A method of manufacturing a rectangular conductor with a large ampacity and a low temperature rise

Abstract

The invention discloses a rectangular conductor. A body oxide layer (the oxide layer is very thin with little resistance) retaining copper and aluminum alloy is proposed to act as an isolation layer to prevent electrochemical reaction. The copper and the aluminum alloy (such as aluminum and magnesium alloy and rare earth aluminum alloy) are combined through overlapping. By splitting of the isolation layer, the copper and the aluminum alloy form two relatively separate conductors but equal in potential without generation of electromagnetic interference between each other, and a uniform effect of current density distribution is greatly increased. The rectangular conductor is suitable for buses and transformers at various voltage levels.

Description

technical field [0001] The invention relates to a rectangular conductor suitable for busbars of various voltage levels and conductors of transformers. Background technique [0002] In order to increase the ampacity and reduce costs in the existing busbar and transformer conductor industries, copper-clad aluminum bars, multi-split copper or aluminum busbars have been proposed. However, a more effective way to reduce costs and increase carrying capacity has not been found. The conductors of the above-mentioned series of products are copper, aluminum, copper-clad aluminum, and copper-aluminum conductors with insulation and isolation. The disadvantages are: [0003] ①The copper carrying capacity is small, the temperature rises, and the cost is high. [0004] ② The current carrying capacity of aluminum is small, the temperature rises, the conductivity of aluminum is relatively poor compared to copper, and it is easy to oxidize. [0005] ③ Copper-clad aluminum has a small curre...

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Problems solved by technology

[0003]①The copper carrying capacity is small, the temperature rises, and the cost is high

[0004]②The current carrying capacity of aluminum is small, the temperature rises, the conductivity of aluminum is relatively poor compared to copper and it is easy to oxidize

[0005]③ Copper-clad aluminum has small current carrying capacity, high temperature, complex copper-clad aluminum process, and is a metallurgical combination (the use of copper and aluminum in the prior art must be a metallurgical combination , otherwise there is an electrochemical reaction), the adhesion of copper and aluminum is that copper and aluminum are not layered, they are a whole, and the current density distribution is uneven

Compared with copper-clad aluminum bars with equal cross-section, the copper-clad aluminum bars have a larger carrying capacity than copper-clad aluminum bars, and the waste copper-clad aluminum bars are being recycled. The copper-aluminum separation process is complicated and the pollution is serious.

[0006]④ Disadvantages of multi-split copper or aluminum bus bars: small carrying capacity, high temperature, insulation between copper and aluminum, and the electrochemical reaction of copper and aluminum is solved, but Copper and aluminum are two independent conductors with unequal potential. The electromagnetic fields between the two conductors interfere with each other and reduce the carrying capacity of each other.

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