氟塑料绝缘聚氯乙烯护套控制电缆

氟塑料绝缘聚氯乙烯护套控制电缆丰要适用于交流额定电压450／750V及以下，电器仪表和自动化控制系统的信号传输线。产品符合Q／YSO1.3等标准。产品型号：KFV(铜芯氟塑料绝缘105℃阻燃聚氯乙烯护套控制电缆)、KFP1V(铜芯氟塑料绝缘105℃阻燃聚氯乙烯护套屏蔽控制电缆）、KFV22（铜芯氟塑料绝缘105℃阻燃聚氯乙烯护套钢带铠装控制电缆)。     

无卤低烟阻燃电缆及其应力开裂的探讨

本文对近年来广泛应用的无卤低烟阻燃电缆及其应力开裂的影响因素进行了较详细讨论。无卤低烟阻燃电缆的应力开裂影响因素主要与材料选用 ,工艺挤出有关 ,也与使用环境和储存条件不恰当有关。     

环保型多芯预制分支电缆的研制

介绍了无卤低烟、耐火阻燃、钢带铠装多芯预制分支电缆研发的全过程,涉及到企业标准的制定、产品结构和加工工艺的确定,详述了注塑设备的选型、关键工艺技术控制点的研究。     

不同阻燃级别的电缆在建筑工程中的应用

介绍了标注低烟无卤阻燃电缆时可能出现的问题并加以解释;倡导工程设计根据电缆的非金属含量选择对应的阻燃级别;阐述了北美阻燃电缆测试标准及金属铠装电缆应用情况;推荐了一种低成本高可靠性的低烟无卤阻燃电缆产品。     

无卤低烟阻燃电力电缆护套开裂问题的分析及处理

1问题的提出随着电缆材料技术的发展,绿色环保的无卤低烟阻燃聚烯烃材料日益受到重视。在美国和欧盟国家,环保型无卤低烟阻燃电力电缆已经成为主流产品。无卤低烟阻燃护套材料作为一种环保型材料,     

中低压电力电缆防水研究和应用

在国内电缆工程施工中,中低压电力电缆基本都采用直埋、穿管或电缆沟等地埋敷设方式。在施工过程中,经常发生电缆护套擦伤、刮破等现象。因此,在地下水位较高或常年多雨地区敷设的中低压电力电缆需采取防水措施。在推广抗水树交联聚乙烯绝缘电缆之前,建议中低压电力电缆可采用防水结构设计,包括挤包聚乙烯内护套作为防水隔离套、纵包铝塑复合带黏结聚乙烯内护套作为防水隔离套和皱纹铝护套作为防水隔离套等。防水结构可以在电缆的内衬层实现,不影响电缆的其他功能（如铠装、阻燃、无卤低烟、防鼠蚁等）。     

新型电缆的低烟无卤阻燃环保特性

发生火灾时,工程中使用的优质阻燃电缆可以减少火灾中人员的伤亡和经济的损失,因此设计师和业主都非常关注电缆的低烟无卤阻燃性能。介绍了电缆的种类,对新型铝合金铠装电缆的低烟无卤阻燃性能作了详细的阐述。经检测,该新型电缆已通过测试,值得推广。     

低烟无卤阻燃电缆及护套挤制工艺的探讨

本文介绍了在低烟无卤阻燃电缆的开发中,低烟无卤护套料的选用,以及护套挤制中应注意的几个问题,并给出了成品电缆的测试结果。     

大截面阻燃电缆使用时外护套开裂问题的分析

介绍了采用的优选阻燃耐火电缆、封堵电缆穿墙孔洞 ,对重点防火区域采用针对性特殊防火措施及火灾报警及来火系统等电缆防火阻燃措施 ,试验并比较了 3种电缆的燃烧性能 ;试验分析了大截面阻燃电缆护套在应力作用下的开裂问题 ,供电缆制造厂商参考     

阻燃氯丁橡胶电缆护套橡皮的研究

<正> 自从十多年前阻燃橡皮电缆问世,阻燃氯丁橡胶(CR)也就随之出现。它与阻燃氯磺化聚乙烯(CSM)护套一样,经历过高阻燃,阻燃低HCl,阻燃低烟,阻燃低毒等阶段。这几方面的工作,我所正在进行,这里报导的只是其中的一部分。由于七十年代后期无卤阻燃电缆的出现,人们对含卤电缆护套材料也进行了广泛     

耐油耐低温型低烟无卤阻燃电缆料的研究

通过采用高醋酸乙烯(VA)含量的乙烯-醋酸乙烯共聚物(EVA)和采用增塑剂增塑的方法对耐油耐低温的无卤阻燃电缆料进行了研究,可以在耐油与耐低温及机械性能上达到很好的平衡,并可满足GB/T 12528-2008标准对耐油耐低温无卤阻燃电缆料的要求.     

500 kV交流海底电缆金属护层冲击感应电压研究

属护层冲击感应电压是高电压、大长度海底电缆安全运行的重要控制条件。采用电磁暂态仿真软件PSCAD/EMTDC,建立了海底电缆金属护层冲击感应电压仿真模型,对电缆长度、侵入波波形、电缆结构参数等对护层冲击感应电压的影响进行了计算分析,并研究分析了金属护层与铠装层分段短接和采用半导电外护套两种方式对限制金属护层冲击感应电压的作用,研究表明：电缆长度、侵入波波形和电缆结构参数对金属护层冲击感应电压有较大的影响;金属护层冲击感应电压随着分段短接点的个数和外护套电导率的增加而减小。     

高性能低烟无卤阻燃聚乙烯电缆料的浅析

随着社会的不断进步,科技的不断发展,人们的环保意识日益增强,对用于电线电缆制造的低能耗、低污染材料的研究日益兴起.主要对低烟无卤阻燃电缆料作一些简要分析,并介绍了其优缺点,旨在对其研究和应用有所帮助.     

Prediction of return currents and losses in underwater single-core armoured AC cables with large spacings

Losses and currents are measured and predicted in single-core armoured cables of the type laid under water with large spacing and hence operating as independent coaxial cables. It is seen that with an assumed value of 300 for the relative permeability of armour wire, the use of simple equations for loss calculation yield total values of loss which compare well with the measured values for the sheath and armour on open-circuit. For return in the sheath and armour a relative permeability of 400 is used to comply with the IEC recommendations. For a typical AC underwater cable with current return in the sheath, armour and water, the sheath and armour return currents are predicted. For the conductor current returning completely in the sheath and armour the predicted and measured currents are in reasonable agreement.     

The control of intermetallics in Pb-Cu-Te cable sheathing alloys

Lead alloys are used extensively as sheathing materials for high voltage power cables, especially in long undersea installations. Excellent extrusion properties, high ductility, a low re-crystallization temperature, good fatigue properties, and creep resistance make these alloys ideal for this application. Other service requirements, such as grounding of the cable, conduction of the short circuit currents, and waterproofing of the plastic insulators, are also met by a lead sheath. However, the lead layer in the cable is often a limiting factor both during cable production and during its service phase. The production of several hundred miles of long, single-piece cables is limited by cracking that takes place in the lead sheath during cable extrusion. Cracking of the lead sheath due to repeated vibration, creep, and re-crystallization becomes a limiting factor during the service life of these cables. Large precipitates that appear in the cable sheath after several hours of extrusion seem to be responsible for the premature cracking. A detailed examination of the alloy composition and cable sheathing operation is required to understand the origin of these precipitates     

无卤低烟阻燃聚烯烃型预制分支电缆制造技术的探讨

对无卤低烟阻燃聚烯烃型预制分支电缆连接体注塑的绝缘材料应用、注塑工艺进行分析,并从设备改造、模具设计、材料开发等要点入手,探讨解决的途径。     

电缆聚乙烯绝缘或护套表面缺陷的成因及解决

电缆聚乙烯绝缘或护套挤出加工温度高,若冷却方式和冷却温度不当,易产生环境应力开裂或表面缺陷。本文对聚乙烯挤出过程中表面缺陷种类和产生原因进行了分析,并提出了解决的措施。     

依托市场不断开发新颖无卤阻燃电缆料

随着无卤阻燃电线电缆广泛应用各种场合,用户对无卤阻燃电缆料的性能和品种提出了更多、更新的要求,为了适应这种形势的需要,对热塑型和辐照交联型无卤阻燃聚烯烃电缆料进行多方面研究和开发,文中介绍了这方面的有关情况。     

High Frequency Attenuation in Transmission Class Solid Dielectric Cable

High frequency attenuation in shielded distribution cable is well understood; however, this cannot be said of transmission class solid dielectric cable, which has a more complicated structure, including additional semiconducting ldquobeddingrdquo layers and a moisture barrier in the form of metal tape or corrugated metallic sheath. These additional elements cause new sources of high frequency loss relative to solid dielectric distribution cable. We report measurements of high frequency loss for transmission class solid dielectric cable with a corrugated copper sheath and for cable with a metal tape moisture barrier and wire screen (concentric neutral). Analytic approximations have been developed for the various sources of high frequency loss in these cable structures, and the analytic approximations have been checked using finite element analysis. Good agreement has been achieved between the computed and measured loss.