DGY300B系列電纜故障查找 測距 定位儀工作原(yuan)理其方法是首先在不擊穿(chuan)被測(ce)電(dian)纜故障(zhang)點的(de)情況下，測(ce)得(de)低(di)壓(ya)脈(mo)沖(chong)的(de)反射波(bo)形(xing)，緊接著用高壓(ya)脈(mo)沖(chong)擊穿(chuan)電(dian)纜的(de)故障(zhang)點產生電(dian)弧，電(dian)弧電(dian)壓(ya)降到一(yi)定值時觸發(fa)中壓(ya)脈(mo)沖(chong)來穩(wen)定和(he)延長(chang)電(dian)弧時間，之(zhi)后再發(fa)出低(di)壓(ya)脈(mo)沖(chong)，從而得(de)到故障(zhang)點的(de)反射波(bo)形(xing)，兩條(tiao)波(bo)形(xing)疊加后同樣可(ke)以(yi)發(fa)現發(fa)散點就是故障(zhang)點對應的(de)位(wei)置。由(you)于采(cai)用了中壓(ya)脈(mo)沖(chong)來穩(wen)定和(he)延長(chang)電(dian)弧時間，比(bi)二(er)次(ci)脈(mo)沖(chong)法更容(rong)易得(de)到故障(zhang)點波(bo)形(xing)。相(xiang)對于二(er)次(ci)脈(mo)沖(chong)法由(you)于三次(ci)脈(mo)沖(chong)法不用選(xuan)擇燃弧的(de)同步時長(chang)，操作起來也跟加簡便。

電纜故障定(ding)位儀采用雙(shuang)沖擊方法(fa)延長燃弧時間并穩弧,能夠輕易(yi)地定(ding)位(wei)高(gao)阻(zu)(zu)故障(zhang)和(he)閃絡(luo)(luo)性故障(zhang)。三次脈沖法(fa)技術*,操作簡單,波形清晰(xi),定(ding)位(wei)快速準確(que),目前已經成為高(gao)阻(zu)(zu)故障(zhang)和(he)閃絡(luo)(luo)性故障(zhang)的主流定(ding)位(wei)方法(fa)。

電纜故障查找 測距 定位儀

三次脈沖法(fa)是(shi)二(er)次脈沖法(fa)的(de)升級(ji)。全長及電(dian)(dian)纜故(gu)障點(dian)(dian)距測試(shi)端的(de)大致位置(zhi)。電(dian)(dian)纜故(gu)障定(ding)(ding)點(dian)(dian)儀(yi)是(shi)電(dian)(dian)纜故(gu)障測試(shi)儀(yi)主機確定(ding)(ding)電(dian)(dian)纜故(gu)障點(dian)(dian)的(de)大致位置(zhi)的(de)基礎上來確定(ding)(ding)電(dian)(dian)纜故(gu)障點(dian)(dian)的(de)精(jing)確位置(zhi)。

對于未(wei)知走向的埋地(di)電(dian)纜，電(dian)力電(dian)纜故障測試儀(yi)的工作原理(li):

電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)故(gu)(gu)障(zhang)(zhang)(zhang)(zhang)(zhang)(zhang)查找儀電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)故(gu)(gu)障(zhang)(zhang)(zhang)(zhang)(zhang)(zhang)測(ce)(ce)(ce)距儀電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)故(gu)(gu)障(zhang)(zhang)(zhang)(zhang)(zhang)(zhang)定(ding)位儀由(you)電(dian)(dian)(dian)(dian)(dian)力電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)故(gu)(gu)障(zhang)(zhang)(zhang)(zhang)(zhang)(zhang)測(ce)(ce)(ce)試儀主機(ji)、電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)故(gu)(gu)障(zhang)(zhang)(zhang)(zhang)(zhang)(zhang)定(ding)位儀、電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)路(lu)(lu)徑(jing)儀三(san)個主要局部組成。電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)故(gu)(gu)障(zhang)(zhang)(zhang)(zhang)(zhang)(zhang)測(ce)(ce)(ce)試儀主機(ji)用(yong)(yong)(yong)于(yu)丈(zhang)量(liang)電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)故(gu)(gu)障(zhang)(zhang)(zhang)(zhang)(zhang)(zhang)故(gu)(gu)障(zhang)(zhang)(zhang)(zhang)(zhang)(zhang)性質。需使(shi)用(yong)(yong)(yong)路(lu)(lu)徑(jing)儀來(lai)確定(ding)電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)的(de)地下(xia)走向(xiang)。電(dian)(dian)(dian)(dian)(dian)力電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)故(gu)(gu)障(zhang)(zhang)(zhang)(zhang)(zhang)(zhang)進行測(ce)(ce)(ce)試的(de)基本(ben)方(fang)法(fa)是通過對(dui)故(gu)(gu)障(zhang)(zhang)(zhang)(zhang)(zhang)(zhang)電(dian)(dian)(dian)(dian)(dian)力電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)施加(jia)高(gao)壓(ya)(ya)(ya)脈(mo)(mo)沖(chong)，電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)故(gu)(gu)障(zhang)(zhang)(zhang)(zhang)(zhang)(zhang)點處產(chan)生擊(ji)穿，電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)故(gu)(gu)障(zhang)(zhang)(zhang)(zhang)(zhang)(zhang)擊(ji)穿點放(fang)電(dian)(dian)(dian)(dian)(dian)的(de)同時(shi)(shi)(shi)對(dui)外(wai)發生電(dian)(dian)(dian)(dian)(dian)磁波(bo)(bo)并同時(shi)(shi)(shi)發出聲音。讓電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)的(de)高(gao)阻故(gu)(gu)障(zhang)(zhang)(zhang)(zhang)(zhang)(zhang)點發生擊(ji)穿燃弧。同時(shi)(shi)(shi)，測(ce)(ce)(ce)試端加(jia)入丈(zhang)量(liang)用(yong)(yong)(yong)的(de)低壓(ya)(ya)(ya)脈(mo)(mo)沖(chong)，丈(zhang)量(liang)脈(mo)(mo)沖(chong)到達(da)電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)的(de)高(gao)阻故(gu)(gu)障(zhang)(zhang)(zhang)(zhang)(zhang)(zhang)點時(shi)(shi)(shi)，遇(yu)到電(dian)(dian)(dian)(dian)(dian)弧，電(dian)(dian)(dian)(dian)(dian)弧的(de)外(wai)表(biao)發生反(fan)射(she)。由(you)于(yu)燃弧時(shi)(shi)(shi)，高(gao)阻故(gu)(gu)障(zhang)(zhang)(zhang)(zhang)(zhang)(zhang)變(bian)成了瞬間的(de)短(duan)路(lu)(lu)故(gu)(gu)障(zhang)(zhang)(zhang)(zhang)(zhang)(zhang)，低壓(ya)(ya)(ya)丈(zhang)量(liang)脈(mo)(mo)沖(chong)將(jiang)發生明(ming)顯的(de)阻抗特(te)征變(bian)化，使(shi)得閃(shan)絡測(ce)(ce)(ce)量(liang)的(de)波(bo)(bo)形(xing)(xing)(xing)變(bian)為(wei)低壓(ya)(ya)(ya)脈(mo)(mo)沖(chong)短(duan)路(lu)(lu)波(bo)(bo)形(xing)(xing)(xing)，使(shi)得波(bo)(bo)形(xing)(xing)(xing)判(pan)別特(te)別簡單清晰。這(zhe)就(jiu)是稱之為(wei)的(de)二次(ci)脈(mo)(mo)沖(chong)法(fa)"接收(shou)到低壓(ya)(ya)(ya)脈(mo)(mo)沖(chong)反(fan)射(she)波(bo)(bo)形(xing)(xing)(xing)相當(dang)于(yu)一(yi)個線芯對(dui)地*短(duan)路(lu)(lu)的(de)波(bo)(bo)形(xing)(xing)(xing)。將(jiang)釋放(fang)高(gao)壓(ya)(ya)(ya)脈(mo)(mo)沖(chong)時(shi)(shi)(shi)與未釋放(fang)高(gao)壓(ya)(ya)(ya)脈(mo)(mo)沖(chong)時(shi)(shi)(shi)所得到低壓(ya)(ya)(ya)脈(mo)(mo)沖(chong)波(bo)(bo)形(xing)(xing)(xing)進行疊(die)加(jia)，2個波(bo)(bo)形(xing)(xing)(xing)會(hui)有一(yi)個發散點，這(zhe)發散點就(jiu)是故(gu)(gu)障(zhang)(zhang)(zhang)(zhang)(zhang)(zhang)點的(de)反(fan)射(she)波(bo)(bo)形(xing)(xing)(xing)點。這(zhe)種方(fang)法(fa)把低壓(ya)(ya)(ya)脈(mo)(mo)沖(chong)法(fa)和高(gao)壓(ya)(ya)(ya)閃(shan)絡技術(shu)結合(he)在一(yi)起(qi)，使(shi)測(ce)(ce)(ce)試人(ren)員更容易判(pan)斷(duan)出故(gu)(gu)障(zhang)(zhang)(zhang)(zhang)(zhang)(zhang)點的(de)位置。

與傳統的電(dian)纜(lan)定位測(ce)試(shi)方法相比(bi),弧反射(she)法（二次脈(mo)沖法）電(dian)纜(lan)故障(zhang)定位中的應用(yong)的工作原理：首先使用(yong)一(yi)定電(dian)壓(ya)等級(ji)、一(yi)定能量的高壓(ya)脈(mo)沖在電(dian)纜(lan)的測(ce)試(shi)端施(shi)加給(gei)故障(zhang)電(dian)纜(lan)。二次脈(mo)沖法的*之(zhi)處，將沖擊高壓(ya)閃(shan)絡法中的復雜波形簡化(hua)為低壓(ya)脈(mo)沖短路(lu)故障(zhang)波形，所以(yi)判(pan)讀極為簡單，可(ke)準確標定故障(zhang)距離。

電(dian)纜(lan)故障查找定(ding)位儀接線圖