智能高壓絕緣電阻測(ce)試(shi)儀(yi)概述(shu)

電力(li)(li)試驗規程對眾多的(de)(de)電力(li)(li)設備如：電纜、電機、發電機、變壓(ya)器(qi)、互(hu)感器(qi)、高壓(ya)開關、避雷器(qi)等要求(qiu)做(zuo)一系(xi)列的(de)(de)絕緣性(xing)能試驗，首(shou)先是要做(zuo)絕緣電阻測試。近年來隨著電力(li)(li)事業的(de)(de)飛速(su)發展(zhan),大容(rong)量設備的(de)(de)使用不斷增加，用普通的(de)(de)兆(zhao)歐表無法檢(jian)測其絕緣性(xing)能。

在測試(shi)(shi)(shi)大容量(liang)電(dian)(dian)(dian)(dian)力設備的(de)絕(jue)緣(yuan)(yuan)電(dian)(dian)(dian)(dian)阻(zu)時，絕(jue)緣(yuan)(yuan)電(dian)(dian)(dian)(dian)阻(zu)值和加壓的(de)時間(jian)有(you)關，加壓時間(jian)越長，絕(jue)緣(yuan)(yuan)阻(zu)值越高，這種現象叫絕(jue)緣(yuan)(yuan)的(de)吸(xi)(xi)收現象。要(yao)了解被試(shi)(shi)(shi)品的(de)絕(jue)緣(yuan)(yuan)性(xing)(xing)能必須首先對(dui)其做吸(xi)(xi)收比和極化指數試(shi)(shi)(shi)驗，為(wei)下(xia)一步的(de)泄漏、介質損耗、局部放電(dian)(dian)(dian)(dian)等，絕(jue)緣(yuan)(yuan)性(xing)(xing)能試(shi)(shi)(shi)驗提供(gong)安全(quan)保障(zhang)。我公司依照電(dian)(dian)(dian)(dian)力標準化規程特推(tui)出JD-2705A 高壓絕(jue)緣(yuan)(yuan)電(dian)(dian)(dian)(dian)阻(zu)測試(shi)(shi)(shi)儀（以下(xia)簡稱JD-2705A），對(dui)電(dian)(dian)(dian)(dian)力設備進(jin)行絕(jue)緣(yuan)(yuan)、吸(xi)(xi)收比、極化指數耐壓泄漏試(shi)(shi)(shi)驗，為(wei)系列(lie)絕(jue)緣(yuan)(yuan)試(shi)(shi)(shi)驗提供(gong)前期準確(que)判斷。

由于(yu)充(chong)(chong)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)流直(zhi)接影響到(dao)大容量容性試(shi)(shi)(shi)品的(de)絕緣值(zhi)(zhi)測試(shi)(shi)(shi)，因此需要大的(de)充(chong)(chong)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)流，充(chong)(chong)電(dian)(dian)(dian)(dian)能(neng)力越強吸收(shou)比(bi)測試(shi)(shi)(shi)值(zhi)(zhi)就越接近真實值(zhi)(zhi)。JD-2705A短路(lu)電(dian)(dian)(dian)(dian)流大于(yu)5mA,克(ke)服了普(pu)通型兆歐(ou)(ou)表(biao)短路(lu)電(dian)(dian)(dian)(dian)流小，測試(shi)(shi)(shi)不準(zhun)(zhun)確、易(yi)受干擾(rao)等(deng)弊端。JD-2705A采(cai)取適時(shi)電(dian)(dian)(dian)(dian)壓(ya)(ya)電(dian)(dian)(dian)(dian)流采(cai)樣(yang)做除(chu)法運算(suan)，所以在測試(shi)(shi)(shi)時(shi)即(ji)便(bian)電(dian)(dian)(dian)(dian)壓(ya)(ya)發生變化，由歐(ou)(ou)姆定理計算(suan)得到(dao)的(de)電(dian)(dian)(dian)(dian)阻(zu)值(zhi)(zhi)也是準(zhun)(zhun)確的(de)。該表(biao)采(cai)用*的(de)單片機(ji)控制流程，人機(ji)界面對(dui)話(hua)，攜帶方便(bian)，操作簡單；內附高性能(neng)大容量充(chong)(chong)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)池(chi)，交直(zhi)流兩(liang)用，并設有欠壓(ya)(ya)保(bao)(bao)護和電(dian)(dian)(dian)(dian)池(chi)過充(chong)(chong)保(bao)(bao)護。儀(yi)器測試(shi)(shi)(shi)大容性負載(zai)時(shi)，測試(shi)(shi)(shi)完成后自動(dong)放電(dian)(dian)(dian)(dian)速度快，實時(shi)監測放電(dian)(dian)(dian)(dian)過程。本儀(yi)器可以自動(dong)顯示當(dang)前時(shi)間，保(bao)(bao)存(cun)歷史測試(shi)(shi)(shi)數據及時(shi)間，為(wei)試(shi)(shi)(shi)驗(yan)人員(yuan)提供了極大的(de)方便(bian)。

本儀器是一種新型智能化儀表，是試驗人員的最-佳選擇。