JP3202302B2 - Metal closed switchgear - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal-closed switchgear in which an insulating gas is sealed and a vacuum circuit breaker is housed in multiple stages.

[0002]

2. Description of the Related Art FIGS. 7 (a) and 7 (a) show front views of a conventional air-insulated metal-closed switchgear (hereinafter simply referred to as a switchgear) in which vacuum circuit breakers are housed in multiple stages. In FIG. 7 (b) showing a right side view of FIG. 7 (a), a handle 46a is provided on the front surface of a box 41 whose outer periphery is surrounded by mild steel plates.
A door 46 that is opened and closed with is attached, and on the rear surface of the box 41,
A back plate (not shown) is screwed.

A drawer unit 42a in which a drawer-type high-pressure vacuum circuit breaker 42 is drawn out is mounted in three stages vertically inside a box 41, and a movable main body on the rear end upper side of the vacuum circuit breaker 42 is mounted. The circuit terminal is connected to the front end of the upper fixed-side main circuit terminal of the drawer unit 42a by a disconnecting portion 49A. Similarly, the movable main circuit terminal on the lower rear end of the vacuum circuit breaker 42 is connected to the front end of the lower L-shaped fixed main circuit terminal on the lower stage of the drawer unit 42a by a disconnecting portion 49B of the same product as the disconnecting portion 49A. ing.

On the lower surface of the ceiling of the box 41, three insulators 45 are provided.
Are fixed at equal intervals in the front-rear direction. To these insulators 45, horizontal busbars 43 of strip copper plates disposed parallel to the left and right below the ceiling are fixed. On the left end of the rear end of the box 41, three vertical buses 44 are attached in parallel via an insulator (not shown) attached to an attachment plate (not shown),
The upper ends of these vertical buses 44 are connected to the horizontal buses 43 by strip copper plates, respectively, and the rear ends of the fixed-side main circuit terminals connected to the disconnecting portions 49A are connected to the vertical buses 44.

Also, on the right side of each drawer unit 42a,
The wound current transformers 51 are vertically mounted, and the lower terminals of these wound current transformers 51 are connected by conductors 52 to the lower ends of the fixed main circuit terminals on the lower side of each drawer unit 42a. The upper end of the wound current transformer 51 is connected to a compression terminal (not shown) attached to the upper end of a cable 50 that is raised from the right side of the installation floor of the box 41. Cable 50
Is supported by a cable support 47 attached to the right side of the box 41, and a zero-phase current transformer 48 through which each cable 50 passes is attached to the lower end of the box 41.

[0006]

However, in the switchgear constructed as described above, the mounting interval between the vacuum circuit breaker 42 and the wire-type current transformer 51 may be stuck on the surface during a long-term operation. Alternatively, since the size of the box must be large in consideration of the accumulated dust, the outer shape of the box increases, and the floor area of the installation location increases. In addition, especially in places where the installation environment is bad, frequently cut off the upstream circuit breaker to stop the load,
Since dust on the surface of the insulator of the main circuit device must be removed, not only maintenance is required, but also the load operation rate is reduced. Therefore, in particular, a switchgear installed in a substation in an urban area cannot cope with a switchgear having such a large installation area due to soaring land prices.

It is an object of the first, second, and third inventions to provide a gas-insulated switchgear capable of increasing the number of vacuum circuit breakers accommodated without increasing the installation area.

[0008]

According to a first aspect of the present invention, a vacuum circuit breaker and a vacuum circuit breaker are provided next to the vacuum circuit breaker in a box body in upper and lower stages.
In a metal-closed switchgear in which a plurality of sets of operation mechanisms for operating the vacuum circuit breaker are housed and a vertical bus bar connected to the vacuum circuit breaker is provided at a rear portion of the box body, an intermediate portion of the box body A plurality of sets of the vacuum circuit breaker and the operating mechanism are provided on the front surface of the partition so as to form a plurality of sets of the vacuum circuit breaker and the operating mechanism.
Provided so that the horizontal position of is alternately changed in the vertical direction,
The vertical bus is provided in the bus bar chamber, a disconnector for connecting the vacuum circuit breaker and the vertical bus is provided at the rear of the vacuum circuit breaker in the bus bar chamber, and an insulating gas is sealed in the bus chamber. I do.

According to a second aspect of the present invention, a plurality of sets of a vacuum circuit breaker and an operating mechanism for operating the vacuum circuit breaker are stored in a box body in multiple stages and connected to the vacuum circuit breaker at a rear portion of the box body. In a metal-closed switchgear provided with a vertical bus bar, a partition wall is provided on one side of a rear part of the box body to hermetically partition the box body into a busbar room and an equipment room, and the vacuum circuit is provided behind the partition wall on the equipment room side. The vacuum circuit breaker is provided with the partition wall.
The horizontal position alternates with the upper and lower pairs on the opposite side of
An operating mechanism is provided at the front of the vacuum circuit breaker, the vertical bus is provided at the bus bar chamber, and the vacuum circuit breaker and the vertical bus are provided at the rear of the vacuum circuit breaker in the bus chamber. And a disconnecting device for connecting the first and second buses, and an insulating gas is sealed in the bus bar chamber.

In a third aspect of the present invention, a vacuum circuit breaker and a vacuum circuit breaker provided next to the vacuum circuit breaker are provided in a box body in multiple stages.
In a metal-closed switchgear in which a plurality of sets of operating mechanisms to be operated are stored and a vertical bus bar connected to a vacuum circuit breaker is provided at a rear portion of the box body, a box body is connected to a bus bar room and equipment on one side of a rear portion of the box body. chamber a partition wall for partitioning airtightly provided, provided a vacuum circuit breaker in the rear of the equipment room side of the partition wall, the vacuum circuit breaker the
The horizontal position on the opposite side of the bulkhead is alternately
A disconnection connecting the vacuum circuit breaker and the vertical bus at a rear portion of the vacuum circuit breaker in the bus room, having an operation mechanism provided at a front portion of the vacuum circuit breaker; An insulating gas is sealed in the busbar chamber, and the height of the cable connection portion of the upper vacuum circuit breaker protruding from the partition wall is sequentially increased.

[0011]

According to the first, second and third aspects of the invention,
Cables can be connected from the front of the box, and each electric device can be downsized. Therefore, the number of vacuum circuit breakers stored in the box can be increased without increasing the installation floor area.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a gas-insulated switchgear of the first invention will be described below with reference to the drawings. FIG. 1 shows the first
1 is a perspective view showing the switchgear of the present invention, and FIG. 2 is an enlarged detail view of a partial longitudinal section of FIG.

In FIG. 1 and FIG. 2, a box 1A comprises an equipment room 6A on the front side of a partition plate 5A in the middle and a busbar room 7A on the rear side.
And a front door 1 at the front end of the equipment room 6A.
a is attached.

As shown in FIG. 2, circular holes 5a are formed at equal intervals in the left-right direction from the center near the upper end of the partition plate 5A to the left, and vertically in front of each hole 5a. Of the vacuum circuit breakers 2A to be described later, the rear part of the highest-class vacuum circuit breaker 2A is hermetically attached via an O-ring (not shown) attached to the outer peripheral front surface of each hole 5a. Below this vacuum circuit breaker 2A, through-type zero-phase current transformers 21 are respectively mounted on substantially Z-shaped mounting plates 21a vertically provided on the lower surface of the vacuum circuit breaker 2A.

At the rear of the vacuum valve 16 of the vacuum circuit breaker 2,
The front terminal 16a of the rear terminal 16a is connected, and the front terminal 16b of the vacuum valve 16 has an L-shaped one end extending forward, and the front end of the connection electrode 12 having a cylindrical recess formed at the front end and the lower end.
A is connected, and a cable connection portion 15A is formed by the insulating layer 17 on the outer periphery. The rear end of the insulated operation rod 13 penetrates through the rear front surface of the front terminal 16b, and the front end of the insulated operation rod 13 is a connecting portion 13a connected to an operation mechanism described later. The through-type current transformer 11 is inserted into the front terminal 16b at the rear of the cable connection portion 15A in advance. The vacuum valve 16, the rear terminal 16a, the front terminal 16b, the through-type current transformer 11, and the connection electrode 12A are integrally formed by an insulating layer 17 cast and formed of epoxy resin. A ground layer 18 indicated by a dotted line is provided on the surface, and a blind plug 19A (not shown) is detachably attached to the opening at the front of the connection electrode 12A.

The upper end of the cable 10 is connected to the lower end of the connection electrode 12A via a connection pipe (not shown), and the upper end of the cable 10 is insulated from the lower part of the connection electrode 12A by a fixture (not shown) attached to a jacket. Fixed to layer 17. The lower end of the cable 10 passing through the zero-phase current transformer 21 is housed in a cable pit (not shown) provided on the installation surface of the box 1A,
It is connected to a load (not shown). On the other hand, an insulating shaft 23 is provided at the rear of the partition plate 5A at the rear of the rear terminal 16a so as to be swingable, and the insulating shaft 23 has a blade of the disconnector 14 attached thereto.
The base end of 14a is attached and is in contact with the rear end of the rear terminal 16a via a contact portion (not shown).

On the other hand, on the upper surface of the ceiling plate of the box 1A, a T-shaped bushing 8 disclosed in Japanese Patent Application Laid-Open No. 60-160309 has a lower portion penetrated through the ceiling plate.
Are mounted at equal intervals diagonally from the front left side to the rear right side of the box 1A. The lower ends of these T-shaped bushings 8 are connected to the upper ends of conductors 4A vertically arranged at the rear of the box 1A. The conductors 4A are respectively fixed by a plurality of insulators (not shown) attached to the rear end of the box 1A. On the front surfaces of these conductors 4A, fixed contacts 14b are attached at positions behind the broods 14a by projecting the contact pieces forward.

At the upper end of the partition plate 5A, a round hole (not shown) is formed on the right side of each hole 5a shown in FIG. 2 in FIG. Of the mechanisms 3A, the uppermost operation mechanism 3A is fixed as shown in FIG. This operation mechanism 3
In A, a circuit breaker operating section (not shown) is housed at the front and a disconnector operating section (not shown) is housed at the rear. Of these, a link (not shown) on the output side of the circuit breaker operating unit is connected to the above-mentioned connecting unit 13a via an insulating shaft (not shown),
The output end of the disconnection section operation section is connected to the disconnection section operation section and the vacuum circuit breaker 2.
The right end of an insulating shaft 23 attached laterally to the back surface of the partition plate 5A behind A is connected via a bevel gear.

An operation mechanism 3A is mounted below the uppermost vacuum circuit breaker 2A, a vacuum circuit breaker 2A is mounted below the operation mechanism 3A, and an operation mechanism 3A is mounted below the operation mechanism 3A. ing. Similarly, a vacuum circuit breaker 2A is attached below the uppermost operation mechanism 3A,
Below this, an operation mechanism 3A and a vacuum circuit breaker 2A are sequentially attached, and as a result, the vacuum circuit breaker 2A and the operation mechanism 3A
Are in a staggered four-tiered configuration.

In the switchgear configured as described above, after the assembly is completed, an insulating gas such as sulfur hexafluoride gas is sealed in the bus box box 7A, and a power receiving power supply (not shown) adjacent to the box body 1A is provided. The cable is connected from the T-shaped bushing on the ceiling portion of the switchgear to the T-shaped bushing 8 attached to the upper surface of the ceiling of the box 1A, and from each disconnector 14 and each vacuum circuit breaker 2A via the cable 10. , Power is supplied to a load (not shown). When performing a withstand voltage test or insulation resistance measurement at the time of a shipping test or a periodic inspection, the blind plug 19A at the front end of the cable connection portion 15A is removed, and a test cable is connected.

The outer circumference of each vacuum circuit breaker 2A is covered with an insulating layer 17, so that the space between the upper and lower vacuum circuit breakers 2A and the space between the vacuum circuit breakers 2A and the right operating mechanism 3A can be reduced. The number of mounting stages of the vacuum circuit breaker 2A housed in the box 1A having a small floor area can be increased without increasing the outer shape of the box 1A. Further, by changing the mutual position of the vacuum circuit breaker 2A and the operating mechanism 3A adjacent to each other alternately in each of the vertically mounted sets, when the cable 10 is connected to the cable connecting portion 15A, Since the cable 10 connected to the vacuum circuit breaker does not get in the way, the cable connection work at the installation site is facilitated.

In the above embodiment, the equipment box 6A may be provided symmetrically behind the busbar box 7A, and the conductor 4A may be a common vertical busbar. In this case, although both sides are of a maintenance type, there is an advantage that the installation floor area can be further reduced by sharing the bus box 7A.

FIG. 3 is a partial longitudinal sectional view showing another embodiment of the switchgear of the first invention.
The front end of 16c forms a T-shaped cable connection portion 25.
Also in this case, a detachable blind plug 19B is attached to the upper end of the cable connection portion 25, and is used as a connection portion of a test cable when measuring the withstand voltage value or the insulation resistance value of the main circuit device. use.

FIG. 4 is a partial longitudinal sectional view showing another embodiment of the switchgear of the present invention. The front terminal 16d of the vacuum valve 16 slightly protrudes from the insulating layer 17, and
One side of a T-shaped bushing 35 is inserted and connected from the front of a frustoconical insulating layer formed around the 16d protrusion. In this case, since the work of connecting the test cable by removing the blind plug 19C on the front side can be performed from the front side, there is an advantage that the connection of the test cable of the uppermost vacuum circuit breaker becomes easy.

In the above embodiment, the case where the circuit breaker housed inside is a vacuum circuit breaker has been described.
A kV-class vacuum contactor may be used. In addition, the partition plate 5
The attachment surface of the operation mechanism 3 </ b> A may be depressed by bending in a letter shape. Further, the arrangement of the vacuum circuit breaker 2A and the operation mechanism 3A viewed from the front of the box may be reversed.

Next, one embodiment of the gas-insulated switchgear of the second and third inventions will be described. FIG. 5 is a perspective view showing the switchgears of the second and third inventions, and FIG.
It is a partial longitudinal cross-section enlarged detailed view.

5 and 6, the box 1B is composed of a rear left busbar box 7B and an equipment room 6B formed in an inverted L-shape by the busbar box 7B.
A front door (not shown) is attached.

FIG. 6 shows a partition plate 5B on the right side of the busbar room 7B.
As shown in FIG. 5, three circular holes 5a are formed at regular intervals in the front-rear direction, and these holes 5a are vertically arranged as shown in FIG. 5 and are each a vacuum circuit breaker 2B, 2C, 2D, 2 described later in detail.
E is provided at each rear side. An O (not shown) attached to the front of the outer periphery of each hole 5a is provided in front of each hole 5a.
The vacuum circuit breakers 2B, 2C, 2D, and 2E are hermetically attached via rings. Below these vacuum circuit breakers 2B, 2C, 2D, 2E, a through-type zero-phase current transformer 21 is mounted on the front end of a mounting plate 21b protruding from the front surface of the partition plate 5B.

At the top of the vacuum valve 16 of each vacuum circuit breaker,
The front end of the rear terminal 16e is connected, the lower terminal 16f of the vacuum valve 16 extends forward, and a connection electrode 12B having a cylindrical recess formed vertically is formed at the front end thereof. It is a connection part 15B. Lower terminal 16f
A rear end of the insulated operation rod 13 penetrates through a lower surface of the rear part, and a lower end of the insulated operation rod 13 is a connecting portion 13a connected to an operation mechanism described later. The lower terminal 16f is provided with a through current transformer 11 in advance at the rear of the cable connection portion 15B.
Is inserted. These vacuum valve 16, upper terminal 16
e, lower terminal 16f, through current transformer 11 and connection electrode 12B
Is integrated with an insulating layer 17 cast and formed of epoxy resin, and a ground layer 18 is provided on the surface of the insulating layer 17,
In the opening above the connection electrode 12B, a blind plug 19 (not shown) is omitted.
D is detachably attached.

The upper end of the cable 10 is connected to the lower end of the connection electrode 12B via a connection pipe (not shown), and the upper end of the cable 10 is insulated from the lower part of the connection electrode 12B by a fixture (not shown) attached to the jacket. Fixed to layer 17. cable
The lower end of 10 is housed in a cable pit (not shown) formed on the installation surface of the box 1B, and is connected to a load (not shown). On the other hand, the upper terminal 16e is provided inside the partition plate 5B.
An insulating shaft 23 is swingably provided in the front-rear direction on the rear part. The base end of the blade 14a of the disconnector 14 is attached to the insulating shaft 23, and the rear end of the upper terminal 16e is connected via a contact part (not shown). Is in contact with

Here, the vacuum circuit breakers 2B, 2C, 2D and 2E mounted at equal intervals in the vertical direction have the same position from the partition plate 5B of each vacuum valve 16, but are located in front of each vacuum circuit breaker. The protruding front end of a cable connecting portion 15B, which will be described later, has a different protruding height. Further, operation mechanisms 3B, 3C, 3D, 3
The same applies to E. Further, as shown in FIG. 5, the position of the cable connection portion 15B in the front-rear direction is such that the vacuum interrupters 2B and 2D are at the rear and the vacuum circuit breakers 2C and 2E are at the front.

On the other hand, on the upper surface of the ceiling plate of the box 1B, a T-shaped bushing 8 shown in JP-A-60-160309 is attached at regular intervals in the front-rear direction with the lower portion penetrating the ceiling plate. The lower ends of these T-shaped bushings 8 are connected to the upper ends of conductors 4B vertically arranged in the bus bar 7B of the box 1B, respectively, and these conductors 4B are attached to the rear end of the box 1B. Each is fixed by a plurality of insulators (not shown). On the right side of these conductors 4B, each blue 14
A fixed contact 14b is attached to a position on the left side of FIG.

Electric operating mechanisms 3B, 3C, 3D, 3E, which are not shown in detail, are fixed to the front surface of each vacuum circuit breaker as shown in FIG. Each of these operating mechanisms includes:
A circuit breaker operation unit (not shown) is housed at the rear, and a disconnector operation unit (not shown) is housed at the front. Of these, a link (not shown) on the output side of the circuit breaker operation unit is connected to the above-described connecting unit 13a, and the output end of the disconnection unit operation unit is connected to the disconnector operation unit and the left partition plate 5B of each vacuum circuit breaker. It is connected to the front end of an insulating shaft 23 mounted laterally on the rear surface via a bevel gear.

In the switchgear configured as described above, after assembling is completed, for example, an insulating gas such as sulfur hexafluoride gas is sealed in the busbar box 7B, and a power receiving power supply (not shown) adjacent to the box 1B. By connecting a cable from the T-shaped bushing at the ceiling of the switchgear to the T-shaped bushing 8 attached to the ceiling of the box 1B, the cable is connected from each disconnector 14 and each vacuum circuit breaker via the cable 10, Power is supplied to a load (not shown). Also, when performing a withstand voltage test or insulation resistance measurement during a shipping test or periodic inspection,
The test plug is connected by removing the blind plug 19D at the upper end of the cable connection portion 15B.

The outer periphery of each vacuum circuit breaker has an insulating layer 17.
Since it is possible to reduce the mounting interval between the upper and lower vacuum circuit breakers and the front operation mechanism,
Without increasing the outer shape of the box 1B, it is possible to increase the number of mounting stages of the vacuum circuit breaker accommodated in the box having a small floor area.
Further, the positions of the upper and lower cable connection portions 15B are sorted back and forth, so that the cables 10 connected to the respective vacuum circuit breakers are separated.
In particular, since the terminal processing is facilitated, the connection work of the cable 10 at the installation site is facilitated.

In the above embodiment, the equipment box 6B may be symmetrically connected to the left side of the bus box 7B so that the conductor 4B may be a common vertical bus. In this case, although both sides are of a maintenance type, there is an advantage that the floor space for installation can be further reduced by sharing the bus room 7B. Further, as shown in FIGS. 3 and 4 shown in the first invention,
The cable connection part may be configured as shown in FIGS. 3 and 4.

In the above embodiment, the case where the circuit breaker housed therein is a vacuum circuit breaker has been described. However, as in the first invention, for example, a vacuum contactor of 6.6 kV class may be used.
Further, the partition plate 5 may be bent in a Z-shape to make the mounting surface of the operation mechanism 3 concave.

[0038]

As described above, according to the first aspect of the present invention, the vacuum circuit breaker and the vacuum circuit breaker are provided next to the vacuum circuit breaker in the upper and lower multi-stages in the box body.
In a metal-closed switchgear in which a plurality of sets of operating mechanisms for operating the vacuum circuit breaker are housed and a vertical bus bar connected to the vacuum circuit breaker is provided at a rear portion of the box body, an intermediate portion of the box body A plurality of sets of the vacuum circuit breaker and the operating mechanism are provided on the front surface of the partition so as to form a plurality of sets of the vacuum circuit breaker and the operating mechanism.
Provided so that the horizontal position of is alternately changed in the vertical direction,
By providing the vertical bus in the bus chamber, providing a disconnector for connecting the vacuum circuit breaker and the vertical bus at the rear of the vacuum circuit breaker in the bus chamber, and filling the bus chamber with an insulating gas, thereby providing a cable. Can be connected from the front of the box, and each electrical device can be downsized.Therefore, a metal-closed switchgear that can increase the number of vacuum circuit breakers stored in the box without increasing the installation floor area Obtainable.

According to the second aspect of the present invention, the vacuum circuit breaker and the operating mechanism for operating the vacuum circuit breaker in a multistage manner in the box body.
A metal-closed switchgear in which a plurality of sets are stored and a vertical bus bar connected to the vacuum circuit breaker is provided at a rear portion of the box body. a partition wall partitioning airtightly provided in the chamber, the vacuum circuit breaker is provided in the rear of the equipment room side of the partition wall, the vacuum interrupter
The container is a set of upper and lower horizontal positions on the opposite side of the bulkhead.
It has an alternately connected cable connection portion , an operation mechanism is provided at the front of the vacuum circuit breaker, the vertical bus is provided at the bus bar room, and the vacuum circuit breaker is provided at the rear of the vacuum circuit breaker of the bus room. By providing a disconnector for connecting the vertical bus, and by filling the bus chamber with an insulating gas, connection of cables is enabled from the front of the box, and each electric device can be downsized. It is possible to obtain a metal-closed switchgear that can increase the number of vacuum circuit breakers housed in the box without increasing the number.

Further, according to the third aspect of the present invention, the vacuum circuit breaker and the vacuum circuit breaker provided next to the vacuum circuit breaker are provided in the box body in multiple stages.
In a metal-closed switchgear in which a plurality of sets of operating mechanisms for operating the vacuum circuit breaker are housed and a vertical bus bar connected to the vacuum circuit breaker is provided at a rear portion of the box body, a box body is provided at one rear side of the box body. Is provided in the bus room and the equipment room in a gas-tight partition, a vacuum circuit breaker is provided behind the partition on the equipment room side, and the vacuum circuit breaker has a lateral position on the side surface on the opposite side of the partition wall.
It has a cable connection part that alternates with the upper and lower sets , an operating mechanism is provided at the front of the vacuum circuit breaker, a vertical bus is provided in the bus bar room, and this is provided at the rear of the vacuum circuit breaker in the bus room. A disconnector that connects the vacuum circuit breaker and the vertical bus is provided, the insulating gas is sealed in the bus chamber, and the cable connection part of the upper vacuum circuit breaker is protruded from the partition wall in order to increase the height of the cable connection. Since it is possible to reduce the size of each electrical device by making it possible from the front of the box, it is possible to obtain a metal-closed switchgear that can increase the number of vacuum circuit breakers stored in the box without increasing the installation floor area. it can.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of a metal-closed switchgear of the first invention.

FIG. 2 is a partial longitudinal sectional view of FIG.

FIG. 3 is a partial longitudinal sectional view showing another embodiment of the metal-closed switchgear of the first invention.

FIG. 4 is a partial longitudinal sectional view showing another embodiment different from FIG. 3 of the metal-closed switchgear of the first invention.

FIG. 5 is a perspective view showing an embodiment of the metal-closed switchgear of the second and third inventions.

FIG. 6 is a partial longitudinal sectional view of FIG. 5;

7A and 7B are views showing an example of a conventional metal-closed switchgear, in which FIG. 7A is a front view and FIG. 7B is a right side view.

[Explanation of symbols]

1A, 1B ... box body, 2A, 2B, 2C, 2D, 2E ... vacuum circuit breaker, 3A, 3B, 3C, 3D, 3E ... operation mechanism,
4A, 4B ... conductor, 5A, 5B ... partition plate, 6A, 6B ...
Equipment box, 7A, 7B ... busbar box, 8 ... T-shaped bushing, 10
... Cable, 11 ... Wired current transformer, 12A, 12B ... Connection electrode, 14 ... Disconnector, 15A, 15B ... Cable connection part, 21 ... Zero phase current transformer.

Continuing from the front page (72) Inventor Masaki Ikuta 1 Toshiba-cho, Fuchu-shi, Tokyo In the Toshiba Fuchu factory (72) Inventor Tetsuo Yoshida 1-Toshiba-cho, Fuchu-shi, Tokyo In the Fuchu factory Toshiba (72 Inventor Masazumi Shiraishi 1 Toshiba-cho, Fuchu-shi, Tokyo Inside the Fuchu Plant, Toshiba Corporation (72) Inventor Yasufumi Nagata 1-1-1, Shibaura, Minato-ku, Tokyo Inside the head office of Toshiba Corporation (56) Reference Document JP-A-5-151187 (JP, A) JP-A-5-30615 (JP, A) JP-A-58-119716 (JP, A) JP-A-2-65607 (JP, A) 90907 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) H02B 1/20 H02B 1/32 H02B 13/02

Claims (3)

(57) [Claims] 1. A vacuum circuit breaker and the true
Operation for operating the vacuum circuit breaker provided beside the empty circuit breaker
In a metal-closed switchgear in which a plurality of sets of mechanisms are housed and a vertical bus bar connected to the vacuum circuit breaker is provided at a rear part of the box body, the box body is provided at an intermediate part of the box body with a device in front thereof. A partition wall is provided in the room and the rear busbar room to provide airtight partitioning.
A plurality of sets of the vacuum circuit breaker and the operating mechanism are alternately arranged on the front surface of the partition wall in a vertical direction.
The bus bar chamber is provided with the vertical bus bar, a disconnector for connecting the vacuum circuit breaker and the vertical bus bar is provided at the rear of the vacuum circuit breaker in the bus bar chamber, and an insulating gas is provided in the bus bar chamber. A metal-closed switchgear characterized by encapsulation. 2. A vacuum circuit breaker and said vacuum circuit breaker are provided in a box body in upper and lower multi- stages.
In a metal-closed switchgear in which a plurality of sets of operation mechanisms for operating the empty circuit breaker are housed and a vertical bus bar connected to the vacuum circuit breaker is provided at a rear part of the box body, one side of a rear part of the box body is provided. A partition that hermetically partitions the box into a busbar room and an equipment room is provided, and the vacuum circuit breaker is provided behind the partition on the equipment room side, and the vacuum circuit breaker is provided on the opposite side of the partition.
Cable connection where the horizontal position alternates with the upper and lower sets on the surface
It has a connecting part, and an operating mechanism is provided at a front part of the vacuum circuit breaker,
The vertical bus is provided in the bus chamber, and a disconnector for connecting the vacuum circuit breaker and the vertical bus is provided at a rear portion of the vacuum circuit breaker in the bus chamber, and an insulating gas is sealed in the bus chamber. Closed metal switchgear. 3. The metal-closed switchgear according to claim 2, wherein the projecting height of the cable connection portion of the upper vacuum circuit breaker from the partition wall is sequentially increased.