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KR-102963330-B1 - INTERNAL ARC PROTECTION DEVICE FOR GAS INSULATED SWITCH AND GAS INSULATED SWITCH SYSTEM WITH INNER ARC PROTECTION DEVICE

KR102963330B1KR 102963330 B1KR102963330 B1KR 102963330B1KR-102963330-B1

Abstract

An arc protection device for a gas-insulated switchgear and a gas-insulated switchgear system equipped with an arc protection device are provided. The arc protection device for the gas-insulated switchgear includes a gas discharge section having a penetration hole disposed adjacent to one side of the gas-insulated switchgear enclosure and having a depth in the direction of discharge of insulating gas discharged from a pressure relief valve, and at least one mesh structure installed within the penetration hole.

Inventors

  • 홍희세
  • 백승국
  • 전종식
  • 김인성
  • 박찬광
  • 이제섭

Assignees

  • 이엔테크 주식회사

Dates

Publication Date
20260511
Application Date
20240718

Claims (12)

  1. In an arc protection device installed opposite a pressure relief valve installed on one side of the enclosure of a gas-insulated switch, A gas discharge section comprising a through hole disposed adjacent to one surface of the above-mentioned enclosure and having a depth in the direction of discharge of insulating gas discharged from the above-mentioned pressure relief valve; At least one mesh structure installed within the above-mentioned penetration hole; and It includes a base portion disposed between the underground chamber and the outer chamber, and The above at least one mesh structure includes a first mesh structure and a second mesh structure installed sequentially spaced apart in the discharge direction, and The first mesh structure and the second mesh structure include a first mesh and a second mesh having mesh sizes of different sizes, wherein the mesh size of the first mesh is larger than the mesh size of the second mesh. The above base part is, It includes a first region through which a wire connecting the above-mentioned underground casing to the above-mentioned outer casing passes, and a second region surrounding the above-mentioned gas discharge portion in a planar shape, The above-mentioned through hole is characterized in that at least a portion thereof is embedded in the second region of the base portion in the depth direction. Arc protection device for gas-insulated switchgear.
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  6. In Article 1, One side of the above penetration hole is formed facing the above pressure relief valve, and the other side is formed in the direction of the underground chamber, Arc protection device for gas-insulated switchgear.
  7. A gas-insulated switch comprising an enclosure filled with insulating gas, a switching device housed within the enclosure, and a pressure relief valve installed on one side of the enclosure; and The above gas-insulated switchgear includes an arc protection device comprising at least one mesh structure that allows insulating gas discharged through the pressure relief valve to pass through when an arc occurs, wherein The above gas-insulated switchgear includes a switchgear for underground power distribution lines, The insulating gas passing through the above-mentioned at least one mesh structure is discharged into the underground chamber, and The above-mentioned arc protection device is, It includes a gas discharge section disposed adjacent to one side of the above-mentioned enclosure and having a depth in the direction of discharge of insulating gas discharged from the pressure relief valve, and including a penetration hole in which the mesh structure is installed, and a base section disposed between the underground casing and the above-mentioned enclosure. The above at least one mesh structure includes a first mesh structure and a second mesh structure installed sequentially spaced apart in the discharge direction, and The first mesh structure and the second mesh structure include a first mesh and a second mesh having mesh sizes of different sizes, wherein the mesh size of the first mesh is larger than the mesh size of the second mesh. The above base part is, It includes a first region through which a wire connecting the underground casing to the outer casing penetrates, and a second region surrounding the gas discharge portion in a planar shape. The above-mentioned through hole is characterized in that at least a portion thereof is embedded in the second region of the base portion in the depth direction. Gas-insulated switchgear system equipped with an arc protection device.
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Description

Internal arc protection device for gas-insulated switchgear and gas-insulated switchgear system with internal arc protection device The present invention relates to an arc protection device for a gas-insulated switchgear and a gas-insulated switchgear system equipped with an arc protection device. More specifically, the invention relates to an arc protection device and a gas-insulated switchgear system equipped with an arc protection device that can reduce the discharge pressure and prevent damage to the gas-insulated switchgear by allowing the gas discharged through a pressure relief valve to pass through at least one mesh structure when an arc occurs inside the gas-insulated switchgear. Distribution voltage-class gas-insulated switchgear used in high-voltage power systems often operates without separate arc extinguishers or arc protection devices. Instead, it utilizes pressure relief valves installed within each gas compartment to protect the switchgear by releasing pressure in the event of an internal arc fault, while minimizing the impact on other gas compartments outside the fault zone. However, there is a risk of arc failure due to insulation degradation caused by the deterioration of the insulation material and corona discharge from the voids inside the insulation material during continuous use, and if an arc failure occurs, all internal parts of the tank within the accident compartment must be replaced, which may lead to increased power outage time and increased replacement costs. FIG. 1 is a perspective view for explaining a gas-insulated switchgear system equipped with an arc-resistant protection device according to an embodiment of the present invention. FIG. 2 is a perspective view illustrating an arc-resistant protection device for a gas-insulated switchgear according to some embodiments of the present invention. FIG. 3a is an exploded view of an arc-resistant protection device for a gas-insulated switchgear of FIG. 2. FIG. 3b is an exploded view of the second mesh structure of FIG. 3a. FIG. 3c is an exploded view of the third mesh structure of FIG. 3a. Figure 4 is a cross-sectional view taken along A-A' of Figure 2. Figure 5 is a drawing illustrating the problems that may occur when an arc occurs in a gas-insulated switch for an underground power line according to the prior art. FIG. 6 is a drawing for explaining the effects of an arc-resistant protection device for a gas-insulated switchgear according to an embodiment of the present invention. The advantages and features of the present invention and the methods for achieving them will become clear by referring to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below but may be implemented in various different forms. These embodiments are provided merely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the scope of the claims. Throughout the specification, the same reference numerals refer to the same components. When one component is referred to as being "connected to" or "coupled to" another component, it includes cases where it is directly connected or coupled to the other component, or cases where another component is interposed. Conversely, when one component is referred to as being "directly connected to" or "directly coupled to" another component, it indicates that no other component is interposed. "And/or" includes each of the mentioned items and all combinations of one or more of them. The terms used herein are for describing the embodiments and are not intended to limit the invention. In this specification, the singular form includes the plural form unless specifically stated otherwise in the text. As used herein, "comprises" and/or "comprising" do not exclude the presence or addition of one or more other components, steps, actions, and/or elements to the mentioned components, steps, actions, and/or elements. Although terms such as "first," "second," etc., are used to describe various components, it goes without saying that these components are not limited by these terms. These terms are used merely to distinguish one component from another. Therefore, it goes without saying that the "first component" mentioned below may be the "second component" within the technical scope of the present invention. Unless otherwise defined, all terms used in this specification (including technical and scientific terms) may be used in a meaning commonly understood by those skilled in the art to which the present invention pertains. Additionally, terms defined in commonly used dictionaries are not to be interpreted ideally or excessively unless explicitly and specifically defined otherwise. FIG. 1 is a perspective view for explaining a gas-insulated switchgear system equipped with an arc-resistant protection