【單相(xiang)電(dian)度表(biao)】單相(xiang)電(dian)度表(biao)電(dian)的接線方法 單相(xiang)電(dian)度表(biao)的工(gong)作原理

目前來說電度表是(shi)(shi)(shi)每(mei)家(jia)每(mei)戶必須安裝的(de)，單(dan)相電度表(biao)(biao)是(shi)(shi)(shi)電度表(biao)(biao)的(de)一種，是(shi)(shi)(shi)用來(lai)(lai)測量電能(neng)的(de)儀表(biao)(biao)，又稱電度表(biao)(biao)，火表(biao)(biao)，電能(neng)表(biao)(biao)，千瓦小(xiao)時表(biao)(biao)，指(zhi)測量各種電學(xue)量的(de)儀表(biao)(biao)。在生(sheng)活中，很多人都會遇(yu)到(dao)不知道電表(biao)(biao)的(de)接(jie)法(fa)這樣的(de)事，下(xia)(xia)面(mian)小(xiao)編就來(lai)(lai)為您(nin)講解下(xia)(xia)單(dan)相電度表(biao)(biao)接(jie)線方法(fa)，一起來(lai)(lai)學(xue)習下(xia)(xia)吧。

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單相電度表知識介紹

單(dan)相電度(du)(du)表(biao)(biao)是(shi)電度(du)(du)表(biao)(biao)的(de)(de)一種，電度(du)(du)表(biao)(biao)主(zhu)要結(jie)構是(shi)由(you)電壓線圈、電流線圈、轉(zhuan)盤(pan)、轉(zhuan)軸、制動磁鐵、齒輪、計度(du)(du)器等(deng)組成。單(dan)相電表(biao)(biao)，則一般是(shi)民用，接220V的(de)(de)設(she)備。電度(du)(du)表(biao)(biao)是(shi)利用電壓和電流線圈在(zai)鋁(lv)盤(pan)上產(chan)生(sheng)的(de)(de)渦流與(yu)交變磁通(tong)相互作(zuo)用產(chan)生(sheng)電磁力，使(shi)(shi)鋁(lv)盤(pan)轉(zhuan)動，同(tong)時引入制動力矩，使(shi)(shi)鋁(lv)盤(pan)轉(zhuan)速與(yu)負(fu)載功率成正比，通(tong)過軸向齒輪傳動，由(you)計度(du)(du)器積(ji)算(suan)出(chu)轉(zhuan)盤(pan)轉(zhuan)數而測定出(chu)電能(neng)。

單相電度表工作原理：

當電(dian)(dian)度表接入被測電(dian)(dian)路(lu)后，被測電(dian)(dian)路(lu)電(dian)(dian)壓(ya)(ya)U加(jia)在(zai)電(dian)(dian)壓(ya)(ya)線(xian)(xian)圈(quan)上，在(zai)其鐵(tie)(tie)(tie)(tie)芯中形(xing)成一(yi)(yi)個(ge)交變(bian)的磁通，這(zhe)個(ge)磁通的一(yi)(yi)部分(fen)ΦU由回磁極穿過(guo)鋁盤(pan)到回到電(dian)(dian)壓(ya)(ya)線(xian)(xian)圈(quan)的鐵(tie)(tie)(tie)(tie)芯中;同理，被測電(dian)(dian)路(lu)電(dian)(dian)流I通過(guo)電(dian)(dian)流線(xian)(xian)圈(quan)后，也要(yao)在(zai)電(dian)(dian)流線(xian)(xian)圈(quan)的U形(xing)鐵(tie)(tie)(tie)(tie)芯中形(xing)成一(yi)(yi)個(ge)交變(bian)磁通Φi，這(zhe)個(ge)磁通由U形(xing)成鐵(tie)(tie)(tie)(tie)芯的一(yi)(yi)端由下至(zhi)上穿過(guo)鋁盤(pan)，然(ran)后又由上至(zhi)下穿過(guo)鋁盤(pan)回到U形(xing)鐵(tie)(tie)(tie)(tie)芯的另一(yi)(yi)端。

其中回(hui)磁(ci)板(ban)4是(shi)由(you)鋼(gang)板(ban)沖制而成(cheng)的，它的下端(duan)伸入鋁(lv)盤(pan)(pan)(pan)(pan)下部(bu)，與隔(ge)著鋁(lv)盤(pan)(pan)(pan)(pan)和(he)電壓部(bu)件的鐵芯柱(zhu)相(xiang)對應，以便(bian)構成(cheng)電壓線圈工作磁(ci)通的回(hui)路。由(you)于穿(chuan)過(guo)(guo)鋁(lv)盤(pan)(pan)(pan)(pan)的兩個磁(ci)通是(shi)交流磁(ci)通，而且是(shi)在不(bu)同位置穿(chuan)過(guo)(guo)鋁(lv)盤(pan)(pan)(pan)(pan)，因此就在各自(zi)穿(chuan)過(guo)(guo)鋁(lv)盤(pan)(pan)(pan)(pan)的位置附近產(chan)生(sheng)感(gan)應渦(wo)流，兩個磁(ci)通與這些渦(wo)流的相(xiang)互作用，便(bian)在鋁(lv)盤(pan)(pan)(pan)(pan)上產(chan)生(sheng)推動鋁(lv)盤(pan)(pan)(pan)(pan)轉(zhuan)動的轉(zhuan)動力矩。

單相電度表接線方法：

電度(du)表(biao)的接線(xian)方法(fa)有兩(liang)種：跳入式接法(fa)和(he)順入式接法(fa);

這(zhe)兩(liang)種接(jie)(jie)線(xian)(xian)方法從表(biao)面上(shang)看不大一樣，其(qi)內部原理(li)是相同的(de)，即電(dian)流表(biao)的(de)電(dian)流線(xian)(xian)圈(quan)(quan)串入(ru)負(fu)載回路中(zhong)(zhong)，而電(dian)壓線(xian)(xian)圈(quan)(quan)與負(fu)載并聯，兩(liang)個線(xian)(xian)圈(quan)(quan)的(de)“*”端應接(jie)(jie)電(dian)源的(de)同一極性端。一般單相電(dian)度(du)表(biao)有專門的(de)接(jie)(jie)線(xian)(xian)盒，打開盒蓋看到有四個接(jie)(jie)線(xian)(xian)端鈕，實際接(jie)(jie)線(xian)(xian)采用哪種方法，要根據電(dian)度(du)表(biao)說明(ming)書(shu)中(zhong)(zhong)的(de)規定進行。

在低壓(ya)小電(dian)(dian)(dian)流(liu)的單(dan)相電(dian)(dian)(dian)路中，電(dian)(dian)(dian)度表(biao)可以直(zhi)接(jie)接(jie)在線(xian)路上。若負載(zai)電(dian)(dian)(dian)流(liu)很大(da)或電(dian)(dian)(dian)壓(ya)很高，則應通過(guo)互(hu)感(gan)(gan)器才能接(jie)入電(dian)(dian)(dian)路。此時(shi)電(dian)(dian)(dian)流(liu)互(hu)感(gan)(gan)器的一(yi)次(ci)(ci)側與負載(zai)串聯，次(ci)(ci)級(ji)(ji)與電(dian)(dian)(dian)度表(biao)的電(dian)(dian)(dian)流(liu)線(xian)圈(quan)串聯，電(dian)(dian)(dian)壓(ya)互(hu)感(gan)(gan)器的初級(ji)(ji)與負載(zai)并聯，次(ci)(ci)級(ji)(ji)與電(dian)(dian)(dian)度表(biao)的電(dian)(dian)(dian)壓(ya)線(xian)圈(quan)并聯。

單相電度表使用方法

1、合理選(xuan)擇電(dian)(dian)度表(biao)：一是(shi)(shi)(shi)根據任務選(xuan)擇單相或(huo)三(san)相電(dian)(dian)度表(biao)。對于(yu)(yu)三(san)相電(dian)(dian)度表(biao)，應根據被(bei)測線(xian)路是(shi)(shi)(shi)三(san)相三(san)線(xian)制(zhi)還是(shi)(shi)(shi)三(san)相四(si)線(xian)制(zhi)來(lai)選(xuan)擇。二(er)是(shi)(shi)(shi)額定(ding)電(dian)(dian)壓、電(dian)(dian)流(liu)的選(xuan)擇，必須使(shi)負載電(dian)(dian)壓、電(dian)(dian)流(liu)等于(yu)(yu)或(huo)小于(yu)(yu)其額定(ding)值。

2、安裝電度表：電(dian)度表通常(chang)與(yu)配(pei)電(dian)裝(zhuang)置安(an)裝(zhuang)在(zai)一(yi)起，而電(dian)度表應該安(an)裝(zhuang)在(zai)配(pei)電(dian)裝(zhuang)置的(de)下(xia)方，其中心距(ju)地面1.5~1.8米(mi)處(chu);并(bing)列安(an)裝(zhuang)多只電(dian)度表時，兩表間距(ju)不(bu)得(de)小于(yu)200毫(hao)米(mi);不(bu)同(tong)電(dian)價(jia)的(de)用電(dian)線(xian)路應該分別裝(zhuang)表;同(tong)一(yi)電(dian)價(jia)的(de)用電(dian)線(xian)路應該合并(bing)裝(zhuang)表;安(an)裝(zhuang)電(dian)度表時，必(bi)須使表身與(yu)地面垂(chui)直，否則(ze)會影響其準(zhun)確(que)度。

3、正確接(jie)線(xian)(xian)(xian)(xian)：要(yao)根據(ju)說(shuo)明書的要(yao)求(qiu)和接(jie)線(xian)(xian)(xian)(xian)圖(tu)把進線(xian)(xian)(xian)(xian)和出(chu)線(xian)(xian)(xian)(xian)依次(ci)對號接(jie)在電度表的出(chu)線(xian)(xian)(xian)(xian)頭上;接(jie)線(xian)(xian)(xian)(xian)時注意(yi)電源的相(xiang)序關(guan)系，特(te)別是無功(gong)電度表更要(yao)注意(yi)相(xiang)序;接(jie)線(xian)(xian)(xian)(xian)完畢后(hou)，要(yao)反復查對無誤后(hou)才能合閘使(shi)用。