XLPE/PVC insulated aluminum/copper core underground power cables are high-efficiency electrical energy transmission devices specially designed for underground laying scenarios. Covering three cross-sectional area specifications of 50mm², 70mm², and 150mm², they are widely used in urban distribution network transformation, industrial factory power transmission, residential community power distribution, and municipal engineering, providing reliable solutions for power transmission in complex underground environments.​ In terms of insulating materials, this series of cables is divided into two types: XLPE (cross-linked polyethylene) and PVC (polyvinyl chloride). XLPE insulation has excellent high-temperature resistance, aging resistance, and electrical insulation strength. It can work stably in high-temperature environments with low dielectric loss, making it suitable for medium and high-voltage scenarios or long-term high-load operation where high insulation performance is required. PVC insulation has good mechanical strength, chemical corrosion resistance, and economy. Its insulation performance meets the needs of low-voltage distribution systems, and it is often used in general industrial and civil low-voltage underground power transmission systems. The choice of the two insulating materials can be flexibly matched according to the voltage level, ambient temperature, and budget of specific projects to improve the adaptability of the cable.​ The conductor material provides two options: aluminum core and copper core. Copper core conductors have excellent conductivity, large current-carrying capacity, and strong oxidation resistance, making them suitable for scenarios with strict requirements on transmission efficiency and stability, such as large industrial plants and important municipal facilities. Aluminum core conductors are lightweight, low-cost, and rich in resources. Although their conductivity is slightly inferior to that of copper, they perform stably in low-voltage distribution and medium-short distance power transmission, which can effectively reduce the overall cost of the project. They are suitable for residential communities, ordinary municipal engineering, and other scenarios. The differentiated design of the two conductor materials not only meets the performance requirements of different scenarios but also takes into account economy and practicality.​ In terms of specifications, the three cross-sectional areas of 50mm², 70mm², and 150mm² cover different load requirements. 50mm² cables are suitable for power supply of small and medium-sized power equipment, such as branch distribution in residential communities and power transmission for small municipal facilities. 70mm² cables can meet the medium-load power transmission needs, often used in workshop distribution in industrial plants and branch lines of regional distribution networks. 150mm² cables have a large current-carrying capacity and are suitable for high-voltage or high-load scenarios such as main line transmission and total power distribution in large building complexes. The diverse cross-sectional area options can accurately match the power transmission capacity of different projects, avoiding resource waste or insufficient load.​ As underground special cables, their structural design fully considers the complexity of the underground environment. Both XLPE and PVC insulation layers can effectively resist acid-base corrosion in the soil, groundwater immersion, and mechanical extrusion. The outer sheath (usually PVC or steel tape armoring) further enhances the cable's impact resistance and ability to prevent damage from rodents, ensuring that insulation aging or conductor damage due to environmental factors is less likely to occur during long-term underground laying. In addition, the flexible design of the cable facilitates flexible construction in various laying methods such as underground pipes and direct burial, reducing the installation difficulty in complex terrains.​ Through the multiple combinations of insulating materials and conductor materials, gradient coverage of specifications, and special optimization for underground environments, this series of cables has become a comprehensive power transmission solution that balances performance, cost, and adaptability, providing a solid guarantee for the safe and efficient operation of various underground power projects.