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onmouseover="showsubmenu('隔離開(kāi)關(guān)觸頭壓力測(cè)試儀')">隔離開(kāi)關(guān)觸頭壓力測(cè)試儀</a> <div class="m4sedaowg009" id="submenu_隔離開(kāi)關(guān)觸頭壓力測(cè)試儀" style="display:none"> <ul> <li id="m4sedaowg009" class="ej"><a href="/SonList-2479705.html" class="eja">隔離開(kāi)關(guān)觸頭壓力測(cè)試儀</a></li> </ul> </div> </li> </ul> </div> </div></div> <div id="m4sedaowg009" class="inpage_right"> <div id="m4sedaowg009" class="mbx2"><a href="/">首頁(yè)</a> > <a href="/article.html">技術(shù)文章</a> > 2023-07-12</div> <div id="m4sedaowg009" class="inpage_content"> <div id="m4sedaowg009" class="nr_main_box"> <h1 class="inside_rnewtil">變壓器直流電阻測(cè)試方法</h1> <div id="m4sedaowg009" class="inside_rnewtime">點(diǎn)擊次數(shù)：1613 更新更新時(shí)間：2023-07-12</div> <div id="m4sedaowg009" class="inside_rnewcon"><p style="-webkit-tap-highlight-color: transparent; -webkit-appearance: none; margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", Helvetica, Arial, sans-serif; white-space: normal; background-color: rgb(255, 255, 255);"><span style="font-size: 16px;">變壓器直流電阻測(cè)試方法</span></p><p style="-webkit-tap-highlight-color: transparent; -webkit-appearance: none; margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", Helvetica, Arial, sans-serif; white-space: normal; background-color: rgb(255, 255, 255);"><span style="font-size: 16px;">目前測(cè)量變壓器直流電阻常用的電橋法和電壓降法。直流電阻測(cè)試儀則是選用電橋法原理來(lái)進(jìn)行試驗(yàn)。</span></p><p style="-webkit-tap-highlight-color: transparent; -webkit-appearance: none; margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", Helvetica, Arial, sans-serif; white-space: normal; background-color: rgb(255, 255, 255);"><span style="font-size: 16px;">1.接線示意圖</span></p><p style="-webkit-tap-highlight-color: transparent; -webkit-appearance: none; margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", Helvetica, Arial, sans-serif; white-space: normal; background-color: rgb(255, 255, 255);"><span style="font-size: 16px;">將被測(cè)設(shè)備，用儀器配備專(zhuān)用測(cè)試線連接，按下圖連接，同時(shí)確保各測(cè)試夾具夾接牢固、可靠。</span></p><div id="m4sedaowg009" class="tpimg" microsoft="" white-space:="" background-color:="" style="-webkit-tap-highlight-color: transparent; -webkit-appearance: none; margin: 10px auto; padding: 0px; list-style: none; border: 0px; color: rgb(51, 51, 51); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", Helvetica, Arial, sans-serif; white-space: normal; background-color: rgb(255, 255, 255); width: 600px; position: relative;"><center style="-webkit-tap-highlight-color: transparent; -webkit-appearance: none; margin: 0px; padding: 0px;"><img alt="" src="https://img61.chem17.com/9/20230413/638169803627192108431.jpg" title="變壓器直流電阻測(cè)試接線方法圖示" style="-webkit-tap-highlight-color: transparent; -webkit-appearance: none; margin: 0px; padding: 0px; border: none; vertical-align: middle; max-height: 100%; max-width: 100%; width: 600px; display: block;"/></center><div id="m4sedaowg009" class="tpa" style="-webkit-tap-highlight-color: transparent; -webkit-appearance: none; margin: 0px; padding: 0px; list-style: none; border: 0px; position: absolute; width: 600px; bottom: 0px; left: 0px; height: 40px; line-height: 40px; overflow: hidden; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; opacity: 0.8;"><p class="tpaa" style="-webkit-tap-highlight-color: transparent; -webkit-appearance: none; margin-top: 0px; margin-bottom: 15px; padding: 0px 0px 0px 8px; line-height: 40px; font-weight: 600; text-indent: 8px; color: rgb(31, 32, 32);"><span style="font-size: 16px;">變壓器直流電阻測(cè)試接線方法圖示</span></p></div></div><p style="-webkit-tap-highlight-color: transparent; -webkit-appearance: none; margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", Helvetica, Arial, sans-serif; white-space: normal; background-color: rgb(255, 255, 255);"><span style="font-size: 16px;">2.測(cè)試方法</span></p><p style="-webkit-tap-highlight-color: transparent; -webkit-appearance: none; margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", Helvetica, Arial, sans-serif; white-space: normal; background-color: rgb(255, 255, 255);"><span style="font-size: 16px;">①開(kāi)啟直阻儀電源開(kāi)關(guān)，儀器顯示“歡迎使用"，稍后進(jìn)入“量程選擇"界面，此時(shí)用“向上、向下"鍵移動(dòng)光標(biāo)，選擇所需設(shè)定的測(cè)試量程，按下“確認(rèn)"鍵儀器開(kāi)始測(cè)量。</span></p><p style="-webkit-tap-highlight-color: transparent; -webkit-appearance: none; margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", Helvetica, Arial, sans-serif; white-space: normal; background-color: rgb(255, 255, 255);"><span style="font-size: 16px;">②直阻儀進(jìn)入測(cè)量狀態(tài)中，LCD 屏幕顯示充電模擬條，待充電完成后 LCD 屏幕顯示數(shù)值,即為被測(cè)設(shè)備直流電阻值，此時(shí)按下“確認(rèn)"鍵數(shù)值將被保存并鎖定。當(dāng)屏幕長(zhǎng)時(shí)間顯示“超量程"時(shí),按“返回" 鍵返回上一級(jí)菜單,選擇高一檔測(cè)試量程重新測(cè)試,或請(qǐng)檢查測(cè)試回路是否開(kāi)路。</span></p><p style="-webkit-tap-highlight-color: transparent; -webkit-appearance: none; margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", Helvetica, Arial, sans-serif; white-space: normal; background-color: rgb(255, 255, 255);"><span style="font-size: 16px;">③直阻儀進(jìn)入數(shù)據(jù)鎖定界面，按“打印"鍵數(shù)據(jù)將被打印，數(shù)據(jù)打印完畢后儀器將自動(dòng)放電，放電后返回上一級(jí)菜單。</span></p><p style="-webkit-tap-highlight-color: transparent; -webkit-appearance: none; margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", Helvetica, Arial, sans-serif; white-space: normal; background-color: rgb(255, 255, 255);"><span style="font-size: 16px;">④此次測(cè)試結(jié)束。</span></p><p style="-webkit-tap-highlight-color: transparent; -webkit-appearance: none; margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", Helvetica, Arial, sans-serif; white-space: normal; background-color: rgb(255, 255, 255);"><span style="font-size: 16px;">注:測(cè)試過(guò)程中，出現(xiàn)超量程或測(cè)試夾脫落時(shí)儀器將出現(xiàn)“超量程"提示，請(qǐng)按“返回"鍵，放電后返回上級(jí)菜單重新操作。</span></p><p style="-webkit-tap-highlight-color: transparent; -webkit-appearance: none; margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", Helvetica, Arial, sans-serif; white-space: normal; background-color: rgb(255, 255, 255);"><span style="font-size: 16px;">3.測(cè)試結(jié)果的分析與判斷</span></p><p style="-webkit-tap-highlight-color: transparent; -webkit-appearance: none; margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", Helvetica, Arial, sans-serif; white-space: normal; background-color: rgb(255, 255, 255);"><span style="font-size: 16px;">測(cè)量應(yīng)在各分接頭的所有位置上進(jìn)行；</span></p><p style="-webkit-tap-highlight-color: transparent; -webkit-appearance: none; margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", Helvetica, Arial, sans-serif; white-space: normal; background-color: rgb(255, 255, 255);"><span style="font-size: 16px;">1600KVA及以下容量等級(jí)三相變壓器，各相測(cè)得值的相互差值應(yīng)小于平均值的4%，線間測(cè)得值的相互差值應(yīng)小于平均值的2%；1600kV•A以上三相變壓器，各相測(cè)得值的相互差值應(yīng)小于平均值的2%，線間測(cè)得值的相互差值應(yīng)小于平均值的1%；</span></p><p style="-webkit-tap-highlight-color: transparent; -webkit-appearance: none; margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", Helvetica, Arial, sans-serif; white-space: normal; background-color: rgb(255, 255, 255);"><span style="font-size: 16px;">變壓器的直流電阻，與同溫下產(chǎn)品出廠實(shí)測(cè)數(shù)值比較，相應(yīng)變化不應(yīng)大于2%；不同溫度下電阻值按照下列公式換算。</span></p><p style="-webkit-tap-highlight-color: transparent; -webkit-appearance: none; margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", Helvetica, Arial, sans-serif; white-space: normal; background-color: rgb(255, 255, 255);"><span style="font-size: 16px;">R2=R1•（T+t2 ）/（T+t1） </span></p><p style="-webkit-tap-highlight-color: transparent; -webkit-appearance: none; margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", Helvetica, Arial, sans-serif; white-space: normal; background-color: rgb(255, 255, 255);"><span style="font-size: 16px;">式中R1、R2——分別為溫度在t1、t2(℃)時(shí)的R電阻值(Ω)<br style="-webkit-tap-highlight-color: transparent; -webkit-appearance: none; margin: 0px;"/> T——計(jì)算用常數(shù)，銅導(dǎo)線取235，鋁導(dǎo)線取225</span></p><p style="-webkit-tap-highlight-color: transparent; -webkit-appearance: none; margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", Helvetica, Arial, sans-serif; white-space: normal; background-color: rgb(255, 255, 255);"><span style="font-size: 16px;">由于變壓器結(jié)構(gòu)等原因，差值超過(guò)本條第2款時(shí)，可只按本條第3款進(jìn)行比較，但應(yīng)說(shuō)明原因。</span></p><p style="-webkit-tap-highlight-color: transparent; -webkit-appearance: none; margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", Helvetica, Arial, sans-serif; white-space: normal; background-color: rgb(255, 255, 255);"><span style="font-size: 16px;"></span></p><p style="text-align: center"><img style="max-width: 800px; max-height: 300%; width: 440.925px; height: 410px;" src="https://img67.chem17.com/9/20230712/638247523591524780219.png" title="KD9110f.png" alt="KD9110f.png" width="440" height="410"/></p><p style="text-align: center"><img style="max-width: 800px; max-height: 300%; width: 1px; height: 1px;" src="https://img66.chem17.com/9/20230712/638247523295103657265.png" title="KD9110f.png" alt="KD9110f.png" width="1" height="1"/><br/></p><p style="-webkit-tap-highlight-color: transparent; -webkit-appearance: none; margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", Helvetica, Arial, sans-serif; white-space: normal; background-color: rgb(255, 255, 255);"><span style="font-size: 16px;"></span><br/></p><p style="-webkit-tap-highlight-color: transparent; -webkit-appearance: none; margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", Helvetica, Arial, sans-serif; white-space: normal; background-color: rgb(255, 255, 255);"><span style="font-size: 16px;">4.注意事項(xiàng)</span></p><p style="-webkit-tap-highlight-color: transparent; -webkit-appearance: none; margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", Helvetica, Arial, sans-serif; white-space: normal; background-color: rgb(255, 255, 255);"><span style="font-size: 16px;">①變壓器交接與大修時(shí)，應(yīng)在各側(cè)繞組的所有分接頭位置上進(jìn)行測(cè)量；對(duì)有載調(diào)壓的變壓器·一般也應(yīng)在所有分頭上測(cè)量；在小修時(shí)以及運(yùn)行中更換分接頭位置后，可以在所使用的分接頭位置上進(jìn)行測(cè)量。</span></p><p style="-webkit-tap-highlight-color: transparent; -webkit-appearance: none; margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", Helvetica, Arial, sans-serif; white-space: normal; background-color: rgb(255, 255, 255);"><span style="font-size: 16px;">②測(cè)量時(shí)．要求繞組溫度與周?chē)h(huán)境溫度相差不超過(guò)3℃．并且以頂層油溫作為繞組溫度。</span></p><p style="-webkit-tap-highlight-color: transparent; -webkit-appearance: none; margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", Helvetica, Arial, sans-serif; white-space: normal; background-color: rgb(255, 255, 255);"><span style="font-size: 16px;">③由于繞組的電感較大，電流需要較長(zhǎng)時(shí)間才能穩(wěn)定下來(lái)，必須等電流穩(wěn)定后再讀數(shù)。另外．應(yīng)特別注意，接通電流后再接通電壓表或檢流汁．?dāng)嚅_(kāi)電壓表或檢流計(jì)后再斷開(kāi)電源．以免損壞儀表。同時(shí)應(yīng)注意很高反電勢(shì)危及人身安全。</span></p><p style="-webkit-tap-highlight-color: transparent; -webkit-appearance: none; margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", Helvetica, Arial, sans-serif; white-space: normal; background-color: rgb(255, 255, 255);"><span style="font-size: 16px;">④試驗(yàn)時(shí)用的表計(jì)準(zhǔn)確度要高．引接線力求短、粗．井應(yīng)接觸牢固．否則將影響測(cè)量結(jié)果。</span></p><p><br/></p></div> <div id="m4sedaowg009" class="inside_newsthree"> <p id="newsprev">上一篇：<b class="newsprev"><a href="/Article-3415223.html">KDHX-3200高壓無(wú)線核相儀概述</a></b></p> <p id="newsnext">下一篇：<b class="newsnext"><a href="/Article-3411554.html">KD三相繼電保護(hù)測(cè)試儀試驗(yàn)操作方法</a></b></p> 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