【單(dan)相電(dian)度(du)(du)(du)表(biao)】單(dan)相電(dian)度(du)(du)(du)表(biao)電(dian)的(de)(de)接線方法 單(dan)相電(dian)度(du)(du)(du)表(biao)的(de)(de)工作原(yuan)理

目前來說電度表是(shi)(shi)每家每戶(hu)必須安裝(zhuang)的(de)(de)(de)(de)，單(dan)(dan)相電(dian)度(du)表(biao)是(shi)(shi)電(dian)度(du)表(biao)的(de)(de)(de)(de)一(yi)種，是(shi)(shi)用來測量電(dian)能(neng)的(de)(de)(de)(de)儀(yi)表(biao)，又稱電(dian)度(du)表(biao)，火(huo)表(biao)，電(dian)能(neng)表(biao)，千瓦(wa)小(xiao)時表(biao)，指測量各種電(dian)學(xue)量的(de)(de)(de)(de)儀(yi)表(biao)。在(zai)生活中，很多人都(dou)會遇到不知道電(dian)表(biao)的(de)(de)(de)(de)接法(fa)這(zhe)樣的(de)(de)(de)(de)事，下(xia)(xia)面(mian)小(xiao)編就來為您(nin)講解下(xia)(xia)單(dan)(dan)相電(dian)度(du)表(biao)接線方法(fa)，一(yi)起來學(xue)習下(xia)(xia)吧(ba)。

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單相電度表知識介紹

單(dan)(dan)相(xiang)電(dian)(dian)(dian)度(du)(du)表是電(dian)(dian)(dian)度(du)(du)表的一種，電(dian)(dian)(dian)度(du)(du)表主要結構是由(you)電(dian)(dian)(dian)壓線圈、電(dian)(dian)(dian)流線圈、轉(zhuan)盤(pan)、轉(zhuan)軸、制動磁(ci)(ci)鐵、齒(chi)輪(lun)、計(ji)度(du)(du)器(qi)等(deng)組成(cheng)。單(dan)(dan)相(xiang)電(dian)(dian)(dian)表，則一般是民(min)用(yong)(yong)，接220V的設(she)備(bei)。電(dian)(dian)(dian)度(du)(du)表是利用(yong)(yong)電(dian)(dian)(dian)壓和電(dian)(dian)(dian)流線圈在鋁盤(pan)上產生的渦(wo)流與交(jiao)變磁(ci)(ci)通(tong)(tong)相(xiang)互作用(yong)(yong)產生電(dian)(dian)(dian)磁(ci)(ci)力(li)，使鋁盤(pan)轉(zhuan)動，同時引入制動力(li)矩，使鋁盤(pan)轉(zhuan)速與負載功率(lv)成(cheng)正(zheng)比，通(tong)(tong)過(guo)軸向(xiang)齒(chi)輪(lun)傳(chuan)動，由(you)計(ji)度(du)(du)器(qi)積算出轉(zhuan)盤(pan)轉(zhuan)數而(er)測定出電(dian)(dian)(dian)能。

單相電度表工作原理：

當(dang)電(dian)(dian)度表(biao)接入被(bei)測電(dian)(dian)路后，被(bei)測電(dian)(dian)路電(dian)(dian)壓(ya)U加在電(dian)(dian)壓(ya)線圈上，在其鐵(tie)芯中(zhong)形(xing)成一(yi)(yi)(yi)個(ge)交變的(de)磁(ci)通(tong)，這(zhe)個(ge)磁(ci)通(tong)的(de)一(yi)(yi)(yi)部(bu)分ΦU由(you)回磁(ci)極穿過(guo)(guo)鋁(lv)盤到回到電(dian)(dian)壓(ya)線圈的(de)鐵(tie)芯中(zhong);同理，被(bei)測電(dian)(dian)路電(dian)(dian)流(liu)I通(tong)過(guo)(guo)電(dian)(dian)流(liu)線圈后，也要在電(dian)(dian)流(liu)線圈的(de)U形(xing)鐵(tie)芯中(zhong)形(xing)成一(yi)(yi)(yi)個(ge)交變磁(ci)通(tong)Φi，這(zhe)個(ge)磁(ci)通(tong)由(you)U形(xing)成鐵(tie)芯的(de)一(yi)(yi)(yi)端由(you)下至上穿過(guo)(guo)鋁(lv)盤，然后又由(you)上至下穿過(guo)(guo)鋁(lv)盤回到U形(xing)鐵(tie)芯的(de)另一(yi)(yi)(yi)端。

其中(zhong)回磁(ci)板4是(shi)由(you)鋼板沖制而(er)成的(de)(de)，它的(de)(de)下(xia)端伸入鋁(lv)盤(pan)(pan)(pan)(pan)下(xia)部，與隔著鋁(lv)盤(pan)(pan)(pan)(pan)和電(dian)壓部件的(de)(de)鐵(tie)芯柱相對(dui)應(ying)(ying)，以便構成電(dian)壓線圈工作(zuo)磁(ci)通(tong)(tong)的(de)(de)回路。由(you)于穿(chuan)(chuan)過鋁(lv)盤(pan)(pan)(pan)(pan)的(de)(de)兩個磁(ci)通(tong)(tong)是(shi)交流(liu)磁(ci)通(tong)(tong)，而(er)且是(shi)在(zai)不(bu)同位(wei)置穿(chuan)(chuan)過鋁(lv)盤(pan)(pan)(pan)(pan)，因此就在(zai)各(ge)自(zi)穿(chuan)(chuan)過鋁(lv)盤(pan)(pan)(pan)(pan)的(de)(de)位(wei)置附(fu)近產生感應(ying)(ying)渦流(liu)，兩個磁(ci)通(tong)(tong)與這些(xie)渦流(liu)的(de)(de)相互作(zuo)用(yong)，便在(zai)鋁(lv)盤(pan)(pan)(pan)(pan)上(shang)產生推動(dong)(dong)鋁(lv)盤(pan)(pan)(pan)(pan)轉(zhuan)動(dong)(dong)的(de)(de)轉(zhuan)動(dong)(dong)力矩。

單相電度表接線方法：

電(dian)度表的接線方法(fa)有(you)兩種：跳入式接法(fa)和順入式接法(fa);

這兩(liang)種接線方法(fa)從表(biao)面上看不(bu)大一(yi)樣，其(qi)內部(bu)原理是相同的，即電(dian)(dian)流(liu)表(biao)的電(dian)(dian)流(liu)線圈串入(ru)負(fu)載回路中，而電(dian)(dian)壓線圈與負(fu)載并聯，兩(liang)個線圈的“*”端(duan)應(ying)接電(dian)(dian)源的同一(yi)極性端(duan)。一(yi)般單相電(dian)(dian)度表(biao)有專門的接線盒，打開(kai)盒蓋(gai)看到有四個接線端(duan)鈕，實(shi)際接線采用哪種方法(fa)，要(yao)根(gen)據電(dian)(dian)度表(biao)說明書中的規(gui)定(ding)進行。

在低壓(ya)(ya)小電(dian)流的(de)(de)單(dan)相電(dian)路中，電(dian)度表(biao)可以直(zhi)接接在線路上(shang)。若(ruo)負(fu)載(zai)電(dian)流很大或電(dian)壓(ya)(ya)很高，則應通過(guo)互(hu)感器(qi)才能接入電(dian)路。此時電(dian)流互(hu)感器(qi)的(de)(de)一(yi)次側與(yu)負(fu)載(zai)串聯，次級(ji)與(yu)電(dian)度表(biao)的(de)(de)電(dian)流線圈串聯，電(dian)壓(ya)(ya)互(hu)感器(qi)的(de)(de)初級(ji)與(yu)負(fu)載(zai)并聯，次級(ji)與(yu)電(dian)度表(biao)的(de)(de)電(dian)壓(ya)(ya)線圈并聯。

單相電度表使用方法

1、合理選擇電(dian)(dian)度表(biao)：一是(shi)根據任務選擇單相(xiang)(xiang)或三(san)相(xiang)(xiang)電(dian)(dian)度表(biao)。對于三(san)相(xiang)(xiang)電(dian)(dian)度表(biao)，應根據被(bei)測線路是(shi)三(san)相(xiang)(xiang)三(san)線制(zhi)還是(shi)三(san)相(xiang)(xiang)四線制(zhi)來(lai)選擇。二是(shi)額定(ding)電(dian)(dian)壓(ya)、電(dian)(dian)流(liu)的選擇，必須使(shi)負載電(dian)(dian)壓(ya)、電(dian)(dian)流(liu)等于或小于其額定(ding)值。

2、安裝電度表：電(dian)度(du)(du)表(biao)(biao)通(tong)常與(yu)配(pei)電(dian)裝(zhuang)(zhuang)(zhuang)置安(an)(an)裝(zhuang)(zhuang)(zhuang)在一起，而電(dian)度(du)(du)表(biao)(biao)應(ying)該安(an)(an)裝(zhuang)(zhuang)(zhuang)在配(pei)電(dian)裝(zhuang)(zhuang)(zhuang)置的(de)下方(fang)，其(qi)中(zhong)心距地面1.5~1.8米處;并列安(an)(an)裝(zhuang)(zhuang)(zhuang)多只電(dian)度(du)(du)表(biao)(biao)時(shi)，兩表(biao)(biao)間距不(bu)(bu)得小于200毫米;不(bu)(bu)同電(dian)價(jia)的(de)用(yong)電(dian)線路應(ying)該分別裝(zhuang)(zhuang)(zhuang)表(biao)(biao);同一電(dian)價(jia)的(de)用(yong)電(dian)線路應(ying)該合并裝(zhuang)(zhuang)(zhuang)表(biao)(biao);安(an)(an)裝(zhuang)(zhuang)(zhuang)電(dian)度(du)(du)表(biao)(biao)時(shi)，必須使(shi)表(biao)(biao)身與(yu)地面垂(chui)直，否(fou)則會影(ying)響其(qi)準確度(du)(du)。

3、正確接(jie)線(xian)(xian)(xian)：要根據(ju)說明(ming)書(shu)的要求和接(jie)線(xian)(xian)(xian)圖把進線(xian)(xian)(xian)和出線(xian)(xian)(xian)依次對(dui)號接(jie)在電(dian)度(du)表的出線(xian)(xian)(xian)頭上;接(jie)線(xian)(xian)(xian)時注(zhu)意電(dian)源的相序關系，特別是無功電(dian)度(du)表更(geng)要注(zhu)意相序;接(jie)線(xian)(xian)(xian)完畢后，要反(fan)復查對(dui)無誤后才(cai)能合(he)閘使用(yong)。