JP2000134733A - Gas-insulated switch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a gas-insulated switch which can effectively utilize space in a vessel to reduce its dimensions and simplify its construction, and furthermore, can contribute to the reduction of dimensions of a gas-insulated switchgear as a whole. SOLUTION: A bus-bar conductor 102 is provided with an offset by a conductor axis 102a, which is offsetted from a vessel axis 131a of a vessel 131 of an integrated bus-bar type disconnector 101, in a direction opposite to a breaker 20 side in the vessel 131. An extended space 120 is formed on the breaker 20 side in the vessel 131 by the offset and a disconnection unit 101a which is composed of a fixed contactor 103 and a facing contactor 104 is provided approximately in parallel with the bus-bar conductor 102. A movable contactor 105, which connects/disconnects the fixed contactor 103 and the facing contactor 104 to/from each other, is provided between both the contactors 103 and 104 and is slidably inserted into the cylindrical facing contactor 104.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas insulated switchgear used in electric stations such as power plants and substations,
In particular, the present invention relates to a gas insulated switch in which the disconnecting portion of the switch and the arrangement of the ground switch are improved.

[0002]

2. Description of the Related Art In substations and switchyards installed in the vicinity of a metropolis or in a seaside area, electrical equipment constituting the substations and switchyards is replaced by S because of difficulties in obtaining land and measures against salt damage.
A gas insulated switchgear which is hermetically sealed with an insulating medium such as F ₆ gas which is very excellent in insulation and arc extinguishing properties is used.

[0003] This type of gas insulated switchgear has a configuration in which circuit breakers, disconnectors, and other necessary equipment are three-dimensionally arranged, the intervals between the equipment are narrowed, and the site area is significantly reduced. It can be configured to be significantly smaller than an air-insulated switchgear. In recent years, in consideration of environmental harmony between nature and homes, construction of substations and switchyards in buildings and underground rooms in large cities has been increasing. There is a need to reduce construction costs by minimizing area or installation volume. The use of a gas insulated switchgear is optimal in such a case.

FIG. 7 shows an example of the configuration of the above gas insulated switchgear. In FIG. 7, the circuit breaker 20 is installed such that the axis of the container 21 is perpendicular to the installation surface. A current transformer 23 is provided at an upper outlet 22a of the circuit breaker 20, and is connected to a cable head 26 via a connection bus 29, a disconnector 24, and a grounding switch 25. A main bus 28 is connected to the lower outlet 22 b of the circuit breaker 20 via a bus-bar integrated disconnector 27.

[0005] In the gas insulated switchgear configured as described above, the inside of the bus-bar integrated disconnector 27 and the main bus 28 are as shown in FIG. First, a container 1 in which an insulating gas is sealed is disposed in a direction perpendicular to the drawing, and a bus conductor 2 extending coaxially is disposed in the container 1. The fixed side electrode 3 is disposed on the axis perpendicular to the axis of the container 1 and the bus bar 2 on the circuit breaker 20 side of the bus bar 2.
The movable-side electrode 4 is disposed so as to face each other, and the disconnecting portion 8 is configured. Further, a movable contact 5 for opening and closing between the two electrodes is provided between the fixed side electrode 3 and the movable side electrode 4 of the disconnecting portion 8, and is slidably inserted into the movable electrode 4. One end of an insulating rod 6 is fixed to the movable contact 5 on the side opposite to the circuit breaker 20. The insulating rod 6 penetrates the movable electrode 4 and the other end is connected to the opening / closing mechanism A.

The opening / closing mechanism section A is disposed coaxially with the disconnecting section 8 with the bus conductor 2 interposed therebetween, and is provided inside the branch section 7 provided so as to protrude from the container 1 on the side opposite to the circuit breaker 20. It is stored in. In the opening / closing mechanism section A, the other end of the insulating rod 6 fixed to the movable contact 5 at one end is connected to the crosshead 9, and the lever 12 is fixed via the link 11 and the lever 12. It is connected to the drive shaft 13. One end of the drive shaft 13 is supported by a bearing 14 provided on the upper part of the branch portion 7.
The other end of the rotary seal portion 1 provided below the branch portion 7
5 and is connected to an operation device 16 provided outside.

[0007] In the gas insulated switch constructed as described above, the switching operation of the disconnecting section 8 is performed as follows.
That is, the operating device 16 is driven to rotate the drive shaft 13, and the insulating rod 6 and the movable contact 5 are reciprocated in the left and right directions in the figure via the lever 12, the link 11, and the crosshead 9, thereby fixing the operation. An opening and closing operation between the side electrode 3 and the movable side electrode 4 is performed.

[0008]

However, the conventional gas insulated switch having the above configuration has the following problems to be solved. That is, the container 1
Opening and closing mechanism part A in a branch part 7 protruding to the side of
Are stored, as shown in FIGS. 7 and 8,
Container 1 dimension L ₁₁ of the bus integral disconnecting switch 27 is increased. Since it is necessary to provide a space between the operation device 16 and the cable head 26 in order to secure an operation space for the operation device 16, as shown in FIG.
₁₂ becomes larger, and the whole apparatus becomes larger.

Further, it is necessary to arrange a grounding switch (not shown) between the bus-side disconnector 27 and the circuit breaker 20. As a method of disposing such a grounding switch, a grounding switch is separately provided (stored in a separate container), and the bus-side disconnector 27 and the grounding switch are combined and stored in one container. There are three methods of combining the circuit breaker 20 and the grounding switch and storing them in one container. However, any of these methods leads to an increase in the size of the device.

[0010] That is, in the case of, for separate container is required, a dimension and bus side disconnector 27 combined grounding switch becomes larger than the dimension L ₁₁ of the container 1 of the bus-side disconnector 27. In the case of, the number of containers is the same, but the disconnecting portion 8 of the bus-side disconnector 27 and the circuit breaker 2 shown in FIG.
Since there is no space, such as disposing the grounding switch between the 0 should be greater than the current dimension L ₁₁ of the container 1. In the case of, on the other hand, the size of the bus-side disconnector 27 itself is not affected, but the breaker 20 may be enlarged because the grounding switch is incorporated in the breaker 20.

The present invention has been proposed to solve the above-mentioned drawbacks of the prior art, and an object of the present invention is to make effective use of the space in a container, to reduce the size of a switch and to reduce the structure. An object of the present invention is to provide a gas insulated switchgear which can be simplified and which can contribute to downsizing of the entire gas insulated switchgear.

[0012]

In order to achieve the above object, according to the present invention, a bus conductor is housed in a container filled with an insulating gas, and a fixed contact portion and a busbar conductor are arranged facing the fixed contact portion. A bus-shaped conductor and a disconnector are provided in a gas-insulated switch having a tubular opposed contact portion provided with a movable contact that is slidably inserted into the opposed contact portion and opens and closes between the contact portions. This is an improvement in the arrangement of the parts. That is, the disconnecting portion is arranged substantially parallel to the bus conductor in a space which is expanded by forming the axis of the bus conductor eccentrically with respect to the axis of the container. According to this configuration, the arrangement space of the disconnecting portion can be secured only by disposing the bus bar conductor without enlarging the container, so that the space in the container can be effectively used.

According to a second aspect of the present invention, in the gas insulated switchgear of the first aspect, a rack is provided on the movable contact, and an insulating rod having a pinion that meshes with the rack is provided. By operating with the driving force of an operating device provided outside the container,
The movable contact is operated via a rack and a pinion. According to this configuration, the rack provided between the insulating rod and the movable contact
Since the rotational driving force can be easily converted to the linear driving force by the pinion mechanism, the insulating rod can be directly rotated by the operating device. Accordingly, there is no need to connect the insulating rod to the drive shaft that is rotated by the driving force of the operating device via the link or the lever, so that the configuration of the opening and closing mechanism can be greatly simplified.

According to a third aspect of the present invention, in the gas insulated switchgear according to the second aspect, the rack is provided at a portion of the movable contact opposite to the bus conductor. According to this configuration, it is possible to eliminate the electrical influence on the bus conductor caused by the rack.

According to a fourth aspect of the present invention, in the gas insulated switch of the first aspect, a movable contact for a grounding switch is provided at the other end of the movable contact in contact with the fixed contact portion. A fixed contact portion for the grounding switch is provided on the flange portion facing the movable contact, thereby forming a three-position disconnector in which the disconnecting portion and the movable contact of the grounding switch operate integrally. And
According to this configuration, since the disconnecting portion and the movable contact of the grounding switch are integrally provided, the number of components can be reduced and the arrangement space can be reduced as compared with a case where the disconnecting portion and the movable contact are individually provided. Therefore, the configuration in the container can be simplified, and the space in the container can be more effectively used.

According to a fifth aspect of the present invention, in the gas insulated switch of the fourth aspect, the movable contact for the grounding switch comprises:
The movable contact of the disconnecting portion has a smaller diameter than the contact end. According to this configuration, since the diameter of the movable contact for the grounding switch is smaller than the diameter of the movable contact in the disconnecting portion, the driving force of the disconnecting portion and the grounding switch can be reduced, and the fixed contact portion for the grounding switch can also be reduced. Can be smaller. Therefore, the cost required for the driving force can be reduced, and the space in the container can be more effectively used.

According to a sixth aspect of the present invention, the difference in diameter between the disconnecting portion and the movable contact of the grounding switch in the gas insulated switch of the fifth aspect is used, and the movable contact for the grounding switch is used. And a shield portion for reducing an electric field is provided on the side of the bus conductor. According to this configuration,
It is possible to eliminate the electric influence on the bus conductor caused by the movable contact for the earthing switch.

The invention according to claim 7 is the invention according to claim 1 or 4.
The gas-insulated switch described above is characterized in that the container is deformed in a plane direction orthogonal to the axis thereof, according to the internal arrangement. According to this configuration, the container can be miniaturized as much as possible by deforming the container according to the arrangement of the bus conductor, the disconnecting portion, and the grounding switch. For example, it is generally considered that the bus conductor and the disconnecting part are arranged side by side in the horizontal direction. In this case, if the cross-sectional shape of the container is a perfect circle, there is a wasteful space in the vertical direction of the container. Space will be created. By deforming the container so as to eliminate such an empty space, the vertical dimension of the container can be reduced. In this case, the shape of the container may be, for example, elliptical, but various shapes can be selected, including the positional relationship with peripheral devices.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A gas-insulated switch according to the present invention will be described below with reference to the drawings, particularly to one embodiment to which all the inventions of claims 1 to 7 are applied. The same parts as those of the prior art shown in FIG. 7 and FIG.

[1. Configuration] FIGS. 1 and 2 are views showing a gas insulated switchgear according to the present embodiment. FIG. 1 is a transverse sectional view, and FIG. 2 is a longitudinal sectional view of FIG.

First, a configuration corresponding to the first aspect of the present invention will be described. That is, as shown in FIG. 1, a bus conductor 102 is provided in a container 131 of an integrated bus disconnector 101 filled with an insulating gas (for example, SF ₆ gas).
The conductor shaft 102a is eccentrically arranged on the opposite side of the circuit breaker 20 with respect to one container shaft 131a. Due to such eccentric arrangement of the bus conductor 102, the container 13
An expansion space 120 is formed on the side of the circuit breaker 20 in FIG.

The disconnecting portion 101a is disposed in the expansion space 120 substantially in parallel with the bus conductor 102. That is, the fixed contact portion 103 substantially parallel to the bus conductor 102 is provided on the conductor 102b branched from the bus conductor 102 to the circuit breaker 20 side.
A cylindrical opposing contact portion 104 is disposed at a position opposing to the busbar 3, and forms a disconnecting portion 101 a substantially parallel to the bus conductor 102. Then, the fixed contact portion 103 and the opposed contact portion 10
A movable contact 105 for opening and closing between the two electrodes is provided between the movable contact 4 and the movable contact 4, and is slidably inserted into the cylindrical opposed contact portion 104.

On the circuit breaker 20 side of the opposing contact portion 104, an opposing contact portion conductor 104a extending from the opposing contact portion 104 in the orthogonal direction is led out. This opposing contact portion conductor 1
04a is an insulating spacer 1 with respect to a branch flange 131b provided on the container 131 for connection with the circuit breaker 20.
Insulated and supported by 35. And then claim 2,
A configuration corresponding to the inventions described in 3 and 7 will be described. That is, as shown in FIG. 2, the movable contact 105 has an outer peripheral portion on the circuit breaker 20 side (the side opposite to the bus conductor 102).
Is provided with a groove 105a, and a rack 132 is formed in the groove 105a. On the other hand, an insulating rod 133 is provided which extends in a direction orthogonal to a plane on which the bus conductor 102 and the facing contact portion 104 are arranged. This insulating rod 133 is formed by an insulating joint 133a and joining rods 134 and 138 integrally connected to both ends thereof.

Here, a pinion 136 that engages with the rack 132 of the movable contact 105 is connected to the joining rod 134 at one end of the insulating rod 133, and the pinion 136 bears a bearing against the opposing contact portion 104. Member 137
a, 137b so as to be rotatable. Also,
The joining rod 138 at the other end of the insulating rod 133 is
Operating device 1 provided outside of container 131 via 39
16. That is, one end of the main shaft 139 is connected to the joining rod 138, and the other end of the main shaft 139 is
It is led out of the container 131 through the rotary seal 115 provided on the container 131 and connected to the operating device 116.

Further, as shown in FIG.
Are deformed in a plane direction orthogonal to the container shaft 131a. That is, in the present embodiment, FIG.
As shown in the figure, the bus conductor 102 and the disconnecting portion 101a are arranged side by side in the horizontal direction.
If the cross-sectional shape is a perfect circle, a useless empty space will be generated in the vertical direction of the container 131. From the viewpoint of eliminating such empty space, in the present embodiment, the size of the container 131 in the vertical direction is reduced, and the container 131 is deformed into an elliptical shape as an example. Thereby, the container 131
Is reduced as much as possible, and a predetermined insulation performance between the busbar conductor 102 and the disconnecting portion 101a and the container 131 is secured.

Subsequently, a configuration corresponding to the invention according to claims 4 to 6 will be described. That is, as shown in FIG. 1, the movable contact 105 inserted into the cylindrical opposed contact portion 104
The movable contact 141 for the grounding switch having an outer diameter d smaller than the outer diameter D of the movable contact 105 at the other end while being movable toward and away from the fixed contact portion 103 of the disconnecting portion 101a at one end thereof. Are provided integrally. A fixed contact portion 142 for the grounding switch is disposed on the flange 131c of the container 131 facing the movable contact 141 for the grounding switch, and forms the grounding switch 140 together with the movable contact 141 for the grounding switch. are doing. With such a configuration, the movable contact 105 and the movable contact 14 are provided between the opposed contact portion 104 and the electrode portion of the fixed contact portion 142 for the ground switch.
Numeral 1 slides integrally to open and close between the electrode portions. Further, as described above, the movable contact 141 for the grounding switch is connected to the movable contact 105 of the disconnecting portion 101a.
Has a smaller outer diameter d than the outer diameter D of the movable contact 1 as shown in FIG.
An electric field alleviating shield portion 141a having a predetermined curvature is provided on the side of the bus conductor 102 at 41.

[2. Operation] In the gas insulated switch having the above configuration, the function of the three-position switch can be satisfied by performing the following operation. First, the disconnecting operation of the disconnecting portion 101a, that is, from the state where the disconnecting portion 101a is “ON” and the grounding switch 140 is “OFF” as shown in FIGS. 1 and 2, as shown in FIG. The operation when the ground switch 140 shifts to the “off” state when 101 a is “off” will be described.

In the state shown in FIG. 1, the main shaft 139 is driven by the driving force of the operating device 116 provided outside the container 131.
When (FIG. 2) is rotated counterclockwise in FIG. 1, the insulating rod 133 (FIG. 2) and the pinion 1
36 also rotates counterclockwise in FIG. With the rotation of the pinion 136, the rotation is converted into a linear motion by a rack and pinion mechanism including the pinion 136 and the rack 132 meshing with the pinion 136.
The movable contact 105 of the disconnecting portion 101a having the rack 132 and the movable contact 141 for the grounding switch provided therewith are integrally moved to the right (the longitudinal direction of the movable contact 105). Move in the direction. Then, when these movable contacts 105 and 141 have moved by a predetermined distance, the driving of the operating device 116 stops. At this time, as shown in FIG.
By storing both of them in the opposing contact portion 104, the grounding switch 140 is maintained in the “off” state, while the disconnecting portion 101a is in the “off” state.

Next, from the on-operation of the grounding switch 140, that is, from the state where the disconnecting portion 101a is "off" and the grounding switch 140 is "off" as shown in FIG.
The operation when the disconnecting unit 101a is turned off and the grounding switch 140 shifts to the on state will be described.

In the state shown in FIG. 4, the main shaft 139 is driven by the driving force of the operating device 116 provided outside the container 131.
When (FIG. 2) is rotated counterclockwise in FIG. 4, the insulating rod 133 (FIG. 2) and the pinion 1
36 also rotates counterclockwise in FIG. With the rotation of the pinion 136, the rotational motion is converted into a linear motion by the rack and pinion mechanism, and the rack 132 is moved to the position shown in FIG.
The movable contact 105 of the disconnecting portion 101a having the rack 132 and the movable contact 141 for the grounding switch provided therewith are integrally moved to the right (the longitudinal direction of the movable contact 105). Move in the direction. Then, when these movable contacts 105 and 141 have moved by a predetermined distance, the driving of the operating device 116 stops. At this time, as shown in FIG. 5, the movable contact 141 for the grounding switch is housed in the fixed contact 142 provided on the flange 131c of the container 131, and the disconnecting portion 101a is maintained in the "off" state. On the other hand, the earthing switch 140 is turned on and the operation is completed.

Further, in the operation opposite to the above operation, the main shaft 139 and the insulating rod 13 are driven by the driving force of the operating device 116.
By rotating the pinion 136 and the pinion 136 in the clockwise direction in the figure, the movable contacts 105 and 141 are moved leftward in the figure, and stopped when they have moved a predetermined distance.

[3. Effects] According to the gas-insulated switch described above, the following effects can be obtained. First, the conductor shaft 102a of the busbar conductor 102 is connected to the container shaft 131a of the container 131.
Eccentric arrangement with respect to the circuit breaker 2 in the container 131.
0, an expansion space 20a is provided.
By configuring the disconnecting portion 101a and the grounding switch 140 in 20, the space in the container 131 can be effectively used.

The disconnecting portion 101a and the earthing switch 14
Since the movable contacts 105 and 141 of the zero form a three-position switch that operates integrally, the configuration inside the container 131 is simplified as much as possible while incorporating both the disconnecting portion 101a and the grounding switch 140. Container 13
The space within 1 can be used more effectively. In this case, since the movable rods 105 and 141 are driven by the insulating rod 133 and the rack and pinion mechanism, the driving shaft 13 is connected to the driving shaft 13 via a link or a lever as in the related art shown in FIG. The configuration of the opening and closing mechanism can be greatly simplified as compared with the case where the insulating rods are connected.

Further, the rack 132 is disposed on the movable contact 105 on the side opposite to the bus conductor 102, and the shield 141a for reducing the electric field is provided on the bus conductor 102 side of the movable contact 141 for the earthing switch. In addition, the operation of the disconnecting portion 101a and the grounding switch 140 can be reliably performed without being electrically affected, and the quality of the entire gas insulated switch can be stabilized.

Among them, advantages of the arrangement of the rack 132 are as follows. First, the disconnecting portion 101 as described above
a in the disconnecting operation of the movable contact 10 of the disconnecting portion 101a.
When 5 moves from the fixed contact portion 103 to the inside of the opposing contact portion 104, the rack 132 formed in the groove 105a of the movable contact 105 moves in the disconnecting portion 101a. In this case, unlike the present embodiment, assuming that rack 132 is disposed near bus conductor 102, there is a possibility that rack 132 may have an electrical effect on bus conductor 102. On the other hand, in the present embodiment, since the rack 132 is disposed on the opposite side to the bus conductor 102, that is, at the position farthest from the bus conductor 102, the rack 132 is in the middle of the "disconnect" operation of the disconnecting portion 101a. No electric adverse effect on the bus conductor 102 such as restriking occurs.

The advantages provided by providing the shield portion 141a for alleviating the electric field are as follows. First, when the movable contact 141 for the grounding switch 140 moves rightward in the on-operation of the grounding switch 140 as described above, the movable contact 141 projects from the opposing contact portion 104. In this case, unlike the present embodiment, if it is assumed that the shield portion 141a is not provided on the movable contact 141, the projecting of the movable contact 141 may cause an electrical influence on the bus conductor 102. There is. On the other hand, in the present embodiment, utilizing the fact that the movable contact 141 has an outer diameter d smaller than the outer diameter D of the movable contact 105 of the disconnecting portion 101a, the movable contact 141 is used.
1 having a predetermined curvature on the side of the bus conductor 102
41a, the shield portion 141a
The shield effect does not cause an adverse electrical effect on the bus conductor 102, such as a ground fault.

On the other hand, FIG. 6 is a configuration diagram showing a configuration example of a gas insulated switchgear configured using the bus-bar integrated disconnector 101 according to the present embodiment. That is, in the present embodiment, since the operating device 16 can be protruded in the vertical direction of the container 131 and does not protrude toward the container cable head 26, as shown in FIG. dimension L ₂₁ of the bus integral disconnecting switch 101 in accordance with will become significantly smaller (L ₂₁ <L ₁₁₎ as compared with the conventional dimension L ₁₁ of the bus integral disconnecting switch 27 shown in FIG. As a result, the connection bus 29 where conventionally required for providing a space between the busbar integral disconnector 27 and the cable head 26 is not required, installation measurements L ₂₂ of the entire apparatus, FIG. 7 becomes considerably smaller than the conventional installation dimension L ₁₂ as shown (L ₂₂ <L _12), it can reduce the overall size of the device. Therefore, the installation space of the entire gas insulated switchgear can be reduced.

In addition, since the shape of the container 131 is reduced vertically and deformed into an elliptical shape or the like in accordance with the horizontal arrangement of the bus conductor 102 and the disconnecting portion 101a, the container 131 is connected to the container 101 and the disconnecting portion 101a. The dimensions of the container 131 can be reduced as much as possible while ensuring a predetermined insulating performance between the containers 131. As a result, the circuit breaker 2 shown in FIG.
0 of the upper and lower tap portions 22a, the dimension L ₂₃ between 22b are upper and lower tap portions 22a of the conventional circuit breaker 20 shown in FIG. 7,
It is smaller than the dimension L ₁₃ between 22b (L ₂₃ <
L _13), the height of the breaker 20 is low. Therefore, the height L ₂₄ of the entire apparatus is also lower than the conventional height L ₁₄ as shown in FIG. 7 (L ₂₄ <L ₁₄ ). Therefore, the installation space of the entire gas insulated switchgear can be further reduced, which leads to cost reduction.

[4. Other Embodiments] The present invention
The present invention is not limited to the above embodiment, and various other embodiments can be implemented within the scope of the present invention. For example, a specific arrangement of the bus conductor and the disconnecting portion, a specific configuration of the disconnecting portion, and the like can be appropriately selected. In addition, a specific configuration for driving the movable contact can be appropriately selected. However, generally, since an excellent effect is obtained as in the above-described embodiment, the insulating rod and the rack It is desirable to use a pinion mechanism. On the other hand, a configuration is also conceivable in which the disconnecting portion and the movable contact of the grounding switch are separately provided instead of being integrally provided. However, in general, as described in the above-described embodiment, an excellent effect is obtained. It is desirable that the movable contact of the unit and the grounding switch is provided integrally. Furthermore, the specific shape of the container is not limited to an elliptical shape, but can be freely selected according to the internal arrangement.

[0040]

As described above, according to the present invention,
By arranging the bus conductor axis eccentrically from the container axis to expand the space on one side of the bus conductor and arranging the disconnection part in this space, the space in the container is effectively used,
It is possible to provide a gas insulated switch that can reduce the size of the switch and simplify the structure, and can contribute to downsizing of the entire gas insulated switch.

Further, the space can be more effectively used by forming a three-position drive disconnecting portion intermittently linked to the space and a grounding switch. In particular, by using a three-position switch that is driven by a rack and pinion mechanism and configured such that the disconnecting portion and the movable contact of the grounding switch operate integrally, the operation of the disconnecting portion and the grounding switch is electrically controlled. The operation can be performed reliably without being affected, and a gas insulated switchgear having stable quality can be provided. Furthermore, by shrinking the container in the vertical direction, the size between the upper and lower outlets of the circuit breaker can be reduced, and the height of the gas insulated switchgear can be reduced.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing one embodiment of a gas-insulated switch according to the present invention.

FIG. 2 is a longitudinal sectional view of FIG.

FIG. 3 is an enlarged perspective view showing a structure around a movable contact of the grounding switch of FIG. 1;

FIG. 4 is a cross-sectional view illustrating an operation of the gas insulated switch of FIG. 1, particularly, a disconnection operation of a disconnection portion from the state of FIG.

5 is a cross-sectional view illustrating the operation of the gas-insulated switch of FIG. 1, in particular, the ON operation of the grounding switch from the state of FIG. 4;

FIG. 6 is a configuration diagram showing a gas insulated switchgear to which the gas insulated switch of FIG. 1 is applied.

FIG. 7 is a configuration diagram showing a gas-insulated switchgear to which a conventional gas-insulated switch is applied.

FIG. 8 is a longitudinal sectional view showing an example of a conventional gas insulated switch.

[Description of Signs] 1 ... Container 2 ... Bus conductor 3 ... Fixed side electrode 4 ... Movable side electrode 5 ... Movable contact 6 ... Insulating rod 7 ... Branch section 8 ... Disconnect section 9 ... Cross head 11 ... Link 12 ... Lever 13 ... Driving shaft 14 ... Bearing 15 ... Rotating seal part 16 ... Operating device 20 ... Circuit breaker 21 ... Container 22a, 22b ... Outlet part 23 ... Current transformer 24 ... Disconnector 25 ... Ground switch 26 ... Cable head 27 ... Integral with the busbar Shaped disconnector 28 ... Busbar 29 ... Connection busbar 101 ... Busbar integrated disconnector 101a ... Disconnect part 102 ... Busbar conductor 102a ... Conductor shaft 102b ... Conductor 103 ... Fixed contact part 104 ... Opposite contact part 104a ... Opposite contact part conductor 105 ... Movable contact 105a Groove 115 Rotary seal 116 Operating device 120 Expansion space 131 Container 131a Container shaft 131b Branch flange 31c ... flange 132 ... rack 133 ... insulating rod 133a ... insulating joint 134 ... connecting rod 135 ... insulating spacer 136 ... pinion 137a ... bearing member 137b ... bearing member 138 ... connecting rod 139 ... main shaft 140 ... grounding switch 141 ... movable contact 141a: shield part 142: fixed contact part

Claims (7)

[Claims] 1. A bus bar conductor is accommodated in a container filled with an insulating gas, and a fixed contact portion, a cylindrical opposed contact portion disposed to face the fixed contact portion, and slidably inserted into the opposed contact portion. In the gas-insulated switch provided with a movable contact that opens and closes between both contact portions to form a disconnecting portion, a space that is expanded by forming an axis of the bus conductor eccentrically with respect to an axis of the container. Wherein the disconnecting portion is disposed substantially parallel to the bus conductor. 2. A rack is provided on the movable contact, and an insulating rod having a pinion meshing with the rack is provided, and the insulating rod is operated by a driving force of an operating device provided outside the container. by doing,
The gas insulated switch according to claim 1, wherein the movable contact is operated via the rack and the pinion. 3. The gas insulated switch according to claim 2, wherein the rack is provided on a portion of the movable contact opposite to the bus conductor. 4. A movable contact for a grounding switch is provided at the other end of the movable contact in contact with the fixed contact portion, and a flange for the grounding switch is provided on a flange of the container facing the movable contact. 2. The gas insulated switch according to claim 1, wherein a fixed contact portion is provided, thereby forming a three-position disconnector in which the disconnecting portion and the movable contact of the ground switch operate integrally. 5. The movable contact for the grounding switch,
The gas-insulated switch according to claim 4, wherein the disconnector has a smaller diameter than the movable contact. 6. The gas-insulated switch according to claim 5, wherein a shield portion for reducing an electric field is provided on the bus conductor side of the movable contact for the grounding switch. 7. The gas insulated switch according to claim 1, wherein the container is deformed in a plane direction orthogonal to an axis thereof according to an arrangement inside the container.