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Electrical performance. Because the electrical conductivity of aluminum is worse than that of copper, the DC resistance of the copper clad aluminum conductor is greater than that of the pure copper conductor. This has no effect mainly on whether the cable will be used for power supply, such as providing power to the amplifier if used for power supply. Copper-clad aluminum conductors will result in additional power consumption and more voltage drop. When the frequency exceeds 5 MHz, the AC resistance decay at this time is not significantly different between the two different conductors. Of course, this is mainly due to the skin effect of high-frequency currents. The higher the frequency is, the closer the current flows to the conductor surface. Actually pure copper material on the surface of the copper-clad aluminum conductor, when the frequency is high, the entire current plating Flowed in the copper material.
At 5 MHz, the current flows in a thickness of approximately 0.025 mm near the surface, whereas the thickness of the copper layer of the copper-clad aluminum conductor is approximately double that thickness. For the coaxial cable, the transmission effect of the copper-clad aluminum conductor and the pure copper conductor is the same because the transmitted signal is above 5 MHz. The attenuation of the actual test cable can prove this. The copper clad aluminum is softer than the pure copper conductor and can be easily straightened in the production process. Therefore, to a certain extent, it can be said that the copper clad aluminum cable is better than the cable with the pure copper conductor.
Economical. Copper-clad aluminum conductors are sold on a weight basis, and pure copper conductors are sold on a weight basis. Copper-clad aluminum conductors are more expensive than pure copper conductors of the same weight. But the same weight of copper clad aluminum is much longer than the length of pure copper conductor, and the cable is calculated by length. The same weight, copper clad aluminum wire is 2.5 times the length of the copper wire, the price is only a few hundred dollars more per ton. Combined, copper clad aluminum is very advantageous. As the copper-clad aluminum cables are relatively light, the cable transportation costs and installation and installation costs will be reduced, which will bring certain convenience to the construction.
For the electromechanical installation industry, wire and cable occupy an important position in the electromechanical installation project. As its main raw material, copper accounts for 70%~80% of the total cost of the cable product, and the price of copper cable increases rapidly as the price of copper increases. As a result, the investment and construction parties have brought great difficulties in project cost control. For this reason, the research and application of copper clad aluminum cables has grown rapidly.
The copper clad aluminum cable refers to the wire and cable that uses aluminum core wire instead of copper to become the main body of the cable and a certain percentage of copper layers outside. Copper clad aluminum cables can be divided into two categories based on their use: one is copper clad aluminum cable for signal or communication purposes, and the other is copper clad aluminum cable for power supply. With regard to its characteristics, the following comparisons are made between copper clad aluminum and pure copper cables.
Copper Clad Aluminum Communication Cable
Mechanical properties. Pure copper conductors have higher strength and elongation than copper-clad aluminum conductors, which means that pure copper has better mechanical properties than copper clad aluminum. From the perspective of cable design, pure copper conductors have better mechanical strength than copper-clad aluminum conductors, and are not necessarily needed in practical applications. The copper clad aluminum conductor is much lighter than pure copper, so the copper clad aluminum cable is lighter in weight than the pure copper conductor cable, which will facilitate the cable transportation and cable construction. In addition, copper clad aluminum is softer than pure copper. Cables produced from copper-clad aluminum conductors are somewhat softer than pure copper cables.
Copper clad aluminum cable body
Copper clad aluminum cable body