RU150647U1 - HI-VOLTAGE INLAND WITH RESIN-WATERED INSULATION AND ELECTRODES ON EQUAL DIMENSIONS - Google Patents

Abstract

1. The core of the high-voltage input containing a conductive metal pipe and superimposed with a resin-impregnated multilayer insulation with equalizing plates provided with electrodes that are located on the edges of the plates and are electrically connected to them, characterized in that the metal electrodes insulated with resin are installed on the edges leveling plates of the core, the insulation of which is impregnated with resin, and are electrically connected to them, and the installation sites of the electrodes on the plates are filled with resin. 2. The skeleton according to claim 1, characterized in that the insulation can be made of crepe paper or polymeric non-woven material. 3. The skeleton according to claim 1, characterized in that the leveling plates can be made of aluminum foil or of an electrically conductive material.

Description

The utility model relates to electrical engineering, namely, to bushings in transformers and other high-voltage apparatuses.

Widely used are high-voltage bushings, the cores of which are insulated with resin, and equalization / capacitor / plates for regulating the voltage distribution in the insulation in the radial and axial directions.

Leveling plates made of thin metal foil are located between the layers of paper. / Patents for utility model No. 38423, 41536, 80623, 86038 "High-voltage core with paper insulation impregnated with resin. /

The number of plates in the inputs increases with increasing voltage.

For bushings with paper-oil insulation for voltages of 110, 220, 330 and 500 kV, the number of plates / main and additional / respectively equal to 20, 40, 60 and 90 /. / B.C. Dmitrevsky "Calculation and design of electrical insulation" Energoizdat, Moscow, 1981, p. 226 /.

The cage designs given here have the same drawback. At the sharp edges of the plates there is a very uneven field with a significant component of tension directed along the layers of paper.

The utility model patents Nos. 110862 and 139426 show the structures of the cores in which this drawback is eliminated by installing electrodes on the leveling plates. The electrodes are located on the edges of the plates, electrically connected to them and made of one electrically conductive tape / Patent No. 110862 / or of two narrow electrically conductive tapes / Patent No. 139426 /, by winding these tapes together with an insulation layer, while the edges of the tapes form the profile of the electrode.

The work of making electrodes is time consuming. It is produced simultaneously on both sides of the skeleton.

The winding time of the electrodes is almost equal to the time of winding the insulation.

To make an electrode 16 mm high with paper 0.3 mm thick and a tape 10-15 microns thick, 52 layers will need to be wound.

When cooling the core after it is impregnated with resin due to shrinkage of the resin / 0.5-1% /, deformation of the electrodes and changes in their profile are possible.

The task of this model was to eliminate these shortcomings by changing the design of the skeleton and the technology of its manufacture.

The technical result is achieved by the fact that the manufacture of electrodes is not associated with winding the core and its impregnation. The electrodes are made of metal in the form of rings, and then insulated with resin.

Multilayer insulation with equalizing linings, wound on a pipe and subjected to thermal vacuum treatment, is impregnated with resin.

Electrodes are installed on the edges of the equalization plates, electrically connected to the plates, and then the places for installing the electrodes on the plates are filled with resin.

The core insulation can be made of crepe paper or polymeric non-woven material, and the leveling plates can be made of aluminum foil or electrically conductive material. The electrical connection of the electrodes with the plates can be carried out using electrically conductive glue.

In FIG. 1 shows the proposed skeleton of a high-voltage input with insulation impregnated with resin, and electrodes on equalization plates, in section.

The skeleton contains a conductive metal pipe 1, on which a resin-impregnated multilayer insulation 2 with equalizing plates 3 is wound.

Equalizing plates are equipped with electrodes 4, insulated with resin 5, which are located on the edges of the plates and are electrically connected to them. Places for installing electrodes on the plates are filled with resin 6.

The sizes and profile of the electrodes for each core structure are determined by calculation.

Claims (3)

1. The core of the high-voltage input containing a conductive metal pipe and superimposed with a resin-impregnated multilayer insulation with equalizing plates provided with electrodes that are located on the edges of the plates and are electrically connected to them, characterized in that the metal electrodes insulated with resin are installed on the edges leveling plates of the core, the insulation of which is impregnated with resin, and are electrically connected to them, and the installation sites of the electrodes on the plates are filled with resin. 2. The skeleton according to claim 1, characterized in that the insulation can be made of crepe paper or polymeric non-woven material. 3. The skeleton according to claim 1, characterized in that the leveling plates can be made of aluminum foil or of electrically conductive material.

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