The use of low pressure armored cables
1, corrosion resistance: aluminum inherent corrosion resistance margin when the aluminum surface and air contact to form a thin and strong oxide layer, this oxide layer is particularly resistant to various forms of corrosion. And the addition of rare earth elements in the alloy can further improve the corrosion resistance of aluminum alloys, especially electrochemical corrosion. Aluminum can withstand the harsh environment of the characteristics of its widely used in the tray cable conductor, Low Voltage Armoured Cable as well as many industrial components and containers. Corrosion is usually associated with the connection of different metals in humid environments, and protective measures can be used to prevent corrosion, such as the use of lubricants, antioxidants and protective coatings. Alkaline soils and certain types of acidic soils are highly corrosive to aluminum, so aluminum conductors laid in direct burial should be made of insulating or molded sheaths to prevent corrosion. In sulfur-containing environments, Low Voltage Armoured Cable such as railway tunnels and other similar places, the corrosion resistance of aluminum alloys is much better than that of copper.
2, conductive properties: aluminum alloy conductivity is the most commonly used reference material copper IACS 61.5%, carrying capacity is 79% of copper, better than pure aluminum standard.
3, the tensile strength and elongation: aluminum alloy conductor compared to pure aluminum conductor, Low Voltage Armoured Cable due to the addition of special ingredients and the use of a special processing technology, greatly improving the tensile strength, and elongation increased to 30% Use more secure and reliable.
4, self-weight bearing capacity: aluminum alloy to improve the tensile strength of pure aluminum, aluminum alloy cable can support the length of 4000 meters of weight, copper cable can only support 2750 meters. This advantage in the long-span buildings (such as sports venues) wiring is particularly prominent.
5, thermal expansion coefficient: thermal expansion coefficient used to calculate the temperature changes in the material size changes. Aluminum alloy thermal expansion coefficient and copper quite, Low Voltage Armoured Cable over the years the aluminum connector has been reliably used for copper and aluminum conductors, and most of today's electrical connectors are made of aluminum, which is particularly suitable for aluminum. So the aluminum alloy conductor and connector expansion and contraction exactly the same.
6, creep resistance: aluminum alloy alloy alloy material and annealing process to reduce the conductor in the heat and pressure under the "creep" tendency, relative to pure aluminum, Low Voltage Armoured Cable creep resistance increased by 300%, to avoid the cold Or creep-induced relaxation problems.
7, armor characteristics: domestic commonly used low-voltage armored cable, mostly with steel armor, low security level, in the external destructive power, its poor resistance, easily lead to breakdown, and heavy weight, the installation cost is quite high , Coupled with poor corrosion resistance, the service life is not long. And we developed according to the US standard metal chain low-voltage armored cable, aluminum alloy with a chain armor, the layer between the layer and the structure to ensure that the cable can withstand strong external destructive power, even if the cable suffered a larger Pressure and impact force, the cable is not easy to breakdown, improve the safety performance. At the same time armored structure to isolate the cable from the outside, even in the fire, the armor layer to improve the flame retardant fire level, reducing the risk of fire. Low Voltage Armoured Cable Aluminum alloy armored structure relative to the steel armor, its light weight, laying convenience, can be installed without bridge, can reduce the installation costs of 20% to 40%. Depending on the location of use, you can choose a different outer jacket layer, Low Voltage Armoured Cable so that the use of low-voltage armored cable more widely.
8, pressing characteristics: from the volume of conductivity considerations, aluminum alloy less than copper, but we developed the conductor not only from the material performance has been improved, but also in the process also made a big breakthrough, we use the extraordinary pressure Technology, so that the compression factor to 0.93, and the special line of the compression factor can reach 0.95, is the first in the country. Through the maximum limit of the pressure, can make up for the lack of aluminum alloy in the volume conductivity, so that stranded conductor core, such as solid conductor in general, significantly reduce the core diameter, improve the conductivity, in the same load conditions outside the conductor Diameter only 10% larger than copper.
9, flexibility: aluminum alloy has a good bending performance, its unique alloy formula, processing technology, so that a substantial increase in flexibility. Aluminum is 30% higher than copper flexibility and 40% less resilient than copper. General copper bending radius of 10 to 20 times the outer diameter, while the aluminum alloy cable bending radius of only 7 times the outer diameter, easier to connect the terminal.