The performance of aluminum alloy cable and aluminum core cable is different. The corrosion resistance of pure aluminum is better than that of copper, but the corrosion resistance of aluminum alloy is better than that of pure aluminum. Below we analyze the corrosion resistance, mechanical properties, electrical conductivity, creep resistance and other four aspects.
First, corrosion resistance
The corrosion resistance of pure aluminum is better than that of copper, but the corrosion resistance of aluminum alloy is better than that of pure aluminum, because the chemical elements such as rare earth added in the aluminum alloy can increase the corrosion resistance of the aluminum alloy, especially the electrochemical corrosion resistance. The problem of electrochemical corrosion of pure aluminum occurring at the joint for a long time is solved.
Second, mechanical properties
First, tensile strength and elongation. Compared with pure aluminum conductors, aluminum alloy conductors have added special components and adopted special processing techniques, which greatly improved the tensile strength and increased the elongation to 30%, making them safer and more reliable.
Second, the bending performance. The bending performance of the aluminum core cable is very poor, and the bending is easy to break. The bending radius of the aluminum alloy power cable is 7 times the outer diameter of the cable, which is far superior to the 10 specified in GB/T12706 "Minimum bending radius when installing cables". Times -20 times the outer diameter of the cable.
Third, flexibility can. As long as the pure aluminum cable is twisted at a certain angle for several times, the conductor will be cracked or broken, which is easy to cause an accident, and the aluminum alloy power cable can withstand dozens of bends, eliminating the accidents during the installation and use of the pure aluminum cable. Hidden dangers have greatly improved safety and reliability.
Third, the conductivity
The aluminum alloy conductor is an emerging conductor material formed by adding an element such as rare earth, magnesium, copper or iron to pure aluminum. It is well known that when a variety of other alloying elements are added to aluminum, the electrical conductivity is degraded, and by process control, the electrical conductivity can be restored to a level close to that of pure aluminum, so that it has a similar current carrying capacity as pure aluminum.
Fourth, creep resistance
Pure aluminum has poor creep resistance, and thermal expansion and contraction caused by energization and power failure will cause large creep at the joint. After a long time, slack will occur, contact resistance will increase and cause overheating, which may cause accidents. The creep resistance of AA8000 series aluminum alloy is 300% of pure aluminum conductor, which greatly reduces the possibility of cable joint slack and improves the connection of conductors.
Concerned about surprises
Label: Performance comparison between aluminum alloy cable and aluminum core cable
Previous: Did you choose the right hood? Next: CNC machine tool industry conforms to the market trend 6 major trends
Jack Nut,Jack Base Nut,Jack Handle Nut,Adjustable Jack Nut
J.B Machinery (Ningbo) Co., Ltd. , https://www.jbdrill.com