JPH09320853A - Gas insulated electric device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize simplification and miniaturization of the structure of a container, by causing a temperature detector to protrude from a first wall surface near a corner section of the container, and mounting an electric field relaxation shield arranged to protrude from a distal end portion of the temperature detector onto a second wall surface near the corner section. SOLUTION: A temperature detector 8 is arranged near a corner section 6a and caused to protrude into a container 6 from a wall surface 6b. An electric field relaxation shield 9 arranged near the corner portion 6a is formed in a ring shape with one part opened, using a conductive material having a circular cross section. Then, one end of the electric field relaxation shield 9 is welded and electrically connected to a wall surface 6c, and is arranged to protrude from a distal end section 8a of the temperature detector 8, so that when the ring-shaped portion is projected toward the temperature detector 8, the temperature detector 8 falls within the projection plane of the ring-shaped section. In addition, the other end of the electric field relaxation shield 9 is arranged on the side of the wall surface 6c for the temperature detector 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas-insulated electric device in which a container is downsized by improving a withstand voltage between a tip of a temperature detector protruding into the container and a high-voltage device. .

[0002]

2. Description of the Related Art FIG. 11 is a sectional view showing a main part of a conventional gas-insulated electric device. In FIG. 11, a high voltage device 2 is housed in a container 1 in which an insulating gas is sealed, and a temperature detector 3 is housed in a pocket portion 4 provided on the side surface of the container 1. This suppresses the electric field from concentrating on the protruding portion of the temperature detector 3.

FIG. 12 is a sectional view showing a main part of another conventional gas-insulated electric device. In FIG. 12, the high voltage device 2 is housed in a container 5 in which an insulating gas is sealed, and the temperature detector 3 is arranged so as to project into the container 5.

[0004]

Since the conventional gas-insulated electric device is constructed as described above, there is a problem that the structure of the container becomes complicated because the pocket portion projects to the side surface of the container. It was

Further, since the temperature detector projects into the container, there is a problem that the container becomes large in order to separate the high voltage device and the temperature detector from each other so as to mitigate the influence of electric field concentration. It was

The present invention has been made in order to solve the above problems, and the structure of the container can be simplified and downsized by alleviating the electric field concentration at the tip of the temperature detector. An object of the present invention is to provide a gas-insulated electric device that can be used.

[0007]

According to a first aspect of the present invention, there is provided a gas-insulated electric device, wherein a high-voltage device is housed in a container in which an insulating gas is sealed, and a rod-shaped temperature detector protruding into the container is used. In a gas-insulated electric device for detecting the temperature in a container, an electric field arranged so that the temperature detector projects from the first wall surface near the corner of the container and projects from the tip of the temperature detector. The relaxation shield is attached to the second wall surface near the corner.

According to a second aspect of the present invention, there is provided a gas-insulated electric device in which an electric field relaxation shield is formed with a circular conductive member having a circular cross section, and an annular portion is formed so that one portion is opened. At this time, one end of the open end is attached to the container so that the temperature detector can be placed in the projection plane, and the other end of the open end is located closer to the wall surface of the container than the temperature detector.

In the gas-insulated electric device according to the invention of claim 3, the high-voltage equipment is housed in a container in which an insulating gas is sealed,
In a gas-insulated electric device, which is configured to detect the temperature in the container with a rod-shaped temperature detector protruding into the container,
An electric field relaxation shield having a circular cross section is formed into an annular electric field relaxation shield, and when the electric field relaxation shield is projected onto the temperature detector side, the electric field relaxation shield is placed so that the temperature detector enters the projection plane. Is arranged so as to project from the tip of the temperature detector, and the electric field relaxation shield is electrically connected to the container.

In the gas-insulated electric device according to the invention of claim 4, the electric field relaxation shield is supported by a plurality of supports fixed to the container.

In the gas-insulated electric device according to a fifth aspect of the present invention, the electric field relaxation shield is fixed to the temperature detector with a mounting screw.

In the gas-insulated electric device according to a sixth aspect of the present invention, one portion of the ring of the electric field relaxation shield is opened and fitted in the tip of the temperature detector.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1. 1 is a cross-sectional view showing the main part of the configuration of the first embodiment, and FIG. 2 is a rear view seen from the line II-II in FIG. In FIGS. 1 and 2, 6 is a container in which an insulating gas is enclosed, and has wall surfaces 6b and 6c with a corner portion 6a interposed therebetween. 7 is a high voltage device such as a transformer housed in a container 6, 8 is a corner 6
The temperature detector is arranged near a.
It protrudes into. Reference numeral 9 denotes an electric field relaxation shield disposed near the corner 6a, which is formed in an annular shape (J shape) with one open portion by using a conductive member having a circular cross section such as a round bar or a pipe. Then, one end of the electric field relaxation shield 9 is attached to the wall surface 6
When the annular portion 9a is welded to and electrically connected to c, and the annular portion 9a is projected to the temperature detector 8 side, the tip portion 8a of the temperature detector 8a is placed so that the temperature detector 8 enters the projection surface of the annular portion 9a.
Place it more prominently. Furthermore, the electric field relaxation shield 9
The other end of the wall surface 6c side of the temperature detector 8,
The distance from the wall surface 6c is about several mm.

In the above structure, the electric field relaxation shield 9 is provided to suppress the concentration of the electric field between the high voltage device 7 and the temperature detector 8 as shown by the equipotential line 10.

Embodiment 2 FIG. 3 is a rear view showing the main part of the second embodiment. In FIG. 3, 11 is a fixed seat welded to the wall surface 6c, and is provided with an internal thread 11a. Reference numeral 12 is an electric field relaxation shield having a screw 12a at one end, and has a shape similar to that of the electric field relaxation shield 9 of the first embodiment.
The male screw 12a is screwed and fixed to the female screw 11a of the fixed seat 11.

In FIG. 4, the internal thread 14a of the electric field relaxation shield 14 is screwed and fixed to the external thread 13 welded to the wall surface 6c. The shape of the electric field relaxation shield 14 is substantially the same as that of the electric field relaxation shield 9 of the first embodiment.

Embodiment 3 5 is a cross-sectional view showing the main part of the configuration of the third embodiment, and FIG. 6 is a cross-sectional view taken along the line VI-VI of FIG. 5 and 6, 6 and 6b are the same as those in the first embodiment. Reference numeral 15 is a temperature detector arranged so as to project from the wall surface 6b into the container 6, and 16 is an electric field mitigation shield arranged so as to protrude from the tip portion 15a of the temperature detector 15. It is formed in an annular shape by using a shaped conductive member. And
When the electric field relaxation shield 16 is projected on the temperature detector 15, the temperature detector 15 is arranged so as to enter the projection plane.
Reference numeral 17 denotes a plurality of supports fixed to the container 6 to fix the electric field relaxation shield 15 and the electric field relaxation shield 15
And the container 6 are electrically connected.

Embodiment 4 7 is a cross-sectional view showing the main part of the configuration of the fourth embodiment, and FIG. 8 is a rear view of FIG. Figure 7
8 and 6, 6 and 6b are the same as those in the first embodiment, and 15 and 15a are the same as those in the third embodiment. Reference numeral 18 denotes an electric field relaxation shield arranged so as to project from the tip portion 15a of the temperature detector 15, which is formed in an annular shape by using a conductive member having a circular cross section such as a round bar or a pipe. Then, the electric field relaxation shield 18 is connected to the temperature detector 15
The temperature detector 15 is arranged so as to enter the projection plane when projected to the side. A mounting plate 19 is welded to the inside of the ring of the electric field relaxation shield 18. Reference numeral 20 denotes a mounting screw, which fastens the mounting plate 19 to the temperature detector 15. The electric field relaxation shield 18 is fixed to the container 6 via the mounting plate 19 and the temperature detector 15, and is also electrically connected.

Embodiment 5 9 is a sectional view showing a main part of the configuration of the fifth embodiment, and FIG. 10 is a sectional view taken along line XX of FIG. 9 and 10, 6 and 6b are the same as those in the first embodiment, and 15 and 15a are the same as those in the third embodiment. 21 is a temperature detector 1
5 is an electric field mitigation shield fitted to the tip portion 15a so as to protrude from the tip portion 15a, and is formed in an annular shape with one open portion by using a conductive member having a circular cross section such as a round bar or a pipe. There is. Then, the electric field shield 21 is connected to the temperature detector 1
The temperature detector 15 is arranged so as to enter the projection plane when the image is projected to the 5 side. Although the electric field relaxation shield 21 is shown with a gap provided at the open end, the open end may be in close contact with the temperature detector 15 in a fitted state.

[0020]

According to the first aspect of the invention, the temperature detector is projected from the first wall surface, and the electric field mitigation shield arranged so as to project from the tip of the temperature sensor is attached to the second wall surface. This alleviates the electric field concentration at the tip of the temperature detector, so that the container can be simplified and miniaturized.

According to the second aspect of the invention, when the electric field relaxation shield which is formed in an annular shape with one portion opened is projected on the temperature detector side, the temperature detector is arranged so as to enter the projection plane. Since one end of the open end is attached to the container and the other end is placed on the wall surface side of the temperature detector, the electric field concentration at the tip of the temperature detector is eased, so the container can be simplified and downsized. be able to.

According to the third aspect of the present invention, when the electric field relaxation shield is projected on the temperature detector side, the electric field relaxation shield is projected from the tip of the temperature detector so that the temperature detector is included in the projection plane. By arranging, the electric field concentration at the tip of the temperature detector is relaxed, so that the container can be simplified and downsized.

According to the invention of claim 4, since the electric field relaxation shield is supported by a plurality of supports, it can be firmly fixed.

According to the invention of claim 5, since the electric field relaxation shield is fixed to the temperature detector by the mounting screw, the structure can be simplified.

According to the invention of claim 6, since the electric field relaxation shield is fitted to the tip of the temperature detector, the structure can be simplified.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a main part of the configuration of a first embodiment.

FIG. 2 is a rear view seen from the line II-II of FIG.

FIG. 3 is a rear view showing a main part of the second embodiment.

FIG. 4 is a rear view showing a main part of another configuration of the second embodiment.

FIG. 5 is a cross-sectional view showing the main parts of the configuration of the third embodiment.

6 is a sectional view taken along line VI-VI in FIG.

FIG. 7 is a cross-sectional view showing the main parts of the configuration of the fourth embodiment.

FIG. 8 is a rear view of FIG. 7.

FIG. 9 is a cross-sectional view showing the main parts of the configuration of the fifth embodiment.

10 is a cross-sectional view taken along line XX of FIG.

FIG. 11 is a sectional view showing a main part of a conventional gas-insulated electric device.

FIG. 12 is a sectional view showing a main part of another conventional gas-insulated electric device.

[Explanation of symbols]

6 container, 6a corner part, 6b, 6c wall surface, 7 high voltage equipment, 8, 15 temperature detector, 8a, 15a tip part,
9,12,14,16,18,21 Electric field relaxation shield, 9a Annular portion, 17 Support, 20 Mounting screw.

Claims (6)

[Claims] 1. A gas-insulated electric device, wherein a high-voltage device is housed in a container in which an insulating gas is sealed, and the temperature in the container is detected by a rod-shaped temperature detector protruding into the container. The temperature detector is projected from the first wall surface near the corner of the container, and the electric field relaxation shield arranged so as to project from the tip of the temperature detector is attached to the second wall near the corner. Characteristic gas-insulated electrical equipment. 2. An electric field relaxation shield having a circular cross-section formed of a conductive member to form an annular portion having one open portion, and when the electric field relaxation shield is projected to a temperature detector side, the temperature detection is performed on a projection plane. The gas-insulated electric device according to claim 1, wherein one end of the open end is attached to the container so that the container can be inserted, and the other end of the open end is arranged on the wall surface side of the container with respect to the temperature detector. . 3. A gas-insulated electric device in which a high-voltage device is housed in a container in which an insulating gas is sealed, and the temperature in the container is detected by a rod-shaped temperature detector protruding into the container. Is an annular electric field relaxation shield formed of a circular conductive member, and when the electric field relaxation shield is projected onto the temperature detector side, the electric field relaxation shield is placed so that the temperature detector enters the projection plane. A gas-insulated electric device, which is arranged so as to project from the tip of the temperature detector and electrically connects the electric field relaxation shield to the container. 4. The gas insulated electric device according to claim 3, wherein the electric field relaxation shield is supported by a plurality of supports fixed to the container. 5. The gas insulated electric device according to claim 3, wherein the electric field relaxation shield is fixed to the temperature detector with a mounting screw. 6. The gas-insulated electric device according to claim 3, wherein one portion of the ring of the electric field relaxation shield is opened and fitted in the tip portion of the temperature detector.