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<span>文章出處??a href=""><a >深圳市晨飛電子有限公??/a></a></span><span>網(wǎng)責(zé)任編輯：<a >NSW</a></span><span>作者：<a >NSW</a></span><span>人氣??span id="cntrHits">-</span></span><span>發(fā)表時間??012-12-06 14:04:00</span> <div id="31ni06unl0" class="newchang">  <div class="31ni06unl0" id="ckepop"> <a class="jiathis jiathis_txt jtico jtico_jiathis" target="_blank">分享到：</a> <a class="jiathis_button_qzone">QQ空間</a> <a class="jiathis_button_tsina"> 新浪微博</a> <a class="jiathis_button_tqq">騰訊微博</a> <a class="jiathis_button_tsohu">搜狐微博</a> <a class="jiathis_button_t163">網(wǎng)易微博</a> <a class="jiathis_button_tools_1"></a><a class="jiathis_button_tools_2"></a> </div> <script type="text/javascript"> var jiathis_config = { "data_track_clickback": true };</script> <script type="text/javascript" src="http://v2.jiathis.com/code/jia.js?uid=899792" charset="utf-8"></script>  </div> </div> </div> </div> <div class="31ni06unl0" id="cntrBody"> <p style="margin: 0cm 0cm 0pt" class="MsoNormal"><span style="font-family: 宋體; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">迄今為止我國對外</span><b style="mso-bidi-font-weight: normal"><span lang="EN-US"><a href="http://m.linhang.com.cn/"><span style="font-family: 宋體; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'" lang="EN-US"><span lang="EN-US"><font color="#800080">高頻<span lang="EN-US">變壓??/span></font></span></span></a></span></b><span style="font-family: 宋體; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的穿擊理論雖然已經(jīng)進(jìn)行過許多的理論研究，但并未達(dá)到完全統(tǒng)一的地步。目前通用的說法仍然是“小橋”理論。按??ldquo;小橋”理論的說法，認(rèn)為油的擊穿是因?yàn)橛椭泻锌諝?、水分和纖維雜質(zhì)而引起的電場分布的畸變而導(dǎo)致局部電場強(qiáng)度升高的結(jié)果。具體來說，由于水分和雜志的介電常數(shù)高，在電場的作用下，它們很容易按電場方向而極化定向，并沿著電場方向排列從而在電極間形成導(dǎo)??ldquo;小橋”，開始時為漏電痛到，并最終發(fā)展成為擊穿通道??/span><span lang="EN-US"><o:p></o:p></span></p> <p style="margin: 0cm 0cm 0pt" class="MsoNormal"><span lang="EN-US"><o:p><font face="Times New Roman"> </font></o:p></span></p> <p style="margin: 0cm 0cm 0pt" class="MsoNormal"><span style="font-family: 宋體; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">在油??/span><b style="mso-bidi-font-weight: normal"><span lang="EN-US"><a href="http://m.linhang.com.cn/product/"><span style="font-family: 宋體; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'" lang="EN-US"><span lang="EN-US"><font color="#800080">變壓??/font></span></span></a></span></b><span style="font-family: 宋體; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">所采用的油屏障絕緣結(jié)構(gòu)中，其絕緣性能很大程度上取決于油的耐壓強(qiáng)度。油的耐壓強(qiáng)度在理論上是很高的，在試驗(yàn)中曾對特別純凈的油進(jìn)行測試，其耐壓強(qiáng)度高達(dá)</span><span lang="EN-US"><font face="Times New Roman">4000kV/</font></span><span style="font-family: 宋體; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">㎝以上。實(shí)際上用于工廠的凈化后的變壓器油的耐壓強(qiáng)度約為</span><span lang="EN-US"><font face="Times New Roman">200~250kV/</font></span><span style="font-family: 宋體; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">㎝，而在標(biāo)準(zhǔn)的油杯中擊穿電壓一般為</span><span lang="EN-US"><font face="Times New Roman">35kV/2.5</font></span><span style="font-family: 宋體; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">㎜以上，產(chǎn)生這樣大的差異主要是由于變壓器中含有水分和雜質(zhì)等所引起的??/span></p> <p> </p> </div> <div id="31ni06unl0" class="apage" id="showfenye">  <script type="text/javascript"> var pagecont=1; if(pagecont > 2) { var ss = new Cls_jsPage(1, 1, 5, "ss"); ss.setPageSE("woguogaopinbianyaqid_", ".html"); ss.setPageInput("Page"); ss.setUrl(""); ss.setPageFrist("<a disabled='true'class='ob'>首頁</a>", "首頁"); ss.setPagePrev("<a disabled='true'class='ob'>上一??/a>", "上一??); ss.setPageNext("<a disabled='true'class='ob'>下一??/a>", "下一??); ss.setPageLast("<a disabled='true'class='ob'>尾頁</a>", "尾頁"); ss.setPageText("{$PageNum}", "{$PageNum}"); 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