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href="http://www.cdcfah.com/cp/third-gkxtjzbyb_baohuqijq/">保護器</a>?濟寧弧光保護分類歡迎咨詢江蘇基頓電氣供應</p><div id="qeg7hhp" class="leftbox clearfix"><h1>濟寧弧光保護分類歡迎咨詢江蘇基頓電氣供應</h1><div id="peblnzw" class="proBig"><div id="nc7suw7" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/keaton/637255090210458984/175496.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="uyvcev8" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/keaton/637255090210458984/175496.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="v8tdkcb" 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>江蘇省</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關鍵詞：</span>濟寧弧光保護分類</p><p><span>***更新：</span>2020-06-22 19:27:22</p><p><span id="click" >瀏覽次數(shù)：0次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="mb87als" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">江蘇基頓電氣自動化有限公司</a></p><p><span>聯(lián)系人：</span>高經(jīng)理</p><p><span>郵箱: </span>215741001@qq.com</p><p><span>電話: </span>13328157222</p><p><span>傳真: </span>0510_</p><p><span>網(wǎng)址: </span></p><p><span>手機: </span>0510-85027009</p><p><span>地址: </span>長安鎮(zhèn)友誼路28號</p><p>[當前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="kumolnu" class="page-proshow02"><p class="title">詳細說明</p><div id="crt8cu8" class="box"><p><p> 1.1 電弧光產(chǎn)生的原因 </p> <p> 引起開關柜弧光短路故障的原因很多，主要有：絕緣故障、載流回路不良、外來物體的進入，濟寧弧光保護分類、人為操作錯誤、系統(tǒng)改變或故障等，濟寧弧光保護分類。 </p> <p> 1.2 電弧光的能量 </p> <p> 開關柜發(fā)生內(nèi)部弧光故障產(chǎn)生的短路功率可高達8~60 MW，所產(chǎn)生的能量與電弧的燃燒時間、短路電流的平方值，濟寧弧光保護分類、柜體幾何尺寸以及所使用的材料等因素有關，其中**主要的因素是短路故障電流及電弧燃燒的時間，電弧能量與有關電弧燃燒的時間的關系如圖所示。從圖中可以看出，電弧燃燒持續(xù)時間超過100 ms ，所釋放的能量開始急劇增加，接著各種故障效應對開關設備的電纜、銅排以及鋼材造成嚴重損壞. </p> <p> <br /> </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="濟寧弧光保護分類" src="https://tyunfile.71360.com/UploadFile/keaton/637255090210458984/175496.jpg"></div><p> 電弧光保護目的是在發(fā)生電弧故障時，通過限制電弧燃燒時間來保護附近工作人員及設備。電弧保護首先必須檢測故障電弧，然后才能切斷流過的故障電流。在中低開關柜內(nèi)部故障保護中，一般是通過跳開斷路器來切除故障使故障電弧熄滅。電弧燃燒時伴隨著光、聲及電磁波形式的輻射。通過分析可見光、聲波、紅外線或無線電頻率的輻射可以檢測到電弧的存在，甚至連由電弧產(chǎn)生的壓力波也已經(jīng)用來檢測它的存在。然而，*****使用的方法還是通過檢測可見光來實現(xiàn)。 </p> <p> 電弧光保護系統(tǒng)通過檢測開關柜內(nèi)部發(fā)生故障時發(fā)出的電弧光判斷是否發(fā)生故障?；」馐请娀?*明顯且變化**快的特征物理量，因而電弧光保護具有超高速的動作性能，整套保護的動作時間可保證在幾毫秒以內(nèi)。對于開關柜內(nèi)部故障保護來講，這種超調(diào)整動作性能是**重要的。為了避免外界光干擾可能引發(fā)系統(tǒng)的誤跳閘，在實際應用中往往還引入過流閉鎖信號，即：只有同時檢測到弧光信號及過流動作信號才發(fā)出跳閘指令切除故障，從而進一步提高保護系統(tǒng)動作的可靠性。 </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="濟寧弧光保護分類" src="https://tyunfile.71360.com/UploadFile/keaton/637255090210488281/9985773.jpg"></div><p> 系統(tǒng)優(yōu)點 </p> <p> (1)動作迅速可靠 </p> <p> 跳閘回路采用了快速繼電器技術，確保保護系統(tǒng)在1ms內(nèi)發(fā)出跳閘信號，加上斷路器動作時間(35-60ms)，使開關柜內(nèi)部電弧光故障總切除時間控制在60ms以內(nèi)，而且在外觀上無明顯損壞。繼電保護裝置包括測量、計算、自檢、動作等時間累計約44ms, 加上斷路器動作時間，差動保護和無時限電流速斷保護動作，故障切除時間約100ms。即使電流速斷保護比弧光保護多40ms,查看弧光危害示意圖，電纜已經(jīng)燃燒。如果是帶時限電流速斷保護延時100ms、過電流Ⅰ段延時300ms,已經(jīng)達到柜體燃燒甚至的可能。 </p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/353995.html</p></div></div></div></div></div><div id="3j2s8l3" class="page-right twoColRt"><div id="t7daxjl" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="crog3hb" 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" 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</p></a></div><div id="xhzgfqn" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/846569.html"><div><img 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