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target="_blank">电气百科</a> >> <span>正文</span></div> <!-- main_content begin--> <div class="maincontent"> <!-- left begin --> <div class="news_left"> <div class="brand_news_details"> <h1>电气百科:避免西安电缆事件重演,告诉您十二种识别劣质电线电缆的技?/h1><table style="border-bottom:1px dotted #e4e4e4;" align="center"><tr><td><div class="news_mes">文章来源:青岛华强电缆有限公?作者:??点击?span id="HitNum"></span>?时间?span id="dTime">2021/2/5 11:04:25</span><input type="hidden" id="ID" value="100923627"/><input type="hidden" id="TypeID" value="2"/></div> </td> <td><div id="ckepop"></div></td></tr></table><div id="Content" style="display:none;">[电气百科:避免西安电缆事件重演,告诉您十二种识别劣质电线电缆的技巧]:电线线缆是电力传输的主要载体,同时在项目中使用量巨大,如果误选了劣质电缆,会造成电阻过大发热,引起电器火灾的危险,今天青岛华强电缆小编带大家一起看看,如何分别优劣电缆,杜绝安全事故的发生。电线电缆是?..</div><div class="brand_news_con"><p style="text-indent:2em;"> 电线线缆是电力传输的主要载体,同时在项目中使用量巨大,如果误选了劣质电缆,会造成电阻过大发热,引起电器火灾的危险,今天青岛华强电缆小编带大家一起看看,如何分别优劣电缆,杜绝安全事故的发生?</p> <p style="text-indent:2em;"> <span>电线电缆是电力传输的主要载体,其使用范围极为广泛,尤其在“城网、农网”改造和新建项目上使用量非常大?/span> </p> <p style="text-indent:2em;"> <span>近来,从全国各地质监部门的抽检结果来看,其质量问题仍较为突出,2010年,广东省电力局在工地对全省供货8个厂家抽查交联电力电缆,其中6个厂家不合格,仅?个厂家合格;佛山技术监督局最近在市场抽查66个样,其?3家不合格,合格的只有3家;2007年北京奥运工程联合北京电力局抽查所供电缆质量,不合格产品牵涉到?0多家电缆生产制造企业?/span> </p> <p style="text-indent:2em;"> <span>为此,小编就市场上需求比较大的几种电线和电缆,对一些劣质产品做以下分析和识别?/span> </p> <p style="text-indent:2em;"> <span>一般来说,在对市场上销售或使用的绝缘电线辨别真伪时主要是看其产品或包装上的标签、标识和有无3C标志,然而用户实际购买时的情况来看,很多绝缘电线即使质量有问题其产品或包装上也有3C标志,因此一时难辨真伪,在这样的情况下,你也不能轻易相信。据介绍,劣质电线有很大的危害。首先是安全性能低下。有许多电线的绝缘层不是采用正规绝缘塑料所制,而是用回收塑料制成,轻轻一剥就能将绝缘层剥开,这样极易造成绝缘层被电流击穿漏电,对使用者的生命安全造成极大威胁。其次是导电内导体的粗细决定了电线对电流的负载量,电流越大,要求导电内芯越粗。在检查中发现,许多电线的线芯实际截面大小远远小于其所标明的大小。如不少电线号称线芯截面?平方毫米,测量下来却仅有2.5平方毫米,有的甚至只?.5平方毫米。当消费者使用这种产品时,会造成电阻过大发热,引起电器火灾的危险?/span> </p> <p style="text-indent:2em;"> <span>识别劣质绝缘电线有以下几种技巧:</span> </p> <p style="text-indent:2em;"> <span>普通电?/span> </p> <p style="text-indent:2em;"> <span>(一)看标签和绝缘外皮上的印刷字样,如果有错别字或印刷深浅不一、字样模糊,要引起注意?/span> </p> <p style="text-indent:2em;"> (二)用手指搓揉绝缘外皮,有些劣质绝缘电线外皮容易掉色,特别是红色线更会出现这种问题,经搓揉后手指上留下线皮颜色或印在线皮上的字被擦掉的一般是劣质线?</p> <p style="text-indent:2em;"> <span>(三)用指甲划、掐绝缘外皮,能划下、掐下来一块的一般是劣质线?/span> </p> <p style="text-indent:2em;"> <span>(四)反复弯折绝缘电线,劣质线绝缘层一般材质很差,弯折3~4次后其绝缘层就会断裂?/span> </p> <p style="text-indent:2em;"> <span>(五)点燃绝缘层,离开明火后能自燃的是劣质线?/span> </p> <p style="text-indent:2em;"> <span>(六)看线芯颜色,劣质线颜色灰暗且无金属光泽?/span> </p> <p style="text-indent:2em;"> <span>(七)包装长度上,一般每扎或圈为100米,国家规定允许误差是?.5%,劣质电线长度只?5米,甚至更少;有些在包装上,以“码”为单位来误导?/span> </p> <p style="text-indent:2em;"> <span>(八)如果通过以上7种方法还不能确定,还可以测量绝缘电线外径和线芯直径,实测数值相差较大,基本上就是劣质绝缘电线(注意:目前有很多不良厂家,导体不够截面,加大绝缘或护套厚度以达到整个电线外径用以欺骗用户)?/span> </p> <p style="text-indent:2em;"> <span>无卤低烟类环保电?/span> </p> <p style="text-indent:2em;"> <span>目前国内技术或者说原材料问题,只有采用辐照工艺技术才能保证无卤低烟阻燃电线的绝缘能力不受高温、潮湿环境的破坏,而非辐照交联的无卤低烟阻燃电线,即使做过温水试验,在设计工程应用中也出现问题?005年南京某民用工程使用的非辐照交联的无卤低烟阻燃电线在潮湿环境下敷设后,多条线路出现绝缘强度不够的故障,只能全部更换,国内已有多家设计院(如北京建筑研究院的奥运项目、北京西客站地下商场、广东科学中心主楼等)规定工程中不得采用非辐照交联的无卤低烟阻燃电缆。因为非辐照交联的无卤低烟阻燃电线特别容易吸水(热塑性的无卤低烟材料采用大量的AL(OH?或者Mg(OH?),根据国家电线电缆检测中心实验表明:非辐照交联的无卤低烟阻燃电线在经过温水实验后,绝缘电阻下?00~1000倍?/span> </p> <p style="text-indent:2em;"> <span>故识别该类电线,很简单,就是看生产企业是否具备辐照交联电缆生产线?/span> </p> <p style="text-indent:2em;"> <span>火类电线</span> </p> <p style="text-indent:2em;"> <span>识别劣质该类电线,在普通电线基础上,应对云母带加以识别?/span> </p> <p style="text-indent:2em;"> <span>(一)一般采?层云母带绕包,且重叠率在50%左右?/span> </p> <p style="text-indent:2em;"> <span>(二)云母带的质量也很关键,用手轻轻搓揉,如有粉状物,说明为劣质?/span> </p> <p style="text-indent:2em;"> <span>(三)用火焰烧云母,如火焰透过云母带,就为劣质耐火电线?/span> </p> <p style="text-indent:2em;"> <span>电工小知?/span> </p> <p style="text-indent:2em;"> <span>功率P=I2×R 式中:I—电流;R—导体电?/span> </p> <p style="text-indent:2em;"> <span>而R与导体的截面S成反比,也就是说:劣质电线在导体截面上偷工减料,不但会引起电线导体过热、绝缘老化,从而造成电器火灾的危险,而且损耗电能。比如截面只?0%,那么比标准截面的导体要多?0%的电能?/span> </p> <p style="text-indent:2em;"> <span>总之,如采用劣质电线,就会产生:1、绝缘易击穿或过早老化,产生漏电;2、电线发热厉害;3、电能消耗大?、极易引发火灾,造成人畜伤亡等?/span> </p> <p style="text-align:center;text-indent:2em;"> <span><img src="http://oss.cnelc.com/kindeditor/img/20210205/20210205110340_5045.png" alt="" width="600" height="431" title="" align="" /><br /> </span> </p></div><div class="meneame"><span class="disabled">< </span><span class="current">1</span> <span class="disabled">> </span></div> <div style="text-align: center;padding-top: 10px;"><img src="/images/code.jpg" alt="关注有惊?" /></div> <div class="news_bot_mes">中国工业电器网:此内容转载于合作媒体或互联网其它网站,中国工业电器网登载此文出于传递更多信息之目的,并不意味着赞同其观点或证实其描述!</br>新闻、技术文章投稿QQ?28246603 邮箱:news@cnelc.com</div> <h2 class="related">相关阅读</h2> <ul class="related_con"> <li>· <a href="/text/32/210205/AD100923627_1.html" target="_blank">电气百科:避免西安电缆事件重演,告诉您十</a></li><li>· <a 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