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Transformer coil external wire shielding and insulation processing method

A technology for transformer coil and insulation treatment, applied in the field of transformers, can solve problems such as inadequate shielding and insulation treatment methods, unsatisfactory insulation effect, etc., achieve good shielding and insulation effect, improve electric field intensity distribution, and improve insulation safety and reliability. Effect

Active Publication Date: 2008-03-19
SHANDONG DACHI ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] At present, the shielding and insulation treatment methods of the existing transformer coils and lead joints are not suitable, the insulation effect is not ideal, and there are potential safety hazards

Method used

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  • Transformer coil external wire shielding and insulation processing method

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Embodiment Construction

[0013] Accompanying drawing 1-3 is a kind of specific embodiment of the present invention.

[0014] The shielding and insulation treatment method at the outlet of the transformer coil of the present invention comprises the following steps:

[0015] a. Filling the aluminum foil shielding layer: Remove the outer insulation layer from the coil head 1, crimp the coil joint 4, remove the outer insulation layer from the lead wire 2, crimp the lead wire joint 5, connect the two joints reliably with the bolt 6, and then connect the 0.075 thick Aluminum foil 3 is pinched into a tight ball and wrapped around the two joints and the bolts, so that the aluminum foil and the joints are in reliable and firm contact. The outside is then wrapped tightly with aluminum foil strips. The surface is smooth without obvious wrinkles. Remove the outer insulation layer of the wire core lap.

[0016] b. Wrap metallized crepe paper: wrap the metallized crepe paper 7 with the metal side A facing inwards ...

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Abstract

The invention provides a method for shielding and insulating treatment of a coil lead of a transformer and is characterized in that the method comprises the following steps: (a) packing an aluminum foil shield; (b) wrapping with metallizing creped paper; and (c) wrapping with insulating paper. The invention has the advantages of improved distribution of electric field intensity, shield formation, good shielding and insulating effects, and improved safety and reliability of electrical insulation; and is mainly used in 110-220kV oil-immersed transformers and other transformers as well.

Description

(1) Technical field [0001] The invention relates to a transformer, in particular to a shielding and insulation treatment method at the outlet of a transformer coil. (2) Background technology [0002] At present, the existing shielding and insulation treatment methods at the transformer coil head and lead joints are not proper, the insulation effect is not ideal, and there are potential safety hazards. (3) Contents of the invention [0003] In order to make up for the deficiencies of the prior art, the invention provides a shielding and insulation treatment method at the outlet of a transformer coil with a safe and reliable insulation effect. [0004] The present invention is achieved through the following technical solutions: [0005] The shielding and insulation treatment method at the outlet of the transformer coil of the present invention is special in that it includes the following steps: [0006] a. Filling the aluminum foil shielding layer: Remove the outer insulat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F27/36H01F27/32
Inventor 白峰君许长华陈玉国
Owner SHANDONG DACHI ELECTRIC