JPH0382303A - Gas-insulated switchgear - Google Patents

Abstract

PURPOSE:To improve the operability of an apparatus by providing a line side disconnector on one side of a breaker, by arranging a branch point in the upper part of the disconnector and a line side ground switch in the lower part thereof, by arranging a first bus via by-pass disconnector, by arranging second and third buses on the other side of the breaker via bus side disconnector, and by providing an operation box on the other side face of the breaker. CONSTITUTION:A breaker 2 is provided with connection terminals 3, 4, the connection terminal 3 is provided with a maintenance ground switch 6 and with the disconnecting part of a line side disconnector 5, a line side ground switch 9 and a branch point 15 for connecting a by-pass disconnector 23 are arranged in the lower part and upper part of the line side disconnector 5 respectively, and a first bus 11 is arranged via the by-pass disconnector 23. A bus side disconnector 7 is connected with the connection terminal 4 via maintenance ground switch 8 and a second bus 12 is arranged in the connection terminal. An operation box 22 for the line side disconnector 5, maintenance ground switch 9 and by-pass disconnector 23 is arranged in the opposite direction of the breaker 2. In this manner, it is possible to improve the operability of an apparatus.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a gas insulated switchgear having a bypass disconnector, and in particular to a gas insulated switchgear with an improved arrangement of equipment. It is related to.

(Prior Art) In general, gas-insulated switchgears house circuit breakers, disconnectors, etc. in a container filled with SFb, etc., which has excellent insulation and arc-extinguishing properties, and also house devices such as busbars. It is composed of a combination of This type of switchgear can significantly contribute to miniaturization compared to an air-insulated switchgear. In particular, in recent years, due to the remarkable rise in land prices,
Gas-insulated switchgears, which can be made smaller, are often used in substations. Furthermore, by rationally arranging the components, the size of the lower layer can be reduced, making it possible to reduce the cost of gas-insulated switchgear and to further reduce the cost of substation construction, including indoor gas-insulated switchgear buildings. This enables miniaturization and miniaturization.

A conventional example in such a case will be specifically explained with reference to FIGS. 4 to 6. 4 and 5 are a side view and a plan view of the gas-insulated switchgear, and FIG. 6 is a layout diagram of each device based on a single-line connection diagram of one line of a double-bus type having a bypass disconnector.

That is, as shown in FIG. 4, the gas insulated switchgear 1 includes circuit breakers 2 having connection terminals 3.4 on the upper and lower sides.

The upper connection terminal 3 is connected to an upper container that houses a track-side disconnector 5 and a maintenance earthing switch 6 for the circuit breaker 2 . On the other hand, the lower connection terminal 4 of the circuit breaker 2 is connected to a lower container that houses a busbar side new line switch 7 and a maintenance earthing switch 8 for the circuit breaker 2 . Also, as shown in Figure 5,
The disconnecting portions of the line-side disconnector 5 and the bus-side new line switch 7 and the maintenance earthing switch 6.8 of the circuit breaker 2 are arranged in a direction perpendicular to the axis of the first bus 11.

Furthermore, a connection terminal 1° is provided at the top of the upper container housing the line-side disconnector 5 and the maintenance earthing switch 6, and an L-shaped connection bus bar 14 is attached to this connection terminal 10. Further, a container is installed on this L-shaped connection busbar 14, and this container is connected to a branch point 15 to the bypass disconnector 23.
and a track side grounding switch 9.

Further, in the container housing the branch point 15, a connection terminal 16 is provided in the horizontal direction, and a connection terminal 17 is provided in the vertical direction. The connection terminal 16 has a bypass new circuit 23.
is connected to the bypass disconnector 23, and the first bus 1 is connected to the bypass disconnector 23.
A second generatrix 12 penetrates in parallel with 1. On the other hand, an instrument current transformer 18 and a bushing 20 which is a line terminal device are connected to the connection terminal 17 (see FIG. 6).

Further, a control panel 21 for controlling one line is disposed in a space below the instrument current transformer 18 or the bushing 20. Also, on the bypass disconnector 23 side, a track side disconnector 5,
Operation boxes 22 for operating the bus-side disconnector 7 and the maintenance earthing switches 6.8 at both ends of the circuit breaker 2 are individually provided.

An inspection space 24 for operation and maintenance of the operation box 22 is provided in the gap between the operation box 22 and the bypass disconnector 23. Furthermore, on the back of circuit breaker 2,
An inspection space 25 is installed for the circuit breaker, and an inspection space 26 is also installed between the new bypass switch 23 and the control panel 21.
is configured.

(Problem to be Solved by the Invention) However, in the conventional gas insulated switchgear having the above configuration, inspection spaces for component equipment are provided in three locations, so The route was complicated, and since one of the inspection spaces was provided inside the line, the length of the line 2 was also long.

The present invention was proposed to solve the above-mentioned problems, and has the advantage of improving the operability, maintenance and inspection efficiency of equipment, and making it possible to downsize the equipment and reduce the building volume. The object of the present invention is to provide a gas-insulated switchgear with a high temperature and low temperature.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the gas insulated switchgear of the present invention includes a branching point of a new bypass switch at the upper part of the disconnection section of the trackside disconnector. The circuit breaker is provided with a bypass disconnector and a line-side disconnector, and the operation box for the line-side equipment and the bypass disconnector is located on the side opposite to the circuit breaker.

(Function) According to the gas insulated switchgear of the present invention having the above configuration, by arranging the operation box of the line side equipment and the bypass disconnector on one side, it is not necessary to provide an inspection space inside the line. This allows the length of the line to be shortened.

(Example) Hereinafter, an example of the present invention will be specifically described with reference to FIGS. 1 and 2.

In addition, the same reference numerals are given to the same members as in the conventional example,
Explanation will be omitted.

That is, in the gas insulated switchgear 27 of this embodiment, the circuit breaker 2 is provided with connection terminals 3.4 in the opposite direction. Furthermore, the extension line of the connection terminal 3 is provided with a maintenance earthing switch 6 of the circuit breaker 2 and a disconnection section of the line-side disconnector 5. Further, the track-side disconnector 5 is provided with a track-side grounding switch 9 at the bottom, a branch point 15 connecting the bypass disconnector 23 at the top, and a bypass disconnector 23 on the opposite side of the circuit breaker 2. An instrument current transformer 18 is connected to the upper part. Further, a bushing 20 is disposed in the instrument current transformer 18. The first busbar 11 is arranged in a direction perpendicular to the container axis of the circuit breaker 2 via the disconnection section of the bypass disconnector 23 .

On the other hand, a busbar-side disconnector 7 is connected to the connection terminal 4 of the circuit breaker 2 via a maintenance grounding switch 8 of the circuit breaker, and the second busbar 12 is arranged parallel to the first busbar 11. ing. In addition, a control panel 21 is provided in the lowest space of the bus-side disconnector 7.
is installed.

Furthermore, each operation box 2 of the track side new circuit switch 5, the maintenance ground switch 6, the track side ground switch 9, and the bypass disconnect switch 23 is provided.
2 are individually installed in the opposite direction to the circuit breaker 2.

Further, adjacent to the control panel 21, there is provided an inspection space 28 for operation and maintenance of the busbar side disconnector 7, the maintenance earthing switch 8, the circuit breaker 2, and the control panel 21. Further, adjacent to the operation box 22, a track side disconnector 5, which is a track side device,
An inspection space 29 is provided for operating and maintaining the maintenance grounding switch 6, the track side grounding switch 9, and the bypass disconnector 23.

According to the gas insulated switchgear 27 of this embodiment as described above, the inspection space can be limited to the first bus bar 11 side and the second bus bar side. Therefore, the route of operation, maintenance, and inspection can be simplified.

As a result, the entire gas insulated switchgear can be downsized, and the building volume can also be downsized.

The gas insulated switchgear of the present invention is not limited to the embodiments described above, but can also be applied to a single line diagram of a triple busbar system as shown in FIG. That is, a connecting terminal is provided at a position adjacent to the connecting terminal 4 of the circuit breaker 2, and the added bus-side disconnector 3 is attached to this connecting terminal.
1 is installed. By arranging the inspection space 30 directly below the busbar side disconnector 7 shown in FIG.
It becomes possible to provide the third generatrix 13 vertically parallel to the second generatrix 12. Furthermore, this embodiment can also be applied to cable terminals and gas-insulated busbars as line-side equipment.

Furthermore, it is also possible to provide a connection part to a line-side terminal device at the bottom, and in this case, it can also be applied to a cable terminal part or a gas-insulated bus bar as a line-side device.

[Effect of the invention] As described above, according to the present invention, the first
By arranging the bus bar and the second bus bar or the third bus bar, and by placing the operation box of the track side equipment and bypass disconnector on the opposite side of the circuit breaker side, operability, maintenance, and inspection of the equipment are improved, and By providing superior gas-insulated switchgear that makes it possible to downsize equipment and reduce building volume.
Wear.

[Brief explanation of drawings]

Figures 1 and 2 are a side view and a plan view of this embodiment;
The figure is a single line diagram of another embodiment, FIGS. 4 and 5 are side views and plan views of the conventional example, and FIG. 6 is a single line diagram of the conventional example. 1... Gas insulated switchgear, 2... Circuit breaker, 3.4.
... Connection terminal, 5... Track side disconnector, 6.8... Maintenance grounding switch, 7... Busbar side disconnecting switch, 9... Track side grounding switch, 10... Connection terminal, 11... first bus bar, 12... second bus bar, 13... third bus bar, 14...
... L-type connection bus, 15... Branch point, 16.17...
・Connection terminal, 18... Instrument current transformer, 20... Bushing, 21... Control panel, 22... Operation box, 23.
...Bypass disconnector, 24.25.26.28.29.
30...Inspection space, 27...Gas insulated switchgear, 31...Bus bar side disconnector.

Claims (1)

[Claims] In a double-bus type gas-insulated switchgear that connects a first bus bar from a branch point between a track-side disconnect switch and a track terminal equipment via a bypass disconnect switch, on both sides in opposite directions, Each circuit breaker is provided with a circuit breaker having a connection terminal, a disconnection section of the line-side disconnector is provided in the axial direction of one connection terminal of the circuit breaker, the branch point is disposed above the disconnection section, and the disconnection section a track side grounding switch is disposed at the bottom of the circuit breaker, and the first busbar is disposed in a direction perpendicular to the vessel axis of the circuit breaker via the bypass disconnector; A second busbar or a third busbar is arranged in the axial direction of the other connection terminal in parallel to the first busbar via a busbar-side disconnector, and the trackside disconnector and trackside earthing switch are arranged in parallel to the first busbar. and a bypass disconnector operation box disposed on the opposite side of the circuit breaker.