JPS6022404A - Gas insulated switching device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a gas insulated switchgear installed in an electrical station such as a substation.

BACKGROUND ART Recently, gas-insulated switchgear installed in substations, etc., has attracted attention in a structure in which multiple devices constituting the switchgear are housed in a common container filled with relatively low-pressure insulating gas. ing. This structure allows for a much simpler structure than a gas-insulated switchgear in which each device is housed in a separate tubular container and the containers are connected via insulating spacers. Furthermore, it is possible to downsize the device and save installation space.

Furthermore, since the appearance can be simplified, harmony with the surrounding environment can be easily achieved.

By the way, when this type of equipment is placed inside an electrical plant building, it is necessary to downsize the equipment to make the building as small as possible, but the height of the building is determined by human habitability and workability. This is fixed to a certain extent, and generally the height of a building cannot be set below 2.5 to 3 meters. In addition, the width of the building is determined by the width of the switchgear housed inside, but when using gas-insulated switchgear that consists of three-phase necessary equipment housed in a common unit container, the unit container of the switchgear is Since the width of the container is approximately determined by the insulation distance between them, there is a limit to reducing the width of the conite container. Therefore, in order to downsize the building in which this type of equipment is housed, it is necessary to reduce the depth dimension of the conite container.

OBJECTS OF THE INVENTION It is an object of the present invention to provide a gas-insulated switchgear that can reduce the depth dimension of a unit container that houses equipment constituting the switchgear.

Structure of the Invention The present invention provides a busbar-side disconnector having one end connected to the busbar, a circuit breaker having one end connected to the other end of the busbar-side disconnector, and the other end of the circuit breaker connected to the 11th wire. Necessary equipment, including a line-side disconnect switch placed between the cable head to which the cable of the line to be connected is connected, is housed in a common unit container that is generally rectangular or cubic in shape.
A gas-insulated switchgear constitutes a switching circuit for a line, and in the present invention, the connecting switch and the line-side disconnecting switch are arranged vertically on the front side of the one-knit container, and the respective axis lines are arranged parallel to the front surface of the container. The busbar side disconnector is disposed on the rear side of the Connit container so that its axis is parallel to the rear surface of the Connit container, and the cable head is attached to the bottom of the busbar side disconnector. ing. the busbar is located at the top of the outside of the back of the conite container;
The busbar is connected to the busbar side disconnector by penetrating the back wall of the container 1 to the container.

As mentioned above, if all relatively large and space-consuming circuit breakers and disconnectors are placed with their respective axes parallel to the front and rear sides of the unit container, the depth dimension of the unit container can be reduced. This makes it possible to downsize the building that houses the gas-insulated switchgear. Furthermore, since there is a sufficient distance between the top surface of the unit container and the ceiling of the building, a wide working space can be secured above the circuit breaker. Therefore, the circuit breaker installation work can be easily performed, and the circuit breaker can be easily maintained, inspected, and repaired. In addition, this type of device generally requires a considerable amount of space behind the cable head in order to carry out the @ theory of the cable, but in this case the space above the cable head becomes dead space. In the present invention, since the busbars are arranged using this dead space, the space can be used effectively.

The present invention will be described in detail below with reference to drawings W1.

Figures 1 and 2 show an embodiment in which the present invention is applied to a gas-insulated switching device disposed between the busbar of an electric station with a medium line configuration and a line (for example, a feeder) connected to the busbar. In these figures, 1 is a vertically long rectangular parallelepiped metal container.

A disconnector is installed on the wall of the upper surface 1A of the unit container 1 ()
Two circular holes are provided for the first number of devices. Three mounting LJ holes 2 (for three phases) are provided at a predetermined interval of 4J in the lateral direction of the container 1 (direction perpendicular to the paper surface of FIG. 1), and the inner diameter of each of the four mounting holes 2 is as follows. The size is set so that an externally assembled circuit breaker can be inserted from above. Container 1 - At the top of the back 1B of container 1, there is a second device number 4.
A hole 3 is provided. For this equipment mounting, holes 3 are also provided on three sides with predetermined intervals in the lateral direction of the unit container, and these three equipment mounting holes correspond to the three first equipment mounting holes C, respectively. located at the location.

Three equipment mounting holes 4 are provided below the holes 3 for mounting the cable head, and three third equipment mounting holes 4 are provided side by side in the lateral direction of the unit container.
The three second device attachments are provided at positions corresponding to the holes 3, respectively.

The above-mentioned first to third equipment mounting holes 2 to 4 are arranged horizontally in groups of 3 (for 3 phases). They are installed so that they are located on the same vertical plane (a vertical plane parallel to the plane of the paper in Figure 1), and these installations are made so that the equipment of each phase installed in the hole is arranged along the same vertical plane. In addition, a fourth device mounting hole G-J is provided on the bottom surface 1C of the unit container 1, and this fourth device mounting hole can be used as a hand hole. The device mounting hole is formed to have a larger diameter than the hole.
For mounting the fourth equipment, holes 2 to 50 are provided with mounting flanges 2a to 5a on the periphery of the openings, and each mounting flange is provided with a screw to the G-J port 1. There is a screw hole for insertion.

The unit container 1 described above is vertically fixed to the pedestal 10 by joining its lower end to the upper end of a pedestal 10 formed into a substantially cubic or rectangular parallelepiped shape.

In this embodiment, the above-mentioned knitted container 1 houses three phases of equipment constituting an opening/closing circuit having a top busbar configuration as shown in the single line diagram in FIG. 3.

In Figure 3, Cl-16 is the cable head, PT is ■
CT is a current transformer, DSI and DS2 are a line side disconnector and fl'1 line side disconnector, respectively, CB is a circuit breaker, FS1 and ES2 are grounding devices, and BtJS is a bus bar. ll! One end of the '1m side disconnector DS2 is connected to the bus bar BUS, and the other end of the disconnector is connected to the - of the circuit breaker CB.
, connected to the end. A line side disconnector DSI is arranged between the other end of the circuit breaker CB and the cable head CI-1 (1), and a grounding device ES1 is arranged between the cable head side terminal of the disconnector DSI and the ground, and a disconnector DS2 is installed between the cable head side terminal of the disconnector DSI and the ground. A grounding device ES2 is disposed between the circuit breaker side terminal and the ground, respectively.Furthermore, the four-way transformer PT is connected to the circuit between the disconnector DSI and the cable head CHd.

As shown in FIG. 1, the instrument transformer PT is arranged inside the pedestal 10, and the terminal section 1 provided at the upper end of the transformer
1 is inserted into the unit container 1 through the hole 5. A mounting flange 12 is provided at the -L portion of the four-way transformer PT, and this mounting flange 12 is airtightly connected to the flange 5a of the fourth device mounting hole 5 of the unit container 1. While the transformer PT is installed in the unit container 1, the hole 5 for the fourth equipment installation is hermetically closed.

The circuit breakers CB for three phases (three units) are installed in parallel with the front surface 1D of the container 1 (perpendicularly ) installed. Each circuit breaker CB houses a circuit breaker consisting of a movable contact, a fixed contact, and an arc extinguishing mechanism in an insulating container 13 filled with SF6 gas, and the container 13 has a fixed side terminal connected to the fixed contact. 14 and a movable terminal 15 connected to the movable contact. These 3
One end of the container 13 of the circuit breaker CB is airtightly connected to a device mounting plate 18 which also serves as a cover plate for closing the device mounting hole 2. Each circuit breaker CB is inserted into the unit container 1 through the hole 2 for equipment mounting, and is arranged vertically so that its axis is parallel to the front surface 1D of the container 1. The unit is attached to the flange 2a from the outside of the unit container by bolts. Installation is on board 189
- The connection part with the flange 2a is formed airtightly, and each device is installed so that the hole 2 is closed airtightly at the same time as the circuit breaker is housed in the unit container.

Each circuit breaker CB is mounted on the board 18 so that one end of its container 13 can be opened from the outside through a hole, and by opening one end of the container 13, the unit container 1 By venting the gas inside, the shutoff section can be pulled out and inspected.

In this way, in the present invention, each circuit breaker CB is installed through a hole on the top surface of the unit container, so that sufficient work space can be secured above the device, and one end of the container 13 can be opened. Maintenance and inspection work on the circuit breaker can be easily performed by pulling out the circuit breaker. Furthermore, since each circuit breaker is arranged vertically with its axis parallel to the front surface of the unit container, the space occupied by each circuit breaker in the depth direction within the unit container can be minimized.

The three-phase line-side disconnector DS1 is installed inside the lower part of the front wall of the unit container with its axis parallel to the front surface of the container. This disconnector DS1 has a fixed contact 21 and a movable contact 22 supported on an insulating support 20 formed in a substantially square shape, and the fixed contact 21 consists of a tulip contact arranged inside a shield. There is. The movable contact 22 is a rod-shaped contact that is linearly displaced by being driven by an operation shaft (not shown) and is arranged within a shield, and the fixed contact 21 and the movable contact 22 are arranged coaxially with each other. 3-phase disconnector DS1
are arranged at equal intervals in the direction perpendicular to the plane of the paper in FIG.
is installed. Movable contact 22 of disconnector [) 81
is connected to the fixed side terminal 14 of the circuit breaker CB of the corresponding phase via the connecting conductor 27. The fixed contact 21 of the disconnector DS1 is also provided with a fixed electrode 28 of the earthing device ES1. The movable electrode 29 of the earthing device ESI is attached to an operating shaft 30 rotatably supported by a frame (not shown) provided at the lower part of the unit container 1, and the movable electrode 29 is attached to the operating shaft 30. It is driven to rotate between a grounded position where it contacts the fixed electrode 29 and a non-grounded position which is at a predetermined angle from the fixed electrode 29.

The three-phase busbar side disconnect switch DS2 is connected to the second device number (14) on the back of the container from the leek 1 to the insulating support 31 attached to the hole 3.
This disconnector DS2 is provided so that the axes of its fixed contact and movable contact are parallel to the back surface of the unit container 1.

The insulating support 31 is made of a molded product of an insulating material 1 such as epoxy resin, and has a flange portion 31a.
Protrusions 31b and 31C are provided on one surface of the holder 31b and 31C, which are arranged in the vertical direction. A truncated cone-shaped protrusion 31d is provided on the other surface of the support 31, and the protrusion 31d penetrates the hole 3 for mounting the second device and protrudes to the outside of the container 1. A conductor 32 is provided to penetrate through each protrusion 31c and the center of the protrusion 31d of the support 31, and a fixed contact 33 is connected to one end of each conductor 32 located inside the container 1. Further, a movable contact 34 is supported by each protrusion 31b of the support 312-1, and each fixed contact 33 and movable contact 34 constitute a busbar side disconnector 1') 82 for each phase. The fixed contact 33 of each disconnector DS2 is made of a tulip contact arranged inside a shield, and the movable contact 34 is a rod-shaped rod that is operated by an operating shaft and linearly driven to move toward and away from the contacts of the fixed contact 33. Contactor 34a and the contactor 34a
It consists of a current collecting contact that comes into contact with the shield and a current collecting contact placed inside the shield. The structure of this disconnector DS2 is similar to the structure of the aforementioned disconnector DS1.

The flange portion 31a of the insulating support body 31 supporting the busbar side disconnector DS2 is connected to the flange 3a on the periphery of the opening of the second equipment mounting hole 3, and the equipment can be mounted by connecting the flange portion 31 and the flange 3a. Hole 3 is hermetically closed. The movable contact 34 of the disconnector DS2 is connected via a connecting conductor 35 to the movable terminal 15 of the corresponding phase interrupter SCB.

The rod-shaped contact 13-a of the movable contact 34 of the disconnector DS2 is shaped like a protrusion that protrudes to the opposite side of the fixed contact 33 when the disconnect II) S2 is in an open state. The child 34 also serves as a movable electrode of the grounding device ES2. A fixed electrode 36 on which the rod-shaped contact 34a comes into contact with and separates from a position vertically opposed to the movable contact 34 of the disconnector DS2 inside the upper wall of the Connit container 1
is fixed, and the fixed electrode 36 and the movable contact 34 of the disconnector DS2 constitute a grounding device @E82.

In the fourth equipment installation of the unit container 3, a three-phase cable head CHd is attached through the hole 4 in an airtight negative manner.

A connector 41 provided at the tip of a cable 40 that constitutes a line (for example, a feeder) connected to the bus bar BUS via an open/close circuit is connected to each cable head CI-16 so that it can be inserted and removed from the outside of the container 1. has been done. The height from the floor to each cable head is set at 1 to 1.5 m to facilitate the work of attaching and detaching the cable to each cable head.

To each cable inside the back wall of the unit container 1, a bushing BS whose axis is oriented parallel to the back wall of the container (in the vertical direction) is supported via a support 42 at a position below the 14-rad CHd. 1. A current transformer CT is attached to the TSING BS. The upper terminal of each bushing BS is connected to the terminal of the cable head CI-1d, and the lower terminal of each bushing is connected to the fixed contact 21 of the line-side disconnector DS1 via the connecting conductor 42.
5. A conductor 42a branched from the two-phase connecting conductor among the three-phase connecting conductors 42 is connected to the instrument transformer PT.
The transformer is connected to terminal 11 of the transformer so that the line voltage between either phase is measured.

On the front surface 1D of the unit container 1, operation device boxes 50 to 53 are supported which house the operation devices of each i-device. That is, an operator box 50 that stores a circuit breaker operator is supported at the upper front of the unit container 1, and an operator box 50 that stores an operator for operating the disconnector DS2 and the earthing device ES2 is installed below the operator box 50. A container box 51 is supported. Also, below the operating box 5115- are the operating device for the disconnect switch DS1 and the grounding device ES1.
Operating device boxes 52 and 53 each containing operating devices are supported side by side in the horizontal direction. The operating device in the operating device box 50 is connected to an operating rod (not shown) provided in the operating device box 50 that supports the circuit breaker CB through the plate 18 in an airtight and slidable manner. The connecting portion with the operating device is covered by a cover 54. Also, the operation box 51 to 5
The operating device in 3 is connected via a link mechanism 56 or the like to a pull-out shaft for operating a predetermined device that is pulled out through the side wall of the container 1 in an airtight manner.

In this embodiment, each of the above parts, the beaten unit container 1
and a circuit breaker CB and a disconnector DS1. housed in the container. D
A line unit 60 is constituted by S2, grounding device @[sl, [Es2, the operating devices of these devices, and cable head CI-(d).

A bus unit 70 is located at the upper rear of the line unit 60.
The busbar connit 70 includes a busbar container 71 formed in a box shape and a busbar BLJ housed in the container.
S and Karanatsu-C are here. Generic Capacity 16 - A hole 71a is provided on the front side of the container 71, and a flange portion 71b provided around the hole 71a is airtightly attached to the flange 3a around the use hole 3 for mounting the second equipment of the unit container 1. It is connected to the. Openings 7 are provided at both lateral ends of the container 71.
1c, and an insulating spacer 72 is attached to close the opening 71c. Further, a working opening is provided on the back side of the container 71, and the opening is connected to the lid plate 73.
is hermetically closed. Three-phase conductors 74 constituting the bus line BUS are supported by the insulating spacer 72, and the conductors 74 of each phase are connected to the conductor 32 connected to the fixed contact of the bus-side disconnector DS2 of the corresponding phase.

In this embodiment, two line units 60 are provided as shown in FIG. These two line units are placed side by side in close proximity to each other horizontally, with the pedestals 10 in close contact and the operation boxes 50 to 53 aligned in front, so as to form a line panel. The container 71 of the bus unit 70 connected to 60 is connected to the other line unit 60.
2 and are airtightly connected.

As described above, in the present invention, all of the circuit breakers and disconnectors are arranged so that their axes are parallel to the vertical walls of the unit container 1, so that the depth dimension of the unit container can be significantly reduced. - It is possible to downsize the building housing the gas insulated switchgear.

In assembling the above gas insulated switchgear, first place the unit container 1 on the stand 10.

Next, install the equipment on the bottom of the unit container 1 (using the J hole 5 as a hand hole, install the disconnectors DS1, DS2, grounding devices ES1, ES2, cable head CHd, bushing, and BS, and install the equipment on the top of the container 1. Install circuit breaker CB through hole 2.

After each device is connected to each other, the instrument transformer PT is installed in the hole 5. At this point, the terminal 11 of the transformer PT and the conductor 42a are automatically connected. Next, attach the bus bar unit 70 to the back side of the container 1, and
A conductor 7418- that constitutes S is connected to the conductor 32. Predetermined number of lines - 1 - 1~
60 are lined up and the busbars 1 to 2 are connected, then 2K of SF6 gas is added into each unit container 1 and busbar container 71.
g/CI! Fill at low pressure:

In the above embodiment, the insulating support body 31 supporting the busbar side disconnector DS2 also serves as an insulating spacer for separating the gas between the unit container 1 and the busbar container 71. If the support for the disconnector placed at the boundary between the two gas-divided spaces doubles as an insulating spacer, the disconnector would be supported by the insulating support provided separately from the insulating spacer. The number of parts can be reduced compared to conventional ones, and the space required for installing equipment can be saved.

As mentioned above, when installing equipment in each phase of the unit container, holes are provided so that the respective center axes are located on the same vertical plane, and all the operation boxes 50 to 53 are arranged collectively on the front side of the unit container. , as shown in Figure 2, multiple line units are placed closely together so that the dimensions between the units are non-uniform.
It is possible to always construct small rows of boards, and the area of both stages of the gas insulated switchgear can be reduced. In addition, all of the control boxes are located on the front side, so inspections of the I and I can be efficiently performed from the 114th side.

In order to arrange the 13 non-busbars in the present invention as in the second embodiment at the upper part of the back surface of the unit container 1, a work space is provided on the platform that connects the plurality of line units 60 to each other at the busbar portions. can be taken in sufficient quantity, and workability can be improved. Furthermore, if an accident occurs on the bus line BUS, the bus unit can be replaced without any effect on each line unit. Furthermore, since the dead space above the cable head is used to arrange the busbar, the space can be used effectively.

As in the above embodiment, the circuit breaker CB is installed from the top surface of the unit container, so that one end of the circuit breaker container 13 can be opened and the breaker can be pulled out without handling the gas in the unit container. This, combined with the fact that there is sufficient work space above the circuit breaker, makes it easier to inspect the circuit breaker.

In the embodiments described above, the instrument transformer PT is not always provided, and depending on the circuit, no instrument transformer may be provided. When such auxiliary equipment, which is not always provided, is installed using the space below the unit container, which is originally a dead space, as in the above embodiment, the space can be used effectively.

As in the above example, when installing equipment on the back side of the unit container, if you use the hole to attach the cable head CHd, you can secure a sufficiently wide space around the cable head, making it easy to attach and detach the cable to the cable head. can be done.

Next, Figure 4 shows each line as two mothers! 11BUS, ButS
This shows an embodiment in which the present invention is applied to a switching circuit with a double busbar configuration connected to Bus'.
is located. The additional unit 80 includes an additional unit container 81, and a bus-side disconnector 21-DS3 connected to the bus line Bus= and a grounding device ES2 are housed in the container 81. Container 81
is formed in a box shape, and the four pieces of equipment to which the disconnector is attached are arranged on the 4p side of the hole 2, and its lower end opening is hermetically connected to the upper surface of the unit container 1. Furthermore, this container 8
1 and the unit container 1 is arbitrary, and may be removably connected by bolts, or may be connected by welding.

The front wall of the container 81 is provided with an opening 82 used as a hand hole, and the upper part of the back wall of the container 81 is provided with a hole 83 for installing equipment. Closed.

Similarly to the busbar side disconnector DS2, the busbar side disconnector DS3 includes a fixed contact 33' and a movable contact 34' supported on an insulating support 31-, and an insulating support that also serves as an insulating spacer. The protruding portion 31d of the support body 31' is fitted into the device mounting hole 83, and the flange portion 318' of the support body is
It is airtightly connected to the periphery of the S-shape claw attachment hole 83. A hole 85 is provided through a portion of the upper wall of the unit container 1 facing into the container 81 for installing equipment, and a bushing 86 is attached to the hole 85 through the hole in an airtight manner.

The upper end of the bushing 86 is connected to the movable contact 34 of the disconnector DS3.
', and its lower end is connected to the movable contact 34 of the disconnector DS2. The movable contact of the disconnector DS3 is also provided with a fixed electrode 87 for a grounding device, and a frame (not shown) provided in the container 81 supports a rotatable movable electrode 88 that comes into contact with and separates from the fixed electrode 87. has been done. Movable electrode 8
8 and the fixed electrode 87 constitute a grounding device @FS2, and the grounding device ES2, the disconnector DS3, the container 81, and the like constitute an I1 addition unit 80.

A busbar unit 70-, which is configured similarly to the busbar unit 70, is arranged at the upper part of the back surface of the additional unit container 81. The busbar units 1 to 70' house three conductors 74' constituting the busbar BUS' in a container 71', and the conductors 74' are supported by insulating spacers 72- provided at both ends of the container 71'. has been done. This bus unit 70'
The flange portion 71b' provided around the hole 71a of the container 71' is used to attach the additional container 810 equipment 2
3- The additional unit container 8 is airtightly connected around the borehole 83.
It is attached to 0. Its configuration is similar to that of the embodiment shown in FIG. 1, and the electrical construction of this embodiment is as shown in FIG.

In the embodiment shown in FIG. 1, the fixed electrode 36 of the grounding device ES2 is attached to the upper surface of the unit container 1 (for pull-mounting, a hole is provided, and the fixed electrode 36 is inserted from the outside of the container 1 through the mounting hole G-J).
6 may be installed.

In this way, when a hole is provided for installation, the hole is
The device mounting shown in the figure can be used as the hole 85, so
When configuring a switching circuit with a double busbar configuration as shown in FIG. 4, there is no need to create holes for installing equipment, and unit containers can be standardized.

The configurations of the line unit 60 and additional unit 70 are not limited to those shown in the above embodiments, and the line unit and additional unit can be configured in various configurations depending on the configuration of the electric station. In addition, lines with various circuit configurations] and additional units are standardized and prepared, and by using these 24- alone or in appropriate combinations, it can be adapted to electrical stations with various configurations. Gas insulated switchgear can be obtained.

Effects of the Invention As described above, in the present invention, all of the circuit breakers and new line switches, which are relatively large and take up space, are arranged with their respective axes parallel to the front and rear sides of the unit container. The depth dimension of the container can be reduced, and the building that houses the gas-insulated switchgear can be made smaller. In addition, by supporting the circuit breaker on the top surface of the unit container, a large working space can be secured above the circuit breaker, making it easy to install and remove the circuit breaker, and maintain, inspect, and repair the circuit breaker. can be facilitated. Furthermore, since the busbar is arranged using the dead space above the cable head, the space can be used effectively.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing the internal structure of an embodiment of the present invention viewed from the side and taken along a vertical plane, Fig. 225- is a front view of the embodiment, and Fig. 3 is a cross-sectional view of the embodiment. FIG. 4 is a cross-sectional view showing another embodiment of the present invention, and FIG. 5 is a single-line diagram showing the electrical structure of the same embodiment. 1...Container 1-Container, 2-5...1st to 4th equipment mounting hole, 10... Frame, 31... Insulating support (insulating spacer), 60... Line Unit, 70.7
0'...Busbar unit, 71.71'...m line switch, 80...additional unit, 81...additional unit container, CB...breaker 1, DSl...track side disconnector , DS2. DS3...Bus bar side disconnector, ESl, ES2
...Grounding device, PT...Instrument transformer, CT...
Current transformer, Bus, BUS-...Bus bar, CHd...Cable head. 26- Procedural amendment (March 27, 1980, Kazuo Wakasugi, Commissioner of the Japan Patent Office, 1, Indication of the case, Japanese Patent Application No. 130352/1982, 2, Name of the invention, gas insulated switchgear 3, Person making the amendment) Relationship to the case Patent applicant (394) Nissin Electric Co., Ltd. 4, Agent 4-31-6 Shinbashi, Minato-ku, Tokyo 6th floor, Bunchu Building Specification 6, Contents of amendment Specification printed in the size of the stipulated type No changes have been made to the written content.) will be corrected as shown in the attached sheet. -'m-ko 5/Konohe, 77

Claims (1)

[Claims] A bus-side disconnector whose one end is connected to the busbar, a circuit breaker whose one end is connected to the other end of the bus-side disconnector, and a cable of a line to be connected to the busbar at the other end of the circuit breaker are connected. The necessary equipment, including the line-side disconnect switch placed between the cable head and the line-side disconnector, is housed in a common unit container that is generally rectangular or cubic in shape, and is used for one line.
In a gas-insulated switchgear configured to form a closed circuit, the circuit breaker and the line-side disconnector are arranged vertically on the front side of the unit container, and their respective axes are arranged in parallel with the front surface of the unit container. The busbar side disconnector is arranged on the rear side of the unit container so that its axis is parallel to the rear surface of the unit container, the cable head is attached below the busbar side disconnector, and the busbar side disconnector is disposed on the rear side of the unit container. The bus bar is disposed at the upper part of the outside of the rear surface and penetrates the rear wall of the unit container to pass through the f! 1li
1. A gas insulated switchgear characterized in that: l is connected to the busbar side disconnector.