上海APT電流互感器全國發(fā)貨歡迎咨詢上海喆和機(jī)電科技供應(yīng)-b2b網(wǎng)站_b2b電子商務(wù)平臺【買產(chǎn)品】-上?？谄蚴称酚邢薰?/title><meta name="description" content="電流互感器二次開路電壓特性對每一種電流互感器，二次開路電壓隨著一次電流的變化，都有嚴(yán)格的對應(yīng)關(guān)系，*以一次額定電流時(shí)的二次開路電壓值說明。對母線穿心式150／5的電流互感器，當(dāng)穿心電流為額定值時(shí)，不同品種的電流互感器二次開路電壓為2．6～2"><meta name="keywords" content="上海APT電流互感器全國發(fā)貨,電流互感器"><link rel="canonical" href="http://m.cdcfah.com/"/><meta name="applicable-device" content="pc"><link rel="shortcut icon" href="/static/new_net_01/images/favicon.ico"><link rel="stylesheet" href="/static/new_net_01/css/slick.css" /><link rel="stylesheet" href="/static/new_net_01/css/addnew.css"><link rel="stylesheet" href="/static/new_net_01/css/sidenav.css"><link rel="stylesheet" href="/static/new_net_01/css/style.css" /><link rel="stylesheet" href="/static/new_net_01/css/tab.css"><link rel="stylesheet" href="/static/new_net_01/css/404.css"> <meta name="baidu-site-verification" content="OBVzrC9aaQ" /> <meta http-equiv="Cache-Control" 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clearfix"><h1>上海APT電流互感器全國發(fā)貨歡迎咨詢上海喆和機(jī)電科技供應(yīng)</h1><div id="3vczwdh" class="proBig"><div id="srtv8km" class="bigimg"><div><p class="pic"><img src="http://tyunfile.71360.com/WaterMark/UpLoadFile/shcmzdh/2020/2/637167087454347244/6371670874543472446544135.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="jo8ykg8" class="smallimg"><div><p class="pic"><img src="http://tyunfile.71360.com/WaterMark/UpLoadFile/shcmzdh/2020/2/637167087454347244/6371670874543472446544135.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="ihoq8r7" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價(jià)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APT電流互感器全國發(fā)貨,電流互感器</p><p><span>***更新：</span>2021-01-18 15:03:18</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="8jvxtvk" 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="gamyp8k" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="gvhy2du" class="box"><p><p> 電流互感器二次開路電壓特性 </p> <p> 對每一種電流互感器，二次開路電壓隨著一次電流的變化，都有嚴(yán)格的對應(yīng)關(guān)系，*以一次額定電流時(shí)的二次開路電壓值說明。對母線穿心式150／5的電流互感器，當(dāng)穿心電流為額定值時(shí)，不同品種的電流互感器二次開路電壓為2．6～2；4V。80條二次開路電壓特性曲線的規(guī)律是：一次穿心電流從0A增至150A時(shí)，上海APT電流互感器全國發(fā)貨，上海APT電流互感器全國發(fā)貨，二次開路電壓開始上升幅度很大，30A以后增加甚小(即使從150A增至800A，二次開路電壓平均只上升0．2V)。 </p> <p> 母線穿心式200/5的電流互感器，二次開路電壓是3．9～6．5V；母線穿心式 300／5—2000／5的電流互感器，二次開路電壓為6．5～37．2V。 </p> <p> LQG系列從30／5—600／5的電流互感器，二次開路電壓是12．8～21．4V。 </p> <p> 變電站用的LQJ，LFC，LFCD系列50／5～300／5的電流互感器，二次開路電壓是18～121．3V。 </p> <p> 在第二次伏安特實(shí)驗(yàn)臺上，利用調(diào)壓器、電流表、導(dǎo)線將所有的電流互感器二次線圈分別接人調(diào)壓器的輸出端，當(dāng)二次輸入5A電流時(shí)，測得二次電壓和一次加額定電流時(shí)測得的二次開路電壓都有嚴(yán)格的對應(yīng)關(guān)系。若用公式計(jì)算，上海APT電流互感器全國發(fā)貨，二次開路電壓等于二次閉路轉(zhuǎn)為開路一次電壓的增量乘以變化。從正反兩方面實(shí)驗(yàn)和法拉第電磁感應(yīng)定律推導(dǎo)結(jié)論證明了二次開路電壓測試值的真實(shí)性上海喆和定制銷售西門子APT（原上海二工）ALH-0.66 80I電流互感器.上海APT電流互感器全國發(fā)貨</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="上海APT電流互感器全國發(fā)貨,電流互感器" src="http://tyunfile.71360.com/WaterMark/UpLoadFile/shcmzdh/2020/2/637167087454347244/6371670874543472446544135.png"></div><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(shí)，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(jì)量電流時(shí)，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(shí)，當(dāng)一次穿心電流為150A時(shí)，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(shí)驗(yàn)臺上測得8000個(gè)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(shí)，電流互感器二次測中的電流表示數(shù)有負(fù)比差。上海優(yōu)惠特賣電流互感器信譽(yù)好上海喆和定制銷售西門子APT（原上海二工）ALH-0.66 100*80II電流互感器.</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="上海APT電流互感器全國發(fā)貨,電流互感器" src="http://tyunfile.71360.com/UpLoadFile/shcmzdh/2020/2/637167087835529280/6371670878355292804681260.png"></div><p style="text-indent:25px"> 蘇州西門子電器有限公司，簡稱“西門子APT”電流互感器Φ，補(bǔ)償方法先進(jìn)，工藝技術(shù)精湛，性能安全可靠，外形小巧美觀，種類齊全，一般作控制、保護(hù)、測量用途。Φ型電流互感器適用于小電流小空間的場所，特別適用于抽屜柜。可采用導(dǎo)軌直接安裝(或可采用本廠配置的底柜安裝)，也可采用母線直徑安裝。一次側(cè)采用直接穿芯的方法，不需要斷開導(dǎo)線，穿芯孔徑可分為Φ8mm、Φ12mm、Φ15mm和Φ22mm四種。內(nèi)部鐵芯選用質(zhì)量硅鋼片；符合；通過國家計(jì)量認(rèn)證；額定工作電壓(Un)：AC660V二次電流分為5A和1A；額定頻率：50～60Hz額定連續(xù)熱電流(Icth)：xIpn額定短時(shí)熱電流（Ith）：60xIpn（1sec.）工頻耐壓：3kV（1min,50Hz;外殼與二次端子間）絕緣等級：E接線端子的型式：螺釘壓片緊固式(螺紋為M4)操作力矩：擰緊力矩～,額定承受力矩防護(hù)等級：端子IP00，外殼IP40。</p><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(yàn)儀進(jìn)行量。直接從互感器校驗(yàn)儀上讀出比值差fx(%)，相位差δx(’)。由于互感器校驗(yàn)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(yàn)儀的要求不高。要能校驗(yàn)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(yàn)系統(tǒng)的關(guān)鍵**。對被測互感器進(jìn)行校驗(yàn)，除了標(biāo)準(zhǔn)互感器、互感器校驗(yàn)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(shí)發(fā)現(xiàn)，與其相串聯(lián)電流互感器二次開路運(yùn)行，實(shí)測電壓為2.6V，恢復(fù)其原閉路接法，同時(shí)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(shí)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。上海喆和定制銷售西門子APT（原上海二工）ALH-0.66 D12電流互感器.</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="上海APT電流互感器全國發(fā)貨,電流互感器" src="http://tyunfile.71360.com/UpLoadFile/shcmzdh/2020/2/637167087973056246/6371670879730562466968566.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(zhǔn)確級選擇的原則：計(jì)費(fèi)計(jì)量用的電流互感器其準(zhǔn)確級不低于0．5級；用于監(jiān)視各進(jìn)出線回路中負(fù)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(zhǔn)確度誤差不超過規(guī)定值，一般還校驗(yàn)電流互感器二次負(fù)荷（伏安），互感器二次負(fù)荷S2不大于額定負(fù)荷S2n，所選準(zhǔn)確度才能得到保證。準(zhǔn)確度校驗(yàn)公式：S2≤S2n。二次回路的負(fù)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(fù)荷和阻抗，RXC為二次回路中所有接頭、觸點(diǎn)的接觸電阻，一般取0．1Ω，RWL為二次回路導(dǎo)線電阻，計(jì)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(jì)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(hù)用的電流互感器的準(zhǔn)確度常用的有5P和l0P。保護(hù)級的準(zhǔn)確度是以額定準(zhǔn)確限值一次電流下的電流互感器額定復(fù)合誤差ε%來標(biāo)稱的（如5P對應(yīng)的ε%=5%）。上海喆和定制銷售西門子APT（原上海二工）ALH-0.66 130II-P電流互感器.上海優(yōu)惠特賣電流互感器信譽(yù)好</p><p style="text-indent:25px">上海喆和定制銷售西門子APT（原上海二工）ALH-0.66 120*65II電流互感器.上海APT電流互感器全國發(fā)貨</p><p style="text-indent:25px"> 上海喆和供應(yīng)西門子APT電流互感器。電流互感器接線方式額定變比和誤差互感器的額定變比KN指電壓互感器的額定電壓比和電流互感器的額定電流比。前者定義為原邊繞組額定電壓U1N與副邊繞組額定電壓U2N之比；后者則為額定電流I1N與I2N之比。即KN=U1N/U2N（對電壓互感器）KN=I1N/I2N（對電流互感器）電壓（或電流）互感器原邊電壓（或電流）在一定范圍內(nèi)變動(dòng)時(shí)，一般規(guī)定為～（或10～120%I1N），副邊電壓（或電流）應(yīng)按比例變化，而且原、副邊電壓（或電流）應(yīng)該同相位。但由于互感器存在內(nèi)阻抗、勵(lì)磁電流和損耗等因素而使比值及相位出現(xiàn)誤差，分別稱為比差和角差。比差為經(jīng)折算后的二次電壓（或二次電流）與一次電壓（或一次電流）量值大小之差對后者之比，即fU為電壓互感器的比差，fI為電流互感器的比差。當(dāng)KNU2>U1（或KNI2>I1）時(shí)，比差為正，反之為負(fù)。對沒有采取補(bǔ)償措施的電壓互感器，比差為負(fù)，角差一般為正值，比差的比較的值和角差均隨電壓的增大而減??；鐵心飽和時(shí)，比差與角差均隨電壓的增大而增大。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，比差的比較的值和角差均隨電流增大而減小。上海APT電流互感器全國發(fā)貨</p><p style="text-indent:25px">上海喆和機(jī)電科技有限公司是一家有著雄厚實(shí)力背景、信譽(yù)可靠、勵(lì)精圖治、展望未來、有夢想有目標(biāo)，有組織有體系的公司，堅(jiān)持于帶領(lǐng)員工在未來的道路上大放光明，攜手共畫藍(lán)圖，在上海市市轄區(qū)等地區(qū)的電工電氣行業(yè)中積累了大批忠誠的客戶粉絲源，也收獲了良好的用戶口碑，為公司的發(fā)展奠定的良好的行業(yè)基礎(chǔ)，也希望未來公司能成為*****，努力為行業(yè)領(lǐng)域的發(fā)展奉獻(xiàn)出自己的一份力量，我們相信精益求精的工作態(tài)度和不斷的完善創(chuàng)新理念以及自強(qiáng)不息，斗志昂揚(yáng)的的企業(yè)精神將** 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