JP2672666B2 - Gas insulated switchgear - Google Patents

Description

Description: [Object of the invention] (Field of industrial application) The present invention relates to a gas-insulated switchgear having a bypass disconnector, and more particularly to a gas-insulated switchgear with improved equipment layout. It is about.

(Prior Art) In general, a gas-insulated switchgear stores a circuit breaker, a disconnector, etc. in a container filled with SF ₆ or the like, which has excellent insulation and arc extinguishing properties, as well as equipment such as busbars. Composed of combinations. This type of switchgear can contribute significantly to downsizing as compared with an air-insulated switchgear. In recent years, in particular, gas insulated switchgear, which can be downsized, has been widely adopted in substations due to a remarkable rise in land prices. Furthermore, by rationally arranging the components, further downsizing is achieved, and the cost of the gas-insulated switchgear is reduced and the cost of construction of the substation including the building of the indoor gas-insulated switchgear is further reduced. And it becomes possible to miniaturize.

A conventional example in such a case will be specifically described 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 system having a bypass disconnector.

That is, as shown in FIG. 4, the gas-insulated switchgear 1
The circuit breaker 2 having the connection terminals 3 and 4 is provided on the upper and lower sides. An upper container for accommodating the line-side disconnector 5 and the maintenance ground switch 6 of the circuit breaker 2 is connected to the upper connection terminal 3. On the other hand, to the lower connection terminal 4 of the circuit breaker 2, a lower container for accommodating the busbar side disconnector 7 and the grounding switch 8 for maintenance of the circuit breaker 2 is connected. In addition, as shown in FIG. 5, the disconnection portions of the line-side disconnector 5 and the bus-side disconnector 7 and the maintenance ground switches 6 and 8 of the circuit breaker 2 are orthogonal to the axis of the first busbar 11. Are arranged in the direction.

Further, a connection terminal 10 is provided on the upper part of the upper container that houses the line-side disconnector 5 and the maintenance grounding switch 6, and an L-type connection busbar 14 is attached to the connection terminal 10. Further, a container is arranged on the L-shaped connection bus bar 14,
This container accommodates the branch point 15 to the bypass disconnector 23 and the line side grounding switch 9.

Further, the container for housing the branch point 15 is provided with the connection terminal 16 in the horizontal direction and the connection terminal 17 in the vertical direction. A bypass disconnector 23 is connected to the connection terminal 16, and a second busbar 12 extends through the bypass disconnector 23 in parallel with the first busbar 11. On the other hand, to the connection terminal 17, an instrument current transformer 18 and a bushing 20 which is a line terminal device are connected (see FIG. 6).

Further, a control panel 21 for controlling one line is arranged in the space below the instrument current transformer 18 or the bushing 20. Further, on the side of the bypass disconnector 23, the line side disconnector 5, the busbar side disconnector 7, and the maintenance ground switches 6 and 8 at both ends of the circuit breaker 2 are provided.
The operation boxes 22 for operating the are individually provided. Then, in the gap between the operation box 22 and the bypass disconnector 23, an inspection space for operation and maintenance of the operation box 22.
24 are provided. Further, an inspection space 25 for the circuit breaker is arranged on the back surface of the circuit breaker 2, and an inspection space 26 is also formed between the bypass disconnector 23 and the control panel 21.

(Problems to be Solved by the Invention) However, in the conventional gas-insulated switchgear having the above-described configuration, the inspection space for the component equipment is provided at three locations, so that the route for operation and maintenance is Since the line is complicated and one of the inspection spaces is provided inside the line, the line length l is also long.

The present invention has been proposed in order to solve the above problems, and is excellent in improving the operability and maintenance / inspection of the device, and enabling downsizing of the device and reduction of the building volume. Another object of the present invention is to provide a gas insulated switchgear.

[Means for Solving the Problems] (Means for Solving the Problems) In order to achieve the above object, the gas-insulated switchgear of the present invention is provided with a branch point of a bypass disconnector on the upper part of the disconnector of the line-side disconnector. The bypass disconnector and the line side disconnector are arranged in the circuit breaker, and the operation box for the line side equipment and the bypass disconnector is arranged on the side opposite to the circuit breaker.

(Operation) According to the gas-insulated switchgear of the present invention having the above-described configuration, it is necessary to provide an inspection space inside the line by disposing the operation box for the line-side device and the bypass disconnector on one side surface. There is no need to reduce the length of the line.

(Embodiment) An embodiment of the present invention will be specifically described below with reference to FIGS. 1 and 2.

The same members as those in the conventional example are designated by the same reference numerals, and the description thereof will be omitted.

That is, in the gas insulated switchgear 27 of this embodiment, the circuit breaker 2 is provided with the connection terminals 3 and 4 in opposite directions. Further, the extension line of the connection terminal 3 is provided with a grounding switch 6 for maintenance of the circuit breaker 2 and a disconnecting portion of the line-side disconnecting switch 5. Further, the line side disconnector 5 has a branch point at which the line side grounding switch 9 is connected to the lower part and the bypass disconnector 23 is connected to the upper part.
Fifteen are each connected. Furthermore, from branch point 15,
A bypass disconnector 23 is provided on the side opposite to the circuit breaker 2, and an instrument current transformer 18 is connected above the bypass disconnector 23. Also,
A bushing 20 is provided in the instrument current transformer 18.
Then, the first busbar 11 is arranged in a direction orthogonal to the container axis of the circuit breaker 2 via the disconnector of the bypass disconnector 23.

On the other hand, the busbar side disconnector 7 is connected to the connection terminal 4 of the circuit breaker 2 via the grounding switch 8 for maintenance of the circuit breaker, and the second busbar 12 is arranged in parallel with the first busbar 11. ing.
A control panel 21 is arranged in the lowermost space of the busbar-side disconnector 7.

Further, each operation box 22 of the line-side disconnector 5, the maintenance grounding switch 6, the line-side grounding switch 9 and the bypass disconnector 23
Are individually installed in the opposite direction to the circuit breaker 2.

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

According to the gas-insulated switchgear 27 of the present embodiment as described above, the inspection space can be limited to the first busbar 11 side and the second busbar 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 be downsized.

The gas-insulated switchgear of the present invention is not limited to the above-described embodiment, but can be applied to a triple bus system single wire connection diagram 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 busbar side disconnector is provided with this connecting terminal.
31 are installed. By arranging the inspection space 30 just below the busbar-side disconnector 7 shown in FIG. 1, it becomes possible to provide the third busbar 13 vertically parallel to the second busbar 12. Further, in this embodiment, as a line-side device, it can be applied to a cable terminal portion and a gas-insulated bus bar.

Further, it is possible to provide a connecting portion to the line-side terminal device in the lower part, and in this case, the line-side device can be applied to a cable terminal portion or a gas-insulated bus bar.

[Effects of the Invention] As described above, according to the present invention, the first busbar and the second busbar or the third busbar are arranged on both sides of the circuit breaker, and the operation box of the line-side device and the bypass disconnector is provided on the side of the circuit breaker. It is possible to provide an excellent gas-insulated switchgear that improves the operability, maintenance, and checkability of the equipment, and enables downsizing of the equipment and reduction of the building volume by arranging it on the opposite side.

[Brief description of the drawings]

1 and 2 are a side view and a plan view of the present embodiment, and a third view.
FIG. 4 is a single-line connection 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 connection diagram of the conventional example. 1 ... Gas-insulated switchgear, 2 ... Circuit breaker, 3, 4 ... Connection terminal, 5 ... Line-side disconnector, 6, 8 ... Maintenance earthing switch, 7 ... Bus-side disconnector, 9 ...... Track side ground switch,
10 …… Connection terminal, 11 …… First busbar, 12 …… Second busbar, 13
...... 3rd busbar, 14 …… L-type connection busbar, 15 …… Branch point, 1
6, 17 ...... Connection terminal, 18 ...... Current transformer for instrument, 20 ...... Bushing, 21 ...... Control panel, 22 ...... Control box, 23 ...... Bypass disconnector, 24, 25, 26, 28, 29 , 30 …… Inspection space, 27
...... Gas-insulated switchgear, 31 ...... Bus-side disconnector.

Claims (1)

(57) [Claims] 1. A double-bus type gas-insulated switchgear in which a first busbar is connected from a branch point between a line-side disconnector and a line terminal device via a bypass disconnector, on opposite side surfaces in opposite directions, respectively. A circuit breaker having a connection terminal, wherein a disconnecting portion of the line side disconnector is provided in an axial direction of one connecting terminal of the circuit breaker, and the branch point is arranged above the disconnecting portion, A line-side grounding switch is arranged in the lower part, and the first busbar is arranged in a direction orthogonal to the container axis of the circuit breaker via the bypass disconnector, and the other of the circuit breakers is arranged. The second busbar or the third busbar is arranged in parallel with the first busbar in the axial direction of the connection terminal through the busbar-side disconnector, and the line-side disconnector, the line-side grounding switch, and Place the operation box of the bypass disconnector on the opposite side of the circuit breaker. Gas insulated switchgear that wherein the above.