RU139426U1 - HIGH VOLTAGE INLAND WITH RESIN WATER-INSULATED - 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 and which are made of two conductive tapes by winding them together with an insulation layer, characterized in that each electrode is made of two electrically conductive narrow tapes of constant width by winding them together with an insulating layer and simultaneously moving them into ol skeleton, the belt subsequent turns partially overlap previous tape windings, and the outer edges of the profile strips form elektroda.2. The core according to claim 1, characterized in that the insulation can be made of crepe paper or of a polymer non-woven synthetic material. The skeleton according to claim 1, characterized in that the leveling plates and electrically conductive tapes can be made of metal foil or of electrically conductive material.

Description

The utility model relates to electrical engineering, namely, to bushings in transformers and other high-voltage apparatuses, as well as to high-voltage cable couplings with capacitor-type insulation.

Using equalization / capacitor / plates regulate the voltage distribution in the insulation of the bushings in the radial and axial directions. The number of plates in the bushings and couplings increases with increasing voltage.

All designs of skeleton inputs with leveling plates have the same drawback.

“At the sharp edges of the lining there is a very uneven field with a significant component of tension directed along the layers of paper.

The field strength at a distance of 2 from the edge of the plate at 2 <0 / 0,1d can be estimated by the following formula:

Where U is the voltage between the plates,

d - insulation thickness

(M.A. Greysukh, G.S. Kuchinsky, D.A. Kaplan, G.T. Messerman. Oil-paper insulation in high-voltage structures. Gosenergoizdat, Moscow., - Leningrad., 1963, p. 24).

The elimination of this drawback in the core of high-voltage bushings is associated with the elimination of the sharp edges of the plates.

A known design of the core of a high voltage input with paper insulation impregnated with resin. A multilayer paper insulation impregnated with resin is applied to the conductive pipe with equalizing plates, equipped with electrodes that are located on the edges of the plates, electrically connected to them and made of an electrically conductive tape by winding it together with an insulation layer, while the edges of the wound tape form an electrode profile. (Utility Model Patent No. 110862, “High-Voltage Input Core with Paper Insulation Impregnated with Resin) ..”

The specified design of the core allows you to get the input of the capacitor type with a slightly inhomogeneous field at the edges of equalizing plates, as well as with a smaller number of plates.

However, this input design has a significant drawback that may complicate its manufacture. This refers to the design and manufacture of the electrode itself.

In figure 1 of this patent shows the electrodes, the length and height of which are 45 and 20 mm, respectively. The width of the electrically conductive tape throughout its entire length is constantly changing: from 20 mm (on the equalization lining) increases to 25 mm - at the place of curvature of the electrode, and then decreases to 15 mm - at the end of the tape.

The electrode is made by co-winding an insulation layer and an electrically conductive tape.

Electrodes having the same profile and dimensions, but mounted on plates of different diameters, must be made with electrically conductive tapes of different lengths.

As can be seen from figure 1 of this patent, the conductive tape throughout its length have a different width.

Such "profiled" conductive tapes for making electrodes need to be made in advance, which is a laborious process.

The task of this model was to change the design of the electrode and the method of performing it when winding the skeleton. "Profiled" conductive tapes should be excluded from the process and replaced with narrow conductive tapes with a width that is constant over its entire length.

The technical result is achieved by the fact that in the skeleton of a high-voltage input containing a conductive metal pipe and superimposed with a resin-impregnated multilayer insulation with equalizing plates equipped with electrodes that are located on the edges of the plates and are electrically connected to them and which are made of two electrically conductive narrow tapes of constant width by winding them together with an insulating layer and simultaneously moving along the core, while the tapes of subsequent turns partially overlap the tapes before duschih turns, and the outer edges of the profile strips form - electrode.

The core insulation can be made of crepe paper or a non-woven polymer synthetic material, and the electrically conductive tapes can be made of metal foil or electrically conductive material.

The electrical connections of the equalizing plates with the electrically conductive tapes of the electrodes can be made using electrically conductive glue.

Figure 1 shows the proposed skeleton of a high-voltage input with equalizing plates equipped with electrodes, in the context.

The skeleton contains a current-carrying metal pipe 1, on which a multilayer insulation 2 impregnated with resin is applied with equalizing plates 3. The equalizing plates are equipped with electrodes - 4, which are located on the edges of the plates and are electrically connected to them. The electrodes are made of two electrically conductive narrow tapes 5 and 6 of constant width by winding them together with the insulating layer and simultaneously moving along the core, while the tapes of subsequent turns partially overlap the tapes of the previous turns, and the outer edges of the tapes form the profile of the electrode.

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

Based on the selected electrode, as well as the location of the electrode in the core, the length of the conductive tapes is calculated.

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 and which are made of two conductive tapes by winding them together with an insulation layer, characterized in that each electrode is made of two electrically conductive narrow tapes of constant width by winding them together with an insulating layer and simultaneously moving them into ol skeleton, the belt subsequent turns partially overlap previous tape windings, and the outer edges of the tapes to form the electrode profile. 2. The skeleton according to claim 1, characterized in that the insulation can be made of crepe paper or of a polymer non-woven synthetic material. 3. The skeleton according to claim 1, characterized in that the leveling plates and electrically conductive tapes can be made of metal foil or of electrically conductive material.

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