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What YJV Cable Is YJV Cable Specification
- Jun 25, 2018 -

Cables have a variety of different model specifications according to different classification standards. Yjv cable is one of the types. What cable is yjv? What are the yjv cable model specifications? Let's take a look with Xiaobian!


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What YJV cable is YJV cable specification

Cable As we all know, cables are one of the necessary materials in power systems. Cables are usually thought of as being made up of one or more insulated conductors and an outer insulating protective layer that transfers power or information from one place to another. One wire. Cables have a variety of different model specifications according to different classification standards. Yjv cable is one of the types. What cable is yjv? What are the yjv cable model specifications? Let's take a look with Xiaobian!


 


One, what cable is yjv?


First of all, what is the meaning of yjv, yj means crosslinked polyethylene, v means polychlorinated, then yjv is XLPE insulated PVC sheathed cable, the scope of use is for rated voltage (U0/U) 0.6 / 1---26/35kv power line transmission and distribution, the maximum rated temperature of the cable conductor is 90°C when in use, and the maximum temperature of the cable conductor does not exceed 250°C when the short circuit (maximum duration does not exceed 5S). . Moreover, it has the advantages of light weight, simple structure, and is therefore widely used in urban power grids.


 


Second, yjv cable model specifications


The cores of yjv cables are mainly single-core, 2-core, 3-core, 4-core, 5-core, 3+1, 3+2, and 4+1. 3+1 represents three phase lines + 1 ground line, 3 +2 represents 3 phase lines + 2 with ground, 4 + 1 represents 4 phase lines + 1 with ground.


Eradicate the standard model, the specific size models include: 1 square, 1.5 square, 2.5 square, 4 square, 6 square, 10 square, 16 square, 25 square, 35 square, 50 square, 70 square, 95 square, 120 square, 150 Square, 185 square, 240 square, 300 square. For example, yjv3*185+2*95 cable is a cable composed of three 185 square phase lines and two 95 ground lines. Because the combination between the phase line and ground line of the cable is regulated by standards, yjv3*185 The 95 square behind the +2*95 cable can be omitted without saying.


The main specifications of the yjv cable range from 1 square to 240 square feet (which can also be individually customized) and is a cable for transmission and distribution of electrical energy. It is most commonly used for underground power grids in cities, lead-out lines for power stations, internal power supply for industrial and mining enterprises, and underwater transmission lines across rivers and seas. In power lines, the proportion of cables is gradually increasing. The power cable is a cable product used to transmit and distribute high-power electrical energy in the main line of the power system, including various voltage levels of 1-500 KV and above, and various insulated power cables.


 


Third, the structure of yjv cable


The yjv cables are categorized as cores, conductor insulation layers, filler layers, shield layers, steel tape armor, and jacket layers from the inside out.


Among them, yjv core is mainly based on copper core, aluminum core application is less; conductor insulating layer is PVC insulation; filling layer in order to fill the gap between the core, while protecting the core role, The material is mostly soft nylon material; usually the power cable of 15KV and above has a conductor shielding layer and insulation shielding layer; steel tape armor is a layer of steel protective layer wrapped around the core of the line, to prevent cable The effect of being crushed and deformed, armored yjv cables are mostly used for grounding; the sheathing layer is the outermost layer of the yjv cable, and the material is polyethylene, which plays a role in insulation and protection.


 


Four, yjv cable laying method


1. yjv, yjlv copper (aluminum) core cross-linked polyethylene is laid indoors, in channels and pipes, but also buried in loose, insulated PVC sheathed power cable soil, can not withstand the external force 2, yjv22, Yjlv22 copper (aluminum) core cross-linked polyethylene laid in the ground, can withstand mechanical external force, but can not withstand the ene insulation steel tape armored PVC sheathed power cable larger pull