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</span>電力變壓器<span style="color: rgb(24, 24, 24); font-family: 微軟雅黑, Arial, 宋體; font-size: 15px;">線圈的一次側(cè)和二次側(cè)之間存在著極性關(guān)系，若有幾個線圈或幾個變壓器進行組合，都需要知道其極性，才可以正確運用。對于兩線圈的變壓器來說，若在任意瞬間在其內(nèi)感應(yīng)的電勢都具有同方向，則稱它為同極性或減極性，否則為加極性。變壓器聯(lián)結(jié)組是變壓器的重要參數(shù)之一，是變壓器并聯(lián)運行的重要條件，在很多情況下都需要進行測量。</span><br style="color: rgb(24, 24, 24); font-family: 微軟雅黑, Arial, 宋體; font-size: 15px;"/><span style="color: rgb(24, 24, 24); font-family: 微軟雅黑, Arial, 宋體; font-size: 15px;">　　一、</span>變壓器<span style="color: rgb(24, 24, 24); font-family: 微軟雅黑, Arial, 宋體; font-size: 15px;">極性組別和電壓比試驗的目的和意義</span><br style="color: rgb(24, 24, 24); font-family: 微軟雅黑, Arial, 宋體; font-size: 15px;"/><span style="color: rgb(24, 24, 24); font-family: 微軟雅黑, Arial, 宋體; font-size: 15px;">　　在變壓器空載運行的條件下，高壓繞組的電壓和低壓繞組的電壓之比稱為變壓器的變壓比：</span><br style="color: rgb(24, 24, 24); font-family: 微軟雅黑, Arial, 宋體; font-size: 15px;"/><span style="color: rgb(24, 24, 24); font-family: 微軟雅黑, Arial, 宋體; font-size: 15px;">　　電壓比一般按線電壓計算，它是變壓器的一個重要的性能指標，測量變壓器變比的目的是：</span><br style="color: rgb(24, 24, 24); font-family: 微軟雅黑, Arial, 宋體; font-size: 15px;"/><span style="color: rgb(24, 24, 24); font-family: 微軟雅黑, Arial, 宋體; font-size: 15px;">　　(1)保證繞組各個分接的電壓比在技術(shù)允許的范圍之內(nèi)；</span><br style="color: rgb(24, 24, 24); font-family: 微軟雅黑, Arial, 宋體; font-size: 15px;"/><span style="color: rgb(24, 24, 24); font-family: 微軟雅黑, Arial, 宋體; font-size: 15px;">　　(2)檢查繞組匝數(shù)的正確性；</span><br style="color: rgb(24, 24, 24); font-family: 微軟雅黑, Arial, 宋體; font-size: 15px;"/><span style="color: rgb(24, 24, 24); font-family: 微軟雅黑, Arial, 宋體; font-size: 15px;">　　(3)判定繞組各分接的引線和分接開關(guān)連接是否正確。</span><br style="color: rgb(24, 24, 24); font-family: 微軟雅黑, Arial, 宋體; font-size: 15px;"/><span style="color: rgb(24, 24, 24); font-family: 微軟雅黑, Arial, 宋體; font-size: 15px;">　　二、</span>變壓器<span style="color: rgb(24, 24, 24); font-family: 微軟雅黑, Arial, 宋體; font-size: 15px;">極性組別和電壓比試驗方法</span><br style="color: rgb(24, 24, 24); font-family: 微軟雅黑, Arial, 宋體; font-size: 15px;"/><span style="color: rgb(24, 24, 24); font-family: 微軟雅黑, Arial, 宋體; font-size: 15px;">　　1、直流法確定變壓器的極性</span><br style="color: rgb(24, 24, 24); font-family: 微軟雅黑, Arial, 宋體; font-size: 15px;"/><span style="color: rgb(24, 24, 24); font-family: 微軟雅黑, Arial, 宋體; font-size: 15px;">　　測量變壓器繞組極性的方法有直流法和交流法。</span><br style="color: rgb(24, 24, 24); font-family: 微軟雅黑, Arial, 宋體; font-size: 15px;"/><span style="color: rgb(24, 24, 24); font-family: 微軟雅黑, Arial, 宋體; font-size: 15px;">　　直流法：用一節(jié)干電池接在變壓器的高壓端子上，在變壓器的二次側(cè)接上一毫安表或微安表，實驗時觀察當電池開關(guān)合上時表針的擺動方向，即可確定極性。</span><br style="color: rgb(24, 24, 24); font-family: 微軟雅黑, Arial, 宋體; font-size: 15px;"/><span style="color: rgb(24, 24, 24); font-family: 微軟雅黑, Arial, 宋體; font-size: 15px;">　　2、直流法確定變壓器的組別；</span><br style="color: rgb(24, 24, 24); font-family: 微軟雅黑, Arial, 宋體; font-size: 15px;"/><span style="color: rgb(24, 24, 24); font-family: 微軟雅黑, Arial, 宋體; font-size: 15px;">　　3、用</span>HTBC-H變壓器變比測試儀<span style="color: rgb(24, 24, 24); font-family: 微軟雅黑, Arial, 宋體; font-size: 15px;">測量變壓比。</span><br style="color: rgb(24, 24, 24); font-family: 微軟雅黑, Arial, 宋體; font-size: 15px;"/><span style="color: rgb(24, 24, 24); font-family: 微軟雅黑, Arial, 宋體; font-size: 15px;">　　三、注意事項和結(jié)果分析</span><br style="color: rgb(24, 24, 24); font-family: 微軟雅黑, Arial, 宋體; font-size: 15px;"/><span style="color: rgb(24, 24, 24); font-family: 微軟雅黑, Arial, 宋體; font-size: 15px;">　　(1) 直流法確定極性時，試驗過程應(yīng)反復(fù)操作數(shù)次，以免發(fā)生因表針擺動快而作出錯誤的結(jié)論。</span><br style="color: rgb(24, 24, 24); font-family: 微軟雅黑, Arial, 宋體; font-size: 15px;"/><span style="color: rgb(24, 24, 24); font-family: 微軟雅黑, Arial, 宋體; font-size: 15px;">　　(2) 在測量組別時，對于變壓比大的變壓器應(yīng)選擇較高的電壓和小量程的直流毫伏表，微安表或萬用表；對變壓比小的選用較低的電壓和較大量程的毫伏表，微安表或萬用表。</span><br style="color: rgb(24, 24, 24); font-family: 微軟雅黑, Arial, 宋體; font-size: 15px;"/><span style="color: rgb(24, 24, 24); font-family: 微軟雅黑, Arial, 宋體; font-size: 15px;">　　(3) 變壓器的變壓比應(yīng)該在每一個分接下進行測量，當不只一個線圈帶有分接時，可以輪流在各個線圈所有分接位置下測定，而其相對的帶分接線圈則應(yīng)接在額定分接上。</span><br style="color: rgb(24, 24, 24); font-family: 微軟雅黑, Arial, 宋體; font-size: 15px;"/><span style="color: rgb(24, 24, 24); font-family: 微軟雅黑, Arial, 宋體; font-size: 15px;">　　(4) 帶有載調(diào)壓裝置的，必須采用電動操動裝置變換分接。</span><br style="color: rgb(24, 24, 24); font-family: 微軟雅黑, Arial, 宋體; font-size: 15px;"/><span style="color: rgb(24, 24, 24); font-family: 微軟雅黑, Arial, 宋體; font-size: 15px;">　　(5) 整個測量過程要特別注意變壓器A和a不能對調(diào)，否則高壓將會進入橋體。</span><br style="color: rgb(24, 24, 24); font-family: 微軟雅黑, Arial, 宋體; font-size: 15px;"/><span style="color: rgb(24, 24, 24); font-family: 微軟雅黑, Arial, 宋體; font-size: 15px;">　　(6) 當逐漸增加試驗電壓時，電壓表迅速上升至滿度時應(yīng)關(guān)掉電源進行檢查。</span><br style="color: rgb(24, 24, 24); font-family: 微軟雅黑, Arial, 宋體; font-size: 15px;"/><span style="color: rgb(24, 24, 24); font-family: 微軟雅黑, Arial, 宋體; font-size: 15px;">　　(7) 對所測得的結(jié)果，各相應(yīng)分接的電壓比順序應(yīng)與銘牌相同；額定分接電壓比允許偏差為，其他分接的偏差應(yīng)在變壓器阻抗值的以內(nèi)，但不能超過。</span><span style="font-size: 16px;"><strong><br/></strong></span></p> <div id="iqaqewgi6e" class="clear"></div> </div> <div id="iqaqewgi6e" class="article"> <p>上一篇：<a href="/Article-3227688.html">高絕緣電阻測試儀防靜電地坪測試儀性能</a></p> <p>下一篇：<a href="/Article-3226796.html">GD-10KV高壓交流驗電器技術(shù)參數(shù)與使用</a></p> </div> <div id="iqaqewgi6e" class="clear"></div> </div> </div> <div id="iqaqewgi6e" class="n-9"> <div id="iqaqewgi6e" class="c-right"> <div id="iqaqewgi6e" class="c-1 r-pro"> <div id="iqaqewgi6e" class="c-left"> <div id="iqaqewgi6e" 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')" class="yj">大電流發(fā)生器</a> <div class="iqaqewgi6e" id="submenu_大電流發(fā)生器" style="display:none"> <ul> </ul> </div> </li> <li><a href="/ParentList-1384344.html" onmouseover="showsubmenu('LCR數(shù)字電橋')" class="yj">LCR數(shù)字電橋</a> 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測試夾</a></li> <li><a href="/SonList-1354481.html">> 高壓硅膠絕緣試驗電纜</a></li> <li><a href="/SonList-1354480.html">> 接線柱</a></li> <li><a href="/SonList-1354479.html">> 測試電力導(dǎo)線包</a></li> </ul> </div> </li> <li><a href="/ParentList-1332628.html" onmouseover="showsubmenu('電器電阻測試儀')" class="yj">電器電阻測試儀</a> <div class="iqaqewgi6e" id="submenu_電器電阻測試儀" style="display:none"> <ul> <li><a href="/SonList-1332641.html">> 新品推薦</a></li> <li><a href="/SonList-1332639.html">> 元器件參數(shù)測試儀器</a></li> <li><a href="/SonList-1332638.html">> 電氣安規(guī)測試儀器</a></li> <li><a href="/SonList-1332637.html">> 變壓器、電機、線圈類測試儀器</a></li> <li><a href="/SonList-1332636.html">> 電聲器件測試儀器</a></li> <li><a href="/SonList-1332635.html">> 直流電阻、介質(zhì)絕緣電阻測試儀器</a></li> <li><a href="/SonList-1332634.html">> 信號失真度測試儀器</a></li> <li><a href="/SonList-1332633.html">> 其它測試儀器</a></li> <li><a href="/SonList-1332632.html">> 儀器備附件</a></li> </ul> </div> </li> <li><a href="/ParentList-1323444.html" onmouseover="showsubmenu('彎管機、試壓泵總匯')" 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