JP2002078125A - Gas insulated switching apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To minimize the size of each equipment as much as possible, and also arrange the equipment so as to shorten the dimension in a circuit direction. SOLUTION: Bus-integrated disconnectors 10a and 10b, in which main buses A and B are integrated respectively, are placed on opposite sides at the same height. Between the bus-integrated disconnectors 10a and 10b, a T-shaped gas- insulated bus 15, which has a built-in current transformer for bus-sided instruments, is connected. A breaker 1a, which has a built-in current transformer for line-sided instruments, is connected to the bottom of the gas-insulated bus 15 and placed horizontally in a direction perpendicular to the main busses A and B. Next to the breaker 1a, an upward L-shaped disconnector-earthing unit 16 is placed vertically. In addition, an L-shaped gas-insulated bus 17 is placed on the disconnector-earthing unit 16 so as to face to the other side of the main buses A and B.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an arrangement of a gas insulated switchgear, and more particularly, to a gas insulated switchgear which is reduced in size, economical, and operable.

[0002]

2. Description of the Related Art In recent years, gas-insulated switchgears are often used as switchgears for the purpose of reducing the installation area, improving safety, maintainability, and checking performance, and for harmonizing the environment. The gas insulated switchgear, since the high SF ₆ gas insulation strength between the insulating medium, breaker, disconnector is capable to significantly reduction of equipment such as grounding switches, the one three conductors Many three-phase batch types housed in tanks are used.

[0003] Further, since the charging section of the gas insulated switchgear is all housed in a grounded metal container, various arrangements have been proposed depending on the combination of devices.
It has been significantly reduced.

FIG. 4 shows a general single-line connection diagram of such a gas insulated switchgear, and FIG. 5 is a side view showing a conventional arrangement.
Are shown below. As shown in FIG. 4, instrument current transformers 2a and 2b are arranged on both sides of the circuit breaker 1a, respectively, and the instrument current transformer 2a is connected via disconnectors 3a and 3b and a work grounding device 4a. While the current transformer 2b for the instrument is connected to the bushing 5a via the working grounding device 4b, the disconnecting switch 3c, and the line-side grounding switch 4c. An instrument transformer 6 and a lightning arrester 7 are connected between the line-side grounding switch 4c and the bushing 5a.

As shown in FIG. 5, disconnectors 3a, 3
b and the work grounding device 4a are integrated with the bus-integrated disconnector 1 integrated with the main buses A and B in order to simplify the internal structure.
0a, 10b, and these bus-bar-integrated disconnectors 10a, 10b are arranged as low as possible to simplify the supporting structure. The bus-integrated disconnector 10 is provided between the bus-integrated disconnectors 10a and 10b.
A detachable device 11a made of bellows is provided for assembling and disassembling the devices 10a and 10b. Further, the circuit breaker 1a
Is equipped with built-in instrument transformers 2a and 2b and is installed vertically to reduce the size of the line direction.

On the other hand, the line-side working grounding device 4b, disconnecting switch 3c and line-side grounding switch 4c are integrated (composite).
Then, the disconnector grounding device 12 is linearly mounted on the circuit breaker 1a via a detachable device 11b made of bellows in order to secure an inspection space for the circuit breaker mechanism 1b. (About 3 m). Further, the circuit breaker 1a, the disconnectors 3a and 3b, the disconnector 3c on the track side and the bushing 5a are arranged in a straight line, and a heavy machine such as a crane can be used from above when assembling and disassembling. It is configured as follows.

Further, operating devices 13a, 13b and 14a are provided corresponding to the disconnecting switches 3a and 3b and the work grounding device 4a, respectively.
b and 14a cannot be installed below because the main buses A and B are arranged in the lower part.
Degree).

Further, the disconnecting switch 3c, the work grounding device 4b,
The track-side grounding switch 4c is also operated by the operating devices 13c, 14b, 14
c are provided in correspondence with each other.
Also, c, 14b, and 14c cannot be installed below in order to secure a check space for the circuit breaker 1a at the bottom, and are mounted at the top. Therefore, in the conventional gas insulated switchgear, an operation platform for operating the operation device of each device is usually installed.

[0009]

The conventional gas insulated switchgear is arranged as described above to reduce the size in the line direction and to ensure various workability such as assembly, disassembly and inspection. Although it is configured, it is necessary to assemble and
The work space for disassembly and inspection was the same, which hindered downsizing of the entire switchgear.

[0010] The present invention has been made in view of the above circumstances, and in addition to minimizing the size of each device and arranging it so as to reduce the size in the line direction, to improve the workability of assembling, disassembling and operating. It is an object of the present invention to provide a gas insulated switchgear capable of being operated.

[0011]

In order to solve the above-mentioned problems, according to the first aspect of the present invention, the bus-integrated disconnectors in which the main buses are respectively integrated are arranged at the same height so as to face each other. A T-shaped gas-insulated bus containing a bus-side instrument current transformer is connected between these bus-bar-integrated disconnectors. The built-in circuit breaker is disposed horizontally in a direction perpendicular to the main bus, pulled out vertically upward from the circuit breaker with an L-shaped disconnector grounding device, and is separated from the disconnector grounding device by an L-shaped gas-insulated bus. It is characterized by being pulled out to the opposite side of the main bus.

According to the first aspect of the present invention, the disconnector and the circuit breaker integrated with the bus are arranged vertically, and the L-shaped disconnector grounding device connected to the circuit breaker is vertically upward at a minimum from the circuit breaker. By being configured to be drawn out, it is possible to reduce the size of each device to the required minimum size and to reduce the size in the line direction.

According to a second aspect of the present invention, in the gas insulated switchgear of the first aspect, the L-shaped gas insulated bus is
The drawer direction is configured to be changeable.

According to the second aspect of the present invention, the drawing direction of the L-shaped gas-insulated bus can be changed.
The bus length to the position of the external connection can be minimized, and the entire switchgear including a plurality of lines can be arranged compactly.

According to a third aspect of the present invention, in the gas insulated switchgear of the first aspect, the L-shaped gas insulated bus is
The drawer height can be changed.

According to the third aspect of the present invention, since the L-shaped gas-insulated bus bar is configured to be able to change the draw-out height, even if the line line crosses another line line, the line line is externally connected. And the entire switchgear including a plurality of lines can be arranged compactly.

[0017]

Embodiments of the present invention will be described below with reference to the drawings.

[First Embodiment] FIG. 1 is a side view showing a first embodiment of a gas insulated switchgear according to the present invention. Parts that are the same as or correspond to those in the related art will be described using the same reference numerals as in FIGS. The single-line diagram of FIG. 1 is the same as that of FIG.

In this embodiment, as shown in FIG. 1, the main buses A and B are respectively integrated and
a, 3b built-in bus bar integrated disconnector 10a, 10b
Are arranged at the same height so as to face each other, and are connected to the outlets on both sides of a T-shaped gas-insulated bus 15 incorporating the bus-side instrument current transformer 2a.

The circuit breaker 1a is a current transformer 2b for an instrument on the line side.
And is disposed horizontally below the main buses A and B in a direction perpendicular to the axial direction of the main buses A and B, and one outlet of the circuit breaker 1a is provided below a T-shaped gas-insulated bus 15. It is connected vertically to the outlet. In addition, the circuit breaker 1a
The other outlet is connected to one outlet of an L-shaped disconnector grounding device 16 via a detachable device 11b via a shortest path.

This L-shaped disconnector grounding device 16 compactly houses a working grounding device 4b, a line-side disconnector 3c, and a line-side grounding switch 4c, and the other outlet stands vertically upward. It is connected to a connection bus 17 which is raised and formed in an L shape. The connection bus 17 is pulled out in the horizontal direction to the opposite side to the main bus A, B side,
It is externally connected by a bushing 5a via an instrument transformer 6 and a lightning arrester 7.

The operating devices 13a, 13b, 13c and the operating devices 14a, 14b, 14c are all arranged at a low position (1.5 to 2 m from the ground) in front of the operator, and can be operated by workers from the ground. It has a simple arrangement.

As described above, according to the present embodiment, the integrated bus disconnector 10 in which the main buses A and B are integrated respectively.
a, 10b are arranged opposite to each other at the same height, and a T-shaped gas-insulated bus 15 incorporating a bus-side instrument current transformer 2a is connected between these bus-bar integrated disconnectors 10a, 10b; An L-shaped circuit breaker 1a connected to the lower part of the gas-insulated bus 15 and incorporating a current transformer 2b for the line side is disposed horizontally in a direction perpendicular to the main buses A and B. By forming the disconnector grounding device 16 in an L-shape and drawing it vertically upward instead of in the direction of external drawing, the dimension in the line direction can be reduced, and the main bus A,
The distance from B to the external drawer can be minimized.

That is, according to the present embodiment, the busbar-integrated disconnectors 10a and 10b and the circuit breaker 1a are arranged vertically,
The L-shaped disconnector grounding device 16, which is connected to the circuit breaker 1a and incorporates the line-side disconnector 3c, is configured to be pulled out vertically upward from the circuit breaker 1a in the shortest time. Can be planned.

[Second Embodiment] FIG. 2 is a plan view showing a second embodiment of the gas insulated switchgear according to the present invention, and FIG.
FIG. 3 is an end view taken along line AA of FIG. The same parts as those in the first embodiment will be described with the same reference numerals.

In this embodiment, as shown in FIG. 2, four line circuits are installed, and an L-shaped gas insulation connected to the disconnector grounding device 16 on the line side is provided at the line line X located at the end. The connection bus 17 which is a bus is a bushing 5 connected to another line via a connection bus 19a.
In order to avoid the construction safety separation distance L of b and connect to the bushing installed at a distance (not shown) at the shortest distance, the direction is changed to an arbitrary angle (45 ° in the present embodiment) and the connection bus 19b is connected. And is externally connected to the bushing located far away.

Further, in this embodiment, the connection bus 17a as an L-shaped gas insulation bus connected to the disconnector grounding device 16 on the line side of the line line Y is connected to the adjacent bushing 5
The connection bus 19d is raised to a height at which it can pass just above the connection bus 19c of the line connected to the connection bus c, and turned 90 degrees so as to be parallel to the main buses A and B, so that the connection bus 19d straddles the connection bus 19c. It is connected to the bushing 5d.

As described above, according to the present embodiment, since the drawing direction of the connection bus 17 can be changed, the bus length to the position of the external connection can be minimized, and the opening and closing including a plurality of lines can be performed. The whole device can be arranged compactly.

According to the present embodiment, the connection bus 17
a is configured so that the drawer height and the drawer direction can be changed, so that even when straddling another line, the line can be bypassed and externally connected, and the opening and closing including a plurality of lines can be performed in the same manner as described above. The whole device can be arranged compactly.

Therefore, in this embodiment, the line line X
, The connection bus 17 is changed in the direction to an arbitrary angle to avoid the construction safety separation distance L of the bushing 5b, and is externally connected, while being connected to the disconnector grounding device 16 on the line side of the line line Y. The bus bar 17a is raised to a height that can pass right above the connection bus bar 19c of the line connected to the adjacent bushing 5c, and is turned 90 degrees so as to be parallel to the main bus bars A and B, and the connection bus bar 19d and the bushing 5d.

As described above, according to the present embodiment, a line is formed by arbitrarily changing the angle and the extraction height by the L-shaped connection buses 17 and 17a disposed above the disconnector grounding device 16 on the line side. By doing so, the main bus A,
The distance to B can be minimized.

Further, in this embodiment, the operating devices 13c, 14b, 14c such as the disconnecting switch 3c, the work grounding device 4b, and the line-side grounding switch 4c are arranged so as to be operable from the space between the adjacent line lines. As a result, the operating platform can be eliminated, and the workability can be improved.

[0033]

As described above, according to the present invention, the busbar-integrated disconnector and the circuit breaker are arranged one above the other, and the L-shaped disconnector grounding device connected to the circuit breaker minimizes the distance from the circuit breaker. By being configured to be pulled out vertically upward, it is possible to reduce the size of each device to the required minimum size, reduce the size in the line direction, and improve workability such as assembly, disassembly, and operation.

[Brief description of the drawings]

FIG. 1 is a side view showing a first embodiment of a gas insulated switchgear according to the present invention.

FIG. 2 is a plan view showing a second embodiment of the gas insulated switchgear according to the present invention.

FIG. 3 is an end view cut along the line AA in FIG. 2;

FIG. 4 is a single-line diagram of the gas-insulated switchgear.

FIG. 5 is a side view showing the arrangement of a conventional gas insulated switchgear.

[Explanation of symbols]

 1a Circuit breaker 1b Circuit breaker mechanism 2a, 2b Current transformer for instrument 3a, 3b, 3c Disconnector 4a, 4b Grounding device for work 4c Line side grounding switch 5a-5d Bushing 6 Instrument transformer 7 Lightning arrester 10a, 10b Busbar-integrated disconnector 11a, 11b Detachable device 12 Disconnector grounding device 13a, 13b, 13c Operating device 14a, 14b, 14c Operating device 15 Gas-insulated busbar 16 Disconnector grounding device 17 Connection busbar 17a Connection busbar 19a-19d Connection busbar A Main bus B Main bus

Claims (3)

[Claims] A bus-integrated disconnector in which a main bus is integrated with each other is arranged at the same height so as to face each other, and a bus-side instrument current transformer is incorporated between these bus-integrated disconnectors. A T-shaped gas-insulated bus is connected, and a circuit breaker connected to a lower portion of the gas-insulated bus and incorporating a current transformer for an instrument on the line side is horizontally arranged in a direction perpendicular to the main bus. A gas insulated switchgear, wherein the switch is vertically pulled out from the circuit breaker by an L-shaped disconnector grounding device, and is drawn out of the disconnector grounding device by an L-shaped gas insulated busbar on the side opposite to the main busbar. 2. The gas insulated switchgear according to claim 1, wherein the L-shaped gas insulated bus bar is configured to be able to change a drawing direction. 3. The gas-insulated switchgear according to claim 1, wherein the L-shaped gas-insulated bus is configured such that a draw-out height can be changed.