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About UsHongsheng Wire and Cable Co., Ltd. is a key enterprise in Zhejiang Province specializing in the production of wires and cables, integrating industry, commerce, trade, production, education, and research. Its main production, processes, and testing equipment are all designed and configured according to international standards.
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ProductsEmploy scientific management and quality assurance systems based on GB/T19001—IS09001 and GB/T24001—ISO14001 environmental management systems to organize production management.
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Contact UsWe believe: Great achievements depend on quality. Your satisfaction is our eternal pursuit!
21
2022
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01
Copper core cables have obvious advantages and broad development prospects
With the continuous development and innovation of power grid construction, and the further complexity of the power system operating environment, higher requirements are put forward for the safe and stable operation of the power grid, and the requirements for power grid equipment and materials have also become very strict. In the face of new demands with constantly improving standards, more funds must be invested in power grids and urban distribution networks, better designs must be implemented, and better materials must be used. Experts believe that copper core cables have become products that ensure the reliability, electrical safety, and energy saving of power grids.
With the continuous development and innovation of power grid construction, and the further complexity of the power system operating environment, higher requirements are put forward for the safe and stable operation of the power grid, and the requirements for power grid equipment and materials have also become very strict. In the face of new demands with constantly improving standards, more funds must be invested in power grids and urban distribution networks for better design and better materials. Experts believe that copper core cables have become products that ensure the reliability, electrical safety, and energy saving of power grids.
A significant material substitution in the wire and cable industry is the use of aluminum conductors instead of copper conductors. When considering the relative cost of copper and aluminum conductors, factors such as price, specific gravity, and conductivity must be considered to obtain a practical answer as to whether the use of aluminum conductors can reduce costs. Copper is heavier than aluminum. The specific gravity of copper is 8.9g.cm3, and the specific gravity of aluminum is 2.7g/cm3. That is to say, under the same conductor specifications, the weight of the copper conductor is 3.3 times that of the aluminum conductor. However, the conductivity of aluminum is only 61% of that of copper. That is to say, under the same current, the cross-sectional area of the aluminum conductor is 61% larger than that of the copper conductor. Therefore, in terms of conductor weight, for two conductors to have the same current carrying capacity, the required weight of the copper conductor is approximately twice that of the aluminum conductor. In addition, the price ratio of copper to aluminum is about 3.5, so the cost of the same copper conductor is 7 times that of the aluminum conductor.
Of course, the simple cost comparison above does not explain everything. Cable products are products with standard conductor specifications, so cables with aluminum cores that have exactly the same conductivity as copper core cables cannot be purchased. Therefore, when making cables with aluminum conductors, aluminum conductors with a larger cross-sectional area must be used. Practice has proved that, under the same current carrying capacity, the cross-sectional area of the aluminum core cable should be twice that of the copper core cable. Since the cross-sectional area of the aluminum core cable conductor is twice that of the copper core cable conductor, the subsequent increase in the insulation, sheath, and armor materials of the aluminum core cable weakens the price advantage of using the aluminum core conductor. This means that the price advantage of aluminum compared to copper is not large, because the conductor is only a small part of the total cost of the cable after all.
Since China's reform and opening up, copper core cables have largely replaced aluminum cables. Part of the reason is that the domestic and international markets have been grafted. Because the price of copper materials is a bit expensive, but the power sector can afford it, exchanging safety and reliability, and construction is convenient. Second, from the perspective of safety and reliability, the key to using aluminum core power lines is that the connector technology and its reliability are problematic. Third, in some cities, especially large cities, underground land space is limited, and aluminum core power lines are not used.
Experts believe that, as a distribution cable, not only the conductivity of the cable should be considered, but also the conductivity of the cable system. This means that the conductivity of the intermediate connection and terminal connection of the cable must be considered. This is the key to ensuring the reliability of the cable television system.
Copper core cable
Guangzhou Baiyun International Airport
2017-09-13
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2017-09-13
2021-04-13
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Address: Central Industrial Park, Luqiao District, Taizhou City, Zhejiang Province
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