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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> > 為什么需要測量電氣設(shè)備的絕緣電阻</span></div>  <div id="iqaqewgi6e" class="n-3 c-news"> <div id="iqaqewgi6e" class="newsnr"> <h1>為什么需要測量電氣設(shè)備的絕緣電阻</h1> <p class="source"><span>日期：2019-10-11</span><span>瀏覽：4153次</span></p> <div> <p style="margin: 0px; padding: 0px; color: rgb(59, 59, 59); font-family: 宋體; font-size: 14px;">要檢查電氣設(shè)備的絕緣狀態(tài)，測量絕緣電阻是相對簡單方便的輔助辦法，也是目前電力行業(yè)運(yùn)用十分普遍的一項(xiàng)檢測試驗(yàn)方法?，F(xiàn)在普遍是采用絕緣電阻測試儀、兆歐表，測量絕緣介質(zhì)的電阻和吸收比。一般常見的工具是兆歐表、絕緣電阻測試儀，比較*的可以采用可調(diào)式高壓數(shù)字兆歐表、智能絕緣電阻測試儀等設(shè)備。</p><p style="margin: 0px; padding: 0px; color: rgb(59, 59, 59); font-family: 宋體; font-size: 14px;"> 一、為什么要測量電氣設(shè)備的絕緣電阻</p><p style="margin: 0px; padding: 0px; color: rgb(59, 59, 59); font-family: 宋體; font-size: 14px;"> 絕緣體的作用是隔電，包括相線之間的隔電(相間絕緣)和相對地之間的隔電(對地絕緣)。電氣設(shè)備的絕緣要求是不導(dǎo)電，這就需要相當(dāng)高程度的絕緣電阻。對任何一種電氣設(shè)備來說，保證它的相間和對地具有足夠高程度的絕緣電阻，是電氣設(shè)備安全運(yùn)行的重要指標(biāo)之一。因此測量電氣設(shè)備的絕緣電阻是十分重要的一道工序。</p><p style="margin: 0px; padding: 0px; color: rgb(59, 59, 59); font-family: 宋體; font-size: 14px;"> 二、絕緣電阻的老化</p><p style="margin: 0px; padding: 0px; color: rgb(59, 59, 59); font-family: 宋體; font-size: 14px;"> 電氣設(shè)備在長期運(yùn)行的過程中，不可避免地要受到內(nèi)部電、熱和機(jī)械力的作用，還要受到外部大氣(如雨、霧、雷電等)、環(huán)境的、外力的作用。這些因素都可能造成電氣設(shè)備絕緣電阻的老化，降低電氣設(shè)備的隔電能力。隔電能力的持續(xù)降低，終會導(dǎo)致絕緣的*破壞。因此定期對絕緣電阻進(jìn)行測量，及時(shí)排查使絕緣電阻受損失的因素，是電氣設(shè)備安全運(yùn)行的重要保障。</p><p align="center" style="margin: 0px; padding: 0px; color: rgb(59, 59, 59); font-family: 宋體; font-size: 14px;"><img alt="" src="http://img71.chem17.com/9/20191011/637063823157945942196.jpg" style="width:800px" /></p><p style="margin: 0px; padding: 0px; color: rgb(59, 59, 59); font-family: 宋體; font-size: 14px;"> 三、測量絕緣電阻的效果與不足</p><p style="margin: 0px; padding: 0px; color: rgb(59, 59, 59); font-family: 宋體; font-size: 14px;"> 通過對電氣設(shè)備的絕緣電阻的測量，可以有效地反映出設(shè)備絕緣的整體受潮、絕緣中貫穿性通道、絕緣油的油質(zhì)變壞、設(shè)備進(jìn)水絕緣受潮、絕緣瓷套裂紋等缺陷。</p><p style="margin: 0px; padding: 0px; color: rgb(59, 59, 59); font-family: 宋體; font-size: 14px;"> 但是，在某些情況下，絕緣雖然存在某種局部的缺陷(如局部放電)，但相間絕緣和相對地絕緣仍保持良好，絕緣電阻很少下降，甚至沒有損失，測量絕緣電阻不能發(fā)現(xiàn)和判斷這種類型的缺陷，因此需要采用其他試驗(yàn)項(xiàng)目來檢測，如用局部放電檢測儀、局部放電監(jiān)測系統(tǒng)等進(jìn)行局放試驗(yàn)。經(jīng)過綜合的檢測試驗(yàn)，避免危險(xiǎn)情況的發(fā)生。</p> <div id="iqaqewgi6e" class="clear"></div> </div> <div id="iqaqewgi6e" class="article"> <p>上一篇：<a href="/Article-2000349.html">高壓變壓器耐壓試驗(yàn)中應(yīng)注意的幾個(gè)問題</a></p> <p>下一篇：<a href="/Article-1991316.html">直流高壓發(fā)生器使用前準(zhǔn)備及注意事項(xiàng)</a></p> </div> <div id="iqaqewgi6e" class="clear"></div> </div> </div> <div id="iqaqewgi6e" class="n-9"> <div id="iqaqewgi6e" 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<li><a href="/SonList-1324451.html">> 壓接鉗</a></li> <li><a href="/SonList-1324450.html">> 液壓鉗</a></li> </ul> </div> </li> <li><a href="/ParentList-1324332.html" onmouseover="showsubmenu('繞組匝間沖擊耐電壓試驗(yàn)儀')" class="yj">繞組匝間沖擊耐電壓試驗(yàn)儀</a> <div class="iqaqewgi6e" id="submenu_繞組匝間沖擊耐電壓試驗(yàn)儀" style="display:none"> <ul> <li><a href="/SonList-1324343.html">> 耐電壓試驗(yàn)儀</a></li> </ul> </div> </li> <li><a href="/ParentList-1324322.html" onmouseover="showsubmenu('直流高壓發(fā)生器')" class="yj">直流高壓發(fā)生器</a> <div class="iqaqewgi6e" id="submenu_直流高壓發(fā)生器" style="display:none"> <ul> <li><a href="/SonList-1324326.html">> 直流高壓發(fā)生器</a></li> <li><a href="/SonList-1324324.html">> ZGF直流高壓發(fā)生器</a></li> </ul> </div> </li> <li><a href="/ParentList-1324311.html" onmouseover="showsubmenu('電工電修工具設(shè)備總匯')" class="yj">電工電修工具設(shè)備總匯</a> <div class="iqaqewgi6e" id="submenu_電工電修工具設(shè)備總匯" style="display:none"> <ul> <li><a href="/SonList-1324320.html">> 電動切紙機(jī)</a></li> <li><a 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