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href="/article.html">技術(shù)文章</a> > 了解直流低電阻測試儀特性和注意事項(xiàng)</span></div>  <div id="cekcqasy" class="n-3 c-news"> <div id="cekcqasy" class="newsnr"> <h1>了解直流低電阻測試儀特性和注意事項(xiàng)</h1> <p class="source"><span>日期：2021-03-02</span><span>瀏覽：1409次</span></p> <div> <div style="margin: 0px; padding: 0px; list-style: none; border: 0px; color: rgb(0, 0, 0); font-family: 宋體; font-size: 12px;"><strong>小編帶你了解直流低電阻測試儀特性和注意事項(xiàng)</strong>采用四端測量法專門用于測量低直流電阻的儀器。該產(chǎn)品具有簡便的比較功能，設(shè)定方便，顯示直觀，可廣泛用于測量各種線圈的電阻，電動(dòng)機(jī)、變壓器繞組的電阻，電纜的導(dǎo)線電阻，開關(guān)、插頭、插座等電器的接觸電阻和金屬鉚接電阻。<br /> </div><div style="margin: 0px; padding: 0px; list-style: none; border: 0px; color: rgb(0, 0, 0); font-family: 宋體; font-size: 12px;">　　直流低電阻測試儀特性：<br /> </div><div style="margin: 0px; padding: 0px; list-style: none; border: 0px; color: rgb(0, 0, 0); font-family: 宋體; font-size: 12px;">　　能快速準(zhǔn)確完成變壓器繞組直流電阻的測量；<br /> </div><div style="margin: 0px; padding: 0px; list-style: none; border: 0px; color: rgb(0, 0, 0); font-family: 宋體; font-size: 12px;">　　具備完善的保護(hù)功能；<br /> </div><div style="margin: 0px; padding: 0px; list-style: none; border: 0px; color: rgb(0, 0, 0); font-family: 宋體; font-size: 12px;">　　體積小巧便于攜帶；<br /> </div><div style="margin: 0px; padding: 0px; list-style: none; border: 0px; color: rgb(0, 0, 0); font-family: 宋體; font-size: 12px;">　　液晶全中文菜單，操作簡單直觀；<br /> </div><div style="margin: 0px; padding: 0px; list-style: none; border: 0px; color: rgb(0, 0, 0); font-family: 宋體; font-size: 12px;">　　測試速度快，準(zhǔn)確度高，數(shù)據(jù)重復(fù)性好，抗干擾能力強(qiáng)；<br /> </div><div style="margin: 0px; padding: 0px; list-style: none; border: 0px; color: rgb(0, 0, 0); font-family: 宋體; font-size: 12px;">　　ED0204-20型變壓器直流電阻測試儀適用于各類電力變壓器、互感器繞組等感性低阻值電阻的測量與分析。<br /> </div><div style="margin: 0px; padding: 0px; list-style: none; border: 0px; color: rgb(0, 0, 0); font-family: 宋體; font-size: 12px;">　　直流低電阻測試儀注意事項(xiàng)：<br /> </div><div style="margin: 0px; padding: 0px; list-style: none; border: 0px; color: rgb(0, 0, 0); font-family: 宋體; font-size: 12px;">　　1、在測無載調(diào)壓變壓器倒分接前一定要復(fù)位，放電結(jié)束后，報(bào)警聲停止10秒鐘以上，方可切換分接點(diǎn)。<br /> </div><div style="margin: 0px; padding: 0px; list-style: none; border: 0px; color: rgb(0, 0, 0); font-family: 宋體; font-size: 12px;">　　2、在拆線前，一定要等放電結(jié)束后，報(bào)警聲停止，等10秒鐘以上再進(jìn)行拆線，以保證電荷*釋放。<br /> </div><div style="margin: 0px; padding: 0px; list-style: none; border: 0px; color: rgb(0, 0, 0); font-family: 宋體; font-size: 12px;">　　3、選擇電流時(shí)要參考技術(shù)指標(biāo)欄內(nèi)量程，不要超過量程和欠量程使用。超量程時(shí)，由于電流達(dá)不到預(yù)設(shè)值，儀器一直處在“正在充電”狀態(tài)。欠量程時(shí)，顯示“電流太小”，當(dāng)出現(xiàn)此兩種狀態(tài)時(shí)要確認(rèn)量程，選擇適合的電流進(jìn)行測試。<br /> </div><div style="margin: 0px; padding: 0px; list-style: none; border: 0px; color: rgb(0, 0, 0); font-family: 宋體; font-size: 12px;">　　4、用助磁法時(shí)注意量程。因?yàn)楦邏壕€圈兩個(gè)并聯(lián)加上一個(gè)串聯(lián)，在整個(gè)測試回路加入了1.5倍的高壓線圈電阻，選擇量程時(shí)要折算在內(nèi)。如果超量程使用輸出電流無法達(dá)到設(shè)定值或輸出電流不穩(wěn)定。<br /> </div><div style="margin: 0px; padding: 0px; list-style: none; border: 0px; color: rgb(0, 0, 0); font-family: 宋體; font-size: 12px;">　　5、助磁法三條線的短接點(diǎn)在放電完畢后拆線時(shí)，可能有剩余電流，拆除時(shí)可能會(huì)打火放電，此屬正?，F(xiàn)象。<br /> </div><div style="margin: 0px; padding: 0px; list-style: none; border: 0px; color: rgb(0, 0, 0); font-family: 宋體; font-size: 12px;">　　6、測試夾與變壓器繞組的引出端連接時(shí)，要注意引出端長期裸露在空氣中，引出端的表面覆蓋了一層氧化膜，該氧化膜可能造成測量結(jié)果不穩(wěn)定或不準(zhǔn)確，所以在接線時(shí)要注意清理氧化膜，或者測試夾與引出端連接好后，用力的扭動(dòng)幾下測試夾以劃破氧化膜保證連接良好。</div><div style="margin: 0px; padding: 0px; list-style: none; border: 0px; color: rgb(0, 0, 0); font-family: 宋體; font-size: 12px;"><img alt="" src="https://img76.chem17.com/9/20210302/637503121859052982892.png" style="width: 737px; height: 473px;" /></div> <div id="cekcqasy" class="clear"></div> </div> <div id="cekcqasy" class="article"> <p>上一篇：<a href="/Article-2563864.html">ETCR3480B絕緣電阻測試儀講解</a></p> <p>下一篇：<a href="/Article-2556620.html">高精度分流器技術(shù)參數(shù)</a></p> </div> <div id="cekcqasy" class="clear"></div> </div> </div> <div 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