Advantages and disadvantages of high speed copper cable and aluminum alloy wire cable


Published:

2021-08-23

Aluminum wire and cable are gradually entering the domestic market because copper metal resources are insufficient and copper prices are rising. The aluminum alloy material from toughness, tensile strength, weight are better than copper, and in the case of the same load flow, aluminum alloy cross section is only 1.1 -- 1.2 times larger than copper, the price is cheaper than copper, so, let's understand the advantages and disadvantages of high-speed copper cable and aluminum alloy wire cable comparison!

Advantages and disadvantages of high speed copper cable and aluminum alloy wire cable

Aluminum wire and cable are gradually entering the domestic market because copper metal resources are insufficient and copper prices are rising. The aluminum alloy material from toughness, tensile strength, weight are better than copper, and in the case of the same load flow, aluminum alloy cross section is only 1.1 -- 1.2 times larger than copper, the price is cheaper than copper, so, let's understand the advantages and disadvantages of high-speed copper cable and aluminum alloy wire cable comparison!

 

I. Advantages and disadvantages of high-speed copper cable and aluminum alloy wire and cable:

(1) The resistivity of high-speed copper cable is low: the resistivity of aluminum cable is about 1.68 times higher than that of copper cable.

(2) Good extension of high-speed copper cable:

(3) High strength of high-speed copper cable: allowable stress at room temperature: copper 20, aluminum 15.6kgt/mm2.

(4) high-speed copper cable fatigue resistance: aluminum is easy to break after repeated bending, and copper is not easy to break.

(5) High speed copper cable has good stability and corrosion resistance: copper core has oxidation resistance and corrosion resistance, but aluminum core is prone to oxidation and corrosion.

Two, a detailed analysis of the advantages of high-speed copper cable:

1. High carrying capacity of high-speed copper cable: due to low resistivity, the resistivity of copper cable with the same section is about 30) higher than the acceptable carrying capacity (the maximum current that can pass through) of aluminum cable. The voltage loss of copper cable is low, so when the same section has the same current flowing through. Copper cable has a very small voltage drop. Therefore, high voltage quality can be guaranteed at the same transmission distance. Or, under the allowed voltage drop condition, the transmission energy of copper core cable can reach a long distance, that is, the power supply covers a large area, which is conducive to network planning and can reduce the number of power supply points.

2. Optical fiber transmission loss has two characteristics, one is that all cable channels have the same loss, do not need to use equalizer like cable trunk; Second, its loss almost does not change with the temperature, there is no need to worry about the change of the main line level caused by the change of ambient temperature. Therefore, optical fiber transmission can be used safely and stably, and can be used in flammable, explosive and other dangerous places.

3 chemical corrosion resistance, long life, the material of the fiber itself is quartz (SiO2), the packaging material is generally a special engineering plastic, with very high corrosion resistance, so the adaptability to the environment is very strong, with the characteristics of acid and alkali resistance.

4. Less metal consumption is conducive to rational utilization of resources. The core of copper cable is made of copper, the use of metal, and the mass is not conducive to the rational use of resources, but also the phenomenon of cable theft. Optical fiber is made of silica, less metal consumption, light weight, not only conducive to laying, but also conducive to the rational use of resources.

5. Due to the low heating temperature of high-speed copper cable (the same current, the calorific value of the same section copper core cable is much smaller than aluminum core cable, safer operation, low power consumption of copper core cable), the resistivity of copper cable is lower than that of aluminum cable. When the connector of anti-aluminum core cable of copper cable is unstable, oxidation will lead to the increase of contact resistance, and fever often occurs. As a result, the accident rate is much greater than copper cable. Copper cable construction is convenient: the copper core has good softness, small bending radius, easy to bend, easy to pass the pipeline; Copper core anti-fatigue, even repeated bending is not easy to break, easy wiring; In addition, due to the high mechanical strength of the copper core, it can withstand a large mechanical tensile force.