What are the advantages of copper cable over aluminum cable?

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 elongation of copper alloy is 20~40%, the elongation of electrical copper is more than 30%, and that of aluminum alloy is only 18%.

3. High strength: the allowable stress of copper at room temperature is 7~28% higher than that of aluminum. Especially the stress under high temperature, the difference between the two is very far.

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

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

6. Large current carrying capacity: due to low resistivity, the copper core cable with the same section has about 30% higher current carrying capacity (the maximum current that can pass) than the aluminum core cable.

7. Low voltage loss: due to the low resistivity of copper core cable, the same current flows through the same section. The voltage drop of copper core cable is small. The same transmission distance can ensure higher voltage quality; Under the condition of allowable voltage drop, the copper core cable transmission can reach a long 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 heating capacity of copper core cable with the same section is much smaller than that of aluminum core cable, making the operation safer.

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

10. Oxidation resistance and corrosion resistance: the connector of copper core cable has stable performance and will not cause accidents due to oxidation. The unstable joint of aluminum core cable will often lead to the increase of contact resistance due to oxidation and heating, resulting in accidents. Therefore, the accident rate is much higher than that of copper cable.

11. Convenient construction: the copper core is flexible and the allowable bending radius is small, so it is convenient to turn and pass through the pipe; The copper core is fatigue resistant and not easy to break due to repeated bending, so the wiring is convenient; The copper core has high mechanical strength and can withstand large mechanical tension, which brings great convenience to the construction and laying, and also creates conditions for mechanized construction.