Common aluminum clad steel strand is used as conductor; The steel core is mainly used to increase the strength, and the aluminum strand is mainly used to transmit electric energy. The cross-sectional area of the conductor varies depending on the voltage. For example, the conductors of 500 kV transmission lines are generally LGJ-400/35 conductors. L is the abbreviation of aluminum wire, G is the abbreviation of steel core, J is the abbreviation of strand, 400 is aluminum 400 mm2, 35 is steel 35 mm2.

Aluminum alloy cables add copper, iron, magnesium, silicon, zinc, boron and other alloy elements to electrical aluminum. At the same time, through process adjustment, the mechanical properties of aluminum alloy conductors are greatly improved, avoiding the problems of low elongation, poor creep resistance and poor flexibility of pure aluminum conductors, and increasing the connection reliability of the cable system. In addition, keep the electrical performance of aluminum alloy equal to that of electrical aluminum conductor, which is above 61% IACS.