JPH0213522B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a phase-separated double-bus type gas-insulated switchgear.

Generally, in high-voltage, large-capacity gas-insulated switchgear, a method is adopted in which the breaker is placed horizontally. However, in the phase-separated double bus system, a total of six busbars for each phase are arranged horizontally or vertically in the main busbar connected to one end of the breaker. Placing them horizontally is desirable for earthquake resistance because it means placing the heavy and long main busbars close to the installation surface. However, a problem with this type of configuration is that since the axial direction of the shear cutter and the direction in which the main busbars are juxtaposed are the same, a somewhat large installation area is required in the same direction.

SUMMARY OF THE INVENTION An object of the present invention is to provide a gas insulated switchgear in which the size of a horizontally arranged shingle breaker is prevented from increasing in the axial direction.

The present invention suppresses the size of the shaft cutter in the axial direction by arranging the double main busbars in two stages, upper and lower. Further, such a main busbar arrangement requires horizontally arranged insulating spacers, which causes a decrease in insulation performance. Therefore, the positions of the main busbars in the same phase were devised to obtain the necessary gas division without using horizontally arranged insulating spacers.

Embodiments of the present invention will be described below with reference to the drawings.

As shown in Figure 1, the shingle disconnector 1 is placed horizontally.
Both terminals of the cutter 2 constructed inside are led out linearly by insulating spacers 3 and 4, respectively. One terminal is connected to insulation lead-out means such as a bushing 6 via a disconnector 5. The other terminal is led out via a horizontal conductor 7.

On the other hand, the main busbar is arranged so as to be divided into two planes above and below the axis of the shear and disconnector 1. The main bus lines 8u, 8v, and 8w of the first group are arranged in the order of u phase, v phase, and w phase, while the main bus line 9 of the second group
u, 9v, 9w are arranged in the order of w phase, u phase, v phase, and the main bus lines 8u, 8v, 8w of the first group
The main bus lines 9u, 9 of the second group are located almost directly below the
v, 9w are arranged.

To explain the u phase in detail, the container 1 of the conductor 7
0 is connected to a first container 13 via a bellows 11 and an insulating spacer 12, and further connected to a second container 15 via an insulating spacer 14. If the inside of both containers 13 and 15 is detailed in FIG. 2, there is a connecting conductor 16 coaxially connected to the conductor 7, and this connecting conductor 16 is
Supported by 4. A fixed contact 17 is provided on the connecting conductor 16 in the first container 13, and a fixed contact 17 is provided on the connecting conductor 16 in the second container 15.
8 is provided. A movable contact 19 facing the fixed contact 17 is electrically connected to a bus conductor 20 and is opened and closed by an operating device 21 . A movable contact 22 facing the fixed contact 18 is electrically connected to a bus conductor 23 and is opened and closed by an operating device 24 .

In this way, by shifting the u-phase double main buses 8u and 9u instead of aligning them vertically, it is possible to separate the gas between the two disconnectors using the vertical insulating spacers 12 and 14. A v-phase consisting of main busbars 8v and 9v is configured with the same structure as this u-phase. The w-phase consists of main busbars 8w and 9w, and a conductor for connection is added between both containers. Therefore, the problem that occurs when horizontal insulating spacers are used, that is, the accumulation of foreign matter on the insulating spacers, which causes a decrease in dielectric strength voltage, is avoided.

Main bus lines 8u, 8v, 8 placed on the upper horizontal plane
w can be supported in various ways. FIG. 3 shows an example, in which the main bus bar 8u is supported and fixed via the main bus bar 9w, and the main bus bar 8v is supported and fixed via the main bus bar 9u. In this way, the main bus bar 8 located on the upper horizontal plane can be supported via the main bus bar 9 located on the lower horizontal plane, and this separation frame etc. can be simplified.

As explained above, in the present invention, the main generatrix line 8 disposed on the first horizontal plane and the main generatrix line 9 disposed on the second horizontal plane are arranged so that they are not in the same phase vertically, e.g. Arranged in order of phase, the lower part is v,
By arranging the W and U phases in this order, and installing an insulating spacer horizontally to create a gas section between the disconnectors, it is possible to prevent the shrinkage from increasing in the axial direction of the disconnector, and to reduce the dielectric strength voltage of the insulating spacer. can be prevented.

[Brief explanation of drawings]

Fig. 1 is a partially sectional front view showing one embodiment of the gas insulated switchgear of the present invention, Fig. 2 is an enlarged view of the main part of Fig. 1, and Fig. 3 is a gas insulated switchgear according to another embodiment of the present invention. FIG. 1...Shiya disconnector, 8u, 8v, 8w, 9u, 9
v, 9w...Main bus bar, 12...Insulating spacer, 1
3... Container, 14... Insulating spacer, 15... Container.

Claims (1)

[Scope of Claims] 1. In a device in which double main busbars having a phase-separated configuration are connected to one terminal of a shield disconnector arranged approximately horizontally via a disconnector, the double main busbars are The disconnectors are placed in two horizontal planes that are vertically parallel to each other, and the same-phase components of both main busbars are staggered so that they do not correspond to each other vertically. A gas insulated switchgear characterized by being divided into two parts. 2. The gas insulated switchgear according to claim 1, wherein the main bus bar disposed on the upper horizontal plane is supported via the main bus bar disposed on the lower horizontal plane.