JPS6231306A - Compound type gas insulated switchgear - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention 1] The present invention relates to a composite gas insulated switchgear capable of reducing the installation area and improving seismic performance.

[Technical background of the invention and its problems] In recent substations, an insulating gas such as SFa gas is filled in a sealed container brought to ground potential, and a breaker or disconnector is placed in this insulating gas atmosphere. A composite gas insulated switchgear (hereinafter referred to as H-GIS), which houses a ground switch, a grounding switch, etc., is widely used.

In addition, the technological progress of H-GIS has been remarkable, especially in circuit breakers with a rated voltage of 300K.
With V and a rated cutoff current of 50 KA, there has been significant technological progress in the number of cutoff points from two to one, and H-GIS has also become more compact as a result of this. However, in equipment other than circuit breakers, the rate of downsizing is small;
Furthermore, the dimensions are also larger, as the separation distance for the popular insulation remains the same.

Showing conventional composite gas insulated switchgear? + In FIG. 5, disconnector containers 2 and 3 incorporating a disconnector and a grounding switch are attached to both ends of the breaker container, and a bushing 7 is further attached to the disconnector container 2. H- like this
In G[S, the maintenance space of the circuit breaker l
If the minimum separation distance A between the bushings is ensured while ensuring the distances c, 1d < Fig. 6), the overall length of the H-GIS becomes longer, which cancels out the advantage of making the breaker smaller.

In addition, in order to shorten the overall length, if the disconnector containers 2 and 3 are attached to the upper part of the breaker container 1 as shown in Fig. 7, and the bushing 7 is further removed on top of them, the height Hl of the center of gravity G1 will be reduced. This increases the height, resulting in poor seismic performance, and to compensate for this, it is necessary to install, for example, an auxiliary frame. Additionally, operating disconnectors and grounding switches is dangerous because they are located at high places. To improve this situation, measures such as installing safety fences will be necessary.

H-G of the conventional configuration shown in FIGS. 5 to 7 as shown in
With IS, it is necessary to increase the overall length, increase the installation area, raise the center of gravity, and install auxiliary frames and safety fences. Therefore, there are disadvantages that offset the advantages of equipment miniaturization due to technological advances and lead to an increase in the price and construction cost of GIS.

[Object of the Invention] An object of the present invention is to provide a composite gas-insulated switchgear that has a reduced installation area, a low center of gravity, and is inexpensive by efficiently arranging component equipment.

[Summary of the Invention] The composite gas insulated switchgear according to the present invention has a disconnecting unit housed inside and filled with an insulating gas, and a disconnector earthing switch housed at both ends of a 15-year disconnector container. A device configured by connecting disconnector containers filled with gas and further attaching bushings to each of the disconnector containers, wherein the disconnector container is arranged horizontally and the disconnector container is arranged approximately vertically,
The breaker container and the disconnector container are connected horizontally to the ground, and the axis connecting the two bushing shafts is parallel to the breaker container, and the bushing is connected at a certain angle from perpendicular to the ground. It is characterized by being tilted and placed.

[Embodiments of the Invention] The present invention will be described below with reference to the drawings with respect to embodiments shown in FIGS. 1, 2, and 3. In FIG. 1, disconnector containers 2 and 3 incorporating a disconnector earthing switch are connected to both ends of a breaker container 1, and the disconnector containers 2 and 3 are configured to be perpendicular to the breaker container 1. has been done.

A bushing 7 is attached to each of the disconnector containers 2゜3.
I'm getting 1 digit. The axis xx of this bushing 7 is inclined at a constant angle with respect to the vertical Y-Y.

In the H-GIS configured as described above, the height of the center of gravity G1 is reduced because the breaker container 1 is connected horizontally and the disconnector containers 2 and 3 are connected approximately parallel to the ground. In addition, since the disconnector containers 2 and 3 occupy a space that is almost the same as the full length LO of the breaker container 1, the installation (-
1 area can be significantly reduced, and it goes without saying that the inclination of the bushing 7 also ensures the minimum interspinal distance 111A.

Furthermore, by supporting the bushing with the disconnector containers 2 and 3, which have a slightly larger diameter than the normal nozzle diameter, the strength and rigidity of the container can be used directly to support the bushing. Excellent seismic performance can be obtained without installing a frame.

In the above HGIS, the bushing 7 is connected to the disconnector container 2.
, 3, by tilting the axis X-X at a certain angle with respect to the vertical Y-Y, we can take advantage of the advantages of each component being downsized, have a low center of gravity, a small installation area, and Drawing becomes cheaper.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and even if the present invention is configured as follows, the object and effect will be the same. First, as shown in Fig. 2, the disconnector containers 2 and 3 are tilted at a fixed angle θ2 from the vertical, and the bushing 7 is placed on the axis of the disconnector containers 2 and 3 to ensure a minimum separation distance of 1Δ in the atmosphere. do. Therefore, the effects of reducing the installation area and lowering the center of gravity are exactly the same. Further, as shown in FIG. 3, the effect is the same even if only one bushing is tilted V to ensure the minimum separation distance A.

[Effects of the Invention] As explained above, according to the present invention, the bushing is arranged to be inclined from the vertical, and the axes of the breaker container and the breaker container connected to both ends of the breaker are made substantially orthogonal, and the bushing is To provide an LN9 type gas insulated switchgear with a small installation area, low center of gravity, and low cost by directing the bushing with the container and configuring the axes of the breaker container and the two breaker containers to be parallel. It is in.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram showing one embodiment of a composite gas insulated switch according to the present invention, FIGS. 2 and 3 are schematic diagrams showing other different embodiments of the present invention, and FIG. The figure is a single line diagram of a composite type gas insulated switch, Figure 5 is a configuration diagram showing a conventional composite type gas insulated switch, Figure 6 is a plan view of Figure 5, and Figure 7 is a different conventional composite type. FIG. 2 is a configuration diagram showing a gas insulated switch. 1... Breaker container 2.3... Disconnector container 4.5... Current transformer 6... Connection busbar 7... Bushing 8.9... Auxiliary frame (8733) Agent Patent attorney Yoshiaki Inomata (and 1 others)
Name) 'M1 Figure Whistle '1) Ivl Figure 3 Figure 4 Figure 5 Figure 6 Figure 7

Claims (4)

[Claims] (1) A disconnector container, which houses a disconnector earthing switch inside and is filled with insulating gas, is connected to both ends of a breaker container which houses a breaker part inside and is filled with insulating gas, and further In the structure in which a bushing is attached to each of the containers, the breaker container is arranged horizontally, the disconnector container is arranged approximately vertically, and the connection between the breaker container and the disconnector container is made horizontally with respect to the ground. A composite gas insulated switchgear, further characterized in that an axis connecting the two bushing shafts is parallel to the breaker container, and the bushing is mounted at a certain angle from perpendicular to the ground. (2) The longitudinal axis of the disconnector container connected to both sides of the breaker container and the longitudinal axis of the bushing are configured to be substantially in a straight line, and the axes of the disconnector container and the bushing are inclined at a constant angle with respect to the vertical. A composite gas insulated switchgear according to claim 1, characterized in that: (3) Claim 1 characterized in that the inclinations of the bushings are arranged to be line symmetrical with respect to a vertical line.
Composite gas insulated switchgear as described in . (4) The composite gas insulated switchgear according to claim 2, characterized in that the bushings and the disconnector container are configured so that their axis lines are symmetrical with respect to a vertical line.