JPS5980108A - 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 [Field of Application of the Invention] The present invention relates to an improvement in a gas insulated switchgear having an IJ disconnector configuration.

[Prior art]

FIG. 1 shows an example of a skeleton of an 11-disconnector configuration.

The main buses 19 and 20 forming a double bus system are connected by three disconnectors 10 and 11 and 12. Disconnector 10
．． 11 is connected to the line 3 via the breaker 2 and the disconnector 1, and the line between the breaker 11 and 12 is connected to the line 4 via the similar breaker 2 and the disconnector 1.

FIG. 2 is a schematic diagram of the main parts of the gas-insulated switchgear using the above-mentioned skeleton. Each disconnector is constructed in a container filled with gas, and each is made into an independent gas compartment by a spacer 8.

The present inventor conducted a detailed study on this type of configuration. In case of an accident or inspection of the disconnector 10, operation can be continued on the main bus 20 via the disconnector 12, and conversely, operation can be continued on the main bus 20 via the disconnector 12.

However, in case of an accident or inspection of the disconnector 11, since both poles of the disconnector 11 are connected to the lines 3 and 4, there is no problem with the accident of the lines 3 and 4, and there is one weak point. It was found that If such an accident were to occur, the operations of lines 3 and 4 would have to be stopped at the same time while the disconnector 11 was being repaired or replaced, resulting in a long-term power outage for the two lines.

[Purpose of the invention]

An object of the present invention is to provide a gas-insulated switchgear that does not stop two lines for a long time even if an accident occurs in a disconnector or inspection is required.

[Summary of the invention]

The present invention configures a disconnection device in the same gas compartment as two disconnectors directly connected to the main bus, and
If an accident occurs with the disconnect switch between the two lines, this disconnect device is opened to cut off the connection between both lines.

Since this disconnection device is located in the gas compartment of a normal disconnector, it can withstand pressure in the gas space created by opening, allowing other normal parts to continue operating.

Therefore, according to the present invention, since operation can be resumed by opening the disconnection device, the power outage time is shortened.

[Embodiments of the invention]

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

Figure 3 is a cross-sectional view of the main part of the gas insulator, and shows the main bus line 19.2.
0, a gas insulation method is adopted.

The main busbars 19, 20 provided near the attachment surface are arranged substantially parallel and both have a three-phase finger shape. An approximately cross-shaped disconnector 10.12 is connected to the upper part of the bidirectional busbar. Disconnector 10
．． 12 includes a movable element that is operated up and down by operating mechanisms 13 and 14 provided above. Opposite openings of both disconnectors 10 and 12 are connected to lines 3 and 4 via insulating spacers Ba and Bb, respectively.

Although not shown, this is done via the circuit breaker 2 shown in FIG. 1, etc. Opposite sides of the two disconnectors 10.12 are connected via a disconnector 11 having a nearly linear configuration, and these three
Insulating spacers 3b, 8c are provided between the disconnectors of the stand, and each disconnector has an independent gas compartment 24, 25.2.
6.

The disconnectors 10 and 12 constitute a disconnection section using a right angle section, whereas the disconnector 11 constitutes a straight disconnection section,
It is operated by the operating mechanism 15. Although the disconnector 11 can have a right-angled section in other embodiments, the illustrated example simplifies the construction. Located in the gas compartment 24.25 of the disconnector 10.12 and upstream of the disconnector 11, a disconnection device 5.6 is constructed. This disconnecting device 5.6 connects conductors facing each other with a predetermined distance from each other by a bridge light conductor, and can remove the bridge light conductor from the hand holes 27 and 28. The predetermined distance obtained by removing the bridge light conductor is an insulation distance that can withstand the voltage applied during operation.

Now, if an accident occurs at disconnector 11, first
0.12 and then the disconnection device 5.6 from the hand hole 27.28 is opened. As a result, the main buses 19, 20 and the lines 3.4 can resume operation, and both sides of the disconnector 11 can be grounded to perform inspection work. Of course, operation of only one line can be restarted by operating the disconnector 10.12. In addition, in the event of a serious accident with the disconnector 11, for example, disconnect the insulating spacers 8b and Bc,
If the opening on the opposite side of the disconnector 10.12 is closed with a blind cover, the operation of the lines 3 and 4 can be resumed in the same way.

Even in this case, since there is a disconnector 5.6, there is no need to dismantle unnecessary parts, and the disconnector 10.12
can be restored in a short period of time.

FIG. 4 shows a gas insulated switchgear according to another embodiment. The main busbars 19 and 20 in this example are air-insulated, and bushings 16 and 17 are used for connection to the main busbars. Therefore, compared to Fig. 3, the main bus bar is located upside down, and the disconnect switch 10.
The two configurations are different. Basically, it is the same as in FIG. 3, and the same components are given the same reference numerals and detailed explanations will be omitted.

The above explanation describes the case where the disconnection devices 5 and 6 are manually separated. However, if the disconnector 11 is inspected, the disconnector 11 can be inspected using the gas compartment 2゜250 Gas recovery etc. are completely unnecessary. Furthermore, if the disconnector 11 is to be removed, it is preferable that the link mechanism of the disconnector 5.6 be constructed on the disconnector 10, 12 side and not on the conductor 29 side.

〔Effect of the invention〕

As described above, the present invention provides gas compartments for two disconnectors directly connected to the main busbar, and before reaching the central disconnector.
Since a disconnection device is provided, the central disconnector can be inspected while being separated from the line by the disconnection device, and at the same time, the time during which two lines are out of power can be shortened.

[Brief explanation of the drawing]

Figure 1 is 1-! - Skeleton of the disconnector configuration, Figure 2 is based on Figure 1.
The figure is a sectional view of a main part of a gas insulated switchgear according to an embodiment of the present invention, and FIG. 4 is a sectional view of a main part of a gas insulated switchgear according to another embodiment of the invention. 5.6... Disconnection device, 10, 11.12... Disconnector, 19.20... Main bus bar, 24, 25.26...
- Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] 1. In a gas insulated switchgear with 11 disconnectors connected between the main busbars by three disconnectors connected in series, each disconnector is configured in an independent gas compartment and is directly connected to the bidirectional busbar. A disconnection device was installed in each of the gas compartments that comprised the two disconnectors to maintain electrical isolation between these two disconnectors and the remaining one. A gas insulated switchgear characterized by: