JPH027809A - Compressed-gas-insulated switchgear - Google Patents

Abstract

PURPOSE:To facilitate a maintenance and inspection work and to make a device small-sized and inexpensive by constituting an earthing device or a breaker for maintenance and inspection connected to both sides of the cutout section of a breaker so that it can be driven by means of a common operational device. CONSTITUTION:A common operational device 10a and a common operational link mechanism 10b are arranged to earthing devices 4 and 5 for a breaker which can operate both devices 4 and 5 at the same time. Thus, in operating earthing devices 4 and 5 for a breaker connected to both sides of the cutout section of a breaker 3 and disconnectors 2 and 6, they can be operated with each single operational device.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a gas-insulated switchgear in which a disconnector for maintenance and inspection and a grounding device are connected to both sides of the interrupting part of the circuit breaker. It is.

(Prior Art) In recent years, gas-insulated switchgears have been adopted in which a plurality of devices are housed in a single container filled with insulating gas. The general structure of such a gas insulated switchgear will be explained by taking as an example a single bus bar system as shown in the single line diagram of FIG.

That is, as shown in FIG.
A circuit breaker 3 is connected to the circuit breaker 3 via a circuit breaker 3, and a circuit breaker grounding device 4.5 is connected to both sides of the circuit breaker 3, and the circuit breaker 3 is connected to a line connection terminal ( or cable) 8. Further, a line-side grounding device 7 is disposed between the line-side disconnector 6 and the line-connecting terminal 8.

A gas insulated switchgear configured in this way generally has a fourth
They are arranged as shown in the figure and FIG. That is, the fourth
As shown in the figure, of the two outlets provided in the circuit breaker 3, the busbar 1 is connected to one outlet via the grounding device 4 and the bus-side disconnector 2, and the other outlet is is connected to a line-side disconnector 6 via a grounding device 5, and roughly connected to a line-connecting terminal 8 via a line-side grounding device 7.

Furthermore, an operating device 2a for driving the disconnector 2 is provided at the lower part of the busbar side disconnector 2, and the disconnector 2 is configured to be driven by a drive shaft 2b. Roughly speaking, on the upper part of the line-side disconnector 6, there is an operating device 6 for driving the disconnector 6.
a is arranged, and the disconnector 6 is driven by a drive shaft 6b.

Roughly, as shown in FIGS. 4 and 5, the grounding device 4,
Operating devices 4a, 5a, and 7a for driving the corresponding grounding devices are disposed at 5 and 7, respectively, and are configured to be able to operate the corresponding grounding devices via operating link gate structures 4b, 5b, and 7b, respectively. has been done.

(Problems to be Solved by the Invention) However, the conventional gas insulated switchgear having the configuration as described above has the following problems.

In other words, in order to operate all of the busbar side disconnector 2, trackside disconnector 6, and circuit breaker grounding devices @4 and 5 during maintenance and inspection of the circuit breaker, four operating devices are required each time. 2
a, 6a, 4a, and 5a, making maintenance and inspection work extremely complicated.

In addition, in order to operate the operating devices 5a and 6a of the ground Vt station 5 and the track side disconnector 6 connected to the upper outlet of the circuit breaker 3, the fifth As shown in the figure, it is necessary to permanently install an operating floor 9 for workers to work on, and a space for its installation is required.

As a result, the size of the gas insulated switchgear increases, which is not desirable for a gas insulated switchgear in which a reduction in installation space is desired.

The present invention was proposed in order to eliminate the above-mentioned drawbacks, and its purpose is to provide a gas-insulated switchgear that is easy to maintain and inspect, reduces the number of parts, is economical, and enables miniaturization. The goal is to provide equipment.

[Structure of the Invention] (Means for Solving the Problems) The present invention provides a gas-insulated switchgear in which a grounding device and a disconnector for maintenance and inspection are connected to both sides of the interrupting part of the circuit breaker. The grounding device or disconnector connected to both sides of the interrupting section is configured so that it can be driven using a common operating device.

(Function) According to the gas insulated switchgear of the present invention, the grounding device or the disconnector connected to both sides of the interrupting part of the circuit breaker can be driven by a common operating device, so that the operating device to be inspected can be driven by a common operating device. The number of gas insulated switchgear can be reduced, inspection work can be simplified, and the installation space of the gas insulated switchgear can be reduced.

Furthermore, since the number of parts is reduced, costs can also be reduced.

(Example) Hereinafter, an example of the present invention will be specifically described based on FIGS. 1 and 2. Note that the same members as those of the conventional type shown in FIGS. 3 to 5 are given the same reference numerals, and explanations thereof will be omitted.

Configuration of this embodiment* In this embodiment, as shown in FIGS. 1 and 2,
The circuit breaker grounding devices 4 and 5 include a common operating device 10a and a common operating link mechanism 10 that can operate both devices simultaneously.
b, is arranged.

Furthermore, the busbar side disconnector 2 and the trackside disconnector 6 are provided with a common operating device 11a and a common drive shaft 11b that can operate both devices simultaneously.

Note that the common operation link mechanism 10b and the common drive shaft 11b can be operated at the same time.If it becomes necessary to drive only one of the two devices connected together, the connection can be removed. It is configured so that it can be

Effect of this embodiment When operating the circuit breaker 3 during inspection, the circuit breaker earthing devices 4 and 5 or the disconnectors 2 and 6 are configured so that they can each be operated with one operating device, so only the two operating devices @ 10a and 11a can be operated. Just do it. As a result, circuit breaker maintenance and inspection work is greatly simplified and work efficiency is improved.

Furthermore, since the number of upstream circuit breaker grounding devices and disconnector operating devices can be reduced compared to the prior art, the number of parts constituting the gas insulated switchgear is reduced, and costs can also be reduced.

Furthermore, since there is no need for an operating floor that conventionally had to be placed near the gas insulated switchgear, the installation space for the gas insulated switchgear can also be reduced.

*Other Embodiments* The present invention is not limited to the above-mentioned embodiments, but can also be applied to a three-phase bracket type gas insulated switchgear. Further, it may be configured such that only one of the circuit breaker grounding devices 4 and 5, or the busbar side disconnector 2 and the line side disconnector 6 can be operated by the common operating devices 10a and 11a.

[Effects of the Invention] As described above, according to the present invention, it is possible to drive the grounding devices or disconnecting switches for maintenance and inspection connected to both sides of the interrupting part of the circuit breaker using a common operating device. By this simple configuration, it is possible to provide a gas insulated switchgear that is easy to maintain and inspect, has a reduced number of parts, is highly economical, and can be miniaturized.

[Brief explanation of the drawing]

Fig. 1 is a side view showing one embodiment of the gas insulated switchgear of the present invention, Fig. 2 is a sectional view taken along line AA in Fig. 1, and Fig. 3 is an iJi line connection diagram of the main circuit of the gas insulated switchgear. 4 is a side view showing an example of a conventional gas insulated switchgear, and FIG. 5 is a sectional view taken along line B-8 in FIG. 4. DESCRIPTION OF SYMBOLS 1... H) line, 2... Busbar side disconnector, 2a... Busbar side disconnector operating device, 2b... Drive shaft, 3...
... Breaker, 4.5... Grounding device for circuit breaker, 4a, 5
a... Operating device for grounding device for circuit breaker, 4b, 5b...
・Operation link mechanism, 6... Track side disconnector, 6a...
Track side disconnector operating device, 6b... Drive shaft, 7
... Track grounding device, 7a... Operating device for track grounding device, 7b... Operation link mechanism, 8... Track connection terminal, 9... Operation floor-110a... Cutoff 10b...Common operating link mechanism for grounding devices for circuit breakers, 11a...Common operating device for disconnecting switches, 11b...Common driving shaft for disconnecting switches.

Claims (1)

[Scope of Claims] In a gas-insulated switchgear in which a grounding device and a disconnector for maintenance and inspection are connected to both sides of the interrupting part of the circuit breaker, the grounding device or the disconnector is connected to both sides of the interrupting part of the circuit breaker. A gas-insulated switchgear characterized in that the gas-insulated switchgear is configured such that the two can be driven using a common operating device.