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onblur="if(this.value=='')this.value='請輸入您要查詢的產(chǎn)品'" onfocus="this.value=''" value="請輸入您要查詢的產(chǎn)品" type="text" class="search-txt"> <input name="" type="submit" class="search-btn" value=""> </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> > 絕緣子的絕緣耐壓試驗(yàn)方法</span></div>  <div id="iqaqewgi6e" class="n-3 c-news"> <div id="iqaqewgi6e" class="newsnr"> <h1>絕緣子的絕緣耐壓試驗(yàn)方法</h1> <p class="source"><span>日期：2019-07-07</span><span>瀏覽：3175次</span></p> <div> <p style="border: 0px none; margin: 0px; padding: 0px; outline: 0px; line-height: 28px; text-indent: 24px; font-size: 12px; font-family: 宋體;"><span style="font-size:14px">康登電氣生產(chǎn)支柱絕緣子和懸式絕緣子的預(yù)防性試驗(yàn)項(xiàng)目主要包括：零值絕緣子檢測、絕緣電阻測量、交流耐壓試驗(yàn)、絕緣子表面污穢物的等值鹽密測定等。</span></p><p style="border: 0px none; margin: 0px; padding: 0px; outline: 0px; line-height: 28px; text-indent: 24px; font-size: 12px; font-family: 宋體;"><span style="font-size:14px">1.絕緣電阻的測試</span></p><p style="border: 0px none; margin: 0px; padding: 0px; outline: 0px; line-height: 28px; text-indent: 24px; font-size: 12px; font-family: 宋體;"><span style="font-size:14px">清潔干燥的良好絕緣子，其絕緣電阻是很高的。電瓷有裂紋時，絕緣電阻一般也沒有明顯的降低。當(dāng)電瓷龜裂處有濕氣及灰塵、臟污入侵后，絕緣電阻將顯著下降，僅為數(shù)百甚至數(shù)十兆歐，用康登電氣生產(chǎn)的兆歐表可以明顯地檢出。測量多元件支柱絕緣子每一元件的絕緣電阻時，應(yīng)在分層膠合處繞銅線，然后接到兆歐表上，以免在不同位置測得的絕緣電阻數(shù)值相差太大，造成誤判斷?！兑?guī)程》規(guī)定，用2500V兆歐表測量絕緣電阻時，多元件支柱絕緣子和每片懸式絕緣子的絕緣電阻不應(yīng)低于300MΩ。500kV懸式絕緣子的絕緣電阻不低于500MΩ。</span></p><p style="border: 0px none; margin: 0px; padding: 0px; outline: 0px; line-height: 28px; text-indent: 24px; font-size: 12px; font-family: 宋體;"><span style="font-size:14px">2.交流耐壓試驗(yàn)</span></p><p style="border: 0px none; margin: 0px; padding: 0px; outline: 0px; line-height: 28px; text-indent: 24px; font-size: 12px; font-family: 宋體;"><span style="font-size:14px">對于單元件的支柱絕緣子，交流耐壓目前是有效、簡易的試驗(yàn)方法。預(yù)防性試驗(yàn)時，可用交流耐壓試驗(yàn)代替測量電壓分布和絕緣電阻，或用它來后判斷用上述方法檢出的絕緣子。</span></p><p style="border: 0px none; margin: 0px; padding: 0px; outline: 0px; line-height: 28px; text-indent: 24px; font-size: 12px; font-family: 宋體;"><span style="font-size:14px">對于絕緣子的交流耐壓試驗(yàn)，各級電壓的支柱絕緣子和懸式絕緣子的交流耐壓試驗(yàn)電壓標(biāo)準(zhǔn)見表1-1和表1-2。按試驗(yàn)電壓標(biāo)準(zhǔn)耐壓1min，在升壓和耐壓過程中不發(fā)生跳弧為合格。</span></p><p style="border: 0px none; margin: 0px; padding: 0px; outline: 0px; line-height: 28px; text-indent: 24px; font-size: 12px; font-family: 宋體;"><span style="font-size:14px">表1-1 支柱絕緣子的交流耐壓試驗(yàn)標(biāo)準(zhǔn)（kV）</span></p><p style="border: 0px none; margin: 0px; padding: 0px; outline: 0px; line-height: 28px; text-indent: 24px; font-size: 12px; font-family: 宋體;"> </p><table align="center" style="font-family:宋體; font-size:12px; width:650px"><tbody><tr><td colspan="2" style="width: 200px;"><p style="border: 0px none; margin: 0px; padding: 0px; outline: 0px; line-height: 28px; text-indent: 24px;"><span style="font-size:14px">額定電壓</span></p></td><td style="width: 75px;"><p style="border: 0px none; margin: 0px; padding: 0px; outline: 0px; line-height: 28px; text-indent: 24px;"><span style="font-size:14px">3</span></p></td><td style="width: 75px;"><p style="border: 0px none; margin: 0px; padding: 0px; outline: 0px; line-height: 28px; text-indent: 24px;"><span style="font-size:14px">6</span></p></td><td style="width: 75px;"><p style="border: 0px none; margin: 0px; padding: 0px; outline: 0px; line-height: 28px; text-indent: 24px;"><span style="font-size:14px">10</span></p></td><td style="width: 75px;"><p style="border: 0px none; margin: 0px; padding: 0px; outline: 0px; line-height: 28px; text-indent: 24px;"><span style="font-size:14px">15</span></p></td><td style="width: 75px;"><p style="border: 0px none; margin: 0px; padding: 0px; outline: 0px; line-height: 28px; text-indent: 24px;"><span style="font-size:14px">20</span></p></td><td style="width: 75px;"><p style="border: 0px none; margin: 0px; padding: 0px; outline: 0px; line-height: 28px; text-indent: 24px;"><span style="font-size:14px">35</span></p></td></tr><tr><td colspan="2" style="width: 200px;"><p style="border: 0px none; margin: 0px; padding: 0px; outline: 0px; line-height: 28px; text-indent: 24px;"><span style="font-size:14px">高工作電壓</span></p></td><td style="width: 75px;"><p style="border: 0px none; margin: 0px; padding: 0px; outline: 0px; line-height: 28px; text-indent: 24px;"><span style="font-size:14px">3.5</span></p></td><td style="width: 75px;"><p style="border: 0px none; margin: 0px; padding: 0px; outline: 0px; line-height: 28px; text-indent: 24px;"><span style="font-size:14px">6.9</span></p></td><td style="width: 75px;"><p style="border: 0px none; margin: 0px; padding: 0px; outline: 0px; line-height: 28px; text-indent: 24px;"><span style="font-size:14px">11.5</span></p></td><td style="width: 75px;"><p style="border: 0px none; margin: 0px; padding: 0px; outline: 0px; line-height: 28px; text-indent: 24px;"><span style="font-size:14px">17.5</span></p></td><td style="width: 75px;"><p style="border: 0px none; margin: 0px; padding: 0px; outline: 0px; line-height: 28px; text-indent: 24px;"><span style="font-size:14px">23</span></p></td><td style="width: 75px;"><p style="border: 0px none; margin: 0px; padding: 0px; outline: 0px; line-height: 28px; text-indent: 24px;"><span style="font-size:14px">40.5</span></p></td></tr><tr><td rowspan="2" style="width: 125px;"><p style="border: 0px none; margin: 0px; padding: 0px; outline: 0px; line-height: 28px; text-indent: 24px;"><span style="font-size:14px">純瓷和充油絕緣</span></p></td><td style="width: 75px;"><p style="border: 0px none; margin: 0px; padding: 0px; outline: 0px; line-height: 28px; text-indent: 24px;"><span style="font-size:14px">出廠</span></p></td><td style="width: 75px;"><p style="border: 0px none; margin: 0px; padding: 0px; outline: 0px; line-height: 28px; text-indent: 24px;"><span style="font-size:14px">25</span></p></td><td style="width: 75px;"><p style="border: 0px none; margin: 0px; padding: 0px; outline: 0px; line-height: 28px; text-indent: 24px;"><span style="font-size:14px">32</span></p></td><td style="width: 75px;"><p style="border: 0px none; margin: 0px; padding: 0px; outline: 0px; line-height: 28px; text-indent: 24px;"><span style="font-size:14px">42</span></p></td><td style="width: 75px;"><p style="border: 0px none; margin: 0px; padding: 0px; outline: 0px; line-height: 28px; text-indent: 24px;"><span style="font-size:14px">57</span></p></td><td style="width: 75px;"><p style="border: 0px none; margin: 0px; padding: 0px; outline: 0px; line-height: 28px; text-indent: 24px;"><span style="font-size:14px">68</span></p></td><td style="width: 75px;"><p style="border: 0px none; margin: 0px; padding: 0px; outline: 0px; line-height: 28px; text-indent: 24px;"><span style="font-size:14px">100</span></p></td></tr><tr><td style="width: 75px;"><p style="border: 0px none; margin: 0px; padding: 0px; outline: 0px; line-height: 28px; text-indent: 24px;"><span style="font-size:14px">交接和大修</span></p></td><td style="width: 75px;"><p style="border: 0px none; margin: 0px; padding: 0px; outline: 0px; line-height: 28px; text-indent: 24px;"><span style="font-size:14px">25</span></p></td><td style="width: 75px;"><p style="border: 0px none; margin: 0px; padding: 0px; outline: 0px; line-height: 28px; text-indent: 24px;"><span style="font-size:14px">32</span></p></td><td style="width: 75px;"><p style="border: 0px none; margin: 0px; padding: 0px; outline: 0px; line-height: 28px; text-indent: 24px;"><span style="font-size:14px">42</span></p></td><td style="width: 75px;"><p style="border: 0px none; margin: 0px; padding: 0px; outline: 0px; line-height: 28px; text-indent: 24px;"><span style="font-size:14px">57</span></p></td><td style="width: 75px;"><p style="border: 0px none; margin: 0px; padding: 0px; outline: 0px; line-height: 28px; text-indent: 24px;"><span style="font-size:14px">68</span></p></td><td style="width: 75px;"><p style="border: 0px none; margin: 0px; padding: 0px; outline: 0px; line-height: 28px; text-indent: 24px;"><span style="font-size:14px">100</span></p></td></tr><tr><td rowspan="2" style="width: 125px;"><p style="border: 0px none; margin: 0px; padding: 0px; outline: 0px; line-height: 28px; text-indent: 24px;"><span style="font-size:14px">固體有機(jī)絕緣</span></p></td><td style="width: 75px;"><p style="border: 0px none; margin: 0px; padding: 0px; outline: 0px; line-height: 28px; text-indent: 24px;"><span style="font-size:14px">出廠</span></p></td><td style="width: 75px;"><p style="border: 0px none; margin: 0px; padding: 0px; outline: 0px; line-height: 28px; text-indent: 24px;"><span style="font-size:14px">25</span></p></td><td style="width: 75px;"><p style="border: 0px none; margin: 0px; padding: 0px; outline: 0px; line-height: 28px; text-indent: 24px;"><span style="font-size:14px">32</span></p></td><td style="width: 75px;"><p style="border: 0px none; margin: 0px; padding: 0px; outline: 0px; line-height: 28px; text-indent: 24px;"><span style="font-size:14px">42</span></p></td><td style="width: 75px;"><p style="border: 0px none; margin: 0px; padding: 0px; outline: 0px; line-height: 28px; text-indent: 24px;"><span style="font-size:14px">57</span></p></td><td style="width: 75px;"><p style="border: 0px none; margin: 0px; padding: 0px; outline: 0px; line-height: 28px; text-indent: 24px;"><span style="font-size:14px">68</span></p></td><td style="width: 75px;"><p style="border: 0px none; margin: 0px; padding: 0px; outline: 0px; line-height: 28px; text-indent: 24px;"><span style="font-size:14px">100</span></p></td></tr><tr><td style="width: 75px;"><p style="border: 0px none; margin: 0px; padding: 0px; outline: 0px; line-height: 28px; text-indent: 24px;"><span style="font-size:14px">交接和大修</span></p></td><td style="width: 75px;"><p style="border: 0px none; margin: 0px; padding: 0px; outline: 0px; line-height: 28px; text-indent: 24px;"><span style="font-size:14px">22</span></p></td><td style="width: 75px;"><p style="border: 0px none; margin: 0px; padding: 0px; outline: 0px; line-height: 28px; text-indent: 24px;"><span style="font-size:14px">28</span></p></td><td style="width: 75px;"><p style="border: 0px none; margin: 0px; padding: 0px; outline: 0px; line-height: 28px; text-indent: 24px;"><span style="font-size:14px">38</span></p></td><td style="width: 75px;"><p style="border: 0px none; margin: 0px; padding: 0px; outline: 0px; line-height: 28px; text-indent: 24px;"><span style="font-size:14px">50</span></p></td><td style="width: 75px;"><p style="border: 0px none; margin: 0px; padding: 0px; outline: 0px; line-height: 28px; text-indent: 24px;"><span style="font-size:14px">59</span></p></td><td style="width: 75px;"><p style="border: 0px none; margin: 0px; padding: 0px; outline: 0px; line-height: 28px; text-indent: 24px;"><span style="font-size:14px">90</span></p></td></tr></tbody></table><p style="border: 0px none; margin: 0px; padding: 0px; outline: 0px; line-height: 28px; text-indent: 24px; font-size: 12px; font-family: 宋體;"><span style="font-size:14px">對運(yùn)行中的35kV變電所內(nèi)的支柱絕緣子，可以連同母線進(jìn)行整體耐壓，試驗(yàn)電壓為100kV，時間為1min。耐壓完畢后，必須測量各膠合元件的絕緣電阻，以檢出不合格的元件。</span></p><p style="border: 0px none; margin: 0px; padding: 0px; outline: 0px; line-height: 28px; text-indent: 24px; font-size: 12px; font-family: 宋體;"><span style="font-size:14px">對于穿墻套管絕緣子，應(yīng)根據(jù)實(shí)際狀態(tài)進(jìn)行加壓。</span></p><p style="border: 0px none; margin: 0px; padding: 0px; outline: 0px; line-height: 28px; text-indent: 24px; font-size: 12px; font-family: 宋體;"><span style="font-size:14px">3.表面污穢物等值鹽密測定</span></p><p style="border: 0px none; margin: 0px; padding: 0px; outline: 0px; line-height: 28px; text-indent: 24px; font-size: 12px; font-family: 宋體;"><span style="font-size:14px">定量評價絕緣子“臟”的程度而使用的為廣泛的一種方法。</span></p><p style="border: 0px none; margin: 0px; padding: 0px; outline: 0px; line-height: 28px; text-indent: 24px; font-size: 12px; font-family: 宋體;"><span style="font-size:14px">等值鹽密法是把絕緣子表面污穢密度按照其導(dǎo)電性轉(zhuǎn)化為單位面積上NaCl含量的一種表示方法。具體來說是用300ml蒸餾水，清洗并溶下一片絕緣子表面的污穢，在另一杯300ml蒸餾水中逐漸放入NaCl，直到2杯水的電導(dǎo)率相同，則用放入的NaCl的量除以絕緣子的面積，所得結(jié)果稱為該絕緣子的等值附鹽密度。</span></p><p style="border: 0px none; margin: 0px; padding: 0px; outline: 0px; line-height: 28px; text-indent: 24px; font-size: 12px; font-family: 宋體;"><span style="font-size:14px">當(dāng)鹽密值超過規(guī)定時，應(yīng)根據(jù)具體情況采取相應(yīng)的清掃措施。</span></p><p style="border: 0px none; margin: 0px; padding: 0px; outline: 0px; line-height: 28px; text-indent: 24px; font-size: 12px; font-family: 宋體;"><span style="font-size:14px">等值鹽密法的zui大yiu點(diǎn)是直觀易懂，便于推廣。其缺點(diǎn)是不反映污穢成分，不反映非電物質(zhì)的含量，不反映污穢在絕緣子上的分布。而污穢又分為4個階段：污穢的沉積、受潮、干區(qū)的形成和局部電弧的發(fā)展，所以等值鹽密法的測量結(jié)果只反映積累污穢的結(jié)果，不反映過程。不能反映局部電弧的發(fā)展?fàn)顩r。</span></p> <div id="iqaqewgi6e" class="clear"></div> </div> <div id="iqaqewgi6e" class="article"> <p>上一篇：<a href="/Article-1898661.html">絕緣油介電強(qiáng)度測定儀的操作方法詳細(xì)說明</a></p> <p>下一篇：<a href="/Article-1890301.html">高壓開關(guān)機(jī)械特性測試儀術(shù)語定義</a></p> </div> <div id="iqaqewgi6e" class="clear"></div> </div> </div> <div id="iqaqewgi6e" class="n-9"> <div id="iqaqewgi6e" class="c-right"> <div id="iqaqewgi6e" class="c-1 r-pro"> <div id="iqaqewgi6e" class="c-left"> <div id="iqaqewgi6e" class="h-2"><a href="/products.html">產(chǎn)品分類</a></div> <ul> <li><a href="/ParentList-1388067.html" onmouseover="showsubmenu('大電流發(fā)生器')" class="yj">大電流發(fā)生器</a> <div class="iqaqewgi6e" id="submenu_大電流發(fā)生器" style="display:none"> <ul> </ul> </div> </li> <li><a href="/ParentList-1384344.html" 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