The good mechanical and electrical properties of aluminum alloy power cables make it widely used in various fields of the national economy, such as ordinary houses, high-rise buildings, elevators, large and small supermarkets, subways, airports and stations, hospitals, banks , office buildings, hotels, post and telecommunications buildings, modern buildings, schools and public entertainment venues, etc. It can also be used in industries such as metallurgy, steel, coke, coal mines, power plants, power transmission and transformation stations, shipbuilding, petroleum, chemical industry, medicine, nuclear power plants, aerospace, military, papermaking, etc., as well as home appliances, automobiles, public transportation facilities, etc. Let’s see what its advantages are.
advantages of aluminum cables
(1) Conductivity, the conductivity of aluminum alloy is 61.5% of that of copper IACS, a commonly used reference material, and the carrying capacity is 79% of that of copper, which is better than the standard of pure aluminum.
(2) Tensile strength and elongation. Compared with pure aluminum conductors, aluminum alloy conductors have greatly improved tensile strength and elongation to 30% due to the addition of special components and special processing techniques. %, it is safer and more reliable to use.
(3) Creep resistance, the alloy material and annealing treatment process of the aluminum alloy conductor reduce the “creep” tendency of the conductor under heat and pressure. And compared with pure aluminum, the creep resistance can be improved by 300%, avoiding the relaxation problem caused by cold flow or creep.
(4) Flexibility. Due to the good bending properties of aluminum alloy, its unique alloy formula and processing technology greatly improve the flexibility. And aluminum alloy is 30% more flexible than copper, and its rebound is 40% lower than copper.
(5) Strong self-weight bearing capacity, the aluminum alloy improves the tensile strength of pure aluminum, the aluminum alloy cable can support the self-weight of 4000 meters in length, and the copper cable can only support 2750 meters.
(6) Anti-corrosion performance. The inherent anti-corrosion performance of aluminum comes from the formation of a thin and strong oxide layer when the aluminum surface is in contact with air. This oxide layer is particularly resistant to various forms of corrosion. The rare earth elements added to the alloy can further improve the corrosion resistance of the aluminum alloy, especially the electrochemical corrosion.
(7) Coefficient of thermal expansion , the coefficient of thermal expansion is used to calculate the dimensional change of the material when the temperature changes.
(8) Compression characteristics. In terms of volume conductivity alone, aluminum alloy is not as good as copper, but the conductor we developed not only improves the material performance, but also makes a breakthrough in the process. The compression technology makes the compression coefficient reach 0.93, while the compression coefficient of the special-shaped line can reach 0.95, which is the first in China.
(9) Armoring characteristics. Most of the armored cables commonly used in China are armored with steel tape, which has a low safety level. When subjected to external destructive forces, its resistance is poor, which is easy to cause breakdown, and the weight is heavy, and the installation cost is quite high. , coupled with poor corrosion resistance, the service life is not long.
At the same time, the armored structure isolates the cable from the outside world. Even in the event of a fire, the armored layer improves the flame-retardant and fire-resistant level of the cable and reduces the risk factor of fire. Compared with steel tape armoring, the aluminum alloy tape armored structure is light in weight and convenient to lay, and can be installed without bridges, which can reduce the installation cost by 20%~40%. Different outer sheath layers can be selected according to different places of use, making the armored cable more widely used.