1. Low resistivity: The electrical resistivity of the aluminum core cable is about 1.68 times higher than that of the copper core cable.
2. Good ductility: The elongation of aluminum alloy is 20-40%, the elongation of copper for electricians is above 30%, and that of aluminum alloy is only 18%.
3. High strength: Allowable stress at room temperature, copper is 7-28% higher than aluminum. Especially the stress at high temperatures, the difference between the two is very far.
4. Anti-fatigue: Aluminum is easy to break after repeated bending, and steel is not easy. In terms of elasticity, steel is also about 1.7-1.8 times higher than aluminum.
5. Good stability and corrosion resistance: The copper core is resistant to oxidation and corrosion, while the aluminum core is susceptible to oxidation and corrosion.
6. Large current carrying capacity: Due to the low resistivity, the copper core cable of the same section is about 30% higher than the allowable current carrying capacity of the aluminum core cable (the maximum current that can be passed).
7. Low voltage loss: due to the low resistivity of the steel core cable, the same current flows through the same section. The copper core cable has a small voltage drop. The same transmission distance can guarantee higher voltage quality; under the allowable voltage drop condition, the power of the copper core cable reaches a long distance, that is, the power supply coverage area is large, which is conducive to network planning and reducing the number of power supply points. .
8. Low heat generation temperature: At the same current, the same-section steel core cable generates much less heat than the aluminum core cable, making operation safer.
9. Low energy consumption: Due to the low resistivity of copper, it is obvious that the power loss of copper cables is lower than that of aluminum cables. This is conducive to improving power generation efficiency and protecting the environment.
10. Anti-oxidation, corrosion resistance: The connector of the copper core cable has stable performance and will not cause accidents due to oxidation. When the joint of the aluminum core cable is unstable, the contact resistance is increased due to oxidation, and an accident occurs due to heat generation. Therefore, the accident rate is much higher than that of the copper core cable.
11. Convenient construction: the copper is flexible and the allowable bending radius is small, so the turning is convenient and the pipe is easy to wear; the copper core is resistant to fatigue and repeated bending and is not easy to break, so the connection is convenient; the copper core has high mechanical strength and can withstand large The mechanical tension brings great convenience to the construction and construction, and also creates conditions for mechanized construction.
