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What is YJV cable? Introduction to YJV cable model and specification
Published:
2022-11-29 14:57
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电缆根据不同的分类标准有多种不同的型号规格，yjv电缆是其中的一种类型，那么yjv是什么电缆？yjv电缆型号规格有哪些呢？下面跟着小编一起来看看吧！
电缆我们大家都了解，电缆是电力系统中必需的材料之一，电缆通常被认为是由一根或多根相互绝缘的导体和外包绝缘保护层制成，将电力或信息从一处传输到另一处的导线。电缆根据不同的分类标准有多种不同的型号规格，yjv电缆
There are many different types and specifications of cables according to different classification standards. Yjv cable is one of them. What kind of cable is yjv? What are the models and specifications of the yjv cable? Let's follow Xiao Bian to have a look!
Cable We all know that cable is one of the necessary materials in the power system. Cable is usually considered to be a conductor made of one or more mutually insulated conductors and an external insulating protective layer, which transmits power or information from one place to another. There are many different types and specifications of cables according to different classification standards. Yjv cable
1、 What cable is yjv?
First of all, we will introduce what yjv means. yj refers to cross-linked polyethylene and v refers to polychloride. Then yjv is a cross-linked polyethylene insulated PVC sheathed cable, which is used for power transmission and distribution of power lines with a rated voltage of (U0/U) 0.6/1-26/35kv. The high rated temperature of the cable conductor is 90 ° C when it is used, and the high temperature of the cable conductor does not exceed 250 ° C when it is short circuited (the long duration does not exceed 5s). Moreover, it has the advantages of light weight and simple structure, so it is widely used in urban power grid.
2、 Model and specification of yjv cable
The core of yjv cable mainly includes single core, 2-core, 3-core, 4-core, 5-core, 3+1, 3+2, 4+1. 3+1 represents 3 phase lines+1 ground wire, 3+2 represents 3 phase lines+2 ground wire, and 4+1 represents 4 phase lines+1 ground wire.
Eliminate the standard models. The specific sizes and 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, and 300 square. For example, the yjv3 * 185+2 * 95 cable is composed of three 185 square phase lines and two 95 ground wires. Since the combination between the phase line and ground wire of the cable is specified in the standard, the 95 square behind the yjv3 * 185+2 * 95 cable can be omitted.
The main specifications of yjv cable vary from 1 square meter to 240 square meters (can also be customized separately). it is a cable used to transmit and distribute electric energy. It is commonly used in urban underground power grid, outgoing lines of power stations, internal power supply of industrial and mining enterprises, and underwater transmission lines crossing rivers and seas. In power lines, the proportion of cables is gradually increasing. Power cables are cable products used to transmit and distribute high-power electric energy in the main lines of the power system, including 1-500KV and above voltage levels, and various insulated power cables.
3、 Structure of yjv cable
Yjv cables are classified into core, conductor insulation layer, filler layer, shielding layer, steel tape armor, and sheath layer from the inside out.
Among them, the wire core of yjv is mainly copper core, and the application of aluminum core is less; The conductor insulation layer is PVC insulation; In order to fill the gap between the cores and protect the cores, the filling layer is mostly made of soft nylon materials; Generally, 15KV and above power cables have conductor shielding layer and insulation shielding layer; The steel strip armouring is a steel protective layer wrapped around the core to prevent the cable from being squeezed and deformed. The armored yjv cable is mostly used for burial; The sheath layer is a layer outside the yjv cable, which is made of polyethylene and plays the role of insulation and protection.
4、 Laying method of yjv cable
1. Yjv, yjlv copper (aluminum) core cross-linked polyethylene is laid indoors, in trenches and pipes, or in loose, insulated PVC sheathed power cable soil, and cannot withstand external forces. 2. Yjv22, yjlv22 copper (aluminum) core cross-linked polyethylene is laid underground, and can withstand external mechanical forces, but cannot withstand the large tensile force of vinyl insulated steel tape armored PVC sheathed power cables.
The above is the relevant knowledge of yjv cable introduced by Xiao Bian. yjv wires and cables are used to transmit electric (magnetic) energy, information and wire products to realize electromagnetic energy conversion. yjv cables are laid indoors, in trenches and pipes, or in loose soil, and cannot withstand external forces.
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