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<meta http-equiv="Cache-Control" content="no-siteapp" /> <script>var V_PATH="/";window.onerror=function(){ return true; };</script> </head><body> <h1><a href="http://www.cdcfah.com/">六月丁香婷婷亚洲中文字幕,欧美精品高清一区二区蜜芽,尤物92午夜福利视频,精品视频一区二区三区在线观看</a></h1> <div style="position:fixed;left:-9000px;top:-9000px;"><object id="qgqbi"></object><delect id="qgqbi"><sub id="qgqbi"><dl id="qgqbi"></dl></sub></delect><track id="qgqbi"></track><tr id="qgqbi"></tr><video id="qgqbi"></video><xmp id="qgqbi"><span id="qgqbi"></span></xmp><span id="qgqbi"></span><strong id="qgqbi"><em id="qgqbi"><sup id="qgqbi"><progress id="qgqbi"></progress></sup></em></strong><dl id="qgqbi"><small id="qgqbi"></small></dl><wbr id="qgqbi"></wbr><noscript id="qgqbi"></noscript><tr id="qgqbi"></tr><track id="qgqbi"><dl id="qgqbi"></dl></track><label id="qgqbi"><em id="qgqbi"></em></label><tbody id="qgqbi"></tbody><blockquote id="qgqbi"></blockquote><dfn id="qgqbi"><center id="qgqbi"></center></dfn><sub id="qgqbi"></sub><u 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class="proBig"><div id="jxfdt57" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/keaton/637237707519960937/5143524.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="7pljpvr" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/keaton/637237707519960937/5143524.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="hpntzft" 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(guān)鍵詞：</span>多功能電力儀表品牌</p><p><span>***更新：</span>2020-06-26 13:23:32</p><p><span id="click" >瀏覽次數(shù)：1次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="jx9djhn" 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(jī): </span>0510-85027009</p><p><span>地址: </span>長安鎮(zhèn)友誼路28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="bhxvjx9" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="tndl9nl" class="box"><p><p> 諧波及無功問題 </p> <p> 諧波以及無功是電網(wǎng)電能質(zhì)量的重要指標(biāo)，無論對于電網(wǎng)還是用戶都有重要的意義。諧波和無功雖然是兩個相對**的問題，但是二者之間又有非常緊密的聯(lián)系。這是因為： </p> <p> (1)諧波除其本身的問題之外，也影響負(fù)荷和電網(wǎng)的無功功率； </p> <p> (2)產(chǎn)生諧波的裝置同時大都也是消耗基波無功功率的裝置； </p> <p> (3)治理諧波的裝置通常也都是補(bǔ)償基波無功功率的裝置。 [2] </p> <p> 具體指標(biāo) </p> <p> 電網(wǎng)頻率 </p> <p> 我國電力系統(tǒng)的標(biāo)稱頻率為50Hz </p> <p> ，GB/T15945-2008《電能質(zhì)量電力系統(tǒng)頻率偏差》中規(guī)定：電力系統(tǒng)正常運(yùn)行條件下頻率偏差限值為±0.2Hz，當(dāng)系統(tǒng)容量較小時，偏差限值可以放寬到±0.5Hz，標(biāo)準(zhǔn)中沒有說明系統(tǒng)容量大小的界限。在《全國供用電規(guī)則》中規(guī)定"供電局供電頻率的允許偏差：電網(wǎng)容量在300萬千瓦及以上者為±0.2HZ；電網(wǎng)容量在300萬千瓦以下者，為±0.5HZ，多功能電力儀表品牌。實際運(yùn)行中，從全國各大電力系統(tǒng)運(yùn)行看都保持在不大于±0，多功能電力儀表品牌，多功能電力儀表品牌.1HZ范圍內(nèi)。 </p> <p> 電壓偏差 </p> <p> GB/T 12325-2008 《電能質(zhì)量供電電壓偏差》中規(guī)定：35kV及以上供電電壓正、負(fù)偏差值之和不超過標(biāo)稱電壓的10%；20kV及以下三相供電電壓允許偏差為標(biāo)稱電壓的土7%；220V單相供電電壓允許偏差為標(biāo)稱電壓的+7%，－10%。 </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="多功能電力儀表品牌" src="https://tyunfile.71360.com/WaterMark/UploadFile/keaton/637237707519960937/5143524.jpg"></div><p> 關(guān)于多功能電力儀表U、I、P等測量不準(zhǔn)確： </p> <p> 需要確保正確的電壓和電流信號已經(jīng)連接到多功能電力儀表上，可以使用萬用表來測量電壓信號，必要時候使用鉗形表來測量電流信號。其次要確保信號線的連接是正確的比如電流信號的進(jìn)線端以及各相的相序是否出錯。多功能電力儀表可以觀察功率界面顯示，只有在反向送點情況下有功功率為負(fù)，一般使用情況下有功功率符號為正，如果有功功率符號為負(fù)，有可能電流進(jìn)線接錯，當(dāng)然相序接錯也會導(dǎo)致功率顯示異常。另外需要注意的是多功能電力儀表顯示的電量為一次電網(wǎng)值，如果表內(nèi)設(shè)置的電壓電流互感器的倍率與實際使互感器不致，也會導(dǎo)致多功能電力儀表電量顯示不準(zhǔn)確。 </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="多功能電力儀表品牌" src="https://tyunfile.71360.com/WaterMark/UploadFile/keaton/637237707521308594/2790389.jpg"></div><p> JD969EY產(chǎn)品功能特點 </p> <p> 實時測量量: 電壓、電流、功率、功率因數(shù)、頻率、電壓及電流不平衡率； </p> <p> 具有電流電壓2-31次諧波測量，2-63次諧波測量功能。 </p> <p> 具有電話波形因子，電壓波峰系數(shù)測量 </p> <p> 具有需量統(tǒng)計功能 </p> <p> 保存電壓、電流、功率極值及發(fā)生時間的數(shù)據(jù)記錄； </p> <p> 分時計量正反向有功和四象限無功電能，并可任意設(shè)置組合有功和組合無功電能； </p> <p> 分時計量正反向有功和四象限無功比較大需量及發(fā)生時間； </p> <p> 具有復(fù)費率計量功能，4個費率8個時段 </p> <p> 具有100條SOE事件報告功能 </p> <p> 4路開關(guān)量輸入，4路電磁繼電器輸出； </p> <p> 2路電能（有功和無功）脈沖輸出； </p></p><br /><p>文章來源地址: 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