JPS6055813A - 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 Industrial Application The present invention relates to a gas insulated switchgear installed in electrical and atmospheric pressure systems such as substations.

Prior Art Recently, gas insulated switchgears have been sold to substations, etc.
-b, which has a structure in which multiple devices constituting the switchgear are housed in a common unit container filled with relatively low-pressure insulating gas.
is attracting attention. According to this structure, compared to a type of gas-insulated switchgear in which each device is housed in an individual tubular container and the containers are connected to each other via an insulating spacer, the 414-frame structure can be constructed much more easily. It is also 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 make the equipment as small as possible, but the height of the building is determined by human habitability and workability. In general, the height of a building cannot be reduced to less than 2.5 to 3 m. In addition, the width of the building is determined by the width of the switchgear housed inside the building, but when using gas-insulated switchgear that consists of three-phase necessary equipment housed in a common unit container, the unit of the switchgear is Since the width of the container\J method is approximately determined by the insulation distance between the phases, there is a limit to reducing the width dimension of the container. Therefore, in order to reduce the size of the space that accommodates this type of device, it is necessary to reduce the depth of the unit container.

In addition, in conventional gas-insulated switchgear, the operating devices for circuit breakers and disconnectors are distributed, making maintenance difficult. There was a drawback that the structure became complex. Furthermore, in the conventional apparatus, the connection of the equipment to the container was made through openings provided on multiple sides of the container, making the structure of the container complicated and making it difficult to process the container. It had the drawback of being troublesome.

OBJECTS OF THE INVENTION An object of the present invention is to reduce the depth of a unit container for housing equipment comprising a switchgear (?l). west,
Another object is to provide a gas insulated switchgear which facilitates maintenance and inspection by distributing the operation box 23 containing the operation device to the front of the container.

Structure of the Invention The present invention provides a bus-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 a circuit breaker having the other end connected to the busbar. A gas-insulated switchgear constitutes a switching circuit for one line by equipment including a line-side disconnector disposed between a cable head and a cable head to which a cable of a line to be connected is connected, the gas-insulated switchgear according to the present invention , the circuit breaker is located on the front side of the unit 1~container for ¥1
The units 1 are arranged at different positions and are taken perpendicularly to the vessel through an opening made through the ceiling of the vessel.The line side disconnector and bus bar The side disconnectors are disposed coaxially in a horizontal direction (with their respective axes oriented in the vertical direction, and arranged one above the other inside the rear side wall of the unit container).

A cable head container whose rear end protrudes rearward from the back surface of the unit container is fixed to the upper surface of the ceiling of the unit container, and the cable head is directed downward inside the rear end of the cable head container. F=I is taken in this posture.

Further, a bushing or an insulating spacer is installed so as to airtightly close an opening provided in a portion of the ceiling of the unit 1-container facing the line-side disconnect switch. A connecting conductor extending for the same purpose is supported by the bushing or insulating base, and one end of the connecting conductor is connected to the cable head in the cable head container and the line side disconnector, and the other end is connected to the cable head container. The busbar container is connected to the soil part of the container, and is connected to the cable head, and the busbar container is connected to the earth part of the container, and is operated by the circuit breaker, each disconnector, and each earthing device.
The operator box housing the + device is the Oi of the unit container.
They are arranged in clusters on the j-plane side.

The above J, Uni, the most doll's shield l17i Kaoru'R's G
The circuit breaker is placed vertically on the i+ side, and behind the circuit breaker, the Bl line side and track side new circuit devices are arranged vertically with their respective axes facing vertically, - 1. Leek 1 ~ The put space in the container can be reduced, the L'U space can be used more efficiently, and the container can be trimmed down and the height dimension can be reduced. Furthermore, by arranging the cable head container above the unit container, it is possible to reduce the space that needs to be secured behind the back of the device.

Therefore, together with the ability to reduce the depth dimension of the unit container itself, it is possible to significantly reduce the installation space for the equipment, and it is possible to downsize the building in which the gas insulated switchgear is housed. I can do it. In addition, sufficient space can be provided between the top of the Conit container and the large moon of the building, ensuring a wide working space above the milgi device.
can be read. Therefore, the circuit breaker can be easily installed and removed, and the circuit breaker can be inspected and repaired easily.Also, as mentioned above, the cable head container can be mounted on the top of the unit container. Because the installation position of the couple head is higher, cable pips 1~ can be saved.
l'1J or shallower. Furthermore, if the control boxes are arranged together on the front side of the unit container as described above, maintenance and inspection of the control devices can be done on the front side of the container.
q, so work efficiency can be improved.

Example Hereinafter, a detailed description of the present invention will be given with reference to the accompanying drawings.

FIG. 1 shows an embodiment in which the present invention is applied to a gas-insulated switchgear placed between the busbar of a single-bus Suginari electric station and a line (for example, a feeder) connected to the I'1 line. In these figures, C1 (d3) is a vertically long, rectangular, rectangular metal unit container. To the unit 1, the top part 1a of the container 1 is provided with an opening 3 for connecting the circuit breaker (circular cutoff lid removal hole 2 and first hole 2 for connecting the circuit breaker), etc. .

Shutoff 0:; The cutout hole 2 is located close to the front side wall 1b of the container 1) and is spaced at a predetermined interval in the lateral direction of the container 1 (in a direction perpendicular to the plane of the paper in FIG. 1). 3 pieces with IJ (for 3 phases)
The inner diameter of each hole 2 is assembled externally.
/,: The size is set so that the circuit breaker can be inserted from the - point. [Part 1 is attached to the back side wall 1C of container 1]:
:', -J' ly (in the V position -) C part 3
Three circuit breakers are installed at a predetermined interval tJ in the lateral direction of the container 1, and the three circuit breakers are installed at the frontage tXL of each of these three circuit breakers. It is being taken. Second device connection openings 4 are provided at positions corresponding to the three openings 3 of the bottom wall 1d of the container 1, respectively. The above-mentioned circuit breakers are installed in a row of three (for three phases) in the horizontal direction. and opening 3. /I are installed so that their respective axes are located on the same vertical plane (a vertical plane parallel to the plane of the paper in Figure 1), and these can be mounted using the holes, J: and frontage. Separate devices for each phase to be removed are arranged along the same vertical plane (respectively). Mounting flanges 2a to 4a are provided on the periphery of the portion 4 between the holes 2 and 4, respectively, and each mounting flange is provided with a screw hole into which the mounting holes 1 to 1 are screwed.

The unit container 1 is fixed on the installation base B and 1a
It is fixed vertically on a pedestal 5 .

In this embodiment, in the container 1 of the unit 1, three phases of equipment constituting a switching circuit for a single bus 1j as shown in the single line diagram of FIG. 3 are housed.

In Figure 3 a3, DSl and D32 are the bus-side disconnector and line-side disconnector, respectively, CI3t; 1-person grounding for circuit breaker inspection, E
S3 is a line grounding device, r3 U S is a bus bar, CHd is a cable head, CT k, and i are a current transformer C. The 111 line side disconnector DS1 is - *11 is the fiJ line +3 LJ
The (l!! end of the disconnector is connected to one end of the circuit breaker CB. The other end of the circuit breaker CB ~ pull l
11. A line-side disconnector DS2 is placed between the terminals CI-1d, and a line grounding device ES3 is placed between the cable head side terminal of the disconnector DS2 and the ground.11. Shita m
Between one end and the other end of the disconnector CB and the ground (the first and second 12 disconnector inspection grounding devices ESI and ES2 are arranged @8, respectively, the I'd line side...i path and the line-side disconnectors DS1 and 1] S2's contactors are the first and second circuit breakers IAj and 0, respectively, and the grounding device ES for inspection.
It also serves as a movable electrode for ES1 and ES2.

J shown in Figure 1: Sea urchin 3 phase circuit breakers (3 units) CB
are respectively penetrated through three cut-off lid removal holes 2 provided in parallel on the upper surface of the unit container 1, and are parallel (perpendicular) to the front surface 1C of the container 1. Each circuit breaker CB
For example, an interrupting section consisting of a movable contact J3 and a fixed contact child arc extinguishing mechanism is housed in an independent cylindrical insulating container 11 filled with SF6 gas at high pressure, and the container 11 is connected to the fixed contact. A fixed side terminal 12 and a movable side terminal 13 connected to a movable contact are provided. One end of the containers 11 of these three circuit breakers CB is connected to a metal plate 18 which also serves as a cover plate for airtightly closing the girder hole 2. Each circuit breaker CB is inserted into the unit container 1 through the hole 2 and arranged vertically so that its axis is parallel to the front side wall 1b of the container 1. The unit is attached to the flange 2a for the hole 2 by a port 1- from the outside of the unit container.

Attachment [The connecting portion between the plate 18 and the flange 2a is formed airtight, so that each hole 2 is airtightly closed when the circuit breaker is housed in the unit container. The space each circuit breaker CB occupies in the unit container in the depth direction can be minimized since each circuit breaker CB is placed in the same position.

The three-phase line-side disconnect switch DS2 and the bus-side disconnect switch DS1 are arranged vertically on the back side of the container 1 with their respective axes oriented vertically. In this embodiment, the bus-side disconnect switch DSI is placed below. The three-phase busbar side disconnector DS1 is supported by an insulating support 21 fixed to the inner surface of the rear side wall 1C of the unit container.
The axes of each fixed contact and movable contact are parallel to the back surface of the unit container 1 (extending in the vertical direction). The insulating support 21 supporting the disconnector DS1 of each phase is made of a molded article of insulating material such as poxy resin, and has a base 21a fixed to the back side wall of the container 1 and a base 21a protruding diagonally from the base. Dendritic protrusion 21b
, 21C, and the fixed contact 23 and movable contact 2/'l of the disconnector DS1 are supported at the tips of the protrusions 21b and 21c, respectively. Disconnector DSI for each phase
The fixed contact 23 consists of tulip contactors 1 to 1 arranged in a shield, and the movable contact 24 ('
- Rod-shaped contact 2/I linearly driven so as to approach and separate from
<'1-)'l- from the one in which the current collecting contacts 1 to 1 in contact with the contactor 24a are arranged inside the shield.

The movable contactor 24 is connected to the fixed side terminal 12 of the four-disconnector CB via a connecting conductor 25.

A three-phase line-side disconnector DS21 is supported on an insulating support Ijj body 31 fixed to the upper back surface of the I-chiller 1 to the container 1. The insulating support 31 consists of a base 311 fixed to the rear side wall of the unit container 1 and dendritic protrusions 31bJjJ, 31C, etc. diagonally protruding from the base 312; The fixed contacts 33JJ and the movable contact 34 of the disconnector DS2 are respectively attached to the tips of the disconnector DS2.
is supported. The fixed contact 33 consists of a tulip contact arranged inside a shield, and the movable contact r3'l consists of a rod-shaped contact 34a disposed inside the shield, whose core wire is displaced by being driven by an operation shaft (not shown). The fixed contact 32 and the movable contact 33 are arranged coaxially with each other. 3-phase disconnector D
S2 are arranged at equal intervals in a direction perpendicular to the plane of the paper of FIG. It is connected.

The fixed contact 33 of the disconnector DS2 is equipped with a track grounding device ES.
Three fixed electrodes 41 are provided. The movable electrode 42 of the grounding device ES3 is attached to an operating shaft 43 that is rotatably supported by a frame (not shown) provided at the upper part of the back side wall inside the chive 1 to the container 1, and the movable electrode 4
2 is driven by an operating shaft 43 and rotates between a grounded position where it contacts the fixed electrode 41 and a non-grounded position which is separated from the fixed electrode 41 by a predetermined angle.

The above-mentioned disconnectors DS1 and DS2 are provided so that the respective movable contacts 24 and 34 are vertically opposed to each other, and a grounding fixed electrode 45 is disposed between the two movable contacts. This fixed electric bridge 45 is constructed with +M so as to contact the movable electrode (to be described later) from both upper and lower sides, and is supported by brackets 1-4G fixed to the inside of the wall on the y7 side of the unit container 1. 'l has been (is).

Rod-shaped contact 24 of the movable contact 2/l of the disconnector DS1
When the disconnector DSI enters the 18-way state, the fixed contact 23 protrudes to the opposite side.
The grounding device for inspecting the circuit breaker of this moving contactor 241 [S10 is designed to also serve as the driving electrode. When the rod-shaped contact 34a of the movable contact 34 of the line-side disconnector DS2 also protrudes to the opposite side of the fixed contact 33 and comes into contact with the fixed electrode 45. υ, the movable contact 34
J, which also serves as the movable electrode of the second electric appliance inspection grounding device ES2.

A Kusol head container 50 is arranged on the upper surface of the large moon part of the container 1 to the container 1. The bottom wall of this container 550 is provided with three openings 51 that are aligned with the three openings 11 3 of the unit container 1, and flanges provided around each opening 11 51 are provided. 51 El is 21 Corresponding number of devices of knit container 1 (=i circumference of LJ hole 3) flange 3a
is hermetically connected to the The container 50 is installed such that one end thereof protrudes rearward from the rear surface of the unit container 1, and three flaps are provided at the rear part of the bottom wall 52 of the container 50, which protrudes rearward from the rear surface of the unit container 1. (A hole 52a is provided). The mounting holes 52a of 3ff^1 are arranged in a direction perpendicular to the plane of the drawing, and the three-phase cable head CH is passed through each of these three mounting holes in an airtight manner.
d is taken in a downwardly oriented position (=j). Several bushings BS are inserted through the opening 51 of the container 50 and the opening 3 of the container 50 in an airtight manner. It is connected to the fixed contact 33, and the other end is connected to the terminals of the cable heads CI-1 and 6 through the connection conductor 56. Each cable head Cl-1d has a motherboard rABtJ.
A connector 61 provided at the tip of a cable 60 constituting a line (for example, a feeder) connected to S via an opening/closing circuit is connected to the container 1 so that it can be inserted and removed from the outside. In addition, a current transformer CT is connected to the bushing BS.
There is.

Attach the cable head container 9 to the cable head container placed in the soil of the Otsuki part of the container 1 to container 1 described above.
The height of the cable/bed or C can be raised higher from the installation surface of the equipment. - is omitted.

The bottom wall 1 of the unit container 1 (the lower blade of j has a radiation capacity of 0
is installed. Busbar container 700 people/months B? Three openings 71 corresponding to each of the three spaces 1-1 of the container 1 to 4 of the container are provided, and three openings 71 are provided around each space L1 part 71. The flange 71a is airtightly connected to the flange 4a around the corresponding wiper removal hole 4 of the N-ray container 1. .72°... are provided protrudingly, and each brown 1 to 72 is fastened to the bottom wall of the unit container 1 with a bolt to fix the bus bar container 70 to the unit container 1. Attaching the first line container 70 1112 easily η
Therefore, a space is provided between the bottom surface of the container 70 and the installation base B. Three-phase bus conductors 7314 to 73w constituting the bus bar BtJS are housed in the container 70,
These 11 busbar conductors are respectively provided on two side walls of the container 70 facing in a direction perpendicular to the paper plane of FIG. 1 and supported by insulating supports (not shown). Unit container 1
Each opening 4 and each frontage 71 of the bus bar container 70 share an axis 1 with the fixed contact 23 of the disconnector DSI of the corresponding phase.
A wire-sealed spanner 74 is installed to airtightly close the rain opening. A connection conductor 75 is provided through each insulating spacer 74, and one end of each rear connection conductor 5 is connected to the fixed contact 23 of the disconnector DS1 of the corresponding phase, are connected to the respective bus conductors.

The front side wall 1d of the unit container 1 supports operation boxes 80 and 81 that house the operation instruments of each device.

Also, an operator box 80 housing a circuit breaker operator is supported at the upper part of the front side wall of the unit container 1.
An operating unit box 81 is supported below the operating unit box 80, which houses operating units for operating the disconnectors DS1, DS2 and the earthing device lEs1 and ES3. The operating device in the operating device box 80 (connected to the operating lever 20b that operates the circuit breaker CB 21), the operating device in the operating device box 81 is connected to the side wall of the unit container 1 airtight through a link mechanism or the like. It is connected to the operation pull-out shaft of a predetermined device pulled out through the unit.The operation shafts of the disconnectors DSI and one S2 are interconnected inside the unit container to connect both disconnectors. The operating shafts of both enclosures may be connected to the operating device via a common pull-out shaft.

Gas insulated 17i1 open equipment for one line (
Line unit 1-) is configured, unit container 1
, Cable Head Takeaway 'Kegawa '7V Z 50 and 1
The inside of the T-line container 70 is filled with SIG gas at a low pressure of 21<9/cm or more.

When a plurality of circuits are installed in a substation, a plurality of gas insulated switchgears shown in F are covered with gold film, and the respective wires BUS are connected to each other. When installing a plurality of gas insulated switchgears of the above embodiment, the unit containers 1, 1, etc. of the plurality of gas insulated switchgears are arranged side by side in a direction perpendicular to the paper surface of FIG. Insulating space between bus bars υ74
They are interconnected by conductors that pass through them. By arranging it in this way, it is possible to form a row panel with all the control boxes lined up in front, which not only makes maintenance and inspection easier, but also improves the appearance. be able to. Further, since there is no connection part with other equipment on the lateral side of each unit container, a predetermined number of unit containers 1.1. ... can be arranged closely together, and the length of the row of panels can be shortened to reduce the installation space for the device.

As described above, in the present invention, all of the circuit breakers and disconnectors have their respective axes oriented in the vertical direction.
Therefore, the depth of the space these devices occupy within the unit container can be reduced. In addition, the circuit breakers are placed one on top of the other on the front side of the unit container, and the busbar side and line side disconnectors are arranged vertically behind them, making it possible to reduce the height of the space occupied by these devices. can.

Therefore, the depth and T3J length of the unit container can be reduced, and the device can be downsized by reducing the size of the unit container.

As mentioned above, the operation is required.
~ When placed inside the container 1, the busbar capacity 2; Connection with the Conite container J) J, σ can be easily disconnected. Therefore, for example, if a failure occurs on the bus bar, the bus bar container can be easily replaced.

In the above embodiment, the bushing BS is installed by passing through the opening 3 airtight (J), and the current transformer CT
Although the mounting number is d5, it is also possible to attach a cable-penetrating type of CT to the cable 60 by attaching it to the outside of the container 50. In this case, an insulating spacer is used instead of the bushing BS, and the connecting conductor connecting between the disconnect switch DS2 and the Kelp head C11d is supported on the insulating spacer.
You can also play sea urchin.

In the above embodiment, the bus BUs are made into units for each line and stored in independent containers, but a common bus unit is configured for a plurality of line units 1-, and the common bus unit is l-container for multiple line units 1~
unit container 1, 1. It may be possible to connect to...

Next, FIG. 2 shows an embodiment in which the present invention is applied to a switching circuit with a double bus configuration in which each line is connected to two buses BUs and BUS'. One way is shown in the figure. In this embodiment, the heights of the unit 1 to the container 1 are set higher than in the embodiment shown in FIG. It is gas-separated into a first chamber (2) having the same volume as the unit 1 to container in the illustrated embodiment and a second chamber (2) having a smaller volume than the -1st seedling.

In the first chamber (1), a circuit breaker CB and a disconnector 1) Sl are installed.

DS2 and grounding device ES2. ES3 is housed in the second chamber, and a bus-side disconnector DS3 connected to the bus BUs' is housed in the second chamber.
A grounding device FS1 is housed therein.

In this embodiment, an opening 7 is provided at the bottom of the back of the first chamber (2), and a disconnection Z;
``The opening 21 is configured to airtightly open the opening 7 and also serve as an insulating cover.To describe in more detail,
The insulating support body 21 includes a flange portion 21f connected to the periphery of the frontage portion 7, and a bellows-shaped protrusion portion 21gJ3 and 21h that protrude into the inside and outside of the unit 1 to the container 1, respectively, and a flange portion 21f that protrudes into the unit container 1. It consists of dendrites 211 that protrude obliquely upward from the protrusion 21g. Projection part 21g
The conductor 2G provided by penetrating OJ: and 21'h.
The fixed contact 23 of the disconnector DS1 is connected to the end, and the movable contact 24 of the disconnector DSI is connected to the tip of the protrusion 21i.
, I have been. Other devices housed within the first VI;
The configuration is similar to that of the embodiment shown in FIG.

A frontage part 7' is provided at the lower part of the back of the second palm.
- and the movable contact 24 - busbar side disconnector DS
3 has been taken. The structure of the insulating support 21' is similar to that of the insulating support 21' that supports the disconnector DS1 in the first chamber 1.
The structure of 1 is exactly the same. Further, the structure of the disconnector DS3 is approximately the same as that of the disconnector DS1, but in this example, the movable contact 23 of the disconnector DS1 does not also serve as a movable electrode of the grounding device, and the movable contact 24 is fixed. It is designed to come into contact only with the contact 23. Similarly, the movable contact 24' of the disconnector DS3 is adapted to come into contact with and separate from only the fixed contact 23'. A busbar container 70= containing a busbar BUS' is connected to an opening 7' on the back side of the second chamber (2).

The structure of this busbar container 70' is similar to the structure of the busbar container 70 described above. Furthermore, the connection structure between the bus line BUS and the disconnector DS3 is exactly the same as the connection structure between the bus line BUS and the disconnector DS1.
The ring bodies 73u- to 73w- are connected to the fixed contact 23' of the disconnector DS3 of the corresponding phase via the connecting conductor 26' passing through the insulating support 21' supporting the disconnector DS3 of the corresponding phase. It is connected to the. The bushing BS'' is taken out by airtightly penetrating the fi cutting plate 6 which is cut 41 times between the first chamber (2) and the second chamber (2). is connected to the tip contact 15 connected to the fixed side terminal at the lower end of the circuit breaker CB.Furthermore, at the lower end of the center conductor of the bushing BS, there is a fixed electrode 8a constituting the grounding device [Sl-]. The fixed electrode 88 is connected via the connecting conductor 9 to the nJ moving contact 24' of the disconnector DS3.
- A movable electrode 8C is installed (1). An operator box 82 containing an operator for operating the disconnector DS3 and the grounding device [81' is installed at the front of the second chamber (1). The operating device in the operating device box is connected to the drawer shaft of the container 1, which is connected to the operating shaft of the disconnector D S 3 i15 and the grounding device ES1', via a link mechanism or the like.
I have been (I have been)

In addition, in this embodiment, the cable head capacity::':+Fl
A cable head attachment part 52Δ having an inclination f' is provided at the rear end of the bottom part of the O, and a couple head CHd is attached to the recessed part.

As mentioned above, the present invention can be applied to gas-insulated switchgear with two-handed m-wire + M configuration, and most /V parts are They can be shared and parts can be standardized.

In the embodiment shown in FIG. 2, the containers 1 to 1 are configured to have the same size as the embodiment shown in FIG. The unit container and the additional unit container may be connected by appropriate means.In this case, the connection structure between the unit container and the additional unit container may be arbitrary, and both may be connected by bolts. The connection may be removable or by welding.

Effects of the Invention As described above, according to the present invention, the circuit breaker of the last doll is arranged vertically on the front side of the container, and the busbar side and track side disconnectors are arranged behind the circuit breaker (respectively). Since they are arranged vertically with their axes oriented vertically, it is possible to reduce the deck space inside the unit container and make effective use of the space. By arranging the cable head container above the unit container, it is possible to reduce the space required at the rear of the device. By being able to reduce the depth of the container itself to \1, it is possible to significantly reduce the installation space for the equipment, and it is possible to downsize the building that houses the gas-insulated switchgear. In addition, by providing a sufficient distance between the top surface of the unit container and the ceiling of the building, it is possible to secure a wide working space above the circuit breaker. IB2 work can be easily carried out, and circuit breaker maintenance and inspection work can be easily carried out.Furthermore, as mentioned above, when the cable head container is attached to the top of the Units 1 container, Since the position of the Kusol l bed is in a lagoon, it is possible to omit or shallowly go to the Couple Pit 1.Furthermore, if the operation box is assembled on the front side of the unit container as described above, Since the maintenance and inspection work of the operating instruments is performed on the front side of the container, work efficiency can be improved.In addition, other instruments can be connected only on the back side of the container. By doing this, you can easily remove up to h'4 of the container by 11?I.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of an embodiment of the present invention viewed from the side and cut vertically to show the internal structure; Fig. 2 is a cross-sectional view of another embodiment of the invention; Fig. 3; and FIG. 4 are single line diagrams showing the electrical configuration of the embodiments shown in FIG. 1 and FIG. 2, respectively. 1...Unit container, 2-4...1st to 3rd equipment mounting hole, 21.21'...Insulating support that also serves as an insulating spacer, 23.23'-...Fixed contactor , 24
. 24'... Movable contact, 31... Insulating support that also serves as a bushing, 32... Fixed contact, 33... Movable contact, 50... Cable head holder (container for J & -J) , 70° 70-... bus bar container, CB... circuit breaker,
I)31. DS3...Busbar side disconnector, DS2...Line side disconnector, [Sl, ESl, ES2...Cut off! I7
Grounding device for equipment inspection, CT...Current transformer, [3US, [
3US"...IU line, CI-16...cable head. Fig. 2 Tewaneyama JE? Kidnapping (voluntary) March 27, 1981 Kazuo Wakasugi, Commissioner of the Japan Patent Office, 1, of the incident Indication Patent application 160/1877, July 2, Name of invention Gas insulated switchgear 3, Relationship to the case of the person making the amendment Patent applicant (394) Nissin Electric Co., Ltd. 4, Agent Minato-ku, Tokyo Shinbashi 4-31-6 Bunzan Building 6th Floor Specification p) 6. Contents of the Amendment Add a copy of the letter 1 (no change to the content) printed in the prescribed size of type as shown in the attached supplement 1 “I do.” -

Claims (1)

[Scope of Claims] A bus-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 being connected to the busbar. In a gas-insulated switchgear in which a switching circuit for one circuit is constructed by equipment including a line-side disconnector disposed between a cable head to which a cable of a line to be connected is connected, the circuit breaker is connected to the unit container. The track side disconnector Jj is cut perpendicularly to the unit/container through an opening provided near the front side and provided through the large moon part of the unit container.
J: and busbar side disconnectors are arranged one above the other inside the rear side wall of the unit container with their respective axes oriented in the vertical direction, and A couple head container whose rear end protrudes rearward beyond the back surface of the unit container is fixed to the upper surface of the ceiling, and the double head is attached to the inner side of the rear end of the cable head container with the double head pointing downward. n Airtightly close the frontage provided in the large part of the knitted container at the part facing the line-side disconnector. A connecting conductor extending coaxially with the side switch is supported on the bushing or the insulating base;
One end of the connecting conductor is connected to the line-side disconnector in the unit container, and the other end is connected to the cable head in the Kusol head container, and the Bl line container is connected to the T section of the unit container. 1) An operator box containing an operator for operating the circuit breaker, each disconnector, and each grounding head is assembled and arranged on the front side of the container. Gas insulated R11 device that indicates 1SJ.