The most widely used plastic cables in power cables are probably VV cables and YJV cables. Let's first understand their meanings: YJV power cable stands for copper-core cross-linked polyethylene insulated and PVC-sheathed power cable, while VV power cable stands for copper-core polyvinyl chloride insulated and PVC-sheathed power cable. YJV has a relatively high voltage level (kV) of 6-500kV and a maximum operating temperature of 90°C, while VV has a lower voltage level (kV) of 1-6kV and a maximum operating temperature of 65-70°C.
Which is better, YJV or VV cable?
1: In terms of materials, YJV power cable does not contain chlorine and does not produce large amounts of chlorine gas (chlorine is a toxic gas) when burned, while VV power cable is made of polyvinyl chloride. Therefore, cross-linked polyethylene insulation has stronger high-temperature resistance, better performance than ordinary polyvinyl chloride, longer service life, and is safer and more environmentally friendly.
2. Regarding voltage, conventional YJV power cables have a maximum operating temperature of 90°C, while VV power cables have a maximum operating temperature of approximately 70°C. Current carrying capacity is determined by the cable's maximum operating temperature, so YJV cables appear to have a higher current carrying capacity. Therefore, the manufacturing process requirements for YJV power cables are higher than those for VV power cables, resulting in YJV power cables having superior overall performance.
3. Manufacturing process: VV is a plastic cable, while YJV is a cross-linked cable. Its insulation performance is superior to that of plastic cables.
4. Cost: Because VV cables have a lower maximum operating temperature, they require lower manufacturing standards, making them more economical and affordable, making them more cost-effective for specific applications.
What are the differences between YJV and VV cables?
1. Manufacturing process: YJV cable uses cross-linked polyethylene insulation and a PVC sheath, a thermoset material; VV cable uses PVC insulation and a PVC sheath, a thermoplastic material.
2. Voltage differences: YJV—voltage levels (kV) 6-500, maximum allowable operating temperature 90°C; VV—voltage levels (kV) 1-6, maximum allowable operating temperature 65-70°C.
3. Materials and application environments: Because YJV power cables contain no chlorine, they are non-toxic when burned and are suitable for most locations. VV power cables, on the other hand, are made of PVC, which produces high fumes and is toxic when burned, making them suitable only for locations with limited environmental requirements.
After reading this, you should have a good understanding of YJV and VV cables. Based on the advantages, disadvantages, and differences listed above, it's clear that there's no absolute advantage or disadvantage between the two. Different options can be chosen for different locations and environments. Generally speaking, for areas with higher safety and environmental protection requirements, civilians will choose YJV cables, but because of its economical and low price, many industrial enterprises will also choose VV cables.
