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id="app_52253022" role="draggable" data-type="app" data-appid="datumInfo" data-config="" data-state="true"> <div id="pr3mjyzo" class="appMask"></div> <div id="pr3mjyzo" class="appContent"> <div id="pr3mjyzo" class="datum_info"> <h1 class="title">說說回路電阻測試儀工作原理及標準</h1> <div id="pr3mjyzo" class="bgcolor_01"> <div id="pr3mjyzo" class="bgcolor_sum"> <div id="pr3mjyzo" class="left">日期：2024-11-18 18:30</div> <div id="pr3mjyzo" class="right">瀏覽次數(shù)：139</div> </div> <div id="pr3mjyzo" class="bgcolor_sum01"> 摘要：上?？档请姎饪萍加邢薰? 電力技術(shù) </div> </div> <div id="pr3mjyzo" class="content"> <p style="padding:0px;color:#333333;font-family:宋體, Tahoma, Arial;font-size:14px;background-color:#FFFFFF;"> <span style="font-family:宋體;letter-spacing:0px;">說說</span><span style="font-family:宋體;letter-spacing:0px;">回路電阻測試儀工作原理</span><span style="font-family:宋體;letter-spacing:0px;">及標準</span> </p> <p style="padding:0px;color:#333333;font-family:宋體, Tahoma, Arial;font-size:14px;background-color:#FFFFFF;"> <span style="font-family:宋體;letter-spacing:0px;"> </span> </p> <p style="padding:0px;color:#333333;font-family:宋體, Tahoma, Arial;font-size:14px;background-color:#FFFFFF;"> <span style="font-family:宋體;letter-spacing:0px;">回路電阻測試儀又被稱為<a href="http://m.seoer8.com/kangdengdq_Product_2035027259.html" class="keyword_inherit" name="keyword_inherit" target="_blank">開關(guān)回路電阻測試儀</a>，接觸回路電阻測試儀等，是用于開關(guān)控制設(shè)備的接觸電阻、回路電阻測量的儀器，被廣泛用于多個領(lǐng)域中。今天小編主要來介紹一下回路電阻測試儀工作原理，希望可以幫助用戶更好的應(yīng)用產(chǎn)品。</span> </p> <p style="padding:0px;color:#333333;font-family:宋體, Tahoma, Arial;font-size:14px;background-color:#FFFFFF;"> <span style="font-family:宋體;letter-spacing:0px;"> </span> </p> <p style="padding:0px;color:#333333;font-family:宋體, Tahoma, Arial;font-size:14px;background-color:#FFFFFF;"> <span style="font-family:宋體;letter-spacing:0px;">回路電阻測試儀工作原理</span> </p> <p style="padding:0px;color:#333333;font-family:宋體, Tahoma, Arial;font-size:14px;background-color:#FFFFFF;"> <span style="font-family:宋體;letter-spacing:0px;"> </span> </p> <p style="padding:0px;color:#333333;font-family:宋體, Tahoma, Arial;font-size:14px;background-color:#FFFFFF;"> <span style="font-family:宋體;letter-spacing:0px;">電力系統(tǒng)許多大電流電氣設(shè)備在預防性試驗和交接試驗中需要準確測量回路的電阻值。斷路器是電力系統(tǒng)重要的電氣設(shè)備，依照標準《JJG1052-2009回路電阻檢定規(guī)程》、國標GB763、GB50150和電力行業(yè)標準DL/T596對斷路器導電回路電阻的測量均作了規(guī)定：應(yīng)采用直流壓降法測量，電流不小于100A。</span> </p> <p style="padding:0px;color:#333333;font-family:宋體, Tahoma, Arial;font-size:14px;background-color:#FFFFFF;"> <span style="font-family:宋體;letter-spacing:0px;"> </span> </p> <p style="padding:0px;color:#333333;font-family:宋體, Tahoma, Arial;font-size:14px;background-color:#FFFFFF;"> <span style="font-family:宋體;letter-spacing:0px;">HLY-100A回路電阻測試儀是根據(jù)中華人民共和國電力執(zhí)行標準DL/T845.4-2004，采用高頻開關(guān)電源技術(shù)和數(shù)字電路技術(shù)相結(jié)合設(shè)計而成。它適用于開關(guān)控制設(shè)備回路電阻的測量。其測試電流采用國家標準推薦的直流100A?？稍陔娏?00A的情況下直接測得回路電阻，并用數(shù)字顯示出來。該儀器測量準確、性能穩(wěn)定，符合電力、供電部門現(xiàn)場高壓開關(guān)維修和高壓開關(guān)廠回路電阻測試的要求。</span> </p> <p style="padding:0px;color:#333333;font-family:宋體, Tahoma, Arial;font-size:14px;background-color:#FFFFFF;"> <span style="font-family:宋體;letter-spacing:0px;"> </span> </p> <p style="padding:0px;color:#333333;font-family:宋體, Tahoma, Arial;font-size:14px;background-color:#FFFFFF;"> <span style="font-family:宋體;letter-spacing:0px;">斷路器導電回路的電阻主要取決于斷路器的動、靜觸頭間的接觸電阻。接觸電阻的測量有許多種方法。日本學者Isao Minowa提出用超導量子器件測量接觸電阻，H.Archi提出利用電解槽法測量接觸電阻，波蘭學者 Jerzy Kaczarek提出用三次諧波法測量接觸電阻，這些方法一般是在實驗室條件下進行電接觸研究所采用的方法。工程中，通常采用四端子法來測量實際觸點的接觸電阻。</span> </p> <p style="padding:0px;color:#333333;font-family:宋體, Tahoma, Arial;font-size:14px;background-color:#FFFFFF;"> <span style="font-family:宋體;letter-spacing:0px;"> </span> </p> <p style="padding:0px;color:#333333;font-family:宋體, Tahoma, Arial;font-size:14px;background-color:#FFFFFF;"> <span style="font-family:宋體;letter-spacing:0px;">以前，通常采用直流雙臂電橋測量斷路器的接觸電阻。但是，當使用雙臂電橋進行斷路器導電回路電阻的測量時，由于雙臂電橋測量回路通過的是微弱的電流，難以消除電阻較大的氧化膜，測出的電阻示值偏大，但氧化膜在大的電流下很容易被擊穿，不妨礙正常電流通過。因此，測試采用直流壓降法測試時，電流不得太小。</span> </p> <p style="padding:0px;color:#333333;font-family:宋體, Tahoma, Arial;font-size:14px;background-color:#FFFFFF;"> <span style="font-family:宋體;letter-spacing:0px;"> </span> </p> <p style="padding:0px;color:#333333;font-family:宋體, Tahoma, Arial;font-size:14px;background-color:#FFFFFF;"> <span style="font-family:宋體;letter-spacing:0px;">高壓斷路器導電回路的電阻主要取決于斷路器的動、靜觸頭間的接觸電阻。接觸電阻的存在，增加了導體在通電時的損耗，使接觸處的溫度升高，其值的大小直接影響正常工作時的載流能力，在一定程度上影響短路電流的切斷能力。因此，斷路器每相導電回路電阻值是斷路器安裝、檢修、質(zhì)量驗收的一項重要數(shù)據(jù)。</span> </p> <p style="padding:0px;color:#333333;font-family:宋體, Tahoma, Arial;font-size:14px;background-color:#FFFFFF;"> <span style="font-family:宋體;letter-spacing:0px;"> </span> </p> <p style="padding:0px;color:#333333;font-family:宋體, Tahoma, Arial;font-size:14px;background-color:#FFFFFF;"> <span style="font-family:宋體;letter-spacing:0px;">由于開關(guān)觸頭之間存在氧化膜，如果用較小的電流檢測，由于氧化膜的影響測試結(jié)果一般偏大很多，但氧化膜在大電流下是能被擊穿的，理論上，測試電流只要不超過額定電流，應(yīng)該是越大越好，但規(guī)程在制定的時候考慮到當時國內(nèi)相關(guān)儀器的生產(chǎn)水平，作出了不得小于100A電流的規(guī)定。電力設(shè)備與地網(wǎng)導通電阻測試儀</span> </p> <p style="padding:0px;color:#333333;font-family:宋體, Tahoma, Arial;font-size:14px;background-color:#FFFFFF;"> <span style="font-family:宋體;letter-spacing:0px;"> </span> </p> <p style="padding:0px;color:#333333;font-family:宋體, Tahoma, Arial;font-size:14px;background-color:#FFFFFF;"> <span style="font-family:宋體;letter-spacing:0px;">電力設(shè)備的接地引下線與地網(wǎng)的可靠、有效連接是電力設(shè)備**運行及操作人員人身**的根本保證。雖然在制作接地裝置時，已對接地引下線連結(jié)處做了必要的防腐處理，但位于土壤中的連結(jié)點，仍會長期受到潮濕等因素的影響，出現(xiàn)接點腐蝕、開斷、松脫等現(xiàn)象，導致接地引下線與地網(wǎng)接觸點電阻值增大，不能達到電力規(guī)程的要求，使設(shè)備在運行中存在不**隱患，嚴重時造成設(shè)備脫開地網(wǎng)運行?？捎糜趯﹄娏υO(shè)備接地引下線與接地網(wǎng)或相鄰設(shè)備之間導通電阻值的測量。</span> </p> <p style="padding:0px;color:#333333;font-family:宋體, Tahoma, Arial;font-size:14px;background-color:#FFFFFF;"> <span style="font-family:宋體;letter-spacing:0px;"> </span> </p> <p style="padding:0px;color:#333333;font-family:宋體, Tahoma, Arial;font-size:14px;background-color:#FFFFFF;"> <span style="font-family:宋體;letter-spacing:0px;">地網(wǎng)導通電阻測試儀用于測量接地引下線導通電阻值，通過歷年測試值及相鄰點測試值比較來判定故障點。地網(wǎng)導通電阻測試儀工作電源由內(nèi)部鋰電池提供，無需外接交流電源，測試過程由單片機控制完成，具有操作簡單、測試速度快、測試數(shù)據(jù)穩(wěn)定、便于攜帶等特點。</span> </p> <p style="padding:0px;color:#333333;font-family:宋體, Tahoma, Arial;font-size:14px;background-color:#FFFFFF;"> <span style="font-family:宋體;letter-spacing:0px;"> </span> </p> <p style="padding:0px;color:#333333;font-family:宋體, Tahoma, Arial;font-size:14px;background-color:#FFFFFF;"> <span style="font-family:宋體;letter-spacing:0px;">由于斷路器接觸電阻很小，只有用很高的電流檢測，才能保證一定的精度，抗干擾能力也越強。</span> </p> <p style="padding:0px;color:#333333;font-family:宋體, Tahoma, Arial;font-size:14px;background-color:#FFFFFF;"> <span style="font-family:宋體;letter-spacing:0px;"> </span> </p> <p style="padding:0px;color:#333333;font-family:宋體, Tahoma, Arial;font-size:14px;background-color:#FFFFFF;"> <span style="font-family:宋體;letter-spacing:0px;">用于斷路器接觸電阻和載流導體電阻的高精度測量，能長時間、穩(wěn)定輸出大電流，符合DL\T845.4-2004《電阻測量裝置通用技術(shù)條件第四部份:回路電阻測試儀》的相關(guān)規(guī)定。</span> </p> </div> <div id="pr3mjyzo" class="datumrelate"> <span>下一篇：</span> <a href="/kangdengdq_Article_11699862.html" title="開關(guān)回路電阻測試儀的運輸貯存事項">開關(guān)回路電阻測試儀的運輸貯存事項</a> <br> <span>上一篇：</span> <a href="/kangdengdq_Article_11700786.html" title="回路電阻測試儀常見故障及解決辦法">回路電阻測試儀常見故障及解決辦法</a> </div> </div> </div> </div> </div> </div> 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