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clearfix"><h1>河南消防電線電纜招代理河南金水電纜集團(tuán)供應(yīng)</h1><div id="srjgykr" class="proBig"><div id="pzrtqhj" class="bigimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UpLoadFile/2019/11/29/11/637106243921380941_jsdianlan_6075738.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="ncur7eg" class="smallimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UpLoadFile/2019/11/29/11/637106243921380941_jsdianlan_6075738.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="od8npwy" 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>河南省</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>河南消防電線電纜招代理</p><p><span>***更新：</span>2020-06-03 10:11:02</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="uew7wcz" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">河南金水電纜集團(tuán)有限公司</a></p><p><span>聯(lián)系人：</span>候慧玲</p><p><span>郵箱: </span>1159360272@qq.com</p><p><span>電話: </span>15038356255</p><p><span>傳真: </span>0373_7107197</p><p><span>網(wǎng)址: </span></p><p><span>手機(jī): </span>0373-7107188</p><p><span>地址: </span>新鄉(xiāng)市平原示范區(qū)嵩山大道6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="jy2iacj" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="mwogdkm" class="box"><p><p> 變頻電源的頻率調(diào)節(jié)范圍比較寬，但其波形是一個主頻率的頻帶輪廓，包含了許多高次諧波，幅值也較大。這種諧波必然會波及到電纜，有可能會引起電纜的擊穿，而且電纜長度越長，高頻諧波電壓也越高。但是，河南消防電線電纜招代理，如果電纜絕緣耐壓水平較高的話，則不會發(fā)生電纜的擊穿。外部環(huán)境對變頻電纜的影響主要是變頻器產(chǎn)生的高次諧波的影響。對于交—直—交型的變頻器，由于采用了開關(guān)的切換技術(shù)，使其輸出的不再是正弦波，而是可分解為正弦基波和高次諧波的階梯波。如果電纜的結(jié)構(gòu)采用普通的3+1芯，即三根主線芯和一零線，這將會使主線芯和零線產(chǎn)生的干擾和諧波電壓不均衡，河南消防電線電纜招代理，要使電纜能正常工作，河南消防電線電纜招代理，勢必需要增加電纜的絕緣水平。若主線芯與零線位置采用對稱結(jié)構(gòu)，那么由于導(dǎo)線互換效應(yīng)及其對稱平衡，可將干擾減小到比較低水平，采用一般的絕緣水平即可，所以電纜設(shè)計(jì)應(yīng)采用對稱結(jié)構(gòu)的型式。 </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="河南消防電線電纜招代理" src="http://tyunfile.71360.com/UpLoadFile/2019/11/29/11/637106243921380941_jsdianlan_6075738.png"></div><p style="text-indent:25px"> 在冬季，隨著氣溫驟降，給電線電纜行業(yè)帶來了一定的影響，明顯的影響便是電纜敷設(shè)難度有所增加。比如眾所周知，在低溫下粘性油浸紙絕緣電纜的油粘度加大，敷設(shè)施工容易損傷絕緣，而不滴流電纜的浸漬劑粘度較大，低溫敷設(shè)對其影響更大。那么在這樣的情況下，冬季電纜敷設(shè)時應(yīng)該如何去著手，如何做好充分的準(zhǔn)備，以避免沒必要的損失呢?幾種常用電纜的規(guī)定GB/T12706《額定電壓1kV到35kV擠包絕緣電力電纜及附件》規(guī)定了允許彎曲半徑、護(hù)套的低溫性能試驗(yàn)，未明確電纜的比較低使用溫度和敷設(shè)溫度。GB/T9330《塑料絕緣控制電纜》規(guī)定了絕緣和護(hù)套的低溫彎曲、拉伸和沖擊性能要求，規(guī)定了電纜敷設(shè)溫度不低于0℃，無鎧裝電纜允許彎曲半徑不小于電纜直徑的6倍，有鎧裝或屏蔽結(jié)構(gòu)的電纜不小于電纜直徑的12倍，有屏蔽結(jié)構(gòu)的軟電纜不小于電纜直徑的6倍，未規(guī)定電纜的比較低使用溫度。GB/T5023《額定電壓450/750V及以下聚氯乙烯絕緣電纜》規(guī)定了低溫彈性和沖擊試驗(yàn)，包括絕緣和護(hù)套的低溫彎曲、低溫拉伸、產(chǎn)品電纜的低溫沖擊試驗(yàn)，未明確電纜的比較低使用溫度和敷設(shè)溫度以及電纜的允許彎曲半徑。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="河南消防電線電纜招代理" src="http://tyunfile.71360.com/UpLoadFile/2019/11/29/11/637106243914979693_jsdianlan_7367800.jpg"></div><p style="text-indent:25px">金水電纜生產(chǎn)的銅芯電纜的好處有：1.電阻率低：鋁芯電纜的電阻率比銅芯電纜約高。2.延展性好：電工用銅的延展率在30%以上。3.強(qiáng)度高：常溫下的允許應(yīng)力，銅比鋁分別高出7~28%。4.抗疲勞：鋁材反復(fù)折彎易斷裂，銅則不易。彈性指標(biāo)方面，銅也比鋁高約。5.穩(wěn)定性好：銅芯抗氧化，耐腐蝕，而鋁芯容易受氧化和腐蝕。6.載流量大：由于電阻率低，同截面的銅芯電纜要比鋁芯電纜允許的載流量(能夠通過的比較大電流)高30%左右。7.能耗低：由于銅的電阻率低，相比鋁電纜而言，銅電纜的電能損耗低。這有利于提高發(fā)電利用率和保護(hù)環(huán)境。8.施工方便：①銅芯柔性好，允許的彎度半徑小，所以拐彎方便，穿管容易；②銅芯抗疲勞、反復(fù)折彎不易斷裂，所以接線方便；③銅芯的機(jī)械強(qiáng)度高，能承受較大的機(jī)械拉力，給施工敷設(shè)帶來很大便利，也為機(jī)械化施工創(chuàng)造了條件。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="河南消防電線電纜招代理" src="http://tyunfile.71360.com/UpLoadFile/2019/11/29/11/637106243896683443_jsdianlan_4244218.jpg"></div></p><br /><p>文章來源地址: http://m.cdcfah.com/cp/132127.html</p></div></div></div></div></div><div id="37lnkcj" class="page-right twoColRt"><div id="icz38qh" class="box01 margin10 clearfix"><h3><a href="http://m.cdcfah.com/cp/">猜你喜歡</a></h3><div id="8mnuwd8" class="recomPic likePro"><a 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