Aerial Bundled Cable are created by extruding a specialized weather-resistant insulation layer over the conductor, resulting in a unique configuration that combines overhead installation with full insulation protection. They serve as a cost-effective alternative bridging the gap between two traditional power transmission methods.
I. Basic Structure and Standards
Aerial Bundled Cable are not simply standard cross-linked cables hung from utility poles; rather, they are specialized products engineered specifically for overhead applications. Their overall structure is simple yet reliable, designed to meet the demands of long-term outdoor operation.
Core Components:
The basic structure consists of two primary components: the conductor and the insulation layer. Certain specialized models designed for long spans incorporate an additional steel core for reinforcement. Conductors can be made from various materials—such as hard-drawn aluminum, hard-drawn copper, aluminum alloy, or soft copper—to suit specific tensile strength and current-carrying requirements. The outer insulation layer is available in three mainstream materials—PVC, standard PE, and XLPE—each offering different heat resistance ratings and service life expectancies.
Industry Standards and Mainstream Models:
A comprehensive standardization system for Aerial Bundled Cable has been established in China: low-voltage products (0.6/1 kV and below) comply with the GB/T 12527-2008 standard, while medium- and high-voltage products (10 kV, 20 kV, and 35 kV) adhere to the GB/T 14049-2008 standard. Industry model designations are clear and consistent; the JKLYJ (aluminum conductor, XLPE-insulated) and JKLGYJ (steel-reinforced aluminum conductor, XLPE-insulated) types are the most widely used in the market. The product range covers conductor cross-sections from 10 mm² to 500 mm², accommodating transmission needs across various load levels.
II. Key Application Advantages
Compared to traditional overhead bare conductors, Aerial Bundled Cable offer superior performance across multiple dimensions—a key factor driving their rapid adoption.
Significant Enhancement in Safety Levels
The outer insulation layer of Aerial Bundled Cable acts as a reliable "protective suit" for the conductor. Empirical data shows that it reduces the risk of electric shock by over 90%; when deployed in densely populated urban streets, near schools, or in residential areas, it fundamentally eliminates the vast majority of potential electric shock hazards.
Significantly Extended Service Life
The insulation layer completely seals out air, moisture, and chemical contaminants, offering three times the resistance to UV-induced degradation. In coastal areas with high salt-mist exposure or regions with heavy industrial pollution, the service life can reach 25–30 years—more than double that of standard bare conductors.
Greatly Reduced Operations and Maintenance Burden
Equipped with an integral insulation layer, these cables allow lightning currents to discharge smoothly along the outer surface, drastically reducing the impact force on the conductor core itself.
III. Typical Application Scenarios
Renovation of Older Urban Neighborhoods: Upgrades can be completed using existing poles and towers, eliminating the need for new land acquisition or tower construction, thereby minimizing disruption to residents' lives.
Complex Terrain in Forested and Mountainous Areas:These cables prevent tripping incidents caused by tree branches contacting the lines, significantly enhancing power supply stability in remote regions; they have become the preferred choice for rural grid upgrades.
Support for New Energy and Industrial Parks:They are ideal for power evacuation lines connecting photovoltaic and wind farms, as well as for capacity expansion projects in industrial parks, enabling rapid increases in regional power transmission capacity without requiring additional land for poles or towers.
IV. Industry Development Status
As the construction of new power systems progresses domestically and the global demand for grid upgrades grows, the market for overhead insulated cables is poised for sustained, long-term expansion. Meanwhile, the continuous evolution of technologies—such as weather-resistant insulation formulations and low-wind-resistance structural designs—will further broaden the scope of applications for these products.
