xiang)(xiang)五線(xian)(xian)(xian)(xian)(xian)制(zhi)（多(duo)零(ling)線(xian)(xian)(xian)(xian)(xian)接地線(xian)(xian)(xian)(xian)(xian)）線(xian)(xian)(xian)(xian)(xian)路(lu)，就要(yao)使用(yong)(yong)三(san)(san)(san)(san)(san)(san)相(xiang)(xiang)四(si)線(xian)(xian)(xian)(xian)(xian)制(zhi)的電表。 三(san)(san)(san)(san)(san)(san)相(xiang)(xiang)三(san)(san)(san)(san)(san)(san)線(xian)(xian)(xian)(xian)(xian)制(zhi)線(xian)(xian)(xian)(xian)(xian)路(lu)沒有調整能(neng)力，要(yao)求(qiu)三(san)(san)(san)(san)(san)(san)相(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(san)相四線(xian)比三(san)相三(san)線(xian)多(duo)了一根電(dian)源中性線(xian)，三(san)相三(san)線(xian)只能提(ti)(ti)供(gong)(gong)380伏電(dian)壓(ya)的電(dian)源，三(san)相四線(xian)既可以提(ti)(ti)供(gong)(gong)380伏電(dian)壓(ya)、又可以提(ti)(ti)供(gong)(gong)220伏電(dian)壓(ya)的電(dian)源。

三(san)相(xiang)三(san)線，明(ming)顯省錢(qian)了，但負載不平衡時(shi)候無法通過零相(xiang)回饋電流，容易燒東(dong)西了，而三(san)相(xiang)四線可(ke)以解決這個問題

三相三線制,三相四線制,三相五線制各有什么優點

三(san)(san)相三(san)(san)線制(zhi)就是只用三(san)(san)根相線

三相四線(xian)制就是三根相線(xian)加一根零(ling)線(xian)

三相五線(xian)制就是三根相線(xian)加一根零(ling)線(xian)再(zai)加一根保護接地線(xian)

三相三線制和三相四線制電機（動力馬達）有什么區別？

三相電機(ji)是(shi)平衡負(fu)載，相電流(liu)等于(yu)線(xian)電流(liu)，矢量和為零，所以不需要零線(xian)，角形(xing)接法的(de)電機(ji)是(shi)沒(mei)(mei)有(you)零線(xian)可(ke)接的(de)，星形(xing)接法可(ke)以在中性點接零線(xian)，但沒(mei)(mei)有(you)意義(yi)，接或不接都是(shi)一樣的(de)。

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)三(san)線制供(gong)電(dian)系統，只(zhi)適用于三(san)相(xiang)對(dui)稱(cheng)負(fu)荷(he)(如三(san)相(xiang)電(dian)力變壓(ya)器，三(san)相(xiang)電(dian)機(ji)等)，若三(san)相(xiang)負(fu)荷(he)不對(dui)稱(cheng)，中(zhong)性(xing)(xing)點(dian)就(jiu)會出(chu)現電(dian)壓(ya)。采用三(san)相(xiang)四線制供(gong)電(dian)系統，可以獲(huo)得線電(dian)壓(ya)和(he)相(xiang)電(dian)壓(ya)，對(dui)于使用者(zhe)比較方便。另外在三(san)相(xiang)負(fu)荷(he)不對(dui)稱(cheng)時(shi)，因中(zhong)性(xing)(xing)線阻抗(kang)很小(xiao)，也能消除(chu)中(zhong)性(xing)(xing)點(dian)的電(dian)壓(ya)位移。