Aluminum pipe structure for oil immersed type current transformer

Abstract

The invention discloses an aluminum pipe structure for an oil immersed type current transformer, which belongs to the technical field of current transformers. The aluminum pipe structure of the oil immersed type current transformer is U shaped. The bottom of the U-shaped aluminum pipe structure is wider than a top opening of the U shape; the aluminum pipe structure is formed by connecting four wire rods together by using tenons; and each wire rod has a 1 / 4 circular ring cross section. The invention has the advantages that shaping is carried out by special equipment, and then insulation wrapping is carried out; insulation damage and short circuit among turns cannot be caused by the shaping; the dimension error is very small, and larger merged dimensional deviation does not exist; the mechanical strength is high and the movement resistance and thermal stability resistance are good; the internal connection of a primary winding is mechanical connection so that the welding problem does not exist; the cost is lower and the economic value is considerable and the like.

Description

technical field [0001] The invention belongs to the technical field of current transformers, in particular to an aluminum tube structure of an oil-immersed current transformer. Background technique [0002] The transformer is one of the indispensable important equipment in the power system transmission and distribution project. According to the different cooling medium, it is divided into oil-immersed transformer, dry-type transformer, and transformer with sulfur hexafluoride as the main insulating medium. The oil-immersed current transformer uses transformer oil as the heat dissipation medium. The heat generated during operation is transmitted from the transformer oil to the metal shell and dissipated. It has the characteristics of fast heat dissipation, uniform conduction, and recoverable insulation. The product structure is simple and easy to manufacture. And reliable operation, electrical performance can meet the requirements of the power system. Therefore, oil-immersed...

AI Technical Summary

Problems solved by technology

The following problems exist in the actual use of multi-turn copper wires: the insulation paper is easily damaged when the primary winding of the multi-turn copper wire is reshaped, resulting in a short circuit between turns, and the size deviation is large due to the large size error of the combined insulation paper tubes during the main insulation wrapping

Poor mechanical strength, poor anti-motion and thermal stability; difficult internal welding of the primary winding; high copper wire price and uneconomical

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