JPS5815409A - Gas insulated switching device - 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] The present invention relates to a double bus type gas insulated switchgear.

Generally, in high-voltage, large-capacity gas-insulated switchgear, a method is adopted in which the circuit breaker is placed horizontally. It has been proposed that the main bus bar connected to one end of the circuit breaker be located at various locations. However, in the case of a conventional main busbar of a phase-separated double busbar system, a total of six busbars for each phase are arranged either horizontally or vertically. 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 breaker and the direction in which the main busbars are juxtaposed are the same, a somewhat large installation area is required in the same direction.

In the present invention, double main buses are arranged in upper and lower stages, and one end of a breaker is connected to a connecting main bus that connects both main buses. In a preferred embodiment of the invention, the upper main busbar does not require a rigid cradle.

The present invention will be explained below with reference to the drawings.

FIG. 1 is an example in which the main bus bar is of a phase-separated type.

In the horizontally arranged circuit breaker 1, both terminals of a circuit breaker 2 formed therein are led out linearly through insulating spaces 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 connected to a vertical conductor 8 via a horizontal conductor 7.

Both conductors are insulated and supported within the container 9 to constitute a connecting conductor 10. A hand hole 11 is formed in the container 9 on the axis of the conductor 7, and the conductor 7 is removable.
, 8 can be removed from this hand hole 11. This constitutes a separating device. The conductor 8 is supported at the top and bottom by insulating spacers 12 and 13 via tulip contacts and bolt connections. Insulating spacers 12, 13
constitutes a gas compartment. The conductor 8 is electrically connected to the disconnector 14
, 15 are connected to the stators 16 and 17 of the motor. The disconnector is constructed using the gas spaces of the main busbars 18u and 19u, and the movers 20 and 21 are connected to the conductors 22 and 23 of the main busbars.
It is configured such that it is always in electrical contact with the stators 16 and 17 and separated from the stators 16 and 17.

As can be seen from the figure, the upper main busbars 18u, 18V,
18W is on one horizontal plane, and the lower main bus line 19u,
19V and 19W are on other horizontal planes. The upper and lower parts corresponding to each other are main busbars of the same phase, and are connected by a connection busbar 10, respectively. The three phases correspond to each other vertically, and the main bus bar located on the upper horizontal plane is fixed by the main bus bar on the lower horizontal plane via the connection bus 10, and in the best case, the main bus bar located on the upper horizontal plane is dedicated to the main bus bar on the upper horizontal plane. A stand can be completely eliminated.

The main busbars having such a configuration can be configured as one set as a whole, and in particular, the axial length of the breaker can be reduced.

FIG. 2 shows another embodiment in which the main busbars 18 and 19 are of a three-phase type. In the figure, the opposing parts of both main busbars 18 and 19 are connected by a connection busbar 10, but a vertical cylinder is divided into three parts in the axial direction, with the connection busbar 10 at the center and the disconnectors 14 and 15 at both ends. and the main generatrix 18, 1 through this vertical cylinder.
9 can also be connected in the axial direction.

These embodiments have similar effects to the embodiment of FIG.

FIG. 3 shows another embodiment, in which the axes of the conductor 7 of the connection bus bar 10 and the axis of the breaker 1 are different.

The end of the breaker 1 on the main bus bar side is guided upward and connected to the conductor 7.
It is connected to the. Therefore, the main busbars 18 and 19 are raised and are supported using a frame 25.

In this configuration, the main busbar 18 is positioned above by the pedestal 25, so when inspecting the breaker 2 now, the breaker 2 can be pulled out from the shaft end of the breaker 1. Therefore, it is preferable to provide the legs of the pedestal 25 avoiding the position corresponding to the breaker 1.

FIG. 4 shows yet another embodiment, which can be applied to a main bus having a phase-separated configuration.

In this example, the main busbars of the same phase do not correspond to each other above and below. For example, regarding the u-phase, the main bus bar 18u on the upper horizontal plane is provided closest to the breaker 1, but the main bus bar 19u on the lower horizontal plane is located in the middle. According to such a configuration, the insulating spacers 12 and 13 that gasually separate the two disconnectors 14 and 15 can be arranged vertically, and it is possible to prevent a drop in dielectric strength voltage due to foreign matter accumulated on the insulating spacers. It is possible to further reduce the height. Note that the support of the main bus bar on the upper horizontal plane is the same as in the previous embodiment, and is fixed by the main bus bar on the lower side.

In each of the above embodiments, the main generatrix has one line in the middle of its axial direction.
A pair of insulating spacers is provided to define a defined space for the disconnector.

As explained above, the present invention has double main busbars arranged above and below, and the upper main busbar is fixed to the lower main busbar, thereby simplifying the support mechanism and reducing the gas insulation in the axial direction of the breaker. A switchgear is obtained.

Moreover, since the disconnect switch is configured using the space of the main bus bar, it is desirable from an earthquake-resistant standpoint.

In addition, in order to further reduce the height by taking advantage of the above-mentioned effect, the main busbars of the same phase are arranged in the order of u, V, and W in the upper horizontal plane so that they do not correspond vertically in the lower horizontal plane of the upper horizontal plane.
Since the V, W, and U phases are arranged in this order at the bottom, the insulating spacer can be placed on the horizontal connection bus bar, which prevents the dielectric strength of the insulating spacer from lowering and reduces its height.

As can be seen from the above description, the object of the present invention to provide a gas insulated switchgear with a simplified frame and reduced size in the axial direction of the circuit breaker can be achieved.

[Brief explanation of drawings]

1 to 4 are partially sectional front views of gas insulated switchgear according to different embodiments of the present invention. 1... Breaker, 10... Connection busbar, 14.15.
...Disconnector, 18, 19...Main bus agent attorney Akio Takahashi

Claims (5)

[Claims] 1. In a device in which double main busbars are connected to one terminal of a circuit breaker arranged almost horizontally through a disconnector, the double main busbars are arranged vertically and The gas-insulated switchgear is characterized in that the busbars are connected by a connection busbar, the connection busbar is connected to one terminal of the circuit breaker, and the disconnector is constructed by utilizing the space within the main busbar. Device. 2. In the device described in claim 1, the connection bus bar includes a first conductor extending in line with the breaker, and a line between the upper and lower disconnectors on a line substantially perpendicular to the first conductor. A gas insulated switchgear having a second conductor electrically connecting the first conductor. 3. The gas insulated switchgear according to claim 1, wherein the upper main bus bar is supported and fixed by the lower main bus bar. 4. In a device in which double main busbars of a phase-separated configuration are connected to one terminal of a circuit breaker arranged approximately horizontally through a disconnector, the double main busbars are connected to two horizontal planes that are vertically approximately parallel to each other. At the same time, the main busbars of the same phase are staggered so that they do not correspond vertically, and these staggered main busbars are connected by a connection busbar, and this connection busbar is connected to one of the breaker busbars. A gas insulated switchgear connected to a terminal, wherein each of the disconnecting switches is configured using the space within the main bus bar, and the disconnecting switch is gas-wise partitioned only by an insulating spacer provided substantially vertically. . 5. The gas insulated switchgear according to claim 4, wherein the main busbar disposed on the upper horizontal plane is supported and fixed by the main busbar disposed on the lower horizontal plane.