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回路電阻測(cè)試儀使用過程中的異常處理</div> <div id="tueciplt7sn" class="about_con"> <h1 class="newstit">回路電阻測(cè)試儀使用過程中的異常處理</h1> <div id="tueciplt7sn" class="newstime"> <span id="tueciplt7sn" class="skim"><em>瀏覽次數(shù)：</em>918</span><span id="tueciplt7sn" class="skimtim"><em>發(fā)布日期：</em>2021-06-09 </span> </div> <p style="background-color: rgb(255, 255, 255); box-sizing: border-box; color: rgb(85, 85, 85); font-family: 宋體; font-size: 14px; font-stretch: normal; font-style: normal; font-variant: normal; font-weight: 400; letter-spacing: normal; line-height: 26px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; orphans: 2; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: left; text-decoration: none; text-indent: 0px; text-transform: none; -webkit-text-stroke-width: 0px; white-space: normal; word-spacing: 0px;"><span style="box-sizing: border-box; color: rgb(0, 0, 0);">回路電阻測(cè)試儀現(xiàn)場(chǎng)試驗(yàn)常見問題：</span></p><p style="background-color: rgb(255, 255, 255); box-sizing: border-box; color: rgb(85, 85, 85); font-family: 宋體; font-size: 14px; font-stretch: normal; font-style: normal; font-variant: normal; font-weight: 400; letter-spacing: normal; line-height: 26px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; orphans: 2; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: left; text-decoration: none; text-indent: 0px; text-transform: none; -webkit-text-stroke-width: 0px; white-space: normal; word-spacing: 0px;"><span style="box-sizing: border-box; color: rgb(0, 0, 0);">1、電壓接線回路開路或接觸不佳(接線開路時(shí)可視接觸電阻無窮大)，測(cè)試周圍有較強(qiáng)的電磁干擾時(shí)，如母線帶電，此時(shí)帶電母線通過以空氣為介質(zhì)的電容，干擾測(cè)試儀的兩條電壓測(cè)試線，由于干擾的作用使回路測(cè)試儀電壓采集線兩端出現(xiàn)差模電壓。</span></p><p style="background-color: rgb(255, 255, 255); box-sizing: border-box; color: rgb(85, 85, 85); font-family: 宋體; font-size: 14px; font-stretch: normal; font-style: normal; font-variant: normal; font-weight: 400; letter-spacing: normal; line-height: 26px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; orphans: 2; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: left; text-decoration: none; text-indent: 0px; text-transform: none; -webkit-text-stroke-width: 0px; white-space: normal; word-spacing: 0px;"><span style="box-sizing: border-box; color: rgb(0, 0, 0);">假如外界干擾較大，會(huì)使回路電阻測(cè)試儀顯示出比被試品電阻值大的多的數(shù)值，此時(shí)如果測(cè)試人員有足夠的現(xiàn)場(chǎng)測(cè)試經(jīng)驗(yàn)也許能夠判斷出測(cè)試結(jié)果的異常，并解決這一問題，能夠引起注意并*終得到正確測(cè)試結(jié)果。但如果測(cè)試人員沒有足夠的經(jīng)驗(yàn)可能會(huì)誤判開關(guān)回路電阻值超標(biāo)，可能會(huì)采用停電檢修的方法處理缺陷，給日后的電力生產(chǎn)造成不必要的損失。</span></p><p style="background-color: rgb(255, 255, 255); box-sizing: border-box; color: rgb(85, 85, 85); font-family: 宋體; font-size: 14px; font-stretch: normal; font-style: normal; font-variant: normal; font-weight: 400; letter-spacing: normal; line-height: 26px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; orphans: 2; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: left; text-decoration: none; text-indent: 0px; text-transform: none; -webkit-text-stroke-width: 0px; white-space: normal; word-spacing: 0px;"><span style="box-sizing: border-box; color: rgb(0, 0, 0);">如果干擾的強(qiáng)度不是很大，回路電阻測(cè)試儀顯示值正好在斷路器的合格阻值范圍之內(nèi)，該情形與情況“電壓回路接觸不佳”產(chǎn)生的結(jié)果相同，同樣會(huì)造成誤判。</span></p><p style="background-color: rgb(255, 255, 255); box-sizing: border-box; color: rgb(85, 85, 85); font-family: 宋體; font-size: 14px; font-stretch: normal; font-style: normal; font-variant: normal; font-weight: 400; letter-spacing: normal; line-height: 26px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; orphans: 2; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: left; text-decoration: none; text-indent: 0px; text-transform: none; -webkit-text-stroke-width: 0px; white-space: normal; word-spacing: 0px;"><span style="box-sizing: border-box; color: rgb(0, 0, 0);">2、電壓接線回路開路，打開回路電阻測(cè)試儀，測(cè)試現(xiàn)場(chǎng)沒有強(qiáng)電場(chǎng)干擾，這種情況下，由于放大器輸入的差模電壓基本不存在，故儀器顯示的測(cè)試參數(shù)接近為0，如果測(cè)試人員有足夠的現(xiàn)場(chǎng)測(cè)試經(jīng)驗(yàn)，可以判斷出是儀器電壓回路測(cè)試線異常，將儀器電壓回路測(cè)試線異常排除后，可以得出*終正確測(cè)試結(jié)果;反之，有可能會(huì)誤判回路電阻測(cè)試儀出現(xiàn)問題，中斷測(cè)試，更換或返修儀器，延誤停電時(shí)間，給測(cè)試工作帶來不必要的麻煩。</span></p><p style="background-color: rgb(255, 255, 255); box-sizing: border-box; color: rgb(85, 85, 85); font-family: 宋體; font-size: 14px; font-stretch: normal; font-style: normal; font-variant: normal; font-weight: 400; letter-spacing: normal; line-height: 26px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; orphans: 2; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: left; text-decoration: none; text-indent: 0px; text-transform: none; -webkit-text-stroke-width: 0px; white-space: normal; word-spacing: 0px;"><span style="box-sizing: border-box; color: rgb(0, 0, 0);">3、電壓回路接線接觸不佳，大多數(shù)情況下斷路器的接線端子在長(zhǎng)期運(yùn)行后端子排外表面會(huì)產(chǎn)生氧化膜或油膜，當(dāng)回路電阻測(cè)試儀的電壓測(cè)試鉗夾接到這樣的端子排上時(shí)就可能產(chǎn)生接觸不佳，既電壓測(cè)試線鉗夾本身也要產(chǎn)生一定的接觸電阻，該接觸電阻值達(dá)到與電壓采樣回路的內(nèi)阻值相當(dāng)時(shí)，將對(duì)測(cè)試結(jié)果產(chǎn)生嚴(yán)重影響。</span></p> <div class="tueciplt7sn" id="news_sx"><li id="tueciplt7sn" class="sx_left">上一篇：<a href="/Article-398680.html">回路電阻測(cè)試儀故障分析與排除</a> <br />下一篇：<a href="/Article-395851.html">采用微電腦技術(shù)的微機(jī)繼電器保護(hù)測(cè)試儀性能可靠且操作簡(jiǎn)單</a></li></div> </div> </div> </div> </div> <script type="text/javascript"> $(document).ready(function(e) { $(".about_con img").each(function(index, element) { $(this).attr('style', 'max-width:100%'); }); }); </script> <div id="tueciplt7sn" class="clear"></div>  <div id="tueciplt7sn" class="ly_foot"> <div id="tueciplt7sn" class="ft_main"> <div id="tueciplt7sn" class="ft_contact"> <em>Contact Us</em> <ul> <li><img 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