This series of low-cost aluminum power cables includes three specifications: 50mm², 70mm², and 145mm². It uses cross-linked polyethylene (XLPE) as the insulating material and aluminum as the conductor core. While ensuring power transmission performance, it significantly reduces material costs, making it suitable for medium and high-voltage power transmission and large-scale wiring scenarios such as industrial and municipal applications.​ The conductor part is made of high-purity aluminum material through optimized processing technology, with good electrical conductivity. Although the conductivity of aluminum is slightly lower than that of copper, its cost-performance advantage is particularly prominent in large-section cables. The wire diameter designs of 50mm², 70mm², and 145mm² correspond to different current-carrying capacity requirements: the 50mm² cable has a continuous current-carrying capacity of about 150A, suitable for branch power supply in industrial parks; the 70mm² has a current-carrying capacity of about 185A, which can meet the outgoing circuits of small and medium-sized substations; the 145mm² has a current-carrying capacity of more than 300A, capable of undertaking the main lines of urban distribution networks or power connections of large industrial equipment. The multi-strand stranded aluminum conductor structure enhances the flexibility of the cable, facilitating long-distance transportation and laying in complex environments.​ The insulation layer is made of XLPE material, which has better temperature resistance, aging resistance, and electrical performance compared with traditional polyvinyl chloride (PVC) insulation. Its long-term operating temperature can reach 90℃, and the withstand temperature during short circuits is as high as 250℃, enabling stable operation in harsh environments such as high temperature, humidity, and dust. The XLPE insulation layer has low dielectric loss and high insulation resistance, which can effectively reduce energy loss during power transmission and improve power supply efficiency. At the same time, this material has strong chemical stability and excellent corrosion resistance, which can resist acid and alkali substances in the soil and oxidation in the air, extending the service life of the cable.​ The rated voltage of the product covers medium and high voltage levels such as 10kV and 35kV, in line with national power industry standards and international general specifications. It has passed strict voltage withstand tests, partial discharge tests, and aging tests to ensure operational safety in high-voltage environments. The three specifications of cables all use steel tape armoring or polyethylene sheathing as the outer protection, with good mechanical strength, which can withstand stretching, extrusion, and impact during laying, and also play a role in moisture-proof, rat and ant-proof.​ In terms of application scenarios, 50mm² and 70mm² cables are often used in urban distribution network transformation, internal transmission lines of industrial parks, and distribution trunks of large buildings; 145mm² cables are applicable to connection lines from power plants to substations, long-distance transmission projects, and collector lines of new energy projects (such as wind power and photovoltaic power stations). The low-cost feature makes it highly competitive in projects with limited budgets such as municipal engineering and rural power grid upgrading, while the high performance of XLPE insulation ensures the stability and reliability of power transmission.​ In the production process, the production cost is further controlled through large-scale procurement of aluminum materials and automated extrusion processes. Conductor stranding uses precision equipment to ensure uniform structure, the XLPE insulation layer achieves stable molecular structure through cross-linking technology, and the outer sheath undergoes strict thickness and tightness testing. Each batch of products must pass multiple index tests such as conductor resistance, insulation voltage withstand, and thermal extension to ensure quality compliance.​ To sum up, this series of low-cost aluminum power cables, with reasonable specification design, high-quality XLPE insulation materials, reliable performance, and economic cost, have become an ideal choice in the field of medium and high-voltage power transmission. They can not only meet the power needs of industrial production and urban construction but also reduce the initial investment and long-term operation and maintenance costs for users.