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當前位置:<a href="http://www.cdcfah.com/">首頁?<a href="http://www.cdcfah.com/cp/">產(chǎn)品供應(yīng)</a>?<a href="http://www.cdcfah.com/cp/first-_dgdq/">電工電氣</a>?<a href="http://www.cdcfah.com/cp/second-dgdq_gkxtjzbyb/">工控系統(tǒng)及裝備</a>?<a href="http://www.cdcfah.com/cp/third-gkxtjzbyb_plcod/">PLC</a>?上海二工電流互感器貨期快歡迎來電上海喆和機電科技供應(yīng)</p><div id="8b3fr87" class="leftbox clearfix"><h1>上海二工電流互感器貨期快歡迎來電上海喆和機電科技供應(yīng)</h1><div id="tg4u7q7" class="proBig"><div id="acr8f3i" class="bigimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UpLoadFile/shcmzdh/2020/2/637167087926902204/6371670879269022048294637.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="mga9dmi" class="smallimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UpLoadFile/shcmzdh/2020/2/637167087926902204/6371670879269022048294637.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="szlpl3l" 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>上海市</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>上海二工電流互感器貨期快,電流互感器</p><p><span>***更新：</span>2020-08-21 17:24:23</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="hqnb7qe" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">上海喆和機電科技有限公司</a></p><p><span>聯(lián)系人：</span>李小雅</p><p><span>郵箱: </span>shzh-sh@qq.com</p><p><span>電話: </span>13761188658</p><p><span>傳真: </span>021_53862782</p><p><span>網(wǎng)址: </span></p><p><span>手機: </span>021-53862782</p><p><span>地址: </span>上海市靜安區(qū)恒豐北路100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="3eyulhd" class="page-proshow02"><p class="title">詳細說明</p><div id="8t8isoq" class="box"><p><p> 上海喆和定制銷售西門子電流互感器ALH-0.66系列。 </p> <p> 電流互感器1次側(cè)只有1到幾匝，導(dǎo)線截面積大，串入被測電路。2次側(cè)匝數(shù)多，導(dǎo)線細，與阻抗較小的儀表(電流表/功率表的電流線圈）構(gòu)成閉路。電流互感器的運行情況相當于2次側(cè)短路的變壓器，忽略勵磁電流，安匝數(shù)相等I1N1=I2N2電流互感器一次繞組電流I1與二次繞組I2的電流比，叫實際電流比I1/I2=N2/N1=k。勵磁電流是誤差的主要根源。測量用電流互感器的精度等級0.2/0.5/1/3,1表示變比誤差不超過±1%，另外還有0.2S和0.5S級。2、保護用電流互感器保護用電流互感器分為：1，上海二工電流互感器貨期快.過負荷保護電流互感器，2.差動保護電流互感器，3，上海二工電流互感器貨期快.接地保護電流互感器（零序電流互感器）保護用電流互感器主要與繼電裝置配合，在線路發(fā)生短路過載等故障時，向繼電裝置提供信號切斷故障電路，以保護供電系統(tǒng)的安全。保護用電流互感器的工作條件與測量用電流保護用電流互感器互感器完全不同，保護用互感器只是在比正常電流大幾倍幾十倍的電流時才開始有效的工作。保護用互感器主要要求：1.絕緣可靠，2，上海二工電流互感器貨期快.足夠大的準確限值系數(shù)，3.足夠的熱穩(wěn)定性和動穩(wěn)定性。上海喆和定制銷售西門子APT（原上海二工）ALH-0.66 20III電流互感器.上海二工電流互感器貨期快</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="上海二工電流互感器貨期快,電流互感器" src="http://tyunfile.71360.com/UpLoadFile/shcmzdh/2020/2/637167087926902204/6371670879269022048294637.png"></div><p> 上海喆和定制西門子電流互感器 ALH-0.66系列。 </p> <p> 準確級選擇的原則：計費計量用的電流互感器其準確級不低于0．5級；用于監(jiān)視各進出線回路中負荷電流大小的電流表應(yīng)選用1．0—3．0級電流互感器。為了保證準確度誤差不超過規(guī)定值，一般還校驗電流互感器二次負荷（伏安），互感器二次負荷S2不大于額定負荷S2n，所選準確度才能得到保證。準確度校驗公式：S2≤S2n。二次回路的負荷l：取決于二次回路的阻抗Z2的值，則：S2=I2n2︱Z2︱≈I2n2（∑︱Zi︱+ RWl+RXC）或S2V1≈∑Si+I2n2（RWl+RXC）式中，Si、Zi為二次回路中的儀表、繼電器線圈的額定負荷和阻抗，RXC為二次回路中所有接頭、觸點的接觸電阻，一般取0．1Ω，RWL為二次回路導(dǎo)線電阻，計算公式化為：RWL=LC/（r×S）。式中，r為導(dǎo)線的導(dǎo)電率，銅線r=53m/（Ωmm2），鋁線r=32m（Ωmm2），S為導(dǎo)線截面積（mm2），LC為導(dǎo)線的計算長度（m）。設(shè)互感器到儀表單向長度為L1，則：L1互感器為星形接LC=L1兩相V形接線2L1一相式接線繼電保護用的電流互感器的準確度常用的有5P和l0P。保護級的準確度是以額定準確限值一次電流下的電流互感器額定復(fù)合誤差ε%來標稱的（如5P對應(yīng)的ε%=5%）。上?，F(xiàn)貨銷售電流互感器報價上海喆和定制銷售西門子APT（原上海二工）ALH-0.66 170*100II電流互感器.</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="上海二工電流互感器貨期快,電流互感器" src="http://tyunfile.71360.com/UpLoadFile/shcmzdh/2020/2/637167087581865934/6371670875818659347638789.jpg"></div><p style="text-indent:25px"> 上海喆和銷售西門子電流互感器。100多年來的傳統(tǒng)結(jié)論與科技進步、材料更新、結(jié)構(gòu)變化、工藝革新的現(xiàn)代新型電流互感器的實際二次開路電壓相比存在著巨大差別，所以傳統(tǒng)結(jié)論應(yīng)當修正。二、電流互盛器二次開路時發(fā)熱情況分析對母線穿心式電流互感器，根據(jù)焦耳—楞次定律Q=I2Rt，二次開路時由I2=0，Q2=0，所以二次線圈不會發(fā)熱。但是，當二次線圈由閉路轉(zhuǎn)為開路時，母線上功耗增大。對母線穿心式150／5的電流互感器一次電流為額定值時，經(jīng)過計算其功耗增量**小為9W，額定為17W。由于母線粗長，散熱忍受力好，不會發(fā)熱。所有母線穿心式電流互感器在變流實驗臺上斷續(xù)運行長達2年半之久，從未發(fā)現(xiàn)燒壞一例，充分體現(xiàn)了目前實用新型電流互感器發(fā)熱特性與傳統(tǒng)結(jié)論截然不同。已被平度淘汰的LQG系列電流互感器在交流實驗臺上進行證明，當一次線圈電流為額定值時，二次線圈開路，保持一次電流仍為額定電流，雖然二次線圈不會發(fā)熱，但一次線圈功耗量增大。例如44號30／5的電流互感器，其一次壓降增量為2．5V，功耗增大75W，一次線圈略微發(fā)熱。</p><p> 上海喆和定制銷售西門子電流互感器互感器的誤差包括比差和角差兩部分。比值誤差簡稱比差，一般用符號f表示，它等于實際的二次電流與折算到二次側(cè)的一次電流的差值，與折算到二次側(cè)的一次電流的比值，以百分數(shù)表示。角差：相角誤差簡稱角差，一般用符號δ表示，它是旋轉(zhuǎn)180°后的二次電流向量與一次電流向量之間的相位差。規(guī)定二次電流向量超前于一次電流向量δ為正值，反之為負值，用分（’）為計算單位。熱穩(wěn)定及動穩(wěn)定倍數(shù)：電力系統(tǒng)故障時，電流互感器受到由于短路電流引起的巨大電流的熱效應(yīng)和電動力作用，電流互感器應(yīng)該有能夠承受而不致受到破壞的能力，這種承受的能力用熱穩(wěn)定和動穩(wěn)定倍數(shù)表示。熱穩(wěn)定倍數(shù)是指熱穩(wěn)定電流1s內(nèi)不致使電流互感器的發(fā)熱超過允許限度的電流與電流互感器的額定電流之比。動穩(wěn)定倍數(shù)是電流互感器所能承受的額定電流瞬時值與其額定電流之比。類型區(qū)分編輯按用途分類按照用途不同，電流互感器大致可分為兩類[4]：測量用電流互感器（或電流互感器的測量繞組）：在正常工作電流范圍內(nèi)，向測量、計量等裝置提供電網(wǎng)的電流信息。保護用電流互感器（或電流互感器的保護繞組）：在電網(wǎng)故障狀態(tài)下。上海喆和定制銷售西門子APT（原上海二工）ALH-0.66 80III電流互感器.</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="上海二工電流互感器貨期快,電流互感器" src="http://tyunfile.71360.com/UpLoadFile/shcmzdh/2020/2/637167088129589451/6371670881295894516977483.png"></div><p> 上海喆和定制銷售西門子電流互感器。主要技術(shù)要求額定容量：額定二次電流通過二次額定負荷時所消耗的視在功率。額定容量可以用視在功率，也可以用二次額定負荷阻抗Ω表示。一次額定電流：允許通過電流互感器一次繞組的用電負荷電流。用于電力系統(tǒng)的電流互感器一次額定電流為5～25000A，用于試驗設(shè)備的精密電流互感器為～50000A。電流互感器可在一次額定電流下長期運行，負荷電流超過額定電流值時叫做過負荷，電流互感器長期過負荷運行，會燒壞繞組或減少使用壽命。二次額定電流：允許通過電流互感器二次繞組的一次感應(yīng)電流。額定電流比（變比）：一次額定電流與二次額定電流之比。額定電壓：一次繞組長期對地能夠承受的額定電壓（有效值以kV為單位），應(yīng)不低于所接線路的額定相電壓。電流互感器的額定電壓分為，3，6，10，35，110，220，330，500kV等幾種電壓等級。10%倍數(shù)：在指定的二次負荷和任意功率因數(shù)下，電流互感器的電流誤差為－10%時，一次電流對其額定值的倍數(shù)。10%倍數(shù)是與繼電保護有關(guān)的技術(shù)指標。準確度等級：表示互感器本身誤差（比差和角差）的等級。電流互感器的準確度等級分為～1多種級別，與原來相比準確度提高很大。上海喆和定制銷售西門子APT（原上海二工）ALH-0.66 120III-P電流互感器.上?，F(xiàn)貨銷售電流互感器報價</p><p style="text-indent:25px">上海喆和定制銷售西門子APT（原上海二工）ALH-0.66 120II-P電流互感器.上海二工電流互感器貨期快</p><p> 由于一次繞組與二次繞組有相等的安培匝數(shù)，I1N1=I2N2，電流互感器額定電流比：。電流互感器實際運行中負荷阻抗很小，二次繞組接近于短路狀態(tài)，相當于一個短路運行的變壓器。2、電流互感器的接線原則(1)電流互感器二次側(cè)不允許開路。二次開路可能產(chǎn)生嚴重后果，一是鐵芯過熱，甚至燒毀互感器;二是由于二次繞組匝數(shù)很多，會感應(yīng)出危險的高電壓，危及人身和設(shè)備的安全。(2)高壓電流互感器的二次側(cè)必須有一點接地。由于高壓電流互感器的一次側(cè)為高壓，當一、二次線圈之間因絕緣損壞出線高壓擊穿時，將導(dǎo)致高壓進入低壓，如果二次線圈一點接地，則將高壓引入了大地，可確保人身及設(shè)備的安全。但應(yīng)當注意，電流互感器的二次回路只允許一點接地，而不允許再有接地，否則有可能引起分流，影響使用。低壓電流互感器的二次線圈不應(yīng)該接地。由于低壓互感器的電壓較低，一、二次線圈間的絕緣欲度大，發(fā)生一、二次線圈擊穿的可能性小，另外，二次線圈的不接地將使二次回路及儀表的絕緣能力提高，還可使雷擊燒毀儀表***減少。上海二工電流互感器貨期快</p><p style="text-indent:25px">上海喆和機電科技有限公司始建于2016-01-25，坐落于上海市靜安區(qū)恒豐北路100號，現(xiàn)有員工11~50人余人。在上海喆和機電科近多年發(fā)展歷史，公司旗下現(xiàn)有品牌西門子，施耐德，ABB，歐姆龍，LS,APT,德力西等等。公司以用心服務(wù)為重點價值,希望通過我們的專業(yè)水平和不懈努力,將從事機電科技領(lǐng)域內(nèi)的技術(shù)開發(fā)、技術(shù)咨詢、技術(shù)服務(wù)、技術(shù)轉(zhuǎn)讓,機電設(shè)備、五金交電、儀器儀表、電子產(chǎn)品、電子元器件、通訊設(shè)備(除衛(wèi)星電視廣播地面接收設(shè)施)、五金工具、橡塑制品、陶瓷制品、金屬材料、五金制品、包裝材料、建筑裝潢材料、化工原料及產(chǎn)品(除危險化學(xué)品、監(jiān)控化學(xué)品、民用物品、易制毒化學(xué)品)、管道及配件、閥門的批發(fā)、零售?！疽婪毥?jīng)批準的項目,經(jīng)相關(guān)部門批準后方可開展經(jīng)營活動】等業(yè)務(wù)進行到底。誠實、守信是對企業(yè)的經(jīng)營要求，也是我們做人的基本準則。公司致力于打造***的[ "編程控制器", "光電傳感器", "變頻器", "軟啟動器" ]。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/993878.html</p></div></div></div></div></div><div id="dh2bxtk" class="page-right twoColRt"><div id="zyar37t" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="pofmnzg" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img 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