High-conductivity aluminum alloy cable is a new type of cable. Due to its special conductor formula and heat treatment process, the conductor material greatly reduces the tendency to creep due to heat and pressure, and the cable can maintain its thermal overload even for a long time. The stability of the connection; interlocking armored cable unique arch interlocking armored structure, superior dispersion lateral pressure performance. At the same time, it also has the advantages of fast heat dissipation, strong corrosion resistance, strong toughness, and easy bending. The interior of the armor is smooth, it will not cut insulation, and it has perfect characteristics of excellent shielding and flame retardant.
In order to better analyze the technical performance of highly conductive aluminum cables , this article describes the following dozens of aspects in order to allow people in the industry to better understand high-conductivity aluminum alloy cables and apply them to project practice.
In general, aluminum alloys are lightweight, equivalent to about 50% of the replacement copper cables. The length of aluminum alloy cables of the same quality is twice that of copper cables. For large-span buildings, 15% of the steel structure can be saved and smaller. The additional load can increase the safety of the building itself. At present, aluminum alloy cable products have successfully completed the actual installation and use of nearly 500 projects in residences, star hotels, hospitals, theaters, convention centers, libraries, government agencies, financial centers, petrochemicals, airports, and ships. It has been widely used in subway, iron and steel smelting projects.
First of all, it should be clear that the loss of electrical energy during transmission depends on the conductor resistance rather than the resistivity. Compared to copper conductors, aluminum conductors have a high resistivity. Many people have come to the conclusion that aluminum conductor cables have large losses during power transmission. It is unscientific to conclude that aluminum has a greater loss than copper.
Mechanical properties have also been improved: due to the addition of alloying elements such as iron, copper, and rare earth elements in pure aluminum, the overall performance of the aluminum alloy is improved, and the elongation and creep properties are improved. At the same time, alloying also increases the tensile strength of the aluminum alloy.
The elongation rate is increased to more than 25%, which greatly improves the bending performance. The minimum bending radius of the aluminum alloy cable installation is more than 7 times the cable diameter, which is far less than the minimum bending radius of the cable installed in GB12706-2008 "Excluding Insulated Power Cables and Accessories Rated Voltage from 1kV to 35kV". 20 times the cable diameter.
Again, the aluminum alloy cable has a low resilience and is 40% smaller than the resilience of the copper cable, which facilitates construction and reduces the risk of construction. Creep resistance, special alloys and heat treatment of aluminum alloy conductors greatly reduce the “creep†of the metal under heat and pressure. Change "tendency, compared to pure aluminum, increase creep resistance by 300%; high flame retardancy, aluminum alloy with chain armored cable using aluminum alloy conductor, flame-retardant silane crosslinked polyethylene insulation, aluminum alloy with chain armored Structure, able to achieve flame-retardant IA class, fire-resistant IA class, and low smoke and halogen-free; aluminum alloy armored cable uses non-magnetic materials, even if there is a three-phase unbalanced current, the cable will not generate eddy currents, reducing the loss of the line .
In addition, corrosion resistance is also a major advantage of highly conductive aluminum alloy cables. Aluminum rapidly forms an oxide film in the air with a thickness of approximately 2-4 μm. This oxide film is so dense that air cannot enter, thereby preventing further internal oxidation of the metal.
Finally, the installation is simple. The highly conductive aluminum alloy cable is more like a metal conduit and cable integration than a copper cable. In practical applications, the work of wearing pipes is eliminated. In the design of electrical design, bridges can be omitted, the cost can be reduced, man-hours can be saved, the construction period can be shortened, materials can be saved, and pollution and energy waste can be reduced.
Under the same current carrying capacity, the cross section of aluminum alloy conductor is 1.5 times of copper core cable: GB/T3956-2008 "Cable conductor" stipulates that at 20 °C, the DC resistance of a copper conductor cross section corresponds to another Specifications of aluminum conductor DC resistance value is equivalent; a specification of copper conductor core power cable can be replaced by a DC resistance equivalent aluminum conductor cable, this time the aluminum cable's ampacity is greater than the copper cable's ampacity; in the case of the same cross-section length Below, conductivity is 61% of copper, and the current-carrying capacity is about 78% of copper. According to the distribution of cable cross-sections, the section of the aluminum alloy cable is increased by about 1.5 times, and the electrical parameters such as current carrying capacity and voltage are equivalent to those of copper.
Under the same current-carrying capacity, the diameter of the aluminum alloy conductor is about 1.2 times that of the copper core conductor. Then, does the increase of the conductor diameter affect the installation? Firstly, the diameter of the aluminum alloy cable can be considered in the design; secondly, the conductor is used in the manufacture. Pressing technology, compression coefficient reached 0.93, so that the outer diameter of aluminum alloy cable is only increased by about 10% compared to the copper core cable, reducing the diameter factor to the minimum.
When the equivalent section length is the same, the weight of the aluminum alloy conductor is 50% of the copper core conductor: Since the difference between the two is larger, even if the aluminum alloy section increases, the weight of the conductor can be reduced because of the smaller specific gravity.
Secondly, high-conductivity aluminum alloy cable connectors perform well, greatly improving the toughness and high creep resistance after annealing. In practice, if the copper and aluminum are directly connected and contacted, there is a potential difference and electrochemical corrosion may occur even in moist air. In the power system, this kind of corrosion will increase the contact resistance, make the junction heat, and make the system run safely. Copper-aluminum joints manufactured using new technologies now fundamentally eliminate the fatal deficiency of copper and aluminum joints in the past, making the joints of aluminum alloy cables safe and reliable, and the operation is simple and convenient.
In order to better analyze the technical performance of highly conductive aluminum cables , this article describes the following dozens of aspects in order to allow people in the industry to better understand high-conductivity aluminum alloy cables and apply them to project practice.
In general, aluminum alloys are lightweight, equivalent to about 50% of the replacement copper cables. The length of aluminum alloy cables of the same quality is twice that of copper cables. For large-span buildings, 15% of the steel structure can be saved and smaller. The additional load can increase the safety of the building itself. At present, aluminum alloy cable products have successfully completed the actual installation and use of nearly 500 projects in residences, star hotels, hospitals, theaters, convention centers, libraries, government agencies, financial centers, petrochemicals, airports, and ships. It has been widely used in subway, iron and steel smelting projects.
First of all, it should be clear that the loss of electrical energy during transmission depends on the conductor resistance rather than the resistivity. Compared to copper conductors, aluminum conductors have a high resistivity. Many people have come to the conclusion that aluminum conductor cables have large losses during power transmission. It is unscientific to conclude that aluminum has a greater loss than copper.
Mechanical properties have also been improved: due to the addition of alloying elements such as iron, copper, and rare earth elements in pure aluminum, the overall performance of the aluminum alloy is improved, and the elongation and creep properties are improved. At the same time, alloying also increases the tensile strength of the aluminum alloy.
The elongation rate is increased to more than 25%, which greatly improves the bending performance. The minimum bending radius of the aluminum alloy cable installation is more than 7 times the cable diameter, which is far less than the minimum bending radius of the cable installed in GB12706-2008 "Excluding Insulated Power Cables and Accessories Rated Voltage from 1kV to 35kV". 20 times the cable diameter.
Again, the aluminum alloy cable has a low resilience and is 40% smaller than the resilience of the copper cable, which facilitates construction and reduces the risk of construction. Creep resistance, special alloys and heat treatment of aluminum alloy conductors greatly reduce the “creep†of the metal under heat and pressure. Change "tendency, compared to pure aluminum, increase creep resistance by 300%; high flame retardancy, aluminum alloy with chain armored cable using aluminum alloy conductor, flame-retardant silane crosslinked polyethylene insulation, aluminum alloy with chain armored Structure, able to achieve flame-retardant IA class, fire-resistant IA class, and low smoke and halogen-free; aluminum alloy armored cable uses non-magnetic materials, even if there is a three-phase unbalanced current, the cable will not generate eddy currents, reducing the loss of the line .
In addition, corrosion resistance is also a major advantage of highly conductive aluminum alloy cables. Aluminum rapidly forms an oxide film in the air with a thickness of approximately 2-4 μm. This oxide film is so dense that air cannot enter, thereby preventing further internal oxidation of the metal.
Finally, the installation is simple. The highly conductive aluminum alloy cable is more like a metal conduit and cable integration than a copper cable. In practical applications, the work of wearing pipes is eliminated. In the design of electrical design, bridges can be omitted, the cost can be reduced, man-hours can be saved, the construction period can be shortened, materials can be saved, and pollution and energy waste can be reduced.
Under the same current carrying capacity, the cross section of aluminum alloy conductor is 1.5 times of copper core cable: GB/T3956-2008 "Cable conductor" stipulates that at 20 °C, the DC resistance of a copper conductor cross section corresponds to another Specifications of aluminum conductor DC resistance value is equivalent; a specification of copper conductor core power cable can be replaced by a DC resistance equivalent aluminum conductor cable, this time the aluminum cable's ampacity is greater than the copper cable's ampacity; in the case of the same cross-section length Below, conductivity is 61% of copper, and the current-carrying capacity is about 78% of copper. According to the distribution of cable cross-sections, the section of the aluminum alloy cable is increased by about 1.5 times, and the electrical parameters such as current carrying capacity and voltage are equivalent to those of copper.
Under the same current-carrying capacity, the diameter of the aluminum alloy conductor is about 1.2 times that of the copper core conductor. Then, does the increase of the conductor diameter affect the installation? Firstly, the diameter of the aluminum alloy cable can be considered in the design; secondly, the conductor is used in the manufacture. Pressing technology, compression coefficient reached 0.93, so that the outer diameter of aluminum alloy cable is only increased by about 10% compared to the copper core cable, reducing the diameter factor to the minimum.
When the equivalent section length is the same, the weight of the aluminum alloy conductor is 50% of the copper core conductor: Since the difference between the two is larger, even if the aluminum alloy section increases, the weight of the conductor can be reduced because of the smaller specific gravity.
Secondly, high-conductivity aluminum alloy cable connectors perform well, greatly improving the toughness and high creep resistance after annealing. In practice, if the copper and aluminum are directly connected and contacted, there is a potential difference and electrochemical corrosion may occur even in moist air. In the power system, this kind of corrosion will increase the contact resistance, make the junction heat, and make the system run safely. Copper-aluminum joints manufactured using new technologies now fundamentally eliminate the fatal deficiency of copper and aluminum joints in the past, making the joints of aluminum alloy cables safe and reliable, and the operation is simple and convenient.
Fiberglass Grinding Force Control System
Fiberglass is a kind of material that we do not use or see often in daily life. But it is very common in industrial producing. considering its high requirements for its surface effect, and human labor is hard to realize the requirements and also it is not safe for human labor to do this job. So it only can ask help for industrial automation. Our Force Control System not only can do the job, but can ensure the surface effect to meet customer's requirement. We have done the tests for customer, and customer feels very satisfied with our result, that's why we are very confident in our product and that our product will help you reduce labor cost and improve producing efficiency alot.
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