JPH11164426A - Gas insulation switching device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain a small type gas insulation switching device, by putting a first and a second operation devices for switching operation of a disconnect switch connected to a first and a second bus-bars between the first and the second main bus-bar units at a point symmetric position side by side so as to be eccentric from a central line. SOLUTION: An operating shaft 33 for operating a bus-bar side disconnect switch connected to a first main bus-bar 21 is connected with operation devices 31, 32 provided at an outside through a sliding gastight part formed under a first main bus-bar unit 11. The operating shaft 33 for operating a busbar side disconnect switch connected to a second main bus-bar 22 is also connected with the operation devices 31, 32 through the sliding gastight part formed above a second main bus-bar unit 12. The operation devices 31, 32 are stored in a closed container, and are disposed adjacent to each other between the first main bus-bar unit 11 and the second main bus-bar unit 12 by taking a conductive part of straight line as a central axis 100, so as to be eccentric to the central axis 100, and at a point-symmetric position to a point 101.

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, and more particularly, to a gas insulated switchgear having two main bus conductors.

[0002]

2. Description of the Related Art A gas-insulated switchgear is a device in which a switchgear and a current-carrying conductor are housed in a sealed container and filled with an insulating gas, and is excellent in downsizing, insulation performance and safety. Widely installed in substations and other substations. As such a gas insulated switchgear, there is a double main bus structure in which a plurality of branch lines are connected to a first main bus and a second main bus via devices such as a circuit breaker.

A first main bus unit and a second main bus unit of a conventional gas insulated switchgear are configured as described in JP-A-1-8906 and JP-A-62-272809. The main bus unit is connected to an airtight container for housing the bus disconnector, and an operating device for opening and closing the bus disconnector is provided outside the main bus unit in the horizontal direction. In such a configuration, the bus-side disconnector and the operating device have a first operation axis that operates the bus-side disconnector, a second operation axis that the operating device operates, a first operation axis, and a second operation shaft. It is connected via a connecting link connecting the shafts, and is supported by a gantry supported by a closed container. Further, a branch line unit for housing a circuit breaker or the like in a direction opposite to the operation device is provided.

As described above, in the prior art, the operating device for opening and closing the bus-side disconnector is provided outside the main bus unit, and a deviation due to a manufacturing tolerance and an assembly tolerance between the sealed container and the operating device. The operating device is generally large and heavy, because of providing a connecting link for absorbing power, or adopting an operating device that can be used for a general purpose from a relatively low voltage to a high voltage of the main bus voltage. Therefore, it is necessary to provide a gantry for supporting the operation device, and the operation device is installed at the center position in the longitudinal direction of the main bus unit and in the direction opposite to the branch line unit with the bus as an axis.

[0005]

As described above, in the conventional gas insulated switchgear, since the operating device is installed so as to protrude outward, it has been an obstacle to downsizing the entire gas insulated switchgear. Therefore, in order to reduce the size of the gas insulated switchgear, attention is paid to the space between the first main bus unit and the second main bus unit, and the first main bus unit and the second main bus unit.
Without changing the position of the main bus unit, an operating device for operating the bus-side disconnector housed in the main bus unit may be arranged between the main bus units. When disposed between the first main bus unit and the second main bus unit, there is a problem that the interval between the main bus units must be increased.

A first object of the present invention is to provide a gas insulated switchgear which can reduce the size of the gas insulated switchgear by disposing an operation device between the first and second main bus units. It is in.

A second object is to provide a first main bus unit and a second main bus unit.
It is an object of the present invention to provide a gas insulated switchgear capable of reducing costs by sharing the same shape with a main bus unit.

[0008]

In order to achieve the above object, a gas insulated switchgear of the present invention comprises a first main bus conductor and a first bus side disconnector connected to the first main bus conductor. A first main bus unit housed in a container, and a second main bus conductor and a second bus-side disconnector connected to the second main bus conductor, which are provided in parallel with the first main bus unit, are housed in the container. Second
A main bus unit and a double bus gas insulated switchgear in which a plurality of branch lines are connected to the first and second main bus units via a device including a circuit breaker, wherein the first and second buses are connected to each other. First and second operating devices for opening and closing the connected disconnector are provided between the first and second main bus units, respectively, and the first and second operating devices are eccentric from a center line to be point symmetric. Are arranged side by side.

In addition, one of the main bus units and a sealed container for storing the operation device connected to the main bus unit are connected to one another.
A sealed container that accommodates the other main bus unit and an operating device connected to the main bus unit is arranged at a position where the main bus unit is rotated and parallelly moved and overlapped by 80 degrees.

[0010] A first main bus conductor and a first bus-side disconnector connected to the first main bus conductor are housed in a container.
A second main bus unit accommodating a main bus unit, a second main bus conductor, and a second bus side disconnector connected to the second main bus conductor in a container is juxtaposed, and the first and second main bus units are arranged in parallel. A double bus gas insulated switchgear in which a plurality of branch line units are connected to a bus unit via a device including a circuit breaker, and controls opening and closing of the first bus disconnector and the second bus disconnector. An airtight container accommodating the operating device is disposed adjacent to the first and second main bus units in the axial direction, and the operating shaft of the operating device provided on the anti-branch line unit side is connected via a mechanical link mechanism. And connected to the bus-side disconnector.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG.
This will be described with reference to FIG. FIG. 1 is a front view of the gas-insulated switchgear of the present embodiment, FIG. 2 is a side view of the gas-insulated switchgear of the present embodiment, FIG. 3 is a front view of the gas-insulated switchgear of FIG. FIG. 4 is a single connection diagram of the gas insulated switchgear of the present embodiment.

In the gas insulated switchgear of this embodiment, as shown in FIG. 4, the first main bus 21 and the second main bus 22 respectively insulate the first main bus unit 11 and the second main bus unit 12 respectively. The connection is made via a spacer 54. In this gas insulated switchgear, branch line units 14 in which devices such as a circuit breaker 61, a line-side disconnector 43, and a lightning arrester 81 are housed in a container filled with gas are arranged side by side at predetermined intervals. These branch line units 14 include a first main bus unit 11 constituting the first main bus 21.
And the second main bus unit 12 constituting the second main bus 22 are connected via insulating spacers 51 and 52, respectively. The first main bus unit 11 and the second main bus unit 12 are connected to each of the first main bus 21 and the second main bus 22 for each branch line.
The first main bus units 11 are connected in series to form a first main bus 21, and the second main bus units 12 are connected in series to form a second main bus 22.

As shown in FIGS. 1 to 3, the first main bus 2
1 is disposed above the side of the branch line unit 14,
The second main bus 22 is arranged below the first main bus 21. First main bus 21 and second main bus 22 for three phases
Are arranged in a straight line in the vertical direction in a container of the first main bus unit 11 and a container of the second main bus unit 12 filled with gas, and are collectively stored. The main bus units 11 and 12 each have an opening on both sides in the main bus direction, and an opening is provided on one side in a direction orthogonal to the main bus unit. Insulating spacers 51, 52, 53 and 54 are attached to these openings, respectively. Containers of main bus units 11 and 12 and branch line unit 14
The first main bus 21 and the second main bus 22 are connected to the container via insulating spacers 51 and 52 in an airtight manner, and the insulating spacer 5 is connected via bus-side disconnectors 41 and 42, respectively.
1 and 52 are connected to the conductor 23 provided through the inside. Here, as shown in FIG. 3, the conductor portions 23 are arranged in a straight line in the horizontal direction so as to be point-symmetric about the center of the insulating spacer. The conductor on the first main bus 21 side and the conductor on the second main bus 22 provided in the branch line unit 14 connected to the conductor 23 are cut off via the conductor 24 provided in the vertical direction. Connected to the vessel 61.

As shown in FIG. 4, grounding switches 71 and 72 are provided on both sides of the circuit breaker 61. Circuit breaker 61
Is connected to the cable head 82 via the line-side disconnector 43,
Further, it is connected to a branch line 91. Further, a grounding switch 73, between the line-side disconnector 43 and the cable head 82,
The instrument transformer 83 and the lightning arrester 81 are connected respectively.

On the other hand, the first main bus unit 11 and the second main bus unit 12 are provided with insulating spacers 53 and 54, respectively.
Are connected to the first main bus unit 11 and the second main bus unit 12 of the adjacent line in an airtight manner, and the first main bus unit 11 and the second main bus unit 12 of the adjacent line are similarly connected. Bus-side disconnectors 41 and 42 connected to the first main bus 21 and the second main bus 22 for each branch line are accommodated for each of three phases.

The bus-side disconnectors 41 and 42 are operated collectively by an operation shaft 33. An operation shaft 33 for operating the bus-side disconnector 41 connected to the first main bus 21 is connected to the second main bus 22 via a sliding airtight portion provided below the first main bus unit 11. Bus-side disconnector 42
Is connected to operating devices 31 and 32 provided outside through sliding airtight portions provided above the second main bus unit 12, respectively. The operating devices 31 and 32 are housed in a closed container, and the straight conductor portion 23 is defined as a central axis 100 between the first main bus unit 11 and the second main bus unit 12 with respect to the central axis 100. And is disposed adjacent to a point symmetrical position with respect to the point 101.

As shown in FIG. 2, the operation shaft 33 is connected to the first main bus unit 11 and the first main bus unit 12 in the second main bus unit 12.
The three-phase bus-side disconnector 41, which is provided on the side opposite to the branch line unit 14 with respect to the main bus 21 and the second main bus 22,
42 is connected via a mechanical link mechanism, and the busbar side disconnectors 41 and 42 are opened and closed via the link mechanism by, for example, rotational movement of the operation shaft 33.

According to this embodiment, the first main bus unit and the second main bus unit can be formed in the same shape.
The first main bus unit and the second main bus unit can be shared. Further, since such a compact arrangement is possible, it is advantageous for reducing the manufacturing cost and the size of the gas insulated switchgear. Further, when one main bus unit is rotated 180 degrees and moved in parallel, it can be used as the other main bus unit, so that the main bus unit can be shared.

The present invention relates to the first main bus unit and the second main bus unit in the first main bus unit and the second main bus unit.
The arrangement of the main buses 22 is not limited to the straight line arrangement shown in the above embodiment, but may be appropriately selected from an isosceles triangle arrangement as shown in FIG. 5 and an equilateral triangle arrangement as shown in FIG. Also in this case, the operating devices 31 and 32 are, like the embodiment shown in FIGS. 1 to 4, provided with a linear conductor between the first main bus unit 11 and the second main bus unit 12. With the portion 23 as the central axis 100, it is eccentric with respect to the central axis 100, and is disposed adjacent to a point 101 symmetrically with respect to the point 101.

[0020]

As described above, according to the present invention,
The gas insulated switchgear can be downsized by disposing an operating device for operating the bus-side disconnector between the first main bus unit and the second main bus unit at a point symmetric position eccentric from the center line. Can be. Also, one main bus unit is set to 1
Since the main bus unit can be used as the other main bus unit when rotated and translated by 80 degrees, the main bus unit can be shared, and a low-cost and compact gas insulated switchgear can be provided.

[Brief description of the drawings]

FIG. 1 is a front view of a gas-insulated switchgear according to an embodiment of the present invention.

FIG. 2 is a side view of the gas insulated switchgear of the present embodiment.

FIG. 3 is a front view as viewed from an arrow AA in FIG. 2;

FIG. 4 is a single-line diagram showing a circuit configuration of a switchyard according to the present embodiment.

FIG. 5 is a side view of a gas insulated switchgear in which main bus conductors are arranged in an isosceles triangle in another embodiment of the present invention.

FIG. 6 is a side view of a gas insulated switchgear having another embodiment of the present invention in which main bus conductors are arranged in an equilateral triangle.

[Explanation of symbols]

11: first main bus unit, 12: second main bus unit, 13: sealed container, 14: branch line unit, 21 ...
1st main bus, 22 ... 2nd main bus, 23 ... conductor part, 24 ...
Conductors, 31, 32: operating device, 33, 34: operating shaft, 35
... Connecting link, 36 ... Base, 41, 42 ... Bus side disconnector, 43 ... Track side disconnector, 51,52,53,54,5
5: insulating spacer, 61: circuit breaker, 71, 72, 73 ...
Earthing switch, 81: lightning arrester, 82: cable head, 8
3 ... instrument transformer, 91 ... branch line, 100 ... center axis,
101: Center point.

Continued on the front page (72) Inventor Kenichi Okubo 1-1-1, Kokubuncho, Hitachi City, Ibaraki Prefecture Inside the Kokubu Plant, Hitachi, Ltd. (72) Inventor Junzo Kida 1-1-1, Kokubuncho, Hitachi City, Ibaraki Prefecture Inside the Kokubu Plant of Hitachi, Ltd.

Claims (3)

[Claims] A first main bus unit accommodating a first main bus conductor and a first bus disconnector connected to the first main bus conductor in a container; and a first main bus unit provided in parallel with the first main bus unit. , Second
A second main bus unit accommodating a main bus conductor and a second bus-side disconnector connected to the second main bus conductor in a container; and an apparatus including a circuit breaker in the first and second main bus units. A double-bus gas-insulated switchgear connected to a plurality of branch lines via the first and second buses, the first and second operating devices for opening and closing disconnectors connected to the first and second buses, respectively. 1. A gas insulated switchgear provided between first and second main bus units, wherein the first and second operating devices are arranged eccentrically from the center line and juxtaposed at point-symmetric positions. 2. A sealed container accommodating one main bus unit and an operation device connected to the main bus unit,
2. The gas insulated switchgear according to claim 1, wherein a sealed container housing the other main bus unit and an operation device connected to the main bus unit is arranged at a position where the main bus unit is rotated and parallelly moved and overlapped. 3. A first main bus unit containing a first main bus conductor and a first bus disconnector connected to the first main bus conductor in a container, a second main bus conductor and the second main bus conductor. A second main bus unit accommodating a second bus disconnector connected to the main bus conductor in a container is juxtaposed, and the first and second main bus units are connected to each other via a device including a circuit breaker. A double bus gas insulated switchgear connected to a line unit, wherein the hermetically sealed container accommodating an operating device for opening and closing the first bus-side disconnector and the second bus-side disconnector is provided in the first and second busbars. It is arranged adjacent to the main bus unit in the axial direction, and an operating shaft of an operating device provided on the anti-branch line unit side is connected to the bus-side disconnector via a mechanical link mechanism. Gas insulated switchgear.