Identification and length marking: there are permanent identification marks on the cable surface, and the marking interval is not more than 1m.
IA-DJVVPRIA-DJYVPRIA-DJYJVPR本安型、编织总屏蔽（铜丝或镀锡丝）软结构。
IA-DJVVP2RIA-DJYVP2RIA-DJYJVP2R本安型、铜塑复合膜总屏蔽软结构。
IA-DJVVP3RIA-DJYVP3RIA-DJYJVP3R本安型、铝塑复合膜总屏蔽软结构。
特性阻抗为120Ω的双绞屏蔽电缆广泛用于RS485/422、CANBUS等总线，该系列电缆规格很多，请提供电缆的敷设环境、通信速率、最大无中继传输距离等参数，我们将依照具体情况推荐最适当的产品。
RVV：铜芯聚氯乙烯绝缘和护套软信号电缆RVVP：铜芯聚氯乙烯绝缘和护套编织屏蔽软信号电缆RVVP2：铜芯聚氯乙烯绝缘和护套铜带屏蔽软信号电缆RVVP3：铜芯聚氯乙烯绝缘和护套铝塑复合带屏蔽软信号电缆RVVP-22：铜芯聚氯乙烯绝缘和护套编织屏蔽钢带铠装软信号电缆RVVP2-22：铜芯聚氯乙烯绝缘和。
耐火电缆广泛应用于高层建筑、地下铁道、地下街、大型电站及重要的工矿企业等与防火安全和消防救生有关的地方，例如，消防设备及紧急向导灯等应急设施的供电线路和控制线路。
用途：耐火电缆广泛应用于高层建筑、地下铁道、地下街、大型电站及重要的工矿企业等与防火安全和消防救生有关的地方，例如，消防设备及紧急向导灯等应急设施的供电线路和控制线路。
以变压器接线方式Y/△11为例，讲解星转角（Y△）问题：1.1为了便于理解本文假设：变压器高低压侧额定电流均为1A；变压器平衡系数为1；从相量图我们可以看到两侧电流之间会出现30的相位差，那怎么干掉这30°的相位差呢？当然是要通过保护装置的软件算法对相位进行校正。
微机型保护装置有2种相位校正方式：三角形侧向星形侧校正（△Y）和星形侧向三角形侧校正（Y△）。
版权所有。
我国广泛采用的是星形侧向三角形侧校正（Y△）方式，本文也只讲解星形侧向三角形侧校正（Y△）这种方式。
KVV32聚氯乙烯绝缘，细钢丝铠装聚氯乙烯护套控制电缆敷设在室内、电缆沟中、管道、竖井内及地下，能承受一定的拉力作用。
PYYPTYY聚乙烯绝缘乙烯护套铁路信号电缆。
PYAPTYA聚乙烯绝缘挡潮综合护套（铁路）信号电缆。
二、执行标准MT/TQ/TY《煤矿用阻燃射频同轴电缆》。
适用于室内、管道及一般工业环境。
使用时，屏蔽层一端接地。
普通双绞屏蔽型电缆STP-120Ω（forRS485&CAN）onepair18AWG，电缆外径8.2mm左右。
MHY32煤矿用聚乙烯绝缘钢丝铠装聚氯乙烯护套通信电缆用于平巷、竖井或斜井作主信号传输。
KVVP型、ZR-KVVP型450/750V铜芯聚氯乙烯绝缘聚氯乙烯护套编织屏蔽控制电缆 。
KVVP2型、ZR-KVVP2型450/750V铜芯聚氯乙烯绝缘聚氯乙烯护套铜带屏蔽控制电缆 。
YQ,YQW轻型橡套软电缆用于轻型移动电器设备和工具YZ,YZW中型橡套软电缆用于各种移动电器设备和工具YC,YCW重型橡套软电缆用于各种移动电器设备，能承受较大的机械外力作用我橡塑电缆厂的野外用橡套电缆（YCW电缆，YZW电缆）是为适应野外用工矿企业调整发展的需要，生产性能优良的橡皮绝。
7、自承式电缆：采用8字形挤出模具，对自承钢索与铝塑纵包缆芯挤塑。
8、铠装（适用于铠装电缆23、22、53型）；在综合护层外绕包两层镀锌钢带（适用于23、22型电缆）或纵包一层涂塑钢带（适用于53型电缆）。
产品用途：敷设在室内、电缆沟、管道等要求耐高温静电屏蔽的场合。
6、最低安装敷设温度：序号1～4-45℃序号5～140℃。
HJVV、HJVVP、HPVV通信电缆用途：主要用于传输音频、150kHZ及以下的模拟信号2048kbit/s及以下的数字信号。
AC电源AC输入型PLC的输入接线AC电源AC输入型PLC的输入接线这种类型的PLC（基本单元和扩展单元）采用AC100～120V供电，该电压除了供给PLC的电源端子外，还要在外部提供给输入电路，在输入接线时将AC100120接在COM端子和开关之间，开关另一端接输入端子。
扩展模块的输人接线扩展模块的输入接线由于扩展模块内部没有电源电路，它只能由外部为输人电路提供DC24V电压，在输入接线时将DC24V正极接扩展模块的24＋端子，DC24V负极接开关，开关另一端接输人端子。
字母R代表软线字母V代表绝缘体聚氯乙烯（PVC）比如：RVV2*0.5就是2根0.5平方毫米的线外加一层外护套，护套的作用是：1、保护电缆内护层不受机械损伤和化学腐蚀；2、增强线缆机械强度。
RVV电缆主要用途：应用于电器、仪表和电子设备及自动化装置用电源线、控制线及信号传输线，具体可用于防盗报警系统、楼宇对讲系统等。
Precautions for installation of power cables: keep 2m distance when the cable is installed in parallel with the thermal pipe, and 0.5m should be maintained when crossing. The cable shall be installed at a distance of 0.5m in parallel or across other pipelines. When the cable is directly buried and installed, the direct buried depth of 1-35kv cable is less than 0.7m. When 10KV and below cables are installed in parallel, the net distance between them shall not be less than 0.1m and 10-35kv shall not be less than 0.25m. The distance of cross installation is not less than 0.5m. Cable laying temperature lower than 0 ℃, bending radius: multi-core cable or 15 (D + D), a single cable 20 or more (D + D), (D for cable diameter, D) for the conductor diameter. ? 6KV and above cable connector:? When installing the terminal head of the cable, the semiconductor electrical shielding layer must be stripped off. During operation, the insulation shall not be damaged. The shield end should be flat and the graphite layer (carbon particles) should be clean. (2) plastic cable end copper tape screened and armor must be good grounding, the short circuit also follow this principle, avoid unbalanced three-phase run ShiGang armoured end produce inductive electromotive force, and even "lighter" and sheath and other accidents. It is required to use my tinplate to braid copper wire for grounding lead. When connecting with the cable copper belt, it should be welded with chromium-iron tin. ? The shield of three-phase copper tape should be connected with ground wire respectively. Note that the shielded ground wire and steel armor ground wire should be separately drawn out and insulated from each other. The position of the welded ground wire should be as low as possible. Basic re for cable terminals and intermediate joints: a. good conductor connection; B. The insulation is reliable, and it is recommended to use irradiated cross-linked heat-shrinkable silicone rubber insulation materials; C. good sealing; D. sufficient mechanical strength to meet various operating conditions. The end of the cable must be used to prevent water and other corrosive materials from corroding, in order to prevent the water tree caused by the aging of the insulation layer and breakdown. Crane or forklift should be used for the loading and unloading of cables. It is forbidden to run flat or lay flat. For installation of large cables, cable laying cart should be used to avoid external damage or abrasion caused by manual dragging. If the cable cannot be laid in time for some reason, it should be stored in a dry place to prevent sunlight from exploding and water entering the end of the cable. ? Note: the installation of wire and cable should be familiar with the performance of wire and cable installation personnel or full-time technical personnel, if there are still unclear matters, ball related technical department or technical department of our factory.