Method for reducing partial heating of transformer shell

Abstract

The invention relates to a method for reducing partial heating of a transformer shell, aiming at solving the problems that a low-voltage side of the transformer shell is not made of a non-magnetism-conducting material so that overheat at the peripheries of a flange under a low-voltage sleeve and an ascending flanged base of the low-voltage side is caused by eddy-current loss when large current flows through the low-voltage side. The method is characterized in that according to a parallel circuit current diffusion principle, the current of a branch circuit with large resistance is small and the current of a branch circuit with small resistance is large; a short-circuit copper bar is additionally arranged at the periphery of a partial overheating part in the low-voltage ascending flanged base of the transformer shell to form a loop, so as to lead eddy current to the short-circuit copper bar which has smaller resistance and does not conduct magnetism; the copper bar is grounded so that the eddy-current loss is reduced and the temperature of an overheat point of the transformer shell is reduced. The heat dissipation effect is good, the construction is convenient and the cost is low; a detachable short-circuit copper bar structure is adopted so that the work including normal maintenance and overhauling and the like of a transformer is not influenced.

Description

technical field [0001] The invention relates to electrical equipment technology, in particular to a method for reducing local heating of a transformer shell. Background technique [0002] A transformer is a device that uses the principle of electromagnetic induction to change the AC voltage. It will generate a lot of heat during its operation. For transformer products, the most effective heat dissipation design in the prior art is the heat dissipation design of the shell. For example, the patent announcement number is CN204270788U , a common transformer housing is proposed. There are multiple heat sinks fixed on the outer periphery of the box, and all the heat sinks are arranged in parallel. For example, the patent announcement number is CN203288385U, a heat dissipation mechanism of a transformer shell is designed, which has a partition plate, a frame is installed on both sides of the upper end of the partition plate, and feet are installed on both sides of the lower end of ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of overheating of the lower flange of the low-voltage bushing and the periphery of the rising seat on the low-voltage side caused by eddy current loss when the low-voltage side passes a large current because the low-voltage side of the transformer shell does not use non-magnetic materials, and provides a A reasonable process, simple operation, guided method with obvious cooling effect to reduce local heating of the transformer shell

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