In what ways are copper-core cables different from aluminum-core cables?

I. What are the differences between copper-core cables and aluminum-core cables? 1. low resistivity: the resistivity of aluminum-core cables is about 1.68 times higher than that of copper-core cables. 2. good ductility: the ductility of copper alloys is 20~40%, the ductility of copper for electrical use is more than 30%, while aluminum alloys are only 18%. 3. high strength: the permissible stress at room temperature, copper is higher than aluminum, respectively, by 7-28%. 4. fatigue resistance: aluminum is easy to break by repeated bending, copper is not easy. Especially at high temperatures, the difference between the two stress is very far. 4. fatigue resistance: aluminum is easy to break repeated bending, copper is not easy. Elasticity indicators, copper is also higher than aluminum about 1.7 ~ 1.8 times. 5. good stability, corrosion resistance: copper core oxidation, corrosion resistance, while the aluminum core is susceptible to oxidation and corrosion. 6. high current-carrying capacity: due to the low resistivity, the same cross-section of the copper-core cables than the aluminum-core cables allow a higher current-carrying capacity (able to pass through the higher current) of about 30%. 7. low voltage loss: due to the low resistivity of the copper cable in the same cross-section flow through the same current. cross-section of the same current flowing through the case, the copper core cable voltage drop is small. For the same transmission distance, higher voltage quality can be guaranteed; under the condition of permitted voltage drop, copper-core cable transmission can reach a longer distance, i.e., the power supply covers a large area, which is conducive to the planning of the network and the reduction of the number of power supply points set up. 8. Low heat generation: 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, which makes the operation safer. 9. Low energy consumption: due to the low resistivity of copper, compared with aluminum cables, copper-core cables are much safer than aluminum cables. 10. Low energy consumption: Due to the low resistivity of copper, it is obvious that copper cables have low power loss compared to aluminum cables. This is conducive to improving the utilization of power generation and protecting the environment. 10. Resistance to oxidation and corrosion: The connectors of copper-core cables are stable and will not cause accidents due to oxidation. Aluminum core cable's connector is unstable, often due to oxidation to make the contact resistance increase, heat and accidents. Therefore, the accident rate is much larger than the copper-core cable. 11. convenient construction: copper core flexibility, allowing a small radius of bend, so easy to turn, easy to wear pipe; copper core fatigue resistance, repeated bending is not easy to break, so easy to connect; in the copper core of the mechanical strength is high, can withstand a large mechanical tensile force, to the construction of the construction of the laying of the construction has brought a great deal of convenience, but also for the mechanization of the construction of the creation.

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