JPH08140226A - Gas insulated switchgear - Google Patents

Abstract

PURPOSE: To reduce in size and weight a gas sealed vessel by providing a semicircular blade for a switching operation between the hinge contact of a disconnecting switch mounted at a conductor in the vessel by a bushing through the vessel and the clip contact of the disconnecting switch corresponding to the contact. CONSTITUTION: Three-phase bushings 17 of a disconnector side are vertically arranged at the front face plate 16 of a gas sealed vessel 15. A bus conductor 19 is connected to the end of the inner conductor 18 of the bushing 17. The hinge contact 20 of the disconnecting switch of each phase is mounted at the conductor 18 via the conductor 19. A long mounting base 23 is provided in the vessel 15, and a rotary shaft 26 is rotated at upper and lower bearings 24, 25. A clip contact 41 is provided at the height corresponding to the contact 20 of each phase, and a semicircular blade 31 rotated between both contacts 20 and 41 is provided. A handle 30 is rotated, the shaft 26 is rotated via a bevel gear 27, and the contacts 20 and 41 are switched by the blade 31. Thus, the vessel is reduced in size and weight, and its gas quantity is reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas insulated switchgear in which a main circuit charging section is housed in a gas hermetically sealed container filled with an insulating gas, and more particularly to a busbar disconnector thereof.

[0002]

Conventionally, this type gas insulated switchgear is constructed as shown in FIG. 6, the upper left and right sides respectively of the front plate 2 of the gas container 1 with an insulating gas sealed, such as SF ₆ gas, upper and lower 3-phase busbar bushing 3 arranged in the direction
Is airtight.

In the gas-tight container 1, the inner conductors of the busbar bushings 3 on the left and right sides are connected at their ends by busbar conductors 4 for each phase, and the busbar conductors 4 for each phase are connected.
Are connected to the branch conductors 5 of each phase. Furthermore, a unitized slide type busbar disconnector 6 is provided in the center of the inside of the gas closed container 1, and the ends of the branch conductors 5 of each phase are connected to the clip contacts 7 of each phase of this disconnector 6. ing.

[0004] As is well known, the disconnector 6 includes a front plate 2.
Insulators 9 and 10 for each phase are provided on the base 8 fixed to the lever 8, and the clip contacts 7 and the hinge contacts 11 are supported by both insulators 9 and 10, and the lever 1 supported by the base 8 is supported.
2, blade 13 which is always in contact with hinge contact 11
Is attached, and the blade 12 of each phase is slid by the rotation of the lever 12 by the cutting operation to separate it from the clip contact 7.

The hinge contact 11 of the disconnector 6 is provided with a connection conductor 14 and a circuit breaker (not shown) arranged directly below the disconnector 6 in the container 1, and a cable bushing penetrating the front plate 2. The cable on the load side is connected via.
Further, a plurality of this type of gas-insulated switchgear is usually installed in an electric power facility, and busbar bushings 3 of respective phases of adjacent switchgear are connected by a busbar and connected in series.

[0006]

In the case of the conventional gas-insulated switchgear, the busbar bushing 3 and the disconnecting switch 6 are separately provided in the gas-tight container 1 so as to be vertically separated from each other. It becomes larger and heavier, and the amount of gas increases, making it more expensive and assembling.
There is a problem that handling becomes difficult.

According to the present invention, a busbar bushing and a busbar disconnector are integrally provided in a gas-tight container without being divided, and the gas-tight container is made compact and lightweight.

[0008]

To achieve the above object, in a gas-insulated switchgear according to the present invention, a busbar bushing penetrating the gas-tight container and a gas-tight container of the busbar bushing are provided. A disconnector hinge contact attached to the conductor, a disconnector clip contact provided at a position facing the disconnector hinge contact, a rotary shaft provided between both contacts, and rotating by an on / off operation, and a rotary shaft And a semi-circular blade that rotates integrally with each other, contacts both contacts by an inserting operation, and makes either one of the contacts in a non-contact state by a cutting operation.

[0009]

In the case of the gas-insulated switchgear of the present invention constructed as described above, the rotary busbar disconnector is formed by the disconnector hinge contact, the disconnector clip contact, and the blade attached to the rotary shaft. . Since this disconnector is directly connected to the busbar bushing, the busbar bushing and the busbar disconnector are integrally provided in the gas sealed container without being divided, and the gas sealed container can be made smaller and lighter.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment will be described with reference to FIGS. In those drawings, 15 is SF inside
It is a gas-tight container in which an insulating gas such as ₆ gas is sealed, and has a smaller vertical dimension than the conventional one, and the front plate 16 is made of a thick plate. 17 is the front plate 1
A busbar bushing of the three phases on the disconnector side, which is provided through the airtightly on the upper left side of 6 and in which each phase is arranged in the vertical direction, 18 is an internal conductor of the busbar bushing 17, and 19 is the left end portion in the gas sealed container 15. Is a three-phase busbar conductor connected to the end portion of the internal conductor 18 of the power receiving side, and the right end portion of each of them is provided on the right side of the upper portion of the front plate 16 in the same manner as the busbar bushing 17 and on the power receiving side. It is connected to the end of the inner conductor of a bushing (not shown).

Reference numeral 20 denotes an internal conductor 18 via a bus bar conductor 19.
Is a disconnector hinge contact of each phase attached to the end of each of the upper and lower hinge pieces 21 and 2 of the L-shaped conductor.
2 are attached to the ends of the inner conductor 18 in a so-called back-to-back state.

Reference numeral 23 is a vertically long mounting base integrally provided on the left inner wall of the gas closed container 15, 24 and 25 are bearing arms horizontally provided at the upper and lower ends of the mounting base 23, and 26 is a bearing arm at the upper end. Is a rotating shaft supported by 24, and the lower end is a bearing arm 25.
Penetrates through.

27 is a bevel gear consisting of a gear 28 at the lower end of the rotary shaft 26 and a gear 28 'meshing with the gear 28, and 29 is a horizontal operating rod of an insulator formed by the shaft of the gear 28'. The front end penetrates the front plate 16 and projects to the outside of the gas hermetic container 15. Reference numeral 30 is a handle attached to the tip of the operating rod 29.

Reference numeral 31 denotes a three-phase blade mounted via a bearing 32 at a height position corresponding to the hinge contact 20 of each phase of the rotary shaft 26. 26 penetrates the shaft hole 31 ′ and rotates integrally with the rotating shaft 26, and a part of the peripheral edge is sandwiched between the upper hinge piece 21 and the lower hinge piece 22 and is always in contact with the hinge contact 20.

Reference numeral 33 is a hinge contact 2 of the blade 31.
A guide groove formed in a contact portion with 0, 34 is a guide shaft that penetrates through the upper hinge piece 21, the guide groove 33, and the lower hinge piece 22, and the upper and lower end portions of the upper hinge piece 21 have an upper surface side, Nuts 35 and 36 are attached from the lower surface side of the lower hinge piece 22, respectively. 37 is a lower hinge piece 2
2 is a spring interposed between the lower surface of 2 and the nut 36.

Reference numeral 38 denotes a support insulator of each phase horizontally mounted at a height position corresponding to the blade 33 of each phase behind the bearing arms 24 and 25 of the mounting base 23, and 39 denotes a support insulator 38 of each phase. It is an L-shaped conductor three-phase terminal plate attached to the end face, forms a so-called terminal block, and is connected with the connection conductors 40 of each phase corresponding to the connection conductor 14 of FIG.

Reference numeral 41 denotes a three-phase clip contact provided at a position facing the hinge contact 20 of each phase via the rotary shaft 26, and an upper clip piece 42 of an L-shaped conductor.
The lower clip piece 43 and the lower clip piece 43 are formed by attaching them back to back to the support insulator 38 via the terminal plate 39, and the blade 31 is rotated between the clip pieces 42 and 43 by the rotation of the blade 31.
Is inserted and removed.

Reference numeral 44 denotes a guide shaft that penetrates through the tip portions of both clip pieces 42 and 43, and springs 45 and 46 from the upper surface side of the upper clip piece 42 and the lower surface side of the lower clip piece 43 at both upper and lower ends. Nuts 47 and 48 are attached via. Reference numeral 49 is a notch formed in the blade 31, and the guide shaft 44 is positioned when the blade 31 rotates.

When the handle 30 is rotated, the rotary shaft 26 rotates counterclockwise during the insertion operation, and the blades 31 of each phase are rotated.
Rotate together in the same direction. By this rotation, the guide shaft 34 of the hinge contact 20 contacts one end of the guide groove 30, and when the blade 31 is positioned in the state shown by the solid line in FIG. 1, the contacts 20 and 41 of each phase are connected via the blade 31. It turns on (closed).

Next, the cutting operation causes the rotary shaft 26 to rotate about 1/4 clockwise, the guide shaft 34 of the hinge contact 20 contacts the other end of the guide groove 30, and the blade 31 moves to the position shown in FIG.
In the state of the broken line of FIG. 3, the blade 31 separates from the clip contact 41, and this contact 41 is brought into non-contact with the blade 31.
The space is opened and the state becomes "open (open)".

The rotary busbar disconnector 50 corresponding to the conventional slide-type busbar disconnector 6 is constructed by the rotating mechanism of the contacts 20, 41, the blade 31, the rotary shaft 26, the operating rod 29, and other blades 31. It is formed.

In this case, the disconnector 50 is the busbar bushing 1
Since it is provided directly behind the bushing 17 and integrally with the bushing 17, the gas-tight container 15 is provided as compared with the case where the conventional busbar bushing 3 and the disconnector 6 are separately provided in the upper and lower sections.
Can be formed into a small size by cutting at least the accommodation space (lower space) of the conventional disconnector 6.

Moreover, the rotary disconnector 50 is smaller and lighter than the slide disconnector 6 due to differences in blade movement. Then, when the gas hermetic container 15 is downsized, the amount of the gas also decreases as compared with the conventional case. Therefore,
It is smaller, lighter and cheaper than conventional equipment, and is easy to assemble and handle.

In the above embodiment, the clip contact 41 is brought into a non-contact state with the blade 31 by the cutting operation. However, the cutting operation causes the blade 31 to move from the state shown by the solid line in FIG. Alternatively, the hinge contact 20 may be brought into a non-contact state with the blade 31 by / 4 rotation.

[0025]

Since the present invention is configured as described above, it has the following effects. A rotary busbar disconnector 50 is formed by the disconnector hinge contact 20, the disconnector clip contact 41, the blade 31 attached to the rotary shaft 26, and the disconnector 50 is directly connected to the busbar bushing 17. The busbar bushing 17 and the busbar disconnector 50 are integrally provided in the closed container 15 without being divided, so that the gas closed container 15 can be made compact, lightweight, and the amount of gas can be reduced. Therefore, it is possible to provide a gas-insulated switchgear that is small, lightweight, inexpensive, and easy to assemble and handle.

[Brief description of drawings]

FIG. 1 is a cutaway plan view of an embodiment of the present invention.

FIG. 2 is a cut side view of FIG.

FIG. 3 is a plan view of the blade of FIG.

FIG. 4 is a cutaway side view of the disconnector hinge contact of FIG. 1.

5 is a cutaway side view of the disconnector clip contact of FIG. 1. FIG.

FIG. 6 is a cut side view of a conventional example.

[Explanation of symbols]

 15 Gas sealed container 17 Busbar bushing 18 Inner conductor 20 Disconnector hinge contact 26 Rotating shaft 31 Blade 41 Disconnector clip contact

Claims (1)

[Claims] 1. A busbar bushing provided penetrating a gas hermetic container, a disconnector hinge contact attached to a conductor of the busbar bushing in the gas hermetic container, and a position facing the disconnector hinge contact. A disconnector clip contact provided, a rotary shaft provided between the contacts and rotated by an inserting operation and a cutting operation, and a rotary shaft attached to the rotating shaft and integrally rotated, and contacting both contacts by an inserting operation. A gas-insulated switchgear, comprising: a semicircular blade that brings one of the contacts into a non-contact state by a cutting operation.