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class="now_position">  <strong>您正在访问:</strong> <a href="http://salescamper.com/" target="_blank">网站首页</a> >> <a href="/Technology/" target="_blank">技术中?/a> >> <a href="/Article/ArticleList32/" target="_blank">电气百科</a> >> <span>正文</span></div> <!-- main_content begin--> <div id="nsev3iiik" class="maincontent"> <!-- left begin --> <div id="nsev3iiik" class="news_left"> <div id="nsev3iiik" class="brand_news_details"> <h1>电气百科:变压器预防性试验方法,这些你都懂吗?/h1><table style="border-bottom:1px dotted #e4e4e4;" align="center"><tr><td><div id="nsev3iiik" class="news_mes">文章来源:电老虎?作者:??点击?span id="HitNum"></span>?时间?span id="dTime">2019/6/12 16:30:42</span><input type="hidden" id="ID" value="100898257"/><input type="hidden" id="TypeID" value="2"/></div> </td> <td><div id="ckepop"></div></td></tr></table><div id="Content" style="display:none;">[电气百科:变压器预防性试验方法,这些你都懂吗?]:预防性试验的重要性电力变压器是电力系统中最为庞大和重要的变电设备之一,在变压器的维护检修、运行工作中,必须认真执行电气设备预防性试验规程,坚持预防为主,使设备能够长周期、安全、可靠运行,防患于未然?...</div><div id="nsev3iiik" class="brand_news_con"><p style="text-indent:2em;"> 预防性试验的重要?</p> <p style="text-indent:2em;"> 电力变压器是电力系统中最为庞大和重要的变电设备之一,在变压器的维护检修、运行工作中,必须认真执行电气设备预防性试验规程,坚持预防为主,使设备能够长周期、安全、可靠运行,防患于未然?</p> <p style="text-align:center;text-indent:2em;"> <img src="http://oss.cnelc.com/kindeditor/img/20190612/20190612162955_1071.png" alt="" /> </p> <p style="text-indent:2em;"> 1、预防性试验的分类 </p> <p style="text-indent:2em;"> 11,交流耐压试验 </p> <p style="text-indent:2em;"> 12,直流耐压试验 </p> <p style="text-indent:2em;"> 13,直流电阻试?</p> <p style="text-indent:2em;"> 1.4,回路电阻试?</p> <p style="text-indent:2em;"> 1.5,介质损耗角试验 </p> <p style="text-indent:2em;"> 1.6,绝缘试?</p> <p style="text-indent:2em;"> ······ </p> <p style="text-indent:2em;"> 2、试验方法: </p> <p style="text-indent:2em;"> 21,交流耐压试验:外施工频耐压试验是将被试绕组首尾短接,施加试验电压,考察变压器主绝缘和端绝缘的强度,对设备的安全运行具有重要意义。交流耐压试验对固体有机绝缘来说属于破坏性试验,会使原来存在的绝缘弱点进一步发展,使绝缘强度逐渐降低,形成绝缘内部劣化的累积效应。因此必须正确的选择试验电压标准和耐压时间。试验电压越高,发现绝缘缺陷的有效性更高,但被试品被击穿的可能性更大?</p> <p style="text-indent:2em;"> 2.2,直流耐压试验:是一种破坏性试验,试验前应对电力电缆的绝缘电阻、泄露电流进行非破坏性试验,若试验结果正常,方能进行直流耐压试验,若发现电缆的绝缘状况有问题,通常应先进行处理后再做直流耐压试验?</p> <p style="text-indent:2em;"> 升压必须从零(或接近零)开始(仪器一般都没有回零启动开关——不到?”位,不能启动)升压速度?5%试验电压前可以任意,不宜太快?</p> <p style="text-indent:2em;"> 2.3,直流电阻试验:直流电阻测试仪作为一种基本测试仪器应用范围极为广泛,一般应用在电力系统的变压器、互感器、各种线圈(断路器分合闸线圈的精确测量)等诸多设备。变压器绕组(绕组连同套管)的直流电阻测试是变压器在交接、大修和分接开关更换及检修后,必不可少的基本试验项目,也是故障后的重要试验?</p> <p style="text-indent:2em;"> 24,回路电阻试验:变压器回路电阻测试仪主要是用于测试高压断路器动静触头的接触电阻,断路器导电回路电阻主要取决于动静触头的接触电阻,接触电阻的存在增大导体在通电时的损耗,使接触处的温度升高,其值的大小直接影响正常工作时的载流能力,在一定程度上影响短路电流的切断能力,也是反映安装检修工作质量的重要数据。(目前回路电阻测试仪的主要测试方法:电桥法、电压降法、微欧仪法) </p> <p style="text-indent:2em;"> 2.5,介质损耗角试验:介质损耗因数tanб测量:是绝缘预防性试验的重要项目之一,在交流电压作用下,流过介质的电流右两部分组成,即通过Cx的电流Icx,和通过Rx的电流IRx。通常Icx〈〈IRx.介质损失角б甚小?</p> <p style="text-indent:2em;"> 26,绝缘试验(绝缘电阻和吸收比的测定):电力变压器绝缘电阻和吸收比的测量,主要是指线圈之间比及线圈对地之间的绝缘电阻和吸收比的测量。测定绝缘电阻和吸收比可以灵敏地发现变压器绝缘的整体或局部受潮;检查绝缘表面的脏污及局部缺陷;检查有无短路、接地和瓷件破损等缺陷?</p> <p style="text-indent:2em;"> 3、变压器维护 </p> <p style="text-indent:2em;"> 3.1,检查并消除已发现而就地能消除的缺?</p> <p style="text-indent:2em;"> 32,检查清扫套管,配合预防性试验,拆引线接头,校紧接头螺丝 </p> <p style="text-indent:2em;"> 3.3,外壳与散热器的清扫和检查,处理渗漏油,必要的补漆或重涂?</p> <p style="text-indent:2em;"> 3.4,检查冷却系统,风扇、电机、油泵、控制回路,处理发现的缺?</p> <p style="text-indent:2em;"> 3.5,取油样更换和过滤不合格的绝缘油及补充油 </p> <p style="text-indent:2em;"> 3.6,检查瓦斯继电器和保护装?</p> <p style="text-indent:2em;"> 3.7,油枕的检?</p> <p style="text-indent:2em;"> 3.8,呼吸器的检查、更换变色硅?</p> <p style="text-indent:2em;"> 3.9,检查各部阀门和密封?</p> <p style="text-indent:2em;"> 310,必要时作套管电流互感器的特性试?</p></div><div id="nsev3iiik" class="meneame"><span class="disabled">< </span><span class="current">1</span> <span class="disabled">> </span></div> <div id="nsev3iiik" style="text-align: center;padding-top: 10px;"><img src="/images/code.jpg" alt="关注有惊?" /></div> <div id="nsev3iiik" class="news_bot_mes">中国工业电器网:此内容转载于合作媒体或互联网其它网站,中国工业电器网登载此文出于传递更多信息之目的,并不意味着赞同其观点或证实其描述!</br>新闻、技术文章投稿QQ?28246603 邮箱:news@cnelc.com</div> <h2 class="related">相关阅读</h2> <ul class="related_con"> 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