JPS592516A - 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 [Technical Field of the Invention] The present invention relates to improvements in gas insulated switchgear, and particularly to a gas insulated switchgear that is smaller and less expensive and allows easy inspection of busbars, etc.

[Technical background of the invention and its problems]

Since the well-known gas-insulated switchgear allows the installation space to be significantly reduced compared to the one using atmospheric insulation, the device is used in large numbers in various fields.

By the way, in the case of a double bus system as shown in FIG. 1(a), the structure shown in FIG. 1(b) is generally adopted. In the figure, 1 is the busbar, 2 is the busbar side disconnector, 3 is the circuit breaker, 4 is the lineside disconnector, 5 is the cape head, and 6 is the ground switch. It shows. If a multi-line system is configured with this structure, each line will be arranged in the bus direction (that is, the depth direction of the same figure), so the bus line 1, which has a large dimension in the depth direction, will inevitably become long.

In order to overcome this problem, it has been adopted to place two lines of equipment on both sides of the bus line 1'f: the center, as shown in Figure 2 (a) and (b). According to this, the same bus line is Although the width increases due to the two circuits being shared, the depth dimension is reduced by %, which together with the omission of the bus line, results in significant downsizing and cost reduction.

When the method shown in FIG. 2 is applied to a double busbar as shown in FIG. 3(a) K, the result is as shown in FIG. Here, a case is shown in which the equipment other than bus 1 is configured with the same phase-separated type as shown in Figure 2(b), but in a gas-insulated switchgear in which all equipment is configured as a 3-phase wire type, each Since the unit size of the equipment is large, this configuration is not practical because the depth and height dimensions are excessive.

The busbar length of the devices shown in Figures 2 and 3 is shortened by 1% compared to that of Figure 1, and the equipment can be downsized, but the number of connecting pipes increases, making it extremely difficult to apply it to a double busbar configuration. It is complicated, and furthermore, it is practically impossible to configure all the equipment into a three-phase-talk type.

In addition, in the cases shown in Figures 1 to 3, the busbar 1 is located inside the conduit, so in the event of an accident on the busbar 1, the busbar must be removed unless the breaker 3, disconnectors 2, 4, etc. are removed. There are drawbacks such as the inability to inspect drawers in step 1.

A configuration as shown in FIG. 4 is also known. That is, when the bus bar current is 400OA or more, the bus bar 1 is placed on both sides, and in this case, as the bus bar diameter increases, the weight increases,
The center of gravity will also be higher. Therefore, a bus bar support frame is not required, and as a result, inspection and maintenance space becomes narrow.

[Purpose of the invention]

The present invention has been made in view of the above points, and it is an object of the present invention to provide a gas insulated switchgear which has a simple structure with a double busbar two-circuit system, which has a large effect of reducing size and cost, and also allows easy inspection of busbars, etc. It is something.

[Summary of the invention]

The present invention is characterized in that, in the connection shown in FIG. 4, the bus bar is placed downward for the purpose of facilitating installation work since the seismic resistance and the installation space for the cape are expanded.

[Explanation of Examples]

The following description will be made based on the embodiment shown in FIG.

In the same figure, 41 and 42 are double busbars arranged in parallel in the Z-axis direction, 43 to 45 are bus-side disconnectors connected in series, and of these, the disconnector 44 is especially a section disconnector from the point where the opposing circuits are connected and separated, as will be described later. It is called a vessel. These disconnectors 43 to 45 are arranged in series in a plane different from the plane in which the busbars 41 and 42 are located in a direction perpendicular to the busbars, that is, a linear axis in the Y-axis direction. Of these, the disconnectors 43 and 45 at both ends are connected to the double busbar 41 and 42, respectively, and the disconnectors 43 and 45 are connected to the linear axis through connection pipes 58 and 59 arranged along the linear axis. and are respectively connected to one end of a circuit breaker 48, 49 located on the outside.

The circuit breaker 48.49 is connected to the double bus line 41.42 in the Z-axis direction.
Further, it is disposed in a direction perpendicular to the busbar side disconnectors 43 to 45 in the Y-axis direction, that is, in the X-axis direction.

At the other end of the circuit breaker 48, 49, an abbreviated busbar opening is provided on the side of the busbar side disconnector, and a trackside disconnector 54 is provided at a position different from the axis of the busbar side disconnector in the Y-axis direction. .5
5 are connected in the Y-axis direction, respectively, and a disconnector 54.5 is connected in the Y-axis direction.
Connecting pipes 64 and 65 are connected to 55, and both pipes are arranged opposite to each other.

Furthermore, line grounding switches 56 and 57 are removably provided at one end of each of the line-side disconnectors 54 and 55, respectively. On the other hand, a cable 50.51 or an overhead line for power supply is drawn in and connected to a cable head 52.53 connected to one end of a connecting conduit 64.65. The lead-in line part is configured. 460.51 indicates a transformer.

Therefore, in this embodiment, from the cable 5o, the cable head 52, the connection conduit 64, the line side disconnector 54, the connection conduit 62, the breaker 48, the line conduit 46, the busbar side disconnector 43
One line is composed of the circuits that reach the bus bar 41 via the bus line 41. In addition, from the cape/l151, the cable head 53, the connecting pipe 65, the track side disconnector 55, the connecting pipe 63, the breaker 4
9, connection pipe 47, bus bar 42 via bus bar side disconnector 45
The circuit leading to this constitutes another line.

Both circuits are connected to a bus-side disconnector 43 by placing a circuit breaker on the outside.
45 are connected via a dividing circuit 44, and the lead-in line portions are arranged opposite to each other.

In the above explanation, the case where each device is configured in a three-phase-talk type is described, but it is not necessarily limited to this.
Of course, the same effect can be obtained even if each device is constructed as a phase-separated type.

Of course, it is also possible to supply 1tt from a double bus. Furthermore, there is no problem even if the conduit of the lead-in portion of each line, that is, the cable head, and the adjacent connecting conduit are constructed in a common container.

〔effect〕

According to the present invention as described above, space can be used effectively, unnecessary connecting pipes and spaces can be omitted, the device can be downsized, and an inexpensive device with a simple structure can be obtained.

According to the inventors' calculations, when the present invention is applied and all the equipment is configured in a three-phase-talk type, the size of the device can be reduced to about 80 mm compared to the conventional system shown in Figure 1. . Further, according to other calculations, when the bus bar is configured as a three-phase finger type and the other equipment is configured as a phase-separated type, the size of the device can be reduced to about 65 mm compared to the conventional system shown in FIG.

Note that the configuration shown in FIG. 6 may be adopted in which bus-side disconnectors are disposed in a substantially double-shape above the double busbar.

[Brief explanation of drawings]

Figures 1 (a) (b) to 4 (a) (b) are a single line diagram and a schematic configuration diagram showing the conventional device, and Figure 5 (al
G>) (c) is a single line diagram, a schematic plan view, and a side view showing one embodiment of the present invention, and FIGS. 6(a) and 6(b) are a schematic plan view and side view of another embodiment. 41.42...Double busbar, 43-45...Busbar side disconnector, 46.47.62-67...Connection pipe, 48.
49...breaker, 50.51...cape/l=,
52.53...Cable head, 54.55...Line side disconnector, 56-59...Grounding device, 60.61.
...transformer. (7317) Representative Patent Attorney Noriyuki Chika (and 1 other person) Figure 1 Figure 2 (α) (6) Figure 3 (Illusion (Shun Figure 4 ta> (1) Figure 5 (0L) Figure 5 (Drink) Figure 6 (α)

Claims (3)

[Claims] (1) Double busbars arranged in parallel in two axial directions at intervals,
Three bus-side disconnect switches connected in series on the same plane on the L side of the bus bar and arranged in the Y-axis direction, with those located at both ends connected to the bus bar, respectively, and the outside of the bus-side disconnect switch. Two circuit breakers are arranged in the X-axis direction, and each of the circuit breakers is connected to a busbar-side disconnector whose lower sunrise section is adjacent to the circuit breaker, and the circuit breaker is connected to the north sunrise section of each of the circuit breakers and A track side disconnector is arranged in the Y-axis direction via the abbreviated bus bar on the L side of the busbar side disconnector, and is connected to each of the trackside disconnectors and mutually connected to the Y axis on the L side of the busbar side disconnector.
1. A gas-insulated switchgear characterized by comprising lead wire portions facing each other at positions with different axes in the axial direction. (2) The gas insulated switchgear according to claim 1, characterized in that each part is constructed in a three-phase-channel configuration. (3) The gas insulated switchgear according to claim 1, characterized in that the bus bar is constructed in a three-phase wire type, and the other parts are constructed in a phase-separated type.