JPH0811014Y2 - Gas insulated switchgear - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas-insulated switchgear, and more particularly to a method for arranging a main busbar thereof.

[0002]

2. Description of the Related Art FIG. 3 is a side view showing, for example, a partial cross-section of a conventional phase-separated type gas-insulated switchgear shown in "Electrical Cooperation Research Vol. Is. In the figure, 1A to 1C are the first of A phase to C phase, respectively.
, And the first main buses 1A to 1C are
They are arranged in the same plane and extend parallel to each other in a direction perpendicular to the drawing. 2A to 2C are A
Phase-to-C-phase second main busbars, and these second main busbars 2A to 2C are arranged in the same plane parallel to the arrangement surface of the first main busbars 1A to 1C, and Extend parallel to each other in a direction perpendicular to. Further, these first main buses 1A to 1C and second main buses 2A to 2C are
It forms a double busbar.

Reference numeral 3 extends in a direction orthogonal to the first main buses 1A to 1C, and for each phase, the first main buses 1A to 1C.
Is a three-phase first branch busbar connected to, and these first branch busbars 3 are arranged in the same plane,
In the figure, only the phase A is shown. Reference numeral 4 denotes a three-phase second branch busbar that extends in a direction orthogonal to the second main busbars 2A to 2C and is connected to the second main busbars 2A to 2C for each phase. The second branch bus bar 4 is arranged in the same plane, and only the A-phase one is shown in the drawing.

Reference numeral 5 is a first disconnecting switch connected to the first branch busbar 3, and 6 is a second disconnecting busbar 3 and the first disconnector 5.
Is connected to the second disconnector, 7 is a circuit breaker connected to the second disconnector 6, and 8 is a second disconnector 6 and a circuit breaker 7.
A first current transformer provided between the circuit breaker 7 and a third disconnector 9 connected to the circuit breaker 7; and 10 provided between the circuit breaker 7 and the third circuit breaker 9. Second current transformer, 11 is third
Cable head tank connected to disconnector 9 of 12
Is a cable head provided in the cable head tank 11, and 13 is a cable connected to the cable head 12.

In the conventional gas-insulated switchgear as described above, the cross section of the A-phase switchgear is shown in the figure. However, three phases of the same structure constitute one unit, and each phase has a unit. It is connected to the main buses 1A to 1C and 2A to 2C. Usually, such units are arranged in a direction perpendicular to the drawing.

A transmission line (not shown) is provided at the end of the cable 13.
And a transformer (not shown) are connected to the circuit breaker 7
By opening and closing the disconnecting switches 5, 6 and 9 as necessary, the electric circuit is switched on and off and switched. In such a gas-insulated switchgear, the busbars and equipment are gas-insulated, so the insulation distance is reduced compared to switchgear using air-insulated switchgear and busbars, resulting in a required installation area. Has been greatly reduced.

[0007]

[Problems to be Solved by the Invention] However, in recent years, it has become necessary to further reduce the required installation area and miniaturize the components to improve the economic efficiency due to the soaring land prices and the increase in the power demand in urban areas. ing. On the other hand, the conventional gas-insulated switchgear configured as described above has a problem that it is not sufficient in terms of reduction of the installation area and downsizing of the whole.

The present invention has been made to solve the above-mentioned problems, and it is possible to downsize the whole and to sufficiently reduce the installation area and to improve the economical efficiency. The object is to obtain a gas-insulated switchgear capable of

[0009]

In a gas-insulated switchgear according to the present invention, a two-phase main bus bar is arranged on one side of a surface on which a branch bus bar is arranged, and the remaining one-phase main bus bar is arranged on the other side. The main bus is arranged.

[0010]

In the present invention, the main busbars are distributed and arranged on both sides of the branch busbar, whereby the length of the branch busbar is shortened and the installation area is reduced.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to the drawings. 1 is a side view showing a partial cross section of a gas insulated switchgear according to an embodiment of the present invention, and FIG. 2 is a plan view of FIG.
The same or corresponding parts as those in FIG. 3 are designated by the same reference numerals, and the description thereof will be omitted. In the figure, 21A to 21C are first main buses of A phase to C phase, which are arranged in parallel to each other, 22A to 22C.
C is the second of A phase to C phase which are arranged in parallel to each other.
Is the main bus.

23A to 23C are first main buses 21A to 21C, respectively.
21C is a three-phase first branch busbar extending in a direction orthogonal to 21C and connected to the first main busbars 21A to 21C for each phase. These first branch busbars 23A to 23C are , Are arranged in the same plane. 24A to 24C are first branch buses of three phases that extend in a direction orthogonal to the second main buses 22A to 22C and are connected to the second main buses 22A to 22C for each phase. , These first branch buses 24A ~
24C is arranged in the same plane.

A-phase and B-phase first main buses 21A and 21B
Are arranged above the arrangement surface of the first branch buses 23A to 23C. The first and second main buses 21C and 22C of the C phase are
Arrangement surface of first branch busbars 23A to 23C and second branch busbar 24
It is arranged between the arrangement planes A to 24C. Phase A and B
The second main buses 22A and 22B of the phase are the second branch buses 24A to
It is placed below the placement surface of 24C.

First and second branch buses 23A-23C, 24A
First and second disconnectors 5, 6, and a circuit breaker 7 and first and second current transformers 8, 10 are connected to both ends of 24C, respectively. Each of the circuit breakers 7 is a vertical type. The third disconnector 9 connected to the circuit breaker 7 on one side (left side in FIG. 1) is integrated with the cable head tank 11.

25 is a fourth disconnecting switch connected to the other circuit breaker 7, and 26 is a bushing above the fourth disconnecting switch 25.
An overhead transmission line connected via 27 and a lightning arrester 28 connected to the lower part of the fourth disconnector 25 to limit an excessive current due to lightning.

As shown in FIG. 2, the central first main bus 21
Units of three phases are provided on both sides of A to 21B, and each unit is connected to main buses 21A to 21C and 22A to 22C for each phase. For large gas-insulated switchgear, main buses 21A-21C, 22A-22C
Are extended and many similar units are juxtaposed.

In the gas-insulated switchgear configured as described above, the first and second main buses 21A to 21C and 22A to
Since the 22Cs are respectively arranged vertically, the space in the width direction is reduced by one phase, and the lengths of the first and second branch buses 23A to 23C and 24A to 24C are reduced to 2/3 of the conventional one. It is downsized and the whole is downsized,
Installation area is reduced. In addition, the first branch bus 23A ~
Since the space that was conventionally wasted between the arrangement surface of 23C and the arrangement surface of the second branch busbars 24A to 24C is used, the arrangement space in the height direction of the busbar portion does not become large, but is rather high. Even if it happens, the effect of reducing the installation area is large, and it is economically excellent as a whole.

Further, in this embodiment, since the units are arranged on both sides of the first and second main buses 21A to 21C and 22A to 22C, the first and second units are arranged as compared with the one side arrangement as in the conventional example. The length of the two main buses 21A to 21C and 22A to 22C can be halved. Further, in the apparatus of this embodiment, the respective devices are arranged in an appropriate maintenance space with no wasted space. Furthermore, in the device of this embodiment, the overhead line
Since the external connection part such as 17 and the cable 13 is arranged at the outermost end, it is easy to perform the connecting work.

Further, the branch busbars 3 and 4 of the conventional example require two types, one having a connection portion with the main busbar in the center and one having it at the end portion. ~twenty three
C, 24A to 24C can be standardized into one type by simply arranging them so that the direction is up, down, left and right, and the manufacturing is easy.

Although the units are arranged on both sides of the main bus in the above embodiment, they may be arranged on one side as shown in FIG. 3, which is advantageous when the width of the installation surface is narrow. is there. In the above embodiment, the first and second main buses 21
Although an example of the arrangement of the double busbars using A to 21C and 22A to 22C is shown, the present invention can be applied to a single busbar. in this case,
For example, in FIG. 1, the first disconnector 5 and the first main bus 21A-21C.
And the first branch busbars 23A to 23C may be omitted.

[0021]

As described above, in the gas-insulated switchgear of the present invention, the main bus bar of two phases is arranged on one side of the surface on which the branch bus bar is arranged, and the remaining one phase is arranged on the other side. Since the main busbars of the main busbars are arranged, the space for arranging the main busbars in the width direction can be made smaller, which allows the length of the branch busbars to be shortened. Therefore, the overall size can be made smaller and the installation area can be sufficiently reduced. As a result, there is an effect such that the economical efficiency can be improved. Further, since the shape of the branch busbars can be made common, there is an effect that productivity is improved and thereby economic efficiency is improved.

[Brief description of drawings]

FIG. 1 is a side view showing a partial cross section of a gas insulated switchgear according to an embodiment of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a side view showing an example of a conventional gas-insulated switchgear in a partial cross section.

[Explanation of symbols]

 21A-21C First Main Bus 22A-22C Second Main Bus 23A-23C First Branch Bus 24A-24C Second Branch Bus

Claims (1)

[Scope of utility model registration request] 1. A three-phase separated main busbar and a three-phase main busbar arranged side by side in the same plane, connected to the main busbar for each phase, and extending in a direction intersecting with the main busbar. In a gas-insulated switchgear provided with a branch busbar, a two-phase main busbar is arranged on one side of a surface on which the branch busbar is arranged, and a remaining one-phase main busbar is arranged on the other side. A gas-insulated switchgear characterized in that