三相電多少伏電壓？是380V還是220V?380怎么接出220V?
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來源：金環宇電線發布(bu)日期(qi)：2019-09-27 16:16
三(san)相電(dian)(dian)(dian)首先是(shi)(shi)三(san)根線(xian)(xian)，并且是(shi)(shi)三(san)根火線(xian)(xian)，而(er)且他們因(yin)為是(shi)(shi)對稱(cheng)排列在發電(dian)(dian)(dian)機(ji)里(li)，所(suo)以他們之間(jian)(jian)(jian)的(de)(de)電(dian)(dian)(dian)角(jiao)(jiao)度是(shi)(shi)120度，我國規定用(yong)電(dian)(dian)(dian)標準是(shi)(shi)相對地電(dian)(dian)(dian)壓(ya)220伏，就是(shi)(shi)俗(su)稱(cheng)的(de)(de)相電(dian)(dian)(dian)壓(ya)，由此(ci)可計(ji)算出二根火線(xian)(xian)間(jian)(jian)(jian)的(de)(de)電(dian)(dian)(dian)壓(ya)，由于(yu)三(san)根火線(xian)(xian)之間(jian)(jian)(jian)的(de)(de)電(dian)(dian)(dian)角(jiao)(jiao)度是(shi)(shi)120度，而(er)火對地的(de)(de)電(dian)(dian)(dian)角(jiao)(jiao)度是(shi)(shi)90度，因(yin)此(ci)線(xian)(xian)電(dian)(dian)(dian)壓(ya)是(shi)(shi)相電(dian)(dian)(dian)壓(ya)的(de)(de)根號(hao)3倍，根號(hao)3的(de)(de)值是(shi)(shi)1.732.，220x1.732終等于(yu)380。
三相電多少伏電壓
三相電的相線和地線間電壓為380V，也就是相(xiang)線(xian)和零線(xian)間電(dian)(dian)壓(ya)為(wei)380V，三相(xiang)電(dian)(dian)的其中的一條火線(xian)和地線(xian)之間的電(dian)(dian)壓(ya)為(wei)220V。
三相電壓380怎么接出220V
三(san)相電是由(you)三(san)條火(huo)(huo)線(xian)(xian)和(he)一條零(ling)線(xian)(xian)組成(cheng)的(de)，三(san)條火(huo)(huo)線(xian)(xian)中(zhong)的(de)任(ren)何一條與零(ling)線(xian)(xian)的(de)電壓都(dou)是220V，所以家用電的(de)話只要從三(san)相電中(zhong)接(jie)出任(ren)意一條火(huo)(huo)線(xian)(xian)和(he)零(ling)線(xian)(xian)搭配起來就(jiu)可以了。
三相電(dian)壓(ya)380接出220V
三相電源與單相電源的區別
1、在單(dan)相正(zheng)弦交(jiao)(jiao)(jiao)(jiao)流(liu)(liu)(liu)電(dian)路中，單(dan)相交(jiao)(jiao)(jiao)(jiao)流(liu)(liu)(liu)電(dian)壓(ya)、單(dan)相交(jiao)(jiao)(jiao)(jiao)流(liu)(liu)(liu)電(dian)流(liu)(liu)(liu)和單(dan)相交(jiao)(jiao)(jiao)(jiao)流(liu)(liu)(liu)電(dian)動勢(shi)都是(shi)(shi)按照正(zheng)弦規(gui)律變(bian)化，也可以形象地(di)說(shuo)，三相交(jiao)(jiao)(jiao)(jiao)流(liu)(liu)(liu)電(dian)就(jiu)是(shi)(shi)三個單(dan)相交(jiao)(jiao)(jiao)(jiao)流(liu)(liu)(liu)電(dian)對電(dian)路的整體作用。
2、三(san)(san)相(xiang)(xiang)(xiang)(xiang)(xiang)交(jiao)流(liu)電(dian)(dian)(dian)有很(hen)多優(you)點：制造三(san)(san)相(xiang)(xiang)(xiang)(xiang)(xiang)交(jiao)流(liu)發電(dian)(dian)(dian)機、變壓器比單(dan)(dan)相(xiang)(xiang)(xiang)(xiang)(xiang)的節(jie)(jie)省(sheng)材料(liao)，而且構造簡單(dan)(dan)、性能(neng)優(you)良(liang);在同樣條件下(xia)輸送同樣大的功(gong)率時(shi)，三(san)(san)相(xiang)(xiang)(xiang)(xiang)(xiang)輸電(dian)(dian)(dian)線比單(dan)(dan)相(xiang)(xiang)(xiang)(xiang)(xiang)輸電(dian)(dian)(dian)線節(jie)(jie)省(sheng)有色金(jin)屬25%，電(dian)(dian)(dian)能(neng)損耗也少，三(san)(san)相(xiang)(xiang)(xiang)(xiang)(xiang)電(dian)(dian)(dian)動機比單(dan)(dan)相(xiang)(xiang)(xiang)(xiang)(xiang)電(dian)(dian)(dian)動機性能(neng)優(you)良(liang)，等等。
工廠或家庭裝修用線都需要用多少伏電壓的電線呢?
一般電(dian)線(xian)電(dian)纜廠家生產的電(dian)線(xian)電(dian)壓額定電(dian)壓標準(zhun)為(wei)300/500V及450/750V、0.6/1KV等(deng)都會(hui)大于220V及380V。國家規(gui)定民用(yong)電(dian)壓220V，工業常用(yong)的電(dian)是380V。那么(me)，我們在購買電(dian)線(xian)電(dian)纜時，只需要(yao)看(kan)下相應電(dian)線(xian)的額定電(dian)壓就行了(le)。
