JP2773510B2 - Gas insulated switchgear - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal-closed switchgear, and more particularly to a main circuit.

[0002]

2. Description of the Related Art FIGS. 9 and 10 are a skeleton diagram and a sectional view of a conventional high-pressure gas insulated switchgear disclosed in, for example, Japanese Patent Application Laid-Open No. 2-290111. In the figure, 1 is a gas insulated container, 2 is a main bus, 3 is a branch bus, 4 is a switch unit,
5 is a branch conductor, 6 is a bushing for connecting a cable, 7 is a cable connector, and 8 is a unit closed box for storing the above. The switch unit 4 includes a disconnector 4a and a vacuum circuit breaker 4b.

Next, this configuration will be described. The main circuit is a branch bus 3 from a main bus 2 interconnecting the unit enclosures 8.
Each line is constituted by a switch unit 4, a branch conductor 5, and a bushing 6. FIGS. 9 and 10 show an example of four lines, that is, an example in which the switch unit 4 has a four-stage configuration.
Such a multi-stage product is a general configuration of a metal-closed switchgear.

[0004]

As described above, the conventional gas insulated switchgear has a multi-stage configuration of a plurality of unit circuits, so that a large arrangement / wiring space for the branch bus 2, the branch conductor 5 and the like can be obtained. It costs. Further, a plurality of line cables are drawn out of the switch unit 4 and the branch conductor 5 that are horizontally arranged in the depth direction through the bushing 6 and the cable connector 7 in any direction above and below, thereby requiring a space for cable routing. . In addition, in the case of the above-mentioned multi-stage configuration, there is a problem that the maintenance and remodeling of each circuit involves complicated work due to the mixture of other circuit devices. Further, the gas insulating container has a configuration in which the switch units 4 of a multi-stage structure are collectively stored, so that the manufacturing cost is large and the cost is high.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to obtain an inexpensive device which can reduce the wiring length and wiring space of a bus, facilitate maintenance and replacement, and the like. With the goal.

[0006]

According to the gas insulated switchgear of the present invention, a gas insulated container is formed for each unit circuit, that is, for each combination of a switch and a branch conductor bushing, and the bus is vertically symmetrical. And the bushing is provided in the vertical direction.

[0007]

The gas insulated switchgear according to the present invention has a gas insulated container for each unit circuit, is inexpensive, has the shortest busbar wiring, the busbars are arranged vertically, and the bushing is in the vertical direction. In this case, both upper and lower cables can be easily wired. Further, when the extension of the unit circuit is changed, the operation is facilitated because the tank (container) is configured for each unit circuit.

[0008]

[Embodiment 1] An embodiment of the present invention will be described below with reference to the drawings. 1 and 2 are cross-sectional views showing the device,
The skeleton diagram is shown. FIG. 3 is a sectional view taken along the line AA of FIG. FIG. 4 is a configuration diagram showing only the disconnector 4a viewed in the direction of arrows AA. In the figure, 9 is a bushing mounted in a vertical direction, 10 is a bus bar arranged in a vertically symmetrical position, 11 is an insulating support of the bus bar 10 and fixed contacts of the disconnector 4a, and 12 is a unit for accommodating unit circuit devices. It is a gas insulated container container. 5 and 6
Fig. 3 shows an arrangement diagram and a skeleton diagram of the bus bar 10 and the bushing 9 when four such devices are juxtaposed. In the figure, reference numeral 13 denotes a cable, and 14 denotes a lid plate of a container at four ends.

In the gas insulated switchgear configured as described above, the bushing 9 and the vacuum circuit breaker 4 are used as unit circuits.
b, the disconnector 4a and the bus 10 are integrally formed in the gas insulating container 12, and the fixed terminal side of the vacuum circuit breaker 4b is directly connected to the conductor of the bushing 9, and the fixed terminal of the disconnector 4a is directly connected to the bus 10. Since the structure is supported by the insulating support 11, the wiring of the branch bus 3, the branch conductor 5, and the like described in the related art can be omitted between the devices.

Further, by constituting the gas insulated container 12 with one unit circuit, a small and inexpensive container structure can be obtained.

The bus bar 10 is disposed at a substantially central position in the vertical direction with respect to the container 12, and a cable 13
As the drawing direction is upward or downward, wiring work can be easily performed, and the position of the bushing 9 installed in the vertical direction as shown in FIGS. 5 and 6 can be set up or down. It is possible to

In addition, when adding or changing the unit circuit, it is only necessary to attach and detach the container 12 for each unit, which facilitates the operation.

Embodiment 2 FIG. In the above embodiment, as shown in FIG. 7, the configuration is made inside the unit closed box 8. However, as shown in FIG. 8, the containers 12 constituting each unit circuit are juxtaposed and attached to, for example, a wall surface. This can be applied to uses where space can be used effectively.

Embodiment 3 FIG. Further, in the above embodiment, an example in which the bushing is taken out in the vertical direction has been described, but this depends on the situation of the installation location. It has the same effect as the example.

[0015]

As described above, according to the present invention, since each unit circuit is constituted by a compact gas-insulated container, it is inexpensive and compact, and the bushing is mounted in the vertical direction and the bus bar is positioned vertically. By doing so, there is an effect that it is possible to cope with any vertical pull-out direction of the cable and to reduce the cable space.

[Brief description of the drawings]

FIG. 1 is a sectional view of a gas insulated switchgear according to an embodiment of the present invention.

FIG. 2 is a skeleton diagram of a gas-insulated switchgear according to one embodiment of the present invention.

FIG. 3 is a sectional view of the present invention as viewed in the direction of arrows AA in FIG. 1;

FIG. 4 is a side view of the disconnector of the present invention viewed in the direction of arrows AA in FIG. 1;

FIG. 5 is a configuration diagram when four gas insulated switchgears according to one embodiment of the present invention are connected.

FIG. 6 is a skeleton diagram when four gas-insulated switchgears according to one embodiment of the present invention are connected in series.

FIG. 7 shows a gas-insulated switchgear 4 according to an embodiment of the present invention.
It is a conceptual diagram which stored the series in the closing board.

FIG. 8 is a perspective view when the gas insulated switchgear according to one embodiment of the present invention is mounted on a wall surface.

FIG. 9 is a skeleton diagram of a conventional gas-insulated switchgear.

FIG. 10 is a side sectional view of the gas insulated switchgear according to the example of FIG. 9;

[Explanation of symbols]

 9 Bushing 10 Busbar 11 Insulated support 12 Container 4a Disconnector 4b Vacuum circuit breaker 13 Cable 14 Lid plate

Continuation of the front page (56) References JP-A-63-194509 (JP, A) JP-A-60-20706 (JP, A) JP-A-58-124013 (JP, U) (58) Fields investigated (Int) .Cl. ⁶ , DB name) H02B 13/00-13/06

Claims (1)

(57) [Claims] 1. A bushing for connecting a cable, a high-voltage circuit breaker, a disconnector, and a bus are arranged in a gas insulating container on a unit vertical surface. A gas-insulated switchgear characterized in that the direction is either vertical or vertical.