JPS623646B2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a gas insulated switchgear,
In particular, the present invention relates to a support system for a busbar of a gas-insulated switchgear to which a so-called double busbar-shuttle busbar system is applied.

The conventional gas-insulated switchgear with double busbar and breaker busbar system is as shown in Figures 1 to 5.
The figure is a plan view, FIG. 2 is a side view, FIG. 3 is a plan view with the generatrix omitted, and FIG. 4 is a single line diagram. In the attached drawings below, parts for A phase are marked with A after the number and B.
Phase use is represented by B, and C phase use is represented by C.

In a conventional gas insulated switchgear, as shown in FIGS. 1 and 2, one set of external drawer units includes, for example, a bushing 1A connected to an overhead power transmission line (not shown), a disconnector 2A connected thereto, etc. , disconnectors connected to this disconnector 3A, etc., one group of busbar switching disconnectors 4A, etc., another group of busbar switching disconnectors 5A, etc., these two groups of busbar switching disconnectors. Intermediate connection parts 10A, etc. that connect each phase, and other connection parts and current transformers (both not shown)
Consisting of Another set of external drawer units includes, for example, cable head 7'A, cable disconnector 3'A, etc.
An intermediate connection section 1 that connects these two groups of busbar switching disconnectors for each phase, such as a group busbar switching disconnector 4'A, etc., and another group busbar switching disconnector 5'A, etc.
0'A, etc., and other components such as connecting parts and current transformers (both not shown).

The busbar switching disconnectors for the two sets of external drawer units are arranged in a rectangular manner so that disconnectors 4A and 4'A face each other, and disconnectors 5A and 5'A face each other.
and 5A are connected to the connection part 10 across the intermediate connection part 10A.
placed on both sides of A and interconnected through this,
At the same time, it is connected to the shield disconnector 3A. As shown in FIG. 3, disconnectors 4'A and 5'A are similarly connected via intermediate connection 10'A. Further, the busbar switching disconnectors 4A and 4'A are connected to the connecting parts 20A and 20' via the branch connecting part 11A, as shown in FIG.
They are electrically connected at A.

The branch connection part 11A is made to stand vertically, and the other branch connection parts 11B, 11C, and 12 which play the same role
A, 12B, 12C are arranged in a line almost on the same straight line, and a set of busbars 8A, 8B, 8C are located above, middle and below on one side of the row of branch connections, and the branch connections and disconnectors are connected to each other. On the other side of the column, another set of busbars 9A, 9B, and 9C are also arranged at the top, middle, and bottom.

Further, as shown in FIGS. 4A, 4B, and 4C, the branch connection portion 11A is connected to the bus bar 8A, etc. via the connection portion 22A, and the branch connection portion 11A is connected to the bus bar 8A, etc.
1B connects to the branch connection 11C via the connection 22B.
are connected to the busbars 8A and 8 via the connection portion 22C, respectively.
It is electrically connected to B and 8C. Although not shown, branch connection portions 12A, 12B, and 12C are electrically connected to bus bars 9A, 9B, and 9C, respectively.

Electrical connections are as shown in the single line diagram in FIG. In FIG. 5, A, B, and C representing each phase are omitted from the symbols.

The disadvantage of conventional gas insulated switchgear is that the busbar 8A,
The uppermost phase of 8B, 8C and 9A, 9B, 9C is located extremely high above the ground, which has disadvantages in terms of strength such as not being favorable for earthquake resistance, or because it is located at a high position, installation There are disadvantages in terms of work and maintenance.

This invention was made in order to eliminate the drawbacks of the conventional ones as described above, and aims to provide a more economical gas insulated switchgear that is safer in terms of strength, easier to install, and more economical. By arranging one phase of a set of busbars below the busbar switching disconnector, a gas-insulated switchgear is provided in which the heights of the remaining two-phase busbars are lowered.

The present invention will be specifically described below with reference to the drawings showing one embodiment thereof.

Figures 6-9C, especially Figures 7 and 9A, 9B, 9C
As clearly shown in the figure, in the present invention, one phase of the bus bar, for example, in the illustrated embodiment, the C phase bus bar 8
C, 9C to the lower side of the disconnector, that is, the connection part 20A,
20'A (FIG. 7), and as shown in FIG. 9C, the bus bar 8C is electrically connected to the branch connection portion 11C by the connection portion 22C. Therefore, the C phase bus bar 8 of the conventional gas insulated switchgear bus bar
According to the present invention, the bus bar 8B can be placed at the position where the bus bar C (FIG. 4C) was located.
In the present invention, the bus bar 8A is placed at the position B, and there is nothing at the height corresponding to the conventional bus bar 8A, and in the end, the height corresponding to one phase of the bus bar is can be lowered.
That is, according to the present invention, the K dimension shown in FIGS. 4A to 4C can be made smaller as shown in FIGS. 9A to 9C.

Reducing the height of the busbars in this way not only increases the seismic strength of the device, but also increases the seismic strength of the device.
This is advantageous in terms of the bus bar support function of B and 12C. For example, according to the present invention, the thickness of the branch connection part may be thinner than that of the conventional one, and the length is also shortened, which is economical.

In addition, by locating the bus bar at a low location, work at heights is reduced, and a large crane or the like is not required during installation, which shortens installation time.

Further, from the viewpoint of environmental harmony with the surroundings of gas insulated switchgear, it is always more desirable to have a device with a short profile.

As described above, according to the present invention, since the bus bar is configured to be lowered, the gas insulated switchgear can be economically constructed and is easy to install.
This has the effect of producing products that are environmentally friendly.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing an example of a conventional gas-insulated switchgear, Fig. 2 is a side view of the switchgear shown in Fig. 1, and Fig. 3 is a plan view similar to Fig. 1 with the bus bar removed. 4A, 4B, and 4C are side views showing how the bus bar of the switchgear shown in FIG. 1 is supported, FIG. 5 is a single line diagram of the switchgear shown in FIG. 1, and FIG. 6 is a gas-insulated switchgear according to the present invention. FIG. 7 is a side view of the embodiment shown in FIG. 6, FIG. 8 is a plan view of the embodiment shown in FIG. 6 with the generatrix removed, FIG. 9A,
9B and 9C are partial side views showing the arrangement and connection of the busbars in the embodiment shown in FIG. 6, respectively. 1A, 1B, 1C...Butsing, 2A, 2
B, 2C...Disconnector, 3A, 3B, 3C, 3'
A, 3'B, 3'C...Shiya disconnector, 4A, 4B, 4
C, 4'A, 4'B, 4'C, 5A, 5B, 5C,
5'A, 5'B, 5'C... Bus bar switching disconnector,
7'A, 7'B, 7'C...Cable head, 8
A, 8B, 8C, 9A, 9B, 9C... bus bar, 1
0A, 10B, 10C, 10'A, 10'B, 1
0'C...Intermediate connection part, 11A, 11B, 11
C, 12A, 12B, 12C...branch connection, 2
0A, 20B, 20C, 20'A, 20'B, 2
0'C, 21A, 21B, 21C, 21'A, 2
1'B, 21'C, 22A, 22B, 22C... Connection part.

Claims (1)

[Claims] 1 Consisting of multiple sets of external drawer units, etc., each consisting of gas-insulated disconnectors, disconnectors, etc., and two sets of gas-insulated busbars for each phase,
Two sets of units such as external drawers are equipped with busbar switching disconnectors facing each other for each phase, and are extended in a direction perpendicular to the connection direction with these disconnectors to connect each phase busbar of each group to the disconnector. In a gas-insulated switchgear comprising branch connections arranged in a substantially straight line in a gas insulated switchgear, each set of busbars is arranged on both sides of the row of branch connections, one phase of each of the two sets of busbars is provided. busbars for each of the two sets of external drawers, etc. are arranged below the busbar switching disconnector connections for units such as external drawers, and the remaining busbars for each of the two phases are arranged above the above-mentioned disconnector connections. Characteristic gas insulated switchgear.