JPS59226604A - 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 improvements in gas insulated switchgear.

[Background of the invention].

As high voltage and capacity increase, gas insulated switchgear also becomes larger. A gas insulated switchgear has various switching devices such as a gas breaker, a disconnector, and a grounding switch, and each has an operating device for each of these switches. These operating devices are generally placed near the switch for reasons such as simplifying the link mechanism.

Therefore, in a large-sized gas-insulated switchgear, there is a switch constructed at a high place, making it difficult to perform regular inspections of the operating device. Therefore, in general, an inspection table was constructed and the operator inspected the operating equipment on the inspection table, but the scale of the inspection table became enormous, and the ratio of the inspection table to the gas-insulated switchgear was extremely large. It gets bigger.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a gas-insulated switchgear that reduces the number of inspection tables and facilitates inspection of the operating device.

[Summary of the invention]

The present invention provides an inspection stand across the main busbar, and this inspection stand is also used for inspecting the operating device of the main bus-side disconnector, and an inspection passage is formed in the phase direction on the main busbar side of the gas breaker. This is what I did.

According to this configuration, the inspection stand required for crossing the main bus line can also be used for inspection, and its structural length can be reduced to a length that exceeds the main bus line.

Furthermore, although this increases the height of the disconnector operating device, on the other hand, this height is fully utilized to form the inspection passage, resulting in an overall superior gas insulated switchgear. To form an inspection path, its height can be determined so that at least 180 (7) people can walk underneath it.

[Embodiments of the invention]

The present invention will be described in detail below as shown in the drawings.

Although FIG. 1 and FIG. 2 show one unit for three phases, other units are configured corresponding to the circuit configuration, and illustration of these is omitted.

In particular, as can be seen from FIG. 2, the gas insulated switchgear consists of main busbars 1, 2, other switches, etc.

The main busbar is a phase-separated type with a double busbar system, and a total of six busbar tubes are arranged near the attached surface at the same level and almost parallel. In a direction perpendicular to the main bus lines 1 and 2, there is a gas breaker 3 which is arranged substantially horizontally and is operated by an operating device 15.

One end of the gas circuit breaker 3 is connected to the main busbars 1 and 2 via disconnectors 4 and 5, respectively. A disconnector 4.5 is connected above the main buses 1, 2, and both disconnectors and the gas breaker 3 are connected by a straight connecting conductor 6.7. Such a configuration from the main bus bar 1.degree.

At the other end of the gas breaker 3, there is a container 8 with the same central axis.
．． 9 is connected. Inside the container 8 there is an operating device 10.1.
A disconnector and a grounding switch are respectively operated by the bushing 1 and connected to the center conductor of the bushing 12 through a part of the container 9. Inside the container 9 is an operating device 13.
A disconnect switch operated by the above is constructed, and one end of the lightning arrester 14 is connected to the center conductor of the bushing via this disconnect switch. As shown in FIG. 1, an L-shaped container 16 for position change is connected between the containers 8 and 9 for the two phases except for the middle phase.

In other embodiments, the other end of the gas breaker 3 and the bushing 1
Various methods can be used, such as using a container that connects the gas circuit breaker 3 in a straight line, or connecting the other end of the gas circuit breaker 3 to the container 8 after being led out in the radial direction of the tank. The operating device 17.18 of No. 5 is provided in the vicinity thereof, and the operating devices 10, 11.13 are arranged below the container 8.9. The operating device 10.degree. 11.13 is arranged at a height that allows an operator standing on the installation surface to carry out inspection work. In the gas insulated switchgear with the linear configuration shown in the drawing, the height of the gas breaker 3 and the height of the new line switch 4.5 can be further lowered, but it is possible to lower the height of the gas breaker 3 and the connecting conductor without intentionally doing so. In order to use the lower portions of containers 7 and 8 and 9 as inspection passages, a distance greater than about 2 m is secured between their lower ends and the attached surfaces.

On the contrary, this idea would make the height of the disconnectors 4 and 5 unnecessarily high, but in this embodiment, the operating devices 17 and 18 are deliberately constructed at a high place. Inspection of the operating device 17, 18 at such a height can no longer be carried out from the mounting surface.

Therefore, an inspection table 19 is provided as shown in FIG. 2, and the operating devices 17 and 18 are inspected from the inspection table 19. Moreover, this inspection table 19 has ramps 20 on the gas breaker and anti-gas breaker sides of the main buses 1 and 2, respectively.
．． By providing 21, it becomes possible to move beyond the main busbars 1 and 2 for inspection. In order to promote this effect, as shown in FIG. 1, an inspection platform 19 is provided in which the inspection passage is continuous so that it can be used for a plurality of phases, for example, three phases.

In this way, the passageway for crossing the main busbars 1 and 2 can also be used as an inspection platform 19 for inspecting the operating devices of the disconnectors 4 and 5.

FIG. 3 shows a gas insulated switchgear according to another embodiment. Components corresponding to those in FIG. 2 are given the same reference numerals and detailed explanations will be omitted.

In this embodiment, the gas breaker 3 is placed low near the installation surface, and both ends of the gas breaker 3 are led out once upward in the radial direction of the tank, and are connected to the containers 7 and 8 through vertical containers 22 and 23, respectively. . This embodiment also provides the same effects as the previous embodiment.

In yet another embodiment, the right end side of the gas circuit breaker 3 shown in FIG. 3 may be connected by a container 8 located on an extension of the central axis of the gas circuit breaker 3. At this time, the operating device 10, 11.1
3 is preferably arranged on the side of the container 8.9. However, in consideration of the inspection time required by inspection workers, it is recommended to form inspection passages on both sides of the gas breaker 3 in the longitudinal direction so that they can move in the opposite directions, as in the embodiments shown in FIGS. 2 and 3. It is better to at least form an inspection path on the main bus 1.2 side of the gas circuit breaker 3 so that it can move in the phase direction.

Therefore, in this type of equipment, a method is generally adopted in which the main busbars 1 and 2 are arranged above the connecting conductors 6 and 7, but in this method, the main busbar side of the gas breaker 3 is Since it is not possible to form a passage and the inspection table 19 cannot be used effectively, it is preferable to arrange the main busbars 1 and 2 downward.

〔Effect of the invention〕

As described above, the present invention provides an inspection stand and a ramp so as to straddle the main bus bar placed near the attachment surface, and the operating device of the disconnect switch on the main bus side is inspected from this inspection stand. In addition to making use of the gauze breaker for multiple purposes, it is possible to form an inspection path in the phase direction at least on the main bus bar side of the gauze breaker.

[Brief explanation of drawings]

FIG. 1 is a plan view of a gas insulated switchgear according to an embodiment of the present invention, FIG. 2 is a front view of FIG. 1, and FIG. 3 is a front view of a gas insulated switchgear according to another embodiment of the present invention. be.

Claims (1)

[Claims] 1. A gas breaker having one end connected to the main bus bar through a bus-side disconnect switch configured above the main bus bar, which is arranged almost horizontally near the attachment surface, and the above-mentioned An inspection platform is provided that straddles the main busbar and has ramps on both sides, the operating device for the bus-side disconnector is installed at a height that allows inspection from the inspection platform, and the gas circuit breaker is placed approximately horizontally. A gas insulated switchgear characterized by forming an inspection passage in the phase direction at the main bus bar side end.