三、型号、名称、用途型号名称主要使用范围MHYV煤矿用聚乙烯绝缘聚氯乙烯护套通信电缆用于矿场作普通信号传输，适用于固定敷设MHYBV煤矿用聚乙烯绝缘镀锌钢丝编织铠装聚氯乙烯护套通信电缆用于机械冲击较高的场合作主信号传输MHYVP煤矿用聚乙烯绝缘编织屏蔽聚氯乙烯护套通信电缆用于电场干扰。
四、型号、名称、工作条件型号名称 工 作条 件 DJYPV 聚乙烯绝缘对绞铜线编织分屏蔽聚氯乙烯护 套计算机电缆 敷设室内、电缆沟、管道等要求静电屏蔽 场合 DJYVP 聚乙烯绝缘对绞铜线编织总屏蔽聚氯乙烯护 套计算机电缆 敷设室内、电缆沟、管道等要。
Fire retardant control cable model zr-kvvp22, zr-kvvvp2-22, zr-kvvvvp2, our company has been supplying for many years: 2. Zr-kvvp, zrc-kvvp, za-kvvp, zrb-kvvp, za-kvvrp, zc-kvvvrp, zrc-kvrp, zrc-kvrp, zrb-kvvvvvvvvp2, krkvp2-vrkp22 -KVVP32, etc. Control cables for mine flame retardant control cables: MKVV mkvvvvvvvvvvvvvvvvvv32 MKVVVRP: this product can be manufactured according to gb9330-88 electricity union IEC227(1979) and jcs258c-1986; The product is suitable for low voltage power supply, protection and measuring line of ac rated voltage 450/750v and 600/1000v and below. Especially suitable for power plants and substation control lines of 500KV or below. Use plastic insulation special shielding control cable can be external electricity, magnetic field.
This product use features: 1.1 the use of the cable temperature - 40 ℃ ~ + 60 ℃. 1.2 cable conductor long-term working temperature shall not exceed + 70 ℃. 1.3 cable laying temperature: polyvinyl chloride sheathed cable should not below 0 ℃; Polyethylene outer sheath cable should be not less than 20 ℃. 1.4 allowable bending radius of cables: non-armoured cables shall be no less than 10 times of the outer diameter of cables; The armored cable shall not be less than 15 times the outer diameter of the cable. 1.5 the shielding coefficient of comprehensive sheathed railway cable is less than 0.8; The shielding coefficient of aluminum sheath railway cable is less than 0.3
在交联聚乙烯绝缘高阻燃的基础上又开发了低烟无卤高阻燃隔氧层动力电缆，其低烟无卤性能符合国家标准GB/T17651.1.2和GB/T17650.1.2。
这样本公司的交联聚乙烯动力电缆的整体水平低于国内领先地位。
也许你会有疑问，为什么这么做？我也不知道，此款PLC就是这样，这就是它的套路，对于此种套路，我们只能牢记。
在其他PLC特别是日系，一般是通过设置参数的方式实现，也有使用指令的。
还有一点，黄色荧光笔部分的三个黑点，是表示电路相通，而它正是把转换好的地址赋值给下面我们要介绍的功能块。
也就是说，读写功能块读取或写入变量的从站地址就是使用变量A1_Add。
2、WRITE_VAR此功能块是用于往从站写数据，也就是写入变频器的运行频率。
Purpose and features: this product is suitable for transmission and communication in mine and underground monitoring. This product is flame retardant. Ii. Implementation: mt818.14-1999 fire retardant communication cable for coal mine and enterprise Q/ jg1710-2006. Iii. Usage features:? 1, cable long-term working temperature: - 30 ~ 60 ℃, cable laying temperature:????? Not below 0 ℃ 3, MHYV type bending radius is not less than 10 times of cable diameter. The bending radius of MHYBV is not less than 10 times of the cable diameter. The bending radius of MHYVP is not less than 10 times of cable diameter. The bending radius of MHY32 is not less than 15 times of the cable diameter.
HYAT23 armoured communication cable USES: armoured communication cable mechanical protective layer can be appended to the structure of the cable, with the mechanical strength of the cable, antierosion capability, is vulnerable to mechanical and vulnerable to erosion area and design of telephone cable. Any kind of laying can be adopted, which is more suitable for direct buried laying in rock area. Armored communication cable structure: 1. Basic cable: any filled and unfilled cable with single sheath or double sheath structure. 2. Armored communication cable mechanical protection layer: type 53 adopts 0.15mm thick corrugated steel belt, which is longitudinal wrapped on the basic cable and overlapped on both sides. The surface of the steel belt is coated with plastic to prevent corrosion and water intrusion. The type 23,22 has similar performance with double steel band wrapping. 3. Armored communication cable sheath: black high-molecular weight low-density polyurethane or polyurethane sheath. Sheath thickness may depend on the basic cable outer diameter.
2.电缆敷设安装允许弯曲半径：非铠装层电缆应不小于电缆外径的6倍；铠装或屏蔽层结构电缆应不小于电缆外径的12倍；屏蔽层结构的软电缆应不小于电缆外径的6倍。
电缆地线芯绝缘采用具有抗氧化性能的K型B类低密度聚乙烯。
一、阻燃本安安全系统用检测仪器电缆1、性能特性：a、电缆长期工作温度：70℃b、最低环境温度：－40℃c、电缆敷设温度：不低于0℃d、敷设时允许弯曲半径：不小于电缆外径6倍，铠装型电缆则应不小于电缆外径的12倍e、额定电压：300/500V2、电缆的型号、名称、适用范围：型号名称适用范围ZR-B。
二、型号、名称、适用范围普通型号阻燃型型号名称适用范围KVVP1ZR—KVVP1ZRB—KVVP1ZRA—KVVP1铜芯聚氯乙烯绝缘聚氯乙烯护套铜丝缠绕屏蔽控制电缆用于强电控制系统KVV22-1ZR-KVVP2-1ZRB-KVVP2ZRA-KVVP2铜芯聚氯乙烯绝缘聚氯乙烯护套钢带铠装铜丝屏蔽控制电。
例如：额定电压600/1000V交联聚乙烯绝缘聚稀烃护套阻燃B类低烟无卤电缆，3芯，240mm2，表示为WDZB-YJY600/1000V3*240Q/TEC16.额定电压600/1000V交联聚乙烯绝缘聚稀烃护套阻燃B类耐火低烟无卤电缆，3芯，240mm2，表示为WDZBN-YJY600/1000。
三相异步电动机的启动电路往往比较大，可能对电源或线路产生较大冲击。
对于一些大型异步电动机，启动时可采取星三角降压启动方式，启动时定子绕组接成Y接线方式启动，启动电流大大降低，当电动机速度接近额定转速时定子绕组转为△接线方式运行。
图所示为采用时间继电器自动控制Y—△电动机降压启动控制电路。
图示星三角降压启动控制电路由接触器、按钮、热继电器、时间继电器组成。
接触器KMy用于星形Y降压启动,接触器kM△用于三角形△全压运行,时间继电器KT用来控制Y形降压启动时间及完成Y一△切换。
铜芯聚乙稀绝缘聚氯乙稀护套铜丝编织屏蔽计算机电缆规格导体种类绝缘标称厚度mm编织单线直径mm外护套标称厚度mm电缆外径≤mm硬导体软导体1x2x0.7510.60.151.48.29．41x2x1.010.60.151.48.710．11x2x1.51。
RS485 cable product description: the characteristic impedance of 100 ohms, conductor is 2 * 2 * 24 awg multi-strand tin electrolytic copper wire twisted and become, insulating sheath like installation of design and color recognition, aluminum foil/polyester with total shielding, additional stranded tinned copper wire grounding conductor, industrial gray PVC outer sheath, 1 of the RS - 485 communication cable, the characteristic impedance of 120 ohms, conductor is 2 * 24 awg stranded tinned copper wire, PE insulation, covered with aluminum foil/polyester composite with + 90% tin plated copper wire this double shielding, comes with a grounding conductor is RS - 485 communication cable.
产品标准：YD/T产品型号：ZA-RVV（ZRRVVZRVVRRVVZ）通信电源用阻燃软电缆ZA-RVV22（ZRRVV22ZRVVR22RVVZ22）通信电源用阻燃钢带铠装软电缆本产品适用于架空、管道、室内电缆沟、地下直埋。
产品型号：TRVVSP中度柔性双绞屏蔽拖链电缆电缆结构：导体：超细精绞无氧铜丝符合VDE0295CLASS6标准绝缘：特殊混合PVC柔性绝缘线芯：两两绞合短节距成对,成对结构后分层集束,防扭结结构设计护层：(可选)无纺布总屏蔽：无氧铜丝编织屏蔽(70%以上密度)护套：丁腈柔性护套颜色：黑色(RAL9。