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Prospects for the aluminum cable to good
时间:2014-07-16   点击:(3573)

Copper and aluminum cable industry continues to struggle for many years, especially in the high copper prices, a sharp decline in profit margins in the case of cable manufacturing, copper or aluminum section is the voice of aluminum and copper are particularly high. But for copper to aluminum section if it works but it is its own argument. Some in Europe as an example, to prove the reliability of aluminum cable; while on the other hand it in by other evidence, to explain the presence of aluminum and copper cable only some differences. Therefore, the dispute has been difficult to separate the copper and aluminum level, the development of aluminum cable has also been stalled. 
 
By 2006, the State Quality and Technical Supervision and the Ministry of Construction issued a "residential construction design specifications," can be said to aluminum cable poured cold water on, in the section on Electric's "residential construction design specifications", the clear emergence of the wire should be used copper requirements. Since then, copper cable continues to prevail, while the aluminum section copper industry has become a kind of appeal, but failed to have policies escort. 
 
However, this situation changed in recent finally happened. Recently, in the wire and cable Summit national quality inspection center and the Anhui provincial government jointly organized by the Ministry described for aluminum cable is the name, the Ministry said it would actively guide enterprises to key technologies, cutting-edge technology and basic technology research, through technology innovation to accelerate industrial restructuring. Promote natural cross-linking cables processes, promote circulation cooled or air-cooled technology, accelerate the development and utilization of renewable silane crosslinked ethylene-propylene rubber cable development, silane XLPE insulated cable efficient equipment. 
 
And in a recent seminar in copper aluminum sections, the Ministry and the National Development and Reform Commission has said it will expand the aluminum used in the power industry, and thus replace copper. It is reported that aluminum alloy for wire cables at low buildings, structures and ancillary facilities to support other occasions can be a lot of use. In order to alleviate high copper prices caused by the domestic cable industry product price is high, the problem of low profit margins. According to data provided by the Ministry of Industry, 2012, the domestic wire and cable industry gradually increased the amount of copper, of which the amount of copper grid industry with more than 5 million tons, accounting for more than 60 percent of domestic copper consumption. Thus, aluminum cable technology as well as copper clad aluminum technology will usher in the next great development, for the development of the entire cable industry driven perhaps contributed. 
 
The reason that the copper conductor and aluminum conductor cables have so big differences, in fact, a large part of the reason is that sellers of copper and aluminum sales side, not all from the perspective of the development of the cable industry's consideration. Copper development, manufacture and sale of the cable industry, naturally, want more choice of copper, on the contrary, aluminum, development, manufacture and marketing side but also want to use aluminum cable industry. But for the cable industry, the kind of material stable performance, low cost, natural selection is being fundamental conditions. 
 
From a cost perspective, aluminum prices will naturally be much lower than copper, so the key problem lies in the performance comparison between the two. As the proportion of copper is 8.96 g / cc, an aluminum (2.7 g / cc) of 3.65 times, while the resistivity of the copper 0.01851Ωmm2 / m, an aluminum (0.0294Ω "mm2 / m) of 63%, according to national recommended standard, at 20 ℃, a DC resistance of the corresponding section of a large two specifications of the aluminum copper equivalent, in theory, aluminum as a raw material than copper wires and cables cost more. 
 
In practical applications, due to volume requirements of the winding wire is relatively high, the substitution of aluminum to copper is not obvious; but in the field of power lines and communication lines, they have more serious situation. RF signal transmission field, CCA (CooperCladAluminum, copper clad aluminum) material substitution capability for copper is quite strong. Copper clad in aluminum or aluminum alloy core material surface concentric steel coated copper layer, according to the specifications of different copper weight accounted mainly between 15% -25%. Since the high-frequency signal transmission skin effect, the surface of the copper layer in the cable signal is transmitted over 0.008mm inner copper clad aluminum conductor to fully meet the requirements of signal transmission, the signal transmission characteristics of which are the same as the diameter of the copper wire body coincide. 
 
With aluminum as well as aluminum and copper cable technology continues to optimize the recent years, its performance has been greatly improved. Here, the market is more mature and widespread copper clad aluminum power cables and electrical wire and cable equipment, for example, we see advantages are clear.

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