What are the advantages of aluminum alloy cable over ordinary cable?

What are the advantages of aluminum alloy cable over ordinary cable?

1, conductive performance: aluminum alloy conductivity is the most commonly used reference material copper IACS 61.5%, the flow is 79% of copper, better than pure aluminum standard.

2, creep resistance: aluminum alloy conductor alloy material and annealing process to reduce the conductor under heat and pressure "creep" tendency, relative to pure aluminum, creep resistance increased by 300%, to avoid the relaxation problem caused by cold flow or creep.

3, tensile strength and elongation: aluminum alloy conductor compared with pure aluminum conductor, due to the addition of special ingredients and the use of special processing technology, greatly improve the tensile strength, and elongation to 30%, the use of more safe and reliable.

4, thermal expansion coefficient: thermal expansion coefficient is used to calculate the size change of the material when the temperature changes. Aluminum alloys have a coefficient of thermal expansion comparable to copper, aluminum connectors have been reliably used for copper and aluminum conductors for many years, and most electrical connectors in use today are made of aluminum, which is especially suitable for aluminum alloys. So aluminum alloy conductor and connector expansion and contraction exactly the same.

5, strong dead weight aluminum alloy improves the tensile strength of pure aluminum, aluminum alloy cable can support 4000 meters length of dead weight, copper cable can only support 2750 meters. This advantage is particularly evident in the wiring of large span buildings, such as sports stadiums.

6, corrosion resistance The inherent corrosion resistance of aluminum is due to the formation of a thin and strong oxide layer when the aluminum surface is in contact with the air, which is especially resistant to various forms of corrosion. The addition of rare earth elements in the alloy can further improve the corrosion resistance of aluminum alloy, especially electrochemical corrosion. Aluminum's ability to withstand harsh environments makes it widely used as a conductor for cables in trays, as well as in many industrial components and containers. Corrosion is often associated with the connection of different metals in a humid environment and can be prevented by using protective measures such as lubricants, antioxidants and protective coatings. Alkaline soil and some types of acidic soil environment are more corrosive to aluminum, so directly buried aluminum conductor should use insulation layer or molded jacket to prevent corrosion. In environments containing sulfur, such as railway tunnels and other similar places, aluminum alloys are much more resistant to corrosion than copper.

7, flexibility aluminum alloy has good bending performance, its unique alloy formula, processing technology, so that the flexibility is greatly improved. Aluminum alloy is 30% more flexible than copper, and 40% less resilient than copper. Generally, the bending radius of copper cable is 10~20 times the outer diameter, while the bending radius of aluminum alloy cable is only 7 times the outer diameter, which makes it easier to connect terminals.

8, armored characteristics of commonly used domestic armored cables, mostly steel tape armored, low safety level, in the destructive power of the outside world, its poor resistance, easy to lead to breakdown, and heavy weight, installation cost is quite high, coupled with poor corrosion resistance, service life is not long. And we develop metal interlocking armored cable according to the American standard, using aluminum alloy interlocking armored, the interlocking structure between the layer and layer, to ensure that the cable can withstand the destructive power of the outside world, even if the cable suffers from greater pressure and impact, the cable is not easy to be broken down, improve the safety performance. At the same time, the armored structure makes the cable isolated from the outside world, even in the fire, the armored layer improves the fire retardant level of the cable, reduces the risk factor of fire. Compared WITH steel tape armored structure, aluminum alloy tape armored structure has light weight, convenient laying, can avoid the bridge installation, and can reduce the installation cost by 20%~40%. According to the use of different places can choose different outer sheath layer, so that the use of armored cable more widely.

9, compression characteristics Single from the bulk conductivity into consideration, aluminum alloy than copper, but we develop conductor is not only made from the aspects of material performance improvement, and also made big breakthrough in the field of technology, we adopt supernormal compression technology, make the compression coefficient is 0.93, and different lines of compression coefficient can reach 0.95, belong to the first in the country. The maximum compression can make up for the shortage of bulk conductivity of aluminum alloy cable, make the stranded conductor core as the core conductor, obviously reduce the core diameter, improve the conductivity, under the same load of the conductor diameter is only 10% larger than copper cable.