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onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="tse3l8n" 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>饋線弧光保護模塊</p><p><span>***更新：</span>2020-05-30 03:22:00</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="mgskcyf" 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: </span>0510-85027009</p><p><span>地址: </span>長安鎮(zhèn)友誼路28號</p><p>[當前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="mkhz23t" class="page-proshow02"><p class="title">詳細說明</p><div id="ztax23o" class="box"><p><p> 1.概述 </p> <p> 中、低壓母線在發(fā)生短路故障、運行人員誤操作和誤入帶電間隔等原因產(chǎn)生的電弧光對設(shè)備及人員造成的危害極大。電弧光使開關(guān)設(shè)備內(nèi)的壓力和溫度迅速升高，如不及時切除，容易造成電纜護套著火和母線熔毀，并且產(chǎn)生大量有害氣體傷害呼吸系統(tǒng)、高溫灼傷皮膚和刺傷眼睛。短路故障時，開關(guān)設(shè)備劇烈震動使固定件松動脫落、甚至導致開關(guān)柜造成人員傷亡。中低壓母線系統(tǒng)中一般不配置**的快速母線保護，而是依賴上一級的后備過流保護切除母線故障，過流保護有延時，這就導致故障切除時間較長，饋線弧光保護模塊，增加了設(shè)備的損害程度，饋線弧光保護模塊。電弧光保護系統(tǒng)原理簡單，饋線弧光保護模塊、動作迅速可靠，能夠有效減輕電弧光對設(shè)備和人身的傷害。 </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="饋線弧光保護模塊" src="https://tyunfile.71360.com/UploadFile/keaton/637255090210332031/5312785.jpg"></div><p> 接地故障電弧起火：由于“接地故障發(fā)生的幾率遠大于帶電導體間的短路”，所以“接地故障電弧引起的火災遠多于帶電導體間的電弧火災”。這是因為“在電氣線路施工中，穿鋼管拉電線時帶電導體絕緣外皮之間并無因相對運動而產(chǎn)生的摩擦，但帶電導體絕緣外皮與鋼管間的摩擦卻使絕緣摩薄或受損。另外，發(fā)生雷擊時地面上出現(xiàn)瞬變電磁場，它對電氣線路將感應瞬態(tài)過電壓”，此時“芯線上感應的瞬態(tài)過電壓是基本相同的，而電纜梯架則因接地而為地電壓”，所以，芯線對地的電位差較大。從摩損和電位差大兩方面分析，接地故障電弧起火率自然偏高。 </p> <p> 爬電起火：爬電是指電弧不是建立在空氣間隙中的電弧，而是出現(xiàn)在設(shè)備絕緣表面上的電弧。例如電源插頭的絕緣表面上的一個或多個相線插腳和PE線插腳，它們之間的絕緣表面可能發(fā)生爬電。 </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="饋線弧光保護模塊" src="https://tyunfile.71360.com/UploadFile/keaton/637255090210488281/9985773.jpg"></div><p> 以下數(shù)據(jù)表明了一個電弧所具有的危險性: </p> <p> 壓力:已估測，在一個相距60cm的20kA故障電弧，一個人所抵受到的壓力為225kg;這種突如其來的壓力會對耳朵造成長久的傷害。 </p> <p> 溫度:電弧的溫度可以達到約為7000-8000°C </p> <p> 聲音:電弧發(fā)出的聲音強度高達160db(***聲發(fā)出的爆破聲*為130db)。 </p> <p> <br /> </p> <p> 折疊電弧光的危害 </p> <p> 開關(guān)設(shè)備內(nèi)部間隔發(fā)生故障而產(chǎn)生的電弧光會造成開關(guān)設(shè)備中的壓力和溫度迅速增加，如不及時切除、將可能造成以下重大危害: </p> <p> 電弧光中心溫度(相當于太陽表面溫度的2~4倍，約為10000~20000°C)過高導致銅排、鋁排熔毀氣化; </p> <p> 電纜熔毀，電纜護套著火; </p> <p> 開關(guān)設(shè)備劇烈振動，使固定元件松脫; </p> <p> 使上一級變壓器承受近距離短路沖擊，故障電流產(chǎn)生的電動力可能導致變壓器繞組變形引起匝間短路; </p> <p> 故障產(chǎn)生的弧光沖擊波以300m/s的速度爆發(fā)，可摧毀途中的任何物質(zhì)，若波及站內(nèi)直流系統(tǒng)導致全站直流失電，將造成無法彌補的重大損失; </p> <p> 燃燒產(chǎn)生的0氣體被人吸入會產(chǎn)生生命危險; </p> <p> 高溫灼傷皮膚，強光刺傷眼睛 </p> <p> 爆破音振損傷耳膜，肺臟; </p> <p> 碎片飛射，造成人員傷亡。 </p> <p> <br /> </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="饋線弧光保護模塊" src="https://tyunfile.71360.com/UploadFile/keaton/637255090210458984/175496.jpg"></div></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/82880.html</p></div></div></div></div></div><div id="tszbnu8" class="page-right twoColRt"><div id="iryvrry" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="tsu8888" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img src="http://tyunfile.71360.com/UpLoadFile/2019/11/1/14/637082168864691056_lgpj_5374157.jpg" alt="福建ZF配件哪家強信息推薦自業(yè)物資供應" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></div><p>福建ZF配件哪家強信息推薦自業(yè)物資供應</p></a></div><div id="gf3f4pj" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/846569.html"><div><img 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