Power cables are used to transmit and distribute electric energy. They are often used in urban underground power grids, outgoing lines of power stations, internal power supply of industrial and mining enterprises, and underwater transmission lines crossing rivers. 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 trunk lines of the power system, including 1-500KV and above voltage levels, and various insulated power cables. PVC insulated power cables have good electrical properties and chemical stability. It is simple in structure and convenient in use, and is suitable for fixed laying on transmission and distribution lines with AC 50Hz and rated voltage of 0.6/1kV and below. The five core power cable is used to separate the neutral line and zero line in the low-voltage distribution system project to adapt to the development and safety performance needs of the distribution system, so as to make the system more stable and ensure the safety of staff. Applicable scope of this product: it is laid indoors, in tunnels, in pipelines and underground. The cable can withstand external mechanical forces, but not large tension. Single core cables are not allowed to be laid in pipes made of magnetic materials.Product features: Cross linked polyethylene insulated power cables have excellent thermal mechanical properties, excellent electrical and chemical corrosion resistance, simple structure, light weight, and no drop limit for laying. The cable insulation adopts cross-linked polyethylene, which is a chemical method to convert linear molecular polyethylene into cross-linked polyethylene with three-dimensional network structure, thereby greatly improving the mechanical properties of polyethylene and maintaining excellent electrical properties. Product advantages: 1. Small land occupation Generally, it is buried in the soil or laid indoors, in ditches and tunnels. The insulation distance between lines is small, without poles and towers. It occupies less land and basically does not occupy space on the ground 2. High reliability, less affected by climatic conditions and surrounding environment, stable transmission performance and high reliability 3. It has more favorable conditions for the development of ultra-high voltage and large capacity, such as low temperature and superconducting power cables 4. Large distributed capacitance 5. Less maintenance work 6. The possibility of electric shock is low Product structure: The inner and outer components are conductor, insulation layer, filling layer, (steel strip layer) and sheath layer. Nowadays, the most commonly used conductor material on the market is certainly copper conductor; The insulating layer and outer sheath are made of PVC, namely PVC plastic; The filling layer is generally made of some soft nylon materials to prevent direct contact and extrusion between conductors inside the cable; VV cable with steel tape armouring is VV22 cable. The role of steel tape armouring is compression resistance and can be used for burial. Use properties: 1. The long-term allowable working temperature of cable conductor is more than 70 ℃. 2. In case of short circuit (the longest duration shall not exceed 5 seconds), the maximum temperature of cable conductor shall not exceed 165 ℃. 3. The cable is not limited by the laying drop, and the ambient temperature during cable laying is not lower than 0 ℃. 4. Good chemical stability, acid, alkali, salt, oil and organic solvent resistance, and flame resistance. 5. Light weight, good bending performance, simple and convenient installation and maintenance.