JPH0793771B2 - Gas insulated switchgear - Google Patents

Description

TECHNICAL FIELD The present invention relates to a gas-insulated switchgear installed in an electric station such as a substation.

SUMMARY OF THE INVENTION The present invention provides an equipment insertion opening in an outer shell container of a gas-insulated switchgear, and inserts a predetermined opening / closing equipment, or a component constituting the predetermined opening / closing equipment, through the equipment insertion opening. By assembling or attaching the switchgear by simply doing so, the gas-insulated switchgear can be downsized and the assembling can be facilitated.

[Prior Art] A gas-insulated switchgear installed in an electric station such as a substation has main circuit constituent devices such as a circuit breaker, a disconnector, and a grounding device, and devices such as a lightning arrester that does not serve as a main circuit current passage. It is configured by housing in a container filled with SF ₆ gas.

In the gas-insulated switchgear that has been widely used in the past,
Devices such as a circuit breaker, a disconnector, a grounding device, and a main circuit conductor are housed in separate metal containers, and the metal containers are connected to each other through an insulating spacer.

However, in such a structure, since many containers are combined intricately and the structure of the device is complicated, it is difficult to simplify the external appearance and achieve harmony with the urban environment. There is a problem that a lot of grounding space is required to form the shape.

Therefore, recently, an improved gas-insulated switchgear having a structure in which a plurality of devices constituting a switchgear circuit are housed in a common outer shell container has been proposed. According to this structure, since the number of containers is reduced, the structure and appearance can be simplified.
The size of the device can be reduced.

[Problems to be Solved by the Invention] However, in the improved gas-insulated switchgear described above,
The components of each switchgear are stored in the outer shell container through the work opening provided in the outer shell container, and the switchgear is assembled and the predetermined devices are connected in the outer shell container. For this reason, the outer shell container needed to be relatively large enough to be assembled inside.

Therefore, there is a problem that not only the size of the device becomes large, but also much labor is required for assembling the device.

An object of the present invention is to provide a gas-insulated switchgear that can be downsized and can be easily assembled.

[Means for Solving the Problems] The first invention of the present application is, as shown in FIG. 1 showing an embodiment thereof, the switching required for the configuration of a switching circuit such as a circuit breaker CB and grounding devices ES11 and ES12. In order to solve the above problems in a gas-insulated switchgear in which a device is housed in an outer shell container 1, at least one device mounting opening is provided in the outer shell container 1.
Provide 1a. Then, in the outer shell container 1, the connection conductors 11 and 13 for connecting the switching devices in the outer shell container are positioned and supported, and the conductors are connected to the portions of the connection conductors 11 and 13 facing the equipment mounting opening 1a. Parts 15 and 20 are provided. Further, a lid plate 35 that hermetically closes the equipment mounting opening 1a is provided, and a switchgear (circuit breaker CB in this example) to be inserted into the outer shell container through the equipment mounting opening 1a is previously provided in the lid plate. Support it in the assembled state. In the switchgear supported by this cover plate, contact portions 40 and 41 that are automatically connected to the conductor connecting portion 15 provided on the connecting conductor 11 when inserted into the outer shell container 1.
Is provided, and when the device CB is inserted into the container 1 and the cover plate 35 is attached to the opening 1a, the contact portions 40 and 41 are connected to the conductor connecting portion 1
Make it connect to 5,20 automatically.

In the second invention of the present application, at least one device mounting opening 1b is provided in the outer shell container 1, and the opening is provided at a portion of the connection conductors 11, 13 positioned and supported in the outer shell container 1 facing the opening 1b. Switchgear ES11, ES12 mounted through part 1b
The components that form the fixed electrodes 16 and 21 are provided in advance. Further, a lid plate 45 for closing the device mounting opening 1b is provided, and the components constituting the movable contacts 50, 51 of the switchgear to be mounted through the device mounting opening 1b are attached to the lid plate, and the opening is provided. By attaching the cover plate 45 to 1b, the switchgear ES11, E
Allow S12 to be assembled.

In the example shown in FIG. 1, the first invention of the present application is also applied to the grounding device ES2 attached through the opening 1h of the outer shell container 1, and the disconnector DS2 attached through the opening 1h of the outer shell container 1. The second invention of the present application is also applied to.

[Operation] As in the first aspect of the invention, when the pre-assembled switchgear is attached to the lid plate that closes the opening provided in the outer shell container and the lid plate is attached to the outer shell container, If the switchgear attached to the lid plate is configured to be automatically connected to the conductor connecting portion in the outer shell container, the switchgear can be incorporated only by attaching the cover plate to the outer shell container. Therefore, since it is not necessary to carry out a detailed work of mounting the switchgear inside the outer shell container, a small outer shell container can be used, and the device can be downsized. Further, since it is not necessary to assemble the switchgear in the outer shell container, the device can be easily assembled.

As in the second invention of the present application, parts constituting the fixed side contact of the switchgear are attached to the connection conductor provided in the outer shell container, and the switch is provided on the lid plate that closes the opening of the outer shell container. Attach the lid plate to the container even if the components that make up the movable side contact are attached and the opening / closing device is configured inside the outer container when the lid plate is attached to the outer shell container. The switchgear can be incorporated into the switchgear alone, and the same effect as described above can be obtained.

Embodiments Embodiments of the present invention will be described below with reference to the accompanying drawings.

1 to 3 show an embodiment of the present invention, and the electrical construction of each phase of this embodiment is shown in FIG.

In FIG. 4, BUS1 and BUS2 are first and second busbars, DS11 and DS12 are first and second busbar disconnectors, CB is a circuit breaker, and ES11 and ES12 are circuit breaker inspection grounding devices, respectively. Yes, CT is a current transformer. DS2 is a line side disconnector, ES2 is a line side grounding device, CHd is a cable head, LA is a lightning arrester, and PT is an instrument voltage transformer.

In FIG. 1, reference numeral 1 is a main outer shell container that houses the equipment that constitutes the main circuit of the gas insulated switchgear, and 2 is an auxiliary outer shell container that houses the equipment that does not serve as a main circuit current path. Is composed of a cylindrical upper container 1A arranged with its axis oriented in the horizontal direction, and a cylindrical lower container 1B arranged below the upper container 1A with its axis oriented in the vertical direction. At the one end and the other end in the axial direction of the upper container 1A, there are provided openings with flanges that open to the front side and the back side of the device, respectively, and these openings are the equipment mounting openings 1a and 1b, respectively. Has become. Two holes are provided in the upper part of the side wall of the upper container 1A at intervals in the axial direction, and a short branch pipe in which the axial lines are oriented vertically in these holes, respectively.
A1 and A2 are joined by welding, and the flanged open ends of both branch pipes are busbar container mounting openings 1c and 1d for connecting the first and second busbar containers. A hole opened downward is provided in the lower part of the side wall near the other end of the upper container 1A, and a branch pipe A3 having a longer axis than the branch pipes A1 and A2 and having its axis oriented vertically is welded. And the flanged opening end of the branch pipe A3 serves as the lower container connecting opening 1e.

The lower container 1B is arranged below the lower container connecting opening 1e of the upper container 1A, and the flange of the opening 1f at the upper end is the opening.
Airtightly connected to the flange of 1e. Also lower container 1B
An opening with a flange is provided at the lower end of the, and the opening at the lower end serves as an equipment mounting opening 1g for mounting the cable head. A hole opened to the rear side is provided in the upper side wall of the lower container 1B, and a short branch pipe A4 with its axis oriented horizontally is welded to this hole, and the flanged opening end of the branch pipe is disconnected from the line side. It is an opening 1h for equipment installation to attach equipment etc. A hole opened to the front side is provided in the lower part of the side wall of the lower container 1B, and a short branch pipe A5 whose axis is oriented horizontally is welded to the hole.
A5 flanged open end is the auxiliary shell container connection opening
It is 1i.

The auxiliary outer shell container 2 is a first cylindrical portion whose axis is oriented horizontally.
An inverted T-shaped tubular container composed of B1 and a second cylindrical portion B2 which is arranged with its axis oriented in the vertical direction and whose lower end is connected by welding to a hole provided in the upper portion of the side wall of the first cylindrical portion. And the flanged openings 2a, 2b and 2c are provided at both ends of the first cylindrical portion B1 and the upper end of the second cylindrical portion B2, respectively.

A device mounting opening at the lower end of the lower container 1B of the main outer shell container 1
1 g is closed by a lid plate 3, the lid plate 3 is fixed to the installation base 4 by an appropriate means, and the main outer shell container 1 is supported with respect to the installation base. Further, the auxiliary outer shell container 2 is supported by the installation base 4 by the support legs 5, and the opening 2a of the container 2 is connected to the auxiliary outer shell container connecting opening 1i of the lower container 1B through the insulating spacer 6. . A support member 8 having an H-shaped cross section is inserted between the lid plate 7 for closing the opening 2c at the upper end of the auxiliary outer shell container 2 and the upper container 1A of the main outer shell container 1, and the upper container 1A is supported by the support member 8. It is supported.

In the upper container 1A of the main outer shell container 1, a frame 10 is located above the opening 1e and extends in a direction perpendicular to the axis of the container 1A.
The frame 10 is fixed to the inner surface of the side wall of the container 1A by an appropriate means. Above the frame 10 is a container
The first connecting conductor 11 extending in the axial direction of 1A corresponds to three phases (first
In the figure, only the equipment for one phase is mainly shown. ), The connecting conductor is supported by the frame 10 via an insulating support 12. Also, below the frame 10 is a connecting conductor 11
Shorter second connecting conductors 13 are provided for three phases, and the connecting conductors 13 of each phase are supported by the frame 10 via insulating supports 14.

One end of the first connecting conductor 11 of each phase is arranged so as to face the equipment mounting opening 1a of the container 1A, and one end of the connecting conductor 11 faces the opening 1a side and has a circuit breaker connecting conductor connecting portion 15 Is installed. The other end of the connection conductor 11 of each phase is arranged so as to face the equipment mounting opening 1b, and the fixed side contact 16 of the grounding device ES11 is attached to the other end of the connection conductor 11 toward the opening 1b. ing. A branch portion 11a protruding upward is provided at a portion of the one end side of the first connecting conductor 11 facing the busbar container mounting opening 1c, and a conductor connection facing the opening 1c side is provided at a tip of the branch portion 11a. Part 17 is attached. Further, a branch portion 11b protruding upward is provided in a portion facing the other end of the connection conductor 11 of each phase and facing the busbar container mounting opening 1d, and the tip of the branch portion 11b faces the opening 1d side. A conductor connecting portion 18 is attached.

One end of the second connecting conductor 13 of each phase is arranged in the vicinity of the branch pipe A3, and a circuit breaker connecting conductor connecting portion 20 facing the opening 1a is attached to one end of the connecting conductor 13. The other end of the second connecting conductor 13 of each phase is arranged so as to face the opening 1b, and the other end of the connecting conductor 13 has a fixed contact of the grounding device ES12.
21 is attached to the opening 1b.

A frame 25 is arranged at a position closer to the front surface in the lower container 1B of the main outer shell container 1 and is supported on the inner surface of the container 1B by an appropriate means. The lower ends of the three connecting conductors 27 are supported. The third connecting conductor 27 of each phase extends toward the upper container 1A side,
The upper end located in the upper container 1A is removably connected to the conductor connecting portion 28 attached to the lower portion of the second connecting conductor 13 of the corresponding phase.

One end of the disconnecting switch supporting conductor 29 is connected to the lower end of the third connecting conductor 27 of each phase, and the fixed contact 30 of the line side disconnecting switch DS2 faces the opening 1h side to the other end of the disconnecting switch supporting conductor 29. Installed.

Three-phase cable heads CHd are attached to the cover plate 3 that closes the opening 1g at the lower end of the lower container 1B with their axes oriented vertically, and the cable heads for each phase stand from the underground cable pit. A raised cable (not shown) is connected. The intermediate portion of the fourth connecting conductor 32 is connected to the terminal electrode provided on the upper end of the cable head CHd of each phase via the conductor connecting portion 31, and one end of the fourth connecting conductor 32 of each phase is a lower container. It is connected to a buried conductor of an insulating spacer provided between 1B and the container 2 for non-heating equipment.

A current transformer CT is fitted to the third connecting conductor 27, and the current transformer is suspended and supported by a support portion 33 projecting from a flange of an opening 1f provided at the upper end of the lower container 1B. It is mounted on the current transformer support plate 34.

The conductor connection portions 15, 17, 18, 20, 28 and 31 have a known structure in which tulip-shaped female contacts are covered with a shield, and each conductor connection portion has a male part provided in a predetermined device. The side contact can be connected and removed freely.

The three-phase circuit breakers CB are arranged in a triangle and one end of each is fixed to the circuit breaker mounting plate 35. The three-phase circuit breaker CB is inserted into the upper container 1A through the equipment mounting opening 1a provided on the front side of the upper container 1A in a posture in which the respective axes are oriented horizontally, and the circuit breaker mounting lid is installed. The plate 35 is hermetically connected to the flange of the device mounting opening 1a, and the three-phase circuit breaker CB is supported by the container 1A via the cover plate 35. The circuit breaker CB of this embodiment is a gas circuit breaker in which a breaker composed of a fixed contact, a movable contact, and an appropriate arc extinguishing mechanism is housed in a tubular insulating container 36 of an airtight structure filled with SF ₆ gas. , Each circuit breaker CB
A movable electrode 37 connected to the movable contact is provided at a portion near one end of the container 36, and a fixed electrode 38 connected to the fixed contact is provided at the other end of the container 36. A terminal electrode 39 is connected to the movable side electrode 37, and a male side contact 40 connected to the conductor connecting portion 15 provided on the first connecting conductor 11 is provided at the tip of the terminal electrode. The fixed side electrode 38 is provided with a male side contact 41 connected to the conductor connecting portion 20 provided on the second connecting conductor 13, and the circuit breaker is provided.
When the CB is inserted into the container 1A through the equipment mounting opening 1a, the contacts 40 and 41 connected to both terminals of the circuit breaker CB of each phase are automatically connected to the conductor connection portions 15 and 20 of the corresponding phase in the container 1A. To be able to connect to.

On the front side of the container 1A, there is arranged a vertically long box-shaped front operation box 42 whose lower end is supported by the installation base 4, and inside the operation box 42, there is provided a circuit breaker supported on the outer surface of the lid plate 35. An operating mechanism 43 and an operating device 44 for operating the circuit breaker via the operating mechanism are housed. Although not particularly shown, a door is provided on the front surface of the controller box 42, and with the door opened, the cover plate 35 can be removed and the circuit breaker CB can be pulled out forward to inspect each circuit breaker. It is like this.

2 and 3, the mounting structure of the grounding devices ES11 and ES12 for inspecting the circuit breaker is shown in detail. That is, a lid plate 45 that hermetically closes the equipment mounting opening 1b provided on the back side of the upper container 1A is provided, and the bushings 46 and 47 are attached to each of the three phases by hermetically penetrating the lid plate 45. ing. Grounding device support conductors 48 and 49 are provided through the bushings 46 and 47 of the respective phases in an airtight manner,
The movable side contacts 50 and 51 of the respective phases of the grounding devices ES11 and ES12 are supported at the ends of the supporting conductors 48 and 49 of the respective phases inside the container 1A. The movable contacts 50 and 51 are composed of movable electrodes operated by the operating rods 50a and 51a, current collecting contacts slidably supporting the movable electrodes, and shields 50b and 51b covering the contacts. Contactor 50 and
A current collector contact and shield at 51 are electrically and mechanically connected to the feedthrough conductors 48 and 49. Control rods 50a and 50b
Are connected to each other by a connecting plate 52 made of an insulating material, and the connecting plate 52 is connected via a connecting mechanism 53 to an airtight penetrating shaft 54 that is attached to penetrate the cover plate 45 in an airtight manner. In this embodiment, the connecting mechanism 53 has a lever-like shape in which a lever 53a attached to the airtight penetrating shaft 54 and a frame 53b fixed to the lid 45 have corners pivotally supported and one end connected to the connecting plate 52. The operating lever 53c is composed of a connecting link 53d connecting the lever 53c and the other end of the operating lever 53c. The operating lever 53c rotates with the rotation of the airtight penetrating shaft 54, and the operating rod via the connecting plate 52. Five
The 0a and 51a are linearly displaced. The movable contacts 50 and 51 of each phase are provided so as to face the fixed contacts 16 and 21 of the corresponding phase when the cover plate 45 is attached to the device mounting opening 1b. Child 50
And 51 and the fixed side contacts 16 and 21 constitute grounding devices ES11 and ES12.

On the back side of the container 1A, a vertically long box-shaped back side operation box 55 having a lower end supported by the installation base 4 is arranged, and an operation device 56 for a grounding device arranged in the operation box 55 has an airtight penetrating shaft. The grounding devices ES11 and ES12 are collectively operated by being connected to 53 and operated by the operation device 56.

A device mounting opening 1h provided on the back side of the lower container 1B
A lid plate 57 that hermetically closes is provided, and a three-phase conductor 59 is supported on the inner surface of the lid plate 57 via an insulating support 58. In the conductor 59 of each phase, the movable side contactor 60 of the disconnector DS2 of each phase,
The fixed side contactor 61 of the grounding device ES2 and the conductor connecting portion 62 connected to the fourth connecting conductor 32 are electrically and mechanically connected, and the movable side when the cover plate 57 is attached to the opening 1h. The contactor 60 faces the fixed side contactor 30 to form the disconnector DS2, and the conductor connecting portion 62 is connected to the connecting conductor 32 to disconnect the disconnector DS2.
2 is connected to the cable head CHd.
The insulating operation rod 60a for operating the movable side contactor of the disconnector DS2 is introduced into the operator box 55 by penetrating the cover plate 57 in an airtight and slidable manner, and is connected to the disconnector operator 63 in the operator box. It is connected.

A movable side contactor 64 of the grounding device ES2 is also attached to the cover plate 57, and the operating rod 64a of the movable side contactor 64 is led out to the outer surface side of the cover plate 57 to operate the grounding device in the operator box 55. Connected to the device 65.

The flanges of the first and second busbar container connecting openings 1c and 1d provided on the upper side wall of the upper container 1A have the first
And the second busbar containers 70 and 71 are connected. The first and second busbar containers 70 and 71 respectively have first cylindrical portions 70A and 71A whose axes are oriented in the vertical direction and a lateral direction orthogonal to the first cylindrical portion (a right angle to the plane of FIG. 1). Direction) is formed in a cross-shaped tubular shape including second cylindrical portions 70B and 71B, and the lower ends of the first cylindrical portions 70A and 71A are connected to the openings 1c and 1d of the upper container through the insulating spacers 72 and 73. Has been done. Three-phase busbar conductors 74 and 75 forming the first and second busbars BUS1 and BUS2 are housed in the second cylindrical portions 70B of the busbar containers 70 and 71, respectively, and the busbar conductors are included in the second cylindrical portion 70B.
Both ends of B and 71B are supported by insulating spacers (not shown) that are attached so as to close airtightly. The busbar side disconnector DS11 is housed in the space on the side of the insulating spacer 72 in the first cylindrical portion 70A of the busbar container 70, and one end of the busbar side disconnector DS11 is connected to the corresponding phase of the busbar BUS1. The other end of the DS11 is connected to a conductor 76 that hermetically penetrates the insulating spacer 72. The conductor 76 is provided with a male contact 76a, and when the insulating spacer 72 is connected to the opening 1c of the upper container 1A, the contact 76a connected to the disconnector DS11 of each phase is automatically connected to the corresponding conductor connection portion 17 of the corresponding phase. It is designed to be connected to. Similarly, the busbar disconnector DS12 is housed in the space on the side of the insulating spacer 73 in the first cylindrical portion 71A of the busbar container 71, and one end of the busbar disconnector DS12 is connected to the corresponding phase of the busbar BUS2. The other end of the disconnector DS12 is connected to a conductor 77 that penetrates the insulating spacer 73 in an airtight manner. The conductor 77 is provided with a male contact 77a, and the insulating spacer 73 is attached to the upper container 1A.
The contact 77a connected to the disconnector DS12 of each phase when connected to the opening 1d of 1. is automatically connected to the conductor connecting portion 18 of the corresponding phase. Bus-side disconnectors DS11 and DS
The twelve movable contacts are connected to the disconnecting switch operating device 78 in the rear side operating device box 55 via a connecting mechanism (not shown). The upper ends of the first cylindrical portions 70A and 71A of the busbar containers 70 and 71 have a lid plate 79.
1 and 80 are hermetically closed by the main circuit component equipment container 1.
The equipment housed inside and the equipment housed inside the busbar containers 70 and 71 constitute a main circuit that serves as a path for the main circuit current.

An instrument voltage transformer PT is arranged in the second cylindrical portion B2 of the auxiliary outer shell container 2, and the voltage transformer is supported by a lid plate 7 that closes the upper end opening of the second cylindrical portion B2. . The first cylindrical portion B1 of the auxiliary outer shell container 2 has a lightning arrester with its axis oriented horizontally.
Three phases of LA are stored. Three-phase lightning arresters are each Zn
It has a well-known structure in which a characteristic element such as O is housed in a cylindrical container, and is triangularly arranged in the first cylindrical portion B1 with a predetermined insulation distance. One end of each lightning arrester LA is supported by an airtight penetrating shaft 82 provided on a lid plate 81 that hermetically closes the opening 2b of the first cylindrical portion B1, and the airtight penetrating shaft 82 led out to the inside of the operation device box 42. Each lightning arrester LA can be displaced in the axial direction by pulling in and out the airtight penetrating shaft while holding the end portion. Terminal provided at the other end of each lightning arrester LA
83 is removably connected to a female contact 84 attached to a buried conductor of an insulating spacer 6 arranged between the auxiliary outer shell container 2 and the lower container 1B of the main outer shell container 1. That is, in this embodiment, by operating the airtight penetrating shaft 82 to displace the arrester LA in the axial direction, it is possible to connect or disconnect the arrester LA and the contact 84. , It is possible to disconnect the lightning arrester LA from the main circuit at the time of a voltage test of the cable head. The terminal of the voltage transformer PT is connected to the terminal of the lightning arrester LA by a flexible conductor 85 and contacts the terminal of the lightning arrester LA.
It is designed to be connected to the main circuit via 84 and.

The main outer shell container 1, the auxiliary outer shell container 2, and the first and second busbar containers 70 and 71 are filled with SF ₆ gas at a predetermined pressure.

In the above embodiment, the circuit breaker CB attached to the cover plate 35 is inserted into the outer shell container 1 through the device mounting opening 1a to cover the cover plate.
The circuit breaker can be attached by simply attaching 35 to the opening 1a. Further, the grounding devices ES11 and ES12 can be assembled simply by attaching the cover plate 45 supporting the components (movable contacts) of the grounding devices ES11 and ES12 to the opening 1b. Therefore, it is not necessary to attach and assemble the switchgear inside the outer shell container 1. (There is no need for a worker to enter the outer shell container)
Therefore, a small-sized outer shell container 1 can be used, and the device can be downsized. In addition, outer shell container 1
Since it is not necessary to assemble in a narrow space inside,
Assembly of the device can be facilitated.

In the above embodiment, the lid plate 3 of the lower container 1B of the main outer shell container 1
While the main outer shell container 1 is supported by abutting against the installation base 4, the main outer shell container 1 is supported by the front and rear operation device boxes 42 and 55, and The lid plate 3 can also be made removable from the underground cable pit side. With this configuration, the container 1
The cable head CHd can be installed by installing the cover plate 3 after installing the cable, so it is easy to assemble the device when disassembling the cable head is not allowed at the installation site, such as when using an OF cable. You can

Although the circuit breaker is arranged horizontally in the above-mentioned embodiment, the present invention can be applied to the case where the circuit breaker is arranged in another posture, for example, vertically.

When the voltage transformer is housed in the common container for non-heating equipment together with the lightning arrester as in each of the above-described embodiments, the lightning arrester and the voltage transformer can be disconnected from the main circuit during the voltage application test of the cable. The connection structure can be simplified.

In the above embodiment, the current transformer CT is housed in the main outer shell container, but the current transformer CT may be fitted to the cable C outside the container.

[Effects of the Invention] As described above, according to the first invention of the present application, the pre-assembled opening / closing device is attached to the lid plate that closes the opening provided in the outer shell container, and the lid plate is used as the outer shell container. The switchgear attached to the lid plate is configured to be automatically connected to the conductor connecting portion in the outer shell container when it is attached to the outer shell container. Can be embedded. Therefore, since it is not necessary to carry out a detailed work of mounting the switchgear inside the outer shell container, a small outer shell container can be used, and the device can be downsized. Further, since it is not necessary to assemble the opening / closing device in the outer shell container, there is an advantage that the device can be easily assembled.

According to the second invention of the present application, a component constituting the fixed side contact insertion of the switchgear is attached to the connection conductor provided in the outer shell container, and the switch is provided on the lid plate that closes the opening of the outer shell container. Since the parts that make up the movable side contact of are attached, and when the lid plate is attached to the outer shell container, the opening and closing device is configured inside the outer shell container, so simply by attaching the lid plate to the container The switchgear can be incorporated, and the same effect as described above can be obtained.

[Brief description of drawings]

FIG. 1 is a schematic sectional view showing the structure of an embodiment of the present invention,
1 is an enlarged sectional view showing the vicinity of the installation device of the embodiment of FIG. 1, FIG. 3 is a view taken along the line III-III of FIG. 2, and FIG. 4 is an electrical diagram of each phase of the embodiment. It is a single line connection diagram showing composition. 1 ... Main outer shell container, 2 ... Auxiliary outer shell container, 11,13,27 ...
Connection conductor, 15,20 ... Conductor connection part, 16,21 ... Fixed side contactor, 30 ... Fixed side contactor, 35,45 ... Lid plate, 50,51 ... Movable side contactor, 60 ... … Movable contactor, 61 …… Fixed contactor, 64 …… Movable contactor, CB …… Breaker, BUS1 …… First
Busbar, BUS2 ... second busbar, DS11, DS12 ... busside disconnector, ES11, ES12 ... grounding device, DS2 ... disconnector, CHd ...
… Cable head.

Claims (2)

[Claims] 1. An outer shell container (1) is provided with a switchgear such as a circuit breaker (CB) and a grounding device (ES11, ES12) necessary for constructing a switchgear circuit.
A gas-insulated switchgear housed in a container, wherein the outer shell container (1) has at least one device mounting opening (1a), and the outer shell container has a plurality of device mutual openings therein. The connection conductors (11, 13) for connecting between are positioned and supported, and the conductor connection portions (15, 20) are provided in the portions of the connection conductors facing the device mounting opening, and the device mounting opening ( 1a) airtightly closing the lid plate (3
5) is provided, and the device mounting opening (1
Switchgear (C) attached to the outer shell container through b)
B) is supported in a pre-assembled state, and the switch conductor (CB) supported by the cover plate (35) has the connection conductor (a) when the cover plate is attached to the device attachment opening (1a). A gas-insulated switchgear comprising contact parts (40, 41) automatically connected to conductor connection parts provided in (11, 13). 2. An outer shell container (1) is provided with a switching device such as a circuit breaker (CB) and a grounding device (ES11, ES12) which is necessary for the construction of a switching circuit.
A gas-insulated switchgear housed inside, wherein the outer shell container (1) has at least one device mounting opening (1b), and the outer shell container has a plurality of device mutual openings therein. Fixing of switchgear (ES11, ES12) inserted through the opening of the connecting conductor (11, 13) which is positioned and supported to connect between the parts and faces the opening for mounting the device (1b) of the connecting conductor The lid plate (4) to which the components that form the side contacts (16, 21) are attached and which hermetically closes the device mounting opening (1b) is provided.
5) is provided, and the device mounting opening (1
b) Movable contact of switchgear (50,
51) is supported, and the opening / closing device (ES1) is installed by attaching the cover plate (45) so as to airtightly close the device installation opening (1b).
1, ES12) is configured so that it is a gas-insulated switchgear.