JPH0584122B2 - - Google Patents

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a gas insulated switchgear, and more specifically, the present invention has a circuit breaker connected to at least one bus bar through a disconnector, and The device's operating mechanism is located at ground level, and it relates to gas-insulated switchgear installed in electrical stations such as substations.

[Conventional technology]

Conventionally, this type of gas insulated switchgear is described in Japanese Patent Laid-Open No. 183904/1983. In addition, Figures 5 to 7 show conventional gas-insulated switchgear in the catalog A-C7517-A "Mitsubishi all three-phase integrated gas-insulated substation" published by Mitsubishi Electric Corporation in November 1985. The device is shown in the figure, and necessary components such as circuit breaker 1, disconnectors 2 and 3, earthing switches 4 and 5, bus bar 6, cable head 7, transformer 8, and current transformer 9 are each equipped with SF ₆ gas. The metals are each housed in separate metal containers filled with metals, and predetermined metals are bonded to each other via insulating spacers 10. In addition, a monitoring panel 12 and a circuit breaker operating box 11 are installed in parallel on the front of the circuit breaker 1, and the operating devices 13, 14, 1 for each of the disconnectors 2, 3 and the earthing switches 4, 5 are installed in parallel.
5 and 16 are attached directly to the side of each container, and the control cables of each operating device can be routed through the conduit 17.
etc. are collected on the monitoring panel 12. The unit space 18 faces the front and rear inspection passages 23 and 24. The monitoring panel 12 has a monitoring instrument panel 2.
1. A simulated bus bar 22 is provided. 1
9 is an opening/closing display window.

With the above configuration, the movable contacts of the disconnecting switches 2 and 3 and the grounding switches 4 and 5, which can be electrically connected and separated within the metal container and are electrically insulated and connected to the metal container, can be operated. The force is transmitted via a sealed shaft attached to the outer surface of the metal container.

On the other hand, for example, the busbar side disconnector operator 1 shown in FIG.
The operating force of the operating device attached to the side surface of the metal container as in 3 is transmitted to the airtight shaft by a power source or a manual power source. The operating devices 13 to 16 of the disconnectors 2 and 3 and the earthing switches 4 and 5 are provided with a handle insertion slot for manual operation and an opening/closing indicator 19, allowing for the respective status display functions and direct manual operation. It is becoming.

[Problem that the invention seeks to solve]

The conventional gas insulated switchgear as described above has a problem in that the structure is complicated because a large number of containers are combined in a complicated manner, the device is large, and a large amount of installation space is required. In addition, when measuring the contact resistance of circuit breakers, etc. with a megger, when inspecting and replacing contacts such as circuit breakers, disconnectors/grounding switches, etc., inspection scaffolding installed between units is required, and in conjunction with piping and structures. The system had become extremely complex, which was a factor that hindered ease of operation and maintenance. moreover,
In the event of an accident with the equipment, there was a problem in that the time required for emergency recovery or permanent recovery would be prolonged.

This invention was made to solve the above problems, and it simplifies the structure, reduces the installation space, makes maintenance, inspection, and operation easier, and improves safety. The purpose of this research is to obtain a more reliable gas-insulated switchgear that enables emergency recovery response in the minimum amount of time in the event of an accident.

[Means for solving problems]

The gas-insulated switchgear according to the present invention has a circuit breaker connected to at least one bus bar through a disconnector, and the operating mechanism of the circuit breaker is located at ground level and is the same as the opening of the circuit breaker cylindrical container. Grounding switches for circuit breakers are provided on the sides of the cylindrical container above and below the opening and sandwiching at least one disconnector.

[Effect]

In this invention, the grounding switch for inspecting the circuit breaker is attached to the side opening of the circuit breaker case, so inspection and replacement of the contacts of the grounding switch, contact resistance and Megger measurement of the circuit breaker, etc. can be carried out through the front inspection passage. In addition to being easily possible from the side, it does not obstruct the disassembly and assembly of the busbar, and by installing an operating device at ground level and consolidating the monitoring system and operation system, the workability of maintenance, inspection, and operation has been greatly improved. to improve.

〔Example〕

1 to 3 are configuration diagrams of a bus unit and a main unit showing an embodiment in which the present invention is applied to a feeder unit disposed between the bus bar feeder and the bus feeder, and FIGS. A side view and a front view showing an embodiment of the present invention corresponding to the skeleton shown in the figure, and FIG. 3 is a planar arrangement of the operating device unit.

In Figure 4, BS1 and BS2 are the busbars of Figures 1 and 2, respectively, DS11 and DS1.
2 are first and second bus-side disconnectors, respectively;
First busbar BS1 and first bus-side disconnector DS1
1 in a common container, a first busbar unit is formed, and a second busbar unit is formed in the same manner. CB is a circuit breaker, ES11,
ES12 is a grounding switch for the first and second circuit breakers.

In Figures 1 to 3, the main unit 3 is located above the controller unit 30 at ground level.
1, a circuit breaker arc extinguishing chamber 33 and a circuit breaker coupling mechanism 34 are housed in a cylindrical container 32, and the circuit breaker coupling mechanism 34 is connected to the circuit breaker operating device 3 in the operating device unit 30.
It is connected to 5. The first and second busbar units 36a, 36b are respectively coupled to openings 37a, 37b arranged vertically in parallel on the front surface of the cylindrical container 32.
The busbar and busbar-side disconnector are housed in a common container.

First and second circuit breaker inspection earthing switches 38a,
38b corresponds to the fixed side and movable side of the circuit breaker, respectively, and the bus bar unit 36 is attached to the cylindrical container 32.
Mounting openings 3 provided above and below across a and 36b
9a and 39b.

As described above, the skeleton compatible gas insulated switchgear shown in FIG. 4 is constructed. Note that the adjacent similar gas insulated switchgear means the bus unit 36.
a and 36b.

The operating device unit 30 includes a disconnector operating device 4 for each of the first and second busbar units 36a and 36b.
In addition to 0a and 40b, as shown in FIG. 3, a monitoring equipment block 41 and a control wiring block 42 are housed, and a wiring duct 43 is also provided. Connecting mechanisms 44a and 44b are connected to the disconnector operating devices 40a and 40b, respectively.

45 is the grounding switch 3 for checking the first and second circuit breakers.
This is an operating device for 8a and 38b. The circuit breaker inspection earthing switches 38a, 38b are connected to each other behind the busbar units 36a, 36b by a connecting rod 46, and are connected to the operating device 45 by an operating rod 47. To explain this configuration in more detail, the sealing shafts of the earthing switches 38a and 38b, which externally drive the contacts in the gas, are arranged at right angles to the radial direction of the cylindrical container 32 and on substantially the same plane. An operating device 4 in which operating links are rotatably attached to the outer surface of the sealed containers of the earthing switches 38a and 38b, the operating links are connected to each other via an operating rod, and one operating link is provided outside the cylindrical container 32.
5 via an operating rod 47. Further, the connecting rod 46 is provided at a position approximately midway between the main busbar and the circuit breaker, close to the openings 37a, 37b of the cylindrical container 32 of the circuit breaker, which is connected to the busbar via a disconnector.

In addition, the same reference numerals in FIGS. 5 to 7 indicate corresponding parts.

With the above configuration, power operation is possible by direct manual operation or remote control of the operating device unit 30 from the front inspection passage. In addition, the opening/closing status and number of openings/closings can be checked using the operating unit 30 from the front inspection passage.
Visual confirmation is possible using the opening/closing indicator 19 without opening or closing the door.

〔Effect of the invention〕

As is clear from the above explanation, this invention
A cylindrical container of a circuit breaker connected to at least one busbar via a disconnector is arranged above the actuator unit at ground level, an opening formed in the cylindrical container for connecting the busbar and the disconnector. By forming installation openings for the grounding switch for circuit breaker inspection on the top and bottom of the board, the structure is simplified, the installation space can be reduced, and maintenance and inspection operations are easy and safe. This has the effect of improving performance and speeding up recovery in the event of an accident.

[Brief explanation of drawings]

1 to 4 show an embodiment of the present invention,
FIG. 1 is a side view, FIG. 2 is a front view, FIG. 3 is a partial plan view, and FIG. 4 is a skeleton. Figure 5~
7 shows a conventional gas insulated switchgear, FIG. 5 is a side view, FIG. 6 is a front view, and FIG. 7 is a side sectional view. 30...Manipulator unit, 32...Cylindrical container,
36a, 36b...first and second busbar units,
37a, 37b... opening, 38a, 38b...
First and second circuit breaker inspection grounding switches, 39a,
39b...Mounting opening, 40a, 40b...Disconnector switch operator, 45...Controller, 46...Connection rod, 47...Control rod. In each figure, the same reference numerals indicate the same or equivalent parts.

Claims (1)

[Scope of Claims] 1. A gas-insulated switchgear having a circuit breaker connected to at least one bus bar through a disconnector, and in which an operating unit of the circuit breaker is located at ground level, wherein the circuit breaker and the circuit breaker an opening in the cylindrical container of the circuit breaker for connecting the circuit breaker; and mounting openings for grounding switches for circuit breaker inspection, which are formed in the same direction as this opening and above and below the opening. A gas insulated switchgear characterized by comprising: 2. The gas insulated switchgear according to claim 1, wherein the mounting opening for the circuit breaker earthing switch is provided close to the opening for the disconnector. 3 Sealed shafts for externally driving contacts in the gas of a pair of earthing switches for circuit breaker inspection are disposed on substantially the same plane at right angles to the radial direction of the cylindrical container of the circuit breaker, and An operating link is rotatably attached to the outer surface of the sealed container of each earthing switch for use, and is connected to the operating link of each earthing switch via a connecting rod, and one of the operating links is provided outside the cylindrical container. A gas insulated switchgear according to claim 1, which is connected to an operating device via an operating rod. 4. Claim 3, wherein the connecting rod is disposed close to the opening of the cylindrical container of the circuit breaker, which is connected to the busbar via a disconnector at a position approximately midway between the main busbar and the circuit breaker. Gas insulated switchgear as described.