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宋體;">斷路器導(dǎo)電回路接觸電阻測(cè)試方法與試驗(yàn)注意事項(xiàng)</span></span></strong></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; white-space: normal; background-color: rgb(255, 255, 255); text-align: justify;"><span style="font-size: 12pt;"><span style="font-family: 宋體;">一、測(cè)量導(dǎo)電回路電阻的目的</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; white-space: normal; background-color: rgb(255, 255, 255); text-align: justify;"><span style="font-size: 12pt;"><span style="font-family: 宋體;">　　高壓斷路器導(dǎo)電回路直流回阻包括套管導(dǎo)電桿電阻、導(dǎo)電與觸頭連接處電阻和動(dòng)、靜觸頭之間的接觸電阻等。導(dǎo)電桿電阻一般不會(huì)變化，其他兩處的鏈接電阻和接觸電阻由于各種因素之間的影響(如觸頭表面氧化、觸頭間殘留有機(jī)械雜物或碳化物、接觸壓力下降、接觸面積減小和短路電流燒傷等)，常常有所增加。所以測(cè)量每相導(dǎo)電回路電阻，實(shí)際上是檢查動(dòng)、靜觸頭之間的接觸電阻和連接電阻的變化，主要是判斷動(dòng)、靜觸頭是否接觸良好。運(yùn)行中、動(dòng)、靜、觸頭之間的接觸電阻往往會(huì)增大，使正常運(yùn)行工作電流下發(fā)生過熱，尤其是通過短路電流時(shí)，觸頭發(fā)熱更嚴(yán)重，可能燒傷周圍絕緣或造成觸頭燒溶粘接，從而影響斷路器跳閘時(shí)間和開斷能力，甚至產(chǎn)生拒動(dòng)發(fā)生，所以相關(guān)規(guī)程規(guī)定，斷路器在安裝后、頂起(包括大小修)和開斷短路電流一定次數(shù)后，都要進(jìn)行此項(xiàng)試驗(yàn)。</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; white-space: normal; background-color: rgb(255, 255, 255); text-align: justify;"><span style="font-size: 12pt;"><span style="font-family: 宋體;"> </span></span></p><p style="text-align: center"><img style="max-width:800px;max-height:300%;" src="https://img54.chem17.com/9/20241113/638670811868371992569.png" title="30a30f39-d263-4c6e-8cc4-72f458cd480f.png" alt="30a30f39-d263-4c6e-8cc4-72f458cd480f.png"/></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; white-space: normal; background-color: rgb(255, 255, 255); text-align: justify;"><span style="font-size: 12pt;"><span style="font-family: 宋體;"></span></span><br/></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; white-space: normal; background-color: rgb(255, 255, 255); text-align: justify;"><span style="font-size: 12pt;"><span style="font-family: 宋體;">　　二、試驗(yàn)方法</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; white-space: normal; background-color: rgb(255, 255, 255); text-align: justify;"><span style="font-size: 12pt;"><span style="font-family: 宋體;">　　測(cè)量高壓斷路器導(dǎo)電回路電阻的方法采用直流降壓法。測(cè)量接線原理圖如圖1-1所示。</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; white-space: normal; background-color: rgb(255, 255, 255); text-align: center;"><img alt="" src="https://img72.chem17.com/9/20201015/637383993339871909269.jpg" style="margin: 0px; padding: 0px; border: 0px; max-width: 100%; max-height: 100%; vertical-align: middle; height: 270px; width: 480px;"/> </p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; white-space: normal; background-color: rgb(255, 255, 255); text-align: justify;"><span style="font-size: 12pt;"><span style="font-family: 宋體;">　　圖1-1 高壓斷路器導(dǎo)電回路測(cè)量原理圖</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; white-space: normal; background-color: rgb(255, 255, 255); text-align: justify;"><span style="font-size: 12pt;"><span style="font-family: 宋體;">　　S—電源控制開關(guān);Rf—分壓電阻;Rx—被測(cè)電阻;</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; white-space: normal; background-color: rgb(255, 255, 255); text-align: justify;"><span style="font-size: 12pt;"><span style="font-family: 宋體;">　　PA—直流電流表;PV—直流毫伏表</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; white-space: normal; background-color: rgb(255, 255, 255); text-align: justify;"><span style="font-size: 12pt;"><span style="font-family: 宋體;">　　由于導(dǎo)電回路接觸電阻很小，都是微微歐數(shù)量級(jí)，所以電壓表內(nèi)阻遠(yuǎn)遠(yuǎn)大于此值，故導(dǎo)電回路電阻值Rx=U/I。</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; white-space: normal; background-color: rgb(255, 255, 255); text-align: justify;"><span style="font-size: 12pt;"><span style="font-family: 宋體;">　　根據(jù)動(dòng)、靜頭的接觸面上有一層極薄的膜電阻的影響，如果直流電流太小，則所測(cè)電阻小于實(shí)際電阻值，不準(zhǔn)確。相關(guān)規(guī)程要求直流電流I≥100A，使接觸面上的極薄的膜電阻擊穿，所測(cè)電阻值與實(shí)際電阻值相符合。</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; white-space: normal; background-color: rgb(255, 255, 255); text-align: justify;"><span style="font-size: 12pt;"><span style="font-family: 宋體;"> </span></span></p><p style="text-align: center"><img style="max-width: 800px; max-height: 300%; width: 475px; height: 327px;" src="https://img49.chem17.com/9/20241113/638670810776363054176.png" title="add27238-d28f-4d7b-94f8-583b766ec9b0.png" alt="add27238-d28f-4d7b-94f8-583b766ec9b0.png" width="475" height="327"/></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; white-space: normal; background-color: rgb(255, 255, 255); text-align: justify;"><span style="font-size: 12pt;"><span style="font-family: 宋體;"></span></span><br/></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; white-space: normal; background-color: rgb(255, 255, 255); text-align: justify;"><span style="font-size: 12pt;"><span style="font-family: 宋體;">　　三、斷路器導(dǎo)電</span></span><span style="font-size: 12pt;"><span style="font-family: 宋體;">回路電阻測(cè)試儀</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; white-space: normal; background-color: rgb(255, 255, 255); text-align: justify;"><span style="font-size: 12pt;"><span style="font-family: 宋體;">　　以前高壓斷路器導(dǎo)電回路電阻測(cè)量采用直流伏安法，電流一般在10A，電源由蓄電池供給。顯然不符合《規(guī)程》要求的I≥100A。隨著電學(xué)技術(shù)的發(fā)展，目前斷路器導(dǎo)電回路電阻測(cè)量都采用專門的測(cè)試儀，如我公司研發(fā)生產(chǎn)的回路電阻測(cè)試儀。</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; white-space: normal; background-color: rgb(255, 255, 255); text-align: justify;"><span style="font-size: 12pt;"><span style="font-family: 宋體;">　　100A/200A回路電阻測(cè)試儀具有以下優(yōu)點(diǎn)：</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; white-space: normal; background-color: rgb(255, 255, 255); text-align: justify;"><span style="font-size: 12pt;"><span style="font-family: 宋體;">　　1、電流滿足要求，I≥100A，200A可選，所以測(cè)量值和實(shí)際值相符合。</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; white-space: normal; background-color: rgb(255, 255, 255); text-align: justify;"><span style="font-size: 12pt;"><span style="font-family: 宋體;">　　2、測(cè)試儀內(nèi)部附有標(biāo)準(zhǔn)電阻，測(cè)量精度較高。</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; white-space: normal; background-color: rgb(255, 255, 255); text-align: justify;"><span style="font-size: 12pt;"><span style="font-family: 宋體;">　　3、電流值能自動(dòng)恒流，有效減少主流電源波動(dòng)對(duì)試驗(yàn)結(jié)果的影響。</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; white-space: normal; background-color: rgb(255, 255, 255); text-align: justify;"><span style="font-size: 12pt;"><span style="font-family: 宋體;">　　4、采用四端子接線法，有效排除測(cè)試線電阻對(duì)試驗(yàn)結(jié)果的影響。</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; white-space: normal; background-color: rgb(255, 255, 255); text-align: justify;"><span style="font-size: 12pt;"><span style="font-family: 宋體;">　　5、測(cè)量電流自動(dòng)鎖定，不需要人工調(diào)節(jié)。</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; white-space: normal; background-color: rgb(255, 255, 255); text-align: justify;"><span style="font-size: 12pt;"><span style="font-family: 宋體;">　　6、配備高速熱敏打印機(jī)，打印試驗(yàn)結(jié)果，便于記錄。</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; white-space: normal; background-color: rgb(255, 255, 255); text-align: justify;"><span style="font-size: 12pt;"><span style="font-family: 宋體;">　　四、測(cè)量注意事項(xiàng)</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; white-space: normal; background-color: rgb(255, 255, 255); text-align: justify;"><span style="font-size: 12pt;"><span style="font-family: 宋體;">　　1、如果采用儀器測(cè)量，則按說明書進(jìn)行。如果采用伏安法測(cè)量，防止因斷路器測(cè)量過程中跳閘而燒壞毫儀表。</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; white-space: normal; background-color: rgb(255, 255, 255); text-align: justify;"><span style="font-size: 12pt;"><span style="font-family: 宋體;">　　2、測(cè)量前將斷路器電動(dòng)合閘后測(cè)量，只有允許手動(dòng)合閘的斷路器才可以在手動(dòng)合閘后進(jìn)行測(cè)量。</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; white-space: normal; background-color: rgb(255, 255, 255); text-align: justify;"><span style="font-size: 12pt;"><span style="font-family: 宋體;">　　3、在測(cè)前應(yīng)該將斷路器跳合幾次，以消除觸頭之間氧化膜影響。</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; white-space: normal; background-color: rgb(255, 255, 255); text-align: justify;"><span style="font-size: 12pt;"><span style="font-family: 宋體;">　　4、如果斷路器有主、輔觸頭或并聯(lián)支路，應(yīng)對(duì)并聯(lián)的每一對(duì)觸頭分別分別進(jìn)行測(cè)量。測(cè)量時(shí)應(yīng)在非被測(cè)的觸頭間墊以薄的絕緣物。</span></span></p><p><br/></p> <div id="ubjn47ipz" class="clear"></div> </div> <div id="ubjn47ipz" class="article"> <p>上一篇：<a href="/Article-3862043.html">斷路器絕緣電阻的測(cè)試及回路電阻測(cè)試</a></p> <p>下一篇：<a href="/Article-3855977.html">HTDZ-5A 直流電阻測(cè)試儀電流怎么選擇？</a></p> </div> <div id="ubjn47ipz" class="clear"></div> </div> </div> <div id="ubjn47ipz" class="n-9"> <div id="ubjn47ipz" class="c-right"> <div id="ubjn47ipz" class="c-1 r-pro"> <div id="ubjn47ipz" class="c-left"> <div id="ubjn47ipz" 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')" 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<ul> <li><a href="/SonList-1324457.html">> 液壓鉗（進(jìn)口）</a></li> <li><a href="/SonList-1324456.html">> 充電式液壓線纜剪</a></li> <li><a href="/SonList-1324455.html">> 充電式液壓電纜鉗</a></li> <li><a href="/SonList-1324454.html">> 剝線鉗</a></li> <li><a href="/SonList-1324453.html">> 線纜剪</a></li> <li><a href="/SonList-1324452.html">> 液壓導(dǎo)線鉗</a></li> <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="ubjn47ipz" 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="ubjn47ipz" 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 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