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 ductility of aluminum alloy is 20-40%, that of copper for electrical use is above 30%, while that of aluminum alloy is only 18%.
3. High strength: the allowable stress at room temperature, copper is 7-28% higher than that of aluminum. Especially the stress at high temperature, the two are very different.
4. Anti-fatigue: aluminum is easy to break after repeated bending, but steel is not easy. In terms of elasticity index, steel is also about 1.7-1.8 times higher than aluminum.
5. Good stability and corrosion resistance: The copper core is anti-oxidation and corrosion-resistant, while the aluminum core is susceptible to oxidation and corrosion.
6. Large current carrying capacity: Due to the low resistivity, the copper core cable with the same cross-section is about 30% higher than the allowable current carrying capacity (the maximum current that can pass through) of the aluminum core cable.
7. Low voltage loss: Due to the low resistivity of the steel core cable, the same current flows through the same section. The voltage drop of copper core cable is small. The same power transmission distance can ensure higher voltage quality; under the condition of allowable voltage drop, the power of the copper core cable can reach a longer 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 value of the steel core cable with the same cross section is much smaller than that of the aluminum core cable, making the operation safer.
9. 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 rate of power generation and protecting the environment.
10. Anti-oxidation and corrosion resistance: The performance of the connector of the copper core cable is stable, and there will be no accidents due to oxidation. The joints of aluminum core cables are often unstable due to oxidation, which increases the contact resistance and generates heat, resulting in accidents. Therefore, the accident rate is much higher than that of copper core cables.
11. Convenience in construction: copper is flexible, and the allowable curvature radius is small, so it is convenient to bend and pass through the pipe; the copper core is fatigue-resistant, and it is not easy to break after repeated bending, so the connection is convenient; the mechanical strength of the copper core is high and can withstand large The high mechanical tension brings great convenience to construction and laying, and also creates conditions for mechanized construction.
Post time: May-17-2022