單相(xiang)(xiang)有(you)功電(dian)(dian)(dian)度(du)(du)表（簡(jian)稱：單相(xiang)(xiang)電(dian)(dian)(dian)度(du)(du)表）由接(jie)線(xian)(xian)端(duan)子(zi)(zi)(zi)、電(dian)(dian)(dian)流(liu)線(xian)(xian)圈(quan)、電(dian)(dian)(dian)壓線(xian)(xian)圈(quan)、計量轉(zhuan)盤(pan)、計數器(qi)構成，只(zhi)要電(dian)(dian)(dian)流(liu)線(xian)(xian)圈(quan)通過電(dian)(dian)(dian)流(liu)，同時電(dian)(dian)(dian)壓線(xian)(xian)圈(quan)加有(you)電(dian)(dian)(dian)壓，轉(zhuan)盤(pan)就受到電(dian)(dian)(dian)磁力而轉(zhuan)動……單相(xiang)(xiang)電(dian)(dian)(dian)度(du)(du)表共有(you)5個(ge)接(jie)線(xian)(xian)端(duan)子(zi)(zi)(zi)，其中有(you)兩個(ge)端(duan)子(zi)(zi)(zi)在表的(de)內部用連片短接(jie)，所以，單相(xiang)(xiang)電(dian)(dian)(dian)度(du)(du)表的(de)外接(jie)端(duan)子(zi)(zi)(zi)只(zhi)有(you)4個(ge)，即1、2、3、4號端(duan)子(zi)(zi)(zi)。由于電(dian)(dian)(dian)度(du)(du)表的(de)型(xing)號不同，各(ge)類型(xing)的(de)電(dian)(dian)(dian)表在鉛封蓋(gai)內都有(you)4各(ge)端(duan)子(zi)(zi)(zi)的(de)接(jie)線(xian)(xian)圖。

家用電表接線原理圖如下：

直接接入法：

如果負載的功率在(zai)電(dian)度(du)表允許(xu)的范圍內，即流(liu)過電(dian)度(du)表電(dian)流(liu)線圈的電(dian)流(liu)不至于導致(zhi)線圈燒毀，那么就采用直接(jie)接(jie)入(ru)法(fa)。

單相電度表共有四個接線端子，從左至右按1、2、3、4編(bian)號(hao)。

接線(xian)(xian)(xian)(xian)(xian)一(yi)般(ban)有兩(liang)種(zhong)一(yi)般(ban)是1、3接進(jin)線(xian)(xian)(xian)(xian)(xian)，2、4接出(chu)線(xian)(xian)(xian)(xian)(xian)；另一(yi)種(zhong)是按1、2接進(jin)線(xian)(xian)(xian)(xian)(xian)，3、4接出(chu)線(xian)(xian)(xian)(xian)(xian)。無(wu)論何(he)種(zhong)接法，相線(xian)(xian)(xian)(xian)(xian)（火線(xian)(xian)(xian)(xian)(xian)）必(bi)須接入電表(biao)(biao)的(de)電流線(xian)(xian)(xian)(xian)(xian)圈的(de)端子。由于有些電表(biao)(biao)的(de)接線(xian)(xian)(xian)(xian)(xian)特殊，具(ju)體的(de)接線(xian)(xian)(xian)(xian)(xian)方法需要(yao)參照接線(xian)(xian)(xian)(xian)(xian)端子蓋板上(shang)的(de)接線(xian)(xian)(xian)(xian)(xian)圖去(qu)接。

經互感器接入法：

在用(yong)單(dan)相(xiang)電(dian)度表(biao)測(ce)量大電(dian)流的單(dan)相(xiang)電(dian)路的用(yong)電(dian)量時(shi)，應使用(yong)電(dian)流互(hu)感器(qi)進行電(dian)流變換，電(dian)流互(hu)感器(qi)接電(dian)度表(biao)的電(dian)流線圈(quan)。接法有兩種(zhong)：

（1）單相電度表內5和1端未斷開時的接(jie)法(fa)。

由于(yu)表內短接片(pian)沒有(you)斷開(kai)，所以互感器的K2端(duan)子禁(jin)止(zhi)接地。

以上就是(shi)電表(biao)(biao)的接法(fa)，以及家(jia)用(yong)(yong)電表(biao)(biao)接線圖。小(xiao)編提醒(xing)大家(jia)，家(jia)用(yong)(yong)電表(biao)(biao)在接線的時(shi)候要(yao)注(zhu)意安全(quan)哦！