YJV is what cable YJV cable model specification introduction

Cables As we all know, cables are one of the necessary materials in power systems. Cables are generally thought to be made of one or more insulated conductors and an outer insulation coating to transfer power or information from one location to another. a wire in one place. Cables come in many different models according to different classification standards. yjv cable is one of them, so what cable is yjv? What are the yjv cable model specifications? Let's take a look at it with Xiaobian!

First, what cable is yjv?

First, let us introduce what yjv means, yj means cross-linked polyethylene, v means polychlorinated, then yjv is XLPE insulated PVC sheathed cable, the range 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 used, short circuit (maximum duration does not exceed 5S), the maximum temperature of the cable conductor does not exceed 250 °C . Moreover, it has the advantages of light weight, simple structure, and the like, and thus is widely used in urban power grids.

Second, yjv cable model specifications

The core of yjv cable mainly has single core, 2 core, 3 core, 4 core, 5 core, 3+1, 3+2, 4+1. 3+1 represents 3 phase lines +1 and ground, 3 +2 represents 3 phase lines + 2 with ground, and 4+1 represents 4 phase lines +1 with ground.

The standard model is available. 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, the yjv3*185+2*95 cable is a cable consisting of three 185-square-phase lines and two 95-ground cables. Since the combination of the phase and ground of the cable is standard, yjv3*185 The 95 squares behind the +2*95 cable can be omitted.

The main specifications of yjv cables range from 1 square to 240 square meters (also available separately) and are a cable for transmitting and distributing electrical energy. It is most commonly used in urban underground power grids, power outlets for power stations, internal power supply for industrial and mining enterprises, and underwater power lines that cross the river and cross the sea. In power lines, the proportion of cables is gradually increasing. Power cables are cable products used to transmit and distribute high-power electrical energy in the main line of the power system, including various voltage levels of 1-500KV and above, and various insulated power cables.

Third, the structure of the yjv cable

The yjv cable is classified into a core, a conductor insulation layer, a filling layer, a shielding layer, a steel tape armor, and a sheath layer from the inside to the outside.

Among them, the core of yjv is mainly copper core, the application of aluminum core is less; the conductor insulation layer is PVC insulation; the filling layer serves to protect the gap between the cores and protect the core. The material is mostly soft nylon material; generally, the power cable of 15KV and above generally has a conductor shielding layer and an insulating shielding layer; the steel tape armor is a layer of steel protective layer covering the periphery of the wire core to prevent the cable. The effect of being squeezed and deformed, the armored yjv cable is mostly used for burying; the sheath layer is the outermost layer of the yjv cable, and the material is polyethylene, which plays the role of insulation and protection.

Fourth, yjv cable laying method

1, yjv, yjlv copper (aluminum) core cross-linked polyethylene is laid indoors, in the channel and pipe, can also be buried in the loose, insulated PVC sheathed power cable soil, can not withstand the external force 2, yjv22, Yjlv22 copper (aluminum) core cross-linked polyethylene is laid underground, can withstand the external force of mechanical, but can not withstand the large tensile force of the insulated steel strip armored PVC sheathed power cable.

The above is the knowledge of yjv cable introduced by Xiaobian for everyone. yjv wire and cable is used to transmit electric (magnetic) energy, information and wire products for electromagnetic energy conversion. yjv cable is laid indoors, in channels and pipes, also It can be buried in loose soil and cannot withstand external forces.