What are the advantages of aluminum alloy cables?
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- Time of issue:2021-11-17
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(Summary description)Creep resistance: The alloy material and annealing process of the aluminum alloy cable reduce the &ldquo of the conductor under heat and pressure ;creep" tendency, creep resistance is 300% higher than pure aluminum, thus avoiding relaxation caused by cold flow or creep.
What are the advantages of aluminum alloy cables?
(Summary description)Creep resistance: The alloy material and annealing process of the aluminum alloy cable reduce the &ldquo of the conductor under heat and pressure ;creep" tendency, creep resistance is 300% higher than pure aluminum, thus avoiding relaxation caused by cold flow or creep.
- Categories:News
- Author:
- Origin:
- Time of issue:2021-11-17
- Views:0
First, the advantages of aluminum alloy cable:
1. Creep resistance: The alloy material and annealing process of the aluminum alloy cable reduce the &ldquo of the conductor under heat and pressure ;creep" tendency, creep resistance is 300% higher than pure aluminum, thus avoiding relaxation caused by cold flow or creep.
2. Tensile strength and elongation: Compared with pure aluminum wires, aluminum alloy cables have special components added. Using a special processing technology, the tensile strength and elongation are greatly increased to 30%, which is safer and more reliable to use.
3. Thermal expansion coefficient: The thermal expansion coefficient of aluminum alloy is equivalent to that of copper. Aluminum connectors have been used reliably for copper and aluminum conductors for many years, and most electrical connectors used today are made of aluminum, which is especially true for aluminum alloys. Therefore, the expansion and contraction of aluminum alloy cables and connectors are exactly the same.
4. Connection performance: The electrical connection of the aluminum alloy cable is as safe and stable as the connection made of copper conductors. The composition of the aluminum alloy greatly improves the joint performance. When the conductor is annealed, the added iron produces high-strength creep resistance, which ensures connection stability even if overloaded and overheated for a long time.
5. Strong self-weight bearing capacity: aluminum alloy improves the tensile strength of pure aluminum, and the aluminum alloy cable can support 4 kilometers The weight of the copper cable can only support 2.75 kilometers. This advantage of aluminum alloy cables is particularly prominent when wiring large-span buildings (such as stadiums).
6. Anti-corrosion performance: The inherent anti-corrosion performance of aluminum comes from the formation of a thin and firm oxide layer when the aluminum surface is in contact with air. layer, which is particularly resistant to all forms of corrosion. Rare earth elements added to aluminum alloy cables can further improve the corrosion resistance of aluminum alloys, especially electrochemical corrosion.
7. Flexibility: Aluminum alloy has good bending properties, and its unique alloy formula and processing technology greatly improve the flexibility . The flexibility of aluminum alloy cable is 30% higher than that of copper, and the springback is 40% lower than that of copper. The bending radius of copper cables is generally 10 to 20 times the outer diameter, while the bending radius of aluminum cables is only 7 times the outer diameter, making it easier to connect terminals.
8. Compaction characteristics: Aluminum alloy cable adopts ultra-normal compaction technology, and the compaction coefficient can be Up to 0.93, and the compaction coefficient of special-shaped steel wire can reach 0.95. It can make up for the lack of volume conductivity of aluminum alloy cables, so that the core of the stranded conductor is like a solid conductor, the outer diameter of the core is significantly reduced, and the conductivity is improved. Under the same current carrying capacity, the outer diameter of the conductor is only 10% larger than that of the copper cable. .
Second, the difference between aluminum alloy cable and copper cable:
1. It can be directly distinguished from the color of the wire core. The color difference between aluminum and copper is very large.
2. Under the same power load, since the current carrying capacity of aluminum is much smaller than that of copper, the diameter of the aluminum wire is larger than that of copper. Wire. For example, for a 6KW electric water heater, 6 square meters of copper wire is enough, and 10 square meters of aluminum wire may be enough.
3. The price of aluminum is much lower than that of copper, so when the same distance meets the power supply requirements, aluminum alloy cable The cost is lower than copper cable, which can reduce the risk of theft (because the recycling price is low).
4. Aluminum alloy cables can be used as overhead bare wires, usually steel core aluminum stranded wires. Copper cables are mostly used for buried conductors, and are generally not used for bare wires without insulation.
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