JPS6096111A - 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 OF THE INVENTION Recently, gas-insulated switchgear installed in substations, etc., has attracted attention, with a structure in which multiple devices making up the switchgear are housed in a common metal container filled with relatively low-pressure insulating gas. . According to this structure, the structure can be much simpler than that of a gas-insulated switchgear in which each device is housed in a separate annular 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 achieved.

By the way, in this type of device that has been proposed so far,
a busbar, a cable head connected to a cable pulled out from the busbar, a busbar side disconnector and a trackside disconnector, and a cable head connected to the busbar via the busbar side disconnector and the cable head connected to the trackside disconnector; Since the circuit breaker and circuit breaker connected through the circuit were installed in a common container, if an accident occurred at any point, the entire operation would have to be stopped, which was undesirable. In addition, when assembling the device, the parts of each device were inserted into the container through hand holes provided in the container, and each device was assembled inside the container. This required assembly work in a narrow space, making it difficult to assemble the device. It was very troublesome. Furthermore, during maintenance, inspection and repair, it is necessary to remove the parts of each device inside the container through the hand hole and then take each device out of the container, which has the disadvantage of making inspection and repair work very troublesome. . In addition, the conventional structure has the drawback that it is difficult to standardize parts, resulting in a significant increase in cost.

OBJECT OF THE INVENTION The object of the present invention is to provide a gas-insulated switchgear system that allows easy assembly of equipment, allows for inspection and repair by separating only specific parts, and facilitates standardization of parts. The goal is to provide equipment.

Structure of the Invention The present invention provides at least one set of busbars, a cable head connected to a cable pulled out from the busbar, a busbar-side disconnector, a line-side disconnector, and a cable connected to the busbar via the busbar-side disconnector. and a circuit breaker connected to the cable head via the line-side disconnector. a main unit configured by storing the circuit breaker and disconnector in a main container; a bus unit configured by storing the set of busbars together with the busbar-side disconnector in a busbar container; The cable head unit is configured by being attached to the head container. First and second busbar mounting holes and cable head mounting holes are provided vertically on the side surface of the main container, and the busbar unit is provided with a number of holes for the first and second busbars. ] The cable head unit is connected to one of the holes in a gas-isolated manner to the interior of the main vessel, and the cable head attachment is connected to the hole. The operating devices for the circuit breaker and the line-side disconnector are housed in a main container-side operating device storage box that is supported against a surface of the main container opposite to the surface on which the device number A4 () hole is provided. The operating device of the bus-side disconnect switch is housed in a bus-bar container-side operating device box supported with respect to the bus-bar container.

As mentioned above, the gas insulated switchgear of the present invention is composed of the main unit, the busbar units 1 to 1, and the cable head unit, so it is only necessary to assemble each unit individually and connect them to each other later. can be easily assembled. In addition, since the busbar unit and the main unit are separated by gas, in the event of an accident with the busbar unit, the busbar unit can be separated from the main container and repaired without affecting the main unit. When an accident occurs, the main unit can be repaired without disconnecting the main unit from the bus unit and causing a power outage to the bus. In addition, since several holes for the first and second busbars and a hole for the cable head are provided on the side of the main container, it is possible to construct an open/close circuit with a double busbar configuration, as well as for the first and second busbars. By using one of the two busbar mounting holes, a switching circuit with a single busbar configuration can also be constructed. In this case, since the main unit, mta unit, and cable head may have a common configuration in either configuration, it becomes easy to standardize each container and the equipment arranged in each container.

Example The present invention will be described in detail below with reference to the accompanying drawings.

Figures 1 to 3 show an embodiment in which the present invention is applied to a switchgear with a double bus bar configuration. Figure 1 is a front view, and Figure 2 is a cross section taken along line II-It in Figure 1. FIG. 3 is a single line diagram without showing the electrical configuration of each phase of the same embodiment.

In FIG. 3, 881 and BS2 are the first and second bus bars, respectively, and CB is a circuit breaker. 2 bus lines BS1 and BS2, respectively. The other end of the circuit breaker CB is connected to a cable head CH via a line-side disconnector DS2, and a cable C is connected to the cable head CH. The above is the basic configuration of a switchgear with a double busbar configuration, but in reality, grounding devices are further installed at appropriate locations as necessary, and current transformers, lightning arresters, instrument voltage transformers, etc. is set number. In this embodiment, grounding bags for circuit breaker @ES1 and ES2 are placed between one end of the circuit breaker CB and the ground, and between the other end and the ground, respectively.
A track-side disconnector grounding device ES3 is provided between the track-side terminal of the track-side disconnector DS2 and the ground. In addition, a current transformer CT is installed on the conductor part connecting the circuit breaker CB and the line-side disconnector DS2, and an 81-wire voltage transformer LPT is installed on the conductor part connecting the disconnector DS and the couple head CH.
is connected. Furthermore, disconnector D of cable head CH
A lightning arrester A is arranged between the terminal on the S2 side and the ground.

In this embodiment, two sets of gas insulated switchgear GIS having the above configuration are installed, and the two sets of gas insulated switchgear GIS are installed side by side in the horizontal direction as shown in FIG. There is. The mechanical configurations of both gas insulated switchgears are exactly the same. The internal structure of each gas insulated switchgear G'IS will be explained below with reference to FIG.

In Fig. 2, 1 is a main container formed vertically, and this main container is placed on an installation base 2 with its longitudinal direction facing the vertical direction.
It is supported on a pedestal 3 via a pedestal 3. The main container 1 consists of a main container body 100 formed in a vertically long cylindrical shape, and a top 1101 and a bottom M102 that airtightly close the upper and lower openings of the main container body 100. On the side surface, holes 103 and 104 for first and second busbar attachments and a hole 105 for cable head attachment are provided in order from top to bottom in a straight line.

These mounting holes are formed by welding a cylindrical tubular body 106 to the periphery of the hole provided in the main container body 100. 103a to 105a are provided.All of these mounting holes are formed to have the same diameter, and each mounting flange is provided with holes for inserting bolts at the same pitch to standardize the mounting holes. On the front side of the main container 1 (opposite to the mounting holes 103 to 105), holes 107 and 108 are provided vertically for mounting equipment. Number of equipment 1. The holes 1.07 and 108 are formed by welding the tubular body 109 to the periphery of the hole provided in the side wall of the main container body, similar to the holes 103 to 105, and the equipment is installed in the hole. Mounting flanges 107a and 108a are provided at the open ends of 107 and 108, respectively. For mounting equipment, holes 107 and 108 are formed to have the same shape and size, and the holes for mounting both equipments are standardized.

A board 110 is attached to the equipment so as to airtightly close the equipment opening hole 107 provided in the upper part of the front side wall of the main container 1, and a three-phase circuit breaker CB is supported on the board 110. has been done. Each circuit breaker CB is a gas circuit breaker that houses a fixed contact, a movable contact, and an appropriate arc extinguishing mechanism in a container 4, and one end of the cylindrical container 4 has a fixed side terminal electrode 5 connected to the fixed contact. A movable side terminal electrode 6 connected to a movable contact is provided on the side surface of the container 4.

The three-phase circuit breakers CB are arranged triangularly so that the central axis of each container 4 extends parallel to the front side of the main container from the back side of the main container through the vertices of the triangle imaginary on the vertical plane. 4 is the mounting hole 1 provided in the plate 110 for mounting the disconnector.
10a@ through which the equipment mounting is supported by the plate. A flange 4a is provided at the end of the container 4, and the flange 4a is airtightly connected to the mounting hole 11a. A mechanism section 7 housing an operating mechanism for operating the movable contact of the circuit breaker is attached to the end of the container 4 located outside the main container.
The inside of the container 4 is hermetically closed by the mechanism part 7. The mechanism part 7 can be removed from the container 4, and by removing this mechanism part, the inside of the container 4 of each circuit breaker can be inspected without opening the inside of the main container. There is. In this embodiment, the three-phase circuit breaker CB
Each circuit breaker is arranged so that the fixed side terminal electrode 5 of each circuit breaker CB faces the hole 103, and the fixed side terminal electrode 5 of each circuit breaker CB is mounted on the part facing the hole 103. A conductor connection portion 5a is provided.

Further, fixed electrodes 8 and 9 for a grounding device are provided above the fixed side terminal electrode 5 and movable side terminal electrode 6 of the three-phase circuit breaker CB, and the fixed electrode 8 and 9 are provided on the upper part of the main container 1. 9
At the same time, movable electrode units l-10 and 11 for the grounding device, which constitute the ground waves for the circuit breaker @ES1 and ES2, respectively, are taken.

The movable N-pole units 10 and 11 for the grounding device are fixed electrodes 8
A rod-shaped movable electrode that approaches and separates from and 9 is linearly displaced by an appropriate mechanism, and the operating axis of the movable electrode is led out to the outside of the main container.

For mounting equipment on the front side of the main container, a plate 111 is removed to airtightly close the hole 108, and the number of equipment is 4.
A track side new road switch DS2 is supported on the inner surface of the shingle plate 111. The disconnector DS2 consists of a movable contact unit 14 and a fixed contact unit 15 supported on an insulating support 13 shaped like a 7-shape. 14.15 are arranged with their central axes oriented vertically. The movable contact unit 14 consists of a rod-shaped contact driven to move in a straight line by an appropriate operating mechanism, arranged in a shield, and the fixed contact unit 15 shields the tulip contact that the movable contact approaches and separates. It consists of things placed inside. The movable contact of the disconnector DS2 of each phase is connected to the movable side terminal electrode 6 of the circuit breaker CB of the corresponding phase via a connecting conductor 17, and a through-type current transformer C is connected to each connecting conductor 17.
T is attached. The fixed contact unit 15 of each disconnector DS2 is provided with a fixed electrode 18 for an earthing device, and a grounding device ES is provided near the fixed electrode together with the fixed electrode 18.
A rotatable movable electrode 19 for a grounding device constituting part 3 is disposed. The movable electrode 19 is supported by a suitable means on the plate 111 for mounting the device. One end of a connecting conductor 20 is connected to the fixed contact unit 15 of each disconnector DS2, and the other end of the connecting conductor 20 is arranged near the cable head mounting hole 105 on the back side of the main container.

An instrument voltage transformer LPT is fixed to the bottom plate 102 of the main container 1, and the terminals of the transformer are connected to the middle of the connection conductor 20.

Operator boxes 21 and 2 are arranged vertically on the front side of the main container 1.
2 is arranged, and the upper operation box 21 is mounted on the board 11.
0 and 111, and the lower operation box 22 is supported by the plate 111, respectively. Upper control box 1
The operating devices for the circuit breaker CB and the grounding devices ES1 and ES2 are housed in the box 10, and the operating devices for the disconnecting switch DS2 and the grounding device ES3 are housed in the lower operating device box 111.

The operating device in each operating device box is connected to the operating shaft of the corresponding device via a link mechanism or the like.

The above-mentioned parts constitute a main unit consisting of equipment including a circuit breaker and a line-side disconnector disposed between the busbar-side disconnector and the cable head.

Attachment for the first and second busbars on the back side of the main container 1 [Pull hole 1
First and second busbar units 23 and 23 are attached to 03 and 104, respectively.

Each bus bar unit includes a first tubular portion 25a and a second tubular portion 25 provided perpendicularly to the first tubular portion 25a.
It is provided with a tubular container 25 formed in the shape of a cross tube consisting of b. Each tubular container 25 of the busbar units 23 and 24 has one end of its first tubular portion 25a aligned with the mounting holes 103 and 104 for the first and second busbars, and a second tubular portion 25b laterally. One end of the first tubular portion 25a is airtightly connected to the holes 103 and 104 by flange connection via an insulating spacer 26.

Three-phase conductors 27 are provided hermetically passing through the insulating spacer 26, and a fixed contact for a disconnector 28 is attached to the ends of these conductors located within the tubular container 25. Inside the second tubular portion 25b of the tubular container 25 of the first and second busbar units 23 and 24, there are first and second busbars B, respectively.
Three-phase bus conductors 30 constituting S1 and BS2 are arranged in parallel, and these bus conductors 30 are connected to the second tubular portion 25b.
It is supported by insulating spacers with mounting numbers so as to airtightly close both ends. First and second bus unit 23
A movable disconnector contact unit 31 facing the disconnector fixed contact 28 of the corresponding phase is disposed on the busbar conductor 30 of each phase of 24 and 24.

Each movable contactor unit 31 linearly displaces the fixed contactor 2
A rod-shaped contact 8 that connects and separates is arranged in the shield together with its drive mechanism, and the fixed contact 28 for disconnector of each phase of the first bus unit 23 and the movable contact unit 31
A first bus-side disconnector DS11 is constructed. Further, the fixed contact for disconnector of each phase of the second bus unit 24 and the movable contact unit 31 constitute a second bus-side disconnector DS12. A cover plate 32 is removed so as to airtightly close the opening on the back side of the first tubular portion 25a of each tubular container 25, and the first and second busbar units y
h A busbar side disconnector D is installed on the outer surface of the cover plate 32 of 23 and 24.
Operator boxes 33 and 34 are attached that house the operating devices for operating the SII and [) 312.

The operating devices in the operating device boxes 33 and 34 are the first tubular portions 25a.
It is connected to the operation shaft of the movable contactor 30 of the corresponding phase disconnector DS11 or DS12 by an appropriate mechanism such as a link provided by airtightly penetrating the side wall or cover plate 32 of the switch. In addition, 35 is a disconnector DS11 or DS12
This is a shield placed between the mechanism that connects the controller to the controller and each disconnect switch. The conductor 27 of each phase provided in the insulating spacer 26 of the first bus unit 23 is connected to the fixed side terminal electrode 5 of the circuit breaker CB of the corresponding phase via the connection conductor 36, and 24 insulating spacers 26
The conductor 27 is connected to the fixed side terminal electrode 5 of the circuit breaker CB of the corresponding phase through connection conductors 37 and 38.

A cable head unit 40 is arranged below the second busbar unit 25. The cable head unit 40 has a first tubular structure with its axis directed in the horizontal direction.
The container 41 is arranged with its axis facing the vertical direction, and a second container 42 in the shape of a hollow tube whose upper end is flanged to an opening 40a provided on the lower surface of the first container 41. One end of the first container 41 is airtightly connected to the cable head mounting hole 103 of the main container 1 through an insulating spacer 43 by flange connection. The lower end of the second container 42 is arranged to face the opening of a couple pit 45 provided underground, and a lid plate 46 is attached to airtightly close the lower end opening of the second container 42. A three-phase cable pend Cal is hermetically penetrated through the cover plate 46 and installed with each central axis oriented vertically, and each cable head C
Connected to H is a connector 47 attached to the terminal of the cable C that stands up in the cable pit. A three-phase conductor 48 is provided hermetically passing through the insulating spacer 44, and the connecting conductor 20 connected to the line-side disconnector DS2 is connected to the end of the conductor on the main container side. The end of each conductor 48 located in the cable head container is connected via a connecting conductor 50 to the cable head CH of the corresponding phase. A cover plate 5 attached to airtightly gate the rear opening of the first container 41 of the cable head container.
A three-phase lightning arrester LA is attached to the lightning arrester 1, and the non-ground terminal of each lightning arrester is connected to the connection conductor 50 of the corresponding phase.

Main container 1, each bus bar container 25 and cable head container 43
The interior is filled with an insulating gas such as SF6 at a low pressure of 2 Kg/crl or less.

A rectangular parallelepiped cover container 60 is attached to the front side of the main container 1, and the mechanism section 7 attached to the end of the circuit breaker CB, the operation box 21 and 22, etc. are attached to the front side of the main container 1. All the components are covered by a cover container 60. Doors 61 and 62 that can be opened and closed are provided on the front of the J: sea urchin cover container 60 shown in FIG. I'm starting to get it. Further, an opening for inspecting the circuit breaker is provided above the door 61, and the opening is closed by a removable lid 63. The cover container 60 is provided so as to cover substantially the entire front surface of the device, and is arranged so that when the device is viewed from the front side, the device gilt copper appears to have a rectangular parallelepiped shape.

The above parts constitute the gas insulated switchgear GIS,
When multiple gas insulated switchgears are installed in an electrical station, multiple gas insulated switchgears GI are installed as shown in Figure 1.
S are arranged side by side in the horizontal direction, and the busbar conductors of the first and second busbar units of adjacent GIS are connected to each other.

In this case, the busbar units are connected to each other by connecting the busbar containers of adjacent gas-insulated switchgear to each other via an insulated spacer that supports the R1 wire conductor, so the distance between adjacent gas-insulated switchgears is It can be made extremely small. Therefore, it is possible to configure a row of panels in which multiple gas-insulated switchgears are placed close to each other, which not only makes it possible to simplify the appearance and easily harmonize with the surrounding environment.
It can contribute to improving the efficiency of equipment inspection.

The apparatus of the above embodiment can be assembled, for example, in the order shown below. First, to install equipment on the front side of the main container 1, the instrument voltage transformer LPT is inserted into the main container through the hole 108 and fixedly covered. Next, install the equipment mounting plate 110 with the circuit breaker CB installed in the equipment mounting hole 107 (1), and install the equipment mounting plate 111 that supported the disconnector DS2 in the equipment mounting hole 108 (=I I ). Next, for installation on the back side of the main container 1, holes 103 to 105 are used as hand holes to connect the C circuit breaker and disconnector DS2, and to connect the current transformer CT.
[Place the disconnect switch DS2 and voltage transformer LP
Connect with T. After that, attach the pre-assembled second bus bar unit 24 to the back side of the main container 1 through the hole 104.
In the installation, the first bus unit 24 and the circuit breaker CB are connected using the hole 103 as a hand hole. Next, the first bus unit 1-23 is attached to the hole 103 of the main container 1, and after connecting the first bus unit and the circuit breaker CB through the opening at the upper end of the main container 1, the upper cover 101 is closed. Take it” Ruru. Next, attach the cable head unit 40 to the hole 105, and then attach each operating box and cover container 6.
Set 0 to the installation number to finish assembling the device.

With the above configuration, if an accident occurs within the main unit, the main unit can be separated from both bus units and pulled out forward without causing a power outage to the bus units 23 and 24. Able to perform inspection and repair. Furthermore, if a ground fault or the like occurs within the bus unit, the bus unit can be inspected and repaired by separating only the bus container 25 from the insulating spacer 26 without opening the main unit.

By the way, when an OF cable is used, the cable head is usually installed when the cable manufacturer processes the end of the cable, and at the assembly site of the gas insulator I3Il device, the assembly worker removes the cable head from the cable by the external dimensions. That is not allowed. In the configuration J of the above embodiment, the cable head container can be attached after the cable head CH is attached to the end of the cable.
As described above, even if the cable head attachment 1112 is not allowed, the device can be easily assembled. That is, when an OF cable or the like is used, the cover plate 46 is attached to the cable head in advance when the cable is terminal-treated and the cable head CH is attached, and the cable head container 43 is attached to the main container. The cover plate 46 to which the cable head is attached is positioned at the frontage of the cable pit 45 before the cable head is installed. Thereafter, the second container 42 constituting the cable head container 43 is connected to the lid plate 46, and then the first container 41 is connected to the second container 42, and the main container 1 is connected to the hole 105.

Next, FIGS. 4 and 5 show another embodiment of the present invention. In this embodiment, a disconnector DS is installed on the front side of the main container 1.
The circuit breaker CB is supported by the upper cover 101 and inserted into the main container 1 from the upwardly inclined opening thereof. The busbar units 23 and 24 are constructed in the same manner as in the embodiment shown in FIGS. 1 and 2, and are attached to the main container 1 using the same construction as in the embodiment.

In this embodiment, the movable terminal electrode 6 provided on the side surface of the container 4 of the circuit breaker CB is connected to the first bus unit 23 via the connecting conductor 70, and the fixed terminal electrode 5 of the circuit breaker is connected to the connecting conductor 70. It is connected to the second bus units l-24 via 71. Note that 72 is a link that connects the operating shafts of the disconnectors DS11 and DS12, which are led out to the outside by penetrating the side wall of the first tubular portion 25a of the bus bar container, to the operating devices in the operating device boxes 33 and 34. .

The cable head container 40 consists of a single tubular container, and in this embodiment, a cable head CH is attached to the outside of a lid plate 51 that taps the end of the container 40. A conductor 7 that connects the corresponding phase disconnector, DS2, and the potential transformer LPT via a connecting conductor 73
4, and a current transformer CT is attached to each connecting conductor 73.

Operator boxes 21 and 22 are housed in the front of the main container 1. The operator box 21 houses the operator for the circuit breaker CB, and the operator box 22 houses the operators for the disconnector DS2 and the grounding device ES3. The utensils are stored. In this embodiment, the 'a disconnection grounding devices @Es1 and ES2 are omitted.

A cover container 60 is further attached to the front side of the main container 1, and a door 61' used for inspecting the instruments in the operator box 21 and the operator box 22 is provided on the front surface of the cover container 60.
and 62' are installed.

In the embodiments described above, the basic shapes of the main container, bus bar container, and wobble head container are cylindrical, but containers of other shapes such as a rectangular parallelepiped or a cube can also be used.

In the above embodiment, a gas insulated switchgear having a double busbar configuration was taken as an example, but the present invention can be similarly applied to a gas insulated switchgear having a single busbar configuration.

In the case of a single busbar configuration, the busbar unit is installed in one of the first and second busbar openings.

Effects of the Invention As described above, the device of the present invention is composed of a main unit, a bus unit, and a cable head unit, so it is only necessary to assemble each unit individually and connect them to each other later. Easy to assemble. In addition, since the busbar unit and the main unit are separated by gas, in the event of an accident with the busbar unit, the busbar unit can be separated from the main container and repaired without affecting the main unit. When an accident occurs, the main unit can be repaired without disconnecting the main unit from the bus unit and causing a power outage to the bus. In addition, since we have provided holes for the first and second busbars (i.e. holes for the cable head and holes for the cable head) on the side surface of the main container, it is possible to construct an open/close circuit with a double busbar configuration. By using one of the 1 and 2 busbar holes] (), a switching circuit with a single busbar configuration can be configured.In this case, in either configuration, the main unit, busbar unit 1-, and cable head Since it is sufficient to have a common configuration, there is an advantage that it becomes easy to standardize each container and the m devices arranged in each container.

[Brief explanation of the drawing]

FIG. 1 is a front view showing the configuration of an embodiment in which the present invention is applied to a switchgear with a double busbar configuration, and FIG.
3 is a single line diagram showing the electrical configuration of each phase of the same embodiment, FIG. 4 is a front view showing another embodiment of the present invention, and FIG. 5 is the same as that of FIG. 4. It is a v-vswi plane view. 1... Main container, 103... First busbar installation hole,
104...Second busbar mounting hole, 105...Cable head mounting hole, 23...First busbar unit, 24...Second busbar unit, 25...Busbar container , 26... Insulating spacer, 40... Cable head unit, 43... Cable head container, CB...
Circuit breaker, DSll, DS12...Bus bar side disconnector, D
S2...Line side disconnector, CH...Cable head,
ES1 to ES3...Grounding device, CT...Current transformer, L
PT...Instrument voltage transformer, LA...Lightning arrester. Nawate ■ - Figure 2 Figure 3 V'' Procedural amendment (self-imposed March 27, 1980 Director-General of the Patent Office Kazuo Wakasugi 1, Indication of the case Patent Application No. 1981-144 2, Title of the invention Gas insulation Opening/closing device 3, relationship with the case of the person making the amendment Patent applicant (394) Nissin Electric Co., Ltd. 4, agent 6th floor of Bunzan Building, 4-31-6 Shinbashi, Minato-ku, Tokyo Specification 6, contents and procedures of amendment City official letter (spontaneous) October 1, 1980 Manabu Shiga, Commissioner of the Patent Office 1, Indication of case: Japanese Patent Application No. 1981-199144 2, Title of invention: gas insulated switchgear 3, Amendment with the person making the amendment Related Patent Applicant (394) Nissin Electric Co., Ltd. 4, Agent 1, 6th Floor, Bunzan Building, 4-31-6 Shinbashi, Minato-ku, Tokyo
"Claims" and "Detailed Description of the Invention" column 6, contents of amendment (2) page 5, lines 11 to 16 [the circuit breaker...
has been done. ] Delete. (3) In page 18, line 13, "Front side" is corrected to "Front side". (4) On page 19, line 6, "gold and bronze" was corrected to "whole". (5) Correct "1st" to "2nd" on page 20, line 17. (6) On page 23, line 15, "with disconnector" is corrected to "disconnector". Above 2, the claims include at least one set of busbars, a cable head connected to a cable pulled out from the busbar, a busbar-side disconnector, a track-side disconnector, and a cable connected to the busbar via the busbar-side disconnector. In the Cas insulated switchgear, the circuit breaker is connected to the cable head via the line-side disconnector, and the circuit breaker and A main unit configured by housing a disconnector, a busbar unit configured by housing the set of busbars together with the busbar side disconnector in a busbar container, and a cable head configured by attaching the cable head to the cable head container. units, and holes for first and second busbar attachments and holes for cable head attachment are provided vertically on the side surface of the main container, and the busbar units 1 to 1 are provided with holes for the first and second busbar attachments, and The cable head unit is connected to one of the busbar entry holes of No. 2 in a gas-separated state with respect to the inside of the main container, and the cable head unit is connected to the cable head mounting hole. Patented edge opening/closing device.

Claims (1)

[Claims] at least one set of busbars, a cable head connected to a cable pulled out from the busbar, a busbar-side disconnector and a track-side disconnector, and a cable head connected to the busbar via the busbar-side disconnector and connected to the cable head. In a gas-insulated switchgear equipped with a circuit breaker connected via a side disconnector, the circuit breaker and the disconnector are housed in a vertically long main container arranged with the longitudinal direction facing the vertical direction. comprising a main unit, a busbar unit configured by storing the set of busbars together with the busbar side disconnector in a busbar container, and a cable head unit configured by attaching the cable head to the cable head container, First and second busbar mounting holes and cable head mounting holes are provided vertically on the side surface of the main container, and the busbar unit is provided with holes for the first and second busbar mounting holes. The cable head unit is connected to the main container in a gas-separated state, the cable head mounting is connected to the hole, and the circuit breaker and track side disconnect switch operating devices are connected to the main container in a gas-separated state. The busbar mounting of the container is housed in a hole, and the cable head mounting is housed in a main container-side operating device storage box supported against the surface opposite to the surface provided with the hole, and the busbar-side disconnector is A gas insulated switchgear characterized in that an operating device is housed in a busbar container-side operating device box supported with respect to the busbar container.