JP2003264916A - Gas insulated switching device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To facilitate various types of work for a gas insulated switching device such as in-line arrangement at site, increases in quantity, and replacement due to an accident. <P>SOLUTION: At the outside on one side of housings 13a, 13b of gas insulated switching devices 12a, 12b adjacent to each other, a connection conductor 21 is fitted airtightly and movably through a bellows 19 and a bushing 20. On the other side, a plug 24 fitted with the bushing 20 is provided. At the axial position of the plug 24, a connected portion 16a to which the outer end of the connection conductor 21 is fitted is airtightly provided. <P>COPYRIGHT: (C)2003,JPO

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas insulated switchgear, and more particularly, to a gas insulated switchgear having a plurality of gas insulated switchgears arranged side by side so as to be easily arranged. 2. Description of the Related Art In order to arrange a gas insulated switchgear in the same direction and to form a row board, adjacent gas insulated switchgears are connected as shown in FIG. [0003] The housings 1a, 1 of adjacent gas insulated switchgears.
b, openings 3a and 3b are formed in opposing portions of the busbars 2a and 2b, and an O-ring 5 is interposed between the flanges 4a and 4b attached to the outside of the openings 3a and 3b, respectively. The flanges 4 a and 4 b are connected via a plurality of bolts 6 and nuts 7. The bus conductors 9a and 9b supported via the insulators 8a and 8b are bridged by connecting conductors 10, thereby connecting the bus conductors 9a and 9b. Such a configuration is adopted not only in the case of a row-panel configuration, but also in the case of extension or replacement due to a failure. [0005] However, in order to form a row board, the insulating gas once filled in the factory must be extracted or sealed on site, which requires a large amount of labor. [0006] Further, in order to directly communicate the spaces of the bus room, if a flashover accident occurs inside one gas insulated switchgear, all the other gas insulated switchgears constituting the train board will have an accident. Spreads. Therefore, an object of the present invention is to provide a gas insulated switchgear which solves the above problem. According to a first aspect of the present invention, an opening is provided on one surface of a housing, and an opening is provided outside the opening. A connection conductor is provided airtightly and movably via an elastic member and a bushing,
The inner end of the connection conductor is slidably connected to a bus conductor disposed inside the opening, and an opening is provided on the other surface of the housing, and the bushing is provided in the opening. A bus conductor having a concave portion into which the outer end of the connection conductor is fitted is provided in an airtight manner through a plug into which the connector conductor is fitted. A gas-insulated switchgear is provided on one side with a bushing movable in the axial direction and a plug is provided on the other side. It is easy to arrange in the direction of the above to form a row board configuration. An embodiment of a gas insulated switchgear according to the present invention will be described below with reference to FIG. Adjacent gas insulated switchgears 12a, 12b
Openings 14 are provided on one side and the other side of the housings 13a and 13b.
a, 14b are formed, the connection 16a of the bus conductor 15a faces the opening 14a on one side, and the opening 14a on the other side.
The connection part 16b of the bus conductor 15b faces b. A concave portion 17a is formed in the connection portion 16a, and a contact 18 is provided inside the concave portion 17a. On the other hand, the connection portion 16b is formed longer than the connection portion 16a, and the contact 18 is provided inside the distal end side. A connection conductor 21 is provided outside the opening 14b so as to be airtight and movable via a bellows-like bellows (expandable member) 19 and a bushing 20. Due to the presence of the bellows 19, the displacement of the axis can be absorbed. Both ends of the bellows 19 are connected to the bushing 20 and the housing 13b via rings 22 and 23, respectively. Connection conductor 21
Is slidably inserted into the connection portion 16b. A plug 24 into which the bushing 20 is fitted is provided in the opening 14a, and the connection portion 16a is fitted airtightly at an axial position of the plug 24. A coupling means (not shown) for coupling the bushing 20 and the plug 24 is provided to constitute a plug-in type bushing. Although the bushing 20 and the plug 24 have been described as being mounted on the opposing surfaces of the adjacent gas insulated switchgear, each of the gas insulated switchgears has a bushing 20 at a position opposite to each other. And plugs 24 are attached to the housings 13a and 13b.
Is filled with an insulating gas. The operation of the gas insulated switchgear will be described. In order to form a row board configuration, the gas insulated switchgear 12b is moved to the left with respect to the gas insulated switchgear 12a, and the outer end of the connection conductor 21 is fitted into the recess 17a of the connection portion 16a. To connect the bushing 20 and the plug 24. At this time, the bushing 20 can be moved with respect to the housing 13b by the expansion and contraction of the bellows 19 and the sliding of the connection conductor 21 with respect to the connection portion 16b. The gap with the gas insulated switchgear 12b can be adjusted. Conversely, when disconnecting the gas insulated switchgear 12a and the gas insulated switchgear 12b, the connection between the bushing 20 and the plug 24 by a connecting means (not shown) is removed, and then the connection conductor is connected to the recess 17a in the connection portion 16a. 2
It is sufficient to extract the outer end portion of No. 1. That is, it is possible to form or separate a row board without making the insides of adjacent gas insulated switchgears communicate with each other. As can be seen from the above description, claim 1
According to the gas insulated switchgear according to the above, a connection conductor is provided airtightly and movably on one surface of the housing via an elastic member and a bushing, and a plug on which the bushing is fitted is provided on the other surface. Since the connection conductor having a concave portion is provided in an airtight manner, the inside of the housing is filled with an insulating gas,
Gas insulated switchgears can be connected and disconnected, eliminating the need for onsite extraction and filling of insulating gas.
Therefore, the gas insulated switchgear can be constructed in a row at the site,
It is easy to add or replace due to an accident.
Then, the management of the insulating gas may be performed only at the factory, and the quality of the insulating gas can be easily managed. Further, since the internal spaces of the adjacent gas insulated switchgears are not communicated with each other, if a flashover accident occurs inside one gas insulated switchgear, the accident hardly spreads to another gas insulated switchgear. . Further, when a flashover accident occurs in a gas insulated switchgear other than both ends of the row board configuration, only the gas insulated switchgear in which the accident has occurred needs to be replaced, and the recovery work is easy.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of a joint showing a gas-insulated switchgear according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of a connecting portion showing a conventional gas insulated switchgear. [Description of References] 13a, 13b ... Cases 16a, 16b ... Connection 19 ... Bellows 20 ... Bushing 21 ... Connection conductor 24 ... Plug

   ────────────────────────────────────────────────── ─── Continuation of front page    (72) Inventor Kazunori Naito             Stock Exchange, 2-1-1-17 Osaki, Shinagawa-ku, Tokyo             Inside Shameidensha (72) Inventor Kenji Tsuji             Stock Exchange, 2-1-1-17 Osaki, Shinagawa-ku, Tokyo             Inside Shameidensha F term (reference) 5G017 BB20 FF02 FF05 GG01                 5G365 DH03 DH04 DJ02 DJ07 DP01

Claims (1)

Claims: 1. An opening is provided on one surface of a housing, and a connection conductor is provided outside the opening through a telescopic member and a bushing so as to be airtight and movably movable. The inner end of the conductor is slidably connected to a bus conductor arranged inside the opening, and an opening is provided on the other surface of the housing,
A gas-insulated switchgear, wherein a bus conductor having a recess into which an outer end of the connection conductor is fitted is provided in the opening through a plug into which the bushing fits.