DGY300B系(xi)列電纜故障查找 測距 定位儀工作原理其方法(fa)(fa)是首先在(zai)不擊(ji)穿(chuan)被測電(dian)(dian)纜故(gu)障點(dian)的(de)情況下，測得低(di)壓(ya)脈(mo)(mo)(mo)沖的(de)反射波形(xing)(xing)(xing)，緊接著用(yong)高壓(ya)脈(mo)(mo)(mo)沖擊(ji)穿(chuan)電(dian)(dian)纜的(de)故(gu)障點(dian)產(chan)生電(dian)(dian)弧(hu)，電(dian)(dian)弧(hu)電(dian)(dian)壓(ya)降到一定(ding)值時觸發中壓(ya)脈(mo)(mo)(mo)沖來(lai)穩定(ding)和延長(chang)電(dian)(dian)弧(hu)時間，之后再發出低(di)壓(ya)脈(mo)(mo)(mo)沖，從而得到故(gu)障點(dian)的(de)反射波形(xing)(xing)(xing)，兩條(tiao)波形(xing)(xing)(xing)疊加(jia)后同樣(yang)可(ke)以發現發散(san)點(dian)就(jiu)是故(gu)障點(dian)對(dui)應(ying)的(de)位(wei)置(zhi)。由于采用(yong)了中壓(ya)脈(mo)(mo)(mo)沖來(lai)穩定(ding)和延長(chang)電(dian)(dian)弧(hu)時間，比二(er)次脈(mo)(mo)(mo)沖法(fa)(fa)更容易得到故(gu)障點(dian)波形(xing)(xing)(xing)。相(xiang)對(dui)于二(er)次脈(mo)(mo)(mo)沖法(fa)(fa)由于三次脈(mo)(mo)(mo)沖法(fa)(fa)不用(yong)選(xuan)擇燃(ran)弧(hu)的(de)同步時長(chang)，操(cao)作起來(lai)也跟加(jia)簡便。

電纜(lan)故(gu)障(zhang)定(ding)位(wei)儀(yi)采用雙沖擊方法延(yan)長(chang)燃弧時間并穩(wen)弧,能夠輕(qing)易地定位(wei)(wei)高(gao)阻(zu)(zu)故(gu)(gu)障(zhang)和閃絡(luo)性故(gu)(gu)障(zhang)。三次脈沖法技術*,操作簡單,波形(xing)清晰(xi),定位(wei)(wei)快速(su)準確,目前已經成為高(gao)阻(zu)(zu)故(gu)(gu)障(zhang)和閃絡(luo)性故(gu)(gu)障(zhang)的主流定位(wei)(wei)方法。

電纜故障查找 測距 定位儀

三(san)次脈沖法(fa)是(shi)二次脈沖法(fa)的(de)升級。全長及電(dian)(dian)纜故障點(dian)距測試端的(de)大致位置。電(dian)(dian)纜故障定點(dian)儀是(shi)電(dian)(dian)纜故障測試儀主機確(que)定電(dian)(dian)纜故障點(dian)的(de)大致位置的(de)基礎上(shang)來確(que)定電(dian)(dian)纜故障點(dian)的(de)精確(que)位置。

對于未(wei)知走向的埋地電(dian)(dian)纜，電(dian)(dian)力電(dian)(dian)纜故障測試(shi)儀(yi)的工作(zuo)原(yuan)理:

電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)故(gu)(gu)(gu)障(zhang)(zhang)(zhang)(zhang)(zhang)(zhang)查找儀電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)故(gu)(gu)(gu)障(zhang)(zhang)(zhang)(zhang)(zhang)(zhang)測距儀電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)故(gu)(gu)(gu)障(zhang)(zhang)(zhang)(zhang)(zhang)(zhang)定位(wei)儀由電(dian)(dian)(dian)(dian)(dian)(dian)力電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)故(gu)(gu)(gu)障(zhang)(zhang)(zhang)(zhang)(zhang)(zhang)測試(shi)儀主(zhu)機(ji)、電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)故(gu)(gu)(gu)障(zhang)(zhang)(zhang)(zhang)(zhang)(zhang)定位(wei)儀、電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)路徑(jing)儀三個(ge)(ge)(ge)主(zhu)要局部組成。電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)故(gu)(gu)(gu)障(zhang)(zhang)(zhang)(zhang)(zhang)(zhang)測試(shi)儀主(zhu)機(ji)用于(yu)丈(zhang)量(liang)(liang)電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)故(gu)(gu)(gu)障(zhang)(zhang)(zhang)(zhang)(zhang)(zhang)故(gu)(gu)(gu)障(zhang)(zhang)(zhang)(zhang)(zhang)(zhang)性質。需使用路徑(jing)儀來確(que)定電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)的(de)(de)地下走向(xiang)。電(dian)(dian)(dian)(dian)(dian)(dian)力電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)故(gu)(gu)(gu)障(zhang)(zhang)(zhang)(zhang)(zhang)(zhang)進行測試(shi)的(de)(de)基本方(fang)法是(shi)通(tong)過對故(gu)(gu)(gu)障(zhang)(zhang)(zhang)(zhang)(zhang)(zhang)電(dian)(dian)(dian)(dian)(dian)(dian)力電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)施加(jia)高(gao)壓(ya)脈(mo)(mo)(mo)沖(chong)(chong)(chong)(chong)，電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)故(gu)(gu)(gu)障(zhang)(zhang)(zhang)(zhang)(zhang)(zhang)點(dian)處產生(sheng)擊穿，電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)故(gu)(gu)(gu)障(zhang)(zhang)(zhang)(zhang)(zhang)(zhang)擊穿點(dian)放電(dian)(dian)(dian)(dian)(dian)(dian)的(de)(de)同(tong)時(shi)對外發(fa)(fa)生(sheng)電(dian)(dian)(dian)(dian)(dian)(dian)磁波(bo)(bo)并同(tong)時(shi)發(fa)(fa)出聲音。讓電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)的(de)(de)高(gao)阻(zu)故(gu)(gu)(gu)障(zhang)(zhang)(zhang)(zhang)(zhang)(zhang)點(dian)發(fa)(fa)生(sheng)擊穿燃弧。同(tong)時(shi)，測試(shi)端加(jia)入(ru)丈(zhang)量(liang)(liang)用的(de)(de)低(di)(di)壓(ya)脈(mo)(mo)(mo)沖(chong)(chong)(chong)(chong)，丈(zhang)量(liang)(liang)脈(mo)(mo)(mo)沖(chong)(chong)(chong)(chong)到(dao)達電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)的(de)(de)高(gao)阻(zu)故(gu)(gu)(gu)障(zhang)(zhang)(zhang)(zhang)(zhang)(zhang)點(dian)時(shi)，遇到(dao)電(dian)(dian)(dian)(dian)(dian)(dian)弧，電(dian)(dian)(dian)(dian)(dian)(dian)弧的(de)(de)外表(biao)發(fa)(fa)生(sheng)反射(she)(she)。由于(yu)燃弧時(shi)，高(gao)阻(zu)故(gu)(gu)(gu)障(zhang)(zhang)(zhang)(zhang)(zhang)(zhang)變(bian)成了(le)瞬間的(de)(de)短路故(gu)(gu)(gu)障(zhang)(zhang)(zhang)(zhang)(zhang)(zhang)，低(di)(di)壓(ya)丈(zhang)量(liang)(liang)脈(mo)(mo)(mo)沖(chong)(chong)(chong)(chong)將(jiang)發(fa)(fa)生(sheng)明顯(xian)的(de)(de)阻(zu)抗特征變(bian)化，使得閃(shan)(shan)絡測量(liang)(liang)的(de)(de)波(bo)(bo)形(xing)變(bian)為(wei)低(di)(di)壓(ya)脈(mo)(mo)(mo)沖(chong)(chong)(chong)(chong)短路波(bo)(bo)形(xing)，使得波(bo)(bo)形(xing)判別特別簡單清晰。這(zhe)就是(shi)稱之為(wei)的(de)(de)二次脈(mo)(mo)(mo)沖(chong)(chong)(chong)(chong)法"接收到(dao)低(di)(di)壓(ya)脈(mo)(mo)(mo)沖(chong)(chong)(chong)(chong)反射(she)(she)波(bo)(bo)形(xing)相當于(yu)一個(ge)(ge)(ge)線芯對地*短路的(de)(de)波(bo)(bo)形(xing)。將(jiang)釋(shi)放高(gao)壓(ya)脈(mo)(mo)(mo)沖(chong)(chong)(chong)(chong)時(shi)與(yu)未(wei)釋(shi)放高(gao)壓(ya)脈(mo)(mo)(mo)沖(chong)(chong)(chong)(chong)時(shi)所得到(dao)低(di)(di)壓(ya)脈(mo)(mo)(mo)沖(chong)(chong)(chong)(chong)波(bo)(bo)形(xing)進行疊加(jia)，2個(ge)(ge)(ge)波(bo)(bo)形(xing)會有一個(ge)(ge)(ge)發(fa)(fa)散點(dian)，這(zhe)發(fa)(fa)散點(dian)就是(shi)故(gu)(gu)(gu)障(zhang)(zhang)(zhang)(zhang)(zhang)(zhang)點(dian)的(de)(de)反射(she)(she)波(bo)(bo)形(xing)點(dian)。這(zhe)種(zhong)方(fang)法把低(di)(di)壓(ya)脈(mo)(mo)(mo)沖(chong)(chong)(chong)(chong)法和高(gao)壓(ya)閃(shan)(shan)絡技術結合在一起，使測試(shi)人(ren)員更容易(yi)判斷出故(gu)(gu)(gu)障(zhang)(zhang)(zhang)(zhang)(zhang)(zhang)點(dian)的(de)(de)位(wei)置。

與(yu)傳統的(de)(de)(de)(de)電(dian)纜(lan)定位測(ce)試方法相比,弧反射法（二(er)次脈沖法）電(dian)纜(lan)故(gu)(gu)障定位中的(de)(de)(de)(de)應(ying)用的(de)(de)(de)(de)工(gong)作原理：首先使(shi)用一定電(dian)壓(ya)等級、一定能量的(de)(de)(de)(de)高壓(ya)脈沖在(zai)電(dian)纜(lan)的(de)(de)(de)(de)測(ce)試端施加給故(gu)(gu)障電(dian)纜(lan)。二(er)次脈沖法的(de)(de)(de)(de)*之處，將沖擊高壓(ya)閃絡法中的(de)(de)(de)(de)復雜波形簡化為低壓(ya)脈沖短(duan)路故(gu)(gu)障波形，所以判讀極為簡單，可準確(que)標定故(gu)(gu)障距(ju)離(li)。

電(dian)纜故障(zhang)查(cha)找定位儀(yi)接(jie)線圖