JPH05292613A - Gas insulated switchgear - Google Patents

Abstract

PURPOSE:To provide a gas insulated switchgear for double bus system in which removing work of ground switch is not required at the time of extension work of main bus or removing work of a machine while furthermore safety is enhanced and downtime is shortened at the time of field installation work. CONSTITUTION:First and second main buses 1, 2, disposed in parallel on a horizontal plane, are connected with first and second disconnectors 3, 4, respectively, wherein the first disconnector 3 is connected, at one side thereof, with a circuit breaker 5 and, at the other side thereof, with one end of the first connecting bus 9 provided with a ground switch 11 in the direction perpendicular to the longitudinal direction of a conduit. The first connecting bus 9 is connected, at the other end thereof, with one side of the disconnector 4 through a connecting bus 10.

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 installed in a substation, switchgear, or the like.

[0002]

2. Description of the Related Art A double-bus type gas-insulated switchgear using an insulating gas as an insulating medium is disclosed, for example, in Japanese Utility Model Laid-Open No. 59-9.
It is conventionally known as described in Japanese Patent No. 718.

FIG. 4 is a front view of a conventional double-bus type gas-insulated switchgear disclosed in the above publication. As shown in the figure, a conventional double-bus type gas-insulated switchgear includes a first main bus 1 and a second main bus 2 which are arranged in parallel on a horizontal plane. The lower ends of the first disconnecting switch 3 and the second disconnecting switch 4 are connected to the upper side of the above. One end of the circuit breaker 5 is connected to one side of the first disconnecting switch 3, and the second grounding switch 6 is connected to the other side of the second disconnecting switch 4 in the horizontal direction. Furthermore, the other side of the first disconnecting switch 3 and one side of the second disconnecting switch 4 are connected by a connecting bus bar 7 arranged horizontally. Figure 5
[Fig. 6] is a front view showing a conventional gas-insulated switchgear in a state of only one main bus before adding a main bus. As shown in this figure, before adding the second main bus 2, the first disconnector 3
The first grounding switch 8 is connected to the other side in the horizontal direction.

Next, the procedure for adding a main bus will be described with reference to FIGS. First, from the state in which only the first main bus 1 shown in FIG. 5 is installed, as shown in FIG. 6, the second disconnecting switch 4 to which the second grounding switch 6 is connected is set to a predetermined position. Install. Then, as shown in FIG. 7, the first grounding switch 8 is removed, and the first connecting bus bar 7 is connected to the first disconnecting switch 3.
And it inserts between the 2nd disconnecting switch 4, and each of these disconnecting switches 3 and 4 is connected.

[0005]

In the conventional gas-insulated switchgear described above, the main busbar and the busbar-side disconnector are installed in the equipment planned to be installed in the future when they are additionally installed or in the event of a malfunction. It is necessary to remove or additionally install the grounding switch when removing the equipment, which causes an increase in on-site work and increases the downtime of the equipment.
There was also a safety issue.

The present invention has been made in order to solve the above-mentioned problems, and in a gas insulated switchgear of a double busbar system, a grounding switch is installed at the time of additional construction of a main busbar or the removal of equipment. By eliminating the need for removal work, it is intended to improve safety during on-site installation work and reduce equipment downtime.

[0007]

A gas-insulated switchgear according to the present invention is provided with a grounding switch for grounding a main circuit, which is orthogonal to the longitudinal direction of a connecting busbar connecting between busbar-side disconnectors. is there.

[0008]

According to the present invention, the grounding switch for grounding the main circuit is provided at right angles to the longitudinal direction of the connecting busbars connecting the busbar-side disconnectors. It is not necessary to remove the grounding switch even in the event of an accident, and it is possible to reduce equipment downtime during on-site work.Also, when working with the main bus in a live state, the connection bus Because you can surely ground the part,
Safe local work can be realized.

[0009]

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

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

The gas-insulated switchgear of this embodiment is provided with a first main bus 1 and a second main bus 2 which are arranged in parallel on a horizontal plane, and above each of these main buses 1 and 2. The respective lower ends of the first disconnector 3 and the second disconnector 4 are connected to each other. Then, one end of the circuit breaker 5 is connected to one side of the first disconnector 3, and one end of the horizontally arranged first connecting busbar 9 is connected to the other side of the first disconnector 3. Further, the other end of the first connection busbar 9 and one side of the second disconnector 4 are connected by a second connection busbar 10. A grounding switch 11 is connected to the first connecting busbar 9 in a direction orthogonal to the longitudinal direction of the pipeline. FIG. 2 is a front view showing a gas-insulated switchgear according to an embodiment of the present invention in a state of only one main bus bar before the main bus bar is added. As shown in this figure, before adding the second main bus 2,
The first connecting busbar 9 is connected to the other side of the first disconnector 3.
The ground switch 11 is connected in a direction orthogonal to the longitudinal direction of the first connection bus bar 9.

Next, the procedure for adding a main bus will be described with reference to FIGS. First, from the state where only the first main bus 1 shown in FIG. 2 is installed, as shown in FIG. 3, the second main bus 2 to which the second disconnector 4 is connected is installed at a predetermined position. Then, the second connecting bus bar 10 is inserted between the first connecting bus bar 9 and the second disconnecting switch 4 for connection.

According to this embodiment, since the grounding switch 11 is installed in the direction orthogonal to the pipeline of the first connecting busbar 9, the first connecting busbar 9 and the second disconnecting switch 4 are connected to each other. Second between
The main busbar can be expanded simply by connecting the connection busbar 10 of the above, and therefore, it is not necessary to remove the grounding switch, and it is possible to reduce the downtime of the facility at the time of on-site work. Since safe grounding can be carried out at the portion of the connecting busbar even during work in a line state, safe field work can be performed.

The device for grounding the main circuit may be either permanent equipment or a simple temporary tool.

[0015]

As described above, according to the present invention, since the grounding switch is provided in the connecting busbar portion that connects the busbar-side disconnectors, the main busbar can be added at any time. There is no need to remove the grounding switch even when responding to an accident, and it is possible to obtain a highly reliable gas-insulated switchgear that can improve safety during on-site installation work and reduce equipment downtime.

[Brief description of drawings]

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

FIG. 2 is a front view showing a gas-insulated switchgear according to an embodiment of the present invention before the main bus bar is added.

FIG. 3 is a front view showing a gas-insulated switchgear according to an embodiment of the present invention in a state before connection of connection busbars.

FIG. 4 is a front view of a conventional double-bus type gas-insulated switchgear.

FIG. 5 is a front view showing a conventional gas-insulated switchgear in a state before adding a main bus bar.

FIG. 6 is a front view showing a conventional gas-insulated switchgear in a state before connecting a connecting bus bar.

FIG. 7 is a front view of a conventional gas-insulated switchgear for explaining a grounding switch removal work and a connection busbar installation work.

[Explanation of symbols]

 1 1st main bus 2 2nd main bus 3 1st disconnecting switch 4 2nd disconnecting switch 9 1st connecting busbar 10 2nd connecting busbar 11 Grounding switch

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI technical display location 13/06 A

Claims (1)

[Claims] 1. A first and a second main busbar, a first and a second busbar-side disconnector connected to each of these mainbusbars, and a connecting busbar connecting between these respective busbar-side disconnectors. A gas-insulated switchgear of a double bus bar system comprising: a gas-insulated switchgear which is orthogonal to the longitudinal direction of the connecting busbar and which grounds the main circuit.