三san相xiang電dian能neng表biao要yao按an正zheng相xiang序xu接jie線xian

，這zhe是shi很hen多duo人ren都dou忽hu略lve的de問wen題ti。因yin為wei三san相xiang電dian能neng表biao在zai校xiao驗yan是shi是shi按an正zheng相xiang序xu校xiao驗yan的de，如ru果guo在zai安an裝zhuang時shi錯cuo接jie相xiang序xu，將jiang會hui增zeng加jia附fu加jia誤wu差cha。 三相電能表接線 前qian不bu久jiu
，筆bi者zhe遇yu到dao一yi位wei開kai加jia工gong廠chang的de農nong村cun用yong戶hu反fan映ying
，自zi家jia的de低di壓ya三san相xiang四si線xian有you功gong電dian能neng表biao有you潛qian動dong現xian象xiang，這zhe段duan時shi間jian加jia工gong廠chang沒mei有you用yong電dian，電dian能neng表biao卻que仍reng然ran轉zhuan動dong
，但dan轉zhuan動dong不bu快kuai。根gen據ju該gai用yong戶hu反fan映ying的de情qing況kuang
，我wo們men對dui其qi電dian能neng表biao進jin行xing了le校xiao驗yan。電dian能neng表biao在zai運yun行xing或huo校xiao驗yan時shi，常chang會hui出chu現xian隻zhi加jia電dian壓ya而er負fu載zai電dian流liu為wei零ling時shi，表biao盤pan仍reng然ran連lian續xu旋xuan轉zhuan的de現xian象xiang，這zhe種zhong現xian象xiang稱cheng為wei電dian壓ya潛qian動dong，簡jian稱cheng為wei潛qian動dong。該gai用yong戶hu的de電dian能neng表biao為weiDT862/10(40)型(xing)
，而(er)校(xiao)驗(yan)結(jie)果(guo)表(biao)明(ming)該(gai)電(dian)能(neng)表(biao)合(he)格(ge)無(wu)潛(qian)動(dong)現(xian)象(xiang)，考(kao)慮(lv)可(ke)能(neng)是(shi)該(gai)用(yong)戶(hu)的(de)電(dian)能(neng)表(biao)出(chu)線(xian)老(lao)化(hua)破(po)損(sun)有(you)漏(lou)電(dian)問(wen)題(ti)。後(hou)到(dao)該(gai)用(yong)戶(hu)計(ji)量(liang)裝(zhuang)置(zhi)處(chu)檢(jian)查(zha)發(fa)現(xian)，電(dian)能(neng)表(biao)所(suo)有(you)進(jin)出(chu)線(xian)為(wei)新(xin)電(dian)纜(lan)線(xian)無(wu)破(po)損(sun)，故(gu)漏(lou)電(dian)的(de)可(ke)能(neng)性(xing)不(bu)大(da)。將(jiang)其(qi)電(dian)能(neng)表(biao)出(chu)線(xian)下(xia)側(ce)的(de)總(zong)開(kai)關(guan)拉(la)開(kai)，觀(guan)察(cha)電(dian)能(neng)表(biao)有(you)輕(qing)微(wei)的(de)蠕(ru)動(dong)，說(shuo)明(ming)該(gai)電(dian)能(neng)表(biao)潛(qian)動(dong)
，與(yu)校(xiao)驗(yan)結(jie)果(guo)相(xiang)反(fan)。後(hou)又(you)用(yong)萬(wan)用(yong)表(biao)及(ji)相(xiang)序(xu)表(biao)對(dui)電(dian)能(neng)表(biao)表(biao)頭(tou)接(jie)線(xian)測(ce)量(liang)檢(jian)查(zha)，各(ge)相(xiang)相(xiang)電(dian)壓(ya)對(dui)稱(cheng)正(zheng)常(chang)，但(dan)電(dian)壓(ya)相(xiang)序(xu)為(wei)逆(ni)相(xiang)序(xu)。將(jiang)電(dian)能(neng)表(biao)兩(liang)邊(bian)相(xiang)進(jin)線(xian)對(dui)調(tiao)改(gai)為(wei)正(zheng)相(xiang)序(xu)後(hou)，觀(guan)察(cha)電(dian)能(neng)表(biao)不(bu)再(zai)潛(qian)動(dong)。一(yi)個(ge)月(yue)後(hou)再(zai)詢(xun)問(wen)，該(gai)用(yong)戶(hu)反(fan)映(ying)電(dian)能(neng)表(biao)已(yi)無(wu)潛(qian)動(dong)現(xian)象(xiang)。
　　本(ben)例(li)是(shi)一(yi)種(zhong)因(yin)相(xiang)序(xu)接(jie)反(fan)而(er)致(zhi)使(shi)三(san)相(xiang)四(si)線(xian)電(dian)能(neng)表(biao)潛(qian)動(dong)的(de)錯(cuo)接(jie)線(xian)情(qing)況(kuang)。這(zhe)是(shi)因(yin)為(wei)在(zai)三(san)相(xiang)電(dian)能(neng)表(biao)中(zhong)，存(cun)在(zai)著(zhe)各(ge)相(xiang)元(yuan)件(jian)之(zhi)間(jian)的(de)漏(lou)磁(ci)通(tong)相(xiang)互(hu)作(zuo)用(yong)產(chan)生(sheng)的(de)附(fu)加(jia)力(li)矩(ju)
，還(hai)存(cun)在(zai)著(zhe)一(yi)組(zu)電(dian)磁(ci)元(yuan)件(jian)的(de)工(gong)作(zuo)磁(ci)通(tong)在(zai)轉(zhuan)盤(pan)中(zhong)產(chan)生(sheng)的(de)渦(wo)流(liu)，與(yu)另(ling)一(yi)組(zu)電(dian)磁(ci)元(yuan)件(jian)的(de)工(gong)作(zuo)磁(ci)通(tong)相(xiang)互(hu)作(zuo)用(yong)所(suo)產(chan)生(sheng)的(de)附(fu)加(jia)力(li)矩(ju)，它(ta)包(bao)括(kuo)電(dian)壓(ya)線(xian)圈(quan)一(yi)個(ge)磁(ci)極(ji)產(chan)生(sheng)的(de)渦(wo)流(liu)與(yu)另(ling)一(yi)個(ge)磁(ci)極(ji)的(de)電(dian)壓(ya)磁(ci)通(tong)相(xiang)互(hu)作(zuo)用(yong)產(chan)生(sheng)的(de)力(li)矩(ju)，電(dian)流(liu)線(xian)圈(quan)一(yi)個(ge)磁(ci)極(ji)產(chan)生(sheng)的(de)渦(wo)流(liu)與(yu)另(ling)一(yi)個(ge)磁(ci)極(ji)的(de)電(dian)流(liu)磁(ci)通(tong)相(xiang)互(hu)作(zuo)用(yong)產(chan)生(sheng)的(de)附(fu)加(jia)力(li)矩(ju)。當(dang)三(san)相(xiang)電(dian)能(neng)表(biao)按(an)正(zheng)相(xiang)序(xu)接(jie)入(ru)進(jin)行(xing)校(xiao)驗(yan)調(tiao)整(zheng)後(hou)，使(shi)得(de)包(bao)括(kuo)這(zhe)些(xie)附(fu)加(jia)力(li)矩(ju)在(zai)內(nei)的(de)正(zheng)反(fan)向(xiang)力(li)矩(ju)保(bao)持(chi)平(ping)衡(heng)關(guan)係(xi)
，使(shi)誤(wu)差(cha)最(zui)小(xiao)。當(dang)電(dian)能(neng)表(biao)按(an)逆(ni)相(xiang)序(xu)接(jie)入(ru)時(shi)

，由(you)於(yu)各(ge)電(dian)磁(ci)元(yuan)件(jian)的(de)不(bu)對(dui)稱(cheng)
，使(shi)得(de)這(zhe)些(xie)附(fu)加(jia)力(li)矩(ju)發(fa)生(sheng)了(le)大(da)小(xiao)、方fang向xiang的de變bian化hua，也ye就jiu改gai變bian了le它ta對dui驅qu動dong力li矩ju的de數shu量liang關guan係xi
，於yu是shi會hui引yin起qi附fu加jia誤wu差cha使shi電dian能neng表biao產chan生sheng潛qian動dong。電dian能neng表biao在zai正zheng常chang使shi用yong時shi
，潛qian動dong不bu易yi發fa現xian，隻zhi有you在zai斷duan開kai負fu載zai電dian流liu而er有you進jin線xian電dian壓ya時shi才cai能neng觀guan察cha到dao。

　　在zai實shi際ji工gong作zuo中zhong，供gong電dian所suo職zhi工gong接jie觸chu到dao的de三san相xiang用yong電dian戶hu常chang是shi低di壓ya供gong電dian
，使shi用yong的de多duo為wei機ji械xie式shi三san相xiang四si線xian電dian能neng表biao。當dang安an裝zhuang完wan電dian能neng表biao後hou，也ye能neng夠gou做zuo到dao通tong電dian檢jian查zha電dian能neng表biao是shi否fou正zheng轉zhuan及ji表biao轉zhuan速su是shi否fou正zheng常chang，但dan往wang往wang忽hu略lve測ce試shi三san相xiang電dian壓ya相xiang序xu是shi否fou正zheng確que。如ru果guo安an裝zhuang有you無wu功gong電dian能neng表biao，可ke以yi通tong過guo觀guan察cha無wu功gong表biao是shi否fou正zheng轉zhuan來lai判pan斷duan相xiang序xu的de正zheng確que與yu否fou。但dan在zai隻zhi裝zhuang有you有you功gong電dian能neng表biao的de時shi候hou

，就jiu不bu能neng憑ping電dian能neng表biao的de正zheng轉zhuan來lai判pan別bie相xiang序xu正zheng確que，因yin為wei當dang接jie入ru反fan相xiang序xu時shi，三san相xiang有you功gong電dian能neng表biao仍reng能neng正zheng轉zhuan。所suo以yi
，為wei了le避bi免mian逆ni相xiang序xu對dui三san相xiang電dian能neng表biao造zao成cheng潛qian動dong及ji附fu加jia誤wu差cha，故gu在zai安an裝zhuang好hao三san相xiang電dian能neng表biao後hou，要yao進jin行xing通tong電dian檢jian查zha測ce試shi，並bing用yong相xiang序xu表biao複fu測ce三san相xiang電dian壓ya相xiang序xu是shi否fou正zheng確que。若ruo為wei反fan相xiang序xu，可ke任ren意yi調tiao換huan兩liang相xiang的de進jin出chu線xian改gai為wei正zheng相xiang序xu。對dui帶dai互hu感gan器qi的de電dian能neng表biao在zai調tiao整zheng相xiang序xu時shi，要yao注zhu意yi同tong相xiang的de電dian壓ya與yu電dian流liu要yao同tong時shi調tiao換huan才cai正zheng確que。