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1, Conductive properties: aluminum alloy conductivity is the most commonly used reference materials copper IACS 61.5%, load flow is 79% of copper, better than pure aluminum standard.
2, Creep Resistance: alloy materials of aluminum alloy conductor and annealing process reduce the conductor under heating and pressure of the "creep" tendency, compared to pure aluminum, creep resistance can be increased by 300%, to avoid the cold or creep caused by the relaxation problem.
3, tensile strength and elongation: aluminum alloy conductor compared to pure aluminum conductor, due to the addition of special components and the use of special processing technology, greatly improve the tensile strength, and the elongation rate increased to 30%, the use of more secure and reliable. 4. Coefficient of thermal expansion: the coefficient of thermal expansion is used to calculate the size change of the material when the temperature changes. The thermal expansion coefficient of aluminum alloy is comparable to that of copper, aluminum connectors have been reliably used in copper and aluminum conductors for many years, and most of the electrical connectors used today are made of aluminum, which is especially suitable for aluminum alloys.
So the aluminum alloy conductor and the connector expansion and contraction are exactly the same. 5, the weight bearing capacity of strong aluminum alloy to improve the tensile strength of pure aluminum, aluminum cable can support 4000 meters length of self-respect, copper cable can only support 2750 meters.
This advantage in the large span of the building (such as stadiums) when wiring is particularly prominent. 6, anti-corrosion properties of aluminum inherent anti-corrosion properties from when the aluminum surface and air contact to form a thin and strong oxidation layer, this oxidation layer is particularly tolerant of various forms of corrosion. The Rare-earth elements added in the alloy can further improve the corrosion resistance of aluminum alloy, especially the electrochemical corrosion. Aluminum can withstand harsh environmental characteristics so that it is widely used in the cable in the tray conductor, as well as many industrial components and containers. Corrosion is usually associated with different metals in moist environments, and protective measures can be used to prevent corrosion, such as lubricating oil, antioxidants and protective coatings. Alkaline soils and certain types of acidic soil environments have a greater corrosive effect on aluminum, so direct-laid aluminum conductors should use insulating or molded sheathing to prevent corrosion.
In sulfur-bearing environments, such as railway tunnels and other similar areas, the corrosion resistance of aluminum alloys is much better than that of copper. 7, flexible aluminum alloy has very good bending performance, its unique alloy formula, processing technology, so that flexibility greatly improved. Aluminum alloy is 30% more flexible than copper, and its elasticity is 40% lower than that of copper.
General copper Cable bending radius of 10~20 times outside diameter, and aluminum alloy cable bending radius is only 7 times times outside diameter, easier to terminal connection. 8, armored characteristics of the commonly used armored cable, most of the use of steel tape armored, low level of security, in the external destructive power, its ability to withstand poor, easy to lead to breakdown, and weight, installation costs are quite high, coupled with poor corrosion performance, the service life is not long. And we developed according to the United States standard metal chain armored cable, the use of aluminum alloy with Lian, its layer and layer of the chain between the structure, to ensure that the cable can withstand the external power, even if the cable suffered greater pressure and impact, the cable is not easy to penetrate, improve the safety performance. At the same time, the armored structure makes the cable isolated from the outside, even in the fire, the armored layer improves the flame retardant grade of the cable and reduces the fire risk coefficient. Aluminum alloy tape armored structure with steel tape armored, its light weight, laying convenient, can be free of bridge installation, can reduce 20%~40% installation costs.
Depending on the location of the use of different external sheath layer can be selected, so that the use of armored cable more extensive. 9, compact characteristics from the volume of electrical conductivity, aluminum alloy than copper, but our development of the conductor not only from the material performance improvements, but also in the process has made great breakthroughs, we use the ultra conventional compression technology, So that the pressure coefficient reaches 0.93, and the special-shaped line of the pressure coefficient can reach 0.95, in the domestic belong to the first. Through the maximum limit of the pressure, can make up for the aluminum alloy in the volume conductivity of the deficiency, so that the conductor core true core conductor, obviously reduce the diameter of the core, improve the conductivity, in the same load flow in the case of the conductor outside only 10% larger than the copper cable.