Aluminum cable is a very mature high-tech environmental energy smart green power cable, which is widely used in Europe and America. For 40 years, the market in the developed countries in Europe and America has a 90 % share in the market. Aluminum cable not only has the complete replacement of traditional copper core cable from electrical performance, safety performance, but also saves a lot of power facilities investment cost, and accords with the development theme of economical society, green energy conservation, economic environment protection, and flexibility ( bending radius ratio of half, copper cable is 15 ~ 20 times outside diameter ).

1. corrosion resistance

The corrosion resistance of pure aluminum is better than that of copper, but the corrosion resistance of aluminum alloy is better than pure aluminum, because the chemical elements such as rare earth elements can increase the corrosion resistance of aluminum alloy, especially the chemical corrosion resistance, the electrochemical corrosion of pure aluminum.

Ii. mechanical properties

First, tensile strength and elongation. Compared to pure aluminum conductor, because of adding special components and using special processing technology, the tensile strength is greatly improved, elongation is increased to 30 %, and the use is safer and more reliable.

Second, bending performance. The bending performance of aluminum conductor cable is very poor, bending is easy to fracture, the bending radius of aluminum alloy power cable is 7 times the outside diameter of cable, and is far better than 10 times - 20 times of cable diameter specified in GB / t12706" cable installation ".

Third, flexibility. As long as the pure aluminum cable is twisted several times, the conductor will be cracked or broken, easy to cause accident, and aluminum alloy power cable can withstand several decades of bending, eliminate the hidden trouble in the past, and greatly improve the safe and reliable performance.

Iii. conductivity

Aluminum alloy conductor is a new conductive material which is added rare earth, magnesium, copper and iron in pure aluminum. It is well known that after adding many other alloying elements in aluminum, the conductivity decreases, and through the process control, conductivity can be restored to the level of approaching pure aluminum, which has a similar carrying capacity with pure aluminum.

Iv. Resistance to creep performance

The pure aluminum creep performance difference, the Thermal expansion caused by the power and power off will cause creep value in the connection, after a long time, the relaxation, the contact resistance increases and the overheat, easy to cause an accident. The creep of aa8000 series aluminum alloy is 300 % of pure aluminum conductor, greatly reducing the possibility of cable joint relaxation and improving the connection of the conductor.