Coil assembly of current transformer and production process thereof

Abstract

The invention relates to a coil assembly of a current transformer. The coil assembly comprises two superimposed coil windings. Each coil winding comprises a main ring iron core, a first insulation layer wrapped on the main ring iron core, a coil wound on the first insulation layer, a compensating ring iron core arranged inside the coil, a second insulation layer wrapped on the compensating ring iron core and a third insulation layer wrapped on the coil. The two coil windings are wrapped by a sponge layer. The sponge layer is wrapped by a fourth insulation layer. Incoming leads of the two coil windings are connected to form a wire incoming end; and outgoing leads of the two coil windings are connected to form a wire outgoing end. The wire incoming end and the wire outgoing end pass through the sponge layer and the fourth insulation layer in sequence and are exposed out of the fourth insulation layer; and the wire incoming end and the wire outgoing end are provided with an incoming copper insert and an outgoing copper insert respectively. The coil assembly has the advantages of simple structure, stable and reliable performance, low production cost and high qualified rate.

Description

technical field [0001] The invention relates to a current transformer, in particular to a coil assembly and a production process of the current transformer. Background technique [0002] A current transformer is an instrument that converts a large current on the primary side into a small current on the secondary side for measurement based on the principle of electromagnetic induction. A current transformer consists of a closed core and windings. The current transformer includes a transformer body and a coil assembly arranged in the transformer body. The structure design of the coil assembly of the existing current transformer is unreasonable, the production process is cumbersome, the labor intensity of the workers is high, the production efficiency is low, and The current transformer designed with this structure has a low conversion ratio pass rate of about 60%, and the product pass rate is low, resulting in the defects of high production cost and low pass rate of the curre...

AI Technical Summary

Problems solved by technology

The current transformer includes a transformer body and a coil assembly arranged in the transformer body. The structure design of the coil assembly of the existing current transformer is unreasonable, the production process is cumbersome, the labor intensity of the workers is high, the production efficiency is low, and The current transformer designed with this structure has a low conversion ratio pass rate of about 60%, and the product pass rate is low, resulting in the defects of high production cost and low pass rate of the current transformer.

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