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clearfix"><section class="container clearfix tcPro"><section class="home-main container clearfix"><div id="diulnzl" class="twoCol"><div id="nxugipm" 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-_txcp/">通信產(chǎn)品</a>?<a href="http://www.cdcfah.com/cp/second-txcp_csjhsb/">傳輸、交換設(shè)備</a>?<a href="http://www.cdcfah.com/cp/third-csjhsb_dhjhj/">電話交換機(jī)</a>?豐都電話交換機(jī)價格南京德世偉業(yè)軟件技術(shù)供應(yīng)</p><div id="r3jvi2m" class="leftbox clearfix"><h1>豐都電話交換機(jī)價格南京德世偉業(yè)軟件技術(shù)供應(yīng)</h1><div id="lv7uapg" class="proBig"><div id="xmj33zy" class="bigimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UpLoadFile/2019/7/17/14/636989706097149850_njdswy_3649872.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="wgi29f7" class="smallimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UpLoadFile/2019/7/17/14/636989706097149850_njdswy_3649872.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="hl8m38p" 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>豐都電話交換機(jī)價格</p><p><span>***更新：</span>2020-05-23 12:28:11</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="nxqgija" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">南京德世偉業(yè)軟件技術(shù)有限公司</a></p><p><span>聯(lián)系人：</span>李永亮</p><p><span>郵箱: </span>634765682@qq.com</p><p><span>電話: </span>13276689930</p><p><span>傳真: </span>025_84728227</p><p><span>網(wǎng)址: </span></p><p><span>手機(jī): </span>025-84728227</p><p><span>地址: </span>經(jīng)濟(jì)開發(fā)區(qū)恒盛路5號4號樓215-D室</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="xcebdkw" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="x8qhjli" class="box"><p><p style="text-indent:25px">熱敏電阻熱敏電阻可用作加熱元件外，同時還能起到“開關(guān)”的作用，兼有敏感元件、加熱器和開關(guān)三種功能，稱之為“熱敏開關(guān)”．電流通過元件后引起溫度升高，即發(fā)熱體的溫度上升，當(dāng)超過居里點(diǎn)溫度后，電阻增加，從而限制電流增加，于是電流的下降增加元件溫度降低，電阻值的減小又使電路電流增加，元件溫度升高，周而復(fù)始，因此具有使溫度保持在特定范圍的功能，又起到開關(guān)作用．利用這種阻溫特性做成加熱源，作為加熱元件應(yīng)用的有暖風(fēng)器、電烙鐵、烘衣柜、空調(diào)等，還可對電器起到過熱保護(hù)作用． NTC熱敏電阻器是一種負(fù)溫度系數(shù)熱敏電阻器，該產(chǎn)品的電阻值隨溫度升高而降低，根據(jù)其作用封裝成各種形狀以及具有不同的技術(shù)指標(biāo)。該產(chǎn)品主要用于溫度補(bǔ)償、溫度測量和在各類電源中吸收浪涌電流作為線路保護(hù)元件。同樣與壓敏電阻類似，熱敏電阻同樣在集團(tuán)電話交換機(jī)生產(chǎn)設(shè)計的時候已經(jīng)***采用。上述兩道防護(hù)措施防護(hù)普通的過流過壓保護(hù)已經(jīng)足夠了，豐都電話交換機(jī)價格，但*靠它門來對付高達(dá)上萬V的雷電時它們就力不從心了，瞬間會被擊穿、損壞，豐都電話交換機(jī)價格。壓敏電阻和熱敏電阻共同的特點(diǎn)是：反映速度快能盡量避免高壓通過的瞬間損害設(shè)備，豐都電話交換機(jī)價格，抗壓系數(shù)低，都是在低電壓的工作狀態(tài)。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="豐都電話交換機(jī)價格" src="http://tyunfile.71360.com/UpLoadFile/2019/7/17/14/636989706097149850_njdswy_3649872.png"></div><p style="text-indent:25px">氣體放電管陶瓷氣體放電管是在放電間隙內(nèi)充入適當(dāng)?shù)亩栊詺怏w介質(zhì)。配以高活性的電子發(fā)射材料及放電引燃機(jī)構(gòu)，通過貴金屬焊料高溫封接而成的一種特殊的金屬陶瓷結(jié)構(gòu)的氣體放電器件。它可用于瞬間過電壓防浪涌，也可用作點(diǎn)火。其高阻抗、低極間電容和高耐沖擊電流是其它放電管所不具備的。當(dāng)線路有瞬時過電壓竄入時，放電管被擊穿，阻抗迅速下降，幾乎是短路狀態(tài)。放電管將大電流通過線路接地或回路泄放，也將電壓限制在低電位，從而保護(hù)了線路及設(shè)備。當(dāng)過電壓浪涌消失后，又迅速的恢復(fù)到的高阻狀態(tài)，保證線路的正常工作。氣體放電管的特點(diǎn)是：抗高壓、抗高電流沖擊（75-4000V），但在響應(yīng)時間上會比低壓防護(hù)電路元件要慢，放電時間長、動作靈敏度不夠理想，對于波頭上升陡度較大的雷電波難以有效地抑制。相對放電時間越短、耐壓越高的**其性能會越好當(dāng)然造價會越高。在電話交換機(jī)行業(yè)應(yīng)用上把氣體放電管類的產(chǎn)品用做配線部分也就是外部的防雷、防高壓措施。也就是我們建議廣大用戶配該類放雷措施的主要組成器件，銜接于電話交換機(jī)與線路之間。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="豐都電話交換機(jī)價格" src="http://tyunfile.71360.com/UpLoadFile/2019/7/17/14/636989706098401482_njdswy_2381943.png"></div></p><br /><p>文章來源地址: 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