JPS6321406B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a gas insulated switchgear, and in particular to the arrangement of a bus voltage transformer in a gas insulated switchgear to which a so-called double bus or disconnection bus system is applied. It is.

A conventional gas-insulated switchgear with a double busbar and a disconnection busbar system is as shown in Figures 1 to 6. As shown in Figures 1 to 4, one set of external draw-out units is represented by a bushing connected to an overhead power transmission line (not shown). 1A, etc., a disconnector 2A, etc. connected to this disconnector, a disconnector 3A, etc. connected to this disconnector, a disconnector 4A, etc. for group 1 bus switching, other 1
From the group busbar switching disconnector 5A, etc., the intermediate connection part 10A that connects these two groups of busbar switching disconnectors for each phase, and other connecting parts and current transformers (both not shown). Become. Another set of external drawer units, such as cable head 7'A, etc.
1 group of bus bar switching disconnectors 4'A, such as cable disconnectors 3'A
etc., another group of busbar switching disconnectors 5'A, etc., an intermediate connection part 10'A that connects these two groups of busbar switching disconnectors for each phase, and other connecting parts and current transformation. It consists of a container (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. 4, disconnectors 4'A and 5'A are also connected via an 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, for example, are arranged on almost the same straight line, and a set of busbars 8A, 8B, 8C are located on one side of the row of these branch connection parts in the upper middle and lower,
The other set of busbars 9A, 9B, 9C are arranged above the connection point between the branch connection and the disconnector, and at the other end of the row.
As expected, they are placed at the top, middle, and bottom.

Further, as shown in FIGS. 5A, 5B, and 5C, the connection between the branch connection portion 11A, etc., and the bus bar 8A, etc. is made by connecting the branch connection portion 11A to the branch connection portion 1
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.
B, 8C, electrically connected. Although not shown, branch connection portions 12A, 12B, and 12C are electrically connected to bus bars 9A, 9B, and 9C, respectively.

In addition, as shown in Figures 1, 3, and 4, busbar instrument transformers 23A, 23B, 23C, 24A, 2
4B and 24C are branch connection parts 11A, 11B, 11C, and 12 that are separate from the units such as the above-mentioned external drawers.
A, 12B, 12C, the above busbars 8A, 8
It is electrically connected to B, 8C, 9A, 9B, and 9C, and is arranged as a busbar instrument transformer unit.

The electrical connections are as shown in the single line diagram in FIG. In FIG. 6, A, B, and C representing each phase are omitted from the symbols.

The disadvantage of conventional gas-insulated switchgear is that it is impossible to put the busbar voltage transformer in a unit such as an external drawer, so a dedicated space is required for the busbar transformer unit, similar to the external drawer unit. The gas insulated switchgear as a whole required a large installation area. In addition, a connection part is required for electrical connection, and if there is no other unit facing the busbar instrument transformer unit, the busbar and branch connections are also required, which is economically disadvantageous. Ta.

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 with a reduced installation area. We provide gas-insulated switchgear that incorporates busbar instrument transformers.

The invention will now be described in detail with reference to the drawings illustrating one embodiment thereof.

As shown in Figures 7 to 10, disconnectors 4A, 5A, 4
B, 5B, 4C, 5C, 4'A, 5'A, 4'B,
5'B, 4'C, and 5'C are cylindrical in shape and the axial direction of the cylinder is arranged in the vertical direction, so-called vertical disconnectors are used to connect busbar switching disconnectors and branch connections 11A, 12A. , 11B, 12B, 11C, 12
Connections with C are vertical disconnectors 4A, 5A, 4B, 5
B, 4C, 5C, 4'A, 5'A, 4'B, 5'B,
Connecting parts 20A, 21A, 20B, 21B, 20C, horizontally from the bottom of 4'C, 5'C, respectively.
21C, 20'A, 21'A, 20'B, 21'B,
This is done through 20'C and 21'C. Further, connections between the busbar switching disconnectors in the unit are made in the horizontal direction from above the vertical disconnectors through the intermediate connection portion 10A and the like.

In addition, vertical disconnectors 5A, 5B, 5C, 4'A,
horizontally from the bottom of 4'B and 4'C, and
The connection parts 21A, 21B, 21C, 20'A,
Busbar voltage transformers 24A, 24B, 24C, 23A, and
Connect 23B and 23C.

By doing so, it becomes possible to put the busbar voltage transformer in a unit such as an external drawer. It is also possible to include two busbar voltage transformers in a unit such as one external drawer.

That is, the conventional system, which requires an area equivalent to one unit for a busbar voltage transformer, and also requires a busbar, a branch connection, etc., becomes unnecessary. Further, in the above embodiment, a three-stage bus bar system has been described, but the same effect can be obtained even if the bus bar system is horizontally arranged.

As described above, according to the present invention, since the busbar voltage transformer is housed in a unit such as an external drawer, the gas insulated switchgear can be downsized, which can be done economically, etc. There is an effect.

[Brief explanation of the drawing]

Figure 1 is a plan view showing an example of a conventional gas insulated switchgear, Figure 2 is a side view taken along the line in Figure 1, and Figure 3 is a side view taken along the line in Figure 1. A side view, FIG. 4 is a plan view similar to FIG. 1 with the bus bar removed, FIGS. 5A, 5B, and 5C are side views showing how the bus bar of the switchgear shown in FIG. 1 is supported, and FIG. 1 is a single line diagram of the switchgear, FIG. 7 is a plan view showing one embodiment of the gas insulated switchgear according to the present invention, FIG. 8 is a side view taken along the line - in FIG. 7, and FIG. 7 is a side view along the line KK, and FIG. 10 is a plan view similar to FIG. 7 with the generatrix removed. 1A, 1B, 1C...Butsing, 2A, 2
B, 2C...Disconnector, 3A, 3B, 3C, 3'A,
3'B, 3'C...Shiya breaker, 4A, 4B, 4C,
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, 8A, 8B,
8C, 9A, 9B, 9C... Bus bar, 10A, 10
B, 10C, 10'A, 10'B, 10'C...Intermediate connection part, 11A, 11B, 11C, 12A, 1
2B, 12C...branch connection, 20A, 20B,
20C, 20'A, 20'B, 20'C, 21A,
21B, 21C, 21'A, 21'B, 21'C,
22A, 22B, 22C...Connection part, 23A, 2
3B, 23C, 24A, 24B, 24C... Busbar instrument transformer.

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 including branch connection parts that are connected and arranged in a substantially straight line, and each set of busbars is arranged on both sides of the row of branch connection parts, a vertical disconnector is used as the busbar switching disconnector. By connecting the busbar voltage transformer horizontally to the opposite side of the connection part on the extension of the connection part that connects the lower part of the disconnector and the branch connection part, A gas-insulated switchgear characterized by incorporating a busbar instrument transformer.