What are the advantages of copper cables over aluminum cables?
1. Low resistivity: The resistivity of aluminum core cable assembly is about 1.68 times higher than that of copper core cable assembly.
2. Excellent ductility: The ductility of copper alloy is 20-40%, the ductility of electrical copper is above 30%, while that of aluminum alloy is only 18%.
3. High strength: For the allowable stress at room temperature, copper is 7~28% higher than aluminum. Especially the stress at high temperature, the difference between the two is even further.
4. Fatigue resistance: Aluminum is easy to crack after repeated bending, but copper is not easy. In terms of flexibility, 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 subject to oxidation and corrosion.
6. Large current-carrying capacity: Because of low resistivity, copper-core cables with the same cross-section are about 30% higher than the current-carrying capacity allowed by aluminum-core cables.
7. Low voltage loss: Because the resistivity of the copper core cable assembly is low, the same current flows through the same cross section. The voltage drop of the copper core cable assembly is small. The same transmission interval can ensure higher voltage quality; under the allowed voltage drop, the transmission distance of copper core cable assembly reaches a farther 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 heat generation of copper core cables with the same cross section is much smaller than that of aluminum core cables, making the operation safer.
9. Low energy consumption: Because of the low resistivity of copper, compared with aluminum cables, the power loss of copper cables is low, which is clear. This is conducive to improving the utilization rate of power generation and protecting the environment.
10. Anti-oxidation and anti-corrosion: the connector function of copper core cable is stable and will not cause accidents due to oxidation. When the joint of the aluminum core cable is unstable, the touch resistance will often increase due to oxidation, which will cause an accident. Therefore, the accident rate is much greater than copper core cable.