JPH0213521B2 - - Google Patents

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 breaker is placed horizontally. It has been proposed that the main busbar connected to one end of the breaker be placed in 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 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.

The present invention aims to solve this drawback, and its purpose is to provide a gas insulated switchgear which is substantially horizontal and whose disconnector is miniaturized in the axial direction.

In the present invention, double main busbars are arranged in two stages, upper and lower, and one end of a sheath disconnector is connected to a connection busbar that connects both main busbars. 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 shingle breaker 1, both terminals of the shingle breaker 2 formed 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 connected to a vertical conductor 8 via a horizontal conductor 7.
Both conductors are insulated and supported within the container 9 to constitute a connection bus bar 10. A hand hole 11 is formed in the container 9 on the axis of the conductor 7,
The removable conductors 7 and 8 are connected to this hand hole 11.
It can be removed from the This constitutes a separating device. The conductor 8 is connected to insulating spacers 12 and 1 via tube contacts and bolt connections at the top and bottom.
It is supported by 3. The insulating spacers 12, 13 form gas compartments. The conductor 8 is electrically connected to the stators 16, 17 of the disconnectors 14, 15. The disconnector is constructed using the gas space of the main buses 18u and 19u, and the movers 20 and 21
are in constant electrical contact with the conductors 22, 23 of the main bus bar and separated from the stators 16, 17.

As can be seen from the figure, the upper main bus line 18u,
18v, 18w are on one horizontal plane, and the lower main bus lines 19u, 19v, 19w are on the other horizontal plane. The upper and lower parts corresponding to each other are main busbars of the same phase, and are connected to each other by a connection busbar 10. The three phases correspond to each other vertically, and the main busbar arranged on the upper horizontal plane is fixed by the main busbar on the lower horizontal plane via the connecting busbar 10, and in the best case, the main busbar on the upper horizontal plane It is possible to completely eliminate the need for a dedicated stand.

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

FIG. 2 shows another embodiment, in which the main busbars 18, 19
is a three-phase all-in-one type. In the same figure, both main busbars 1
8 and 19 are connected by a connection busbar 10, and a vertical cylinder is divided into three parts in the axial direction, with the connection busbar 10 at the center and disconnectors 14 and 15 at both ends. It is also possible to connect the main busbars 18 and 19 in the axial direction.

These embodiments have similar effects to the embodiment of FIG.

FIG. 3 shows another embodiment, in which the connection bus 1
The axes of the conductor 7 and the breaker 1 are different from each other. The end of the shield breaker 1 on the main bus bar side is guided upward and connected to the conductor 7. Therefore, the main busbars 18 and 19 are raised and are supported using a frame 25.

In this configuration, the main bus bar 18 is located above by the frame 25, so when inspecting the sheath section 2 now, the sheath section 2 is derived from the shaft end of the sheath cutter 1. can do. Therefore, it is preferable to provide the stand 25 at a position that corresponds to the leg edge or the disconnector 1.

As explained above, the present invention arranges double main busbars one above the other, and fixes the upper main busbar to the lower main busbar via the container of the connection busbar, which simplifies the support mechanism and increases the height and A gas insulated switchgear with reduced horizontal dimensions is obtained.

[Brief explanation of drawings]

1 to 3 are partially sectional front views of gas insulated switchgears according to different embodiments of the present invention. 1...Shiya disconnector, 10...Connection bus bar, 14,1
5... Disconnector, 18, 19... Main bus bar.

Claims (1)

[Scope of Claims] 1. Each of the double main busbars is housed in a sealed container filled with an insulating gas, and a disconnector is housed in the sealed container, and each of the main busbars is connected to the main busbar through the disconnector. In a device connected to one terminal of a disconnector placed almost horizontally, main bus containers containing the disconnector and the main bus are arranged above and below, and each of the main buses is connected by a connecting bus. A gas insulated switchgear characterized in that the sealed containers of each of the main busbars are connected by a container that accommodates the connection busbar. 2. In the device according to claim 1, a first conductor extending in a straight line with the above-mentioned disconnector, and a line extending between the upper and lower disconnectors and the above-mentioned first conductor on a line substantially perpendicular to the first conductor A gas insulated switchgear having a second conductor that electrically connects one conductor.