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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>?上海質(zhì)量電話交換機(jī) 南京德世偉業(yè)軟件技術(shù)供應(yīng)</p><div id="d2pjfml" class="leftbox clearfix"><h1>上海質(zhì)量電話交換機(jī) 南京德世偉業(yè)軟件技術(shù)供應(yīng)</h1><div id="wnk89d4" class="proBig"><div id="cbda2gv" class="bigimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UpLoadFile/2019/7/17/14/636989706098401482_njdswy_2381943.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="pz3z8vp" class="smallimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UpLoadFile/2019/7/17/14/636989706098401482_njdswy_2381943.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="sheldvp" 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>上海質(zhì)量電話交換機(jī)</p><p><span>***更新：</span>2020-06-26 10:18:16</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="v33wlcz" 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="hqnaxo8" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="o84yfxz" class="box"><p><p style="text-indent:25px">電話交換機(jī)內(nèi)部采用壓敏電阻+熱敏電阻+外部氣體放電管構(gòu)建成三級防雷措施，當(dāng)然也有更高級別的防護(hù)措施的如：高精斷的昂貴儀器采用四級、五級的防護(hù)措施，但由于其造價也非常昂貴用做電話交換機(jī)行業(yè)顯然不太現(xiàn)實。雷電很強(qiáng)大，有時候大的你無法想象，任何一種措施都無法**完全避免雷電的損害。對于集團(tuán)電話交換機(jī)設(shè)備來說有高于5V的電壓就有損壞設(shè)備的可能，所以一般的防雷措施都是盡量的去避免雷電的損壞、減少損壞的程度。根據(jù)我們的經(jīng)驗：完全沒有防護(hù)措施的設(shè)備在遭遇中、輕度雷電的損壞的情況損壞程度會達(dá)到70%以上，擁有內(nèi)部元件級防護(hù)（壓/熱敏元件）損失程度在50-20%之間，采用質(zhì)量好的三級防護(hù)損失程度會在20%--0% 輕微損壞或完全防護(hù)。各級放護(hù)元件根據(jù)其特性、標(biāo)準(zhǔn)值會有一個極限值當(dāng)遭遇強(qiáng)電超出其可耐受范圍時就會出現(xiàn)“魚死網(wǎng)破”的局面…，上海質(zhì)量電話交換機(jī).，上海質(zhì)量電話交換機(jī).防護(hù)元件在消耗一部分能量之后會被擊傳！損壞，上海質(zhì)量電話交換機(jī)、甚至炸裂…這種現(xiàn)象會導(dǎo)致防護(hù)元件無法重復(fù)使用必須更換，但相對于減輕對設(shè)備價值角度來講這點損失是完全有必要的。所以即使有相關(guān)的防護(hù)措施的用戶應(yīng)當(dāng)在雷雨過后或每年雷雨季節(jié)到來之前檢查是否完好。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="上海質(zhì)量電話交換機(jī)" src="http://tyunfile.71360.com/UpLoadFile/2019/7/17/14/636989706098401482_njdswy_2381943.png"></div><p style="text-indent:25px">對任何一個企業(yè)對于設(shè)備采購、應(yīng)用的花費都是屬于投資價值，使用的周期越長、功能越完善、減少維護(hù)費用、故障率意味著對設(shè)備的投資價值得一體現(xiàn)，電話交換機(jī)做為一種企業(yè)通信辦公設(shè)備也不例外。在某些雷雨多發(fā)區(qū)域，雷電的危害被宿稱為：電話交換機(jī)***….每年此類設(shè)備遭受雷電的損壞不計其數(shù)，很大一部分設(shè)備是由于此原因而光榮“退伍”。由此集團(tuán)電話交換機(jī)、程控交換機(jī)防雷設(shè)備彰現(xiàn)出其很大價值。減少直接損害：防雷措施可以避免由于雷電等過壓、過流的原因?qū)е略O(shè)備的直接損壞或減少對設(shè)備的直接損壞。延長設(shè)備使用周期。非重復(fù)性投資：防雷設(shè)備可以伴隨電話交換機(jī)、程控交換機(jī)、調(diào)度機(jī)等設(shè)備的“一生”。通常設(shè)備的正常使用壽命周期大約在5-10年（視老化情況），而防雷設(shè)備幾乎不存在老化的情況，即使更換設(shè)備原有的防護(hù)設(shè)備仍然可以繼續(xù)有效使用。 3，低維護(hù)成本正常情況下，防雷設(shè)備是不需要維護(hù)，即使發(fā)生了每一次的損耗，如：被擊傳等現(xiàn)象，*需要更換該線路的**元件。每一次損耗都是對設(shè)備保護(hù)價值的體現(xiàn)。幾百元至幾千元的防雷設(shè)備投資對數(shù)千元甚至數(shù)萬的設(shè)備來講，完全是有價值的。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="上海質(zhì)量電話交換機(jī)" src="http://tyunfile.71360.com/UpLoadFile/2019/7/17/14/636989706097149850_njdswy_3649872.png"></div><p style="text-indent:25px">電話交換機(jī)常見防雷（過流、過壓）保護(hù)器件及其應(yīng)用特性壓敏電阻：壓敏電阻是在一定電流電壓范圍內(nèi)電阻值隨電壓而變的電阻，壓敏電阻器的電阻體材料是半導(dǎo)體，所以它是半導(dǎo)體電阻器的一個品種?，F(xiàn)在大量使用的是"氧化鋅"（ZnO）壓敏電阻器。壓敏電阻有什么用？壓敏電阻的比較大特點是當(dāng)加在它上面的電壓低于它的閥值"UN"時，流過它的電流極小，相當(dāng)于一只關(guān)死的閥門，當(dāng)電壓超過UN時，流過它的電流激增，相當(dāng)于閥門打開。利用這一功能，可以抑制電路中經(jīng)常出現(xiàn)的異常過電壓，保護(hù)電路免受過電壓的損害。其特點是：反映速度快、耐高壓系數(shù)底，適用于元件級別的保護(hù)、靜電保護(hù)、浪涌保護(hù)。現(xiàn)在我們現(xiàn)在電話交換機(jī)設(shè)計生產(chǎn)的時候基本都使用了氧化鋅壓敏電阻，這里使用的壓敏電阻的閥值電壓約為270V，當(dāng)電壓小于270V時（正常值為220V）它相當(dāng)于不導(dǎo)通，而當(dāng)電源異常，短時超過270V時，它就導(dǎo)通，形成短路，將電壓限制在270V。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/397351.html</p></div></div></div></div></div><div id="fpme8fx" class="page-right twoColRt"><div id="e74zgiu" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="lvsub72" class="recomPic likePro"><a 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