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id="38seb7b" class="twoCol"><div id="vmtx3i2" class="page-proshow clearfix"><p class="current"> 當(dāng)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>?上海定制電流互感器好價格歡迎來電上海喆和機(jī)電科技供應(yīng)</p><div id="pfcumj8" class="leftbox clearfix"><h1>上海定制電流互感器好價格歡迎來電上海喆和機(jī)電科技供應(yīng)</h1><div id="ffxubds" class="proBig"><div id="3eq2txe" class="bigimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UpLoadFile/shcmzdh/2020/2/637167088129589451/6371670881295894516977483.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="s8zl3r9" class="smallimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UpLoadFile/shcmzdh/2020/2/637167088129589451/6371670881295894516977483.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="gbyvn3j" 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好價格,電流互感器</p><p><span>***更新：</span>2020-10-18 11:01:15</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="vt3jdz2" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">上海喆和機(jī)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(jī): </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(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="sgt2hy2" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="7ryv7wl" class="box"><p><p> 對于沒有采取補(bǔ)償措施的電流互感器，比差為負(fù)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(bǔ)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(bǔ)償。常用的補(bǔ)償法有匝數(shù)補(bǔ)償，上海定制電流互感器好價格、分?jǐn)?shù)匝補(bǔ)償、小鐵心補(bǔ)償、并聯(lián)電容補(bǔ)償?shù)龋虾６ㄖ齐娏骰ジ衅骱脙r格。校驗方法在進(jìn)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(biāo)志為P1、P2，二次繞組標(biāo)志為S1、S2。若P1、S1是同名端，則這種標(biāo)志叫減極性。一次電流從P1進(jìn)，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(jìn)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，上海定制電流互感器好價格，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?；ジ衅麒F芯有剩磁，使鐵芯磁導(dǎo)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(dá)到飽和狀態(tài)，然后再慢慢減小勵磁電流到零，以消除剩磁。上海喆和定制銷售西門子APT（原上海二工）ALH-0.66 120*50II電流互感器.上海定制電流互感器好價格</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好價格,電流互感器" src="http://tyunfile.71360.com/UpLoadFile/shcmzdh/2020/2/637167088129589451/6371670881295894516977483.png"></div><p> 電流互感器ε%誤差曲線校驗步驟：⑴按照保護(hù)裝置類型計算流過電流互感器的一次電流倍數(shù)⑵根據(jù)電流互感器的型號、變比和一次電流倍數(shù)，在10%誤差曲線上確定電流互感器的允許二次負(fù)荷⑶按照對電流互感器二次負(fù)荷**嚴(yán)重的短路類型，計算電流互感器的實際二次負(fù)荷⑷比較實際二次負(fù)荷與允許二次負(fù)荷。如實際二次負(fù)荷小于允許二次負(fù)荷，表示電流互感器的誤差不超過10%誤差：1）增大連接導(dǎo)線截面或縮短連接導(dǎo)線長度，以減小實際二次負(fù)荷2）選擇比較大的電流互感器，減小一次電流倍數(shù)，增大允許二次負(fù)荷3）將電流互感器的二次繞組串聯(lián)起來，使允許二次負(fù)荷增大一倍。動、熱穩(wěn)定度需校驗電流互感器的動穩(wěn)定度和熱穩(wěn)定度[9]，廠家的產(chǎn)品技術(shù)參數(shù)中都給出了動穩(wěn)定倍數(shù)Kes和熱穩(wěn)定倍數(shù)Kt，因此按下列公式分別校驗動穩(wěn)定和熱定度即可。1）動穩(wěn)定度校驗Kes×I1N≥2）熱穩(wěn)定度校驗（KtI1n)2t≥I⑶∞tima式中，t為熱穩(wěn)定電流時間。額定容量電流互感器二次額定容量要大于實際二次負(fù)載，實際二次負(fù)載應(yīng)為25～**二次額定容量。容量決定二次側(cè)負(fù)載阻抗，負(fù)載阻抗又影響測量或控制精度。負(fù)載阻抗主要受測量儀表和繼電器線圈電阻、電抗及接線接觸電阻、二次連接導(dǎo)線電阻的影響。上海定制電流互感器好價格上海喆和定制銷售西門子APT（原上海二工）ALH-0.66 60II-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好價格,電流互感器" src="http://tyunfile.71360.com/UpLoadFile/shcmzdh/2020/2/637167087835529280/6371670878355292804681260.png"></div><p> 上海喆和供應(yīng)西門子電流互感器。 </p> <p> <br /> </p> <p> 被測互感器與標(biāo)準(zhǔn)互感器的二次電流差一般采用互感器校驗儀進(jìn)行量。直接從互感器校驗儀上讀出比值差fx(%)，相位差δx(’)。由于互感器校驗儀測的是被測互感器與標(biāo)準(zhǔn)互感器電流差與二次電流的比值，所以對互感器校驗儀的要求不高。要能校驗什么等級的互感器，基本由標(biāo)準(zhǔn)互感器決定。 </p> <p> 標(biāo)準(zhǔn)互感器是互感器校驗系統(tǒng)的關(guān)鍵**。對被測互感器進(jìn)行校驗，除了標(biāo)準(zhǔn)互感器、互感器校驗儀還要有給互感器提供一次電流的升流器，可以調(diào)節(jié)升流器電流的調(diào)壓器，及負(fù)載。折疊編輯本段運(yùn)行特性在電工手冊及各類教材中，對電流互感器二次開路運(yùn)行的結(jié)論是：“電流互感器二次開路產(chǎn)生幾百伏、lkV～10kV的危及人身安全的高壓；鐵芯嚴(yán)重發(fā)熱，燒壞電流互感器?！边@也是電力界公認(rèn)的法規(guī)。 </p> <p> 我們科技服務(wù)小組在檢修學(xué)校配電盤的一只無示數(shù)電流表時發(fā)現(xiàn)，與其相串聯(lián)電流互感器二次開路運(yùn)行，實測電壓為2.6V，恢復(fù)其原閉路接法，同時在主回路串入型號、變化相同的電流互感器，二次開路長期運(yùn)行，并不發(fā)熱。這說明：目前實際應(yīng)用的電流互感器運(yùn)行特性與一百多年來傳統(tǒng)的結(jié)論相比，有著不容忽視的重大差別。 </p><p> 兩者的使用發(fā)展方向由于電磁式電流互感器存在的易飽和、非線性及頻帶窄等問題，電子式電流互感器逐漸興起。電子式電流互感器一般具有抗磁飽和、低功耗、寬頻帶等優(yōu)點(diǎn)。國內(nèi)具有代表性的電子式互感器有AnyWay變頻電壓傳感器、AnyWay變頻電流傳感器和變頻功率傳感器，其中，AnyWay變頻功率傳感器屬于電壓、電流組合式互感器。該互感器的主要特點(diǎn)如下1、采用前端數(shù)字化技術(shù)，光纖傳輸，電磁兼容性好。2、幅頻特性和相頻特性好，在寬幅值、頻率、相位范圍內(nèi)均可獲得較高的測量精度。3、屬于數(shù)字式傳感器，二次儀表不會引入誤差，傳感器誤差就是系統(tǒng)誤差。 </p> <p> 額定電壓電流互感器額定電壓應(yīng)大于裝設(shè)點(diǎn)線路額定電壓 [7] 。變比應(yīng)根據(jù)一次負(fù)荷計算電流IC選擇電流互感器變比。電流互感器一次側(cè)額定電流標(biāo)準(zhǔn)比（如20、30、40、50、75、100、150、2×a/C）等多種規(guī)格，二次側(cè)額定電流通常為1A或5A。其中2×a/C表示同一臺產(chǎn)品有兩種電流比，通過改變產(chǎn)品的連接片接線方式實現(xiàn)，當(dāng)串聯(lián)時，電流比為a/c，并聯(lián)時電流比為2×a/C。一般情況下，計量用電流互感器變流比的選擇應(yīng)使其一次額定電流I1n不小于線路中的負(fù)荷電流（即計算IC）。如線路中負(fù)荷計算電流為350A，則電流互感器的變流比應(yīng)選擇400/5 上海喆和定制銷售西門子APT（原上海二工）ALH-0.66 100*50II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好價格,電流互感器" src="http://tyunfile.71360.com/UpLoadFile/shcmzdh/2020/2/637167088041488527/6371670880414885276367966.png"></div><p> 電流互感器的常見問題往往與制造缺點(diǎn)有關(guān)，具體如下：電流互感器的絕緣很厚，有的絕緣包繞松散，絕緣層間有皺折，加之真空處理不良，浸漬不完全而造成含氣空腔，從而易引起局部放電故障[12]電容屏尺寸與排列不符合設(shè)計要求，電流互感器故障原因統(tǒng)計[13]甚至少放電容屏，電容極板不光滑平整，甚至錯位或斷裂，使其均壓特性破壞。因此，當(dāng)局部固體絕緣沿面的電場強(qiáng)度達(dá)到一定數(shù)值時，就會造成局部放電。上述局部放電的直接后果是使絕緣油裂解，在絕緣層間生成大量的x臘，介損增大。這種放電是有累積效應(yīng)的，任其發(fā)展下去，油中氣體分析將可能出現(xiàn)電弧放電的特征。由于絕緣材料不清潔或含濕高，可能在其表面產(chǎn)生沿面放電。這種情況多見于一次端子引線沿墊塊表面放電某些連接松動或金屬件電位懸浮將導(dǎo)致火花放電，例如一次繞組支持螺母松動，造成一次繞組屏蔽鋁箔電位懸浮，末屏引線接觸或焊接不良甚至斷線，均會引起此類故障。次連接夾板、螺栓、螺母松動，末屏接地螺母松動，抽頭緊固螺母松動等，均可能使接觸電阻增大，從而導(dǎo)致局部過熱故障。此外，現(xiàn)場維護(hù)管理不當(dāng)也應(yīng)引起重視。例如，互感器進(jìn)水受潮，雖然可能與制造廠的密封結(jié)構(gòu)和密封材料有關(guān)，但是。上海喆和定制銷售西門子APT（原上海二工）ALH-0.66 125*60II-P電流互感器.上海定制電流互感器好價格</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 200II電流互感器.上海定制電流互感器好價格</p><p> 電流互感器二次開路電壓波形分析 </p> <p> 當(dāng)一次電流為0A時，二次輸出電壓波形為一條水平線。隨著一次電流的增大，56種電流互感器波形變化十分復(fù)雜，又各具有其自身特色。如6號互感器，一次電流為3A，二次電壓波形為正弦波，一次電流從4A增至150A波形畸變，隨著一次電流增**形畸變加劇，其變化特別是有效寬度變窄，峰—峰值上升，占空因數(shù)下降，但每半周包圍的面積增加甚微。 </p> <p> 比差特性分析 </p> <p> 目前，我國計量電流時，要求用1．5mm2的銅線將電流互感器二次線圈和電度表電流線圈短接，這是降低精度產(chǎn)生正比差的應(yīng)用方法。以母線穿心式150／5的電流互感器為例，我們分別以1．5mm2長4m的銅線，將其二次線圈分別與150／5A的電流表和電度表的電流線圈串聯(lián)時，當(dāng)一次穿心電流為150A時，所有電流互感器都能使電流表碰針，若一次電流降至135A，電流表示數(shù)為140～150A。 </p> <p> 在變流實驗臺上測得8000個數(shù)據(jù)表明，當(dāng)一次電流超過額定值10％，隨著一次電流增大，正比差越來越明顯，而一次電流為15A以下時，電流互感器二次測中的電流表示數(shù)有負(fù)比差。上海定制電流互感器好價格</p><p style="text-indent:25px">上海喆和機(jī)電科技有限公司致力于電工電氣，是一家貿(mào)易型公司。公司業(yè)務(wù)涵蓋編程控制器，光電傳感器，變頻器，軟啟動器等，價格合理，品質(zhì)有保證。公司注重以質(zhì)量為中心，以服務(wù)為理念，秉持誠信為本的理念，打造電工電氣良好品牌。上海喆和機(jī)電科秉承“客戶為尊、服務(wù)為榮、創(chuàng)意為先、技術(shù)為實”的經(jīng)營理念，全力打造公司的重點(diǎn)競爭力。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/1605636.html</p></div></div></div></div></div><div id="udkwnpz" class="page-right twoColRt"><div id="sme2sz8" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="osphdkz" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img 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