YJY stands for cross-linked polyethylene insulated and sheathed power cable. It can be laid indoors, in tunnels and ducts, or buried in loose soil, but it cannot withstand tension or pressure. YJ indicates that cross-linked polyethylene is used for insulation, meaning the polyethylene is cross-linked physically or chemically. This significantly improves its breakdown voltage and heat resistance, while maintaining the inherent advantages of polyethylene. The second "y" indicates that the sheath is made of polyethylene.
The price of cross-linked polyethylene is higher than that of polyvinyl chloride (PVC), resulting in the higher cost of YJY. The operating temperature of cross-linked polyethylene should not exceed 90°C, while that of polyvinyl chloride should not exceed 70°C.
Differences between YJY and YJV Power Cables
V - PVC-sheathed YJV cable model name: YJV. XLPE-insulated power cables offer excellent thermomechanical properties, electrical properties, and chemical corrosion resistance. They also feature a simple structure, light weight, and reliable installation. They are currently widely used in urban power grids and factories.
Cross-linked polyethylene (XLPE) cable insulation utilizes chemical and physical methods to transform polyethylene's linear molecular structure into a three-dimensional network structure, significantly improving its thermomechanical properties while maintaining excellent electrical performance.
XLPE insulated power cable conductors are rated for an operating temperature of 90°C, higher than those of PVC- and polyethylene-insulated cables, further enhancing the cable's current-carrying capacity.
