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%, while that of electrical copper is over 30%, while that of aluminum alloy is only 18%.
3.High strength: The allowable stress at room temperature is 7-28% higher for copper than for aluminum, especially at high temperatures, where the difference is even greater.
4. Anti-fatigue: Aluminum is prone to fracture due to repeated bending, while copper is less prone.In terms of elasticity indicators, copper is also about 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 susceptible to oxidation and corrosion.
6. Large current-carrying capacity: Due to its low resistivity, copper-core cables with the same cross-section allow a current-carrying capacity (the maximum current that can pass through) that is about 30% higher than aluminum-core cables.
7. Low voltage loss: Due to the low resistivity of copper core cables, under the same current flowing through the same cross-section, the voltage drop of copper core cables is small.With the same transmission distance, it can ensure high voltage quality;under the allowable voltage drop conditions, copper core cables can transmit power over a long distance, which is conducive to network planning and reduces the number of power supply points.
8.Low heating temperature: At the same current, the heating capacity of copper core cable with the same cross-section is much lower than that of aluminum core cable, making the operation safer.
9.Low energy consumption: Due to the low resistivity of copper, compared to aluminum cables, copper cables have lower power loss, which is obvious.This is beneficial for improving power generation utilization and protecting the environment.
10. Anti-oxidation and corrosion resistance: The copper core cable connector has stable performance and will not cause accidents due to oxidation.The aluminum core cable connector is unstable and often causes contact resistance to increase due to oxidation, resulting in heating and accidents.Therefore, the accident rate is much higher than that of copper core cables.
11. Convenient construction:
Copper core has good flexibility and allows a small bending radius, making it easy to turn corners and penetrate pipes;
Copper core is resistant to fatigue and is not easily broken by repeated bending, so it is convenient for wiring;
The high mechanical strength of copper core can withstand large mechanical tension, which brings great convenience to construction and laying, and also creates conditions for mechanized construction.
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