JPH0896674A - High speed grounding switchgear - Google Patents

Abstract

PURPOSE: To provide a high speed grounding switchgear which has original constitution by combining comparatively long and narrow parts with each other and by which the whole device is formed as a small type and which is excellent in mechanical strength and is excellent in workability such as inspection. CONSTITUTION: A bus bar conductor 5 being a main circuit part is arranged in the horizontal direction in a first vessel 1, and a grounding contact point 6 is housed to ground the bus bar conductor 5. A grounding contact point fixing part 7 is arranged in a central part of the bus bar conductor 5, and a grounding contact point movable part 8 to constitute the grounding contact point 6 together with this grounding contact point fixing part 7 is oppositely and vertically arranged under the grounding contact point fixing part 7. A liquid operated driving device 18 and the driving shaft 18a are horizontally arranged in the same direction with the bus bar conductor 5 in a second vessel 2. Driving force from the driving shaft 18a is transmitted to an operation shaft 8a of the grounding contact point movable part 8 after the direction is changed through a driving force transmitting mechanism composed of first and second levers 11 and 12, first and second loosely moving links 13 and 14 and a rotary shaft 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grounding device which is a part of a power transmission system protection device. In particular, the present invention relates to a high-speed ground switchgear provided at both ends of a power transmission line in which the insulation level of the air line is reduced.

[0002]

2. Description of the Related Art Conventionally, a grounding device has been combined with a disconnector to disconnect a part of a power transmission system with the disconnector, and then a part of the circuit separated from the system has a potential by electrostatic induction or electromagnetic induction. For the purpose of prevention, it was provided to keep the electric path of this portion at the ground potential. Therefore, the operation of the conventional grounding device has not been required to have high speed or breaking performance. Therefore, such a conventional grounding device has been driven by a low output drive source.

In addition, when a ground fault occurs on a line, a sufficient insulation distance has been secured for a voltage level that can occur, so that the phase distance of a transmission line and the distance to other lines are also sufficient. There was a margin. Therefore, if the circuit breakers at both ends of the accident phase are opened, the ground fault arc, etc. generated in the antenna will normally disappear in a short time, and it will normally recover to a state where it can be re-energized in a short time of 1 second or less. Met.

On the other hand, in ultra-high voltage power transmission, which is being developed in response to the recent demand for long-distance, high-power power transmission, the cost of installing the air conductor along with the increase in the transmission voltage increases, so that the voltage rises. By sophisticating the protection device, it is possible to design with a relatively low insulation level of the midair line and the like.

[0005]

By the way, in the power transmission line in which the insulation level of the air line is reduced as described above,
Once a ground fault arc occurs, energy is injected by induction from other phases even if the circuit breakers at both ends are opened, which makes it difficult for the aerial arc to extinguish, causing a problem in system operation. Therefore, a grounding device was installed on each line side of the circuit breaker at both ends of these power transmission lines, the ground contact was turned on after the circuit breaker was opened, and the energy injected into the ground fault arc of the line was released to the ground to extinguish the arc. After that, a device for opening the ground contact and enabling the closing of the circuit breaker has become necessary. Such devices are commonly referred to as high speed ground switchgear.
This high-speed grounding switchgear requires higher-speed operation and induced current interruption capability than the conventional grounding apparatus, and therefore requires a drive unit and a contact portion structure almost equivalent to those of a circuit breaker.

On the other hand, since this high-speed grounding switchgear is basically a grounding device, its grounding contact portion is
It is necessary to withstand the potential between the earth and the electric circuit in the open state. Therefore, the ground contact portion of the high-speed ground switchgear is required to have a longer insulation distance than that of the circuit breaker. This means that a driving unit having a long operation stroke, high speed, and high output is required. Therefore, for example, when the structure in which the ground contact and the drive shaft of the drive device are directly connected linearly is adopted, the axial dimension becomes extremely long, and the size of the device becomes extremely long.

Further, when considering the ratio of the length and the width of each component constituting the high-speed grounding switchgear, the length of each component is significantly larger than its width. Therefore, if a simple scale-up method is adopted in which the dimensions of each component are made to have the same length / width ratio as the corresponding components of the circuit breaker, the entire device will be upsized. When the size of the entire apparatus is increased in this way, the mechanical strength is reduced, and it becomes difficult to prevent the generation and transmission of vibration. Therefore, it is required to reduce the size of the entire device as much as possible by the unique structure of the high-speed grounding switchgear.

Further, since such a high-speed grounding switchgear is required to have a high performance, it is important to inspect it. Such an inspection is carried out for switches and protection devices of the power transmission system in general. Therefore, when considering these devices as a whole, the amount of inspection work for each device is enormous. Therefore, improving the workability of inspection is an important issue for each of the switches and protective devices of the power transmission system.

The present invention has been proposed in order to solve the above problems of the prior art, and its purpose is to:
It is an object of the present invention to provide a high-speed grounding switch having a unique configuration in which relatively long and narrow parts are combined, the entire device is small, excellent in mechanical strength, and excellent in workability such as inspection.

More specifically, the object of the present invention is to reduce the size of the entire apparatus by changing the direction of the drive shaft and the direction of the ground contact movable portion. An object of the invention described in claim 2 is to reduce the area occupied by each part on the first and second planes as much as possible. The object of the invention as defined in claim 3 is to reduce the vertical dimension of the entire device as much as possible.

An object of the present invention is to reduce the axial size of the entire device. An object of the invention described in claim 5 is to make the driving force transmission mechanism compact with the minimum necessary members and to improve the workability of assembling and inspecting the driving force transmission mechanism. The object of the invention of claim 6 is to
To reduce the axial dimension of the third plane of the overall device. An object of the invention described in claim 7 is to improve workability of assembly and inspection by utilizing a driving force transmission mechanism.

An object of the present invention is to improve mechanical strength and inspection accuracy. An object of the invention described in claim 9 is to improve workability of checking the operation of the ground contact. The object of the invention as set forth in claim 10 is to miniaturize the entire container as much as possible, to effectively use the inner and outer spaces of the second container having a small diameter to compactly construct a practical driving force transmission mechanism, and to construct the entire device. It is to reduce the axial dimension of, improve mechanical strength, improve inspection accuracy and workability. Claims 11, 12, 14, and 1
An object of the invention described in 5 is to further reduce the size of the entire device. An object of the invention of claim 13 is to improve the workability of inspection. An object of the invention of claim 16 is to further improve the mechanical strength. Claim 17
The described invention is to improve the workability of inspecting the inside of the container.

[0013]

SUMMARY OF THE INVENTION In a high speed grounded switchgear according to the present invention, a main circuit portion and a ground contact for grounding the main circuit portion are insulated by an insulating support in a container in which an arc extinguishing insulating fluid is sealed. It is configured to be housed in a supported state, and electrically connected in series to the circuit side of the circuit breaker to perform the closing operation and the opening operation in this order until the circuit breaker opens and then closes again. The high-speed ground switchgear is characterized in that the main circuit portion, ground contact, drive device, transmission means, and other components are arranged and configured as follows.

According to the first aspect of the present invention, first, a drive device having a drive shaft for driving the ground contact and a transmission means for transmitting the drive force of the drive shaft of the drive device to the ground contact are provided. The ground contact is composed of a ground contact fixing part fixed to the main circuit part side and a ground contact moving part movably provided so as to come into contact with and separate from the ground contact fixing part and driven by a drive shaft. It And the main circuit part is the first
Of the drive shaft is disposed in a second plane substantially parallel to the first plane. On the other hand, the ground contact moving part is
It is arranged to operate in a third plane that is substantially orthogonal to the first and second planes. Further, the transmission means has a rotatable drive lever that changes the direction of the driving force of the drive shaft and transmits it to the ground contact moving part.

According to the second and third aspects of the invention, in the configuration of the first aspect of the invention, the main circuit portion and the drive shaft are further arranged as follows. That is, in the invention of claim 2, the main circuit portion and the drive shaft are arranged in substantially the same direction. In the invention according to claim 3,
The first and second planes are horizontal planes.

The invention according to claim 4 is characterized in that, in the structure of the invention according to claim 1, the transmission means is configured as follows. That is, in the invention described in claim 4, the transmission means has, as drive levers, a first lever and a second lever which are attached to different positions of one rotation shaft so as to be orthogonal to the rotation shaft. The rotary shaft is arranged so as to pass through the container, and a seal means for preventing the arc extinguishing insulating fluid from flowing out is provided at the container penetrating portion of the rotary shaft. Further, the first lever and the second lever are respectively arranged inside and outside the container, the first lever is connected to the ground contact movable portion, and the second lever is connected to the drive shaft.

A fifth aspect of the invention is characterized in that, in the configuration of the fourth aspect of the invention, the transmission means is configured as follows. That is, in the invention described in claim 5, the transmission means is a first floating link that connects the first lever and the ground contact moving part, and a second floating link that connects the second lever and the drive shaft. Have. And
The first lever and the rotary shaft are fixedly coupled, and the second lever and the rotary shaft are separably coupled via a coupling means.

According to the invention of claim 6, claim 4
The configuration of the invention described above is characterized by the arrangement of the drive shaft. That is, in the invention of claim 6, the drive shaft is arranged on the ground contact side of the rotary shaft.

The invention described in claim 7 is characterized in that, in the configuration of the invention described in claim 4, the transmission means is configured as follows. That is, in the invention as set forth in claim 7, the transmission means includes a first floating link connecting the first lever and the ground contact moving part, and a second floating link connecting the second lever and the drive shaft. And a pin that rotatably connects the second floating link and the second lever. Further, an extension portion is provided in the axial direction of the pin, and the extension portion drives the ground contact driven by the second drive device that drives the ground contact separately from the drive device or one of the drive devices. One of the position measuring devices for measuring the distance can be attached.

The invention according to claim 8 is characterized in that, in the structure of the invention according to claim 1, it further has the following structure. That is, in the invention according to claim 8, the container is provided with the first mounting seat and the second mounting seat. The drive device is attached to the first attachment seat, and the auxiliary switch that detects the operating position of the ground contact is attached to the second attachment seat.

The invention of claim 9 is characterized in that, in the structure of the invention of claim 8, the auxiliary switch is further configured as follows. That is, claim 9
In the described invention, the auxiliary switch is connected to the drive lever via a link and is configured to detect the operating position of the drive lever.

The invention described in claim 10 is characterized in that, in the structure of the invention described in claim 1, each constituent element thereof is further configured as follows. That is, in the invention described in claim 10, first, the container has a first container and a second container respectively provided on both surfaces of a rigid flat plate. The first container has a tubular portion having an axis orthogonal to the flat plate, and the main circuit portion and the ground contact are housed in the first container. The second container has a first tubular portion having a first axis orthogonal to the flat plate and a second tubular portion having a second axis parallel to the flat plate and not intersecting the first axis. And the diameters of the first and second tubular portions are smaller than those of the tubular portion of the first container. The second tubular portion of the second container has, as a part of the transmission means, a rotating shaft penetrating the container and a sealing means for preventing the arc extinguishing insulating fluid from flowing out from the penetrating portion of the rotating shaft. As a drive lever, a first lever that rotates integrally with the rotating shaft in a direction orthogonal to the rotating shaft is provided inside the container of the rotating shaft, and is orthogonal to the rotating shaft outside the container of the rotating shaft. A second lever is provided which rotates integrally with the rotation shaft in the direction of rotation. Further, on the outside of the first tubular portion of the second container, there is a first mounting seat having a flat portion parallel to the second axis on the side opposite to the second axis with respect to the first axis. A second mounting seat, which is provided outside the second tubular portion of the second container and has a flat portion parallel to the second axis on the side opposite to the first axis with respect to the second axis. Is provided. A drive device is attached to the side of the first mounting seat remote from the second shaft, and the drive device is arranged such that the drive shaft penetrates the flat surface portion of the first mounting seat. A shaft guide that receives a load in the direction perpendicular to the axis of the drive shaft is mounted on the first mounting seat, and the shaft guide is opposed to the drive device at least with respect to the plane portion of the first mounting seat at a majority portion in the axial direction. It is arranged so as to be located on the side. An auxiliary switch that is connected to the second lever via a link and detects the operating position of the second lever is attached to the second mounting seat. Further, a first floating link that connects the first lever and the ground contact moving part is provided inside the first tubular portion of the second container, and the first guide link is provided outside the second container. A second idle link that connects the second lever and the drive shaft is provided near the end.

The invention described in claim 11 has the following structure in addition to the structure of the invention described in claim 10.
That is, in the invention described in claim 11, the drive device is a hydraulic drive device, and an accumulator for preventing a hydraulic pressure change of the hydraulic drive device is provided. The hydraulic drive, accumulator, second lever, and auxiliary switch are the second
Are arranged on the same side of the container as to the first axis.

According to a twelfth aspect of the present invention, in addition to the constitution of the eleventh aspect of the present invention, further constituent elements are provided, and the arrangement thereof has the following characteristics. That is, in the invention described in claim 12, a position measuring device for measuring the driving distance of the ground contact driven by either the second drive device that drives the ground contact separately from the drive device or any one of the drive devices. Is provided. The second drive or position measuring device is then arranged on the same side as the hydraulic drive and the accumulator with respect to the first axis of the second container.

The thirteenth aspect of the present invention is characterized in that, in the twelfth aspect of the present invention, an envelope is provided as another component, and the periphery of the envelope is constructed as follows. That is, in the invention according to claim 13, there is provided a substantially rectangular enclosure having four surfaces orthogonal to the flat plate and surrounding the entire portion arranged on the second container side. An opening that can be opened and closed is provided on at least two of the four surfaces of the enclosure, and a hydraulic drive device, a longitudinal end of the accumulator, and a second opening are provided in front of the opening of one opening. At least three of the lever, the auxiliary switch, the second drive device, and the position measuring device are positioned.

According to a fourteenth aspect of the present invention, in addition to the twelfth aspect of the present invention, a pump of the hydraulic drive unit and a main tank for low-pressure liquid are provided as further components, and this pump and the main tank are arranged next to each other. It has the following characteristics. That is, in the fourteenth aspect of the invention, the pump and the main tank are arranged on the side opposite to the hydraulic drive unit and the accumulator with respect to the first shaft of the second container.

According to a fifteenth aspect of the invention, in the invention according to the eleventh aspect, the arrangement of the drive shaft and the accumulator has the following characteristics. That is, in the invention of claim 15, the drive shaft is arranged on the ground contact side of the rotary shaft. The accumulator is arranged at a position farther from the hydraulic drive device than the flat plate in such a manner as to overlap the hydraulic drive device.

According to a sixteenth aspect of the present invention, in addition to the tenth aspect of the invention, the supporting structure further has the following features. That is, in the invention of claim 16, the flat plate is arranged horizontally. Then, a substantially rectangular enclosure that has four vertical surfaces orthogonal to the flat plate and surrounds the entire portion arranged on the second container side is provided. The enclosure is configured to stand by itself as a leg at the intersection of two adjacent four vertical surfaces, and to support the plate and the member arranged on the first container side. It is configured to have the longest side in the direction or the drive axis direction.

The invention described in claim 17 is characterized in that, in addition to the structure of the invention described in claim 10, it has the following structure. That is, in the invention according to claim 17, a handhole for inspecting the inside of the container is provided on a side surface of the first tubular portion of the second container, and the handhole is provided with respect to the first axis. It is arranged at a position farther than the second shaft and at a position facing the connecting portion between the first lever and the first floating link.

[0030]

In the present invention having the above construction,
The following effects are obtained. That is, first, of the main circuit portion, the ground contact, and the drive device that constitute the high-speed ground switchgear, the ground contact and the drive device respectively include a ground contact movable portion and a drive shaft that linearly reciprocate in the axial direction. There is. On the other hand, in the present invention, by making the direction of the drive shaft different from the direction of the ground contact movable part, the axial dimension of the entire device can be reduced.

Further, when the direction of the drive shaft and the direction of the ground contact movable part are changed in this way, means for converting the direction of the driving force from the drive shaft and transmitting it to the ground contact movable part is required. . As such means, when a drive lever having the rotation plane of the drive lever and the operation axis of the drive shaft and the ground contact moving part in the same plane is provided, the drive shaft and the operation axis of the ground contact drive part are Are intersected with each other, and movement interference between these axes occurs, so that the axial dimension is increased by the movement interference. However, by providing the first and second levers as drive levers and configuring these levers to rotate in two parallel planes spaced apart from each other by a required distance, the operation of the drive shaft and the ground contact drive unit Since the shaft intersects with the shaft in a three-dimensional manner and the mutual movement of these shafts can be prevented, the axial dimension can be reduced.

According to the first aspect of the invention, the direction of the drive shaft and the direction of the ground contact moving part are substantially orthogonal to each other, so that the driving shaft and the ground contact moving part are arranged in a straight line, The axial size of the device can be reduced. As a result, the entire device can be downsized. Further, the transmission means having a simple structure using the drive lever can easily convert the direction of the driving force to the orthogonal direction, and efficiently transmit the driving force from the drive shaft to the ground contact movable portion.

According to the second aspect of the present invention, the main circuit portion and the drive shaft are arranged in substantially the same direction.
The dimensions in the direction orthogonal to the arrangement direction of the main circuit portion and the drive shaft on the second plane can be reduced as much as possible.
As a result, the area occupied by each part on the first and second planes can be reduced as much as possible. According to the third aspect of the present invention, the main circuit portion and the drive shaft are horizontally arranged on the first and second planes, so that the main long member vertically arranged is only the ground contact movable portion. . As a result, the vertical dimension of the entire device can be reduced as much as possible.

According to the fourth aspect of the present invention, as the drive levers, the first and second levers are provided at different positions in the axial direction of the same rotary shaft, so that these levers are separated from each other by the required distance. It will rotate in two parallel planes. Then, by connecting the ground contact moving part and the drive shaft to the first and second levers that rotate in the two parallel planes, respectively, the drive shaft and the operation shaft of the ground contact moving part intersect three-dimensionally. This makes it possible to prevent the movement interference between these axes. Therefore, the axial dimension of the entire device can be reduced.

According to the fifth aspect of the present invention, the rotary shaft, the first and second levers, and the first and second idle links easily change the direction of the driving force from the driving shaft to make ground contact. It can be transmitted to the movable part. Further, at the time of assembly, the first lever and the rotary shaft are housed in the container with the second lever removed from the rotary shaft, and the tip of the rotary shaft is projected to the outside of the container, and then the second lever. By attaching, the assembly around the rotary shaft can be easily performed. In this case, the sealing means can be easily attached from the outside of the container with the tip of the rotary shaft protruding outside the container. Furthermore, since the first lever and the rotary shaft are fixedly connected, it is not necessary to check the connecting portion between the first lever and the rotary shaft at the time of inspection. Therefore, the driving force transmission mechanism can be made compact with the minimum necessary number of members, and the workability of assembling and inspecting it can be improved.

According to the sixth aspect of the invention, since the drive shaft is arranged on the ground contact side of the rotary shaft, the axial dimension of the third plane is the operating range of the ground contact moving part in this direction or The size is obtained by adding the operating range of the first lever or the operating range of the first floating link to this. Therefore, the axial dimension of the third plane of the entire device can be reduced as compared with the case where the drive shaft is arranged on the side opposite to the ground contact of the movable shaft.

According to the invention described in claim 7,
At the time of inspection, the second drive device or the position measuring device is attached to the extension portion of the pin that rotatably connects the second floating link and the second lever. The movement and position of can be easily monitored. Therefore, the workability of assembly / inspection can be improved by utilizing the driving force transmission mechanism.

According to the eighth aspect of the invention, the drive device and the auxiliary switch can be directly attached to and supported by the container by the first and second mounting seats provided on the container. In this case, the first and second mounting seats also function as a reinforcing member for the container. Further, since the driving device and the auxiliary switch are coupled in the same vibration system, the ground contact operation can be detected with a small error. Therefore, mechanical strength and inspection accuracy can be improved.

According to the present invention, the driving device drives the ground contact movable portion via the drive lever, and at the same time, the auxiliary switch can be directly operated via the link by the operation of the drive lever. . Therefore,
The operation of the auxiliary switch can detect the operation of the ground contact with a smaller error, and the workability of checking the operation of the ground contact can be improved.

According to the tenth aspect of the invention, since the main circuit portion and the ground contact are arranged in the orthogonal direction in the first container, the first container is formed in a simple cross-shaped branch tank. be able to. In addition, the rotating shaft and the first
Since the lever and the first floating link are housed, the second container can be formed as a small tank in which two tubular parts are combined. On the other hand, in the driving force transmitting mechanism, the rotating shaft, the first and second levers, and the first and second idle links easily change the direction of the driving force from the driving shaft and transmit it to the ground contact moving part. can do. In this case, since the drive shaft and the operation axis of the ground contact movable part intersect three-dimensionally, it is possible to prevent the operation interference between these axes. Furthermore, since the drive device and the auxiliary switch are directly attached to and supported by the second container by the first and second mounting seats provided in the second container,
Since the drive unit and the auxiliary switch are connected in the same vibration system, the ground contact operation can be detected with a small error. In this case, since the auxiliary switch can be directly operated via the link by the second lever, it is possible to detect with a smaller error. Therefore, the entire container can be made as small as possible, the space inside and outside the second container having a small diameter can be effectively used to make a practical driving force transmission mechanism compact, and the overall axial dimension of the device can be reduced. It is possible to reduce the size, improve the mechanical strength, and improve the inspection accuracy and workability.

According to the eleventh and twelfth aspects of the invention, by utilizing the difference in diameter between the first and second containers, a plurality of constituent elements are provided in a space on one side of the first shaft of the second container having a small diameter. Can be placed. Therefore, the entire device can be made smaller. According to the invention of claim 13,
When using a hydraulic drive, one opening can be opened and three or more components located in front of the opening can be inspected simultaneously. Therefore, the workability of inspection can be improved. According to the invention described in claim 14, by utilizing the diameter difference between the first and second containers, the pump and the main part are provided in the space on the opposite side of the first shaft drive device and the accumulator of the small diameter second container. A tank can be placed. Therefore, the entire device can be made smaller. According to the fifteenth aspect of the invention, the accumulator and the hydraulic drive device are three-dimensionally arranged at the overlapping position,
The space can be used more effectively. Therefore, the entire device can be made smaller.

According to the sixteenth aspect of the present invention, the longest side in the strength direction of the enclosure can be made coincident with the direction of the main circuit portion or the drive axis direction which is the vibration direction of the device.
Therefore, the mechanical strength can be further improved.
According to the seventeenth aspect of the present invention, at the time of inspection, the connecting portion between the first lever and the first floating link can be easily inspected by the handhole for inspecting the inside of the container.
Therefore, the workability of inspection can be improved.

[0043]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the high-speed ground switchgear according to the present invention will be specifically described below with reference to FIGS.

[1] Structure of the Embodiment ... FIGS. 1 and 2 FIG. 1 is a schematic vertical sectional view showing the structure of an embodiment of the high-speed grounding switchgear according to the present invention, and FIG. It is a typical horizontal sectional view showing composition of an enclosure part. Of these, in FIG. 1, 100 is a high-speed grounding switchgear, 101
Is a circuit breaker. That is, the circuit breaker 101 includes the high-speed ground switchgear 100, the disconnector 102, the bushing 103,
The air transmission line 104 is connected in series in this order. In addition, on both sides of the disconnector 102, a normal grounding device 105,
106 is connected, and further, a grounding device 107 is connected between the grounding device 106 and the bushing 103.

As shown in FIG. 1, the high-speed grounding switchgear 100 of this embodiment has first and second containers 1 and 2 vertically arranged in a vertically arranged manner, and between these containers 1 and 2. It is provided with the inserted flat plate 3 and an enclosure 4 attached below the flat plate 3 to surround the second container 2.

First, the internal structure of the first container 1 will be described. As shown in FIG. 1, the first container 1 includes a vertical cylindrical portion 1a that is long in the vertical direction and a pair of protruding portions 1b and 1c that project to both sides in the horizontal direction of the vertical cylindrical portion 1a. It is formed in a cross shape. The arc-extinguishing insulating fluid is enclosed in the first container 1 having such an outer shape, and the busbar conductor 5 which is a main circuit portion connected in series with the circuit breaker 101 and the disconnector 102. A ground contact 6 for grounding the bus bar conductor 5 is housed.

Of these, the bus bar conductor 5 is arranged in the horizontal direction from one lead-out portion 1b to the other lead-out portion 1c. At the center of the bus bar conductor 5, there are provided a ground contact fixing portion 7 that constitutes the ground contact 6 and an electric field control shield 7a thereof. Below the ground contact fixing portion 7, a ground contact moving portion 8 that constitutes the ground contact 6 together with the ground contact fixing portion 7 is vertically arranged facing the ground contact fixing portion 7. The movable ground contact portion 8 is grounded by the ground conductor 9 and is moved up and down by the raising and lowering operation of the operating shaft 8a to come into contact with and separate from the earth contact fixing portion 7, and at the time of contact, connect the earth conductor 9 and the bus conductor 5.
The ground conductor 9 and the busbar conductor 5 are configured to be separated when they are separated.

Reference numerals 10a to 10d in the figure denote insulating supports for insulatingly supporting the busbar conductor 5, the ground contact movable portion 8 and the ground conductor 9 with respect to the first container 1 or the flat plate 3, respectively. That is, the insulating supports 10a and 10b
Means that both ends of the busbar conductor 5 are connected to the lead-out portion 1 of the first container 1.
It is arranged so as to insulate and support b and 1c,
The insulating support 10c is disposed so as to insulate and support the lower end of the ground contact moving part 8 against the upper surface of the flat plate 3.
The insulating support 10d is arranged so as to pass through the side surface of the vertical tubular portion 1a of the first container 1, and the ground conductor 9 is passed through the inside of the insulating support 10d so that the first conductor 1d The container 1 is configured to be insulated and supported.

Next, the structure around the second container 2 will be described. As shown in FIGS. 1 and 2, the second container 2
Is composed of a vertical tubular portion 2a arranged substantially coaxially with the ground contact movable portion 8 and a horizontal tubular portion 2b connected in the horizontal direction of the vertical tubular portion 2a. Further, in the horizontal direction on the side of the vertical tubular portion 2a different from the horizontal tubular portion 2b,
An internal inspection handhole 2c is provided so as to project from the vertical cylindrical portion 2a. Then, an arc extinguishing insulating fluid is enclosed in the second container 2 having such an outer shape, and a driving force is applied to the operation shaft 8a of the ground contact moving part 8 inside and outside the second container 2. A plurality of members that configure a driving force transmission mechanism for transmitting are arranged.

That is, as shown in FIG. 1 and FIG.
As the plurality of members forming the driving force transmission mechanism for transmitting the driving force to the operation shaft 8a, the first and second levers 1 are provided.
1, 12, first and second floating links 13 and 14, and a rotary shaft 15 are provided. Of these, the rotating shaft 15
Are arranged so as to penetrate the horizontal cylindrical portion 2b of the second container 2. In this case, in the penetrating portion of the rotary shaft 15,
The airtightness in the second container 2 is maintained and the rotary shaft 1
A shaft sealing device (sealing means) 16 that rotatably supports 5 is provided. Then, as shown in FIG. 2, the first lever 11 is fixedly connected to the inside of the container of the rotary shaft 15 by welding, and the second lever is provided to the outside of the container of the rotary shaft 15. 12 are separably coupled via a torque transmission means (not shown). Further, the end of the rotary shaft 15 on the inner side of the container is rotatably supported by a shaft support member 17 fixed to the second container 2.

Further, as shown in FIG. 1, the first floating link 13 is coaxially arranged in the vertical cylindrical portion 2a of the second container 2, and the first lever 11 is provided at one end thereof. Is rotatably pin-coupled, and is rotatably pin-coupled to the operation shaft 8a of the ground contact moving part 8 at the other end. The first floating link 13 is formed of an insulating material to insulate the ground contact movable portion 8 and the first lever 11 from each other. In addition, when the inside of the second container 2 is seen from the handhole 2c in the state where the first lever 11 is within the normal movement range,
The connecting pins of the first lever 11 and the first floating link 13 are arranged in such a positional relationship that they are located in front of the handhole 2c. And again, the second idle link 14
It is arranged above the outside of the horizontal cylindrical portion 2b of the second container 2 and, as shown in FIG. 2, has one end rotatably pin-connected to the second lever 12 and the other end. Is rotatably pin-connected to the drive shaft 18a of the hydraulic drive device 18.

In this case, the hydraulic drive device 18 and its drive shaft 18a are located near the flat plate 3 below the flat plate 3 and near the vertical cylindrical portion 2a of the second container 2 as shown in FIG. And are horizontally arranged in the same direction as the busbar conductor 5. The drive shaft 1a is surrounded by the drive shaft 1a.
A shaft guide 19 for receiving a load in the direction perpendicular to the axis of 8a is arranged coaxially.

Further, as shown in FIG. 1, the second container 2
A first mounting seat 21 having a vertical plane portion parallel to the axis of the horizontal tubular portion 2b is provided outside the vertical tubular portion 2a of
A second mounting seat 22 having a vertical plane portion parallel to the axis of the horizontal tubular portion 2b is provided outside the horizontal tubular portion 2b. The hydraulic drive device 18 and the shaft guide 19 are mounted on the vertical plane portion of the first mounting seat 21. In this case, the hydraulic drive device 18 is provided on one side (the side far from the second container 2) of the first mounting seat 21 such that the drive shaft 18 penetrates the vertical plane portion of the first mounting seat 21. It is arranged. In addition, the shaft guide 19 includes the first mounting seat 2
The vertical flat surface portion 1 supports the end portion on the hydraulic drive device 18 side, and most of the portion is supported by the first mounting seat 21.
Of the vertical plane of the hydraulic drive unit 18 (second side)
(The side close to the container 2) of the above.
On the other hand, the auxiliary switch 30 is mounted on the vertical plane portion of the second mounting seat 22. This auxiliary switch 30 is connected to the second lever 12 via a link 31,
It is configured to detect the operating position of the second lever 12.

As shown in FIG. 1, a third mounting seat 23 is provided on the lower surface of the flat plate 3 near the auxiliary switch 30. This third mounting seat 23 is assembled and
It is provided for fixing a screw jack (second drive device) 24 for manually driving the ground contact separately from the hydraulic drive device 18 at the time of inspection. That is, the pin 12a connecting the second floating link 14 and the second lever 12 is provided with an extension in the axial direction as shown in FIG. 2, and the extension of the pin 12a is screwed. One end of the jack 24 is attached. As described above, one end of the screw jack 24 is attached to the pin 12a and the other end is attached to the third attachment seat 23 at the same time.

Further, as shown in FIG. 2, the second container 2
An accumulator 40 for preventing a change in hydraulic pressure of the hydraulic drive device 18, a pump of the hydraulic drive device 18, and a low-pressure liquid tank 50 are arranged around the. In this case, as shown in FIG. 1, the accumulator 40 is arranged below the hydraulic pressure drive device 18 at a position apart from the hydraulic pressure drive device 18 and in parallel with the hydraulic pressure drive device 18. Is configured to supply the pressurized liquid to the hydraulic drive device 18. An inspection port 41 for confirming the internal pressure provided at the end of the accumulator 40 in the longitudinal direction is arranged below the auxiliary switch 30. On the other hand, as shown in FIG. 2, the pump and the low-pressure liquid tank 50 are arranged at positions facing the accumulator 40 with the second container 2 interposed therebetween. In this case, the arrangement configuration of each component in the horizontal direction is as shown in FIG. That is, in FIG.
On one side (lower side in the drawing) of the container 2 of FIG.
Accumulator 40, second lever 12, auxiliary switch 3
0 is arranged, and the screw jack 24 which is the second drive device is arranged on the same side at the time of assembly and inspection. A pump and a low-pressure liquid tank 50 are arranged on the opposite side (upper side in the drawing) of the second container 2.

Finally, the structure of the enclosure 4 will be described. As shown in FIG. 2, the enclosure 4 has four vertical surfaces below the flat plate 3 and orthogonal to the flat plate 3, and the second container 2
It is provided so as to form a rectangular parallelepiped that surrounds the entire inside and outside of the above-described configuration. The enclosure 4 is formed such that the sides in the direction of the busbar conductor 5 and the drive shaft 18a are the longest. In addition, the enclosure 4 is formed so that the intersecting portions of the two adjacent two surfaces of the four vertical surfaces are self-supporting as the legs 4a. That is, the legs 4a are formed at four corners in the horizontal direction. And the inspection port 4 of the accumulator 40 in this enclosure 4
1, a vertical opening that faces the auxiliary switch 30 and the screw jack 24 is provided with a first opening 4b that can be opened and closed. Further, in the enclosure 4, a long side surface of the hydraulic drive device 18, a long side surface of the accumulator 40,
The second lever 12 and the link 31 of the auxiliary switch 30
A second opening 4c that can be opened and closed is provided on the vertical surface facing the
Is provided.

[2] Operation and effect of the embodiment ... FIG. 3 The operation and effect of the present embodiment having the above-mentioned configuration are as follows.

First, since the busbar conductor 5 which is the main circuit portion and the ground contact movable portion 8 are arranged in a direction orthogonal to each other, the first container 1 can be formed into a simple cross-shaped branch tank, and The length of the bus bar conductor 5 can be shortened.
As a result, the supporting and fixing strength of the ground contact fixing portion 7 can be improved. As a modified example of this portion, if an insulating support tube or the like is provided in the space above the ground contact fixing portion 7, the support fixing strength can be further improved.

Next, the ground contact movable portion 8 and the hydraulic drive device 1
Since the eight drive shafts 18a are arranged in two orthogonal planes and in a three-dimensionally intersecting manner, it is possible to prevent operation interference between these shafts. Therefore, the axial dimension of the entire device can be reduced. This point will be described in detail with reference to FIG. Here, (A) of FIG. 3 is a schematic side view in the case where the driving force transmission mechanism is configured to intersect in the same plane, and (B) of FIG. 3 is a plan view of (A). Further, FIG. 3C is a schematic side view when the drive shaft 18a and the operation shaft 8a of the ground contact movable portion 8 are configured by being divided into two parallel planes (configuration of this embodiment). Yes, FIG. 3D is a plan view of FIG.

As is apparent from FIG. 3, in the case of the plane intersection (A) and (B) and the cases of the grade intersection (C) and (D), the movable portion from the end of the hydraulic drive device 18 to the ground contact movable portion. 8
La and Lc in the direction of the drive shaft 18a up to the operating shaft 8a of
Comparing ₀ , the length Lc ₀ in the drive axis direction in the case of a three-dimensional intersection (C) and (D) is larger than the length La in the case of a plane intersection (A) and (B) from the rotating shaft 15 to the ground contact. The length of the movable portion 8 up to the operation shaft 8a is shortened by Lc ₁ . Here, the operation shaft 8a has the smallest diameter of the first container 1 when it coincides with the axial center of the first container 1 due to the requirement of the electrical insulation distance in the first container 1. Therefore, the hydraulic drive device 1
In a drive unit that requires the same size La from the end of 8 to the operation shaft 8a, it is possible to effectively utilize the installation space by distributing the size La on both sides of the rotary shaft 15. Also,
In the present embodiment, the drive shaft 18a is arranged on the side of the rotary contact 15 on which the ground contact moving portion 8 is located. This is also the size of the ground contact moving portion 8 in the direction of the operating shaft 8a, as is apparent from FIG. This is effective in shortening Ha and Hc, and at the same time, a space for accommodating a long-sized structure such as the accumulator 30 can be secured in the space below the rotary shaft 15.

Further, in the case of the plane intersection (A) and (B), in the case of the grade intersection (C) and (D), there is a drawback that the rotation shaft 15 is twisted, but in terms of member weight. Since a heavy object is divided into two parts on both sides of each of the operation shaft 8a of the ground contact movable portion 8 and the drive shaft 18a, the weight balance is excellent and the mechanical stability can be improved.

Now, paying attention to FIG. 3D, the rotation shafts 15 of the first and second levers 11 and 12 are twisted as described above. When a fastening means such as a screw or a key is used for such a structure portion, the fastening quality greatly affects the product quality. As a result, this part needs to be inspected, but in the gas-insulated switchgear, the inspection in the gas is an extremely large-scale work including gas treatment, and therefore cannot be inspected easily. On the other hand, in the present embodiment, the first lever 11 and the rotary shaft 15 housed in the second container 2 are fixedly joined by welding, so that stable joining quality can be obtained. ,
No inspection for looseness is required. Also, at the time of assembling, the work becomes easier because the number of assembled parts is reduced. Therefore, the workability of assembly and inspection can be improved. As a modified example of this portion, a fixing method other than welding, for example, a configuration in which they are joined by integral molding or the like is also possible, and the same action and effect are obtained.

Further, Lc ₀ and Lc ₁ shown in FIG.
Since the size of is substantially Lc ₀ > Lc ₁ , a vacant space is formed by the size of Lc ₀ −Lc ₁ . On the other hand, in this embodiment, the auxiliary switch 30 is provided in this portion, and the space is effectively utilized. Therefore, it can further contribute to downsizing of the entire device.

In this case, in this embodiment, the hydraulic drive unit 18 and the auxiliary switch 30 are attached to the first and second attachment seats 21 and 22 provided on the second container 2, respectively.
Therefore, the hydraulic drive device 18 and the auxiliary switch 30 are attached to the flat plate 3
It is possible to prevent the operation timing from deviating due to the deformation of the container 2 due to the driving force, and to detect the ground contact operation with a small error, as compared with the case where the container 2 is attached to the enclosure 4. On the other hand, from the viewpoint of twist between the first lever 11 and the second lever 12, the smaller the diameter of the vertical tubular portion 2a and the horizontal tubular portion 2b of the second container 2, the smaller the first The distance between the lever 11 and the second lever 12 becomes short, which is desirable, but in this case, the deformation of the container 2 due to an external force tends to increase. On the other hand, in the present embodiment, since the first mounting seat 21 for the hydraulic drive device 18 is directly mounted on the second container 2, this mounting seat 2
Since 1 also functions as a reinforcing member for the second container 2, it is possible to reduce displacement vibration due to driving force. Particularly, since the hydraulic drive device 18 and the shaft guide 19 are arranged on both sides of the first mounting seat 21, respectively, the weight balance is excellent. Further, since the auxiliary switch 30 is also connected to the same container 2 via the second mounting seat 22, the hydraulic drive device 18 and the auxiliary switch 30 are connected in the same vibration system. Therefore, it is possible to detect with less error. Therefore, mechanical strength and inspection accuracy can be improved.

Further, in this embodiment, the enclosure 4 shown in FIG. 2 is used as a leg of the high-speed grounding switch, and the longest side in the strength direction thereof is hydraulically driven in the main direction of vibration. The drive shaft 18a of the device 18 is aligned with the same direction, and is also aligned with the direction of the busbar conductor 5, which is the maximum vibration force direction. Therefore, it becomes possible to stabilize the mechanical strength of the high-speed grounding switchgear to the maximum. Further, in the present embodiment, most of the movable parts associated with the operation are arranged on the same side as the hydraulic drive device 18, while the pump of the hydraulic drive device 18, the low pressure liquid tank 50, other necessary parts and Since the lead-out portion of the grounding conductor 9 provided in the first container 1 and the like are arranged on the side opposite to the hydraulic drive device 18, the weight balance is excellent and the mechanical strength can be stabilized from this point as well. it can.

On the other hand, at the time of inspection, one end of the screw jack 24 is attached to the extension portion of the pin 12a, and one end of the position detector using a resistance rod or the like is attached to the extension portion of the pin 12a, and the other end of the screw jack 24 is attached. It is also possible to monitor the position of the second lever 12 during operation by mounting the end on the third mounting seat 23. Further, regarding the connecting portion between the first lever 1 and the first floating link 13 housed inside the second container 2, the connecting state of the connecting pin is changed by the hand hole 3c provided in the container 2. It can be easily inspected from the front. Therefore, from these points as well, the workability of inspection is excellent. Further, by opening the first opening 4b of the enclosure 4, the inspection port 41 of the accumulator 40, the auxiliary switch 3
0 and the screw jack 24 can be inspected at the same time. Similarly, by opening the second opening 4c of the enclosure 4, the hydraulic drive 18, the second lever 12, and the link 31 of the auxiliary switch 30 can be inspected at the same time.

[3] Other Embodiments The present invention is not limited to the above-mentioned embodiments, and the specific constitution and arrangement of each constituent element can be changed as appropriate. For example, the container does not necessarily have to be divided into two, and the specific configuration of the driving device, the auxiliary switch and the driving force transmission mechanism,
Also, the supporting structure of the driving device and the auxiliary switch can be appropriately changed. Furthermore, the specific configurations of the main circuit portion and the ground contact can be changed as appropriate.

[0068]

As described above, according to the present invention,
The main circuit section, ground contact, drive unit, transmission unit, and other components are arranged in a unique configuration that combines relatively slender parts, and the entire unit is compact and has excellent mechanical strength. It is possible to provide a high-speed grounding switchgear having excellent workability.

[Brief description of drawings]

FIG. 1 is a schematic vertical sectional view showing the configuration of an embodiment of a high-speed grounding switchgear according to the present invention.

FIG. 2 is a schematic horizontal cross-sectional view showing the configuration of the enclosure portion of FIG.

FIG. 3A is a schematic side view showing a driving force transmission mechanism in the case where the driving force transmission mechanism is configured by in-plane intersection, FIG. 3B is a plan view of FIG. 3A, and FIG. The typical side view which shows a driving force transmission mechanism (structure of FIG. 1), (D) is a top view of (C).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... 1st container 1a ... Vertical cylindrical part 1b, 1c ... Opening part 2 ... 2nd container 2a ... Vertical cylindrical part 2b ... Horizontal cylindrical part 2c ... Hand hole 3 ... Flat plate 4 ... Enclosure 5 ... Busbar Conductor 6 ... Ground contact 7 ... Ground contact fixed part 7a ... Electric field control shield 8 ... Ground contact movable part 8a ... Operation shaft 9 ... Ground conductor 10a-10d ... Insulating support 11 ... First lever 12 ... Second lever 12a ... Pin 13 ... 1st floating link 14 ... 2nd floating link 15 ... Rotating shaft 16 ... Shaft sealing device 17 ... Shaft supporting member 18 ... Hydraulic drive device 18a ... Drive shaft 19 ... Shaft guide 21 ... 1st Mounting seat 22 ... Second mounting seat 23 ... Third mounting seat 24 ... Screw jack 30 ... Auxiliary switch 31 ... Link 40 ... Accumulator 41 ... Inspection port 50 ... Pump and low-pressure liquid tank 100 ... High-speed grounding switch 101 ... Circuit breaker 02 ... disconnector 103 ... bushings 104 ... aerial power lines 105, 106 ... ordinary grounding device 107 ... arresters

Claims (17)

[Claims] 1. A container in which an arc extinguishing insulating fluid is enclosed,
The main circuit part and the ground contact for grounding the main circuit part are housed in a state of being insulated and supported by an insulating support, and are electrically connected in series to the line side of the circuit breaker to open the circuit breaker. In a high-speed grounding switchgear that performs a closing operation and an opening operation in this order between operation and reclosing, a drive device having a drive shaft for driving the ground contact, and a driving force of the drive shaft of the drive device. Is provided to the ground contact, and the ground contact is movably provided so as to come into contact with and separate from the ground contact fixing portion fixed to the main circuit portion side. And a ground contact moving part driven by a drive shaft, wherein the main circuit part is arranged in a first plane and the drive shaft is arranged in a second plane substantially parallel to the first plane. , The ground contact moving part is Arranged to operate in a third plane that is substantially orthogonal to the second plane, the transmitting means converts the driving force of the drive shaft to transmit it to the ground contact moving part. A high-speed grounding switchgear having a lever. 2. The high-speed ground switchgear according to claim 2, wherein the main circuit portion and the drive shaft are arranged in substantially the same direction. 3. The high-speed ground switchgear according to claim 1, wherein the first and second planes are horizontal planes. 4. The transmission means includes, as the drive lever, a first lever and a second lever which are attached at different positions of one rotation shaft so as to be orthogonal to the rotation shaft, A shaft is arranged so as to penetrate the container, and a sealing means for preventing the arc extinguishing insulating fluid from flowing out is provided at a part of the rotary shaft that penetrates the container, and the first lever and the second lever are provided. 2. The high-speed ground according to claim 1, wherein the levers are respectively arranged inside and outside the container, the first lever is connected to the ground contact moving part, and the second lever is connected to the drive shaft. Switchgear. 5. The transmission means includes a first floating link connecting the first lever and the ground contact moving part, and a second floating link connecting the second lever and the drive shaft. And the first lever and the rotating shaft are fixedly coupled to each other,
The high-speed grounding switchgear according to claim 4, wherein the second lever and the rotary shaft are detachably coupled via a coupling means. 6. The high-speed ground switchgear according to claim 4, wherein the drive shaft is arranged on the ground contact side of the rotary shaft. 7. The first transmission link, which connects the first lever and the ground contact moving part, and the second transmission link, which connects the second lever and the drive shaft, to each other. And a pin that rotatably connects the second floating link and the second lever, and an extension portion is provided in the axial direction of the pin.
In addition to the drive device, a second drive device that drives the ground contact, or a position measuring device that measures the drive distance of the ground contact driven by one of the drive devices can be attached. The high-speed ground switchgear according to claim 4, wherein the high-speed ground switchgear is provided. 8. The container is provided with a first mounting seat and a second mounting seat, and the driving device is mounted on the first mounting seat.
The high-speed ground switchgear according to claim 1, wherein an auxiliary switch that detects an operating position of the ground contact is mounted on the second mounting seat. 9. The high-speed grounding switchgear according to claim 8, wherein the auxiliary switch is connected to the drive lever via a link and is configured to detect an operating position of the drive lever. 10. The container has a first container and a second container respectively provided on both sides of a rigid flat plate, and the first container has a tubular portion having an axis orthogonal to the flat plate. And, in the first container, the main circuit portion and the ground contact are housed, the second container, a first tubular portion having a first axis orthogonal to the flat plate, It has a second tubular portion having a second axis parallel to the flat plate and not intersecting with the first axis, and the diameters of the first and second tubular portions are the same as those of the first container. The diameter is smaller than that of the tubular portion, and the second tubular portion of the second container has, as a part of the transmission means, a rotary shaft that penetrates the container and the eraser from the penetrating portion of the rotary shaft. Sealing means for preventing the outflow of the arcuate insulating fluid is provided, and the drive lever serves as the drive lever inside the container in the direction orthogonal to the rotation axis. A first lever that rotates integrally with the rolling shaft is provided, and a second lever that rotates integrally with the rotating shaft in a direction orthogonal to the rotating shaft is provided outside the container of the rotating shaft. A first mounting seat having a flat portion parallel to the second axis on the side opposite to the second axis with respect to the first axis is provided on the outer side of the first tubular portion of the container. A second flat portion parallel to the second axis on the side opposite to the first axis with respect to the second axis, outside the second tubular portion of the second container; A mounting seat is provided, and the drive device is mounted on a side of the first mounting seat remote from the second shaft, and in the driving device, the drive shaft has the flat surface of the first mounting seat. A shaft guide that receives a load in the direction perpendicular to the axis of the drive shaft is attached to the first mounting seat. The shaft guide is arranged such that at least a majority portion in the axial direction thereof is located on the side opposite to the drive device with respect to the flat surface portion of the first mounting seat, and the second mounting seat is provided with the first mounting seat. An auxiliary switch for detecting the operating position of the second lever is attached, which is connected to the second lever via a link, and as a part of the transmission means, the first switch of the second container.
A first floating link that connects the first lever and the ground contact moving part is provided inside the tubular part of the, and near the end of the second container near the shaft guide. The high-speed grounding switchgear according to claim 1, further comprising a second floating link that connects the second lever and the drive shaft. 11. The drive device is a hydraulic drive device,
An accumulator for preventing a change in hydraulic pressure of the hydraulic drive device is provided, and the hydraulic drive device, the accumulator, the second lever, and the auxiliary switch are the first shaft of the second container. The high-speed grounding switchgear according to claim 10, wherein the high-speed grounding switchgear is arranged on the same side with respect to. 12. A second drive device that drives the ground contact separately from the drive device, or a position measuring device that measures a drive distance of a ground contact driven by one of the drive devices is provided. 12. The second drive device or the position measuring device is arranged on the same side as the hydraulic drive device and the accumulator with respect to the first axis of the second container. High-speed ground switchgear. 13. A substantially rectangular enclosure that has four surfaces orthogonal to the flat plate and that surrounds the entire portion disposed on the second container side, of the four surfaces of the enclosure. At least two surfaces of which are provided with openable and closable openings, and in front of the opening of one opening, the hydraulic drive device, the longitudinal end of the accumulator, the second lever, and the auxiliary switch. 13. The high-speed grounding switchgear according to claim 12, wherein at least three of the second driving device and the position measuring device are positioned. 14. A pump of the hydraulic drive device and a main tank for low-pressure liquid are provided, and the pump and the main tank are the hydraulic drive device and the main shaft with respect to the first shaft of the second container. The high-speed ground switchgear according to claim 11, wherein the high-speed ground switchgear is arranged on the opposite side of the accumulator. 15. The drive shaft is arranged on the side of the ground contact of the rotary shaft, and the accumulator overlaps with the hydraulic drive device at a position farther from the hydraulic drive device with respect to the flat plate. The high-speed ground switchgear according to claim 11, which is arranged. 16. The flat plate is horizontally arranged, has four vertical surfaces orthogonal to the flat plate, and is provided with a substantially rectangular enclosure surrounding the entire portion arranged on the second container side. The surrounding body is configured to be self-supporting as a leg at an intersection of two adjacent two surfaces of four vertical surfaces, and configured to support the flat plate and the member arranged on the side of the first container. The high-speed grounding switchgear according to claim 10, wherein the high-speed grounding switch has a longest side in the direction of the main circuit or in the direction of the drive axis. 17. A handhole for inspecting the inside of the container is provided on a side surface of the first tubular portion of the second container, and the handhole has the second hole with respect to the first shaft. 11. The high-speed grounding switchgear according to claim 10, wherein the high-speed grounding switchgear is arranged at a position farther than the axis of and facing the connecting portion of the first lever and the first floating link.