1. Conductivity: The conductivity of aluminum alloy is 61.5% of the most commonly used benchmark material copper IACS, and the current carrying capacity is 79% of copper, which is superior to the standard for pure aluminum.
2. Creep resistance: The alloy material and annealing process of the aluminum alloy conductor reduce the tendency of the conductor to "creep" under heat and pressure. Compared to pure aluminum, the creep resistance is increased by 300%, avoiding relaxation problems caused by cold flow or creep.
3. Tensile strength and elongation: Compared to pure aluminum conductors, aluminum alloy conductors have greatly improved tensile strength due to the addition of special ingredients and the use of special processing techniques, and the elongation has been increased to 30%, making them safer and more reliable to use.
4. Thermal expansion coefficient: The thermal expansion coefficient is used to calculate the dimensional change of a material when the temperature changes.The thermal expansion coefficient of aluminum alloy is comparable to that of copper, and aluminum connectors have been reliably used for copper and aluminum conductors for many years. Most of the electrical connectors used today are made of aluminum, which is particularly suitable for aluminum alloy.Therefore, the expansion and contraction of aluminum alloy conductors and connectors are completely consistent.
5. Strong self-weight bearing capacity. Aluminum alloy improves the tensile strength of pure aluminum, and aluminum alloy cables can support a self-weight of 4000 meters in length, while copper cables can only support 2750 meters.This advantage is particularly evident in the wiring of large-span buildings such as sports venues.
6. Anti-corrosion performance: The inherent anti-corrosion performance of aluminum is due to the formation of a thin but strong oxide layer on the aluminum surface when it comes into contact with air. This oxide layer is particularly resistant to various forms of corrosion.The addition of rare earth elements to alloys can further improve the anti-corrosion performance of aluminum, especially electrochemical corrosion.The ability of aluminum to withstand harsh environments makes it widely used in the conductors of cables inside trays, as well as many industrial components and containers.The occurrence of corrosion is usually related to the connection of different metals in a humid environment, and corresponding protective measures can be used to prevent corrosion, such as the use of lubricants, antioxidants, and protective coatings.Alkaline soil and certain types of acidic soil environments have a high corrosivity to aluminum, so aluminum conductors that are directly buried should be protected against corrosion using insulating layers or molded sheaths.In sulfur-containing environments, such as railway tunnels and other similar places, the anti-corrosion performance of aluminum alloys is much better than that of copper.
7. Flexibility Aluminum alloy has excellent bending properties, and its unique alloy formulation and processing technology greatly improve its flexibility.Aluminum alloy is 30% more flexible than copper and has a lower elasticity than copper.The bending radius of typical copper cables is 10-20 times the outer diameter, while the bending radius of aluminum alloy cables is only 7 times the outer diameter, making it easier to connect terminals.
8. Armored characteristics Most of the commonly used armored cables in China use steel tape armor, which has a low safety level. When subjected to external destructive forces, its resistance is poor, easily leading to breakdown, and the weight is heavy, resulting in high installation costs. In addition, its corrosion resistance is poor and its service life is not long.However, the metal chain armored cable developed by us according to the American standard uses aluminum alloy tape chain armor. The chain structure between layers ensures that the cable can withstand strong external destructive forces. Even when the cable is subjected to large pressure and impact forces, it is not easily punctured, improving safety performance.At the same time, the armor structure isolates the cable from the outside world. Even in the event of a fire, the armor layer improves the flame retardant and fire resistance level of the cable, reducing the risk factor of fire.Compared with steel tape armor, the aluminum alloy tape armor structure is light weight, convenient to lay, can be installed without a tray, and can reduce installation costs by 20% to 40%.According to different usage sites, different outer sheath layers can be selected, making the use of armored cables more widely applicable.
9. Compact characteristics Considering only the volume conductivity, aluminum alloy is inferior to copper. However, the conductor we developed not only improved the material properties, but also made a big breakthrough in the process. We adopted an unconventional compact technology to achieve a compact factor of 0.93, while the compact factor of the shaped wire can reach 0.95, which is the first in China.Through the maximum limit of compact, it can make up for the deficiency of aluminum alloy in volume conductivity, making the stranded conductor core like a solid conductor, significantly reducing the outer diameter of the core and improving the conductivity. The outer diameter of the conductor is only 10% larger than that of copper cable under the same current carrying capacity.
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