The commonly used aluminum alloy wire varieties are as follows:
1. High-strength aluminum alloy wire
High-strength aluminum alloy wire is an aluminum alloy product with magnesium and silicon added to aluminum and processed to obtain sufficient strength, plasticity and electrical properties, deformation and heat treatment. It is the largest and most widely used aluminum alloy variety of aluminum alloy transmission lines. The electrical conductivity of high-strength aluminum alloy wire is 53% IACS, which is almost twice that of ordinary aluminum wire, and the single-wire strength of aluminum alloy is greater than 300Mpa. The strength of ordinary aluminum single wire is 150~170Mpa, and aluminum alloy wire has a greater advantage in strength.
2. Heat-resistant aluminum alloy wire
Heat-resistant aluminum alloys are classified into heat-resistant aluminum alloys with an electrical conductivity of 58% IACS and high-conductivity heat-resistant aluminum alloys in which yttrium is added to aluminum. Since the current carrying capacity of the wire used at 150°C can be increased by 61-69% than that of the wire used at 90°C, the heat-resistant aluminum alloy can be used as a compatible wire. The high-strength performance of high-strength heat-resistant aluminum alloy wire can improve its dynamic stability under short-circuit or overload conditions; its heat resistance can improve thermal stability. The super heat-resistant aluminum alloy and ultra-high heat-resistant aluminum alloy to be developed can further improve the current-carrying capacity and heat resistance of the wire, and further increase the long-term use temperature to 180°C, 210°C and 230°C.
Compared with traditional ACSR, high-strength aluminum alloy wire and heat-resistant low-resistance aluminum alloy wire have the following advantages:
(1) Under the same unit weight, the DC resistance of the aluminum alloy conductor is low. , The current capacity is large, the pulling force is large, the unit weight is larger than the pulling force;
(2) Compared with the condition of the same current-carrying capacity, aluminum alloy wire has the advantages of lighter weight, greater tensile force, and greater tensile force per weight. Aluminum alloy wire is a single material wire, easy to install and construct.
(3) The carrying hazard level of aluminum alloy conductors is low;
(4) The service life of ordinary steel core aluminum stranded wire is about 50 years, and the service life of aluminum alloy wire is more than 100 to 120 years.