Introduction to the basic performance indicators of the aluminum alloy cables used by Kinghelm

golden navigation markkinghelm company (www.bds666.com)golden navigation markkinghelmElectronics is a major integrating development, design, manufacturing and marketingBeidouGPSAntenna RF MicrowaveconnectorR&Dmanufacturing company,Golden Navigation ProductsThere is BeidouProducts such as GPS antenna positioning navigation antenna, RJ45 network connector interface, RF microwave adapter connector, coaxial cable connector, type-c connector interface, HDMI interface terminal, SMA adapter pin header, FPC cable FFC antenna, HDMI interface USB connector and other products are now being launched for customers. Kinghelm's customized non-standard connector adapter cables and wires and other products. Now I will introduce to you the frequently used Golden Navigation Products.Aluminum alloy cable。

1 .Core compression coefficient

There are certain differences between aluminum alloy cables and traditional power cables in terms of process structure and auxiliary materials. The conductors of aluminum alloy cables use aluminum alloy monofilament compaction and stranding, and their core compression coefficient reaches97%, the conductor is very dense, and the difference can be clearly seen in the conductor cross-section compared with traditional copper core cables and aluminum core cables (the compression coefficient of the wire core can only reach about 82% due to the traditional cable manufacturing process).

2 .Flexibility
    Aluminum alloy cables useAA-8000 series aluminum alloy wire is controlled by adding appropriate amounts of copper (Cu), iron (Fe), magnesium (Mg), zinc;... and rare earth aluminum intermediate alloy materials. It is a high-tech new environmentally friendly and energy-saving power cable developed through a special synthetic annealing process. Its conductor flexibility is super strong. This super flexibility ensures that the safety performance of aluminum alloy cables in practical applications reaches or even exceeds that of copper core cables. It also brings great advantages to the actual installation and application of aluminum alloy cables. In the actual inspection and judgment, direct hand folding test can show that the aluminum alloy conductor is very flexible and can be folded repeatedly or wound repeatedly like a rope. The aluminum alloy monofilament is destructively folded violently. The experimental conclusion requires at least 18 round trips to cause cracks or fractures, while ordinary aluminum core monofilaments Generally, cracks will appear after folding three times, and will definitely break after five folds. An important disadvantage of ordinary aluminum wire is its high brittleness. As long as it is twisted at a certain angle during installation, the conductor will crack, and the crack will heat and corrode, which is an important cause of fire. This is also the fatal reason why it cannot be widely used.

3 .Cable structure
  The core of the aluminum alloy cable is tightly pressed and stranded, and the conductor cross-section is a round core.(Traditional cable cores are mostly fan-shaped). The insulation adopts three-color co-extruded cross-linked polyethylene insulation technology. The cores are arranged regularly and the entire cable is round and flexible.

4 .Wire core glossy
   Due to the optimization of the conductor crystal result by the rare earth alloy materials added during the smelting process, the aluminum alloy conductor has a bright core cross-section with high brightness, which has obvious sensory differences from traditional aluminum core cables.

5 .Creep properties
  The creep properties of alloy conductors are basically the same as those of copper core conductors. Through experiments, it is known that the yield strength of copper is6.0, alloy conductor is 5.4, which is basically the same as copper conductor and 300% of aluminum core conductor.

6 .Extended performance
   Elongation is an important indicator of the mechanical properties of a conductor and an important indicator of the quality of the product and the amount of external force it can withstand. It is also an important indicator for testing the mechanical properties of cable conductors. The elongation rate of aluminum alloy cables after annealing treatment can reach30%, while the elongation rate of copper cables is 30%, and the elongation rate of ordinary aluminum rods is 15%, which are important indicators that can replace copper cables.

7 .tensile strength
    Aluminum alloy conductors are only half of copper conductors(113.8: 220MPa), since the density of aluminum alloy is only 30.4% of that of copper conductor, under the premise of the same electrical performance, even if the cross-sectional area of ​​aluminum alloy conductor is increased to 150% of that of copper conductor, the weight of aluminum alloy conductor is only 45% of copper conductor, which makes the tensile strength of aluminum alloy conductor still have certain advantages over copper conductor. In long-span power projects, due to its specific gravity advantage, its tensile strength advantage is particularly prominent under equivalent conditions. It not only saves a large amount of bridges and reduces the labor intensity of the installation engineers, but also speeds up the installation process, saves the construction period, and greatly reduces the overall installation cost.

8 .Anti-corrosion properties

    Aluminum alloy conductors themselves have excellent corrosion resistance. The good corrosion resistance of aluminum alloy conductors comes from the inherent anti-corrosion properties of aluminum. When its surface comes into contact with air, a layer with a thickness of aboutA dense oxide film of 2 to 4 μm. This oxide film is very dense and particularly resistant to various forms of corrosion. Therefore, it has the characteristics of withstanding the harshest environments. Its actual service life is more than 10 years longer than that of copper cables. (Referring to the actual usage abroad, judging from the current usage time of 40 years in European and American countries, its actual service life is more durable than copper cable)

 9 .Electrical properties
  The resistivity of aluminum alloy is between aluminum and copper, slightly higher than aluminum and lower than copper. Under the premise of the same interception capacity, the weight of an aluminum alloy conductor of the same length is only half that of copper. If the conductivity of copper is100% calculation, the conductivity of the alloy conductor is about 62.5%, the specific gravity of the alloy is 2.7, and the specific gravity of copper is 8.9, then (8.9/2.7)×(0.612/1)=2, that is, 2 units The resistance of one unit weight of copper is the same as that of 1 unit mass of the alloy. Therefore, when the cross-sectional area of the alloy conductor is 1.5 times that of copper, its electrical properties are the same, that is, the same interception, resistance, and voltage loss as copper are achieved.

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golden navigation markKinghelm (www.bds666.com) has a new range of productsUsed in mobile phone microphone motors, household appliances, smart furniture, lighting electronics, electrical and electronics, security equipment, hardware tools, mechanical equipment, automotive electronics, testing instruments, network communications, new energy,There is also a small part foraerospaceaviationand other fields.