JPH0522815A - Gas insulated switch - Google Patents

Abstract

PURPOSE:To provide a gas insulated switch which can be manufactured without handling a large-sized outer vessel and can be cope with when an accidents occurs merely by replacing only one part. CONSTITUTION:An outer vessel 11, which stores the constituent equipment of a gas insulated switch, is divided into an upper vessel 14, a middle vessel 15, and a lower vessel 16, and the constituent equipment is stored in these three vessels 14, 15, and 16, being portioned out. A casing 13, which constitutes a panel 12, is divided into an upper casing 17, a middle casing 18, and a lower casing 19, and equipment, which constitutes the panel, is stored in these three casings 17, 18, and 19, being portioned out.

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 which constitutes a switchgear circuit for connecting a line and a bus bar.

[0002]

2. Description of the Related Art As a gas-insulated switchgear used in a power receiving facility such as a building, as shown in FIG. 9, a cable head CHd for pulling in a cable constituting a feeder, a bus bar conductor BUS, a cable head and a bus bar conductor. The switchgear arranged between the two is housed in a rectangular parallelepiped outer shell container 1 in which an insulating gas (SF ₆ gas) is enclosed to form the main body 2 of the switchgear, and A panel 4 is constructed by accommodating operating devices and instruments for operating the components in the box body 3, and the switchgear body 2 and the panel 4 are arranged adjacent to each other.
There is one that constitutes the gas-insulated switchgear U of the unit.
The inside of the outer shell container 1 is partitioned into two upper and lower chambers by a partition wall 1a, and an insulating spacer S is attached to the partition wall 1a, and the upper and lower two chambers are gas-divided by the insulating spacers.

When the power receiving equipment is provided with a plurality of units U, the plurality of units U are connected to the respective boards 4
Are arranged side by side in a state of forming a so-called row board by arranging them in a line, and the bus bar conductors BUS of adjacent units U are connected to each other to form a bus bar.

[0004]

In the conventional gas-insulated switchgear, since one large-sized outer shell container 1 which is long in the vertical direction is used and all the devices are housed in the outer shell container 1, It required a large crane to lift the outer shell container during processing and assembly. Generally, there is not a large number of large cranes installed in a factory, so there is a problem in that a waiting time becomes long in a process requiring a large crane and manufacturing efficiency decreases.

Further, in the conventional gas-insulated switchgear, since the equipment is housed in one outer shell container, it is not easy to change the arrangement of the equipment inside the container, and it is possible to cope with various skeleton configurations. There was a problem that it was difficult.

Further, since a large-sized outer shell container is used, it is inevitable that the equipment cost will be high and the manufacturing cost will be high when it is produced by a line work.

Further, in the conventional gas-insulated switchgear, since it is necessary for a person to enter the outer shell container to assemble the equipment, not only the assembly workability is poor, but also dust may enter the container. There is a possibility that the reliability of the insulation may be deteriorated due to the increase.

Furthermore, in the conventional gas-insulated switchgear,
It was uneconomical because it was necessary to replace the entire unit when an internal accident occurred.

An object of the present invention is to provide a gas-insulated switchgear that can be efficiently assembled without using a large crane or the like.

Another object of the present invention is to provide a gas-insulated switchgear that can easily accommodate various skeleton configurations.

Still another object of the present invention is to provide a gas-insulated switchgear capable of facilitating assembly by flow work and improving manufacturing efficiency.

Still another object of the present invention is to eliminate the necessity of assembling all the devices in the outer shell container, to facilitate the assembly, reduce the chances of invasion of dust and the like, and improve the reliability of insulation. It is to provide a gas-insulated switchgear that can be increased.

Still another object of the present invention is to provide a gas-insulated switchgear capable of coping with an internal accident by replacing a part of the accident.

[0014]

SUMMARY OF THE INVENTION According to the present invention, a component including a cable head, a bus conductor, and a switchgear provided between the cable head and the bus conductor is provided in an outer shell container in which an insulating gas is sealed. A gas-insulated switchgear in which the switchgear body is housed inside the switchgear, and the operating unit and instruments for operating the components inside the outer shell container are housed inside the box and the panel is located adjacent to the switchgear unit. Related to.

In the present invention, the outer shell container is divided into an upper container, an intermediate container and a lower container, and the boxes constituting the board are an upper box, an intermediate box and a lower box. Three
An upper element container that is divided and has an upper container and an upper box body integrated, an intermediate element container that has an intermediate container and an intermediate box body integrated, and a lower part that has a lower container and a lower box body integrated. An element container is configured.

The devices to be housed in the outer shell container are distributed to and housed in an upper container, an intermediate container and a lower container, and the devices constituting the board are an upper box, an intermediate box and a lower box. The upper element, the intermediate element, and the lower element are configured by being sorted and housed.

The intermediate element is stacked on the lower element, and the upper element is stacked on the intermediate element. The lower container and the intermediate container and the intermediate container and the upper container are hermetically sealed. It is detachably connected by a holding structure.

In the above-mentioned structure, the whole is divided into three, but the whole may be divided into upper and lower parts. In this case, the outer shell container is divided into two parts, an upper container and a lower container, and a box constituting the board is divided into an upper box and a lower box.
An upper element container in which the upper container and the upper box are integrated and a lower element container in which the lower container and the lower box are integrated are configured by being divided.

The devices to be housed in the outer shell container are distributed and housed in the upper container and the lower container, and the devices constituting the board are distributed and housed in the upper and lower boxes. And a lower element.

In a state where the upper element is stacked on the lower element, the lower container and the upper container are releasably connected by an airtight holding structure.

[0021]

As described above, when the outer shell container and the box body of the board are divided into a plurality of parts, it is not necessary to lift the large outer shell container at the time of assembly, so that it is efficient without using a large crane or the like. Assembly can be done.

Further, with the structure in which a plurality of elements are connected as described above, various skeleton structures can be easily accommodated by changing the structure of each element.

Further, as described above, when the element is divided into a plurality of elements, it is not necessary to handle a large-sized container, so that the assembly by the flow work can be facilitated and the manufacturing efficiency can be improved.

Further, with the above construction, it is not necessary for a person to enter the outer shell container to perform the assembly work, so that the assembly can be facilitated and the chances of dust and the like entering can be reduced. The reliability of insulation can be improved.

Further, by dividing into a plurality of elements as described above, it is not necessary to replace the entire element when an accident occurs inside, and it is possible to deal with it by only replacing the element where the accident has occurred. It is economical.

[0026]

1 to 3 show an embodiment of the present invention, in which FIG. 1 is a simplified vertical sectional side view and FIG. 2 is a front view. 3A is a top view of the upper element,
(B) thru | or (D) are side surface longitudinal cross-sectional views of an upper element, an intermediate | middle part element, and a lower element, respectively.

In these figures, 10 is a switchgear main body in which the components are housed in an outer shell container 11 having a rectangular parallelepiped shape as a whole, and 12 is a box body 1 having a rectangular parallelepiped shape as a whole.
It is a panel in which operating devices and instruments are housed in 3.

The outer shell container 11 is divided into an upper container 14, an intermediate container 15 and a lower container 16, and the box 13 is divided into an upper box 17, an intermediate box 18 and a lower box 19. ing. Then, the upper container 14 and the upper box body 17 are integrally connected in a state where they are arranged adjacent to each other to form the upper element container 20. Similarly, the intermediate container 15
The intermediate box body 18 is integrated to form an intermediate element container 21, and the lower container 16 and the lower box body 19 are integrated to form a lower element container 22.

The upper container 14 has handholes 14a1 and 14a2 on its upper surface and rear surface, respectively, and these handholes are hermetically closed by lid plates 14b1 and 14b2. The bottom of the upper container 14 has an opening 14a3
Are provided, and positioning projections 14c projecting downward are provided in front of and behind the bottom surface.

The upper box body 17 is formed in a rectangular parallelepiped shape, and is arranged with its back surface being in contact with the front surface of the upper container 14 and connected to the upper container 14. As shown in FIG. 3A, the width dimension of the upper box body 17 is determined by the upper container 14
Is set larger than the width dimension of the upper box body 17 and the upper container 17 and the upper container 17 are arranged with their side surfaces on one end side in the width direction on the same plane. Therefore, the other end side of the upper box body 17 in the width direction is arranged so as to protrude from the side surface side of the other end side of the upper container 14 by a certain dimension.
A space S for accommodating the operation mechanism is formed on the back side of the portion of the container 7 that protrudes from the upper container 14. Ears 14d are provided so as to project in the horizontal direction from both ends of the lower portion of the side surface of the upper container 14, and holes are provided in each of the ears for passing bolts.

In the upper container 14, a three-phase bus bar BU
S, a bus-side disconnector DS2, and a grounding switch ES2 are housed. The three-phase bus bar conductor BUS extends in parallel to the direction perpendicular to the paper surface of FIG. 3B, and is an insulating spacer 25 provided so as to hermetically close the opening provided on the opposite side surface of the container 14. Is supported in an airtight manner. The busbar conductor BUS is also supported on the container 14 by an insulating support 26, and the busbar conductor BUS of each phase is provided.
A fixed contact 28 of the disconnecting switch DS2 of each phase is connected to the connector via a connecting conductor 27. Fixed contactor for 3-phase disconnector 2
8 are arranged side by side in a direction perpendicular to the paper surface of FIG. On the front side of the upper container 14, fixed contacts 29 of a three-phase grounding switch ES2 are mounted side by side in a direction perpendicular to the plane of the drawing.

30 is a disconnecting switch DS2 and a grounding switch ES2
The movable contactor 30 is provided in common with the movable contactor 30. The movable contactor 30 is rotatably supported by a conductor 32 supported on the inner surface of the upper container 14 via an insulating support 31. One end of the rotary shaft 30a of the movable contact 30 has the upper container 1a.
4 is penetrated through the side surface and led to the outside. One end of the conductor 32 supported by the insulating support 31 has the upper container 1
4 extends to the center of the opening 14a3 on the bottom surface of No. 4, and one end of the conductor 32 is provided with a connecting portion 33 connected to a through conductor of an insulating spacer described later.

In the upper box 17, an operating device 34 for operating the movable contacts 30 of the disconnecting switch DS2 and the earthing switch ES2.
And a control panel 34 'to which relays and instruments are attached. The operation unit 34 is connected to the rotating shaft 30a of the movable contact 30 via a connecting mechanism 36 including a link and a lever. The movable contact 30 is operated by the operating unit 34 to be in a closed position where it contacts the fixed contact 28, and an open position where it does not contact either of the fixed contacts 28 and 29.
It rotates between the fixed contactor 29 and the grounding position in contact with it.

The upper element container 20 composed of the upper container 14 and the upper box 17 and the equipment housed in the container constitute the upper element Ea.

The intermediate part container 15 has insulating spacer mounting holes 15a1 for three phases on the upper surface and three conductor through holes 15a2 on the bottom surface.
I have a share. A hand hole 15a4 is provided on the back surface of the intermediate container 15, and a three-phase circuit breaker mounting hole 15a5 is provided on the front surface.
Are provided respectively. 3-phase circuit breaker mounting hole 15
Although a5 is arranged side by side in the direction perpendicular to the paper surface of the figure,
The three-phase conductor through holes 15a2 are provided in a triangular arrangement in order to facilitate the arrangement of the current transformer CT described later.

Positioning protrusions 15c protruding downward are provided at the front and rear of the bottom surface of the intermediate container 15. The upper portion of the intermediate container 15 has the positioning protrusion 1 of the upper container 14.
It is positioned with respect to the upper container 14 while being fitted inside 4c.

Insulating spacer mounting hole 1 of the intermediate container 15
An insulating spacer 35 is attached so as to hermetically close 5a1. A conductor connecting portion is provided on the upper end of the through conductor 35a of the insulating spacer 35, and when the upper container 14 is placed on the intermediate container 15 and the two containers are joined, the upper end of the through conductor 35a of the insulating spacer 35 is provided. The connection portion 33 provided on the conductor 32 of the upper element is connected.

The circuit breaker CB is mounted with its one end fitted in the circuit breaker mounting hole 15a5, and one terminal of the circuit breaker of each phase is connected to the lower end of the through conductor 35 of the insulating spacer via the connecting conductor 36. It is connected to the. The current transformer CT is attached so as to be aligned with the conductor through holes 15a2 of each phase of the intermediate container 15, and the conductor 37 is provided so as to penetrate the inside of the current transformer CT of each phase and the conductor through holes 15a2. . Conductor 37 of each phase
Is connected to the other terminal of the circuit breaker CB of each phase via the connection conductor 38. The hand hole of the intermediate container 15 is airtightly closed by a cover plate 15b.

The back surface of the intermediate box 18 has the intermediate container 1
The intermediate part container 15 and the intermediate part box body 18 form an intermediate part element container 21 by being connected to and integrated with the intermediate part container 15 in a state of being fitted to the front surface of the container 5. In the middle box 18, an operating device 40 for operating the circuit breaker CB and an operating device 4 for operating the earthing switch ES2 in the upper element
1 and an operating device 42 for operating a grounding switch ES1 in the lower element, which will be described later, are housed.

As shown in FIG. 5, an ear portion 15d similar to the ear portion 14d provided on the upper container 14 has an intermediate portion container 1
5 are provided at both upper ends and lower ends of the side surface, respectively, and by connecting the ears 14d of the upper container 14 and the corresponding ears 15d of the intermediate container 15 with bolts, the upper container 14 and the intermediate container are connected. It is designed to connect with 15.

A packing 43 is provided on the periphery of the upper surface of the intermediate container 15, and the packing keeps the connecting portion between the upper container 14 and the intermediate container 15 airtight. In addition, the circuit breaker mounting flange and the intermediate container 1
5 is provided with a packing 44, and the packing keeps the air-tightness of the mounting portion of the circuit breaker.

The intermediate element container 21 and the equipment housed in the container constitute an intermediate element Eb.

The lower container 16 has an open upper end, and a base B is integrally provided at the lower end. A three-phase cable head CHd is attached so as to hermetically close a hole provided in the lower part of the back surface of the lower container 16, and the fixed contactor 45 of the disconnector DS1 is connected to the terminal of the cable head. To the cable head CHd, a connector 52 provided at a terminal portion of a cable forming the feeder is inserted and connected.

A ground switch ES is provided on the front side of the lower container 16.
One fixed contact 46 is attached. Lower container 16
In addition, a three-phase conductor 49 is provided via insulating supports 47 and 48.
Is supported by the conductor 49 of each phase and the intermediate element Eb
A conductor connecting portion 50 for connecting the through conductor 37 of is provided. The conductor 49 also rotatably supports a movable contactor 51 common to the disconnector DS1 and the ground switch ES1. The rotary shaft of the movable contactor 51 is airtightly penetrated through the side surface of the lower container 16 to be led out to the outside, and is connected to the operation shaft of the operation device 42 through an appropriate connection mechanism.

The lower box body 19 has a back surface of the lower container 16
The lower box 19 and the lower container 16 form a lower element container 22. In the lower box body 19, a grounding wire or the like for grounding the fixed contactor 46 of the grounding switch ES1 is arranged.

The lower element container 22 and the devices arranged therein constitute a lower element Ec.

The lower container 16 has the upper end at the middle part container 1.
By being fitted inside the positioning protrusion 15c of No. 5, the positioning is performed with respect to the intermediate container 15. As shown in FIG. 5, ears 16d corresponding to the lower ears 15d of the intermediate container 15 are provided at both ends of the upper portions on the left and right side surfaces of the lower container 16, and the ears 16d are provided in the intermediate container. The lower container 15 is fastened to the lower ear portion 15d of the lower portion 15 with a bolt.
6 and the intermediate container 15 are connected.
In this manner, the through conductor 37 of each phase is connected to the conductor connecting portion 50 in the state where the lower container 16 is connected to the intermediate container 15. A packing 53 is provided on the periphery of the upper surface of the lower container 16, and the packing keeps the connecting portion between the lower container and the intermediate container airtight.

Upper element Ea, intermediate element E
b and the lower element Ec are connected to each other, SF is placed in the upper container 14, the middle container 15 and the lower container 16.
₆ Gas is filled at a specified pressure.

The upper box body 17, the intermediate box body 18, and the lower box body 19 are integrated by connecting adjacent box bodies inside each other with a connecting tool such as a bolt.

When a plurality of units U are provided, as shown in FIG. 4, a plurality of units are arranged side by side in a state where the boards 12 are located on the same side and aligned in a line. Busses BUS of adjacent units are connected to each other via a conductor (not shown). The connecting portion of the busbars of the adjacent units is the upper element E of the adjacent units.
It is arranged in a bellows container 60 provided between a and Ea.

As described above, when the outer shell container 10 and the box body 13 of the board 12 are divided into three, it is not necessary to lift the large outer shell container during assembly, so that a large crane or the like is not used. It can be assembled efficiently. Further, since it is not necessary to handle a large-sized container, it is possible to facilitate assembly by a flow work and improve manufacturing efficiency. Furthermore, if the element is divided into three elements as described above, it is not necessary to replace the entire element when an accident occurs inside, and it is possible to deal with it by only replacing the element where the accident occurs.

As described above, the three elements Ea ...
With the structure in which Ec is connected, various skeleton configurations can be easily accommodated by changing the configuration of each element.

For example, in the middle element, FIG.
As shown in, the circuit breaker CB and the current transformer CT can be replaced with each other.

As shown in FIG. 7A, the lightning arrester LA is provided next to the cable head in the lower element Ec.
Alternatively, the grounding switch ESo may be added. Further, as shown in FIG. 7B, the lower element E
In c, the cable head CHd for attaching the cable head CHd to the bottom wall portion of the container 16 or applying a test voltage at the time of withstanding voltage test next to the cable head CHd.
It is also possible to add a ‘′ or a voltage transformer VT.

In the above embodiment, the whole is divided into three,
As shown in FIG. 8, the outer shell container 11 and the box body 13 are respectively an upper container 11A, a lower container 11B, and an upper box body 13.
A and lower box 13B are divided into two parts, and the devices are distributed and stored in these containers and boxes to form upper element Ea and lower element Ec ', and these elements are stacked vertically. You may make it the structure connected.

In the above embodiment, the outer shell container is formed on a rectangular parallelepiped, but the outer shell container may be formed in another shape, for example, in the shape of a cylinder or in the shape of a cylinder having an elliptical cross section. You can also do it.

[0057]

As described above, according to the present invention, since the outer shell container and the box body of the board are divided into a plurality of parts, it is not necessary to lift a large outer shell container during assembly. Therefore, there is an advantage that not only a large crane or the like can be used for efficient assembly, but also assembly by a flow operation can be facilitated and manufacturing efficiency can be improved.

Further, according to the present invention, since the structure is such that a plurality of elements are connected, there is an advantage that various skeleton structures can be easily dealt with by changing the structure of each element.

Further, according to the present invention, since it is not necessary for a person to enter the outer shell container to perform the assembly work, the assembly can be facilitated and the chance of dust and the like entering can be reduced to insulate. There is an advantage that the reliability of can be improved.

Further, according to the present invention, since the element is divided into a plurality of elements, it is not necessary to replace the entire element when an accident occurs inside, and there is an advantage that it is possible to deal with it by only replacing the element in which the accident occurs. is there.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional side view schematically showing the configuration of an embodiment of the present invention.

FIG. 2 is a front view of an embodiment of the present invention.

FIG. 3A is a top view of an upper element used in an embodiment of the present invention. (B) thru | or (D) are side surface longitudinal cross-sectional views of the upper element, the intermediate | middle part element, and the lower element which are each used in the Example of this invention.

FIG. 4 is a top view showing a configuration in which a plurality of units of the gas insulated switchgear according to the present invention are arranged side by side.

FIG. 5 is a side view showing a part of the upper element or lower element connection structure of the embodiment of the present invention.

FIG. 6 is a cross-sectional view schematically showing a modification of the intermediate element used in the embodiment of the present invention.

7A and 7B are cross-sectional views schematically showing different modified examples of the lower element used in the embodiments of the present invention.

FIG. 8 is a sectional view schematically showing another embodiment of the present invention.

FIG. 9 is a perspective view showing a conventional example with a partial cross section.

[Explanation of symbols]

10 ... Switchgear main body, 11 ... Outer shell container, 12 ... Board, 13
... box, 14 ... upper container, 15 ... intermediate part container, 16 ... lower container, 17 ... upper box, 18 ... intermediate part box, 19 ... lower box, 20 ... upper element container, 21 ... intermediate part element Container, 22 ... Lower element container, 35 ... Insulating spacer, 43, 44, 53 ... Packing, BUS ... Bus conductor, DS1, DS2 ... Disconnector, ESo-ES2 ... Ground switch, CB ... Circuit breaker, CT ... Current transformation Vessel, CHd ... cable head.

Claims (2)

[Claims] 1. A switchgear main body in which a component device including a cable head, a busbar conductor, and a switchgear device provided between the cable head and the busbar conductor is housed in an outer shell container filled with an insulating gas. In the gas-insulated switchgear in which a panel configured by accommodating an operating device and instruments for operating the equipment in the outer shell container is arranged adjacent to the switchgear body, the outer shell container 3 for the upper container, middle container and lower container
The box body constituting the board is divided into three parts, an upper box body, an intermediate box body and a lower box body, and the upper container and the upper element container in which the upper box body is integrated, An intermediate part element container in which a partial container and an intermediate box body are integrated, and a lower element container in which a lower container and a lower box body are integrated, and a device to be housed in the outer shell container is the upper container. And the middle part container and the lower part container are sorted and stored, and the devices constituting the board are sorted and housed in the upper part box, the intermediate part part box and the lower part part box, and the upper element and the intermediate part An element and a lower element, wherein an intermediate element is stacked on the lower element, and an upper element is stacked on the intermediate element, and between the lower container and the intermediate container, and Gas insulated switchgear, characterized in that is connected disconnect airtight holding structure respectively between The inter container and the upper container. 2. A switchgear main body in which a component device including a cable head, a busbar conductor, and a switchgear device provided between the cable head and the busbar conductor is housed in an outer shell container filled with an insulating gas. In the gas-insulated switchgear in which a panel configured by accommodating an operating device and instruments for operating the equipment in the outer shell container is arranged adjacent to the switchgear body, the outer shell container Is divided into an upper container and a lower container, and a box constituting the board is divided into an upper box and a lower box so that the upper container and the upper box are integrated. A container and a lower element container in which a lower container and a lower box are integrated are configured, and devices to be housed in the outer shell container are distributed and housed in the upper container and the lower container, and the board is also provided. The devices that make up An upper element and a lower element are configured by being sorted into an upper box body and a lower box body to be housed, and in a state where the upper element is stacked on the lower element, the space between the lower container and the upper container is airtight. A gas-insulated switchgear characterized by being detachably connected by a holding structure.