Yjv power cable

The name of YJV cable model is: XLPE insulated PVC sheathed power cable, YJ --- XLPE insulated, V --- PVC sheathed. The abbreviation (XPE) belongs to plastic cable, which has a hard texture, a temperature resistance grade of 90 ℃, and a high voltage grade from 1KV to 20KV. Suitable for fixed laying. It can be divided into high and low voltage: the general expression of the reference standard GB/T12706-208 is YJV-0.6/1KV YJV-10KV YC rubber sheathed cable, rubber type cable, with soft texture, temperature resistance grade of 70 ℃, voltage grade of 450/750V, suitable for mobile laying. Reference standard JB 8735-1988.    Cross-linked polyethylene insulated power cable has excellent thermal-mechanical performance, excellent electrical performance and chemical corrosion resistance. It also has the advantages of simple structure, light weight, and no drop limit. It is a novel cable widely used in urban power grids, mines and factories.    Insulation-crosslinked polyethylene (XLPE) of cables uses chemical and physical methods to convert linear molecular structure of polyethylene into three-dimensional network structure of cross-linked polyethylene, thus greatly improving the thermal mechanical properties of polyethylene and maintaining excellent electrical properties.    The maximum rated working temperature of XLPE insulated power cable conductor is 90 ℃, higher than that of PVC insulated and PE insulated cables, so the current carrying capacity of the cable is also further improved.

Core number and model 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 wires, and 4+1 represents 4 phase lines+1 ground wire.    According to the standard models, 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, and 300 square. For example, yjv3 * 185+2 * 95 cable is a cable 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 regulated by standards, 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, and can also be customized separately. It is a cable used to transmit and distribute electric energy. It is most commonly used in urban underground power grids, outgoing lines of power stations, internal power supply of industrial and mining enterprises, and underwater transmission lines across rivers and seas.

Structure of yjv cable

YJV cables are classified into core, conductor insulation layer, filler layer, shielding layer, steel strip armor and sheath layer from inside to outside.    Among them, the 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 mainly made of soft nylon materials; Generally, power cables of 15KV and above have conductor shielding layer and insulation shielding layer; Steel strip armor is a layer of steel protective layer wrapped around the wire core, which plays a role in preventing the cable from being extruded and deformed. Armored YJV cables are mostly used for underground burial; The sheath layer is the outer layer of yjv cable, which is made of polyethylene and plays the role of insulation and protection.

What to pay attention to during cable laying

1. Before selecting the cable, it is necessary to check the quality of the product to see whether it is qualified. Confirm its power supply, current and power. See if it meets the requirements of use. If overload occurs, it must not be used.    2. During the use of wires and cables, it is also necessary to pay attention to their temperature, and try to use them within the temperature that the product can withstand, and do not exceed this temperature, otherwise it is very easy to burn and cause trouble.    3. During the connection construction of cable cables, the cables should be separated from each other, and then the same lines should be connected together. Try not to connect them incorrectly. Otherwise, there will be hidden safety hazards, and it is dangerous to use them later.    4. When installing cables, we should also consider the specific conditions of the surrounding area, and then conduct wiring according to different conditions. Pay attention to the details in the construction and try not to have problems, so as not to affect the normal use and cause trouble for the later maintenance and use.

What should be paid attention to when purchasing cables

1. The quality of the cable determines the later use time and safety issues. Therefore, when purchasing, special attention should be paid to whether it has passed the national audit certification. At this time, you can ask the merchant to provide the certificate of commodity review, and there is a 3c mark on the outer package of the cable.    2. The packaging of cable is also a fine node. If the product is delivered by a large manufacturer, its packaging is naturally beautiful and has been carried out according to the standard. In addition, the address of the factory price, telephone number, production date, etc. will be clearly marked on the package, which will provide consumers with higher security.    3. Most manufacturers, in order to improve the quality of their own products, will control the cable at every step, so the appearance of the cable produced is smooth and round, and the color is very uniform. For products with poor quality, the outer surface is very rough and the gloss is not high.    4. The length of cable produced by large manufacturers has relevant regulations, which is generally 100m, and the resulting error should be controlled within 0.5m. In addition, the cable certificate should also be printed clearly, which will bring higher protection performance to consumers.