Current transformer insulation wrapping method and current transformer

Abstract

The invention provides an insulation wrapping method for a current transformer. The insulation wrapping method for the current transformer comprises the following steps: soaking cable paper; wrapping, wherein in a wrapping process, the wetted cable paper is heated to 100 to 110 DEG C and wrapped, so that water inside the cable paper can be removed when the cable is wrapped, and insulation wrapping is compact and reliable; stuffing a voltage-equalizing electric screen between the wrapped cable paper, continuously wrapping and continuously repeating the above action until the whole cable paper is wrapped, wherein the voltage-equalizing electric screen needs to be stuffed into an insulation wrapping structure. A method for wrapping the whole cable paper is adopted, and the water is removed by heating in the wrapping process, so the early-stage preparation time is reduced, the problem that the cable paper is easy to break in the wrapping process caused by cutting of the cable paper is avoided, the problem that bubbles are generated between wrapping layers is also avoided, and the product quality of current transformer insulation wrapping is improved. The invention also provides the current transformer.

Description

technical field [0001] The invention relates to the technical field of current transformers, and more specifically, relates to an insulation wrapping method for a current transformer and a current transformer. Background technique [0002] At present, the insulation wrapping of the known oil-immersed current transformers is wrapped with half-fold cable paper with a width of 20mm. Before wrapping, the cable paper needs to be soaked and dried in the shade before wrapping. The cable paper is easy to break and foam during the wrapping process, and it is easy to generate air bubbles in the layer insulation, which affects the product quality. At the same time, after the cable paper is soaked, its water content increases, and the drying process time of the product needs to be extended relatively, which increases the product cost. [0003] At the same time, when the oil-immersed current transformer is in use, when the half-stacked cable paper is not in place, the insulating paper w...

AI Technical Summary

Problems solved by technology

[0002] At present, the insulation wrapping of the known oil-immersed current transformers is wrapped with half-fold cable paper with a width of 20mm. Before wrapping, the cable paper needs to be soaked and dried in the shade before wrapping. The cable paper is easy to break and foam during the wrapping process, and it is easy to generate air bubbles in the layer insulation, which affects the product quality

At the same time, after the cable paper is soaked, its moisture will increase, and the drying process time of the product needs to be extended relatively, which will increase the product cost.

[0003] At the same time, when the oil-immersed current transformer is in use, when the half-stacked cable paper is not in place, the insulating paper will easily slide down along the surface of the aluminum tube, resulting in discharge along the surface, which will affect the operational reliability of the current transformer.

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