The respective advantages of copper-core and aluminum-core cables

First, the copper core cable has more advantages than the aluminum core cable: 1. low resistivity: aluminum core cable resistivity than the copper core cable is about 1.68 times higher. 2. good ductility: copper alloy ductility of 20 ~ 40%, electrical copper ductility in more than 30%, while the aluminum alloy is only 18%. 3. high strength: the permissible stress at room temperature, copper than aluminum, respectively, higher than the 7-28%. 4. fatigue resistance: aluminum is easy to break repeated bending. 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. Stability, corrosion resistance: copper core oxidation, corrosion resistance, while the aluminum core is susceptible to oxidation and corrosion.6. Carrying capacity: due to the low resistivity, the same cross-section of copper-core cables than aluminum-core cables allow the current-carrying capacity (able to pass the larger current) is about 30% higher.7. Low voltage loss: due to the low resistivity of the copper cable, in the same cross-section The case of the same current flowing. The voltage drop of copper core cable is small. Therefore, the same transmission distance, can ensure higher voltage quality; or, in the allowed voltage drop conditions, copper-core cable transmission can reach a longer distance, that is, the power supply covers a large area, which is conducive to the planning of the network, reducing the number of power supply points set up.8. Low heating temperature: in the same current, the same cross-section of the copper-core cables of the heat than aluminum-core cables is much smaller, which makes the operation safer.9. Energy Consumption Low: 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. Antioxidant and corrosion resistance: The joints of copper-core cables are stable and will not cause accidents due to oxidation. Aluminum core cable connectors are unstable, often due to oxidation to increase the contact resistance, heat and accidents. Therefore, the accident rate is much larger than the copper-core cable.11. Convenient construction: ① copper core flexibility, allowing a small radius of curvature, so it is convenient to bend, easy to wear pipe; ② copper core fatigue resistance, repeated bending is not easy to break, so it is convenient to connect; ③ in the copper core of high mechanical strength, can withstand greater mechanical tension, to the construction of the construction of the laying of a great deal of convenience, and also for the creation of the conditions for the mechanization of the construction.-

Second, the advantages of aluminum core cable over copper core cable: 1. Cheap: copper rod is 3.5 times the price of aluminum rod, the specific gravity of copper is 3.3 times the aluminum, so aluminum core cable is much cheaper than copper core cable, suitable for low-cost projects or temporary power. 2. cable is very light: the weight of aluminum-core cable is 40% of the weight of the copper-core cable, construction and transportation are low-cost. 3. oxidation, corrosion resistance: aluminum reacts with oxygen in air and quickly generates an oxide film, which prevents further oxidation, so aluminum conductor is the necessary material for high-voltage, large cross-section, span overhead power transmission. Soon generate a kind of oxide film, can prevent further oxidation, so aluminum conductor is a high voltage, large cross-section, large span overhead transmission of the necessary materials.

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