JPH0414829Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a tank-type gas circuit breaker, and particularly to a tank-type gas circuit breaker used in gas-insulated substation equipment.

[Conventional technology]

Conventionally, in tank-type gas circuit breakers that have two or more cutoff points, the operating mechanism is attached to the bottom or side of the tank body due to the structure of the connection mechanism between the arc extinguishing chambers that serve as the cutoff points, and the operating mechanism. Ta. but,
In order to reduce the installation area, which is one of the advantages of gas-insulated substation equipment, the phase spacing of tank-type gas circuit breakers is
It is set to the minimum value in consideration of ease of maintenance work, and as a result, a configuration in which the operating mechanism is disposed below the tank body has become mainstream.

1 and 2 show the configuration of such a conventional device, in which a tank body 1' of a gas circuit breaker 1 is connected to a gas insulated substation equipment body 2 supported by a plurality of support legs 3, and the tank body 1' An operating mechanism box 4 and a connecting mechanism box 5 were arranged below. Then,
The support leg 3 was fixedly connected to the tank body 1'.

[Problems with conventional technology]

In such a configuration, during maintenance of the operating mechanism or when a failure occurs, the operating mechanism box 4
In order to remove it, the entire gas circuit breaker 1 must be moved in the direction of arrow a as shown in FIG. 3, and then the operating mechanism box 4 must be removed sideways as shown by arrow b. It had been. In addition, this work requires the recovery and refilling of the gas in the gas compartment including the gas circuit breaker 1, as well as the removal and reinstallation of the necessary conductors inside the tank body 1', resulting in a reduction in work man-hours and
The drawback was that it required a lot of time for power transmission to be stopped.

Furthermore, it is conceivable to remove the operating mechanism box 4 in the front direction of the gas circuit breaker 1, but in that case it is necessary to set the distance between the phases of the gas circuit breaker 1 to be large, and as a result, the installation of the entire gas insulated substation equipment becomes difficult. This is not preferable because the area increases.

[Purpose of invention]

Therefore, the purpose of this invention is to eliminate the above-mentioned conventional drawbacks, and to eliminate the need to move the entire gas circuit breaker when removing and installing the operation mechanism box during maintenance of the gas circuit breaker or when a failure occurs. By doing so, the purpose is to significantly facilitate the work, eliminate the need for stopping power transmission, and prevent the interphase distance of the gas circuit breaker from increasing.

[Means for achieving the purpose]

The means for achieving the above object according to the present invention is achieved by making most or all of at least one support leg supporting the tank body removable from the tank body. [Example] Each example of this invention will be described in detail below.

FIG. 4 shows an embodiment of this invention. In the figure, of the support legs 3 of the tank body 1'', the support leg on the operation mechanism box 4 side is composed of a fixing part 3a and a detachable part 3b to the tank body 1'', and both are electrically connected by a grounding wire 6. At the same time, they are mechanically connected in a removable manner. Other parts that are the same as those in FIG. 1 are designated by the same reference numerals, and their explanation will be omitted.

Next, the action and effect will be explained. If a failure occurs in the operating mechanism, or if you wish to remove the operating mechanism box 4 during maintenance of the operating mechanism, release the coupling mechanism and remove the support leg 3.
By removing the ground wire 6 and detachable portion 3b as shown by arrow A in FIG. 5, the operating mechanism box 4 can be easily removed in the direction of arrow B.

In the above work, there is no need to move the gas circuit breaker 1, so the number of work steps is significantly reduced compared to the conventional one. Furthermore, since the power transmission state can be maintained during this work, there will be no problem of power transmission being stopped.

FIGS. 6 and 7 show another embodiment in which the gas circuit breaker 1 is supported on a pedestal 7 that is common to three phases, and a plurality of supports that are constituent parts of the pedestal 7 that supports the tank body 1'' are shown in FIG. Of the legs 7b, the support leg 7b on the operating mechanism box 4 side is configured to be detachable by the connecting portion 7a, and the same effect is achieved.

[Effect of idea]

As described above, despite the simple configuration of this invention, the operating mechanism box can be easily removed and installed without moving the entire gas circuit breaker.
Its effects are significant, such as greatly simplifying work when the operating mechanism fails or during maintenance, and eliminating the need to stop power transmission.

[Brief explanation of drawings]

Figure 1 is a front view of the conventional device, Figure 2 is a side view thereof, Figure 3 is a front view explaining its operation, Figure 4 is a front view of an embodiment of this invention, and Figure 5 is a front view explaining its operation. 6 is a front view of another embodiment of this invention, and FIG. 7 is a side view thereof. 1... Gas circuit breaker, 1''... Tank body, 2...
...Gas-insulated substation equipment body, 3,7b...Support legs,
3a... Fixed part, 3b... Detachable part, 4... Operation mechanism box, 5... Connection mechanism box, 6... Ground wire, 7...
Frame, 7a... joint portion. In each figure, the same reference numerals indicate the same or equivalent parts.

Claims (1)

[Scope of Claim for Utility Model Registration] A tank body supported by a plurality of support legs and connected to a gas-insulated substation equipment body, with a coupling mechanism box and an operation mechanism box disposed on the lower side, and two or more In the tank-type gas circuit breaker having a cutoff point, all or most of the at least one support leg provided on the operation mechanism box side is configured to be detachable while supporting the tank body. A tank-type gas circuit breaker featuring: