What is the main function of steel core aluminum stranded wire？

What is the main function of steel core aluminum stranded wire？

1. Introduction of steel core aluminum stranded wire

Steel-core aluminum stranded wire, abbreviated as ACSR, is a common material for overhead conductors. It consists of aluminum conductor and steel core, which is widely used in the field of power transmission and distribution because of its good conductivity, high strength and mechanical stability.

For high-voltage transmission lines, due to the limited path of the line, and it is impossible to rack multiple lines on a path, people came up with the use of a path, a set of towers, hanging multiple wires, that is, a line is equivalent to racking a number of lines of the method; 500KV transmission lines, most of the way our country hangs four conductors, which is named "four-split line ", in fact, this four split line is an ordinary four steel-core aluminum stranded wire, nothing special, not one is steel, three is aluminum; with the "bare" wire corresponds to, there are also overhead insulated wire, model JKLYJ, is an overhead aluminum cross-linked PVC encapsulated wire; in China's urban and Reliability requirements for power supply in China's cities and high power distribution system has been widely used, although the price is high, but it is the direction of development of power distribution lines.

2. The main role of steel core

Steel core is an important part of the steel core aluminum stranded wire, its main role is focused on the following aspects:

(1). Increase the strength and stability of the wire

Due to the addition of steel core, the strength of the entire conductor has been greatly improved. In the erection process, the steel core can also make the conductor's tensile deformation is small, that is, to increase the stability of the conductor, to prevent the occurrence of excessive elongation deformation, buckling deformation.

(2). Reduce the expansion and contraction of the core

Under the influence of the atmospheric temperature difference, the conductor will occur core expansion and contraction phenomenon, and even affect the safety of the conductor. The existence of steel core can reduce the thermal expansion and contraction deformation of the core, to overcome the deformation and displacement of the wire affected by temperature.

(3). Enhance the load-bearing capacity and safety of the wire

The addition of steel core can improve the load-bearing capacity and safety of the wire, increase the bending stiffness and bending fatigue resistance of the wire. In strong winds and adverse weather conditions, the presence of steel core can also improve the tensile capacity of the conductor to prevent the conductor from being blown off or collapse and other dangerous situations.

3. Summary

In summary, steel core is an important part of steel core aluminum stranded wire, and its role is very important. It can increase the strength and stability of the wire, reduce the expansion and contraction of the core, and improve the carrying capacity and safety of the wire. Special attention needs to be paid to the use of the wire, choose the correct wire specifications and use, in order to ensure the safe and stable work of the wire.