YJV wire and cable

Description :

    YJV 3 * 25 copper core cross-linked polyethylene insulated polyvinyl chloride sheathed power cable is a widely used fixed laying cable in power systems. It is mainly used in transmission and distribution lines with rated voltage of 0.6/1kV and below to solve insulation protection and mechanical protection problems during power transmission. This cable is suitable for indoor, tunnel, pipeline and other dry or humid environments, and can withstand certain mechanical external forces, but it is not recommended to withstand huge tensile forces. Its core function is to safely and stably transmit electrical energy from the power source to the load end, and it is an indispensable basic material in building electrical and industrial distribution networks. Typical working conditions include high-rise building main lines, factory workshop power supply, and urban power grid renovation projects.

    The structural design of YJV 3 * 25 copper core cross-linked polyethylene insulated polyvinyl chloride sheathed power cable strictly follows the national standard GB/T 12706.1-2020. The conductor is made of high-purity oxygen free copper wire twisted together to ensure good conductivity and flexibility; The insulation layer is made of cross-linked polyethylene (XLPE) material, which has excellent heat resistance, aging resistance, and electrical insulation strength. The long-term allowable working temperature can reach 90 ℃; The protective layer is made of polyvinyl chloride (PVC), providing wear-resistant, corrosion-resistant, and flame-retardant protection. The outer diameter of the cable is about 20-22mm, and the reference weight is about 1.2kg/m. The implementation standards include GB/T 12706, IEC 60502, etc., which have passed CCC certification and type testing to ensure that the structure can remain intact under short-circuit thermal stability conditions and meet the safety operation requirements in various harsh environments.

    When selecting YJV 3 * 25 copper core cross-linked polyethylene insulated polyvinyl chloride sheathed power cables, it is necessary to clarify the differences between YJV and VV cables: YJV uses cross-linked polyethylene insulation, which has a higher temperature resistance level (90 ℃ vs 70 ℃), a larger current carrying capacity, a longer service life, and is suitable for places with high safety requirements; VV cables have lower costs and are suitable for general temporary electricity or low load scenarios. This model is suitable for fixed installation and is not suitable for frequent movement or situations where the bending radius is too small. If the ambient temperature exceeds 40 ℃ or there is chemical corrosion, it is necessary to consider using high-temperature resistant or anti-corrosion special cables. For places that require flame retardant requirements, derivative models such as ZR-YJV or NH-YJV should be selected. When purchasing, it is necessary to verify the direct current resistance, insulation thickness, and sheath performance indicators of the conductor to ensure compliance with the design specifications.

    When installing YJV 3 * 25 copper core cross-linked polyethylene insulated polyvinyl chloride sheathed power cables, it should be noted that the minimum bending radius should not be less than 15 times the outer diameter of the cable to avoid damaging the insulation layer. The laying temperature should not be lower than 0 ℃, otherwise preheating treatment is required. The production of cable terminals and intermediate joints should be operated by professionals to ensure good sealing and prevent moisture from entering and causing insulation degradation. In daily maintenance, regularly check the surface of the cable for damage and aging, and monitor whether the operating temperature rises abnormally. Common faults include insulation breakdown, conductor overheating, etc., which are often caused by overload, poor contact, or external mechanical damage. It is recommended to conduct an insulation resistance test every six months and replace any potential hazards in a timely manner to ensure the continuous and stable operation of the power system and extend the service life of cables.

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