電(dian)(dian)(dian)(dian)(dian)力工作者在工作當中，經(jing)常會需(xu)要(yao)使用回路(lu)(lu)(lu)電(dian)(dian)(dian)(dian)(dian)阻測(ce)(ce)試儀對接(jie)觸(chu)電(dian)(dian)(dian)(dian)(dian)阻進行測(ce)(ce)量(liang)，接(jie)觸(chu)電(dian)(dian)(dian)(dian)(dian)阻也(ye)叫回路(lu)(lu)(lu)電(dian)(dian)(dian)(dian)(dian)阻，具(ju)體來說，回路(lu)(lu)(lu)電(dian)(dian)(dian)(dian)(dian)阻測(ce)(ce)試儀可以對高低壓(ya)開關回路(lu)(lu)(lu)電(dian)(dian)(dian)(dian)(dian)阻、電(dian)(dian)(dian)(dian)(dian)纜線(xian)路(lu)(lu)(lu)直流(liu)電(dian)(dian)(dian)(dian)(dian)阻的高精(jing)度(du)測(ce)(ce)量(liang)，以及(ji)其(qi)他需(xu)要(yao)大電(dian)(dian)(dian)(dian)(dian)流(liu)、微電(dian)(dian)(dian)(dian)(dian)阻測(ce)(ce)量(liang)的測(ce)(ce)試情況等都可以使用到回路(lu)(lu)(lu)電(dian)(dian)(dian)(dian)(dian)阻測(ce)(ce)試儀進行測(ce)(ce)量(liang)。

        那么回路電阻(zu)測試儀(yi)如何測量(liang)接觸電阻(zu)？本文(wen)為(wei)你(ni)簡單介紹：

        在(zai)電(dian)(dian)力系統中(zhong)要(yao)(yao)測(ce)(ce)(ce)量(liang)接觸(chu)電(dian)(dian)阻(zu)(zu)(zu)，電(dian)(dian)力工(gong)作者以前普遍會(hui)采用(yong)常規的(de)(de)(de)QJ44型雙(shuang)臂直流(liu)(liu)電(dian)(dian)橋(qiao)，但是(shi)(shi)此(ci)類(lei)電(dian)(dian)橋(qiao)的(de)(de)(de)測(ce)(ce)(ce)試(shi)(shi)電(dian)(dian)流(liu)(liu)小(xiao)，很難檢測(ce)(ce)(ce)出(chu)回路(lu)(lu)導(dao)體(ti)截面積減少(shao)的(de)(de)(de)缺(que)陷。以及(ji)在(zai)用(yong)這類(lei)方法測(ce)(ce)(ce)量(liang)高(gao)壓開(kai)關(guan)導(dao)電(dian)(dian)回路(lu)(lu)接觸(chu)電(dian)(dian)阻(zu)(zu)(zu)時(shi)(shi)，因為受觸(chu)頭中(zhong)間油膜和氧(yang)化層的(de)(de)(de)影響，測(ce)(ce)(ce)量(liang)結果(guo)會(hui)偏大很多，所(suo)以這是(shi)(shi)無法真實檢測(ce)(ce)(ce)出(chu)接觸(chu)電(dian)(dian)阻(zu)(zu)(zu)值(zhi)的(de)(de)(de)。此(ci)種方法早已被淘(tao)汰。現在(zai)的(de)(de)(de)電(dian)(dian)力工(gong)作者們根據電(dian)(dian)力試(shi)(shi)驗規程(cheng)的(de)(de)(de)規定(ding)，基本都是(shi)(shi)使用(yong)符合電(dian)(dian)力規程(cheng)要(yao)(yao)求的(de)(de)(de)，測(ce)(ce)(ce)量(liang)開(kai)關(guan)、斷路(lu)(lu)器等接觸(chu)電(dian)(dian)阻(zu)(zu)(zu)的(de)(de)(de)測(ce)(ce)(ce)量(liang)電(dian)(dian)流(liu)(liu)不(bu)小(xiao)于(yu)直流(liu)(liu)200A，最小(xiao)電(dian)(dian)流(liu)(liu)保持不(bu)低于(yu)60S時(shi)(shi)間的(de)(de)(de)規定(ding)的(de)(de)(de)回路(lu)(lu)電(dian)(dian)阻(zu)(zu)(zu)測(ce)(ce)(ce)試(shi)(shi)儀，才能保證試(shi)(shi)驗結果(guo)的(de)(de)(de)準確(que)性。

        此款儀器對于接觸電阻的測(ce)量精度非常高，而且(qie)功能強(qiang)大，有(you)數據儲存，輸出(chu)打印，時(shi)間設置(zhi)等很多功能，在測(ce)試方面(mian)還有(you)50A的檔位可以給用(yong)戶選擇，目前是國內可以達(da)到 0.01μΩ分辨率，且(qie)十分穩定的接觸電阻測(ce)試儀，性(xing)能超過進口(kou)大電流微歐計。