Electronic type current transformer

Abstract

The invention relates to an electronic type current transformer comprising an oil temperature compensator, a shell, a primary conductor, a secondary conductor, an insulating medium, an insulating strut, a conductive body, a support and a secondary output control box, wherein the primary conductor passes through an inner shield and extends out of the shell through a secondary winding; the insulating strut is arranged below the shell; and the secondary output control box is fixed on the support and connected with the secondary winding through the conductive body. The electronic type current transformer has the advantages that an electric filed is uniformly distributed because the shell is made of alloy aluminum and is similar to the secondary winding in shape; the skeleton in the secondary winding is provided with an expansion compensation groove for the skeleton to obtain the expansion compensation when the temperature rises and the pressure changes; the position of the ending head of the winding is symmetric to the position of the starting head when an enameled round copper wire is wound, and the winding is arranged in a shielding case so as to effectively enhance the capability for resisting the electric field disturbance of the winding and guarantee the measuring accuracy; and the weight is lightened and the generality of components and parts is enhanced because a magnetic induction iron core is eliminated and insulating oil is used as the insulating medium.

Description

technical field [0001] The invention relates to a current transformer used in the power industry, in particular to an electronic current transformer. Background technique [0002] After searching relevant patent documents, no electronic current transformer with the same structure as the present invention has been found. The existing high-voltage current transformers mainly include: oil-immersed current transformers and sulfur hexafluoride current transformers. Due to their structure, the existing oil-immersed current transformers and sulfur hexafluoride current transformers generally have iron cores , using electromagnetic induction to achieve the effect. Due to the use of iron cores, this type of current transformer has magnetic saturation and other phenomena, which makes its electromagnetic induction efficiency significantly lower. In addition to its large size, the overall equipment weight of the current transformer is significantly heavier. . my country's patent "New h...

AI Technical Summary

Problems solved by technology

my country's patent "New high-voltage combined independent electronic current and voltage transformer", patent number: 200720300527.1, discloses an electronic current and voltage transformer. Although this type of structure has significantly improved its efficacy, its weight has been significantly reduced. , but also due to its structure, it is difficult to obtain a uniform electric field distribution as a whole, so it is necessary to improve the existing electronic current transformer to better meet the actual needs

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