Class-155 acetal flat enamelled copper wire and method of producing same

A production method and technology of acetal paint, applied in flat/ribbon cables, organic insulators, insulation of conductors/cables, etc., can solve the problems of bird skin, low temperature resistance level, and easy to generate burrs, etc., to improve the temperature level , high temperature resistance level, the effect of avoiding burrs

Inactive Publication Date: 2010-02-17
WUXI XIZHOU MAGNET WIRES
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Generally, oil-immersed transformers use grade 120 acetal enamelled copper flat wires, and their insulating varnish is made of polyvinyl acetal resin with a temperature grade of 120, which has good hydrolysis resistance, transformer oil resistance and excellent adhesion. However, its temperature resistance level is low, and the transformer is subject to a high temperature limit during use. Since the bare copper flat wire in the enamelled production process is mainly drawn, the surface is prone to defects such as burrs and bird skin.

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  • Class-155 acetal flat enamelled copper wire and method of producing same
  • Class-155 acetal flat enamelled copper wire and method of producing same

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Embodiment Construction

[0010] See figure 1 , the 155-grade acetal enamelled copper flat wire of the present invention includes a metal copper conductor 1, and the metal copper conductor is coated with an insulating varnish 2 outside, and the insulating varnish 2 is a modified polyvinyl acetal resin, which has a high solid content and a high viscosity , can reduce the number of paint coats, improve production efficiency, and achieve the purpose of reducing energy consumption and saving costs.

[0011] See figure 2 , the production process of the 155-grade acetal enamelled copper flat wire of the present invention is described in detail below: the electrolytic copper raw material is processed by the up-drawing method to produce an oxygen-free copper rod, and then the oxygen-free copper rod is processed and polished by a continuous extrusion machine into a bare copper flat wire, and annealed with water vapor protection, then painted, and finally baked. Among them, the bare copper flat wire is produc...

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Abstract

The invention provides a class-155 acetal flat enamelled copper wire which can resist high temperature and can enhance the temperature rating, reduce the loss and improve the efficiency of a transformer. The class-155 acetal flat enamelled copper wire comprises a copper conductor, and the copper conductor is externally coated with insulating paint. The class-155 acetal flat enamelled copper wire is characterized in that the insulating paint is modified polyvinyl acetal resin. The class-155 acetal flat enamelled copper wire is produced according to the following steps: the raw material of electrolytic copper is used to produce an oxygen-free copper rod; the oxygen-free copper rod is processed into the flat bare copper wire; the flat bare copper wire is polished and then is annealed under the protection of the steam; and the flat bare copper wire is coated and finally baked.

Description

(1) Technical field [0001] The invention relates to the field of enameled wire production suitable for oil-immersed transformers, in particular to a 155-grade acetal enameled copper flat wire and a production method thereof. (2) Background technology [0002] Generally, oil-immersed transformers use grade 120 acetal enamelled copper flat wires, and their insulating varnish is made of polyvinyl acetal resin with a temperature grade of 120, which has good hydrolysis resistance, transformer oil resistance and excellent adhesion. However, its temperature resistance level is low, and the transformer is subject to a high temperature limit during use. Since the bare copper flat wire in the enameled production process is mainly drawn, the surface is prone to defects such as burrs and bird skin. (3) Contents of the invention [0003] In view of the above problems, the present invention provides 155-grade acetal enamelled flat copper wire, which has a high temperature-resistant grad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B7/08H01B3/30H01B13/00H01B13/16
Inventor 徐进法曹永义
Owner WUXI XIZHOU MAGNET WIRES
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