Overhead cables are a new type of power transmission method between overhead conductors and underground cables. Named in 1984, they are primarily used in the energy and power sectors.
Manufactured using cross-linked cable technology, they are equipped with insulation layers and protective sheaths. Structurally, they can be classified into single-core types such as hard aluminum wire, hard-drawn copper wire, aluminum alloy wire, and steel or aluminum alloy core supported structures, as well as self-supporting three-core stranded structures. These cables feature high power supply reliability, good power supply safety, convenient installation and maintenance, and reasonable economic efficiency. Power supply reliability is 4-6 times higher than traditional bare conductors, supporting pole and tower installation or wall laying. Core technologies include weather-resistant insulation formulas, optimized insulation thickness, and semi-conductive shielding layer design, enabling stable operation in complex environments.
Large-scale production in my country began in the 1980s, and they have been widely used in urban power grid upgrades.