直流耐壓試驗在電機耐壓試驗中意義-上?？档请姎饪萍加邢薰?/title> <link type="text/css" rel="stylesheet" href="/Skins/106676/css/index.css" /> <script src="/skins/106676/js/jquery-3.6.0.min.js"></script> <link rel="stylesheet" type="text/css" href="/skins/106676/css/swiper.min.css"> <script type="text/javascript" src="/skins/106676/js/swiper.min.js"></script>  <script language="javascript" type="text/javascript"> var nav= '5'; var menu= '0'; </script>  <link rel="shortcut icon" href="/skins/106676/favicon.ico"> <script type="application/ld+json"> { "@context": "https://ziyuan.baidu.com/contexts/cambrian.jsonld", "@id": "http:///Article-3776691.html", "title": "直流耐壓試驗在電機耐壓試驗中意義", "pubDate": "2024-08-13T08:50:32", "upDate": "2024-08-13T08:50:32" }</script> <script language="javaScript" src="/js/JSChat.js"></script><script language="javaScript">function ChatBoxClickGXH() { DoChatBoxClickGXH('https://chat.chem17.com',83189) }</script><script>!window.jQuery && document.write('<script 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</form> </div> <div id="iqaqewgi6e" class="clear"></div> </div> </div> <div id="iqaqewgi6e" class="nybanner"><img src="/skins/106676/images/nybanner.jpg"></div> <script src="http://www.chem17.com/mystat.aspx?u=mbdzkj"></script>  <div id="iqaqewgi6e" class="ncontent w_1100"> <div id="iqaqewgi6e" class="h-6">技術(shù)文章<span>您當(dāng)前的位置：<a href="/">首頁</a> > <a href="/article.html">技術(shù)文章</a> > 直流耐壓試驗在電機耐壓試驗中意義</span></div>  <div id="iqaqewgi6e" class="n-3 c-news"> <div id="iqaqewgi6e" class="newsnr"> <h1>直流耐壓試驗在電機耐壓試驗中意義</h1> <p class="source"><span>日期：2024-08-13</span><span>瀏覽：1154次</span></p> <div> <p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(59, 59, 59); font-family: 宋體; white-space: normal; background-color: rgb(255, 255, 255);"><span style="font-family: 宋體, SimSun; font-size: 16px;">直流耐壓試驗不可被交流耐壓試驗代替</span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(59, 59, 59); font-family: 宋體; white-space: normal; background-color: rgb(255, 255, 255);"><span style="font-family: 宋體, SimSun; font-size: 16px;"><br/></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(59, 59, 59); font-family: 宋體; white-space: normal; background-color: rgb(255, 255, 255);"><span style="font-family: 宋體, SimSun; font-size: 16px;">以電機為例：</span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(59, 59, 59); font-family: 宋體; white-space: normal; background-color: rgb(255, 255, 255);"><span style="font-family: 宋體, SimSun; font-size: 16px;"><br/></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(59, 59, 59); font-family: 宋體; white-space: normal; background-color: rgb(255, 255, 255);"><span style="font-family: 宋體, SimSun; font-size: 16px;">對電機采用直流耐壓試驗并測量泄漏電流，可以發(fā)現(xiàn)交流耐壓試驗所不能發(fā)現(xiàn)的缺陷。二種試驗各有檢查能力都是電機交接和預(yù)防性試驗中必做項目，現(xiàn)將二者比較分析。</span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(59, 59, 59); font-family: 宋體; white-space: normal; background-color: rgb(255, 255, 255);"><span style="font-family: 宋體, SimSun; font-size: 16px;"><br/></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(59, 59, 59); font-family: 宋體; white-space: normal; background-color: rgb(255, 255, 255);"><span style="font-family: 宋體, SimSun; font-size: 16px;">由于電機對地電容很大當(dāng)進行交流耐壓試驗時需要容量較大的試驗設(shè)備。而直流耐壓時沒有電容電流，因而可以用小容量的設(shè)備，減少了試驗設(shè)備體積和投資。</span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(59, 59, 59); font-family: 宋體; white-space: normal; background-color: rgb(255, 255, 255);"><span style="font-family: 宋體, SimSun; font-size: 16px;"><br/></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(59, 59, 59); font-family: 宋體; white-space: normal; background-color: rgb(255, 255, 255);"><span style="font-family: 宋體, SimSun; font-size: 16px;">直流耐壓試驗時，絕緣中不存在介質(zhì)損耗，不會使絕緣發(fā)熱；而交流耐壓試驗時，會發(fā)生介質(zhì)損耗，致使絕緣發(fā)熱。</span></p><p style="text-align: center"><img style="max-width:800px;max-height:300%;" src="https://img55.chem17.com/9/20240813/638591356157364492816.png" title="(572TD%U{_B~HBXQ2~E`0HM.png" alt="(572TD%U{_B~HBXQ2~E`0HM.png"/></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(59, 59, 59); font-family: 宋體; white-space: normal; background-color: rgb(255, 255, 255);"><span style="font-family: 宋體, SimSun; font-size: 16px;"><br/></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(59, 59, 59); font-family: 宋體; white-space: normal; background-color: rgb(255, 255, 255);"><span style="font-family: 宋體, SimSun; font-size: 16px;">直流耐壓試驗可以根據(jù)三相泄露電流與電壓的關(guān)系特性，可容易地發(fā)現(xiàn)絕緣內(nèi)部缺陷。這是因為被試電機絕緣存在有局部缺陷或者絕緣普遍惡化的情況下，升高電壓時，泄露電流將按指</span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(59, 59, 59); font-family: 宋體; white-space: normal; background-color: rgb(255, 255, 255);"><span style="font-family: 宋體, SimSun; font-size: 16px;"><br/></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(59, 59, 59); font-family: 宋體; white-space: normal; background-color: rgb(255, 255, 255);"><span style="font-family: 宋體, SimSun; font-size: 16px;">數(shù)曲線關(guān)系增長，造成三相泄露電流不平衡，但對于良好的絕緣，則電流上升很小，而三相泄露電流是近似平衡的。</span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(59, 59, 59); font-family: 宋體; white-space: normal; background-color: rgb(255, 255, 255);"><span style="font-family: 宋體, SimSun; font-size: 16px;"></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(59, 59, 59); font-family: 宋體; white-space: normal; background-color: rgb(255, 255, 255);"><span style="font-family: 宋體, SimSun; font-size: 16px;"><br/></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(59, 59, 59); font-family: 宋體; white-space: normal; background-color: rgb(255, 255, 255);"><span style="font-family: 宋體, SimSun; font-size: 16px;">而在交流耐壓試驗時，當(dāng)絕緣內(nèi)部存在缺陷且在一定交流試驗電壓下尚不能使絕緣擊穿時三相充電電流差別不是很大，因此電機內(nèi)部缺陷無法發(fā)現(xiàn)。這是因為交流耐壓試驗時的電容電流</span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(59, 59, 59); font-family: 宋體; white-space: normal; background-color: rgb(255, 255, 255);"><span style="font-family: 宋體, SimSun; font-size: 16px;"><br/></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(59, 59, 59); font-family: 宋體; white-space: normal; background-color: rgb(255, 255, 255);"><span style="font-family: 宋體, SimSun; font-size: 16px;">比直流耐壓時的電導(dǎo)電流要大很多倍,由于缺陷部分而引起的有效電流的增加對總的電流來說是很微小的,故不易從總電流的變化來發(fā)現(xiàn)絕緣缺陷。</span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(59, 59, 59); font-family: 宋體; white-space: normal; background-color: rgb(255, 255, 255);"><span style="font-family: 宋體, SimSun; font-size: 16px;"> </span></p><p style="text-align: center"><img style="max-width:800px;max-height:300%;" src="https://img54.chem17.com/9/20240813/638591357477772907748.png" title="$VGV(GKJDQ~1KZD~IBQ_M2M.png" alt="$VGV(GKJDQ~1KZD~IBQ_M2M.png"/></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(59, 59, 59); font-family: 宋體; white-space: normal; background-color: rgb(255, 255, 255);"><span style="font-family: 宋體, SimSun; font-size: 16px;"></span><br/></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(59, 59, 59); font-family: 宋體; white-space: normal; background-color: rgb(255, 255, 255);"><span style="font-size: 16px; font-family: 宋體, SimSun;"><br/></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(59, 59, 59); font-family: 宋體; white-space: normal; background-color: rgb(255, 255, 255);"><span style="font-size: 16px; font-family: 宋體, SimSun;">直流耐壓試驗容易發(fā)現(xiàn)電機端部絕緣的缺陷，而交流耐壓試驗容易發(fā)現(xiàn)槽部和槽口的絕緣缺陷這是因為在交流耐壓試驗時,端部導(dǎo)線與絕緣表之間存在分布電容，端部導(dǎo)線的電容電流通過</span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(59, 59, 59); font-family: 宋體; white-space: normal; background-color: rgb(255, 255, 255);"><span style="font-size: 16px; font-family: 宋體, SimSun;"><br/></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(59, 59, 59); font-family: 宋體; white-space: normal; background-color: rgb(255, 255, 255);"><span style="font-size: 16px; font-family: 宋體, SimSun;">分布電容沿著絕緣表面流向接地的定子鐵芯。這樣在絕緣表面產(chǎn)生了顯著的電壓降離鐵芯愈遠的端部導(dǎo)線與絕緣表面之間的電位差就愈小，因此，不能有效的發(fā)現(xiàn)端部的絕緣缺陷。</span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(59, 59, 59); font-family: 宋體; white-space: normal; background-color: rgb(255, 255, 255);"><span style="font-family: 宋體, SimSun; font-size: 16px;"><br/></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(59, 59, 59); font-family: 宋體; white-space: normal; background-color: rgb(255, 255, 255);"><span style="font-family: 宋體, SimSun; font-size: 16px;">而在直流耐壓時，不存在電容電流，只有很小的電導(dǎo)電流，故沿著絕緣表面也就沒有顯著的電壓降，且電壓降的分布也比較均勻，因此，不論離鐵芯多遠，端部導(dǎo)線與絕緣表面之間的電</span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(59, 59, 59); font-family: 宋體; white-space: normal; background-color: rgb(255, 255, 255);"><span style="font-family: 宋體, SimSun; font-size: 16px;"><br/></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(59, 59, 59); font-family: 宋體; white-space: normal; background-color: rgb(255, 255, 255);"><span style="font-family: 宋體, SimSun; font-size: 16px;">位差都是相當(dāng)高的,這樣就能比較容易發(fā)現(xiàn)端部絕緣的局部缺陷。這些解釋可以從表一所列的試驗統(tǒng)計資料得到驗證。</span></p><p><br/></p> <div id="iqaqewgi6e" class="clear"></div> </div> <div id="iqaqewgi6e" class="article"> <p>上一篇：<a href="/Article-3780741.html">大地網(wǎng)接地電阻測試儀使用方法</a></p> <p>下一篇：<a href="/Article-3776678.html">10kV電纜交流耐壓試驗主要試驗設(shè)備的選型</a></p> </div> <div id="iqaqewgi6e" class="clear"></div> </div> </div> <div id="iqaqewgi6e" class="n-9"> <div 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附件和配件</a></li> <li><a href="/SonList-1327096.html">> 研發(fā)訂制產(chǎn)品</a></li> </ul> </div> </li> <li><a href="/ParentList-1354476.html" onmouseover="showsubmenu('測試夾')" class="yj">測試夾</a> <div class="iqaqewgi6e" id="submenu_測試夾" style="display:none"> <ul> <li><a href="/SonList-1354488.html">> ZCQ系列電力測試鉗</a></li> <li><a href="/SonList-1354486.html">> 電力測試導(dǎo)線</a></li> <li><a href="/SonList-1354485.html">> JXZ系列接線柱（插座）</a></li> <li><a href="/SonList-1354483.html">> 測試夾</a></li> <li><a href="/SonList-1354481.html">> 高壓硅膠絕緣試驗電纜</a></li> <li><a href="/SonList-1354480.html">> 接線柱</a></li> <li><a href="/SonList-1354479.html">> 測試電力導(dǎo)線包</a></li> </ul> </div> </li> <li><a href="/ParentList-1332628.html" onmouseover="showsubmenu('電器電阻測試儀')" class="yj">電器電阻測試儀</a> <div class="iqaqewgi6e" id="submenu_電器電阻測試儀" style="display:none"> <ul> <li><a href="/SonList-1332641.html">> 新品推薦</a></li> <li><a href="/SonList-1332639.html">> 元器件參數(shù)測試儀器</a></li> <li><a href="/SonList-1332638.html">> 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