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External insulator for mutual-inductor

A technology for external insulation and transformers, which is applied in the direction of insulators, inductors, transformers, etc., can solve the problems of external insulation performance degradation, surface pulverization, ultraviolet resistance, arc resistance and other poor performance, and achieve pollution-resistant service life and improve Effect of Low Temperature Resistance

Inactive Publication Date: 2009-02-11
潘德滨
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ordinary epoxy resins cannot be used outdoors, because of their poor performances such as UV resistance and arc resistance, and surface powdering will occur under direct sunlight for a long time, which will rapidly reduce the external insulation performance.

Method used

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  • External insulator for mutual-inductor

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Embodiment Construction

[0007] The specific implementation manner of the present invention will be described below in conjunction with the accompanying drawings.

[0008] Such as figure 1 As shown, the outer insulation of a transformer is provided with an epoxy resin layer 1 , and the outside of the epoxy resin layer 1 is entirely covered with a silicon rubber layer 2 . This product vulcanizes the silicone rubber layer 2 directly on the surface of the epoxy resin layer 1, without bonding and without gaps. The specific production process is as follows: First, the body is cast into one body with a special formula of low-temperature resistant epoxy resin, and then the liquid silicone rubber vulcanization production line imported from Germany is used to encapsulate all parts of the product except the outlet end in silicone rubber.

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PUM

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Abstract

The invention an external insulation for a transformer, which comprises an epoxy resin layer (1) and a silicone rubber layer (2) coating the outer part of the epoxy resin layer (1). The external insulation compounds silicone rubber and epoxy resin layer, so as to have the characteristics of electric arc resistance, ultraviolet resistance, contamination resistance, long service life and the like; and the silicone rubber also has hydrophobicity and can operate for a long time without maintenance. The external insulation directly casts vulcanized silicone rubber on the surface of the epoxy resin by using special equipment without bonding, so as to prevent slits and ensure long-term operation under any harsh environments, even being submerged to a depth of 250 mm. The product has a surface creepage distance over 950 mm, and a designed service life of 50 years.

Description

Technical field: [0001] The invention relates to an external insulation of a transformer, in particular to an external insulation of a cladding double-layer structure. Background technique: [0002] At present, some transformers are installed outdoors, requiring the products to be able to adapt to the outdoor operating environment. Direct sunlight, wind, rain, pollution, etc. all seriously affect the external insulation performance of the product. The external insulation life of the outdoor transformer determines the service life of the entire product. The first generation of domestic outdoor transformers are oil-immersed. Since this product is a metal shell, the external insulation mainly depends on the porcelain sleeve and the sealing ring. The surface creepage distance is small (10kV transformers are generally only about 300mm), and its arc resistance and Poor pollution resistance, flash burning and discharge are prone to occur in special environments, which will cause c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F38/20H01B17/56
Inventor 潘德滨
Owner 潘德滨
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