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Pressboard

A technology of pressing plate and base pressing plate, applied in the direction of fiberboard, transformer/inductor parts, transformer/inductor coil/winding/connection, etc.

Inactive Publication Date: 2017-08-18
ABB POWER GRIDS SWITZERLAND AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One challenge is to improve the in-plane and out-of-plane mechanical properties of the platen without degrading its dielectric properties

Method used

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Embodiment Construction

[0023] Embodiments will now be described more fully hereinafter with reference to the accompanying drawings, in which certain embodiments are shown. However, other embodiments in many different forms are possible within the scope of this disclosure. Rather, the following embodiments are provided by way of example so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. Like numbers refer to like elements throughout the description.

[0024] figure 1 An embodiment of an electrical device in the form of an electrical transformer 100 is schematically illustrated. Other examples of electrical equipment in which insulating laminates may be beneficially used include, for example, electric motors, generators, and switches. figure 1 The transformer is at least partially filled with oil (schematically illustrated by the wavy oil-air interface indicated in the figure), for example with mineral oil or ester-b...

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Abstract

The invention discloses a pressboard. The present invention relates to a cellulose based pressboard for insulation in an electrical power transformer. The pressboard comprises polyvinylamine (PVAm), and polyacrylamide (PAM), in a combined amount of between 0.01% and 20% by weight of the pressboard. The invention also relates to the use of such a pressboard as insulation in a power transformer, to a power transformer comprising such pressboard, as well as to a method of producing the pressboard.

Description

technical field [0001] The present disclosure relates to insulating cellulose-based pressboards for use in electrical power transformers as well as such transformers and methods for producing the pressboards. Background technique [0002] In different parts of electrical transformers insulating materials are used to avoid flashovers and the like. The insulating material is typically cellulose based, since such paper or pressboard materials are cheap and easy to handle while giving good insulation and having suitable mechanical, electrical and thermal properties. Examples of insulators in oil filled transformers are: [0003] - Spacers, positioned between the turns / disks of the winding, allowing oil to circulate between them. [0004] - Axial rods, positioned between the windings and the core, or between different windings. [0005] - A barrel, positioned around the winding, between the winding and its core, or between different windings. [0006] - Winding tables, positi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H17/37D21J1/20D21H17/36D21H17/56H01B3/44H01B3/18H01B3/52H01F27/32
CPCD21H17/36D21H17/375D21H17/56D21J1/20H01B3/185H01B3/447H01B3/448H01B3/52H01F27/321H01F27/32D21H17/00H01F27/00
Inventor C·皮托伊斯E·蒙蒂邦F·萨伦L·施密特O·吉尔兰达T·布拉特伯格L·瓦格博格
Owner ABB POWER GRIDS SWITZERLAND AG
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