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href="http://www.cdcfah.com/cp/third-dgyqybwr_cscsyqez/">參數(shù)測試儀器</a>?江西變壓器檢測儀器貼心服務(wù) 展榮新精密電子供應(yīng)</p><div id="iyokmea" class="leftbox clearfix"><h1>江西變壓器檢測儀器貼心服務(wù) 展榮新精密電子供應(yīng)</h1><div id="ga0008u" class="proBig"><div id="uge22mg" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/ZRX888/637284368292333984/8679976.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="wgu8usy" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/ZRX888/637284368292333984/8679976.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="ymsgu0m" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價格要求：</span>面議</p><p><span>所在地：</span>廣東省</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>江西變壓器檢測儀器,變壓器</p><p><span>***更新：</span>2021-02-05 05:20:21</p><p><span id="click" >瀏覽次數(shù)：4次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="cao8io0" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">深圳市展榮新精密電子有限公司</a></p><p><span>聯(lián)系人：</span>喻孟峨</p><p><span>郵箱: </span>113527410@qq.com</p><p><span>電話: </span>15012892536</p><p><span>傳真: </span>0755_</p><p><span>網(wǎng)址: </span></p><p><span>手機: </span>0755-27923475</p><p><span>地址: </span>航城街道黃田社區(qū)崗貝工業(yè)區(qū)綜合樓10棟401</p><p>[當(dāng)前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="8ougiye" class="page-proshow02"><p class="title">詳細說明</p><div id="ou0mwuy" class="box"><p><p style="text-indent:25px">空載試驗：從變壓器的某一繞組（一般從二次低壓側(cè)）施加正弦波額定頻率的額定電壓，其余繞組開路，測量空載電流和空載損耗。如果試驗條件有限，電源電壓達不到額定電壓，可在非額定電壓條件下試驗，江西變壓器檢測儀器，這種試驗方法誤差較大，江西變壓器檢測儀器，一般只用于檢查變壓器有無故障，只有試驗電壓達到額定電壓的80%以上才可用來測試空載損耗。短路試驗：將變壓器低壓大電流側(cè)人工短聯(lián)接，從電壓高的一側(cè)線圈的額定分接頭處通入額定頻率的試驗電壓，使繞組中電流達到額定值，江西變壓器檢測儀器，然后測量輸入功率和施加的電壓（即短路損耗和短路電壓）以及電流值。通常試驗電源的容量應(yīng)為被試品容量的30％。準(zhǔn)確獲得變比，判斷變壓器是否可以并聯(lián)運行。江西變壓器檢測儀器</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="江西變壓器檢測儀器,變壓器" src="https://tyunfile.71360.com/UploadFile/ZRX888/637284368292333984/8679976.png"></div><p style="text-indent:25px">鑒于環(huán)氧樹脂澆注干式配電變壓器還存在下列一些問題：(1)設(shè)計的自由度不大，每個繞組都要用模具才能撓注。(2)一旦在高溫中燃燒會產(chǎn)生大量煙霧。(3)由于環(huán)氧樹脂與導(dǎo)線的熱膨脹系數(shù)不盡相同，如果緩沖層設(shè)置不當(dāng)，易在冷熱溫度沖擊下，澆注層開裂，局部放電量增加，部分企業(yè)的個別產(chǎn)品已有此類質(zhì)量問題在運行中暴露。(4)環(huán)保問題，一旦這種環(huán)氧樹脂澆注型干式配電變壓器預(yù)期壽命已到，或因各種故障而使變壓器繞組損壞，要銷毀澆注成型的繞組是困難的，尚無法使環(huán)氧樹脂降解。從環(huán)保角度上講，這將是日益嚴重的問題。(5)環(huán)氧樹脂澆注型干式配電變壓器多數(shù)屬于F級耐溫等級，個別企業(yè)能生產(chǎn)H級耐溫等級的澆注型干式配電變壓器。鑒于上述原因，已有部分企業(yè)在發(fā)展敞開通風(fēng)干式H級配電變壓器。江門變壓器的耐壓試驗測量變壓器低壓側(cè)時，所有人員應(yīng)與高壓側(cè)保持適當(dāng)安全距離。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="江西變壓器檢測儀器,變壓器" src="https://tyunfile.71360.com/UploadFile/ZRX888/637284368098925781/9464422.png"></div><p> 1、變壓器定義、作用 </p> <p> 變壓器是一種相對靜止的電氣設(shè)備，由繞在同一個鐵心上的兩個或兩個以上的繞組組成的，繞組之間通過交變的磁通的相互聯(lián)系。為了把發(fā)電廠發(fā)出的電能經(jīng)濟的傳輸、合理的分配以及安全的使用，都要用到電力變壓器。 </p> <p> 2、變壓器工作原理 </p> <p> 簡單說變壓器的工作原理就是“電生磁，磁生電”。變壓器的初級（一次）線圈和次級（二次）線圈共同繞在一個鐵芯上，當(dāng)一次線圈通入電壓U1后，在鐵芯中產(chǎn)生交變磁通，這個磁通穿過一次繞組和二次繞組，根據(jù)電磁感應(yīng)定律，在一次繞組和二次繞組中分別產(chǎn)生感應(yīng)電勢E1和E2。根據(jù)電磁感應(yīng)定律可知，一次側(cè)、二次側(cè)繞組的感應(yīng)電勢分別為：E1/E2=U1/U2=N1/N2=K(k為變比) </p> <p> <br /> </p><p style="text-indent:25px">測定電動機三相繞組頭尾的兩種方法：在電動機6根引出線標(biāo)記無法確認時，我們可利用交流電源和燈泡檢查電動機三相繞組的頭尾端，以免將繞組接錯。用交流電源和燈泡確定電動機三相繞組的方法是：首先用36V低壓燈做試燈，分出電動機每一相線圈的兩個線端，然后將兩相線圈串接后通入220V電源，剩下的一相線圈兩端接36V的燈泡線路通入電源后，燈泡發(fā)亮，說明所串聯(lián)的兩相是頭尾相接；燈泡不亮，說明是頭頭相接，如圖26(a)所示。然后將測出的兩相線圈頭尾做一標(biāo)記，再按此方法將其中一相與原來接燈泡的一相線圈串聯(lián)，另一相連接燈泡，再按同樣道理判斷，電動機三相繞組的頭尾就很容易區(qū)分出來了。另一種方法是用萬用表測定電動機三相繞組頭尾，首先用萬用表測量出電動機6個接線端哪兩個線端為同一相，然后將萬用表的直流毫安擋撥到較小一擋，并將表筆接到三相繞組的某一組兩端，而電池正負極接到另一相的兩個線端上。在變壓器的日常檢查中還要著重關(guān)注吸濕器的檢查。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="江西變壓器檢測儀器,變壓器" src="https://tyunfile.71360.com/UploadFile/ZRX888/637284368500371094/6122012.png"></div><p> LearnEngineering制作的動畫，視頻中我們可以很直觀的學(xué)習(xí)變壓器的工作原理，變壓器是利用電磁感應(yīng)的原理來改變交流電壓的裝置，主要構(gòu)件是初級線圈、次級線圈和鐵芯（磁芯）。主要功能有：電壓變換、電流變換、阻抗變換、隔離、穩(wěn)壓（磁飽和變壓器）等。變壓器由鐵芯（或磁芯）和線圈組成，線圈有兩個或兩個以上的繞組，其中接電源的繞組叫初級線圈，其余的繞組叫次級線圈。首先選擇變壓器的額定電壓。高壓側(cè)電壓與所接入電網(wǎng)電壓相等，低壓側(cè)電壓比低壓側(cè)電網(wǎng)的電壓高10%或5%（取決變壓器電壓等級和阻抗電壓大小）；額定容量選擇。計算變壓器所帶負荷的大?。ㄒ蠼y(tǒng)計比較大綜合負荷，將有功負荷kW值換算成視在功率kVA），如果是兩臺變壓器，那么每臺變壓器的容量可按照比較大綜合負荷的70%選擇，一臺變壓器要按總負荷考慮，并留有適當(dāng)?shù)脑６?。其它明星參?shù)可結(jié)合變壓器產(chǎn)品適當(dāng)考慮。例如：選擇35/10kV變壓器。假定比較大負荷為3500kW，功率因數(shù)為，選兩臺變壓器，容量S=×3500/，可選擇3150kVA的變壓器，電壓比為35kV/。再從產(chǎn)品目錄中選擇型號。檢查變比是否與銘牌相符，以保證對電壓的正確變換。江門變壓器耐壓測試</p><p style="text-indent:25px">變壓器耐壓試驗控制臺是由接觸式調(diào)壓器及其控制、保護、測量、信號電路組成。江西變壓器檢測儀器</p><p style="text-indent:25px">現(xiàn)場操作要點：1.測試時必須正確記錄分接開關(guān)的位置。應(yīng)盡可能將被測試變壓器的分接開關(guān)放置在第1分接，特別對有載調(diào)壓變壓器，以獲取較較全的繞組信息。對無載調(diào)壓變壓器，應(yīng)保證每次測量在同一. 分接位置，便于比較。2.繞組變形測試應(yīng)在解開變壓器所有引線的前提下進行，并使這些引線盡可能地遠離變壓器套管(周圍接地體和金屬懸浮物需離開變壓器套管20cm以上)，尤其是與封閉母線連接的變壓器。3.測試儀的接地沒有連接正確前，不要開始繞組變形測試。4.繞組變形測試應(yīng)放在直流類試驗之前或交流類試驗之后。5.試驗中如變壓器三相頻響特性不一致，應(yīng)檢查設(shè)備后測試，直至同一相兩次試驗結(jié)果-致。江西變壓器檢測儀器</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/3168329.html</p></div></div></div></div></div><div id="ouamsw8" class="page-right twoColRt"><div id="yk8ea2c" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="agc8gm8" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img src="http://tyunfile.71360.com/UpLoadFile/2019/11/1/14/637082168864691056_lgpj_5374157.jpg" alt="福建ZF配件哪家強信息推薦自業(yè)物資供應(yīng)" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></div><p>福建ZF配件哪家強信息推薦自業(yè)物資供應(yīng)</p></a></div><div id="swawkqg" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/846569.html"><div><img 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