JP3255080B2 - 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 gas insulated switchgear (hereinafter abbreviated as "GIS").

[0002]

2. Description of the Related Art Conventionally, in order to reduce the size of GIS,
It has been proposed to arrange a circuit breaker horizontally in a GIS, move the circuit breaker in the horizontal direction, and put the circuit breaker in and out of the GIS. This conventional GIS will be described with reference to the drawings. FIG. 1 is a side sectional view showing a configuration of a power receiving unit of the GIS.
FIG. 2 shows a single-wire connection diagram of the power receiving unit.

In FIG. 1, reference numeral 31 denotes a circuit breaker container, 32 denotes a busbar container, 33 denotes a cable head container, 34 denotes an operation panel,
GCB is a circuit breaker, DS is a disconnector, BUS is a bus, ES is a ground switch, LA is an arrester, CHD is a cable head,
CT is a current transformer. Each device in each container 31-33,
The connections are made as shown in the single-line connection diagram of FIG. FIG. 3 is a sectional view showing the structure of the circuit breaker GCB. Circuit breaker GCB
Electrodes 5 and 6 attached to one insulating cylinder 4, arc extinguishing chamber 7 disposed therebetween, fixed contact 8 disposed inside arc extinguishing chamber 7, and contacts and separates from fixed contact 8. It comprises a movable contact 9 and an insulating operating rod 10 for operating the movable contact 9. The circuit breaker GCB is attached to the cover plate 3 with its axial direction being horizontal. The cover plate 3 is detachably attached to the side surface of the container 31. Circuit breaker G
When removing the CB from the container 31, the CB is taken out together with the lid plate 3 in the horizontal direction.

[0004] As shown in FIG. 1, grounding switches ES1 and ES2 for circuit breaker inspection are arranged in a space above the circuit breaker GCB. Since the circuit breaker GCB is attached and detached in the horizontal direction as described above, the arrangement of the devices in the container is rationalized, and the size of the GIS is reduced.

[0005]

In the above-mentioned conventional GIS, the circuit breaker GCB and the earthing switch ES are separately mounted, so that the assembly and adjustment must be performed in the container, which requires a long time for the operation. I was It is difficult to mount the circuit breaker GCB and the earthing switch ES on the same cover plate due to the shape, weight, etc. of the circuit breaker GCB.

SUMMARY OF THE INVENTION It is an object of the present invention to facilitate installation and adjustment of a GIS and to reduce the size of a GIS by mounting a circuit breaker and a grounding switch for circuit breaker inspection on the same cover plate. It is.

[0007]

According to the present invention, in order to achieve the above object, an insulating support of a circuit breaker is provided. Separate from the ground insulating support base to be insulated. The ground insulating support is horizontal, and is detachably attached to the side of the GIS container, and is attached to the lid plate. Thereby, a space is formed on the ground insulating support between the cover plate and the circuit breaker. In this space, fixed contacts are attached to the circuit breaker.
Vignetting, shielding sliding contacts attached <br/> sectional instrument inspection grounding switch is Ri attached taken to the cover plate.

As described above, by mounting the circuit breaker and the earthing switch for inspection thereof on the same cover plate, the assembly and adjustment can be performed outside the container, so that the assembly time can be reduced. In addition, the circuit breaker is divided into an insulating support base between the poles and a ground insulating support base, so that the circuit breaker can be made compact and the GIS container can be reduced in size. Further, by attaching a grounding switch to the cover plate, a wasteful space can be effectively used, and the GIS container can be made smaller.

[0009]

Embodiments of the present invention will be described with reference to the drawings. FIG. 4 is a cross-sectional view illustrating the entire configuration of the power receiving unit. In the figure, 31 is a circuit breaker container, 3
2 is a bus container, 33 is a cable head container, 34 is an operation panel, GCB is a breaker, DS is a disconnector, BUS is a bus, E
S is a grounding switch, ES1 and ES2 are circuit breaker inspection grounding switches, LA is a lightning arrester, CHD is a cable head, and CT is a current transformer. Each device in each of the containers 31 to 33 is connected as shown in the single-line connection diagram of FIG.

FIG. 5 is an enlarged view showing a mounting portion of the circuit breaker. Reference numeral 3 denotes a cover plate detachably attached to the side surface of the circuit breaker container 31, and a circuit breaker G is provided inside the circuit breaker container 31.
The CB is attached, and the case 36 is attached outside.
The circuit breaker GCB includes electrodes 5 and 6 supported by the inter-electrode insulating support 14 and an arc-extinguishing chamber 7 attached to the upper electrode 5.
And a fixed contact 8 disposed in the arc-extinguishing chamber 7, and a movable contact 9 that contacts the lower electrode 6 via a sliding contact 22. These blocking parts are arranged in the vertical direction. The circuit breaker GCB is attached to the cover plate 3 by the ground insulating support 13. The ground insulating support 13 is
The circuit breaker GCB is supported on the side surface of the lower electrode 6 and attached to the cover plate 3 by a cylindrical base arranged in the horizontal direction. In addition,
Although the circuit breaker GCB is shown for only one phase in the figure, circuit breakers for three phases are arranged side by side in this example. Further, in order to reduce the distance between the phases, the electrodes and the insulating support can be made oval or oval.

The movable contact 9 of the circuit breaker GCB is connected to a drive shaft 12 provided on a case 36 via an insulating operating rod 10 and a 90 ° turning link 11. Also, the insulating operation rod 10 is connected to the direction changing link 11 and the drive shaft 12 through the ground insulating support 13. The earthing switches ES1 and ES2 for circuit breaker inspection are arranged above the ground insulating support 13. The fixed contacts 19 and 49 of the earthing switches ES1 and ES2 are mounted and supported on the electrodes 5 and 6 of the circuit breaker GCB. The sliding contacts 17 and 47 are arranged at positions facing the fixed contacts 19 and 49. The sliding contacts 17 and 47 are mounted on the cover plate 3 via an insulating base, and are connected to insulating lead terminals 15 and 45 via connecting conductors 16 and 46. The conventional connection conductor from the earthing switch to the ground is routed inside the container to the lower portion of the container. However, according to the connection conductors 16 and 46 of the present example, this can be shortened.

The movable contacts 18 and 48 of the earthing switches ES1 and ES2 are mounted on a common insulating base 20 and connected to a drive shaft 21 provided on a case 36. The rotation of the drive shaft 21 causes the sliding contacts 17 and 48 to rotate. While making sliding contact with 47, they come into contact with the fixed contacts 19 and 49 and separate therefrom. As described above, the earthing switches ES1 and ES2 for circuit breaker inspection are
Since the circuit breaker is arranged in a space between the cover plate 3 and the circuit breaker GCB which is originally invalid, the space in the circuit breaker container 31 can be effectively used to make the circuit breaker container 31 compact. In addition, since the circuit breaker GCB has the circuit breakers arranged in the vertical direction, the dimensions in the horizontal direction are shorter than those in the conventional example shown in FIG. The diameter of the circuit breaker container 31 can be reduced.

With the above configuration, the circuit breaker G
The CB and its earthing switch ES for inspection can be assembled and adjusted on the cover plate 3 outside the container. The circuit breaker GCB whose assembly adjustment has been completed is inserted into the container 31 from the opening where the cover plate 3 is attached, and the contact portions 41 and 4 are inserted.
In 2, it is connected to a conductor arranged inside the container 31. Then, the cover plate 3 is fixed to the container 31 in this state. This state is shown in FIG. In addition, contact part 4
Arbitrary configurations can be adopted as the configurations 1 and 42. For example, a circular contact, a wedge-shaped contact, or the like can be used.

FIG. 6 is a side sectional view showing a second embodiment of the present invention. In the example of FIG. 6, a disconnecting switch DS, a lightning arrester LA, and a bus B are provided in a circuit breaker container 31 that houses the circuit breaker GCB.
US is stored, and a bus BUS is arranged above the circuit breaker GCB. In addition, the cable head container 3
3 is provided with a cable head CHD. As described above, the G type in which the bus is arranged above the circuit breaker GCB
Even if IS, ground switch ES1, ES for circuit breaker inspection
The work 2 can be simplified since it is sufficient to assemble the GIS after assembling and adjusting outside the container.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a conventional GIS power receiving unit.

FIG. 2 is a single-line connection diagram of a power receiving unit.

FIG. 3 is a sectional view showing details of the structure of the circuit breaker in FIG. 1;

FIG. 4 is a side sectional view of a power receiving unit of a GIS to which the present invention is applied.

FIG. 5 is an enlarged view of the circuit breaker part of FIG. 4;

FIG. 6 is a diagram showing a modification of FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 3 ... Cover plate 5,6 ... Electrode 8 ... Fixed contact 9 ... Movable contact 10 ... Insulating operation rod 11 ... Direction link 12 ... Drive shaft 13 ... Ground insulating support 14 ... Pole insulating support 15,45 ... Insulating drawer Terminal 17, 47: Sliding contact 18, 48: Movable contact 19, 49 ... Fixed contact 21: Drive shaft 31: Circuit breaker container 32: Busbar container 33: Cable head container GCB: Circuit breaker DS: Disconnector BUS: Busbar ES … Earth switch ES1, ES2… Earth switch for circuit breaker inspection LA… Lightning arrester CHD… Cable head

Claims (1)

(57) [Claims] 1. A cover plate for supporting a circuit breaker detachably attached to a side surface of a container of a gas insulated switchgear, a ground insulating support plate and an inter-electrode insulating support plate, wherein the cover plate is inside the container. And a circuit breaker supported through the ground insulating support base, and the breaker disposed in a space above the ground insulating support base,
The fixed contact is attached to the
A gas insulated switchgear comprising: a circuit breaker inspection grounding switch to which a tact is attached .