The advantage of aluminum alloy cable over ordinary cables is that under the same volume, the actual weight of aluminum alloy is about one-third of copper. According to this calculation, under the premise of meeting the same electrical conductivity, the length of the aluminum alloy cable with the same weight is twice that of the copper cable. Therefore, the weight of the aluminum alloy cable is about half of the copper cable at the same current carrying capacity. The use of aluminum alloy cables instead of copper cables can reduce the weight of the aerial bundled cable ASTM b231, reduce the installation cost, reduce the wear of the equipment and the cable, and make the installation work easier.
Aluminum alloy power cable is a new type of material power cable created by advanced technologies such as AA-8000 series aluminum alloy material as the conductor, using special pressing technology, annealing treatment, and chain armoring technology.
The difference between aluminum alloy cables and ordinary cables: aluminum alloy cables use AA-8000 series aluminum alloy conductors, while ordinary cables use copper or pure aluminum as cable conductors.
Tensile strength and elongation
Compared with pure aluminum conductors, aluminum alloy conductors have greatly improved tensile strength due to the addition of special ingredients and special processing techniques, and the elongation rate has increased to 30%, making it safer and more reliable to use.
Thermal expansion coefficient
The coefficient of thermal expansion is used to calculate the dimensional change of the material when the temperature changes. The coefficient of thermal expansion of aluminum alloy is equivalent to that of copper. Aluminum connectors have been reliably used for 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 expansion and contraction of the aluminum alloy conductor and the connector are exactly the same.
Strong weight bearing capacity
Aluminum alloy improves the tensile strength of pure aluminum. Aluminum alloy cables can support a weight of 4000 meters, while copper cables can only support 2750 meters. This advantage is particularly prominent when wiring large-span buildings (such as stadiums).
Most commonly used armored aerial bundled cables(abc) b230 standard in China are armored with steel tape, with low security level. When subjected to external destructive forces, their resistance is poor, which is easy to cause breakdown, and the weight is heavy, the installation cost is quite high, and the corrosion resistance is poor. The service life is not long. The metal interlocking armored cable we developed according to American standards uses aluminum alloy tape interlocking armor. The interlocking structure between the layers ensures that the cable can withstand the strong destructive force from the outside, even if the cable is subjected to greater pressure The cable is not easy to be punctured under the impact force, which improves the safety performance. 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 of fire. Compared with the steel tape armored structure, the aluminum alloy tape armored structure is lighter in weight and convenient to lay. It can be installed without bridges and can reduce installation costs by 20% to 40%. Different outer sheath layers can be selected according to different places of use, which makes the use of armored cables more extensive.