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What are the advantages of copper core cables compared to aluminum core cables?

Time of Issue:

2021-05-04

　　With the improvement of people's living standards and the rapid advancement of science and technology, more and more copper core cables are replacing aluminum core cables on the market. Today, I will analyze the advantages of the comparison between the two.

　　1. Low resistivity: the resistivity of aluminum core cable is about 1.68 times higher than that of copper core cable.

　　2. Good ductility: the ductility of copper alloy is 20-40%, the ductility of electrical copper is more than 30%, while the ductility of aluminum alloy is only 18%.

　　3. High strength: Under normal temperature, under the promised stress, copper is 7~28% higher than aluminum respectively. Especially the stress at high temperature, the difference between the two is even greater.

　　4. Anti-fatigue: Aluminum is easy to crack after repeated bending, while copper is not easy. In terms of elasticity index, copper is also about 1.7 to 1.8 times higher than aluminum.

　　5. Good stability and corrosion resistance: The copper core is resistant to oxidation and corrosion, while the aluminum core is susceptible to oxidation and corrosion.

　　6. Large current carrying capacity: due to the low resistivity, the copper core cable with the same cross-section is about 30% higher than the promised carrying capacity (the large current that can pass) of the aluminum core cable.

　　7. Low voltage loss: Due to the low resistivity of the copper core cable, the same current flows in the same section. The voltage drop of the copper core cable is small. The same transmission distance can ensure higher voltage quality; under the agreed voltage drop conditions, the copper core cable can reach a longer distance, that is, the power supply coverage area is large, which is conducive to network planning and reduces the number of power supply points.

　　8. Low heating temperature: Under the same current, the copper core cable with the same cross section has much smaller heat than the aluminum core cable, which makes the operation safer.

　　9. Low energy consumption: Due to the low electrical resistivity of copper, it is obvious that copper cables have low power loss compared to aluminum cables. This is conducive to improving the utilization rate of power generation and protecting the environment.

　　10. Anti-oxidation and corrosion resistance: The performance of the connector of the copper core cable is stable and will not cause trouble due to oxidation. When the joints of aluminum core cables are unstable, the contact resistance will increase due to oxidation and heat generation will cause accidents. Therefore, the incident rate is much greater than that of copper core cables.

　　11. Convenient construction: The copper core has good flexibility and the promised bend radius is small, so it is convenient to bend and easy to pass through; the copper core is anti-fatigue, repeated bending is not easy to crack, so it is convenient to connect; the copper core has high mechanical strength and can withstand greater The mechanical pulling force of this kind brings great convenience to construction and laying, and also creates conditions for mechanized construction.

　　The above analysis of a series of advantages of copper core cables, presumably everyone has a certain understanding. There will be better use in the construction process.

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