High-Voltage Aluminum Cable Engineering Application Sharing, Adapted to Large-Scale Infrastructure Transmission Scenarios
As global power infrastructure enters a new cycle of development—spanning ultra-high-voltage (UHV) power grids, interregional power transmission, and traction power supply for rail transit—high-voltage aluminum cables are increasingly being deployed in the core transmission segments of major infrastructure projects. These cables, which utilize aluminum or aluminum alloys as conductors, encompass both underground power cables and overhead conductors designed for high-voltage (typically 10kV and above) applications. Underground aluminum power cables, in particular, are well-suited for scenarios where overhead lines are impractical, such as urban underground power transmission or power evacuation from generating plants.
Although the electrical conductivity of aluminum is approximately 60% that of copper, it should not be viewed merely as a "cheap substitute" for copper. With the acceleration of power grid upgrades, urbanization, and new energy projects in my country, there is an increasing demand for cable products that offer superior safety, cost-effectiveness, and durability. Against this backdrop, 8.7/15kV YJLV power cables—featuring cross-linked polyethylene (XLPE) insulation and a polyvinyl chloride (PVC) sheath—have emerged as a preferred choice for urban power grids, industrial and mining enterprises, and new energy distribution projects, thanks to their excellent price-performance ratio and reliable operational stability. Consequently, market interest in these cables continues to grow.
The 8.7/15kV YJLV cable—formally known as an "XLPE-insulated, PVC-sheathed, aluminum-conductor power cable"—is a widely used product in the field of medium-voltage power transmission. The "8.7/15kV" designation refers to the cable's rated voltage, making it suitable for power transmission and distribution lines with a rated voltage of 8.7/15kV or below. Compared to copper-conductor cables of the same specifications, YJLV cables utilize aluminum conductors; this ensures reliable power supply while significantly reducing material costs. Offering the distinct advantages of being lightweight and economical, they represent a highly cost-effective solution for medium-voltage distribution systems. The cable is composed of several layers—including the conductor, insulation, shielding, and sheath—with each component subject to rigorous manufacturing controls. The electrical-grade aluminum conductor provides excellent conductivity and low weight, which helps reduce the overall load on the line and simplifies installation. The insulation layer consists of cross-linked polyethylene (XLPE), a material processed via cross-linking to enhance both heat resistance and mechanical strength; it allows for a long-term operating temperature of up to 90°C and offers superior short-term overload capacity. The outer sheath is made of polyvinyl chloride (PVC), which provides effective protection against moisture, corrosion, and chemical agents.
Key benefits include high current-carrying capacity, excellent heat resistance, strong overload tolerance, and a long service life. The use of aluminum instead of copper allows for effective cost control—a particularly significant economic advantage for long-distance medium-voltage lines—making it a compelling choice for project planners seeking to balance performance with capital expenditure. Furthermore, these cables are flexible to install and easy to maintain; their lightweight nature and good bending characteristics make them suitable for a variety of installation environments. When paired with established termination and jointing technologies, they offer enhanced convenience for both installation and ongoing maintenance.
New Momentum for Power Distribution in Support of High-Quality Development: As the critical link between the power grid and end-users, medium-voltage distribution lines now demand higher standards for safety, cost-effectiveness, and environmental sustainability in cable products. With its stable operational performance, exceptional value, and mature manufacturing process, the 8.7/15kV YJLV cross-linked polyethylene (XLPE) insulated, aluminum-conductor power cable has emerged as a key choice for power distribution infrastructure projects. Looking ahead, as product technology and manufacturing capabilities continue to advance, the YJLV series is poised to play an increasingly significant role across a broader range of engineering applications.
