The advantages of copper core cable over aluminum core cable:
1. Low resistivity: The resistivity of the aluminum core cable is about 1.68 times higher than that of the copper core cable.
2. Good ductility: The elongation rate of copper alloy is 20 to 40%, the extension rate of copper for electrical use is more than 30%, and the aluminum alloy is only 18%.
3. High strength: Permissible stress at room temperature, copper is 7~28% higher than aluminum. Especially the stress at high temperature, the difference between the two is even far.
4. Anti-fatigue: aluminum repeated bending and easy to break, copper is not easy. In terms of elasticity, copper is about 1.7 to 1.8 times higher than aluminum.
5. Good stability, 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 cross-section is about 30% higher than the allowable ampacity (the maximum current that can pass) of the aluminum-core cable. Low voltage loss: Due to the low resistivity of the copper core cable, the same current flows through the same section. The voltage drop of the copper core cable is small. Therefore, the same transmission distance can guarantee higher voltage quality; or, under the condition of allowable voltage drop, the copper core cable can transmit electricity at a relatively long distance, ie, the power supply coverage area is large, which is conducive to network planning and reduction. The number of supply points is set.
8. Low heating temperature: Under the same current, the copper cable of the same section has a much smaller heating capacity than the aluminum core cable, making the operation more secure.
9. Low energy consumption: Because of the low resistivity of copper, the power loss of copper cables is low compared to aluminum cables, which is obvious. This will help improve the efficiency of power generation and protect the environment.
10. Anti-oxidation and anti-corrosion: The connector of the copper core cable has stable performance and will not cause accidents due to oxidation. The joints of the aluminum core cable are often unstable and cause accidents due to increased contact resistance and heat generation due to oxidation. Therefore, the accident rate is much larger than copper-core cables.
11. Construction is convenient: 1 The copper core has good flexibility, and the allowable radius of curvature is small, so the turning is convenient, and the pipe is easy to wear; 2 The copper core is resistant to fatigue, repeated bending is not easy to break, so the wiring is convenient; 3 the copper core has high mechanical strength and can withstand Larger mechanical tension has brought great convenience to construction and laying, and also created conditions for mechanized construction.
Aluminum core cable advantages:
1. Cheaper prices: Copper rods are 3.5 times the price of aluminum rods, copper is 3.3 times that of aluminum, so aluminum core cables are much cheaper than copper core cables, suitable for low-cost projects or temporary electricity.
2. The cable is very light: the weight of the aluminum core cable is 40% of that of the copper core cable, and the construction transportation cost is low.
3. Anti-oxidation, anti-corrosion: Aluminum reacts with oxygen in the air to form an oxide film, which can prevent further oxidation. Therefore, aluminum wire is an essential material for high-voltage, large-section, and long-span overhead transmission.
Although the aluminum core cable is cheap, the copper cable has prominent advantages in the cable power supply, especially in the field of underground cable power supply. Underground power supply using copper core cable has the characteristics of low accident rate, corrosion resistance, high reliability, and convenient construction and maintenance. This is also the reason why domestic copper cables are mainly used in underground power supply.
1. Low resistivity: The resistivity of the aluminum core cable is about 1.68 times higher than that of the copper core cable.
2. Good ductility: The elongation rate of copper alloy is 20 to 40%, the extension rate of copper for electrical use is more than 30%, and the aluminum alloy is only 18%.
3. High strength: Permissible stress at room temperature, copper is 7~28% higher than aluminum. Especially the stress at high temperature, the difference between the two is even far.
4. Anti-fatigue: aluminum repeated bending and easy to break, copper is not easy. In terms of elasticity, copper is about 1.7 to 1.8 times higher than aluminum.
5. Good stability, 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 cross-section is about 30% higher than the allowable ampacity (the maximum current that can pass) of the aluminum-core cable. Low voltage loss: Due to the low resistivity of the copper core cable, the same current flows through the same section. The voltage drop of the copper core cable is small. Therefore, the same transmission distance can guarantee higher voltage quality; or, under the condition of allowable voltage drop, the copper core cable can transmit electricity at a relatively long distance, ie, the power supply coverage area is large, which is conducive to network planning and reduction. The number of supply points is set.
8. Low heating temperature: Under the same current, the copper cable of the same section has a much smaller heating capacity than the aluminum core cable, making the operation more secure.
9. Low energy consumption: Because of the low resistivity of copper, the power loss of copper cables is low compared to aluminum cables, which is obvious. This will help improve the efficiency of power generation and protect the environment.
10. Anti-oxidation and anti-corrosion: The connector of the copper core cable has stable performance and will not cause accidents due to oxidation. The joints of the aluminum core cable are often unstable and cause accidents due to increased contact resistance and heat generation due to oxidation. Therefore, the accident rate is much larger than copper-core cables.
11. Construction is convenient: 1 The copper core has good flexibility, and the allowable radius of curvature is small, so the turning is convenient, and the pipe is easy to wear; 2 The copper core is resistant to fatigue, repeated bending is not easy to break, so the wiring is convenient; 3 the copper core has high mechanical strength and can withstand Larger mechanical tension has brought great convenience to construction and laying, and also created conditions for mechanized construction.
Aluminum core cable advantages:
1. Cheaper prices: Copper rods are 3.5 times the price of aluminum rods, copper is 3.3 times that of aluminum, so aluminum core cables are much cheaper than copper core cables, suitable for low-cost projects or temporary electricity.
2. The cable is very light: the weight of the aluminum core cable is 40% of that of the copper core cable, and the construction transportation cost is low.
3. Anti-oxidation, anti-corrosion: Aluminum reacts with oxygen in the air to form an oxide film, which can prevent further oxidation. Therefore, aluminum wire is an essential material for high-voltage, large-section, and long-span overhead transmission.
Although the aluminum core cable is cheap, the copper cable has prominent advantages in the cable power supply, especially in the field of underground cable power supply. Underground power supply using copper core cable has the characteristics of low accident rate, corrosion resistance, high reliability, and convenient construction and maintenance. This is also the reason why domestic copper cables are mainly used in underground power supply.
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