JP2601238B2 - Gas insulated switchgear - Google Patents

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 an 11/2 type gas insulated switchgear.

[0002]

2. Description of the Related Art In general, a gas insulated switchgear called an 11/2 circuit breaker system is known as an example of a substation configuration in a system having an extra-high voltage or higher. The 11/2 circuit breaker system basically comprises three circuit breakers connected in electrical series and connected between a pair of main buses.
No. 59-59002.

FIGS. 5 and 6 show the above-described gas insulated switchgear. FIG. 5 is a plan view and FIG. 6 is a front view.

The three circuit breakers 3, 4, and 5 are linearly arranged, and disconnectors 6 to 11 are arranged on both sides of each circuit breaker, respectively, and these are electrically connected in series. The disconnectors 6, 11 are connected to the main buses 1, 2, respectively. The main buses 1 and 2 are arranged substantially parallel to both sides of the series configuration of each circuit breaker and each disconnector. A bushing 12 is connected between the disconnectors 7 and 8 and between the disconnectors 9 and 10, respectively.
13 are established, and the bushings 12 and 13 electrically connect the transmission line retained to the pylon with the gas insulated switchgear.

[0005]

A conventional gas insulated switchgear of the 11/2 circuit breaker type is constructed as described above, and each of the circuit breakers 3 to 5 and each of the disconnectors 6 to 11 are arranged in a horizontal direction parallel to the installation surface. Because of the arrangement, the space between the main buses 1 and 2 became large, and the gas insulated switchgear required a large site area.

An object of the present invention is to provide a gas insulated switchgear having a reduced site area by reducing the direction of the main bus.

[0007]

In order to achieve the above-mentioned object, the present invention comprises connecting three circuit breakers each having a disconnector on each side in series between a pair of main buses arranged substantially in parallel. In the gas-insulated switchgear, each of the circuit breakers is a vertical circuit breaker having an upper connection portion and a lower connection portion, and only one of the circuit breakers is oriented with respect to the bus bar of the other circuit breaker and the upper connection portion and the lower connection portion. Are different from each other in the gas insulated switchgear.

[0008]

According to the present invention, the vertical circuit breakers and the vertical disconnectors can be arranged close to each other so that the distance between the main buses can be reduced. Since the connection between the devices is made between the upper connection portion and the lower connection portion, the width direction can be reduced without unnecessarily increasing the height of the constituent devices.

[0009]

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

FIG. 1 is a plan view showing an 11/2 circuit breaker type gas insulated switchgear, and FIG. 2 is a front view thereof.

The main buses 1 and 2 are arranged substantially parallel to each other at a predetermined distance near the laying surface, and three vertical circuit breakers 3, 4 and 5 and vertical disconnectors 7 to 10 are provided between the main buses 1 and 2. And a configuration centered on the above. Each of the vertical circuit breakers 3, 4, and 5 has an upper connection portion and a lower connection portion on the left and right of the upper and lower portions, respectively. The vertical disconnectors 7 to 10 located between the respective circuit breakers also have the upper and lower portions. Has an upper connecting portion and a lower connecting portion on the left and right sides, respectively. The vertical disconnectors 7 to 10 located between the vertical circuit breakers 3, 4, and 5 are connected to each of the vertical circuit breakers, with the upper connecting portion being connected to the upper connecting portion of the vertical circuit breaker and the lower connecting portion being vertically disconnected. Each is connected to the lower connection part of the container. Therefore, the vertical circuit breakers 3 to
The connection between 5 and the vertical disconnectors 7 to 10 is made by the upper connection portion or the lower connection portion. However, a lower connecting portion and an upper connecting portion are connected between the vertical disconnectors 7 and 8, and a bushing 12 is established at the connecting portion. A lower connecting portion is connected between the vertical disconnectors 9 and 10, and a bushing 13 is established at this connecting portion. The aerial terminals of the heads of the bushings 12 and 13 are connected to a staying tower 20 by a glass 21 and electrically insulated from the dropping wire 2.
They are connected to transmission lines 24 and 25 via 2, 23 and the like.

The connection between the vertical circuit breakers 3 and 5 and the main buses 1 and 2 is made via the vertical disconnectors 6 and 11 for the main bus, and the upper connecting portion of the vertical disconnector 6 for the main bus is connected to the vertical circuit breaker. 3 is connected to the lower connection part of the vertical breaker 5, and the upper connection part of the vertical disconnector 11 for the main bus is connected to the lower connection part.

In this embodiment, in the vertical circuit breakers 3 to 5 and the vertical disconnectors 7 to 10, the operation direction of the mover formed inside the closed vessel is also vertical in the vertical direction.

By making the circuit breakers and disconnectors vertical as described above, the vertical circuit breakers 3 to 5 and the vertical disconnectors 7-1 are formed.
0 can be arranged close to and connected to each other, so that the required distance between the main buses 1 and 2 is reduced, and the site area of the entire substation can be reduced.

In this embodiment, the main buses 1 and 2 are of a three-phase type and the others are phase-separated, but the main buses 1 and 2 may be of a phase-separated type. A disconnecting disconnector can also be configured below the bushings 12, 13 as required.

FIGS. 3 and 4 are a plan view and a front view showing another embodiment of the present invention.

In this embodiment, cables 14 and 15 are used in place of the bushings 12 and 13 in the previous embodiment, and the insulation lead-out means can be used without being limited to the bushing. In particular, since a predetermined air insulation distance is required between the bushings 12 and 13 in FIG. 2, the connection between the vertical disconnectors 7 and 8 or the connection between the vertical disconnectors 9 and 10 is made in consideration of the insulation distance. Although it is conceivable that a connection bus is required, according to this embodiment, the connection bus is not required, and the effects of the vertical circuit breaker and the vertical disconnector can be sufficiently exhibited. The same reference numerals are given to the equivalents in both embodiments, and the detailed description is omitted.

In each of these embodiments, the vertical circuit breakers 3 to
The connection between the vertical disconnectors 5 and the vertical disconnectors 7 to 10 is made to be the upper connection part or the lower connection part, so that the height of each component device is unnecessarily increased by preventing the constituent devices from being vertically formed, thereby preventing the seismic resistance from being lowered. This means that the vertical disconnectors 9, 1 in FIG.
It can be easily understood by comparing 0 with those using a lower connecting portion for connection to both the vertical circuit breakers 4 and 5. In this case, the position of the bushing 13 is unnecessarily increased, and the support base or the like becomes large.

[0019]

As described above, according to the present invention, the vertical circuit breaker and the vertical disconnector are used, and the connection between them is either the upper connection part or the lower connection part.
The site area can be reduced by reducing the distance between the main buses, and the height can be prevented from increasing unnecessarily.

[Brief description of the drawings]

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

FIG. 2 is a front view of a gas-insulated switchgear according to one embodiment of the present invention.

FIG. 3 is a plan view of a gas-insulated switchgear according to another embodiment of the present invention.

FIG. 4 is a front view of a gas insulated switchgear according to another embodiment of the present invention.

FIG. 5 is a plan view of a conventional gas insulated switchgear.

FIG. 6 is a front view of a conventional gas insulated switchgear.

[Explanation of symbols]

1, 2, main bus, 3-5, vertical breaker, 7-10, vertical disconnector.

Claims (1)

(57) [Claims] 1. A gas insulated switchgear comprising three circuit breakers each having a disconnector on each side thereof connected in series between a pair of main buses arranged substantially in parallel, wherein each of the circuit breakers has an upper connecting portion and A gas insulated switchgear comprising a vertical circuit breaker having a lower connection portion, wherein only one of the circuit breakers has a different orientation of the upper connection portion and the lower connection portion with respect to the bus bar from other breakers.