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Differences In Performance Between Copper Clad Aluminum Cable And Pure Copper Cable
- Feb 19, 2018 -

In recent years, with the appearance of copper clad aluminum cables, the original expensive pure copper cable prices have become more populist, which in some sense to promote the development of China's wire and cable industry. The copper clad aluminum is in the aluminum or the aluminum/steel alloy core material surface concentric cladding copper layer, pulls out and becomes, the copper layer thickness is above 0.55mm. Copper clad aluminum cable and pure copper cable in the performance of what difference, what are the advantages, and what are the deficiencies?


In mechanical properties, pure copper conductor strength, elongation than copper clad aluminum conductor, which means that pure copper in mechanical properties than copper clad aluminum. From the point of view of cable design, pure copper conductor has better mechanical strength than copper clad aluminum conductor, which is not necessary in the practical application process. Copper clad aluminum conductor lighter than pure copper, so the copper clad aluminum cable in the overall weight than pure copper conductor cable to light, which will give cable transport and cable erection and construction of convenience. In addition, copper clad aluminum is softer than pure copper, the cable produced by copper clad aluminum conductor is better than pure copper cable in softness.


In electrical properties, because the conductivity of aluminum than copper, so that copper clad aluminum conductor DC resistance than pure copper conductor larger, this has no effect on whether the cable will be used to power. When the frequency exceeds 5MHz, there is no obvious difference between the two different conductors at this time. Of course, this is mainly because of the skin effect of high-frequency currents, the higher the frequency, the flow of the current is closer to the conductor surface, in the copper clad aluminum conductor surface is actually pure copper material, when the frequency is high to a certain time, the entire current plating in the copper material flow. In 5MHz cases, the current flows in about 0.025 mm thickness near the surface, while the copper clad aluminum conductor is about one times thicker than this thickness. For coaxial cable, because the transmission signal is above 5MHz, so the copper clad aluminum conductor and pure copper conductor transmission effect is the same. The attenuation of the actual test cable can prove this.


From the economic aspect, the copper clad aluminum conductor is sold by the weight, the pure copper conductor is also by the weight sale, the copper clad aluminum conductor's price is more expensive than the same weight pure copper conductor. But the same weight of copper clad aluminum is much longer than the pure copper conductor length, and the cable is calculated by length. The same weight of copper clad aluminum cable is 2.5 times times the length of copper wire, the price is only hundreds of yuan per ton. Combined, the copper clad aluminum cable has an advantage. As the copper clad aluminum cable produced by Asia Cable is lighter, the transportation cost of cable and installation and erection cost will be reduced, which will bring some convenience to the construction.


Copper clad aluminum Cable is also a good way to relieve the pressure of the current enterprise, aluminum wire outside a layer of copper through the pull system of bimetal wire, due to the small proportion, good transmission performance, especially for RF coaxial cable in the inner conductor, compared with pure copper wire, its density of 40% or so. The transmission characteristic is superior to pure copper wire, and is the ideal conductor of RF coaxial cable branch line.