JPH05244710A - Gas insulated switchgear - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To provide a gas-insulated switchgear that is downsized in the direction of connection with a bus-side sealed container in a sealed container that constitutes a circuit breaker. [Structure] A closed container 32 that constitutes the circuit breaker 1 is formed in a rectangular shape, and a flange is directly formed on an upper portion on the side opposite to the cubicle 17A, and a cylindrical busbar side is sealed to this flange via an insulating spacer 22. By connecting the container 29 and the cylindrical cable head storage container 39 to the lower portion on the side of the anti-cubic 17A side, the axial length in the connecting direction of the closed container 32 and the bus line closed container 29 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, and more particularly to a gas-insulated switchgear in which a busbar-side sealed container, a cubicle or the like is connected to a sealed container which is filled with an insulating gas and which houses a blocking portion. Regarding the device.

[0002]

2. Description of the Related Art Generally, a gas-insulated switchgear is constructed by arranging each constituent device such as a circuit breaker in a closed container filled with an insulating gas such as SF ₆ gas to simplify the structure of the closed container. Various proposals have been made in order to limit the range of recovering the insulating gas at the time of inspecting the cutoff portion and the like. For example, in Japanese Patent Laid-Open No. 57-196812, a gas-insulation is constructed by partitioning the inside of a box-shaped common closed container with partition walls, and accommodating a circuit breaker, a main bus bar, a cable head, etc. in each partitioned location. An opening / closing device is described, and JP-A-60 is disclosed.
In Japanese Patent Publication No. 96111, a cylindrical sealed container containing a circuit breaker is welded with a cylindrical pipe extending in a direction perpendicular to the center line thereof, and the cylindrical sealed container is provided with an insulating spacer on the busbar side sealed container. A gas-insulated switchgear configured to house a cable head and a cable head is disclosed. Further, Japanese Patent Application Laid-Open No. 3-82308 discloses a gas-insulated switchgear configured by housing a circuit breaker, a main busbar, a cable head, etc. in a box-shaped common closed container without partitioning the gas. .

[0003]

However, JP-A-3-82308 and JP-A-57-1968 are mentioned above.
The gas-insulated switchgear disclosed in Japanese Patent No. 12 can be constructed in a small size as a whole, but the former has to collect all the insulating gas in the common closed container when inspecting a circuit breaker, for example. However, it is necessary to stop the operation of all equipment in this common closed container, and even if the inside of the box-shaped common closed container is partitioned by a partition like the latter, any equipment can be disassembled independently. It cannot be removed or replaced, and the work time required for these operations, that is, the power failure time, becomes long. In this respect, JP-A-60-96111
The gas-insulated switchgear disclosed in Japanese Patent Publication can disassemble each device independently by using an insulation spacer, which can shorten the power failure time. However, the gas-insulated switchgear has a cylindrical shape. A cylindrical tube extending in a direction perpendicular to the centerline is welded to the closed container, and the busbar side closed container is connected to this cylindrical pipe via an insulating spacer. It becomes large in size. An object of the present invention is to provide a gas-insulated switchgear that is downsized in the direction of connection with a busbar-side sealed container in a sealed container that constitutes a circuit breaker.

[0004]

In order to achieve the above-mentioned object, the present invention stores a busbar conductor via an insulating spacer in a closed container which is filled with an insulating gas and which constitutes a circuit breaker. In a gas-insulated switchgear formed by connecting bus-line side closed containers, at least a flat part is formed on the side of the closed container facing the bus-side closed container, and a flange is formed on this flat part, and the flange is insulated. The busbar side closed container is connected through a spacer.

[0005]

In the gas insulated switchgear according to the present invention, the busbar side and the closed side of the closed vessel having the circuit breaker as described above are made substantially flat, and a flange is formed on the flat surface. -Since the bus-line side closed container is connected via the connector, it is possible to omit the cylindrical tube conventionally required for the same part and reduce it axially by that amount, and to insulate, for example, when inspecting a circuit breaker. Since the spacer can be used in a state where at least the busbar side closed container side is sealed, the work time required for inspection and the like can be shortened.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. 2 and 3 are a front view and a plan view of a gas insulated switchgear according to an embodiment of the present invention. As shown in FIG. 2, box-shaped cubicles 17A, 17B, 17 are provided on the front side.
C is juxtaposed to form a row board, and the cubicle 1
7A is for power reception, cubicle 17C is for power consumption measuring device PCT, and cubicle 17B is for primary transformer. Behind each cubicle 17A, 17B, 17C, as shown in FIG. 3 which is a plan view, a rectangular airtight container 3 that constitutes a circuit breaker and the like and is filled with an insulating gas inside
2 are connected to each other, and an insulating spacer 22 is provided on the upper part on the back side.
A T-shaped busbar side closed container 29 made of a cylindrical tube is connected via the. The busbar side closed container 29 is configured with a predetermined axial length in the row board direction for each of the cubicles 17A, 17B and 17C, and the cubicles 17A, 17B, A main bus bar 4 extending in the row direction of 17C is formed. The structures of the cubicles 17A and 17B having the rectangular closed container 32, which is the main part, are substantially the same, and therefore the cubicle 17A is used as a representative example and its detailed structure is a longitudinal sectional view. Will be explained.

As shown in FIG. 1, the hermetically sealed container 32 is a rectangular prism having a substantially rectangular cross section in which at least opposing portions of the cubicle 17A and the main bus 4 are formed in a plane, and the lower portion thereof is a frame. It is supported by 36. A flange is directly or integrally formed by welding or the like at a portion of the rectangular hermetic container 32 facing the main bus bar 4, and the bus bar side hermetic container 29 is connected to the flange via an insulating spacer 22. There is. A handhole 37 is formed on the left side of the busbar-side closed container 29 that constitutes the main busbar 4, and the handhole 37 is always hermetically sealed by an end cover 38. A circuit breaker 1, for example, a puffer type circuit breaker is constructed in the closed container 32, and the breaker 1 is fixed to an inner wall of the closed container 32 via an insulating case 12. The upper terminal 40 of the circuit breaker 1 has a tu
A lip contact 42 is attached, and a tulip contact 13 is attached to the lower terminal 41 of the circuit breaker 1. An embedded conductor 43 of the insulating spacer 22 is connected to the tulip-shaped contactor 42.
As shown in FIG. 5, which is an enlarged view of a main part, a movable element 28 of the busbar-side disconnector 3 is always electrically connected and coupled to the other end of the connector so as to allow its rotation. The mover 28 is connected to a link mechanism 31 via an insulator, and then the link mechanism 31 is led out of the closed container 29, and further the closed container 2
9 is connected to an operating device 19A in the cubicle 17A shown in FIG. Inside the busbar side closed container 29, the post spacer 1
The main busbar conductors 10 for three phases are supported by 5 to form the main busbar 4. The stator 27 of the busbar side disconnector 3 is connected to the branch busbar conductors 26 of the main busbar conductors 10 for three phases. Has been done. The above-mentioned mover 28 faces the stator 27.
Thus, the mover 28 is driven by the operating device 19A so as to come into contact with and separate from the stator 27, and a ground terminal 48 constituting a ground switch 47 is provided at the open position thereof. Grounded at the open position. A portion of the closed container 32 that is located in the cubicle 17A has a detachable side wall 24, and the side wall 24 is always airtightly connected to the other portion. A substantially cylindrical cable head storage container 39 is connected to the lower portion on the back side of the closed container 32, and the left end of the storage container 39 is a handwheel 39a which is always hermetically sealed by an end lid 25. Are formed. The insulating case 12 is provided on the inner wall surface of the closed container 32 on the side wall 24.
Is attached, and the three-phase circuit breaker 1 arranged in parallel in the axial direction of the main bus conductor 10 is attached to the insulating case 12. The circuit breaker 1 is of a vertical type, and the movable part of the circuit breaker having the movable contactor is located below. Also the side wall 24
An operating device 18 for a circuit breaker is mounted inside the cubicle 17A on the back side of the operating device 18 and is connected to a movable part of the circuit breaker via a link mechanism 33 arranged below the circuit breaker 1. ing. The lower terminal of the circuit breaker 1
One end of the connection conductor 16 is connected via the lip-type current collector 13, and the other end of the connection conductor 16 is connected to the disconnector 44 and the conductor 4.
5 and a cable head 7 provided by a plurality of current capacities thereof and led to the outside of the container 39 by a cable 55. The connection conductor 16 is supported and fixed to an appropriate position of the storage container 39 by the post spacer 34, and the movable element 46 of the disconnector 44 is rotatably connected to the other end thereof.
The mover 46 is connected to one end of the link mechanism 56 via an insulator. The other end of the link mechanism 56 is the closed container 3.
2 Operation unit 19B that is led out to the outside of the cubicle 17A
The mover 46 is connected so that it can be opened and closed. The conductor 45 in the portion facing the mover 46 is
The stator 49 is attached, and thus the mover 45 is
Opening and closing operation of the operation device 19B brings the stator 49 into and out of contact,
Further, since the grounding terminal 51 which constitutes the grounding switch 50 is provided at the open position, the grounding is performed at the open position. Further, a grounding switch 52 and a voltage detector 53 are formed on the conductor 45 side, and the grounding switch 52 drives the mover 54 by the operating device 20 in the cubicle 17A to ground the conductor 45. ing. Storage container 3
The cable 55 derived from 9 is provided with a through-type current transformer 6 surrounding it. With such a configuration, when the circuit breaker 1 together with the side wall 24 is pulled out to the right in the figure, the circuit breaker 1 is separated by the tulip type current collectors 13 and 42, while the circuit breaker 1 is inserted into the closed container 32 side together with the side wall 24. , Circuit breaker 1
Will complete electrical contact with the tulip-type current collectors 13, 42.

According to the gas-insulated switchgear having the above-mentioned structure, the hermetically sealed container 32 has a rectangular shape which is flat at least on the side opposite to the main bus bar 4 opposite to the cubicle side, and a flange is formed directly on the facing portion to form an insulating space. -Because the main busbar container 29 is connected via the support, the closed container 3 of the same part as in the conventional case is used.
The cylindrical part formed in No. 2 is no longer necessary, and only that much is possible.
The width dimension of can be reduced. Further, since the airtight container 32 also has a planarly-opposed portion facing the cubicle 17A and connects the both, the size in the width direction can be further reduced. In addition, operating devices 18 and 19 of each switch
Since a, 19b and 20 are all housed in the cubicle 17A, they can be inspected from the cubicle 17A side. In particular, when the circuit breaker 1 together with the side wall 24 is pulled out from the cubicle 17A side to the right in the figure, the circuit breaker 1 is separated at the connection portion by the tulip type current collectors 13 and 42, while the side wall 24 and the circuit breaker 1 are sealed. 32
When inserted to the side, the circuit breaker 1 becomes a tulip type current collector 1
By making electrical contact with 3, 42, it becomes easy to inspect and replace the circuit breaker 1. Further, as for the maintenance and inspection of the main bus bar 4, the bus bar side disconnecting switch 3, the disconnecting switch 44, the ground switch 52, etc., since the entire width is reduced as described above, the end covers 25, 38 are removed and the handwheel is removed. Le 39a, 3
It can be easily performed from 7. Moreover, since the insulating spacer 22 is interposed between the closed container 32 that constitutes the circuit breaker 1 and the busbar-side closed container 29, the insulating spacer 22 is attached to either one side. Since the other device can be disassembled while the operation of the device on the one side is continued while the insulating gas is still being filled, the power outage time can be shortened.

FIG. 4 is a vertical sectional front view of a gas-insulated switchgear according to another embodiment of the present invention. This embodiment is called a double main bus system, in which two bus-side closed containers 29 are arranged vertically and are arranged substantially horizontally, and the post spacers 15 support the main bus conductors 10 for three phases therein. Then, the main buses 4 and 5 are formed. Busbar side closed container 2
At the left end of 9, a handhole 37 is formed, which is always airtightly sealed by an end cover 38, as in the previous embodiment, and at the right end, the busbar side disconnector 3 is connected via an insulating spacer 23. It is connected to the disconnector container 30 that constitutes it, and the anti-main bus side of this disconnector container 30 is hermetically sealed by an insulating spacer 22. The three-phase center conductors of the insulating spacer 23 are respectively connected to the three-phase main bus conductors 10 via the branch bus conductors 26, and in the disconnector container 30, the stator 2 is connected.
Connected to 7. A mover 28 is provided facing the stator 27, and the mover 28 is led out of the disconnector container 30 by a link mechanism 31 having an insulating rod.
Further, it is connected to an operating device 19a in the cubicle 17A by a link (not shown) provided outside the disconnector container 30, and the operating device 19a opens and closes the mover 28. The left end of the embedded conductor of the insulating spacer 22 is rotatably and constantly electrically connected to the mover 28. The configurations of the main bus 5 and the bus-side disconnector 2 are also exactly the same. A closed container 32 is arranged below the main busbars 4, 5 and the busbar-side disconnectors 2, 3, and the main busbar-side disconnectors 2, 3 in the closed container 32 are arranged.
The facing portion with respect to the cubicle 17A at least forms the facing portion in a plane, and the main busbar side disconnecting switches 2, 3 are provided.
There is a vertical portion 32b in which a flange is directly formed at a portion facing with. At the lower left end portion of the main buses 4, 5 in the closed container 32, a handwheel 32a that is always airtightly sealed by an end lid 25 is formed. The side wall 24 that is located inside the cubicle 17A and forms a part of the closed container 32 is
It is always airtightly connected to other parts, but is detachably connected so that it can be taken out from the cubicle 17A side to the right in the figure. The insulating case 12 is attached to the inner wall surface of the closed container 32 on the side wall 24, and the three-phase circuit breaker 1 juxtaposed in the axial direction of the main busbar conductor 10 is attached to the insulating case 12. .. The circuit breaker 1 is of a vertical type, and the movable part of the circuit breaker having the movable contactor is located below. An operating device 18 for the circuit breaker is mounted in the cubicle 17A on the back side of the side wall 24. The operating device 18 is a movable part of the circuit breaker via a link mechanism 33 arranged below the circuit breaker 1. Is linked to.
In this way, the upper portion of the circuit breaker 1 is arranged so as to face the upper wall of the closed container 32 through the gas space of the vertical portion 32b of the closed container 32. In the vertical portion 32b, the vertical conductors 11 are arranged almost vertically for each phase.
Is electrically connected to the mover 28 of the busbar side disconnectors 2 and 3 via the embedded conductor of the insulating spacer 22, and the lower end is above the circuit breaker 1 via the clip type current collector 14. It is connected to the terminal. One end of a connection conductor 16 is connected to the lower terminal of the circuit breaker 1 via a tulip type current collector 13, and the other end of the connection conductor 16 is provided with a plurality of cable heads 7 depending on its current capacity. It is led out to the outside of the hermetically sealed container 32 via a cable. This connecting conductor 16
Is supported and fixed at an appropriate position in the closed container 32 by a post spacer 34, and has a penetrating current transformer 6 in the middle thereof. Therefore, when the circuit breaker 1 is pulled out to the right in the figure together with the side wall 24, it is separated by the clip type current collector 14 and the tulip type current collector 13 provided at the lower end of the vertical conductor 11,
On the other hand, when the circuit breaker 1 is inserted into the closed container 32 side together with the side wall 24, the circuit breaker 1 is connected to the clip-type current collector 14 and the tug.
Since the electrical contact with the lip-type current collector 13 is completed, maintenance and inspection of the circuit breaker 1 can be performed externally.
As in the previous embodiment, a cubicle 17A is formed on the back side of the side wall 24 of the closed container 32, and an operation device for the circuit breaker 1 described above is provided in the cubicle 17A.
The operation device 19a of the main busbar side disconnectors 2 and 3, the operation devices 20 and 21 for the ground switches 8 and 9, and further each container 2
A pressure gauge (not shown) for monitoring the gas pressure inside 9, 30, 32 is housed. The grounding switch 8 grounds the lower terminal side of the circuit breaker 1, and is configured so that the connection conductor 16 and the cable head 7 can contact the connection conductor 35. The grounding switch 9 is located above the circuit breaker 1. The terminal side is grounded, and is configured to be capable of contacting the upper end of the vertical conductor 11, and the operating devices 20, 21 are respectively connected via link mechanisms (not shown).
It is operated by opening and closing.

The gas-insulated switchgear according to this embodiment is similar to the above-described embodiment in that the main container side of the hermetically sealed container 32 and the cure.
Since the facing portion with respect to the vehicle 17A is made flat, and in particular, the flange directly formed at the facing portion with the main bus bar is used to connect with the disconnector container 30 located on the main bus bar side, the length in this connecting direction is reduced. Further, since the closed container 32 connected between the disconnector container 30 and the cubicle 17A is the vertical portion 32b in which the circuit breaker 1 is shifted downward and only the vertical conductor 11 is arranged, the above-mentioned connection is further achieved. The length in the direction can be further shortened. In any of the above-described embodiments, the main busbar side of the closed container is configured to be planar, a flange is directly formed on the same portion, and the other closed container is connected to this flange via an insulating spacer. The width direction shown in the drawing can be reduced, and as a result, the left end portion of the main busbar and the left end portion of the container accommodating the cable head are substantially aligned with each other, thereby efficiently forming a small installation area as a whole. be able to.

FIG. 6 is a longitudinal sectional view of the essential parts of a gas-insulated switchgear according to a further different embodiment of the present invention. This drawing corresponds to FIG. 5, and the same reference numerals are given to the same parts, detailed description thereof will be omitted, and only different parts will be described. A tulip type current collector 60 is attached to the left end of the embedded conductor of the insulating spacer 22 in this embodiment, and the branch conductor 26 of the main busbar conductor 10 is directly connected via the tulip type current collector 60. Has been done. That is, compared with FIG. 5, the busbar side disconnector 3 is omitted. The present invention can be applied to the gas-insulated switchgear having such a configuration, and similar effects can be obtained. See also FIG.
With the configuration shown in FIG. 5, the axial length in the left-right direction in the drawing can be further reduced, and the main bus bar 4 of the closed container 32 described above can be reduced.
The width direction of the gas-insulated switchgear can be further reduced in combination with the configuration in which the opposing portion to and is planarized and the flange is directly formed on the same portion.

[0012]

As described above, according to the present invention, at least the portion of the closed container constituting the circuit breaker facing the main bus is made flat and a flange is directly formed on the flat portion, and the flange is provided on the main bus side. Since the closed container of is connected, the size in the connecting direction of the circuit breaker and the main bus bar can be reduced, and the time required for inspection etc. is shortened by using the insulating spacer to limit the collecting part of the insulating gas. can do.

[Brief description of drawings]

FIG. 1 is a front view in vertical section showing a main part of a gas-insulated switchgear according to an embodiment of the present invention.

FIG. 2 is a front view of a gas-insulated switchgear according to an embodiment of the present invention.

FIG. 3 is a plan view of the gas-insulated switchgear shown in FIG.

FIG. 4 is a vertical sectional front view of a main part of a gas insulated switchgear according to another embodiment of the present invention.

5 is an enlarged cross-sectional view of a main part of the gas-insulated switchgear shown in FIG.

FIG. 6 is an enlarged sectional view of an essential part of a gas-insulated switchgear according to still another embodiment of the present invention.

[Explanation of symbols]

 1 Breaker 2, 3 Bus-side disconnector 4, 5 Main bus 7 Cable head 10 Main bus conductor 11 Vertical conductor 13, 42 Tulip type current collector 17A, 17B, 17C Cubicle 22 Insulation spacer 29 Bus Airtight container 32 Airtight container

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Satoshi Miwada 1-1-1 Kokubuncho, Hitachi City, Ibaraki Prefecture Hitachi Co., Ltd. Kokubun Plant

Claims (5)

[Claims] 1. A gas-insulated switchgear in which a busbar-side hermetically-sealed container containing a busbar conductor is connected to a hermetically-sealed container, which is filled with an insulating gas and constitutes a circuit breaker, via an insulating spacer. At least a flat portion is formed on the side of the hermetic container facing the busbar-side hermetic container, a flange is formed on the flat portion, and the busbar-side hermetic container is connected to the flange via an insulating spacer. Gas-insulated switchgear characterized by. 2. A busbar-side sealed container containing a busbar conductor is connected to a hermetically sealed container, which is filled with an insulating gas and constitutes a circuit breaker, via an insulating spacer, and the busbar side of the hermetically sealed container is opposite to the busbar side. In a gas-insulated switchgear comprising a cubicle containing an operating device for opening and closing the circuit breaker on the closed container side, the closed container is a side opposite to the busbar-side closed container and the cubicle. , At least a flat portion, respectively, and the busbar side closed container is connected to the flange formed on the one flat portion via an insulating spacer,
A gas-insulated switchgear characterized in that the above-mentioned cubicle is connected to the other flat portion. 3. The gas-insulated switchgear according to claim 2, wherein the closed container is a rectangular container, and the busbar-side closed container is a cylindrical container. 4. The closed container according to claim 2, wherein the closed container is connected to the busbar closed container via an insulating spacer at an upper portion on the anti-cubicle side of the closed container. A gas-insulated switchgear characterized in that a cable head container is connected to the lower part. 5. The gas-insulated switchgear according to claim 4, wherein a handhole is formed at an end of the busbar-side closed container and the cable head storage container on the side opposite to the closed-closed container.