智能高(gao)壓(ya)絕緣電阻測試儀概述

電(dian)力(li)試驗規程對眾多(duo)的(de)電(dian)力(li)設備(bei)如：電(dian)纜、電(dian)機(ji)、發(fa)電(dian)機(ji)、變壓器(qi)(qi)、互(hu)感器(qi)(qi)、高壓開關、避雷器(qi)(qi)等(deng)要(yao)求做(zuo)一系列的(de)絕(jue)緣性能試驗，首先是要(yao)做(zuo)絕(jue)緣電(dian)阻(zu)測(ce)試。近年來隨著電(dian)力(li)事業的(de)飛速發(fa)展,大(da)容量設備(bei)的(de)使用不斷增加，用普(pu)通的(de)兆歐表無法(fa)檢(jian)測(ce)其絕(jue)緣性能。

在測試(shi)(shi)大容量(liang)電(dian)力設備的絕(jue)緣(yuan)電(dian)阻(zu)時(shi)，絕(jue)緣(yuan)電(dian)阻(zu)值和加壓(ya)的時(shi)間(jian)有關，加壓(ya)時(shi)間(jian)越長，絕(jue)緣(yuan)阻(zu)值越高，這種現象叫絕(jue)緣(yuan)的吸(xi)收現象。要了解被試(shi)(shi)品的絕(jue)緣(yuan)性能(neng)(neng)必(bi)須首先對(dui)其做吸(xi)收比和極(ji)化(hua)指數(shu)試(shi)(shi)驗，為(wei)下一(yi)步的泄漏、介(jie)質損耗、局部(bu)放電(dian)等(deng)，絕(jue)緣(yuan)性能(neng)(neng)試(shi)(shi)驗提(ti)(ti)供安全保障(zhang)。我公司依照電(dian)力標準(zhun)(zhun)化(hua)規程(cheng)特推出JD-2705A 高壓(ya)絕(jue)緣(yuan)電(dian)阻(zu)測試(shi)(shi)儀(yi)（以下簡稱(cheng)JD-2705A），對(dui)電(dian)力設備進(jin)行絕(jue)緣(yuan)、吸(xi)收比、極(ji)化(hua)指數(shu)耐(nai)壓(ya)泄漏試(shi)(shi)驗，為(wei)系列絕(jue)緣(yuan)試(shi)(shi)驗提(ti)(ti)供前(qian)期準(zhun)(zhun)確(que)判斷。

由于(yu)充(chong)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)流直(zhi)接(jie)影響(xiang)到(dao)大(da)(da)(da)容量(liang)容性試(shi)(shi)(shi)品(pin)的(de)絕緣值(zhi)測(ce)(ce)試(shi)(shi)(shi)，因此(ci)需(xu)要大(da)(da)(da)的(de)充(chong)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)流，充(chong)電(dian)(dian)(dian)(dian)能力越(yue)強吸收(shou)比測(ce)(ce)試(shi)(shi)(shi)值(zhi)就越(yue)接(jie)近(jin)真實(shi)值(zhi)。JD-2705A短路電(dian)(dian)(dian)(dian)流大(da)(da)(da)于(yu)5mA,克服了普通型兆歐表短路電(dian)(dian)(dian)(dian)流小，測(ce)(ce)試(shi)(shi)(shi)不準確、易受干擾等弊端。JD-2705A采(cai)取適時(shi)(shi)(shi)(shi)電(dian)(dian)(dian)(dian)壓(ya)(ya)電(dian)(dian)(dian)(dian)流采(cai)樣做除(chu)法運算，所以在測(ce)(ce)試(shi)(shi)(shi)時(shi)(shi)(shi)(shi)即便(bian)(bian)電(dian)(dian)(dian)(dian)壓(ya)(ya)發生變(bian)化(hua)，由歐姆定理計算得到(dao)的(de)電(dian)(dian)(dian)(dian)阻值(zhi)也(ye)是準確的(de)。該表采(cai)用*的(de)單(dan)片機控制流程，人機界面對話(hua)，攜帶方(fang)便(bian)(bian)，操作簡單(dan)；內附高性能大(da)(da)(da)容量(liang)充(chong)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)池(chi)，交直(zhi)流兩用，并設有欠壓(ya)(ya)保護和(he)電(dian)(dian)(dian)(dian)池(chi)過充(chong)保護。儀器測(ce)(ce)試(shi)(shi)(shi)大(da)(da)(da)容性負載(zai)時(shi)(shi)(shi)(shi)，測(ce)(ce)試(shi)(shi)(shi)完成后自動(dong)(dong)放(fang)電(dian)(dian)(dian)(dian)速度快，實(shi)時(shi)(shi)(shi)(shi)監測(ce)(ce)放(fang)電(dian)(dian)(dian)(dian)過程。本儀器可以自動(dong)(dong)顯示當前時(shi)(shi)(shi)(shi)間，保存歷史測(ce)(ce)試(shi)(shi)(shi)數(shu)據及時(shi)(shi)(shi)(shi)間，為試(shi)(shi)(shi)驗人員提供了極大(da)(da)(da)的(de)方(fang)便(bian)(bian)。

本儀器是一種新型智能化儀表，是試驗人員的最-佳選擇。