JPH02266806A - Compressed-gas-insulated switchgear - Google Patents

Abstract

PURPOSE:To keep dielectric strength performance of high quality and to reduce a space for checking by perpendicularly arranging insulating spacer connected to plural lead wire terminal sections connected to main bus bars. CONSTITUTION:A conducting conductor 36b rises perpendicularly, to whose terminal at the top an earthing device 39 is arranged. Main bus bars 42a and 42b are respectively connected to a leftlead wire terminal section 40a of a branch bus container 40 through a disconnector 41a and to its right lead wire terminal section 40b through a disconnector 41b. In this connection, the disconnector 41b and the main bus bar 42b as well as the disconnector 41a and the main bus bar 42a are integrally constituted respectively. On the other hand, a cable head 44, the leader device, is connected to a lead wire terminal section 32b through a disconnector 43. Beside this cable head 44 an instrument transformer 45 is connected. Further, the lead wire terminal section 32b, the disconnector 43, the cable head 44 and the instrument transformer 45 are rectilinearly arranged. All insulating spacers 46a, 46b, 46c and 46d can thereby be arranged perpendicularly.

Description

[Detailed Description of the Invention] [Objective of the Invention] (Industrial Application Field) The present invention provides a metal capsule coated with a high pressure gas and insulated with a high pressure gas.
TECHNICAL FIELD The present invention relates to a single-phase or multi-phase high-voltage switchgear, which gas-insulated switchgear is provided with mutually adjacent pressure vessels separated in a gas-tight manner for receiving a high-voltage switch and other current-carrying members.

(Prior art) In substations and switchyards installed around large cities or coastal areas, for reasons such as land acquisition and salt damage countermeasures,
Gas-insulated switchgear is used in which electrical equipment constituting a substation or switchyard is sealed with an insulating medium such as SF or gas that has excellent insulation and arc-extinguishing properties. In this type of gas insulated switchgear, circuit breakers, disconnectors, and other necessary equipment are housed in the same tank, making them complex, thereby significantly reducing the site area. Further, substations near large cities are often installed indoors or underground due to reasons such as rising land prices. Under these circumstances, three-phase combined gas-insulated electrical equipment that houses three-phase circuit breakers, internal current transformers, etc. in one tank has been put into practical use, and is useful for downsizing gas-insulated substations. It is being

What is the configuration of such a conventional gas insulated switchgear?

It is known from Japanese Patent Application Laid-Open No. 54-86738. In other words, the breaker container is arranged horizontally, and the breaker, current transformer, grounding device, current-carrying conductor, etc. are housed in this container, and the main bus is connected to the outlet terminal container at the top of the breaker container. A container with a disconnector and a disconnector is attached via an insulating spacer, and a cable head container is connected to the side of the breaker container via an insulating spacer, and a voltage transformer container is attached to the top of the cable head container via an insulating spacer. The structure is such that it can be attached via the

The gas insulated switchgear configured in this manner is intended to be made smaller by combining the devices. However, in such a configuration, the two outlet terminal containers and the insulating spacers of the potential transformer container above the circuit breaker are oriented horizontally. Therefore, all of the dust generated during the assembly of the disconnector integrated with the main bus bar and the needle-shaped dust generated by the operation of the disconnector fall onto the insulating spacer, which tends to significantly reduce its insulation performance. Similarly, the insulating spacers that separate the instrument transformer case are also horizontal, so
The same thing can be said.

Furthermore, when inspecting and removing the busbar-side disconnector that is directly connected to the outlet terminal container, it is necessary to provide a large inspection space in the height direction in order to lift the circuit breaker container vertically. Sometimes, the disadvantage is that the cost of constructing a house, etc. increases.

(Problem to be Solved by the Invention) In this way, in the conventional multi-bus type gas insulated switchgear, in order to achieve a 74% shape and reduction in size, the insulating spacers of the two outlet terminal containers are moved horizontally. Because each disconnector is connected to this outlet terminal toward the outside, dust and other substances may fall and adhere to the surface of the insulating spacer.
The insulation performance was poor, and the insulating spacer had to be made larger6.The purpose of the present invention is to improve the connection of the circuit breaker, thereby creating a multi-bus system that has excellent workability and has a circuit breaker with a small container. gas insulated switchgear.

[Structure of the invention]

(Means for Solving the Problems) A gas insulated switchgear according to the present invention vertically arranges insulating spacers connected to a plurality of lead terminals connected to a main bus bar.
The branch busbar and grounding device are separated from the circuit breaker container, busbar circuit breakers are installed on both horizontal sides of the container in which the branch busbar and grounding device are delivered, and the circuit breakers are placed inside the circuit breaker unit on both sides of the disconnection section and the disconnection section. 6 (Function) In the present invention, all insulating spacers are free from accumulation of dust generated during assembly and needle-shaped dust generated by disconnector operation. Because there are no holes, it is possible to maintain high-quality insulation performance, and because the disconnector integrated with the bus bar can be pulled out horizontally, there is no need to take up inspection space in the height direction, reducing inspection space. can be achieved.

(Example) The present invention will be described below with reference to FIGS. 1, 2, 3, and 4. First, in Figure 1.

The circuit breaker 31 has a circuit breaker 33 housed in a container 32 filled with an insulating gas such as SF or gas in the axial direction of the container, with the container shaft arranged horizontally, and an operating device for the circuit breaker 33 at the left end. 34 is mounted, and the container 32 is fixed via an auxiliary bench 35. This container 32 has two outlet terminal parts 32a, 3.
2b is provided. One outlet terminal portion 32a is provided vertically near the operating device 34 of the container 32, and the other outlet terminal portion 32b is provided approximately at the center of the axis of the container 32.

A current-carrying conductor 36a is connected to the right side of the cutoff part 33, which is drawn out toward the outlet terminal part 32b substantially parallel to the axis of the container 32. The current-carrying conductor 36a branches near the terminal portion 32b, and a grounding device 37 is connected substantially perpendicularly to the axis of the container 32. On the left side of the blocking part 33, there is a current-carrying conductor that initially extends substantially parallel to the axis of the container 32, breaks near the outlet terminal part 32a, and is pulled out almost perpendicularly to the axis of the container 32 toward the outlet terminal part 32b. Connect 36b.

That is, the current-carrying conductor 36b is bent into an L-shape.

Furthermore, current transformers 37b are interposed between the branching point of the current-carrying conductor 36a and the cut-off portion 33, respectively, at portions of the current-carrying conductor 36b that are substantially perpendicular to the axis of the container 32.

Further, a branch busbar container 40 that houses the branch busbar 38 and the grounding device 39 is arranged in the outlet terminal portion 32a.

The branch busbar container 40 is connected to the outlet terminal portion 32a at the bottom and is substantially parallel to the axis of the container 32.

That is, the container 40 has a T-shape. Current-carrying conductor 36b
stands vertically, and a grounding device 39 is disposed at the upper terminal. A disconnector 41a is connected to the left outlet terminal portion 40a of the container 40, and a main bus 42b is connected to the right outlet terminal portion 40b via a disconnector 41b. still,
In this embodiment, the disconnector 41a and the main bus 42a and the disconnector 41b and the main bus 42b are each integrally constructed.

On the other hand, a cable head 44, which is a pull-out device, is connected to the outlet terminal portion 32b via a disconnector 43. Furthermore, an instrument transformer 45 is connected to the side of this cable head 44. Further, the outlet terminal portion 32b, the disconnector 43, the cable pen 44, and the instrument transformer 45 are arranged linearly.

When each device is configured in this way, all the insulating spacers 46a, 46b, 46c, and 46d can be arranged vertically.

As described above, according to the embodiments of the present invention, the following effects can be obtained.

1. All insulation spacers 46a, 46b, 46c
, 46d are arranged vertically, so the main busbar 42a,
Dust generated during the assembly of the disconnectors 41a and 41b integrated with the disconnectors 42b and dust generated by the operation of the disconnectors 41a and 41b do not accumulate on the insulating spacer, so insulation performance does not deteriorate. .

2. As shown in FIG. 2, the main busbars 42a, 42b
Since the disconnectors 41a and 41b integrated with the disconnector 41a and 41b are arranged horizontally, they can be removed horizontally as shown in Figure 2 when inspecting and removing the disconnectors 41a and 41b, thereby increasing the inspection space. There is no need to increase the size in the vertical direction, and when installed indoors or underground, the construction cost of buildings etc. can be reduced.

3. Furthermore, as shown in Fig. 3, the container 32 of the circuit breaker 31 is fixed on the auxiliary base 35 by tightening bolts, etc., so when inspecting or removing the circuit breaker 31, first remove the auxiliary base. By disconnecting the lead terminal portions 32a and 32b of the circuit breaker container 32, the circuit breaker 3
1 from the gas-insulated switchgear without removing other equipment, and does not require a large inspection space.

4. Since the container 32 of the circuit breaker 31 and the container 40 housing the 1-branch bus 38 and the grounding device 39 are separated, the container of the circuit breaker 31 can be reduced, and the container 3 of the circuit breaker 31 can be further reduced.
Since there is no single branch busbar 38 in the container 2, it is easy to provide the current transformer 37b on the busbar side in the container 32 without increasing the size of the container 32.

5. As shown in Fig. 4, this is a gas insulated switchgear unit for busbar communication, but the circuit breaker 31 is similar to Fig. 1.
The container 32 and bus disconnector 41a can be shared, there is no need to increase the number of types of parts, productivity is improved due to standardization, and product quality is stabilized.

6. Since the container 32 and operating device 34 of the circuit breaker 31 are arranged horizontally, the floor load when operating the circuit breaker 31 can be reduced, and construction costs such as foundation work can be reduced. . Finally, each embodiment can be applied to both single-phase and three-phase integrated systems.

〔Effect of the invention〕

As explained above, in the present invention, all the insulating spacers between the plurality of lead terminals connected to the main bus bar and the circuit breaker container are arranged vertically, so that the operation of the disconnector, etc. Since dust and the like do not accumulate on the insulating spacer, the insulation performance does not deteriorate. Furthermore, because the breaker container is separated into a container that houses the current transformer and grounding device, and a container that stores the branch bus and grounding device, the breaker container can be made smaller, and current transformers are installed on both sides of the breaker. I was able to do that.

In addition, since the busbar disconnect switch is placed horizontally, it can be tripped horizontally when inspecting and removing the disconnect switch, so there is no need to increase the inspection space in the height direction, and the disconnect switch can be placed below the circuit breaker container. Since a removable auxiliary base is provided, when inspecting and removing the circuit breaker, it can be removed from the gas insulated switchgear without removing other equipment, and has the advantage of not requiring a large inspection space.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram showing one embodiment of the gas insulated switchgear of the present invention, and FIGS. 2 and 3 are schematic diagrams illustrating 111 when the bus disconnector and circuit breaker unit of the present invention are removed. 4 is a schematic configuration diagram showing a GIS of a busbar communication unit as another embodiment of the present invention. 31... Circuit breaker 32... Circuit breaker container 33... Breaking part 34... Operating device 3
5...Auxiliary base 36a, 36b...
・Normal conductor 37.39...Grounding device 38...
・Branch busbar 40...Branch busbar container 41a, 4
1b...Disconnector 42a, 42b-Dotan$4
3-... Disconnector 44... Cable head 45.
...Instrument transformers 46a, 46b, 46c, 46d.=
Insulating spacer agent Patent attorney Nori Chika Ken Yudo Daishimaru Kendai

Claims (1)

[Claims] A circuit breaker unit configured by housing a circuit breaker, a bus disconnector on both sides, and a grounding device in a circuit breaker container installed horizontally, and an outlet terminal protruding from the top of the circuit breaker container of this circuit breaker unit. A branch busbar container connected to the container and having a branch busbar and a grounding device built therein, a main busbar and disconnector connected to both sides of the branch busbar container via vertical insulating spacers, and a circuit breaker of the circuit breaker unit. A gas insulated switchgear comprising a disconnector and a cable head connected to a line side outlet terminal container of the container via a vertical insulating spacer.