Cable varieties which strong advantage more - copper clad aluminum cable Wire and cable

Cable varieties which the strong advantage of copper clad aluminum cable sent to much cable varieties which the strong advantage of copper clad aluminum cable zhdljyw much aluminium alloy wires with flexural, compressive creep and corrosion resistance and other physical and mechanical properties, especially due to its can save cost, stronger than general cable economy, so widely used. But high technical content, aluminum alloy cable production equipment investment is big, need to have a mature material formula, production technology and talent. Aluminium alloy conductor material production need patent formula, need smelting and rolling, to ensure that the quality of the alloy material. Cable production still need multi-channel anneal production process requirement, to specialized technology, mature technology, specializing in the production and management personnel, a dedicated production equipment complete, can produce qualified alloy cable products. High industry threshold, no mature professional, do not have the strength and production conditions of the factory is difficult to participate in. Aluminum alloy cable benefits, copper clad aluminum cable does not lose to it. For cable industry, as its main raw materials of copper, accounts for the total cost of the cable products % ~ %, in recent years, the price of copper cables with copper prices rose sharply, to the construction of the investors and brings great difficulties in the project cost control, therefore, research and application of copper clad aluminum cable to grow rapidly. Copper clad aluminum wire refers to replace the copper with aluminum conductor become the subject of cable outer bread a percentage of the copper wire and cable. Copper clad aluminum cable with respect to its purposes, basic can be divided into two kinds: one kind is the copper clad aluminum cables for power supply, another kind is signal or copper clad aluminum cable communication purpose. With respect to its characteristics of copper clad aluminum and pure copper cable to the following comparison. First, in terms of material performance, pure copper conductor strength, elongation, larger than the copper clad aluminum conductor is pure copper in mechanical performance is better than copper clad aluminum. From the perspective of cable design, pure copper conductors than copper clad aluminum conductor mechanical strength good advantages, in the process of practical application does not necessarily need to. Copper clad aluminum conductor, much lighter than pure copper, so copper clad aluminum cable on the overall weight is lighter than pure copper conductor cable, this will give the transport of the cable and cable erection construction convenient. Second, in terms of electrical performance, because of poor conductivity than copper, aluminum for copper clad aluminum conductor dc resistance than pure copper conductor, this presence of influence mainly to see if the cable is with power supply, such as supplies power to the amplifier, if be used to power supply, copper clad aluminum conductor will lead to additional power consumption, voltage lower more. When more than MHz frequency, at this time of ac resistance attenuation under the two different conductor has no significant difference between the two. Of course, this is mainly because the skin effect of high frequency current, the higher the frequency, the flow of electric current is more close to the conductor surface, on the surface of copper clad aluminum conductor in pure copper material, at some point when the frequency is high, the current to flow in copper plating quality inside. In MHz cases, the current in the near surface. Mm thickness, the thickness of copper and copper clad aluminum conductor thickness is about twice as many than that. For coaxial cable, because the signal transmission is above MHz, so the copper clad aluminum conductor and pure copper conductor transmission effect is the same. In the actual test the attenuation of the cable to prove it. Third, from the aspects of economy, copper clad aluminum conductor are sold by weight, of pure copper conductor is sold by weight, the price of copper clad aluminum conductor is more expensive than the same weight of pure copper conductor. But the same weight of copper clad aluminum conductor length is much longer than pure copper, and is calculated on the length of the cable. The same weight of copper clad aluminum wire is copper wire length. Times, the price is just more than a few hundred yuan per ton. Comprehensive, copper clad aluminum would be advantage. Because of the copper clad aluminum cable comparatively light, and the transportation cost of the cable, erectness cost will be reduced, can bring certain convenience to construction. Fourth, copper clad aluminum cable compared with pure copper cable, easy maintenance, lower maintenance costs. Use of copper clad aluminum can reduce the network failure, avoid network personnel during maintenance 'cut cut core in winter, summer skin' ( Aluminum or aluminum tube with longitudinal bag products) 。 Due to the copper aluminum inner conductor and outer conductor of the cable thermal expansion coefficient is large, in the hot summer, aluminum outer conductor for large, copper inner conductor relative retraction, not fully come into contact with the elastic contact within F head block; Outside in the cold winter, aluminum conductor shrinkage is larger, the shield falls off. When in the coaxial cable with copper clad aluminum conductor, it differ with aluminum outer conductor thermal expansion coefficient is small, the temperature changes, greatly reduced the cable core pulling fault, improve the quality of the network transmission. In addition, wire and cable industry with copper clad aluminum wire can also alleviate the pressure of the enterprise procurement, aluminium wire outside the bread a layer of copper by the control of double wire, because with a small specific gravity, as well as good transmission performance, particularly applicable to do the inner conductor of the coaxial cable of the radio frequency, compared with pure copper wire, its density is about pure copper %. And transfer characteristic is better than that of pure copper wire, is the ideal of the coaxial cable of the radio frequency branch line of inner conductor. As the copper clad aluminum cable performance advantages, coupled with the development of aluminum alloy cable, for the next few years will undoubtedly play a promoting role in the development of wire and cable.