Copper core cable has several advantages over aluminum core cable:
First, good stability, good corrosion resistance - copper core is resistant to oxidation and corrosion, and aluminum core is susceptible to oxidation and corrosion.
Second, the heating temperature is lower - at the same current, the copper conductor of the same section has a much lower heat generation than the aluminum core cable, making the operation safer.
Third, the resistivity is low - the electrical resistivity of the aluminum core cable is about 1.68 times higher than that of the copper core cable.
Fourth, the high intensity - the allowable stress at room temperature, copper is 7 ~ 28% higher than aluminum. Especially the stress at high temperatures, the difference between the two is even more distant.
Fifth, the current carrying capacity is large - due to the low resistivity, the copper core cable of the same cross section is about 30% higher than the allowable current carrying capacity of the aluminum core cable (the maximum current that can be passed)
Sixth, low energy consumption - due to the low resistivity of copper, copper cables have low power loss compared to aluminum cables, which is obvious. This is conducive to improving power generation efficiency and protecting the environment.
Seven, anti-fatigue performance - aluminum repeated bending is easy to break, copper is not easy. In terms of elasticity, copper is also about 1.7 to 1.8 times higher than aluminum.
Eight, good ductility performance - copper alloy elongation rate of 20 ~ 40%, electrical copper with an elongation of more than 30%, and aluminum alloy is only 18%.
Nine, anti-oxidation, corrosion resistance - copper core cable connector performance is stable, 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 larger than that of copper core cables.
Ten, low voltage loss - due to the low resistivity of the copper core cable, the same current flows in 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 copper core cable can reach 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. .
Eleven, The construction is convenient.
The copper core is flexible and allows a small camber radius, so the turning is convenient and the pipe is easy to wear;
The copper core is anti-fatigue, and the repeated bending is not easy to break, so the wiring is convenient;
The copper core has high mechanical strength and can withstand large mechanical tension, which brings great convenience to construction laying and creates conditions for mechanized construction.