JPH0530125B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a gas-insulated switchgear used as a component of a gas-insulated switchgear, and in particular to a gas-insulated switchgear with an improved operating mechanism housing. It is related to vessels.

[Technical Background of the Invention] In substations or switchyards installed around large cities or coastal areas, electrical equipment constituting substations, etc. may be moved to SF due to difficulty in acquiring land or for reasons of salt damage prevention. A gas insulated switchgear sealed in a container is used together with an insulating medium such as ₆ gas that has excellent insulation and arc extinction properties. This type of gas-insulated switchgear has much better insulation than air insulation, so
The disconnectors, disconnectors, and other necessary equipment are arranged three-dimensionally, and the distance between each piece of equipment is narrowed, thereby significantly reducing the size of the entire site.

Furthermore, recently, a three-phase integrated type gas-insulated switchgear has been proposed, which is designed to further reduce the overall size by housing three-phase current-carrying conductors in one container.

Among such gas-insulated switchgears, an example of a three-phase integrated type is shown in FIG.

In this gas insulated switchgear, the breaker 20
is arranged so that the axis of the container 21 filled with insulating gas is perpendicular to the installation surface. Inside the shield breaker container 21, there is a shield breaker section 22 for each phase having fixed side and movable side electrodes that can be brought into contact with and separated from each other.
are arranged so that their operating axes are parallel to the axis of the sheath cutter 21. Shiya section 2
Current-carrying conductor 2 of each phase led out from the lower terminal of 2
3 branches the current-carrying conductor 24 upward inside the shroud breaker container 21, and then leads out from a first outlet terminal 25 provided below the side surface of the shroud breaker container 21. Further, a current-carrying conductor 24 branched upward from the current-carrying conductor 23 is arranged parallel to the axis of the case breaker container 21 for each phase, and is placed above the first outlet terminal 25 on the side surface of the case breaker container 21. second provided
It is led out from the output terminal 26 of. The first and second lead terminals 25 and 26 have a disconnecting section 2.
Main busbars 29 and 30, which are integrated with 7 and 28, are connected respectively.

On the other hand, the current-carrying conductors 31 of each phase led out from the terminals above the shroud section 22 are connected to the instrument current transformers 31 arranged for each phase above the shingle section 22 in the shingle breaker container 21. through the second side of the breaker container 21.
It is led out from a third output terminal 33 provided above the output terminal 26 of. A cable connecting portion 36 and a voltage transformer 37 are connected to this third outlet terminal 33 via a disconnector 34 and a grounding device 35 .

[Problems with Background Art] Incidentally, in the gas-insulated switchgear as described above, the external lead-out portion led out from the third lead-out terminal 33 is provided with a line disconnector 34 and a grounding device 35. Conventionally, the operating mechanisms 34a and 35a of these devices are connected to a container 40 connected to a third outlet terminal 33, as shown in the enlarged view of FIG.
The cylindrical storage portions 34b, 35b are welded and fixed together by the same means as when providing a lead-out portion for the conductor on the outer periphery of the cylindrical storage portions 34b, 35b.
I was trying to store it inside.

However, as in the past, providing two cylindrical openings, one for the disconnector and the other for the grounding device, on the outer periphery of the container is not enough to provide the busbar container 40 that connects the disconnector 20 and the cable connection section 36. A long cable is required, which makes it impossible to arrange the cable disconnector 20 and the cable connection part 36 close to each other, which prevents the overall size and size of the gas insulated switchgear.

Further, from the operating mechanism section 34a of the disconnector 34,
The insulating rod 34d is extended toward the movable contact 34c of the disconnector, and the pinion 34f provided at the tip of the insulating rod 34d meshes with the rack 34g on the movable contact 34c, so that the rotational force from the operating mechanism 34a is applied. The movement is converted into linear motion of the movable contact 34c via the insulating rod 34d. However, if the operating mechanism part 34a protrudes above the busbar container 40 as in the past, the distance from the operating mechanism part 34a to the movable contact 34c is large, and the insulating rod 34d is required to be that long. Another problem is that the insulating rod 34d needs to be thick and strong in order to withstand operating forces such as torsion applied when opening and closing the disconnector.

Furthermore, in the case of the line disconnector 34 which is located close to the grounding device 35 as shown in the figure, the operating mechanism storage portions of each are large, so the disconnector container and the grounding device container are provided separately, and both are separated. Since the connection was made through a connecting flange, the overall structure of the container was complicated, making it difficult to downsize.

The above-mentioned problems are not limited to the disconnect switch used in the three-phase bulk gas-insulated switchgear shown in the figure, but also apply to single-phase disconnect switches and other switches other than the disconnect switch. They exist in exactly the same way.

[Object of the Invention] The present invention was proposed to solve the problems of the prior art as described above, and its first purpose is to
The operating mechanism storage section provided outside the busbar container is made smaller, making it possible to downsize and downsize the entire gas-insulated switchgear.It also enables the operating mechanism section and the movable contact section to be placed close together, making it possible to reduce the size of the insulating rod. An object of the present invention is to provide a gas insulated switch whose strength is improved by shortening the switch.

A second object of the present invention is to reduce the size of the operating mechanism of the switch by housing the opening/closing part of the switch and the contact of the grounding device in the same sealed container. The object of the present invention is to provide a simplified gas-insulated switch with a combined earthing device.

[Summary of the invention] The gas insulated switch according to the first invention of the present application has the following features:
Fixed side and movable side contacts and movable contacts are arranged in a straight line inside the bus bar container, and a box-shaped operating mechanism storage part with an opening on the outside is provided in a notch provided on the outer periphery of the bus bar container. By attaching and fixing the base bar so that its bottom part protrudes from the inner periphery of the busbar container, it is possible to arrange the operating mechanism part and the movable contact part in close proximity to each other. Further, in the gas insulated switch according to the second aspect of the invention, an operating mechanism housing section for the grounding device is provided in the airtight container in close proximity to an operating mechanism housing section for the opening/closing section, and the operating mechanism in the opening/closing section is accessible from the operating mechanism housing section for the opening/closing section. A movable contact that can be freely connected and separated is provided on a fixed contact provided on a current-carrying conductor extending from the switch, so that the switching section and the grounding device contact are housed in the same sealed container. This eliminates the need for connection to a grounding device.

[Embodiments of the Invention] Hereinafter, the present invention will be specifically described with reference to the embodiments shown in FIGS. 1 and 2, in which the invention is applied to the same three-phase gas-insulated switchgear as shown in FIG. 3.

In FIGS. 1 and 2, a third outlet of a shunt breaker container 2 is connected and fixed via an insulating spacer 3 to one opening of a busbar container 1 that houses the opening and closing part of a switch. A container 4 of a cable connection portion is similarly connected and fixed to the other opening via an insulating spacer 5.

Inside the busbar container 1, a three-phase wire and disconnection side conductor 6 supported by the insulating spacer 3 and a three-phase cable connection part side conductor 7 supported by the insulating spacer 5 are arranged for each phase. They are arranged opposite each other in a straight line.
As shown in Fig. 2, the conductors of these three phases are arranged such that two phases a and b are located on the horizontal diameter line of the bus bar container 1, and a third phase c is located on the horizontal diameter line of the bus bar container 1. It is located below the two phases a and b, and as a whole, each phase conductor a, b, and c is located at each vertex of a right-angled isosceles triangle whose base is the radius.

For each phase of the conductor, a cylindrical movable electrode 9 is provided at the tip of the breaker side conductor 6, and a cylindrical fixed electrode 8 is provided at the tip of the cable connection portion side conductor 7. There is. Inside the movable electrode 9,
A movable contact 10 is slidably assembled along the axial direction of the conductor, and a rack 11 is provided on the surface of the movable contact 10.

At the top of the busbar container 1, there is a switch operation mechanism section 1.
2 is provided. The storage section 13 of the operating mechanism section 12 is a box-shaped member with an open top, and the top of the busbar container 1 is cut out in a saddle shape, and the cutout section 13a
The box-shaped member is mounted and fixed inside the busbar container 1 so that its bottom part protrudes from the inner surface of the busbar container 1. In this case, in this embodiment, the bottom corner of the box-shaped member is formed into an arc shape in consideration of its proximity to the conductor to ensure shielding performance.

The upper opening of the storage section 13, which is made of a box-shaped member, is sealed by a cover plate 14, and the operating mechanism section 12 is housed therein. In this embodiment, as shown in FIG. 2, this operating mechanism includes a bevel gear 12a that meshes with the tip of the main shaft of an operating device (not shown) fixed to the side surface of the storage section 13, and gears of each phase that are interlocked with this bevel gear. The gear groups 12b of each phase are fixed to the base ends of insulating rods 15a, 15b, and 15c extending perpendicularly to the conductors a, b, and c of each phase, respectively. These insulating rods 15a, 15b, 1
A pinion 16 is fixed to the tip of each of the pinions 5c,
This pinion 16 is the movable contact 1 of each phase described above.
0 racks 11, respectively.

A grounding device 17 is provided on the cable connecting portion side of the storage portion 13 of the operating mechanism portion 12 of this switch. Similar to the conventional gas-insulated switchgear, this grounding device 17 is provided with its operation mechanism storage portion 18 projecting from the top of the busbar container 1, which is a container for the switch, and extends from the operation mechanism 19 inside. The movable contact 19a of each phase is configured to be able to come into contact with and separate from the fixed contact 19b provided on each phase conductor.

In the gas insulated switch of this embodiment having such a configuration, the bottom of the storage section 13 of the operation mechanism section is provided so as to protrude into the inner surface of the bus bar container 1, so that the operation mechanism section 12 and the movable The distance to the contactor 10 is shortened, and the insulating rods 15a, 15b, 15c disposed between them can be shortened accordingly, eliminating the risk of twisting or bending the insulating rods, and making it possible to reduce the diameter of the insulating rods.

In particular, in a three-phase all-in-one type gas-insulated switchgear, the shape of the operation mechanism is elongated in the direction in which the insulating rods of each phase are arranged, that is, in the radial direction of the busbar container. However, in this embodiment, the storage part is made into a rectangular shape along the direction in which the insulating rods are arranged. By making it box-shaped, there is no wasted space in the storage section, and the busbar container can be shortened. As described above, by downsizing the switch operating mechanism and shortening the busbar container, it is now possible to integrate the switch and the grounding device into the same busbar container.
The entire gas insulated switchgear can be made smaller and smaller.

Furthermore, when the third phase is arranged below the other two phases as shown in the figure, the bottom of the storage section 13 is connected to the bus bar container 1.
Even if it protrudes from the inner surface of the third phase, a sufficient insulation distance between the third phase and the storage portion 13 can be ensured, so that insulation reliability is also improved.

Note that the present invention is not limited to the three-phase bulk type gas-insulated switchgear as described above, but can also be applied to a single-phase type gas-insulated switchgear. There is no need to hire a department;
The storage section may be formed of a square or circular box-shaped member with an upward opening. However, even in that case,
The bottom of the storage section should protrude from the inner surface of the bus bar container, and it is necessary to bring the internal operating mechanism and movable contact closer to each other.

Further, in the gas insulated switch of the above embodiment, the bus bar container connecting the cable disconnector and the cable connection part is used as the switch container, but the first invention of the present application is the bus bar container. It is also applicable to gas-insulated switchgears that incorporate a dedicated sealed container between them.

Similarly, the first invention of the present application is applicable to switches installed at other locations other than the composite line switch integrated with the above-mentioned grounding device.

[Effect of the invention] As mentioned above, according to the first invention of the present application,
A simple configuration in which the operating mechanism storage section is provided in the busbar container housing the opening/closing section so that its bottom protrudes from the inner surface of the container improves operational reliability by shortening the insulating rod and improves the reliability of the gas-insulated switchgear. small size,
This has the effect of providing a gas insulated switch that can be downsized.

Further, according to the second invention, it is possible to use both the switch container and the grounding device container, and by combining both, it is expected that the entire gas insulated switchgear will be more compact and downsized, and at the same time, there is no connecting part between the two. This also has the effect of simplifying the assembly work.

[Brief explanation of the drawing]

Fig. 1 is a side sectional view showing one embodiment of the gas insulated switch of the present invention, Fig. 2 is a sectional view taken along line A-A in Fig. 1, and Fig. 3 is a side sectional view showing an embodiment of the gas insulated switch of the present invention. FIG. 4 is a side view showing the entire gas insulated switchgear, and FIG. 4 is a side sectional view of a conventional gas insulated switchgear and grounding device. 1... Busbar container, 2... Shiya disconnection container, 3...
Insulating spacer, 4...Cable connection container, 5
...Insulating spacer, 6...Shoulder disconnector side conductor, 7...
...Cable connection side conductor, 8...Movable side electrode, 9
... Fixed side electrode, 10 ... Movable contact, 11 ...
rack, 12... operating mechanism section, 13... storage section,
13a... Notch part of busbar container, 14... Lid plate,
15a, 15b, 15c...Insulating rod, 16...
. . . pinion, 17 . . . grounding device, 18 . . . operating mechanism storage section, 19 .

Claims (1)

[Scope of Claims] 1. A fixed electrode and a movable electrode are arranged facing each other at a predetermined interval in a closed container filled with an insulating medium, and the movable electrode has a fixed electrode with respect to the fixed electrode. In a gas insulated switch in which a disconnecting section is constructed by slidably incorporating a movable contact that can be freely connected and detached, a notch is formed in the wall of the sealed container, and a box-shaped The operating mechanism housing section is mounted and fixed so that its bottom part protrudes from the inner periphery of the busbar container, and the movable contact is driven by an insulating rod extending from the operating mechanism section inside the housing section. gas insulated switchgear. 2. The gas insulated switch according to claim 1, wherein the hermetic container houses conductors for three phases all at once. 3. The insulating rods of each phase that connect the movable contacts provided on the conductors of each phase and the operating mechanism section are arranged perpendicular to the axial direction of the sealed container, and the operating mechanism section that drives these insulating rods is The gas according to claim 2, wherein the gas is stored in a rectangular storage section extending perpendicularly to the axial direction of the closed container, and the storage section is installed and fixed in a saddle-shaped notch formed in the wall surface of the closed container. Insulated switch. 4 Three-phase conductors are arranged so as to pass through each vertex of a right-angled isosceles triangle whose base is the radius of the closed container,
The gas insulated switch according to claim 2 or 3, wherein the operating mechanism housing portion is provided on the opposite side of the third phase across the base of the right-angled isosceles triangle. 5. The gas insulated switch according to claim 1, wherein the closed container houses a single-phase conductor therein. 6 In a sealed container filled with an insulating medium, a fixed side electrode and a movable side electrode are arranged facing each other at a predetermined interval, and the movable side electrode can be freely moved towards and away from the fixed side electrode. In a gas insulated switch that has a disconnecting section formed by slidably incorporating a movable contact, a notch is formed in the wall of the sealed container, and a box-shaped operating mechanism storage part is placed inside the notch. The movable contact is mounted and fixed so that its bottom protrudes from the inner periphery of the bus bar container, and an insulating rod extending from the operation mechanism section in the storage section drives the movable contact. A grounding device operating mechanism storage section is provided adjacent to the storage section, and a movable contact that can freely approach and separate from the fixed contact provided on the current-carrying conductor extended from the disconnection section is provided from the operation mechanism in this storage section. A gas insulated switch characterized by being provided with.