Introduction to Aluminum Alloy Cables

Aluminum alloy cable is a new type of material power cable. Aluminum alloy power cable is a new type of material power cable that uses AA8030 series aluminum alloy material as the conductor and adopts advanced technologies such as special rolling forming wire stranding production process and annealing treatment. Alloy power cables have made up for the shortcomings of pure aluminum cables in the past. Although they have not improved the conductivity of the cables, their bending performance, creep resistance, and corrosion resistance have greatly improved, ensuring that the cables maintain continuous and stable performance during long-term overload and overheating. The use of AA-8030 series aluminum alloy conductors can greatly improve the conductivity and high-temperature resistance of aluminum alloy cables, while solving problems such as pure aluminum conductors and creep.

The conductivity of aluminum alloy is 61.8% of the most commonly used reference material copper IACS, and the current carrying capacity is 79% of copper, which is better than the pure aluminum standard. But at the same volume, the actual weight of aluminum alloy is about one-third that of copper. Therefore, the weight of aluminum alloy cables at the same current carrying capacity is approximately half that of copper cables. Replacing copper cables with aluminum alloy cables can reduce cable weight, reduce installation costs, reduce equipment and cable wear, and make installation work easier.

performance

1、 Corrosion resistance

Pure aluminum has better corrosion resistance than copper, but aluminum alloys have better corrosion resistance than pure aluminum because the addition of rare earth and other chemical elements in aluminum alloys can increase the corrosion resistance of aluminum alloys, especially electrochemical corrosion resistance, solving the problem of long-term electrochemical corrosion of pure aluminum at joints.

2、 Mechanical properties

Firstly, tensile strength and elongation. Compared to pure aluminum conductors, aluminum alloy conductors greatly improve their tensile strength and elongation to 30% due to the addition of special components and the use of special processing techniques, making their use safer and more reliable.

Secondly, bending performance. The bending performance of aluminum core cables is poor, and they are prone to fracture when bent. The bending radius of aluminum alloy power cables is 7 times the outer diameter of the cable, which is much better than the 10 to 20 times the outer diameter of the cable specified in GB/T12706 "Minimum bending radius during cable installation".

Thirdly, flexibility performance. Pure aluminum cables can crack or break the conductor with just a few twists at a certain angle, which can easily lead to accidents. Aluminum alloy power cables can withstand dozens of bends, eliminating the hidden dangers of accidents during the installation and use of pure aluminum cables in the past, greatly improving safety and reliability performance.

3、 Conductivity

Aluminum alloy conductors are emerging conductor materials formed by adding rare earth, magnesium, copper, iron, and other elements to pure aluminum through alloying processes. As is well known, after adding various other alloy elements to aluminum, the conductivity will decrease, and through process control, the conductivity can be restored to a level close to that of pure aluminum, making it have a similar current carrying capacity as pure aluminum.

4、 Creep resistance

Pure aluminum has poor creep resistance. The Thermal expansion caused by power on and power off will cause large creep at the connection. After a long time, it will relax, and the contact resistance will increase, causing overheating, which is easy to cause accidents. The creep resistance of AA8000 series aluminum alloys is 300% of that of pure aluminum conductors, greatly reducing the possibility of cable joint relaxation and improving the connection condition of conductors.

Application scope

The excellent mechanical and electrical properties of aluminum alloy power cables enable them to be widely used in various fields of the national economy, such as ordinary residential buildings, high-rise buildings, elevators, large and small supermarkets and shopping malls, subways, airports, stations, hospitals, banks, office buildings, guesthouses and hotels, postal and telecommunications buildings, exhibition halls, libraries, museums, ancient buildings, schools, power buildings, public entertainment venues, tunnels Underground buildings, warehouses, etc. can also be used in industries such as metallurgy, steel, coke, coal mines, power plants, transmission and transformation power plants, shipbuilding, petroleum, chemical, pharmaceutical, nuclear power plants, aerospace, military, papermaking, as well as household appliances, automobiles, public transportation facilities, etc.