三相四線不接出線,只接零線,為什么漏電保護器會跳閘?
添加時間 2020-03-26 返 回

  這(zhe)個(ge)是如果相(xiang)電(dian)(dian)(dian)(dian)壓四(si)(si)線漏電(dian)(dian)(dian)(dian)防(fang)護器內(nei)部的(de)(de)(de)零序(xu)感(gan)(gan)應(ying)直(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)互紅外感(gan)(gan)應(ying)器內(nei)部的(de)(de)(de)二根相(xiang)線和(he)(he)四(si)(si)根零線都在經(jing)歷了它(ta)的(de)(de)(de)。累(lei)計時間(jian)(jian)感(gan)(gan)應(ying)直(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)就是說(shuo)各相(xiang)感(gan)(gan)應(ying)直(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)瞬(shun)時值的(de)(de)(de)矢量圖和(he)(he)(滴出的(de)(de)(de)感(gan)(gan)應(ying)直(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)之間(jian)(jian)于流(liu)(liu)(liu)(liu)(liu)(liu)進的(de)(de)(de)感(gan)(gan)應(ying)直(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)),故(gu)有更(geng)好值表明。累(lei)計時間(jian)(jian)感(gan)(gan)應(ying)直(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)舞(wu)蹈動作(zuo)防(fang)護裝置所檢(jian)查測量的(de)(de)(de)感(gan)(gan)應(ying)直(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)嚴要(yao)求(qiu)講講,是由三種感(gan)(gan)應(ying)直(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)組成,涉及到對(dui)地短(duan)路故(gu)障(zhang)感(gan)(gan)應(ying)直(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)、電(dian)(dian)(dian)(dian)解(jie)電(dian)(dian)(dian)(dian)容感(gan)(gan)應(ying)直(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)、諧波感(gan)(gan)應(ying)直(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)及雜波感(gan)(gan)應(ying)直(zhi)(zhi)(zhi)流(liu)(liu)(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)等。見下面圖如下圖所示(shi)。


         ●從上(shang)圖可以知道,在乘余交(jiao)流(liu)(liu)電動(dong)作圖片呵護(hu)器(qi)中,肯(ken)定(ding)將(jiang)工作的(de)零線(xian)N與(yu)輸入的(de)五根(gen)相線(xian)L1、L2、L3以同等的(de)目標(biao)方向橫穿超(chao)過電壓感應(ying)直(zhi)流(liu)(liu)電壓互調節器(qi),這樣(yang)一來(lai)就能(neng)夠真(zhen)正意義上(shang)檢驗出來(lai)超(chao)過電壓感應(ying)直(zhi)流(liu)(liu)電壓的(de)失量和,反之超(chao)過電壓感應(ying)直(zhi)流(liu)(liu)電壓保障器(qi)說服行動(dong)。

   ●用(yong)不完(wan)(wan)工(gong)(gong)(gong)作電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓交(jiao)流電(dian)(dian)(dian)(dian)(dian)(dian)(dian)與漏(lou)(lou)(lou)(lou)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)工(gong)(gong)(gong)作電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓交(jiao)流電(dian)(dian)(dian)(dian)(dian)(dian)(dian)是(shi)(shi)有(you)相(xiang)(xiang)當(dang)大什么差別的(de)(de),不可以將二者相(xiang)(xiang)互間(jian)混同下(xia)去,特(te)備是(shi)(shi)對于那些單相(xiang)(xiang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)機電(dian)(dian)(dian)(dian)(dian)(dian)(dian)四線低壓低電(dian)(dian)(dian)(dian)(dian)(dian)(dian)力網用(yong)到的(de)(de)漏(lou)(lou)(lou)(lou)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)庇護器,有(you)漏(lou)(lou)(lou)(lou)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)工(gong)(gong)(gong)作電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓交(jiao)流電(dian)(dian)(dian)(dian)(dian)(dian)(dian)不相(xiang)(xiang)應產生用(yong)不完(wan)(wan)工(gong)(gong)(gong)作電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓交(jiao)流電(dian)(dian)(dian)(dian)(dian)(dian)(dian)。如(ru)單相(xiang)(xiang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)機電(dian)(dian)(dian)(dian)(dian)(dian)(dian)漏(lou)(lou)(lou)(lou)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)之比單相(xiang)(xiang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)機電(dian)(dian)(dian)(dian)(dian)(dian)(dian)工(gong)(gong)(gong)作電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓交(jiao)流電(dian)(dian)(dian)(dian)(dian)(dian)(dian)瞬(shun)時(shi)值的(de)(de)矢量素材和為零,不會每(mei)一(yi)位相(xiang)(xiang)的(de)(de)漏(lou)(lou)(lou)(lou)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)工(gong)(gong)(gong)作電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓交(jiao)流電(dian)(dian)(dian)(dian)(dian)(dian)(dian)有(you)多重,用(yong)不完(wan)(wan)工(gong)(gong)(gong)作電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓交(jiao)流電(dian)(dian)(dian)(dian)(dian)(dian)(dian)也(ye)是(shi)(shi)不是(shi)(shi)為零,一(yi)同,有(you)用(yong)不完(wan)(wan)工(gong)(gong)(gong)作電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓交(jiao)流電(dian)(dian)(dian)(dian)(dian)(dian)(dian)不相(xiang)(xiang)應有(you)也(ye)是(shi)(shi)的(de)(de)漏(lou)(lou)(lou)(lou)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)工(gong)(gong)(gong)作電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓交(jiao)流電(dian)(dian)(dian)(dian)(dian)(dian)(dian),如(ru)零線重新接(jie)地線和控(kong)制開關相(xiang)(xiang)互間(jian)混線等,即用(yong)到不完(wan)(wan)工(gong)(gong)(gong)作電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓交(jiao)流電(dian)(dian)(dian)(dian)(dian)(dian)(dian)相(xiang)(xiang)當(dang)大,漏(lou)(lou)(lou)(lou)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)工(gong)(gong)(gong)作電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓交(jiao)流電(dian)(dian)(dian)(dian)(dian)(dian)(dian)也(ye)是(shi)(shi)相(xiang)(xiang)應與相(xiang)(xiang)關系。

   ●零(ling)序累(lei)計(ji)(ji)直(zhi)(zhi)(zhi)流電(dian)互(hu)調節(jie)(jie)器(qi)(qi)是累(lei)計(ji)(ji)直(zhi)(zhi)(zhi)流電(dian)性(xing)(xing)瑜(yu)(yu)伽的(de)(de)(de)(de)健(jian)身(shen)動(dong)(dong)作(zuo)確保試(shi)驗(yan)裝置(zhi)中(zhong)的(de)(de)(de)(de)一(yi)(yi)款測量零(ling)件。只要有二(er)根相線(xian)(xian)于此穿過累(lei)計(ji)(ji)直(zhi)(zhi)(zhi)流電(dian)互(hu)調節(jie)(jie)器(qi)(qi),它(ta)會出漏(lou)電(dian)直(zhi)(zhi)(zhi)流電(dian)存在著,但這(zhe)個那時(shi)候累(lei)計(ji)(ji)直(zhi)(zhi)(zhi)流電(dian)互(hu)調節(jie)(jie)器(qi)(qi)就(jiu)失(shi)去了它(ta)的(de)(de)(de)(de)最基本上能力了,不(bu)一(yi)(yi)定候的(de)(de)(de)(de)累(lei)計(ji)(ji)直(zhi)(zhi)(zhi)流電(dian)性(xing)(xing)瑜(yu)(yu)伽的(de)(de)(de)(de)健(jian)身(shen)動(dong)(dong)作(zuo)確保器(qi)(qi)也(ye)許(xu)為合不(bu)上閘也(ye)許(xu)避免性(xing)(xing)瑜(yu)(yu)伽的(de)(de)(de)(de)健(jian)身(shen)動(dong)(dong)作(zuo)條(tiao)件;即使是三二(er)根火錢(qian)不(bu)存在輸送,零(ling)線(xian)(xian)從未(wei)接至新高壓(ya)線(xian)(xian)路中(zhong),零(ling)線(xian)(xian)它(ta)從未(wei)就(jiu)能夠測量出累(lei)計(ji)(ji)漏(lou)電(dian)直(zhi)(zhi)(zhi)流電(dian),這(zhe)個那時(shi)候它(ta)會上報給電(dian)子(zi)廠新高壓(ya)線(xian)(xian)路,制定性(xing)(xing)瑜(yu)(yu)伽的(de)(de)(de)(de)健(jian)身(shen)動(dong)(dong)作(zuo)喲。見出來了圖表達(da)。

   ●余量(liang)感應電流動作呵(he)護(hu)保護(hu)開關最(zui)主(zhu)要的由四種(zhong)總(zong)體原則主(zhu)成,即警(jing)報查測、警(jing)報正(zheng)確處理、審理平臺(tai)和(he)試驗檢測保護(hu)開關。

   1、剩余電(dian)(dian)流(liu)互感(gan)器(qi)也(ye)俗(su)稱為(wei)零序(xu)電(dian)(dian)流(liu)互感(gan)器(qi)(用(yong)RCT表示),它(ta)是是一(yi)個信號檢(jian)測(ce)(ce)元件,用(yong)來檢(jian)測(ce)(ce)一(yi)次線(xian)路中的(de)剩余電(dian)(dian)流(liu),一(yi)般采用(yong)高導磁率的(de)鐵氧體(ti)為(wei)基材的(de)環(huan)形互感(gan)器(qi)。安裝時,把(ba)被保護范圍的(de)三相四(si)線(xian)一(yi)次回(hui)路全(quan)部(bu)穿(chuan)過零序(xu)電(dian)(dian)流(liu)互感(gan)器(qi)來檢(jian)測(ce)(ce)一(yi)次回(hui)路中電(dian)(dian)流(liu)的(de)矢量和。

   2、信(xin)號(hao)處(chu)(chu)理(li),主要是(shi)電子(zi)電路(lu),功能是(shi)對取(qu)樣檢(jian)測環節送來(lai)的微弱(ruo)電流(liu)信(xin)號(hao)進行(xing)放(fang)大,交(jiao)換和比較運算(suan)等(deng)一(yi)系列電子(zi)運算(suan)處(chu)(chu)理(li)后輸出一(yi)個可命令執(zhi)行(xing)的OUT信(xin)號(hao)給執(zhi)行(xing)機構完成(cheng)通斷(duan)的信(xin)號(hao)指令。

   3、履(lv)行(xing)工作醫(yi)院主耍一個脫(tuo)扣器(qi)(交談相處器(qi)或(huo)短路(lu)器(qi)),功用是受到(dao)并履(lv)行(xing)工作通(tong)斷(duan)指令英文,離不開(kai)可轉移的觸頭來斷(duan)掉被(bei)愛護的路(lu)線。

   4、實驗裝制(zhi)都是個用模以(yi)信息(xi)出現的(de)其他(ta)小運作(zuo)(zuo)電壓工作(zuo)(zuo)電流(liu)來簡約(yue)的(de)測量其他(ta)電壓工作(zuo)(zuo)電流(liu)小運作(zuo)(zuo)守護裝制(zhi)能不有效性的(de)裝制(zhi)。

   ●當(dang)低壓供電(dian)電(dian)源3x380v+N輸入導線穿(chuan)過RCT互感器的(de)(de)磁(ci)(ci)芯時,它會檢測(ce)被(bei)保護控制的(de)(de)線路電(dian)流的(de)(de)矢(shi)量和(he)。當(dang)正常情(qing)況下,三相電(dian)流基(ji)本平衡,此(ci)時通(tong)(tong)過RCT的(de)(de)一次側電(dian)流矢(shi)量和(he)等(deng)于0,根據基(ji)爾霍夫(fu)電(dian)流定律公式可得到;ΣI=IL1+IL2+lL3+IN=0 此(ci)時,三相工作電(dian)流在剩余電(dian)流互感器RCT環形(xing)鐵芯中(zhong)所產生的(de)(de)磁(ci)(ci)通(tong)(tong)量φ之和(he)也(ye)為(wei)0,即;φL1+ψL2+φL3+ψLN=0

   當保護(hu)器的(de)(de)輸出線(xian)路有剩(sheng)(sheng)(sheng)余(yu)(yu)電(dian)流(liu)(liu)或(huo)其它接地漏(lou)電(dian)故(gu)障時,由于剩(sheng)(sheng)(sheng)余(yu)(yu)電(dian)流(liu)(liu)的(de)(de)存在(zai),迫使這個剩(sheng)(sheng)(sheng)余(yu)(yu)電(dian)流(liu)(liu)通(tong)過RCT一(yi)次側檢測的(de)(de)三相負荷電(dian)流(liu)(liu),其中包括工作零(ling)線(xian)N的(de)(de)電(dian)流(liu)(liu)的(de)(de)矢(shi)量和(he)不(bu)再為0,打(da)破了平衡(heng),此時,基爾霍(huo)夫(fu)方(fang)程兩(liang)邊為不(bu)等于≠即(ji)ΣI=IL1+lL2+IL3+ILN≠0,從而剩(sheng)(sheng)(sheng)余(yu)(yu)電(dian)流(liu)(liu)互感器RCT的(de)(de)磁通(tong)量公式也被打(da)破平衡(heng)≠。即(ji)φL1+φL2+φL3+φLN≠0 此時RCT將檢測出的(de)(de)信號(hao)送入E→電(dian)子信號(hao)放大運(yun)算器中,由剩(sheng)(sheng)(sheng)余(yu)(yu)電(dian)流(liu)(liu)脫扣器來(lai)執行(xing)命令,進行(xing)分(fen)閘保護(hu)。

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