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src="http://tyunfile.71360.com/UpLoadFile/shcmzdh/2020/2/637167087626920413/6371670876269204131239849.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="zyqfbne" class="smallimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UpLoadFile/shcmzdh/2020/2/637167087626920413/6371670876269204131239849.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="wvnpm8g" 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>上海定制電流互感器,電流互感器</p><p><span>***更新：</span>2020-07-27 04:03:09</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="osk7rjg" 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="imj3wdf" class="page-proshow02"><p class="title">詳細說明</p><div id="k8wi3ce" class="box"><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，上海定制電流互感器。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，上海定制電流互感器。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，上海定制電流互感器，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。上海喆和定制銷售西門子APT（原上海二工）ALH-0.66 M8-II電流互感器.上海定制電流互感器</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="上海定制電流互感器,電流互感器" src="http://tyunfile.71360.com/UpLoadFile/shcmzdh/2020/2/637167087626920413/6371670876269204131239849.png"></div><p> 對于沒有采取補償措施的電流互感器，比差為負值，角差為正值，比差的***值和角差均隨電流增大而減小。采用補償?shù)霓k法可以減小互感器的誤差。一般通過在互感器上加繞附加繞組或增添附加鐵心，以及接入相應(yīng)的電阻、電感、電容元件來補償。常用的補償法有匝數(shù)補償、分數(shù)匝補償、小鐵心補償、并聯(lián)電容補償?shù)?。校驗方法在進行電流互感器誤差試驗之前，通常需要檢查極性和退磁等試驗。極性檢查電流互感器一次繞組標志為P1、P2，二次繞組標志為S1、S2。若P1、S1是同名端，則這種標志叫減極性。一次電流從P1進，二次電流從S1出。極性檢查很簡單，除了可以在互感器校驗儀上進行檢查外，還可以使用直流檢查法。退磁檢查電流互感器在電流突然下降的情況下，互感器鐵芯可能產(chǎn)生剩磁。如電流互感器在大電流情況下突然切斷電源、二次繞組突然開路等。互感器鐵芯有剩磁，使鐵芯磁導率下降，影響互感器性能。長期使用后的互感器都應(yīng)該退磁?；ジ衅鳈z驗前也要退磁。退磁就是通過一次或二次繞組以交變的勵磁電流，給鐵芯以交變的磁場。從0開始逐漸加大交變的磁場(勵磁電流)使鐵芯達到飽和狀態(tài)，然后再慢慢減小勵磁電流到零，以消除剩磁。上海定制電流互感器上海喆和定制銷售西門子APT（原上海二工）ALH-0.66 D15-II電流互感器.</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="上海定制電流互感器,電流互感器" src="http://tyunfile.71360.com/UpLoadFile/shcmzdh/2020/2/637167087581865934/6371670875818659347638789.jpg"></div><p style="text-indent:25px"> 上海喆和供應(yīng)西門子APT電流互感器。在供電用電的線路中電流電壓比較大的小小相差懸殊從幾安到幾萬安都有。為便于二次儀表測量需要轉(zhuǎn)換為比較統(tǒng)一的電流，另外線路上的電壓都比較高如直接測量是非常危險的。電流互感器就起到變流和電氣隔離作用。較早前，顯示儀表大部分是指針式的電流電壓表，所以電流互感器的二次電流大多數(shù)是安培級的（如5A等）?，F(xiàn)在的電量測量大多數(shù)字化，而計算機的采樣的信號一般為毫安級（0-5V、4-20mA等）。微型電流互感器二次電流為毫安級，主要起大互感器與采樣之間的橋梁作用。微型電流互感器也有人稱之為“儀用電流互感器”。（“儀用電流互感器”有一層含義是在實驗室使用的多電流比精密電流互感器，一般用于擴大儀表量程。）微型電流互感器與變壓器類似也是根據(jù)電磁感應(yīng)原理工作，變壓器變換的是電壓而微型電流互感器變換的是電流罷了。如圖繞組N1接被測電流，稱為一次繞組（或原邊繞組、初級繞組）；繞組N2接測量儀表，稱為二次繞組（或副邊繞組、次級繞組）。微型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K。微型電流互感器在額定工作電流下工作時的電流比叫電流互感器額定電流比，用Kn表示。</p><p> 電氣調(diào)試是電力工作中一項重要的內(nèi)容，在電氣調(diào)試工作中，二次回路檢查又是一項重要的調(diào)試內(nèi)容，它是關(guān)系到電力系統(tǒng)的測量、保護、通訊等功能能否發(fā)揮作用的前提。在二次回路中，電流互感器的接線是否正確又是電流二次回路是否正確的基礎(chǔ)，所以電流互感器的接線正確性非常重要。很多電氣調(diào)試人員對它沒有深刻的理解，經(jīng)常搞錯，造成諸如差動保護誤動作、電度表反轉(zhuǎn)等。下面對這個問題做一個***、細致的論述。電氣調(diào)試是電力工作中一項重要的內(nèi)容，在電氣調(diào)試工作中，二次回路檢查又是一項重要的調(diào)試內(nèi)容，它是關(guān)系到電力系統(tǒng)的測量、保護、通訊等功能能否發(fā)揮作用的前提。在二次回路中，電流互感器的接線是否正確又是電流二次回路是否正確的基礎(chǔ)，所以電流互感器的接線正確性非常重要。很多電氣調(diào)試人員對它沒有深刻的理解，經(jīng)常搞錯，造成諸如差動保護誤動作、電度表反轉(zhuǎn)等。下面對這個問題做一個***、細致的論述。電流互感器的結(jié)構(gòu)較為簡單，由相互絕緣的一次繞組、二次繞組、鐵心以及構(gòu)架、殼體、接線端子等組成。其工作原理與變壓器基本相同，一次繞組的匝數(shù)(N1)較少，直接串聯(lián)于電源線路中，一次負荷電流。上海喆和定制銷售西門子APT（原上海二工）ALH-0.66 100II-P電流互感器.</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="上海定制電流互感器,電流互感器" src="http://tyunfile.71360.com/UpLoadFile/shcmzdh/2020/2/637167087883095803/6371670878830958036124787.png"></div><p> 電流互感器使用注意事項(1)極性連接要正確。電流互感器一般按減極性標注，如果極性連接不正確，就會影響計量，甚至在同**路有多臺電流互感器并聯(lián)時，全造成短路***。(2)二次回路應(yīng)設(shè)保護性接地點，并可靠連接。為防止一、二次繞組之間絕緣擊穿后高電壓竄入低壓側(cè)危及人身和儀表安全，電流互感器二次側(cè)應(yīng)設(shè)保護性接地點，接地點只允許接一個，一般將靠近電流互感器的箱體端子接地。(3)運行中二次繞組不允許開路。否則會導致以下嚴重后果：二次側(cè)出現(xiàn)高電壓，危及人身和儀表安全;出現(xiàn)過熱，可能燒壞繞組;增大計量誤差。(4)用于電能計量的電流互感器二次回路，不應(yīng)再接繼電保護裝置和自動裝置等，以防互相影響。上海喆和定制銷售西門子APT（原上海二工）ALH-0.66 80*50II電流互感器.上海優(yōu)惠特賣電流互感器貨期快</p><p style="text-indent:25px">上海喆和定制銷售西門子APT（原上海二工）ALH-0.66 170*100II電流互感器.上海定制電流互感器</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。上海定制電流互感器</p><p style="text-indent:25px">上海喆和機電科技有限公司注冊資金100-200萬元，是一家擁有11~50人***員工的企業(yè)。上海喆和機電科致力于為客戶提供質(zhì)量的[ "編程控制器", "光電傳感器", "變頻器", "軟啟動器" ]，一切以用戶需求為中心,深受廣大客戶的歡迎。公司將不斷增強企業(yè)核心競爭力，努力學習行業(yè)先進知識，遵守行業(yè)規(guī)范，植根于電工電氣行業(yè)的發(fā)展。在社會各界的鼎力支持下，經(jīng)過公司所有人員的努力，公司自2016-01-25成立以來，年營業(yè)額達到3000-5000萬元。</p></p><br /><p>文章來源地址: 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