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Gas insulating electric device

A technology for electrical devices and gas insulation, which is applied in the installation of switchgear, electrical components, cables, etc. It can solve the problems of high cost, high cost, and reduced withstand voltage performance of the guide plate, and achieves the effect of easy installation

Inactive Publication Date: 2009-09-09
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] A conventional gas-insulated electrical device is structured as described above. Therefore, in the gas-insulated electrical device disclosed in Patent Document 1, if it is desired to capture foreign matter in a predetermined area on the bottom of the container, it is necessary to arrange a plurality of metal rods. Position adjustment at the time of arrangement is difficult, and welding and the like are required for fixing, so there is a problem that the cost for installation becomes high.
[0010] In addition, in the gas-insulated electrical device shown in Patent Document 2 above, since the catcher is provided at the lower part of the container, it is expensive, and the electric field is concentrated on the convex portion of the guide plate bent in a zigzag shape, and the end of the guide plate. There is a problem that the withstand voltage performance of the lead plate is lowered
[0011] In addition, in the gas-insulated electrical device disclosed in Patent Document 3, since no insulating coating is applied to the convex portion, when there is a foreign object on the convex portion with a strong electric field, the foreign object tends to float toward the high-voltage conductor. Problems such as voltage performance degradation

Method used

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Embodiment approach 1

[0039] One embodiment of the present invention will be described below with reference to the drawings. figure 1 It is a perspective view showing the gas-insulated electrical device according to Embodiment 1 of the present invention, and shows a state in which a part of the grounding container is cut out in cross-section. figure 2 It is a side cross-sectional view showing the gas-insulated electrical device according to Embodiment 1 of the present invention.

[0040] In the figure, in the gas-insulated electrical apparatus 1 of the present invention, insulating gas is filled in a cylindrical grounding container 3 , and a high-voltage conductor 2 is arranged along the central axis of the grounding container 3 . The high-voltage conductor 2 is supported by the ground container 3 via an insulating spacer 4 made of an insulating member.

[0041] As the insulating gas filled in the ground container 3, SF6, dry air, nitrogen, carbon dioxide, etc. are used, but the pressure of the ...

Embodiment approach 2

[0068] Figure 9 It is an enlarged cross-sectional front view showing a gas-insulated electrical device according to Embodiment 2 of the present invention. In this embodiment, when the width of the convex portion 21b (so-called upwardly convex portion) of the corrugated plate 21 is dt and the width of the concave portion 21c (so-called downwardly convex portion) is defined as do, the corrugated plate 21 is Bending process to do≤dt.

[0069] With the configuration as described above, in the convex portion 21b of the corrugated plate 21, the rise of the electric field can be suppressed, and the electric field in the concave portion 21c can be reduced, so that metal foreign matter can be effectively captured.

[0070] That is, contrary to the above, when the relationship between do and dt is set to dt≤do, the shape of the convex portion 21b of the corrugated plate 21 becomes a sharper shape than in the case of do≤dt, so the electric field is further concentrated on the convex po...

Embodiment approach 3

[0072] Figure 10 It is a side cross-sectional view showing a gas-insulated electrical device according to Embodiment 3 of the present invention. In the ground container 3 of the gas-insulated electrical device 1, a plurality of foreign matter traps 5a, 5b are provided between the insulating spacers 4a, 4b. In addition, in Figure 10 In , the case where two foreign matter catchers 5a, 5b are provided is shown, but three or more foreign matter catchers may be provided.

[0073] A plurality of foreign matter traps 5 can be arranged in a row. At this time, in order to relax the electric field in the gap portion, it is effective to set the gap between the foreign matter traps 5 to about the height H of the corrugated plate 6 or less.

[0074] With the above configuration, even if the size of the ground container 3 is large and the distance between the insulating spacers 4 is large, it can be realized by providing a plurality of foreign matter traps 5 of a size with excellent op...

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Abstract

The present invention discloses a foreign matters trap (5), which is capable of reliably trapping metallic foreign matters in a gas insulated electric apparatus (1) and suppressing concentration of an electric field so that the apparatus becomes excellent in voltage endurance and which trap (5) can be readily mounted in a ground tank (3). A metallic corrugated plate (6) is arranged in a ground tank (3) so that a line connecting portions of the corrugated plate (6) having the same height is made parallel to a central axis of the ground tank (3), a metallic round rod (7) is mounted to an corrugated end of the corrugated plate (6), the corrugated plate (6) and the metallic round rod (7) are connected electrically to each other, and a surface of the corrugated plate (6) is covered by an insulating material.

Description

technical field [0001] The present invention relates to a gas-insulated electrical device that accommodates a high-voltage conductor in a ground tank and fills the ground tank with an insulating gas to insulate the high-voltage conductor from the ground tank. Background technique [0002] In a conventional gas-insulated electrical device, a high-voltage conductor is housed in a grounded metal container, and an insulating gas is filled in the container to achieve insulation. In this case, when assembling a gas-insulated electrical device, metal foreign matter may intrude into the container, and the metal foreign matter may float due to the strong electric field generated when the high-voltage conductor is energized, and adhere to the high-voltage conductor or approach the high-voltage conductor, As a result, the withstand voltage performance of the device may be lowered. [0003] Therefore, in a conventional gas-insulated electrical device, one or more metal rods are arrange...

Claims

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Application Information

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IPC IPC(8): H02B13/055H02G5/06
CPCH02G5/065
Inventor 钓本崇夫吉村学贞国仁志清水芳则宫本尚使
Owner MITSUBISHI ELECTRIC CORP