9、外护（适用于铠装电缆23、22、53型）：在铠装层上挤塑一层聚乙烯或聚氯乙烯。 计算机电缆1、计算机电缆执行标准：参照采用英国BS5308、日本JCS189。2、计算机控制电缆用途：本产品适用于额定电压450/750V及以下或直流1000V及以下的发电、冶金、石化等工矿企业集散系统、电子计算机系统、自动化系统的信号传输及检测仪器仪表等。
2交接箱内接线端子的排列，以25对为一基本单位，与市话电缆的基本单位一致，并在端子标有编号，便于施工检修。3接线模块的结构、排列及安装尺寸与3M公司产品完全一致，可以互相通用。4箱体经静电喷塑处理，美观大方，线条清晰、防腐防水性能好使用寿命长。
另外我厂最新研制开发出自承式组合电缆在SYV75-5+RVV+RVVP电缆基础上，电缆另加一根自承式钢丝，使电缆拉力大大增强。主要技术性能：1）额定电压:交流50Hz,500V。2）试验电压:交流50Hz,2000V。
WDZA-RYY铜芯阻燃无卤低烟聚烯烃绝缘低烟无卤聚烯烃护套软电缆。WDZA-RYY23铜芯阻燃无卤低烟聚烯烃绝缘钢带铠装低烟无卤聚烯烃护套软电缆。WDNA-RY铜芯耐火无卤低烟聚烯烃绝缘软电缆。
产品标准：GB使用条件：电缆导休的长期允许工作温度为70℃；无铠装层的屏蔽电缆，应不小于电缆外径的6倍；有铠装或铜带屏蔽结构的屏蔽电缆，应不小于电缆外径的12倍；有屏蔽层结构的软屏蔽电缆，应小于电缆外径6倍。
上图中KMKMKM3为Y/△转换的三个交流接触器。kM1为主交流接触器，无论是Y形正常运转，它都担负传递电能的工作，必须吸合动作。kM2交流接触器在电路中只是作为Y形的O点，电机正常运行时KM2它是不动作的。KM3交流接触器是电路Y形启动后来与KM1一起吸合共同完成工作任务，形成正常的△形运转的电流通路。电机Y形降压启动时KM1吸合，KM2动作将电动机接成Y形。一般Y型启动都采用上图中的380或220V（根据动力线的情况来定，220v需有工作零线N，无零线N必须用380v继电器）的得电延时继电器。
ZR-VV32ZR-VLV32ZR-VV33ZR-VLV33ZR-VV42ZR-VLV42ZR-VV43ZR-VLV43阻燃聚氯乙烯绝缘阻燃聚氯乙烯/聚乙烯护套钢丝铠装动力电缆敷设在高落差地区，电缆能承受机械外力作用及相当的拉力。
Tianjin Siemens: bus cable; Profibus DP cable.2 core purple cable, aluminum foil and metal wire braided double-layer shielding, solid bare copper conductor, 2 core in pairs, red and green core wire, green PVC outer sheath, purple appearance. Profibus DP cable adopts solid bare copper conductor as core wire, thickened aluminum foil and encrypted bare metal wire braided layer, good shielding effect, purple PVC outer sheath. Good transmission performance. ? 6xv1830-0eh10 L2 cable 2-core shielding (PROFIBUS bus bus bus cable) tianjin Siemens (original 6xv1830-0ah10 has been upgraded to 6xv1830-0eh10)? VDE 0472; Class B test (IEC332.1). With the rice logo, divided into 100 meters, 200 meters, 500 meters, 1000 meters wooden wheel packaging. Working parameters: single wire transmission large specification: 1000m, with repeater can reach 10000m
3、产品标准：GB9330.2-88《聚氯乙烯绝缘和护套控制电缆》4、电缆型号、名称及使用范围型号名称使用范围ZR-KVV阻燃聚氯乙烯绝缘，阻燃聚氯乙烯护套控制电缆敷设在室内、电缆沟中、管道内及地下。
Sheathed control cable products use feature: the cable conductor of long term working temperature should be allowed no more than 70 ℃. When the cable temperature under installation should not below 0 ℃, when laying bending radius should not less than 10 times of cable diameter. The cable with armor layer or copper band shielding structure shall not be less than 12 times the outer diameter of the cable.
RVV聚氯乙烯绝缘、聚氯乙烯护套仪表用软电缆用于要求柔软的场合。RVVP聚氯乙烯绝缘、聚氯乙烯护套仪表用屏蔽软电缆同RVV型，用于抗干扰场合。HYA：铜芯实心聚烯烃绝缘挡潮层聚乙烯护套市内通信电缆。
弯曲半径不低于电缆外径的15倍（敷设时），且适用于任何水平差的干扰信号工程专用电缆PTYA22PTY23PTY22PTYAH23PZYA23PZYA22PZY23PTYA23、PTYA22铁路工程专用信号电缆电缆芯数（芯）：4、6、8、9、12、14、16、19、21、24、28、30、33、37、。
为了标明各个按钮的作用，避免误操作，通常将按钮帽做成不同的颜色，以示区别，其颜色有红、绿、黑、黄、蓝、白等。如，红色表示停止按钮，绿色表示起动按钮等。按钮开关的主要参数、型式、安装孔尺寸、触头数量及触头的电流容量，在产品说明书中都有详细说明。按钮开关有很多种，接线的方式也不统一，会各种各析产情况发生。下面呢，是小编总结的几个经常遇到的按钮开关接线的问题，大家可以来学习，指正。带灯的按钮开关怎么接线，按钮上一共有五个接线柱，现在只能测出怎么接电源线，但是灯怎么亮不知怎么接。
我国国家标准GB12666.6（等同IEC331）将耐火试验分A、B两种级别，A级火焰温度950~1000℃，持续供火时间90min，B级火焰温度750~800℃，持续供火时间90min，整个试验期间，试样应承受产品规定的额定电压值。
Spin cassette XF5-273 communication cable transfer box, adopting advanced technology at home and abroad, in accordance with the international advanced standard production in the eighty s of cable wiring equipment, for the city, the town of telecommunication network backbone cable and wiring cable transfer. Features: 1. The connection jumper adopts rotary clamp-type connection and is sealed with silica gel on the metal clip, because it is not only reliable and durable, but also easy to operate and repair without stripping. 2. The wiring terminals in the handover box shall be arranged in 25 pairs as a basic unit, consistent with the basic units of the local telephone cables and marked with Numbers on the terminals to facilitate construction and maintenance. 3. The structure, arrangement and installation dimensions of the wiring modules are exactly the same as those of 3M products and can be used for each other. 4. The box body is treated by electrostatic spraying, beautiful and generous, with clear lines, good anti-corrosion and waterproof performance and long service life. Main technical parameters: the environment temperature: - 40 ℃ ~ + 65 ℃ atmospheric pressure: 70 ~ 106 kpa relative humidity: 95% or less is random ends and insulation resistance between terminals and ground > 5 x 104 Μ Ω. When connecting any two ends and any terminals and grounding to 1000V ac, there shall be no breakdown or flying arc in 1min. Contact resistance between wire and terminal < 5 x lO - 3 Ω.