Novel single-side self-adhesive enameled replacement lead

Abstract

The present invention relates to a novel single-layer self-sealing lacquer transposed cable which is mainly used for the large-scale electric power transformer winding. Two rows with broad faces contacting with each other are combined a certain number of enameled copper flat wires (1). The upper part and the lower part of two rows of enameled copper flat wire (1) do transposition with a same rotating direction along the narrow surface. The broad surface (b) of the enameled copper flat single wire (1.1) at the contacting part of the broad surface of two rows of enameled copper flat single wire (1) is coated with self-adhering epoxy resin paint. The narrow surface (a) of the enameled copper flat single wire (1.1) is not coated with self-adhering epoxy resin paint. As the surface of the enameled copper flat wire is coated with self-adhering epoxy resin paint with better self-adhering power, the invention is coiled as easy as the routine transposition conducting wire in the coiling process of the winding because of the non-adhering of the self-adhering lacquer. In the drying process of the winding and under the function of the temperature and pressure, the self-adhering resin paint is melted, bonded and solidified for pasting a plurality of transposition single wire to a whole arranged with breadth and phase. Thereby not only the mechanical strength of the winding is maintained, but also the heat radiating capacity is increased.

Description

technical field [0001] The invention relates to a transposition wire, in particular to a novel single-side self-adhesive enamelled transposition wire. Mainly used for large power transformer windings. Background technique [0002] The windings of oil-immersed power transformers are generally made of copper wires, which are wrapped with insulating layers. As the capacity of the transformer increases, the operating current also increases accordingly. Therefore, the cross-sectional area of ​​the winding wire is also increasing. The increase in the cross-sectional area of ​​the winding wire not only brings certain difficulties to the winding of the transformer winding, but also increases the eddy current loss. If a wire with a large cross-sectional area is divided into multiple strands and connected in parallel to wind a transformer coil, because the magnetic field position of a single wire and the length of the wire are different, it is difficult to equalize the induced elec...

AI Technical Summary

Problems solved by technology

The characteristics of the transposed wire increase the mechanical strength of the transposed wire, but at the same time it also affects the heat dissipation performance of the transposed wire winding

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