JPH1146418A - Switchgear - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to downsize the external dimensions of a switchgear while making it maintain the same functions before, by letting a turning switch function as a disconnecting switch and a grounding switch. SOLUTION: A turning switch 50, when its movable blade 52 contacts a fixed contact 54, is connected to a cable head 41 via a lightening rod 48, a voltage transformer 49 and a moving electrode 53. Eventually when the movable blade 52 is turned and stopped in the middle of the moving path in the circumferential direction, it is insulated because of the break of an electric circuit. Furthermore, when the movable blade 52 has been turned and frought into contact with a fixed contact 55, the able head 41 is grounded with a cover 46. A rotary switch 60, when its movable blade 62 contacts a fixed contact 64, is connected to the cable head 41 via an insulating spacer 44 connected to a breaker and a moving electrode 63. Eventually when the movable 62 is turned and stopped in the middle of the moving path in the circumferential direction, it is insulated because of the break of an electric circuit. Furthermore, once the movable blade 62 has been turned and frought into contact with a fixed contact 65, the insulating spacer 44 is grounded with a cover 47.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switchgear such as a gas-insulated switchgear used for power transmission and distribution and power reception and transformation.

[0002]

2. Description of the Related Art FIG. 29 is a cross-sectional view of a conventional gas insulated switchgear of this type described in, for example, Japanese Utility Model Laid-Open Publication No. 3-80609, and FIG. 30 is a connection diagram thereof. In this gas insulated switchgear, each device described below is housed together with an insulating gas.
It is composed of seed containers 12a, 12b and 12c, and necessary connections are made between the containers.

The circuit breaker 2, the current transformer 3 and the earthing switches 7a and 7b are accommodated in the container 12a. Container 12b
Accommodates buses 1a and 1b and disconnectors 8a and 8b. The container 12c has a cable head 4,
The lightning arrester 5, the earthing switch 7c, and the disconnecting switches 8c and 8d are housed therein, and further, a connection to the voltage transformer 6 is attached. 11 is a common base, 13 is a breaker operating device box, 1
5 is a cable lead-in part.

Although FIG. 1 shows a simplified single-phase structure, it actually has a three-phase structure.
Each component device from to the buses 1a and 1b is compactly arranged.

Incidentally, one of the present inventions focuses mainly on the container 12c for accommodating the cable head 4 and the lightning arrester 5 among the above gas insulated switchgears. Further, a disconnecting switch 8d for disconnecting the cable head 4 from the lightning arrester 5 and the like is required so that a high voltage applied to the cable head 4 is not applied to the lightning arrester 5 or the voltage transformer 6 at the time of a factory test or a field test. Become. Further, disconnectors 8c and 8d for disconnecting the cable head 4 from the arrester 5, the voltage transformer 6, and the circuit breaker 2 are required so that the voltage is not applied to the lightning arrester 5, the voltage transformer 6, and the circuit breaker 2 during the DC voltage test of the cable. Further, a grounding switch 7c for grounding the cable head 4 is required. Therefore, the container 12c includes, in addition to the cable head 4 and the lightning arrester 5, a grounding switch 7 required in connection with them.
c, disconnectors 8c and 8d are also accommodated simultaneously.

[0006]

A conventional gas insulated switchgear, in particular, a cable insulated switchgear in which a cable head, a lightning arrestor, and a disconnector and a grounding switch required in connection therewith are integrally housed in a container. Is configured as described above, there is a certain limit in reducing the outer shape. That is, although not shown in detail in FIG. 5, the disconnecting switch and the grounding switch have independent structures, and their drive operation mechanisms also have independent structures. Therefore, each can be assembled by independently adjusting the arrangement with the peripheral device. As a result, the volume of the container accommodating all these devices at once, and therefore the external dimensions thereof, tend to increase.

The present invention has been made to solve the above problems, and has as its object to reduce the outer dimensions of a gas insulated switchgear having the same function as the conventional one.

[0008]

According to a first aspect of the present invention, there is provided a switchgear comprising: a power introduction unit from outside; a built-in electric device; a disconnector for electrically connecting and disconnecting the power introduction unit from the built-in electric device;
And in a switching device containing a grounding switch for electrically connecting and disconnecting the power introduction unit and the grounding unit in a container, a drive shaft, a movable blade rotated by the drive shaft,
A movable pole that supports the drive shaft and is electrically connected to the movable blade; a first pole and a first pole that are arranged at a predetermined distance from the movable pole and at a predetermined distance from each other and are capable of coming into contact with and separating from the movable blade; A rotary switch comprising two fixed contacts, wherein the power introduction unit is electrically connected to the movable pole, the built-in electric device is electrically connected to the first fixed contact, and the ground is connected. Part is electrically connected to the second fixed contact, and the movable blade is rotated to an intermediate position between the first fixed contact, the second fixed contact, and both contacts, whereby the rotary switch is rotated. Function as the disconnector and the earthing switch.

[0009] In the opening and closing device according to claim 2, in claim 1, an electric power introducing portion is arranged at one axial end of the cylindrical container, and a built-in electric device is arranged at the other axial end. In addition, a rotary switch is arranged between the power introduction unit and the built-in electric device such that a drive shaft thereof is substantially perpendicular to an axial direction of the container.

According to a third aspect of the present invention, there is provided a switchgear for externally introducing a power introduction unit, a built-in electric device, a connection unit to an adjacent electric device, and electrically connecting and disconnecting the power introduction unit and the built-in electric device. A first grounding switch for electrically connecting and disconnecting the power introduction unit and the first grounding unit, and a second disconnection switch for electrically connecting and disconnecting the power introduction unit and the connection unit. And a second grounding switch for electrically connecting and disconnecting the connecting part and the second grounding part, the switching ground being housed in a container, wherein a drive shaft and a movable member rotated by the drive shaft are provided. A blade, a movable pole that supports the drive shaft and is electrically connected to the movable blade, and a movable pole separated from the movable pole by a predetermined distance and separated from the movable pole by a predetermined distance. Two rotary switches consisting of the first and second fixed contacts (first and second fixed contacts) 2 of revolvable switch) provided, the power lead portions electrically connected to the first fixed contact of the movable electrode and the second revolvable switchgear first revolvable switch above,
The built-in electric device is electrically connected to a first fixed contact of the first rotary switch, and the first grounding portion is connected to the first fixed contact.
Electrically connected to the second fixed contact of the rotary switch, and the connection portion is electrically connected to the movable pole of the second rotary switch, and the second ground portion is The movable blade is connected to a second fixed contact of a second rotary switch, and the movable blade is connected to the first fixed contact.
By rotating to the intermediate position between the fixed contact, the second fixed contact and the two contacts, the first rotary switch functions as the first disconnector and the first grounding switch. The second rotary switch functions as the second disconnecting switch and the second grounding switch.

According to a fourth aspect of the present invention, there is provided the opening and closing device according to the third aspect, wherein a power introduction unit is disposed at one axial end of the cylindrical container, and a built-in electric device is disposed at the other axial end. The first and second rotary switches are arranged between the power introduction unit and the built-in electric device such that the drive shaft thereof is substantially perpendicular to the axial direction of the container.

In the switching device according to a fifth aspect of the present invention, the first and second rotary switches are arranged side by side in the diameter direction of the container. The second fixed contact is located at one end in the diameter direction, and the second fixed contact of the second rotary switch is located at the other end in the diameter direction.

According to a sixth aspect of the present invention, in the switching device according to the fifth aspect, the movable pole of the first rotary switch and the first fixed contact of the second rotary switch are integrally formed. And is supported and fixed by the power introduction unit, and the movable pole of the second rotary switch is supported and fixed by the connection unit.

According to a seventh aspect of the present invention, in the opening and closing device according to the fifth or sixth aspect, an opening is provided at one end in a diametrical direction of the container and a first lid for closing the opening is provided at the other end of the diametrical direction. , An opening and a second lid for closing the opening are provided, and the second fixed contact of the first rotary switch is supported and fixed by the first lid. The second fixed contact is supported and fixed by the second lid.

According to an eighth aspect of the present invention, there is provided an opening / closing device according to any one of the fifth to seventh aspects, wherein the operating mechanism for rotating and driving the drive shaft from outside the container is the same as that of the first rotating type switch. The second rotary switch is disposed at one end of the drive shaft, and is disposed at the other end of the drive shaft.

According to a ninth aspect of the present invention, there is provided a switchgear according to any one of the third to eighth aspects, wherein the power introduction part is a cable head disposed through the container, and the built-in electric equipment is a lightning arrester and a voltage transformer. One or both.

According to a tenth aspect of the present invention, there is provided a switchgear, wherein a power introduction unit from outside, a built-in electric device including a voltage transformer and a lightning arrester, a connection unit to an adjacent electric device, the power introduction unit, the built-in electric device and the first A first grounding switch for electrically connecting and disconnecting the grounding unit, a disconnector for electrically connecting and disconnecting the power introduction unit and the connecting unit, and an electrical connection between the connecting unit and the second grounding unit. In a switchgear having a second grounding switch for performing close contact and separation accommodated in a container, a first drive shaft, a first movable blade rotated by the first drive shaft, 1
A first movable pole which supports the drive shaft of the first movable blade and is electrically connected to the first movable blade; and a fixed contact which is separated from the first movable pole by a predetermined distance and can be brought into contact with and separated from the first movable blade. And a second drive shaft, a second movable blade rotated by the second drive shaft, and a second drive shaft supporting the second drive shaft. A second movable pole electrically connected to the movable blade of the second movable blade, and a second movable pole electrically separated from the second movable pole by a predetermined distance and separated from the second movable pole by a predetermined distance. A second rotary switch including a first and a second fixed contact, wherein the power introduction unit and the built-in electric device are electrically connected to the first movable pole and the first fixed contact. Electrically connecting the first grounding part to the fixed contact, and connecting the connecting part to the second movable pole. Electrically connecting, the second grounding portion is electrically connected to the second fixed contact, the first
The first movable switch functions as the first ground switch by rotating the movable blade of the second movable blade to contact and separate from the fixed contact, and the second movable blade is connected to the first fixed switch. By rotating to the intermediate position between the contact, the second fixed contact, and both contacts, the second rotary switch functions as the disconnecting switch and the second grounding switch.

According to an eleventh aspect of the present invention, there is provided the switchgear according to the tenth aspect, wherein one of a voltage transformer and a lightning arrester is disposed at one axial end in the cylindrical container, And the other of the voltage transformer and the lightning arrester is disposed between the voltage transformer and the lightning arrester so that the drive shaft thereof is substantially perpendicular to the axial direction of the container.
And a second rotary switch, and a power introduction unit is disposed radially through the container from between the voltage transformer and the surge arrester.

[0021] In a twelfth aspect of the present invention, in the eleventh aspect, the connecting part is disposed at one end in the diameter direction of the container, and the power introduction part is disposed at the other end in the diameter direction. is there.

According to a thirteenth aspect of the present invention, there is provided the switchgear according to any one of the tenth to twelfth aspects, wherein the power introduction unit is an air connection bushing disposed through the container. .

According to a fourteenth aspect of the present invention, there is provided a switchgear according to any one of the tenth to twelfth aspects, wherein the power introduction unit is a cable head disposed through the container.

According to a fifteenth aspect of the present invention, there is provided a switchgear, comprising: a cable head from outside; a built-in electric device including a voltage transformer or a lightning arrester; a connection portion to an adjacent electric device; A first ground switch for electrically connecting and disconnecting the ground unit, a disconnector for electrically connecting and disconnecting the power introduction unit and the connection unit, and an electrical connection between the connection unit and a second ground unit. In a switchgear having a second grounding switch for contact and separation accommodated in a container, a first drive shaft, a first movable blade rotated by the first drive shaft, A first movable pole which supports the drive shaft of the first movable blade and is electrically connected to the first movable blade; and a fixed contact which is separated from the first movable pole by a predetermined distance and can be brought into contact with and separated from the first movable blade. A first rotary switch comprising: and a second drive shaft; A second movable blade that is rotated by the second drive shaft, a second movable pole that supports the second drive shaft and is electrically connected to the second movable blade, A second rotary switch comprising first and second fixed contacts which are arranged at a predetermined distance from the movable pole and at a predetermined distance from each other and are capable of contacting with and separating from the second movable blade. Electrically connecting the cable head and the built-in electrical device to the first movable pole and the first fixed contact, electrically connecting the first grounding portion to the fixed contact, Is electrically connected to the second movable pole, the second grounding part is electrically connected to the second fixed contact, and the first movable blade is rotated to contact and separate from the fixed contact. By doing so, the first rotary switch functions as the first ground switch, By rotating the second movable blade to an intermediate position between the first fixed contact, the second fixed contact, and both contacts, the second rotary switch is connected to the disconnector and the second ground. It is designed to function as a switch.

In the opening and closing device according to a sixteenth aspect, in the fifteenth aspect, a built-in electric device is arranged at one axial end of the cylindrical container, and a cable head is arranged at the other axial end. First and second rotary switches are arranged between the built-in electric device and the cable head such that a drive shaft thereof is substantially perpendicular to an axial direction of the container.

The switchgear according to claim 17 is a first container accommodating a bus and a bus disconnector, which is disposed adjacent to the first container and is electrically connected to the bus disconnector. A second container accommodating the circuit breaker, and the container according to any one of claims 3 to 16, wherein the circuit breaker is disposed adjacent to the second container as an adjacent electric device. is there.

Further, in the switching device according to the eighteenth aspect, in the seventeenth aspect, the bus bar and each container are provided for each phase to be a phase separation type.

[0026]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 FIG. FIG. 1 is a configuration diagram showing a cross section of a gas insulated switchgear according to Embodiment 1 of the present invention. As in the conventional case, three types of containers 30, 31, and 32 are provided, each housing an apparatus described below together with an insulating gas. Among them, the container 30 includes disconnectors 33a and 33b and a bus 34.
a and 34b are accommodated. A circuit breaker 35 is provided in the container 31.
Is housed. 36 is a breaker operating device box, 3
7 is a control box of the gas insulated switchgear. Since the above is not the subject of the present application, further detailed description will be omitted, and the following will mainly describe the container 32 and the accommodation device thereof, which are the subject of the present application.

The container 32 is mounted on a cable substrate 38 and includes a lid 32a, an upper container 32b, and a lower container 32c. 39 is a current transformer provided outside the container 32, and 40 is a cable. FIG. 2 shows the devices housed in the container 32 and the connections between them, which will be described in conjunction with FIG.

Reference numeral 41 denotes a cable head which is a power introduction unit disposed at a lower end which is one end in the axial direction of the container 32. Reference numeral 50 denotes a first rotary switch supported and fixed by a conductor 42 from the cable head 41. is there. Here, details of the first rotary switch 50 and a second rotary switch 60 described later will be described with reference to FIG. 3 which shows a cross section of the container 32 perpendicular to the axial direction.

In FIG. 3, reference numerals 51 and 61 denote drive shafts, which are parallel to each other and are both mounted through the container 32 at right angles to the axial direction of the container 32, and are rotationally driven by an operation mechanism (not shown) outside the container 32. Is done. 51a and 61a are insulators for electrically insulating the phases of the drive shafts 51 and 61. 5
Reference numerals 2 and 62 denote movable blades that are rotated integrally with the drive shafts 51 and 61. Reference numerals 53 and 63 support (slidably) the drive shafts 51 and 61 and are electrically (slidably) connected to the movable blades 52 and 62. The movable poles 54, 64 are first fixed contacts disposed at one end of a circumferential moving path (indicated by a dotted-line arc in the drawing) at the tip of the movable blades 52, 62 due to the rotation thereof. 5
Reference numerals 5 and 65 denote second fixed contacts disposed at the other end of the circumferential moving path. 43 is a first rotary switch 5
0 movable pole 53 and the first fixed contact 64 of the second rotary switch 60 are integrally formed. The common conductor 43 is supported and fixed by the cable head 41 via the conductor 42. Have been.

Returning to FIG. 1, reference numeral 44 denotes an insulating spacer which is a connection portion with a circuit breaker 35 which is an adjacent electric device housed in the container 31, and reference numeral 45 denotes a conductor having one end fixed to the insulating spacer 44. The movable pole 63 of the second rotary switch 60 is supported and fixed by the insulating spacer 44 via the conductor 45. The second fixed contact 55 of the first rotary switch 50 is supported and fixed by a first lid 46 that closes an opening formed at the right end of the container 32 (FIGS. 2 and 3). Further, a second fixed contact 65 of the second rotary switch 60 is supported and fixed by a second lid 47 that closes an opening formed at the left end of the container 32.

A lightning arrester 48 is a built-in electric device attached to the upper end, which is the other end in the axial direction of the container 32. The lower end of the lightning arrester is electrically connected to the first fixed contact 54 of the first rotary switch 50. It is connected to the. Reference numeral 49 denotes a voltage transformer, which is also a built-in electric device, and is electrically connected to the first fixed contact 54 of the first rotary switch 50 in parallel with the lightning arrester 48.

Next, the operation, particularly the operation of the first rotary switch 50 and the second rotary switch 60 having the functions of the disconnecting switch and the earthing switch will be described. First, with respect to the first rotary switch 50, when the movable blade 52 is at a position where it contacts the first fixed contact 54, the lightning arrester 48 and the voltage transformer 49 are connected to the first fixed contact 54-movable. Blade 52-movable pole 53-common conductor 43
When the movable blade 52 is rotated via the drive shaft 51 and the movable blade 52 is stopped at an intermediate position of the circumferential moving path, it is electrically connected to the cable head 41 through a path of the conductor 42 and the cable head 41. Then, the electric circuit between the lightning arrester 48 and the voltage transformer 49 and the cable head 41 is cut off, and both are electrically insulated. That is, the first
Is a lightning arrester 48 and a voltage transformer 49.
Functions as a disconnector for electrically connecting and disconnecting the cable head 41 from the cable head 41. Furthermore, when the rotation of the movable blade 52 is advanced to reach a position where the movable blade 52 comes into contact with the second fixed contact 55, the cable head 41, the conductor 42, the common conductor 43, the movable pole 53, the movable blade 52, and the second fixed contact 55 The cable head 41 is connected to the container 32 in the path of the lid 46 and is thus grounded. That is, the first rotary switch 50 also functions as a ground switch for electrically connecting and disconnecting the cable head 41 and the ground.

Next, with respect to the second rotary switch 60, when the movable blade 62 is located at the position where it contacts the first fixed contact 64, the insulating spacer 44, and thus the circuit breaker 35 in the adjacent container 31, Is the cable head 41 along the path of conductor 45-movable pole 63-movable blade 62-first fixed contact 64-common conductor 43-conductor 42-cable head 41.
When the movable blade 62 is rotated through the drive shaft 61 and the movable blade 62 stops at an intermediate position of the circumferential moving path, the electric path between the insulating spacer 44 and the cable head 41 is cut off. As a result, both are electrically insulated. That is, the second rotary switch 60 functions as a disconnector for electrically connecting and disconnecting the circuit breaker 35 and the cable head 41, which are adjacent electric devices. Further, when the movable blade 62 is further rotated to reach a position where the movable blade 62 comes into contact with the second fixed contact 65, the circuit breaker 35-the insulating spacer 44-the conductor 45-the movable pole 63-the movable blade 62-the second fixed contact 65 The circuit breaker 35 is connected to the container 32 in the path of the lid 47 and is thus grounded. That is, the second rotary switch 60 also functions as a ground switch for electrically connecting and disconnecting the circuit breaker 35 and the ground. Therefore, the above-described high voltage test, DC voltage test, and the like can be performed without any trouble.

As described above, each of the rotary switches 50 and 60 has a simple structure that can be operated by one drive shaft, and the both switches 50 and 60 are disposed at the lower end of the container 32. Is arranged in the middle between the cable head 41 and the surge arrester 48 and the voltage transformer 49 arranged at the upper end.
The connection with 49 can be easily made in a small space,
As a result, it is possible to reduce the inner volume of the container 32, and thus the outer shape. This also reduces costs.

The drive shafts 51 of both switches 50, 60
61 are arranged side by side in a diameter direction perpendicular to the axial direction of the container 32, and lids 46 and 47 serving as grounding portions are provided at both ends in the same diameter direction.
Are arranged, the connection and support structure of the two switches 50 and 60, particularly the second fixed contacts 55 and 65, become extremely simple. Furthermore, the movable pole 53 of the first rotary switch 50 is connected to the cable head 41 and the second rotary switch 60
Of the movable pole 63 is formed by an insulating spacer 44 which is a connecting portion.
Both switches are supported and fixed, so both switches 5
The structure for supporting the movable portions 0 and 60 is particularly simple.

Embodiment 2 FIG. 4 shows a main part of a gas insulated switchgear according to a second embodiment of the present invention. What is different from the first embodiment is the structure of the two-rotational switches 50 and 60, particularly the drive shafts 51 and 61. It is. That is, in FIG. 4, the first rotary switch 50 and the second rotary switch 60 have a structure in which the first rotary switch 50 and the second rotary switch 60 are pulled out of the container 32 from opposite sides in the axial direction, and the drive shafts respectively drawn out Shafts 51, 61
Are connected to the operation mechanisms 70 and 71. In FIG. 4, the operation mechanisms 70 and 71 are simply shown small, but actually include a motor, a transmission gear, a control device, and the like, and have considerable external dimensions. Therefore, as shown in FIG.
The operation mechanisms 70 and 71 for rotating and driving the drive shafts 51 and 61 of the switches 50 and 60 are mounted on the opposite sides of the container 32, thereby being affected by the mounting arrangement of the operation mechanisms 70 and 71. Without the need for both switches 50 and 60
Can be set to the minimum value, and the size of the container 32 that accommodates them can be reduced.

Embodiment 3 In each of the above examples,
Although the case where the cable head 41 is applied as the power introduction unit has been described, a bushing other than the cable head, for example, a bushing may be used. Although the three-phase lightning arrester 48 and the single-phase voltage transformer 49 are used as the built-in electric devices, the same effects can be obtained when any one of them is used as the built-in electric device. It is natural to play. Further, the adjacent electric device is not limited to the circuit breaker 35.

The common conductor 43 is connected to the cable head 41.
Instead, a separate support may be provided and supported and fixed by the container 32 via the support. Further, the movable pole 63 may be provided with a separate support instead of the insulating spacer 44, and may be supported and fixed by the container 32 via the support. Further, it is also possible to use only the first rotary switch 50 without using the second rotary switch 60, and to apply the invention to a gas insulated switchgear accommodating related devices.

Embodiment 4 In the following, as in the above-described embodiments, a rotary switch is adopted, but a gas-insulated switchgear that is assumed to be applied to a high-voltage system of a higher voltage, for example, 240 kV or more, will be described. FIG.
FIG. 13 is a single-line diagram of a gas-insulated switchgear according to Embodiment 4 of the present invention. It should be noted that parts corresponding to the respective parts in the above embodiment are indicated by numbers each of which is added with 100.

FIG. 6 is a sectional view of the gas insulated switchgear. Basically, as in the previous embodiment, three types of containers 130, 131, and 132 are provided, each containing an apparatus described below together with an insulating gas.
In the above, the lightning arrester and the disconnecting switch for connecting / disconnecting the voltage transformer and the circuit are not used because the device uses a high voltage.

The first container 130 includes disconnectors 133a, 1
33b and the busbars 134a and 134b are accommodated. The second container 131 accommodates a circuit breaker 135 and current transformers 181 and 182 before and after the circuit breaker 135 and a disconnector 183 (not shown in FIG. 6). The current transformer 18
2 is accommodated in the branch pipe 131a of the second container 131, thereby achieving a compact overall. Also, 13
6 is a breaker operating device box, and 137 is a control box.

Next, the internal device of the container (third container) 132 will be described. FIG. 7 shows the devices housed in the third container 132 and the connections between them, which will be sequentially described below in conjunction with FIG.

Reference numeral 184 denotes an insulating spacer connected to a bushing 185, which is a power introduction unit, which will be described later, and is provided through one end in the diameter direction of the third container 132. Fifteen
Reference numerals 0 and 160 denote a first rotary switch and a second rotary switch connected to the insulating spacer 184 via the conductor 186 and the common conductor 143. Among them, the first rotary switch 150 includes a drive shaft 151 (not shown), a movable blade 152, a movable pole 153, and a fixed contact 154, except that the number of fixed contacts is one. Since it is the same as the first rotary switch 50 described in detail with reference to FIGS. 2 and 3 above, detailed description thereof will be omitted here.

The second rotary switch 160 includes a drive shaft 16.
1 (not shown), movable blade 162, movable pole 163,
It comprises a first fixed contact 164 and a second fixed contact 165, which are the same as the second rotary switch 60 described in detail with reference to FIGS. Is omitted.

Reference numeral 149 denotes a voltage transformer, which is a built-in electric device disposed at the upper end, which is one end in the axial direction, of the third container 132, and is connected to the movable pole 153 of the first rotary switch 150. . The movable pole 153 is connected to a common conductor 1 supported and fixed by an insulating spacer 184 via a conductor 186.
43, and the fixed contact 154 is connected to the ground part 146. Reference numeral 148 denotes a lightning arrestor, which is a built-in electric device disposed at the lower end, which is the other end in the axial direction of the third container 132, and is connected to the first fixed contact 164 of the second rotary switch 160. Reference numeral 144 denotes an insulating spacer which is a connection portion with a circuit breaker 135 which is an adjacent electric device housed in the second container 131. Reference numeral 145 denotes a conductor having one end fixed to the insulating spacer 144, and is a second rotary opening / closing device. The movable pole 163 of the vessel 160 is connected to the insulating spacer 1 through the conductor 145.
It is supported and fixed by 44. Further, the second fixed contact 165 of the second rotary switch 160 is connected to the grounding part 147.

Further, in FIG. 6, reference numeral 187 denotes a fourth container for accommodating a conductor 188 for guiding the gas-side terminal of the bushing 185 to the insulating spacer 184, which is supported and fixed by a stand 189. The other containers 130, 131, 132, circuit breaker operating device box 136, and control box 137 share a common base 1
90 and is fixed. With this structure, integrated transportation is possible, and there is an advantage that transportation and installation work on site are simple and inexpensive.

Next, the operation, particularly the operation of the first rotary switch 150 and the second rotary switch 160 having the functions of the disconnecting switch and the earthing switch will be mainly described. First, with respect to the first rotary switch 150, when the movable blade 152 is at a position where it contacts the fixed contact 154, the lightning arrester 148, the voltage transformer 149, and the bushing 185 are movable pole 153-movable blade 152-fixed. It is in a state of being installed along the path of the contact 154 and the grounding part 146. When the movable blade 152 rotates and stops at the position indicated by N in FIG. 7 on the circumferential movement path, the installation state is released. That is, the first rotary switch 150 includes an arrester 148, a voltage transformer 149, and a bushing 185.
Switch 191 for electrically connecting and disconnecting the ground unit 146
Function as

Next, with respect to the second rotary switch 160, when the movable blade 162 is at a position where it contacts the first fixed contact 164, the circuit breaker 1 in the second container 131 is opened.
35 is an insulating spacer 144-conductor 145-movable pole 16
3-Movable blade 162-First fixed contact 164-Common conductor 143-Conductor 186-Insulating spacer 184-Bushing 185 is electrically connected to bushing 185, and then movable blade 162 is moved along its circumferential movement path. When stopped at the intermediate position, the breaker 135 and the bushing 18
5 is disconnected, and both are electrically insulated. That is, the second rotary switch 160 functions as a disconnector 192 that electrically connects and disconnects the breaker 135 and the bushing 185, which are adjacent electrical devices.

Further, the rotation of the movable blade 162 is advanced,
When the circuit breaker 135 reaches a position where it contacts the second fixed contact 165, the circuit breaker 135 operates as an insulating spacer 144-conductor 145-movable pole 1
63-the movable blade 162-the second fixed contact 165-the grounding part 147 is installed on the path. That is, the second
The rotary switch 160 also functions as a ground switch 193 for electrically connecting and disconnecting the circuit breaker 135 and the ground unit 147.

As described above, the rotary switches 150, 16
0 is a simple configuration that can be operated with one drive shaft,
Moreover, these switches 150 and 160 are connected to the third container 1.
32 and a voltage transformer 149 disposed at the upper end of the lightning arrester 148, and furthermore, an insulating spacer 184 which is a connection portion with the bushing 185 is provided between the lightning arrester 148 and the voltage transformer 149. From the third container 132
Are arranged so as to penetrate in the radial direction.
0, 160 and the related devices 148, 149, 184 can be easily connected in a small space, and as a result, the inner volume of the third container 132 and, therefore, the outer shape thereof can be reduced. This also reduces costs.

The movable pole 153 of the first rotary switch 150 is connected to the conductive pole 163 of the second rotary switch 160 by an insulating spacer 184 via a conductor 186.
45, each of which is supported and fixed by the insulating spacers 144 via the insulating spacers 144.
In particular, the structure for supporting the movable portion is extremely simple.

In the above description, the lightning arrester 148 is arranged at the lower end and the voltage transformer 149 is arranged at the upper end. However, the lightning arrester 148 may be arranged at the upper end and the voltage transformer 149 may be arranged at the lower end. It has the same effect. Further, the vertical position of the lightning arrester 148 and the voltage transformer 149 may be reversed depending on the three phases. In the above description, the bus system is the double bus system. However, the present invention can be similarly applied to a single bus system, a ring bus system, a 1.5CB system, and the like, and has the same effect.

Next, the concept of the gas insulated switchgear described with reference to FIGS. 5 to 7 is completely the same, and therefore, has the same effect as described above, but a modification of a part of the structure is different. Here are some examples.

FIG. 8 is a single-line diagram of a gas-insulated switchgear according to a first modification, and FIG. 9 is a cross-sectional configuration diagram. What differs from the devices in FIGS. 5 and 6 is the configuration of the power introduction unit.
That is, while the bushing 185 is employed in FIGS. 5 and 6, the cable head 141 is employed here. Therefore, here, the cable head 141 is accommodated in the fourth container 187 supported and fixed by the gantry 189, and is connected to the insulating spacer 184 via the conductor 188. In particular, the overall height of the gas insulated switchgear can be kept low.

Next, FIG. 10 is a single-line diagram of a gas insulated switchgear according to a second modification, and FIG. 11 is a configuration diagram shown in cross section. 5 and 6 is that the bus-side current transformer 181 of the circuit breaker 135 is eliminated. Thus, although there are some disadvantages in terms of the protection method, there is an advantage that the height of the second container 131 can be particularly reduced. In this case, the cable head 141 described with reference to FIGS. 8 and 9 may be used instead of the bushing 185.

Next, FIG. 12 is a single-line diagram of a gas insulated switchgear according to a third modification, and FIG. 13 is a configuration diagram shown in cross section. 10 and 11 is different from the circuit breaker 135 shown in FIG.
The current transformer 182 on the wire-entangled side is eliminated, and instead, the grounding switch 19 is installed at the base of the bushing 185 and in the fourth container 187.
4 is installed. Thus, although there are some disadvantages in terms of the protection method, there is an advantage that the outer dimensions of the second container 131 can be further reduced. Also in this case, the cable head 141 described with reference to FIGS. 8 and 9 may be used instead of the bushing 185.

Next, FIG. 14 is a single-line diagram of a gas insulated switchgear according to a fourth modification, and FIG. 15 is a configuration diagram shown in cross section. 8 and 9 is that the lightning arrester 148 as a built-in electric device is removed, thereby further reducing the outer shape of the device and reducing the cost. That is, FIG.
As shown in the figure, in the third container 132, a voltage transformer 149 is provided at its upper end, and a cable head 141 is provided at its lower end.
And a first rotary switch 150, a second
The rotary switch 160 is disposed, and the fourth container 187 itself is not required, thereby realizing a large downsizing of the apparatus. In the above, the voltage transformer 1 is used as the built-in electric device.
49, but instead of the lightning arrester 148,
May be arranged at the upper end of the container 132. Also in this case, it is possible to finish the device with almost the same compactness.

Next, FIG. 16 is a single-line diagram of a gas-insulated switchgear according to a fifth modification, and FIG. 17 is a cross-sectional configuration diagram. In this modification, the current transformers 181 and 182 before and after the circuit breaker 135 are removed by further miniaturizing the modification 4 described with reference to FIGS. 14 and 15, and the outside of the cable head 141 is replaced with these. Current transformer 1 to the cable 140
94 are provided.

Although there are some disadvantages in terms of the protection method in that the current transformer is saved, as can be seen from FIG. 17, among the above-mentioned modifications, the outer shape is the smallest and the cost is the smallest. Become. In this case as well, the voltage transformer 149 is left as a built-in electric device, but an arrester 148 may be arranged at the upper end of the third container 132 instead.

Embodiment 5 FIG. In the following, a rotary switch is employed as in the above-described embodiments, but is applied to a high-voltage system of a higher voltage, for example, 240 kV or more, and a so-called phase-separated type in which a container is provided for each phase. A gas insulated switchgear employing the above will be described. FIG. 18 is a single-line diagram of a gas-insulated switchgear according to Embodiment 5 of the present invention. In addition, about the part corresponding to each part of above-mentioned form 1-3, it shall display with the number which added 200 each.

FIG. 19 is a sectional view of the gas insulated switchgear. Basically, as in the first to third embodiments, three types of containers 230, 231, and 232 are provided, each containing an apparatus described below together with an insulating gas.

The first container 230 is composed of a total of six containers for each bus of the double bus and for each phase, and accommodates disconnectors 233a, b and buses 234a, b, respectively. I have. The second container 231 is composed of a total of three containers for each phase, each having a circuit breaker 235, current transformers 281 and 282 before and after the circuit breaker 235, and a disconnector 283 (see FIG. 19).
Are not shown in the drawing), and the current transformer 28
2 is housed in the branch pipe 231a of the second container 231 to achieve a compact size as a whole. Also, 23
6 is a circuit breaker operating device box, and 237 is a control box.

The third container 232 is composed of a total of three containers for each phase. Next, the internal devices of each of the third containers 232 will be described. FIG. 20 shows the devices housed in the third container 232 and the connections between them.
Hereinafter, description will be sequentially made in conjunction with FIG. Note that a disconnecting switch for connecting and disconnecting the lightning arrester, the voltage transformer, and the circuit is not used because the device uses a high voltage.

Reference numeral 284 denotes an insulating spacer connected to a cable head 241 serving as a power introduction unit, which will be described later, and is provided through one end in the diameter direction of the third container 232.
250 and 260 are conductor 286 and common conductor 243
Are a first rotary switch and a second rotary switch connected to the insulating spacer 284 through the second rotary switch. Of these, the first
The rotary switch 250 includes a drive shaft 251 (not shown), a movable blade 252, a movable pole 253, and a fixed contact 25.
4, except that only one fixed contact is used, and since it is the same as the first rotary switch 50 described in detail with reference to FIGS. Is omitted.

The second rotary switch 260 is connected to the drive shaft 26.
1 (not shown), movable blade 262, movable pole 263,
It is composed of a first fixed contact 264 and a second fixed contact 265, and the second fixed contact 264 described in detail in FIGS.
Since it is the same as the rotary switch 60, the detailed description thereof is omitted here.

Reference numeral 249 denotes a voltage transformer which is a built-in electric device disposed at the upper end which is one end in the axial direction of the third container 232, and is connected to the movable pole 253 of the first rotary switch 250. . The movable pole 253 is connected to a common conductor 2 supported and fixed by an insulating spacer 284 via a conductor 286.
The fixed contact 254 is connected to the grounding part 246. Reference numeral 248 denotes a lightning arrestor, which is a built-in electric device disposed at the lower end, which is the other end in the axial direction of the third container 232, and is connected to the first fixed contact 264 of the second rotary switch 260. Reference numeral 244 denotes an insulating spacer which is a connection portion with a circuit breaker 235 which is an adjacent electric device housed in the second container 231. Reference numeral 245 denotes a conductor having one end fixed to the insulating spacer 244. The movable pole 263 of the heater 260 is connected to the insulating spacer 2 via the conductor 245.
It is supported and fixed by 44. Further, the second fixed contact 265 of the second rotary switch 260 is connected to the grounding part 247.

Further, in FIG. 19, 287 is the cable head 2
The conductor 28 for guiding the gas-side terminal 41 to the insulating spacer 284
8 and is supported and fixed by a gantry 289. The other containers 230, 231, 232, circuit breaker operating device box 236, and control box 237 are mounted and fixed on a common base 290 for each phase. With this structure, integrated transportation is possible, and there is an advantage that transportation and installation work on site are simple and inexpensive.

Here, the configuration of the bus 234 shown in FIG.
In particular, the arrangement of each phase bus separated from each other will be described. Now, taking the bus 234a as an example, assuming that the positions of the respective phase buses viewed from the direction perpendicular to the paper are P1, P2, and P3 from the top as shown in FIG. The triangle formed by P2 and P3 is an isosceles triangle having the vertex at the point P2, and the angle of the vertex is an obtuse angle greater than 90 °. Thus, by arranging each phase bus so as to be located at each vertex of the obtuse isosceles triangle, it is possible to reduce the outer dimensions particularly in the left-right direction in FIG.

Next, the operation, particularly the operation of the first rotary switch 250 and the second rotary switch 260 having the functions of the disconnecting switch and the grounding switch will be mainly described. First, when the movable blade 252 of the first rotary switch 250 is in a position where it contacts the fixed contact 254, the lightning arrester 248, the voltage transformer 249, and the cable head 241 are connected to the movable pole 253 and the movable blade 252.
It is in a state of being grounded through the route of the fixed contact 254-the grounding part 246. Then, when the movable blade 252 rotates and stops at the position indicated by N in FIG. 20 on the circumferential movement path, the ground contact state is released. That is, the first rotary switch 25
Numeral 0 functions as a lightning arrester 248, a voltage transformer 249, and a grounding switch 291 for electrically connecting and disconnecting the cable head 241 and the grounding part 246.

Next, regarding the second rotary switch 260, when the movable blade 262 is in a position where it contacts the first fixed contact 264, the circuit breaker 2 in the second container 231
35 is an insulating spacer 244-conductor 245-movable pole 26
3- movable blade 262-first fixed contact 264-common conductor 243-conductor 286-insulating spacer 284-electrically connected to cable head 241 through the path of cable head 241, after which movable blade 262 moves in its circumferential direction. When stopping at the middle position of the road, the voltage between the circuit breaker 235 and the cable head 241 is cut off, and both are electrically insulated. That is, the second rotary switch 260 is connected to the circuit breaker 235, which is an adjacent electrical device, and the cable head 24.
It functions as a disconnector 292 that makes electrical contact with and separates from the switch 1.

Further, the rotation of the movable blade 262 is advanced,
When the circuit breaker 235 reaches a position where it contacts the second fixed contact 265, the circuit breaker 235
63-the movable blade 262-the second fixed contact 265-the grounding part 247 is in a state of being separated and contacted on the path. That is, the second
The rotary switch 260 functions also as a ground switch 293 for electrically connecting and disconnecting the circuit breaker 235 and the ground portion 247.

As described above, the rotary switches 250, 26
0 is a simple configuration that can be operated with one drive shaft,
Moreover, these switches 250 and 260 are connected to the third container 2
32 and a voltage transformer 249 disposed at the upper end of the lightning arrester 248, and an insulating spacer 284, which is a connection portion with the cable head 241, is provided between the lightning arrester 248 and the voltage transformer 249. Third container 2 from between
32 are arranged so as to penetrate in the radial direction.
50, 260 and their related devices 248, 249, 284
The connection between the third container 232 and the outer shape of the third container 232 can be reduced as a result. This also reduces costs.

The movable pole 253 of the first rotary switch 250 is connected to the conductive pole 263 of the second rotary switch 260 by the insulating spacer 284 via the conductor 286.
45, each of which is supported and fixed by the insulating spacer 244 via the switch 45.
In particular, the structure for supporting the movable portion is extremely simple.

In the above description, the lightning arrester 248 is arranged at the lower end and the voltage transformer 249 is arranged at the upper end. However, the lightning arrester 248 may be arranged at the upper end and the voltage transformer 249 may be arranged at the lower end. It has the same effect. Further, the vertical positions of the surge arrester 248 and the voltage transformer 249 may be reversed depending on the three phases. In the above description, the bus system is the double bus system. However, the present invention can be similarly applied to a single bus system, a ring bus system, a 1.5CB system, and the like, and has the same effect.

Next, the concept of the gas insulated switchgear described with reference to FIGS. 18 to 20 is completely the same, and therefore, has the same effect as described above, but a modification of a part of the structure is different. Here are some examples.

FIG. 21 is a single-line diagram of a gas-insulated switchgear according to a first modification, and FIG. 22 is a configuration diagram shown in cross section.
What differs from the devices of FIGS. 18 and 19 is the configuration of the power introduction unit. That is, while the cable head 241 is employed in FIGS. 18 and 19, the bushing 285 is employed here. Therefore, the conductor forming the bushing 285 is connected to the insulating spacer 284 here.

Next, FIG. 23 is a single-line diagram of a gas-insulated switchgear according to a second modification, and FIG. 24 is a cross-sectional configuration diagram. 18 and 19 is that the bus-side current transformer 281 of the circuit breaker 235 is eliminated. This allows
Although there are some disadvantages in terms of the protection method, there is an advantage that the height of the second container 231 can be particularly reduced. in this case,
Instead of the cable head 241, the bushing 285 described with reference to FIGS.

Next, FIG. 25 is a single-line diagram of a gas insulated switchgear according to a third modification, and FIG. 26 is a cross-sectional configuration diagram. 23 and 24 is different from the devices of FIGS.
The current transformer 281 on the track side is eliminated, and the current transformer 294 is attached to the cable 240 on the air side of the cable head 241 instead. Although this has some disadvantages in terms of the protection method, there is an advantage that the outer dimensions of 31231 can be further reduced. Also in this case, the cable head 2
Instead of 41, the bushing 285 described in FIGS. 21 and 22 may be adopted.

Next, FIG. 27 is a single-line diagram of a gas-insulated switchgear according to a fourth modification, and FIG. 28 is a cross-sectional configuration diagram. 18 and 19 is that the lightning arrester 248 as a built-in electric device is removed, thereby further reducing the outer shape of the device and reducing the cost. That is, as shown in FIG. 28, in the third container 232, a voltage transformer 249 is provided at the upper end thereof, and the cable head 2 is provided at the lower end thereof.
41, and a first rotary switch 250 between them,
The second rotary switch 260 is disposed, and the fourth container 287 is disposed.
The device itself is not required, and the device has been made significantly more compact. In the above description, the voltage transformer 249 is adopted as the built-in electric device. Alternatively, the lightning arrester 248 may be arranged at the upper end of the third container 232. Also in this case, it is possible to finish the device with almost the same compactness.

In each of the above embodiments, each container has a circular cross section, but may have an elliptical shape, an oval shape, or a polygonal shape depending on the shape and arrangement of the built-in equipment. Further, the present invention is not necessarily limited to the gas-insulated type, and can be widely applied to other insulating-type switchgears such as oil-insulated and has the same effect.

[0081]

As described above, the opening / closing device according to the first aspect of the present invention provides a drive shaft, a movable blade rotated by the drive shaft, and supports the drive shaft and is electrically connected to the movable blade. A movable switch comprising a movable pole and first and second fixed contacts separated from the movable pole by a predetermined distance and separated from the movable pole by a predetermined distance, A power introduction unit electrically connected to the movable pole, a built-in electrical device electrically connected to the first fixed contact, a grounding unit electrically connected to the second fixed contact, Is rotated to an intermediate position between the first fixed contact, the second fixed contact, and the two contacts, so that the rotary switch functions as a disconnector and a grounding switch. Compared to the case where the earthing switch is provided separately, It is possible to reduce the dimensions.

Further, in the opening / closing device according to the second aspect, a power introduction unit is disposed at one axial end of the cylindrical container, and a built-in electric device is disposed at the other axial end of the tubular container. Since the rotary switch is arranged between the unit and the built-in electric device so that its drive shaft is substantially perpendicular to the axial direction of the container, the connection between the rotary switch and the related parts can be easily performed. Done,
The size of the container can be further reduced.

According to a third aspect of the present invention, there is provided an opening / closing device comprising: a drive shaft; a movable blade rotated by the drive shaft; a movable pole supporting the drive shaft and electrically connected to the movable blade; Two rotating switches (first and second fixed contacts) which are arranged at a predetermined distance from the pole and at a predetermined distance from each other, and are provided with first and second fixed contacts which can be brought into contact with and separated from the movable blade. And a power introduction unit electrically connected to a movable pole of the first rotary switch and a first fixed contact of the second rotary switch. Is electrically connected to a first fixed contact of the first rotary switch, and a first ground portion is connected to a second fixed contact of the first rotary switch.
, And a connection portion is electrically connected to a movable pole of the second rotary switch, and a second ground portion is connected to a second electrode of the second rotary switch. By rotating the movable blade to an intermediate position between the first fixed contact, the second fixed contact, and both contacts.
And the second rotary switch functions as a second disconnector and a second grounding switch, and the second rotary switch functions as a first disconnector and a first grounding switch. Therefore, the size of the container can be significantly reduced as compared with the case where two sets of the disconnecting switch and the grounding switch are individually provided.

Further, in the opening and closing device according to a fourth aspect, a power introduction unit is disposed at one axial end of the cylindrical container, and a built-in electric device is disposed at the other axial end of the tubular container. Since the first and second rotary switches are arranged between the unit and the built-in electric device such that the drive shaft thereof is substantially perpendicular to the axial direction of the container, two rotary switches are provided. And the related parts can be easily connected, and the size of the container can be further reduced.

Further, in the switching device according to the fifth aspect, the first and second rotary switches are arranged side by side in the diametrical direction of the container, and the second fixed switch of the first rotary switch is provided. Since the contact is located at one end in the diametric direction and the second fixed contact of the second rotary switch is located at the other end in the diametric direction, the size of the container, particularly in the diametric direction, is reduced. Becomes possible.

The switching device according to claim 6 is characterized in that the movable pole of the first rotary switch and the first pole of the second rotary switch are connected to each other.
And the fixed contacts are integrally formed and supported and fixed by the power introduction unit, and the movable pole of the second rotary switch is supported and fixed by the connection unit. The support structure inside is simplified.

The opening and closing device according to claim 7 has an opening at one end side in the diameter direction of the container and a first opening and closing opening.
Are provided with an opening at the other end in the diametric direction and a second cover for closing the opening, and the second fixed contact of the first rotary switch is supported and fixed by the first cover. Since the second fixed contact of the second rotary switch is configured to be supported and fixed by the second lid, the connection and support structure of the second fixed contact of both rotary switches is particularly improved. It becomes simple.

Further, the opening and closing device according to claim 8 includes an operating mechanism for rotating and driving the drive shaft from outside of the container. Since the rotary switches are disposed at the other end of the drive shaft, the mounting interval between the rotary switches can be set to a minimum without being affected by the outer shape of the operating mechanism. Becomes possible,
The size of the container is reduced accordingly.

Further, in the switchgear according to the ninth aspect, the power introduction part is a cable head disposed through the container.
Since the built-in electric device is one or both of a lightning arrester and a voltage transformer, it is possible to realize a small switchgear having a built-in cable head and a lightning arrester.

Further, the switchgear according to claim 10 is the first switchgear.
, A first movable blade that is rotated by the first drive shaft, and a first movable pole that supports the first drive shaft and is electrically connected to the first movable blade A first rotary switch comprising a fixed contact which is separated from the first movable pole by a predetermined distance and which can be brought into contact with and separated from the first movable blade; and a second drive shaft; A second movable blade that is rotated by the drive shaft, and a second movable blade that supports the second drive shaft and is electrically connected to the second movable blade.
And a first and a second fixed contact which are arranged at a predetermined distance from the second movable pole and at a predetermined distance from each other and are capable of coming into contact with and separating from the second movable blade. And a power introduction unit and a built-in electric device are electrically connected to the first movable pole and the first fixed contact, and a first ground unit is electrically connected to the fixed contact. And the connection portion is electrically connected to the second movable pole,
Is electrically connected to the second fixed contact, and the first movable blade is turned to be in contact with or separated from the fixed contact so as to connect the first rotary switch to the first fixed contact. The second rotary switch is disconnected by functioning as a grounding switch and rotating the second movable blade to an intermediate position between the first fixed contact, the second fixed contact and the two contacts. Function as a switch and a second grounding switch, so that the size of the container can be greatly reduced as compared with the case where one disconnecting switch and two grounding switches are separately provided. Becomes

Further, in the switchgear according to the eleventh aspect, either one of a voltage transformer and a lightning arrester is disposed at one axial end of the cylindrical container, and the voltage transformer is disposed at the other axial end. Alternatively, one of the lightning arresters is arranged, and the first and second rotary switches are arranged between the voltage transformer and the lightning arrestor such that the drive shaft thereof is substantially perpendicular to the axial direction of the container. Since the power introduction unit was disposed radially through the container from between the voltage transformer and the surge arrester,
The connection between the rotary switches and related parts can be done without difficulty.
The size of the container can be further reduced.

Further, in the opening and closing device according to the twelfth aspect, the connecting portion is disposed at one end in the diameter direction of the container, and the power introducing portion is disposed at the other end side in the diameter direction. Connection of each part in the direction becomes easy.

Further, in the switchgear according to the thirteenth aspect, since the power introducing portion is a bushing for aerial connection disposed through the container, a small-sized switchgear provided with a bushing for aerial connection is provided. It can be realized.

Further, in the switchgear according to the fourteenth aspect, since the power introduction portion is a cable head provided to penetrate the container, it is possible to realize a compact switchgear provided with the cable head. Become.

Further, the switchgear according to the fifteenth aspect has the first
, A first movable blade that is rotated by the first drive shaft, and a first movable pole that supports the first drive shaft and is electrically connected to the first movable blade A first rotary switch comprising a fixed contact which is separated from the first movable pole by a predetermined distance and which can be brought into contact with and separated from the first movable blade; and a second drive shaft; A second movable blade that is rotated by the drive shaft, and a second movable blade that supports the second drive shaft and is electrically connected to the second movable blade.
And a first and a second fixed contact which are arranged at a predetermined distance from the second movable pole and at a predetermined distance from each other and are capable of coming into contact with and separating from the second movable blade. , And electrically connects a cable head and a built-in electric device to the first movable pole and the first fixed contact, and electrically connects a first ground portion to the fixed contact. Connecting, electrically connecting the connecting portion to the second movable pole,
Electrically connecting a second grounding portion to the second fixed contact;
By rotating the first movable blade and coming into contact with and separating from the fixed contact, the first rotary switch functions as a first grounding switch, and the second movable blade is connected to the first movable blade. By rotating to the intermediate position between the fixed contact, the second fixed contact and the two contacts, the second rotary switch is made to function as a disconnecting switch and a second grounding switch. It is possible to greatly reduce the size of the container as compared with the case where two disconnectors and two grounding switches are separately provided.

According to a sixteenth aspect of the present invention, there is provided the opening and closing device, wherein a built-in electric device is disposed at one end in the axial direction of the cylindrical container, and a cable head is disposed at the other end in the axial direction. The first and second rotary switches are arranged between the cable head and the drive shaft so as to be substantially perpendicular to the axial direction of the container. Can be easily connected, and the size of the container can be further reduced.

Further, the opening and closing device according to claim 17 is a first container accommodating the bus and the bus disconnector.
And a second container accommodating a circuit breaker disposed adjacent to the container and electrically connected to the bus disconnector, and disposed adjacent to the second container as the adjacent electric device. Since the container according to any one of claims 3 to 16 described above is provided, it is possible to realize a switchgear including a related device from the power introduction unit to the bus with a compact outer shape.

In the switchgear according to the eighteenth aspect, the bus bar and each container are provided for each phase to form a phase separation type.
It is possible to realize a highly reliable phase-separated switchgear with a compact outer shape, including related devices from the power introduction unit to the bus.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a gas-insulated switchgear according to Embodiment 1 of the present invention.

FIG. 2 is a connection diagram of devices in a container 32 of FIG.

FIG. 3 is a sectional view showing the rotary switches 50 and 60 of FIG. 1;

FIG. 4 is a diagram showing a main part of a gas insulated switchgear according to Embodiment 2 of the present invention.

FIG. 5 is a single-line diagram of a gas-insulated switchgear according to Embodiment 4 of the present invention.

6 is a configuration diagram showing a cross section of the gas insulated switchgear of FIG. 5;

FIG. 7 is a connection diagram of devices in a third container 132 of FIG. 6;

FIG. 8 is a single-line diagram of a gas-insulated switchgear according to a first modification of the fourth embodiment of the present invention.

FIG. 9 is a configuration diagram showing a cross section of the gas insulated switchgear of FIG. 8;

FIG. 10 is a single-line diagram of a gas-insulated switchgear according to a second modification of the fourth embodiment of the present invention.

11 is a configuration diagram showing a cross section of the gas insulated switchgear of FIG. 10;

FIG. 12 is a single-line diagram of a gas-insulated switchgear according to a third modification of the fourth embodiment of the present invention.

13 is a configuration diagram showing a cross section of the gas insulated switchgear of FIG. 12;

FIG. 14 is a single-line diagram of a gas-insulated switchgear according to a fourth modification of the fourth embodiment of the present invention.

FIG. 15 is a configuration diagram showing a cross section of the gas insulated switchgear of FIG. 14;

FIG. 16 is a single-line diagram of a gas-insulated switchgear according to a fifth modification of the fourth embodiment of the present invention.

FIG. 17 is a configuration diagram showing a cross section of the gas insulated switchgear of FIG. 16;

FIG. 18 is a single-line diagram of a gas-insulated switchgear according to Embodiment 5 of the present invention.

FIG. 19 is a configuration diagram showing a cross section of the gas insulated switchgear of FIG. 18;

FIG. 20 is a wiring diagram of devices in the third container 232 of FIG. 19;

FIG. 21 is a single-line diagram of a gas-insulated switchgear according to a first modification of the fifth embodiment of the present invention.

FIG. 22 is a configuration diagram showing a cross section of the gas insulated switchgear of FIG. 21.

FIG. 23 is a single-line diagram of a gas-insulated switchgear according to a second modification of the fifth embodiment of the present invention.

24 is a configuration diagram showing a cross section of the gas insulated switchgear of FIG. 23.

FIG. 25 is a single-line diagram of a gas-insulated switchgear according to a third modification of the fifth embodiment of the present invention.

26 is a configuration diagram showing a cross section of the gas insulated switchgear of FIG. 25.

FIG. 27 is a single-line diagram of a gas-insulated switchgear according to a fourth modification of the fifth embodiment of the present invention.

FIG. 28 is a configuration diagram showing a cross section of the gas insulated switchgear of FIG. 27;

FIG. 29 is a cross-sectional view of a conventional gas insulated switchgear.

FIG. 30 is a connection diagram of each component of FIG. 5;

[Explanation of symbols]

30, 130, 230 First container, 31, 131, 2
31 second container, 32, 132, 232 third container, 34, 134, 234 busbar, 35, 135, 23
5 circuit breaker, 41, 141, 241 cable head,
42, 142, 242 conductor, 43, 143, 243
Common conductor, 44, 144, 244 insulating spacer, 4
5,145,245 conductor, 46 first lid, 146
246 first ground, 47 second lid, 147, 24
7 Second grounding section, 48, 148, 248 arrester, 4
9,149,249 Voltage transformer, 50,150,25
0 First rotary switch, 60, 160, 260 Second
Rotary switches 51, 151, 251, 61, 16
1,261 drive shaft, 52,152,252,62,1
62,262 movable blade, 53,153,253,
63, 163, 263 movable pole, 54, 154, 16
4, 64, 164, 264 fixed contact, 70, 71 operating mechanism, 185, 285 bushing, 191, 291
First ground switch, 192, 292 disconnector, 19
3,293 Second grounding switch.

Continuing from the front page (72) Inventor Hiroki Sanuki 2-3-2 Marunouchi, Chiyoda-ku, Tokyo, Japan Mitsubishi Electric Corporation (72) Inventor Kenji Sasamori 2-3-2, Marunouchi, Chiyoda-ku, Tokyo Mitsubishi Electric Co., Ltd. Inside the company (72) Kenji Terada 2-3-2 Marunouchi, Chiyoda-ku, Tokyo, Japan Mitsubishi Electric Corporation (72) Inventor Hitoshi Sadakuni 2-3-2, Marunouchi, Chiyoda-ku, Tokyo Mitsubishi Electric Corporation (72) Inventor Tsuyoshi Mori 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsui Electric Co., Ltd. (72) Inventor Motoharu 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsui Electric Co., Ltd.

Claims (18)

[Claims] 1. An external power introduction unit, a built-in electric device,
A disconnector for electrically connecting and disconnecting the power introduction unit and the built-in electrical device, and a switching device including a grounding switch for electrically connecting and disconnecting the power introduction unit and a grounding unit in a container. A drive shaft, a movable blade rotated by the drive shaft, a movable pole supporting the drive shaft and electrically connected to the movable blade, and being separated from the movable pole by a predetermined distance and separated from each other by a predetermined distance. A rotating switch comprising first and second fixed contacts which are disposed and can be brought into contact with and separated from the movable blade, electrically connect the power introducing section to the movable pole, and An apparatus is electrically connected to the first fixed contact, the ground is electrically connected to the second fixed contact, and the movable blade is connected to the first fixed contact, the second fixed contact, and both. By rotating to the middle position of the contact, Doshiki switch-off device being characterized in that so as to function as the disconnector and grounding switch. 2. An electric power introduction unit is disposed at one axial end of the cylindrical container, and a built-in electric device is disposed at the other axial end of the cylindrical container. 2. The switchgear according to claim 1, wherein the rotary switch is arranged such that the drive shaft is substantially perpendicular to the axial direction of the container. 3. An external power introduction unit, a built-in electric device,
A connection portion to an adjacent electric device, a first disconnector for electrically connecting and disconnecting the power introducing portion to and from the built-in electric device, and a first disconnecting device for electrically connecting and disconnecting the power introducing portion to the first grounding portion. 1 ground switch, a second disconnector for electrically connecting and disconnecting the power introduction unit and the connection unit, and a second ground for electrically connecting and disconnecting the connection unit and the second ground unit. An opening / closing device having a switch housed in a container, a drive shaft, a movable blade rotated by the drive shaft, a movable pole supporting the drive shaft and electrically connected to the movable blade, Two rotatable switches (first and second) which are arranged at a predetermined distance from the movable pole and at a predetermined distance from each other and are composed of first and second fixed contacts which can be brought into and away from the movable blade. (2 rotary switches), and the power introduction unit is provided with a movable pole of the first rotary switch. And electrically connected to a first fixed contact of the second rotary switch, and electrically connected the built-in electrical device to a first fixed contact of the first rotary switch; The first ground portion is electrically connected to a second fixed contact of the first rotary switch, and the connection portion is electrically connected to a movable pole of the second rotary switch. Connecting the second grounding portion to a second fixed contact of the second rotary switch; and positioning the movable blade at an intermediate position between the first fixed contact, the second fixed contact, and both contacts. , The first rotary switch functions as the first disconnector and the first grounding switch, and the second rotary switch operates as the second disconnector. A switching device characterized by functioning as a second grounding switch. 4. An electric power introduction unit is disposed at one axial end of the cylindrical container, and a built-in electric device is disposed at the other axial end of the cylindrical container. 4. The switchgear according to claim 3, wherein the first and second rotary switches are arranged such that the drive shaft is substantially perpendicular to the axial direction of the container. 5. A container according to claim 1, wherein said first and second rotary switches are arranged side by side in the diameter direction of said container, and said second fixed contact of said first rotary switch is connected to one end of said diameter direction. The switchgear according to claim 4, wherein a second fixed contact of the second rotary switch is located at the other end in the diameter direction. 6. A movable pole of the first rotary switch and a first fixed contact of the second rotary switch are formed as an integral structure, supported and fixed by a power introducing section, and 6. The switchgear according to claim 5, wherein a movable pole of the rotary switch is supported and fixed by a connecting portion. 7. An opening and a first lid for closing the opening at one end in the diameter direction of the container, and an opening and a second lid for closing the opening at the other end in the diameter direction, respectively. A second fixed contact of the first rotary switch is supported and fixed by the first lid, and a second fixed contact of the second rotary switch is supported and fixed by the second lid. The switchgear according to claim 5 or 6, wherein the switchgear is operated. 8. An operating mechanism for rotating and driving a drive shaft from outside of the container, wherein the first rotary switch is provided at one end of the drive shaft, and the second rotary switch is provided at the one end of the drive shaft. The switchgear according to any one of claims 5 to 7, wherein the switchgear is disposed on the other end of the drive shaft. 9. The switching device according to claim 3, wherein the power introduction unit is a cable head disposed through the container, and the built-in electric device is one or both of a lightning arrester and a voltage transformer. apparatus. 10. An external power introduction unit, a built-in electric device including a voltage transformer and a lightning arrester, a connection unit to an adjacent electric device, and an electric connection between the power introduction unit and the built-in electric device and a first grounding unit. A first grounding switch for connecting and disconnecting, a disconnector for electrically connecting and disconnecting the power introduction unit and the connection unit, and a second disconnection unit for electrically connecting and disconnecting the connection unit and the second grounding unit A first drive shaft, a first movable blade rotated by the first drive shaft, and the first drive shaft. A first movable pole electrically connected to the first movable blade, and a fixed contact separated from the first movable pole by a predetermined distance and capable of coming into contact with and separating from the first movable blade. A rotary switch, a second drive shaft, and a second drive shaft rotated by the second drive shaft. A moving blade, a second movable pole that supports the second drive shaft and is electrically connected to the second movable blade, and is separated from the second movable pole by a predetermined distance and separated from each other by a predetermined distance. A second rotary switch comprising first and second fixed contacts which are disposed and which can be brought into contact with and separated from the second movable blade. Electrically connecting the movable pole and the first fixed contact, electrically connecting the first ground portion to the fixed contact, and electrically connecting the connection portion to the second movable pole; Electrically connecting the second grounding portion to the second fixed contact, rotating the first movable blade to come into contact with and separate from the fixed contact, thereby enabling the first rotary switch Function as the first grounding switch, and connect the second movable blade to the first fixed contact; A second switching switch that functions as the disconnecting switch and the second grounding switch by rotating to a middle position between the second fixed contact and the two contacts. . 11. A voltage transformer or a lightning arrester is disposed at one axial end of the cylindrical container, and the other of the voltage transformer or the lightning arrester is disposed at the other axial end. First and second rotary switches are arranged between the voltage transformer and the lightning arrestor such that the drive shaft thereof is substantially perpendicular to the axial direction of the container, and the power introduction unit is connected to the voltage transformer. The switchgear according to claim 10, wherein the container is radially penetrated from between the lightning arrester and the lightning arrester. 12. The switchgear according to claim 11, wherein a connection portion is arranged at one end of the container in the diameter direction, and a power introduction portion is arranged at the other end of the container in the diameter direction. 13. The switchgear according to claim 10, wherein the power introduction unit is an air connection bushing disposed through the container. 14. The switchgear according to claim 10, wherein the power introduction unit is a cable head disposed through the container. 15. An external cable head, a built-in electric device including a voltage transformer or a lightning arrester, a connection portion to an adjacent electric device, and electrically connecting and disconnecting the cable head and the built-in electric device to the first grounding portion. A first ground switch that performs electrical connection and disconnection between the power introduction unit and the connection unit, and a second ground switch that performs electrical connection and disconnection between the connection unit and the second ground unit A first drive shaft, a first movable blade rotated by the first drive shaft, and a first drive shaft supporting the first drive shaft. A first movable pole electrically connected to the first movable blade, and a fixed contact which is separated from the first movable pole by a predetermined distance and is capable of coming into contact with and separating from the first movable blade. A switch, a second drive shaft, and the second drive shaft A second movable blade, a second movable pole supporting the second drive shaft and electrically connected to the second movable blade, and a second movable pole separated from the second movable pole by a predetermined distance and mutually A second rotatable switch comprising first and second fixed contacts which are arranged at a predetermined distance from each other and which can be brought into contact with and separated from the second movable blade; The first movable pole is electrically connected to the first fixed contact, the first ground is electrically connected to the fixed contact, and the connection is electrically connected to the second movable pole. , And the second ground portion is electrically connected to the second fixed contact, and
The first movable switch functions as the first grounding switch by rotating the movable blade of the second movable blade to contact and separate from the fixed contact, and the second movable blade is moved to the first fixed contact. By rotating to the intermediate position between the contact, the second fixed contact, and both contacts, the second rotary switch functions as the disconnector and the second grounding switch. Switchgear. 16. A built-in electric device is disposed at one axial end of a cylindrical container, a cable head is disposed at the other axial end, and a drive shaft is provided between the built-in electric device and the cable head. 16. The switchgear according to claim 15, wherein the first and second rotary switches are disposed so as to be substantially perpendicular to the axial direction of the container. 17. A first housing accommodating a bus and a bus disconnector.
Container, a second container accommodating a circuit breaker disposed adjacent to the first container and electrically connected to the bus disconnector, and the second container using the circuit breaker as an adjacent electric device An opening and closing device comprising the container according to any one of claims 3 to 16 disposed adjacent to the container. 18. The switchgear according to claim 17, wherein the bus bar and each container are provided for each phase to form a phase separation type.