JPS59123410A - 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 a gas-insulated switchgear constructed by housing a circuit breaker, a disconnector, a grounding switch, etc. in a cubicle filled with relatively low-pressure SF and gas. In particular, the present invention relates to a gas-insulated switchgear that is compact, simplified, and easy to maintain and inspect due to its rational configuration.

[Background technology of the invention and its problems]

The general structure of conventional gas-insulated switchgear is to install independent circuit breakers, disconnectors, and grounding switches using insulating gas S at relatively low pressure (0.2 to 11 cg 7 ClrL2).
F is installed in a sealed cubicle, and has a configuration that can be adapted to any circuit wiring diagram, and a metal plate is installed between each device so that even if one device breaks down, the problem will not spread to other devices. It is composed of partitions, etc. The breaker, which is the largest and most important element in such a gas-insulated switchgear, is required to be disassembled and inspected.
It is considered that it must necessarily be independent and separated from other devices. On the other hand, such a combination configuration of independent devices reaches a limit in further downsizing the device, making it difficult to rationalize the device as a whole. Currently, the breaker's breaker is difficult to inspect due to its complicated structure, such as the method of removing the mechanism and rotating the breaker to a position where it can be inspected. be.

[Purpose of the invention]

The present invention takes advantage of the combination configuration of independent devices, and
The purpose of this invention is to provide a gas insulated switchgear that can streamline the entire device, reduce the size of the device, and facilitate inspection of the circuit breaker.

[Summary of the invention]

In order to achieve all of the above objects, according to the present invention, the gas inside the cubicle is divided into a breaker chamber and a disconnector chamber by a partition plate, the breaker and the disconnector operating device are both disposed on the breaker chamber side, and the disconnector The movable electrode of the disconnector passes through the partition plate in an airtight manner and is supported by the connection stand of the disconnector, thereby simplifying the support structure for the movable part of the disconnector. It also makes it easier to inspect the equipment.

[Basic example]

The present invention will be described below with reference to an embodiment shown in FIGS. 1 to 3. No. 11 is a single-phase wiring diagram, 1.2 is a disconnector, 3 is a breaker, 4, 5 (rJ earthing switch). It is a -r side view of the circuit breaker surrounding of an insulated switchgear.FIG. 3 is a sectional view seen from the top.

Among these, the main breaker 3 is as follows. A pedestal 7 housing an operating mechanism 6 is provided at the lower part of the bottom plate C) of the cubicle C, and a supporting insulating cylinder 8 is established inside the cubicle C on the pedestal 7. An upper insulating tube 10 is established further upward via a connection stand 9 provided at the upper end of the insulating tube 8,
An upper connection stand 11 is attached to its upper end. Then, the breaker 13 is installed inside the upper insulating cylinder 10. Upper connection stand 1
1 supports a fixed electrode 12.

A movable electrode 14 arranged opposite to the fixed electrode 12 so as to be able to come into contact with and separate from the fixed electrode 12 is connected to an insulating rod 1 that penetrates the connection base 9 and is arranged in the supporting insulating cylinder 8.
5 and a lever 16 disposed within the frame z, it is connected to an operating mechanism 6 and driven to open and close. The periphery of the breaker 3 in the cubicle C is surrounded by the front plate 17, the upper plate 18, the partition plate 19, the side plate 2θ, and the bottom plate C1, and is assembled on the pedestal 7, and the inside is sealed and filled with low pressure gas. ing.

On the other hand, the disconnector 1.2 is constructed as follows.

Two disconnectors 1.
Place 2. These disconnectors l and 2 are connected to the respective fixed contacts 2
1a and 21b are installed in the cubicle C via support insulators 22a and 2Zb. and movable electrode 2.9a
, 23b is a bushing 24a fixed to the partition plate 19
, 24b are penetrated to look into the breaker 3 chamber, and are extended to the - side of the upper connection stand 11 and lower connection stand 9 of the breaker 3. Here, connection tables 1 and 9 and movable electrodes 23a and 23
b is electrically connected. This movable electrode 2.3a
, 2,? As shown in FIG. 3, a rack gear 25 is provided at the right end of b as shown in FIG. 3, and is coupled to a binion 26. This pinion 26 is connected to a lower electric gear 28 via an insulated operating rod 27, as shown in FIG. The disconnector 1.2 is opened and closed by rotating the electric motor 28 in forward and reverse directions.

Note that a sealing device 29 is attached to the sliding portion between the bushings 24a, 24b and the i'iJ electrodes 23a, 23b which pass through the bushings. Therefore, the dregs of the breaker l, 2 chamber and the breaker 3 chamber are separated from each other'J
It is made of F'A.

Grounding switch '7''; Bs is above breaker 3, T connection block 1
1 and 9 and the upper and lower grounding contacts 3θa and 3θb that can be reached on the front plate 17.
．． When 2 is completely opened, the movable contact rod of disconnector 1.2 will automatically open. ,? a, 2. ? The right end of b is the grounding contact s
It has a structure in which it is connected to oa and 3ob, and both poles of the breaker 30 are grounded.

In addition, disconnector 1.2 movable electrode 23a, , 11.9
The center of the circuit breaker 3 is made eccentric to the center of the circuit breaker 3 so that the operating rods of both devices do not cross each other, so that the contact point can be exchanged from the top of the circuit breaker 3.

When inspecting the breaker, open the breaker 3 and open the disconnector 1.2. This will cause the earthing switch 4,
5 closes the circuit, after that (7 and degassing the disconnector 3 chambers 0) then the upper plate 18 or the front plate 17 as necessary.
Open the upper contactor 1 of the circuit breaker 3 to exchange pressure points, etc.

〔Effect of the invention〕

The gas-insulated opening of the present invention as described above has the following effects.

(1) By locating the disconnect switch and the breaker operating device all at once on the breaker side, the device can be made more compact and easier to inspect, and the mechanical interlock between the two devices is also reliable. can.

(2) Since the movable part of the disconnector is integrally supported with the breaker, the movable side support of the disconnector is no longer required, which greatly simplifies the construction, resulting in an inexpensive and compact cass insulation switchgear. 1. Ru.

(3) The disconnector shop and the breaker room are separated, so when inspecting the breaker, you can safely inspect it by turning off the power on the receiving side. is also possible.

[Brief explanation of the drawing]

Fig. 1 is a wiring diagram of a gas insulated switchgear according to an embodiment of the present invention, Fig. 2 is a F'J 1 side view of a gas insulated switchgear according to a specific modification of the wiring diagram of Fig. The figure is a top sectional view of FIG. 2. 1.2... Disconnector, 3... Breaker, 4,5...
Earthing switch, 6... Operating mechanism, 7... Frame, 8...
- Support insulating tube, 9... Lower connection stand, lO... Upper insulating part, 11... Upper connection stand, 12... Fixed electrode, 1
3... Breaking part, 4th... Movable electrode, 15...
Insulation forest, 16... Lever, 17... Front plate, 18.
・Top plate, 19... Partition plate, 20... Side plate, 21a
, 21b... Identification contactor, 22a, 22b... Support insulator, 23a. 23b...Movable electrode, 24a, 24b...Bushing, 25...Rack gear, 26...Binion, 27
...Insulated operating rod, 28...Electric motor, 29...Sealing device, 30a, 30b...Grounding contact 0 Applicant's representative Patent attorney Hikogo Suzue Takeshi 53 Figure No. 2811

Claims (1)

[Scope of Claims] (1) A gas-insulated switchgear in which a circuit breaker is housed in a cubicle, and gas is separated between the circuit breaker and the circuit breaker by a partition plate, the movable electrode of the disconnector is connected to the partition plate. A bushing provided in the breaker is guided into the breaker chamber by passing through it in a gas-tight manner, and is connected to a breaker drive mechanism attached to the breaker main body, so that opening and closing operations of the breaker can be performed from the breaker shop side. A gas insulated switchgear characterized by: (2) A grounding contact is provided on the front plate of the cubicle, and the movable electrode of the disconnector is configured to be connected to the contact in a completely disconnected position. Gas insulated switchgear according to item (1).