1X2X1.0格石林销售施工一体化PTYA234X1.0铁路信号线缆简洁
White - 1 standard 568 b: orange, orange - 2, green and white - 3, blue - 4-5 of white and blue, and green - 6, brown and white - 7, brown - 8
接地线选用黄绿双色线，接开关线选用红、黄、蓝、绿、黑等任一种。2000年后，电路设计一般是：进户线6—10mm2，照明2.5mm2，插座4mm2，空调6mm2专线。单芯电线1.5平方电线，用于灯具照明，单芯电线2.5平方电线，用于插座。
1.4电缆的允许弯曲半径：非铠装电缆应不小于电缆外径的10倍；铠装电缆应不小于电缆外径的15倍。RS232/RS-485通讯电缆信号线适用于EIARS-232/422通讯网络，是楼宇自控、工业控制网络、电力自动化等通讯网络的常用电缆型号。
Flame retardant cables and fireproof cables: the difference between the average person is very easy to confuse the concept of flame retardant cables and fireproof cables, although there are many more flame retardant cable applies to the advantages of chemical enterprise, such as low, low smoke, non-halogen, but in general, fire-resistant cable can replace flame retardant cable, and flame retardant cables can't take place of fire-resistant cable.
Power cables have many advantages and occupy less land. Generally, it is buried in soil or laid in indoor, ditch and tunnel. The insulation distance between lines is small. High reliability. It is less affected by climatic conditions and surrounding environment, stable transmission performance and high reliability. It has more favorable conditions for the development of ultra-high voltage and large capacity, such as low temperature, superconducting power cable, etc. The distributed capacitance is large. Less maintenance. It's less likely to shock.
为了大家有一个好的学习方法，能在最快最短的时间内学会掌握plc的应用，特此为初学PLC的同学编写了一份学习PLC的流程和方法，教大家如何学习PLC，希望对大家有所帮助，这是某个学员学习时候的一些学习方法及感悟，特此分享给大家。当然，这只是我自己的观点，大家如有什么好的建议，也希望同学们能向我积极提出来，我们共同讨论学习和进步。第一：掌握西门子硬件的结构及各部分的一个功能，熟悉PLC的硬件接线，：开关量输入输出的接线，模拟量输入输出的接线。
矿用通信电缆种类繁多，有煤矿用聚乙烯绝缘聚氯乙烯护套通信软电缆型号为MHYVR规格为(2、3、4、5、7、10)×2、1×（2、3、4、5、6、7）执行标准：MT煤矿用聚乙烯绝缘聚氯乙烯护套通信电缆MHYV规格：1×2、2×2、1×4、5×2执行标准：MT818.煤矿用聚乙烯绝缘镀锌钢丝编织铠装聚氯。
控制电缆包括kvv电缆，kvvr电缆，zrkvv电缆，zrkvvp电缆，kvvp电缆，kvvrp电缆，kvvp2电缆，kvvp2－22电缆，nhkvv电缆，zrkvvrp电缆，kvv22电缆，zrkvv22电缆。
The technical standard of railway signal cable product is as follows: horizontal TB/ t2476-1993 railway signal cable
公司与各大城市上海，北京，深圳，广东，江苏，浙江，山东，四川，福建，湖北，河南，辽宁，河北，陕西，湖南，安徽，天津，重庆，广西，黑龙江，江西，山西，吉林，云南，新疆，内蒙古，甘肃，贵州，台湾等各大城市有着长期的业务来往，价格公道，进口/国产的各种品牌各种型号的齐全，强大的售后服务，让其天联电缆亮遍全。
Our company guarantees that the products can operate reliably and safely under the correct installation, normal operation and maintenance.
煤矿用控制电缆 MKVVMKVV22MKVV32MKVVRMKVVRP MKVVP煤矿用控制电缆产品执行标准：MT煤矿用控制电缆用途：本产品适用于交流额定电压u0/u为450/750V及以下的控制监控回路及保护线路和配电装置中电器仪表的连接线。
改变频率可以方便地改变电机的运行速度，也即变频对于交流电机的调速是十分合适的。变频器的工作原理与变频器的工作方式有关。通用变频器按工作方式分类如下：U/f控制。U/f控制即电压与频率成比例变化控制，又称恒压频比控制。由于通用变频器的负载主要是电动机，出于电机磁场恒定的考虑，在变频的同时都要伴随着电压的调节。U/f控制忽略了电机漏阻抗的作用，在低频段的工作特性不理想。因此实际变频器中常采用E/f(恒电动势频比)控制。
High insulation resistance, good voltage resistance, low dielectric coefficient and low dielectric loss temperature and variation of the medium can not only meet the requirement of transmission performance, but also ensure the service life of the cable.
填充式铠装通信电缆型号HYAT53WDZ-HYAT53ZRC-HYAT53。铠装通信电缆型号HYA22HYV22HYAT22HYY23HYYT23HYA23HYAT23。钢丝铠装通信电缆HYA33HYAT33WDZ-HYA53HYY33HYYT33HYY33。
自承式电缆结构：导线：退火裸铜线，铜线直径为0.32，0.4，0.5，0.6，0.7，0.8，0.9mm。绝缘材料：高密度聚乙烯或乙/丙共聚物，绝缘现的颜色符合全色谱标准。绝缘线对：二根不同颜色的绝缘线按不同的节距扭绞成对，采用规定的HYAC-索道通信电缆-的详细介绍色谱组合以便识别。
Low smoke and low halogen flame retardant control cables are suitable for the use of ac rated voltage 450/750v and below control, monitoring circuit and protection line with certain environmental protection requirements. Operating conditions (1) rated voltage U0/U is 450/750v; (2) the cable conductor allowed to work at 70 ℃ for a long time; (3) the cable temperature under installation should not below 0 ℃, allowed bending radius; recommended by (4) the cable without armor layer shall be no less than 6 times the outer diameter of the cable; (5) the cable with armored or copper belt shielding structure shall be no less than 12 times the outer diameter of the cable; (6) the soft cable with shield layer structure shall be no less than 6 times of the cable. Technical requirements for 20 ℃ dc resistance conductors shall comply with the terms of GB9330.1 insulation resistance are shown in table 3 - table 6. The fire retardant performance test of the cable conforms to the provisions of GB/T18380. If the user does not require it to meet the requirements of class C fire retardant. The cable smoke concentration shall comply with the provisions of GB/T17651, and its light transmittance shall be 60%. The halogen content should not exceed 100 mg/g. Other performance requirements are the same as GB9330.