JPS6237379Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a gas insulated switchgear installed in a substation or the like.

Recently, in gas-insulated switchgear installed in substations, etc., multiple devices such as disconnectors, disconnectors, and grounding devices that are not necessary for the configuration of the switchgear on the primary side of the transformer are insulated with SF ₆ etc. It has been proposed to store them all at once in an outer shell container filled with gas. With this configuration, the structure is simpler and more compact than conventional gas-insulated switchgear, in which each device is housed in an individual tubular metal container and the metal containers are connected to each other via an insulating spacer. However, in order to reduce production costs and further improve economic efficiency, it is necessary to standardize each part, including the outer shell, and to create various skeletons (for each phase). (single-line diagram showing the electrical configuration).

The purpose of this invention is to package multiple devices, such as shield switches, disconnectors, and grounding devices that make up the switchgear installed on the primary side of a transformer, into an outer shell container filled with insulating gas. The objective is to standardize each part of the housed gas-insulated switchgear, including the outer shell container, so that it can be adapted to various skeletons.

Therefore, in the present invention, the busbar conductor electrically connected to the part of the switchgear housed in the outer shell container that is connected to the external equipment is arranged at approximately right angles to the pair of opposing side walls of the outer shell container. Place it in A through hole is provided at a position corresponding to the bus conductor of the pair of side walls, through which a member connected to the bus conductor passes through in order to connect the bus conductor to an external device, and the peripheral outer surface of the through hole is provided. Place the connecting flange on the

Further, an adapter container is connected to a connecting flange of an opening provided in at least one of the pair of side walls of the outer shell container. The adapter container has an opening with flanges in three directions, and the flange of the opening in one direction is connected to a connecting flange on one of the pair of side walls. This adapter container accommodates a portion of the member connected to the bus conductor located outside the outer shell container.

As described above, the bus conductor is arranged approximately at right angles to the pair of side walls of the outer shell container, and a connecting flange is provided on the outer surface of the peripheral part of the through hole formed in both side walls, and this connecting flange has openings on three sides. By connecting an adapter container, it is possible to connect another outer shell container or branch a circuit through the adapter container, so that it is possible to correspond to various skeletons. Therefore, it is possible to configure switchgears for various substation equipment with different numbers of power receiving lines and transformer banks using units of the same structure, and it is possible to standardize each part including the outer shell, which is economical. can be improved.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The gas insulated switchgear of the present invention will be explained in detail below with reference to the illustrated embodiments.

Figure 1 is a single line diagram showing an example of the configuration of gas insulated switchgear unit I placed on the primary side of transformer bank Tr _1. This gas insulated switchgear unit includes lightning arrester LA and voltage detection device A set of switchgear consisting of VD, grounding devices ESW ₁ to ESW ₅ , disconnectors DS ₁ to DS ₄ , cable disconnector CB, and bus conductor BUS is connected to an outer shell container filled with SF ₆ gas. The opening/closing device inside the outer shell is a cable head Chd ₁ and a gas oil compartment bushing BS.
1L incoming cable for each power receiving line via
and connected to transformer bank Tr ₁ . The bus conductor BUS of the switchgear in the outer shell is connected to a cable head Chd ₂ , to which the delivery cable l ₁ is connected.

Figures 2 to 4 show an embodiment of the present invention embodying the configuration shown in Figure 1. In the figure, 1 is filled with SF ₆ gas at about atmospheric pressure. The outer shell container 2 has an airtight structure, and 2 is the outer shell container 1.
The outer shell container 1 is formed to have a substantially rectangular parallelepiped shape as a whole and is installed on a concrete base 3. The lower half of one side wall 1a of the outer shell container 1 is bent into a substantially step-like shape so that protrusions 101 and 102 each having a dogleg-shaped cross section extending in the horizontal direction (perpendicular to the paper plane of FIG. 2) are arranged vertically. and the protrusions 101 and 102
End walls 103 and 104 inclined toward the base 3 of the
Three mounting holes 105 and 106 are provided in each side in a direction perpendicular to the plane of FIG. 2. In the illustrated example, the lightning arrester LA is inserted into the outer shell container through the attachment hole 105, and the flange 4 fixed to the end of the lightning arrester LA is hermetically connected to the periphery of the attachment hole 105. A cable head Chd ₁ is inserted into the outer shell 1 through the attachment hole 106, and the flange 5 attached to the end of the cable head is hermetically connected to the periphery of the attachment hole 106. A connector 6 attached to an end of a cable 1L rising from a cable pit 3a formed by digging into the base 3 is detachably connected to the cable head _Chd1 . Outer shell container 1
Three mounting holes 60 for mounting bushings are formed in the upper part of the side wall 1b opposite to the side wall 1a in a row in a direction perpendicular to the plane of the paper of FIG. The flange portions 7 are connected airtightly and liquidtightly. A branch pipe 8 having a rectangular cross section is joined to the outer surface of the side wall 1b so as to surround the three mounting holes 60, and the branch pipe is filled with insulating oil. Each bushing BS is connected to a transformer Tr ₁ (not shown) via a connecting conductor 9 disposed within the branch pipe 8. An operation box 10 is attached to a portion of the side wall 1b of the outer shell container 1 below the branch pipe 8, which houses the actuators for the shield, disconnector, disconnector, and grounding device, as well as instruments for monitoring gas pressure, etc. There is.

The breaker CB is an airtight container 1 filled with SF ₆ gas.
This is a gas shield and disconnector in which a fixed contact and a movable contact are housed together with an arc extinguishing mechanism in a container 11. One end of the container 11 is supported by the lower part of the side wall 1b of the outer shell container, and the other end is supported by an insulating support member 12. It is supported by the bottom wall 1c of the outer shell container. The operating rod for the shield breaker CB is on the side wall 1.
b in an airtight manner and is connected to an operating device in the operating box 10. The disconnectors DS ₁ to _{DS 4} consist of a movable contact 15 supported by a shield 13 and operated by an operating shaft ₁₄ and a fixed contact placed within the shield 16 _. 1
3 are respectively connected to the fixed contact and the movable contact of the shield breaker CB. In addition, the shield 16 that holds the fixed contact of the disconnector DS ₂ is connected to the insulating support member 1
The shield 16 of the disconnector DS ₁ is mechanically engaged with the shield 16 of the disconnector DS ₂ through insulating support members 12 , 12 . The base of a bifurcated connecting conductor 17 is connected to the shield 16 of the disconnector DS ₁ , and the conductor connecting portion 1 provided at the end of one branch 17a of the connecting conductor 17 is connected to the shield 16 of the disconnector DS 1.
8 is connected to the electrode 19 of the lightning arrester LA. The other branch portion 17b of the connecting conductor 17 is bent into a U-shape so as to extend downward inside the outer shell container, and the lower end of this branch portion 17b is connected to the insulating support member 12.
It is supported by the bottom wall 1c of the outer shell container via.
A conductor connection 20 is provided at a position corresponding to the cable head Chd ₁ of the branch 17b, and the conductor 21 of the cable head Chd ₁ is connected to this conductor connection 20.

Further, the shield 13 of the disconnector DS ₃ is connected to the shield 16 of the disconnector DS ₂ via a conductor 22, and the shield 16 of the disconnector DS ₃ is located within the outer shell container of the center conductor of the gas-oil classification bushing BS. connected to the end. The shield 13 of the disconnector DS ₄ is connected to the shield 13 of the disconnector DS ₃ , and the disconnector
The shield 16 of the DS ₄ is supported by a support member 23 via an insulating support member 12. The support member 23 extends inside the outer shell container in a direction perpendicular to the paper plane of FIG.
is supported by

The grounding devices _ESW1 to _ESW4 are comprised of a fixed electrode 24 connected to a grounded point and a rotatable movable electrode 26 supported at one end by a bracket 25. In more detail, the earthing device ESW ₁ ,
The fixed electrodes 24 of ESW ₂ and ESW ₃ are respectively connected to the lower end of the branch part 17b of the connection conductor 17, and to the bottom of the breaker CB.
The movable contact 26 is connected to the fixed contact of the bracket 2 and the movable contact of the shield breaker CB.
5 is supported on the bottom wall 1a of the outer shell container 1. In addition, the fixed electrode 24 of the earthing device ESW ₄ is a disconnector.
The movable electrode 26 is provided on the shield 16 of the DS ₃ , and the movable electrode 26 is connected to the ceiling wall 1f of the outer shell container 1 via the bracket 25.
is supported by Note that FIG. 2 only shows the equipment for one phase among the equipment stored in the outer shell container 1, and the equipment for three phases in the outer shell container 1 is arranged in the same way as shown in the paper of FIG. They are arranged side by side at right angles.

In the upper space inside the outer shell container 1, there are three busbar conductors extending in a direction perpendicular to a pair of side walls 1d and 1e that face each other in a direction perpendicular to the paper plane of FIG.
BUS is arranged in parallel. 3 bus conductors
The BUS is supported on the ceiling wall 1f of the outer shell via an insulating support member 12, and is connected via a connecting conductor 27 to the shield 16 of the disconnector DS ₄ of the corresponding phase. Both ends of each bus conductor BUS are side walls 1d and 1
The bus bar conductor ends at a position separated by a predetermined distance from the bus bar conductor e, and conductor connecting portions 28 for connecting other conductors are provided at both ends of each bus bar conductor. Rectangular through holes 107 are provided in the side walls 1d and 1e of the outer shell container 1 at positions corresponding to the bus conductors BUS, and rectangular connecting flanges 29 are attached to the outer surface of the periphery of each through hole. Each connection flange 2
Reference numeral 9 is formed to connect a rectangular plate-shaped lid member (blind lid) 30 that airtightly closes the mounting hole 107 or a connecting flange 32 of the adapter container 2, and in the illustrated example, it is provided on the side wall 1d side. Connecting flange 32 of adapter container 2 to connecting flange 29
However, the connection flange 2 provided on the side wall 1e side
A lid member 30 is connected to each of the terminals 9. The adapter container 2 consists of a rectangular parallelepiped main body and three branch pipes 35 projecting downward from the bottom of the main body.
More specifically, openings with a shape corresponding to the through hole 107 of the outer shell container are provided at both ends of the rectangular parallelepiped main body of the adapter container, and connection flanges 32 are provided at the peripheries of the openings at both ends. and 3
3 is provided. Bottom wall 2a of adapter container 2
Three holes 34 are provided at the same intervals as the intervals between the bus conductors BUS, and the upper end of a branch pipe 35 is joined to the peripheral edge of each hole 34. A connecting flange 36 is provided at the lower end of each branch pipe 35, and this connecting flange 3
The cable head is attached to the flange plate 37 joined to 6.
Chd ₂ is installed. A connecting conductor 28 is connected to the conductor connecting portion 38 at the end of the bus conductor BUS on the side wall 1d side.
Each connecting conductor 38 is inserted into the adapter container 2 through a through hole 107 provided in the side wall 1d and connected to a conductor 39 of the cable head Chd ₂ within the adapter container. A connector 40 attached to the terminal end of the cable _l1 is detachably connected to the cable head _Chd2 , and the cable _l1 is connected to a busbar of another switchgear unit or other external equipment (not shown). Each bus conductor
A conductor 4 is connected to the conductor connection portion 28 on the side wall 1e side of the BUS.
1 is connected, and the tip 41a of this conductor 41 is rounded to alleviate the electric field. A rectangular plate-shaped lid member 30 is attached to the connection flange 33 of the adapter container 2.
The opening on the flange 33 side of the adapter container 2 is hermetically closed. Although not shown in FIGS. 2 to 4, the grounding device ESW ₅ for grounding the bus conductor BUS is also constructed in exactly the same manner as the grounding devices ESW ₁ to ESW ₄ . Also voltage detection device VD
is constructed by arranging a detection electrode (not shown) close to the base of the connection conductor 17 shown in FIG. 2, for example.

As described above, the bus conductor BUS is arranged in a direction perpendicular to the pair of opposing side walls 1d and 1e of the outer shell container 1, and the through holes 107 and connection flanges are formed at positions corresponding to the bus conductors of the side walls 1d and 1e. 29, and by connecting an adapter container opening in three directions to the connecting flange, it is possible to configure the switchgear using the same unit even when the number of power receiving lines and the number of transformer banks increases. Moreover, when two or more units are combined, the arrangement of the units can be changed as appropriate according to the requirements of the substation.

Hereinafter, various examples of arrangement of units for configuring a switchgear for a two-line power receiving, three-transformer bank substation equipment shown in FIG. 5 will be described with reference to FIGS. 6 to 9.

In FIG. 5, the first gas insulated switchgear unit has the same configuration as that shown in FIG. 1 except for the cable head Chd ₂ , and the first gas insulated switchgear unit is
A second gas insulated switchgear unit constructed in exactly the same way as the gas insulated switchgear unit 1L and 2L are the cables of the first and second power receiving lines, respectively. The bus conductors BUS of the first and second units are interconnected, and a gas insulated potential transformer GPT is connected to these bus conductors. Bus conductors of first and second units
The BUS is connected via the disconnector DS ₃ and the bushing BS to the first
and connected to the primary side of the second transformer bank Tr ₁ and Tr ₂ and to the primary side of the third transformer bank Tr ₃ via a disconnector DS ₅ , a cable head Chd ₂ and a cable L ₂ It is connected to the. Also a disconnector
A grounding device ESW ₆ is provided near the DS ₅ , and the disconnector DS ₅ , the grounding device ESW ₆ , and the cable head Chd ₂ are housed in a separate container from the outer shell containers of the first and second units. has been done.

FIG. 6 shows a first example of the arrangement of units when configuring the switchgear shown in FIG. 5, in which the first and second gas insulated switchgear units and the second It is constructed in exactly the same way as the unit shown in FIGS. The outer shell containers 1 of the first and second units are placed on the base 3 such that the side wall 1d of the outer shell container of the first unit and the side wall 1e of the outer shell container of the second unit face each other. A connecting flange 32 of the first adapter container 2A is connected to a connecting flange 29 installed side by side and attached to the side wall 1d of the outer shell container of the first unit. The first adapter container 2A is constructed in the same manner as the adapter container 2 shown in FIGS. 3 and 4, except that a hand hole is provided in the upper wall of the first adapter container 2A and the hand hole is closed by a lid 42. ing. Adapter container 2A
A flange 43 provided on the container of the gas insulated potential transformer GPT is connected to the flange 36 of the branch pipe 35 attached to the bottom wall of the gas insulated potential transformer GPT. There is an insulating spacer 4 between the branch pipe 35 and the inside of the instrument transformer GPT container.
4, and the container of the instrument transformer GPT is filled with SF ₆ gas at a higher pressure than the inside of the outer shell container 1. Bus conductor of first unit
The connection conductor 4 is connected to the conductor connection part on the side wall 1d of the BUS.
5 is connected, and this connecting conductor 45 is connected to a primary side terminal conductor 46 of an instrument transformer rising up through an insulating spacer 44 within the adapter container 2A. Note that 47 is a pedestal for supporting the potential transformer GPT on the base 3. One end of an expansion joint 49 is connected to the connection flange 33 of the adapter container 2A via a bushing mounting plate 48, and the center conductor of a bushing 50 provided integrally with the bushing mounting plate 48 is connected to the end of the connection conductor 45. has been done. On the other hand, a connecting flange 29 provided on the side wall 1e of the second unit has a first adapter container 2 attached thereto.
One connecting flange 32 of a second adapter container 2B configured similarly to A is connected, and the other connecting flange 33 of this second adapter container is connected to the other end of the expansion joint 49. One end of the connection conductor 51 is connected to the conductor connection portion on the side wall 1e side of the bus conductor BUS of the second unit, and the connection conductor 51
The other end is connected to the expansion joint 49 through the adapter container 2B.
It is connected to the center conductor of the bushing 50 that protrudes inward. The connecting conductor 51 has three parts 51a to 51a.
51c, and the divided portions can be separated at points a and b through hand holes. A flange 36 of a branch pipe 35 connected to the bottom wall of the second adapter container 2B has a tubular container 5
A flange 53 supporting the cable head Chd ₂ is connected to the flange at the lower end of the tubular container 52. Tubular container 5
A disconnecting switch DS ₅ and a grounding device ESW ₆ are housed in the cable head Chd 2, and the cable head Chd ₂ is connected via the disconnecting switch DS ₅ and a connecting conductor 54 to a connecting conductor 51 connected to a bus conductor BUS. cable head
A connector 54 attached to one end of the cable l ₂ is detachably connected to Chd ₂ , and the other end of the cable l ₂ is connected to a primary terminal of a transformer bank Tr ₃ (not shown). Although not shown in Figure 6, the first
The second unit and the transformer bank Tr 1 are connected to the transformer bank Tr 1 through a gas-oil partition bushing BS provided at the top of the side wall 1 b located on the back side of the paper surface of the outer shell container _{1 .}
and Tr ₂ , respectively.

In the embodiment shown in FIG. 6, the first unit and the second unit are connected to the first adapter container 2.
The gas is separated by a bushing mounting plate 48 disposed between A and the expansion joint 49. When the first unit fails, the connecting conductor 51 is disconnected at point b, allowing only the second unit to operate and the transformer banks Tr ₂ and Tr ₃ to operate. Furthermore, when the second unit fails, the connecting conductor 51 is disconnected at point a, so that only the first unit can be operated and the transformer banks _Tr1 and _Tr3 can be operated.

In the above embodiment, the first adapter container 2A
and the outer shell container 1 of the first unit and the second unit.
Gas may be separated between the adapter container 2B of the second unit and the outer shell container 1 of the second unit by insulating spacers. Alternatively, the first adapter container 2A and the container of the potential transformer GPT may be communicated without gas separation. In order to make the instrument transformer compact, as in the above embodiment, the adapter container 2A and the instrument transformer GPT are used.
The gas is divided between the container and the instrument transformer GPT.
It is preferable to fill the container with high pressure insulating gas.

Figures 7 and 8 show a second embodiment in which the configuration shown in the single line diagram in Figure 5 is realized using the first and second units. The first and second units are arranged closer together than in the example shown in FIG. One end of the expansion joint 49 is connected thereto, and the other end of the expansion joint 49 is connected to the connection flange 29 on the side wall 1e side of the outer shell container 1 of the second unit.
A bushing 50 is integrally provided on the bushing mounting plate 48, and one end of the center conductor of this bushing 50 is connected to the bus conductor in the outer shell container of the first unit.
Connected to BUS. The connecting flange 29 on the side wall 1e side of the outer shell container of the first unit has a first
The connecting flange 32 of the first adapter container 2A is connected to the lower end flange of the branch pipe 35 provided at the bottom of the first adapter container 2A.
The connecting flange of the GPT container is connected.
Bus conductor in the outer shell container 1 of the first unit
The connection conductor 5 is connected to the conductor connection part on the side wall 1e of the BUS.
5 is connected, and the other end of this connecting conductor 55 is connected to the potential transformer GPT within the first adapter container 2A.
is connected to the terminal conductor 46 of. Further, the connection flange 32 of the second adapter container 2B is connected to the connection flange 29 on the side wall 1d side of the outer shell container of the second unit in a gas-divided manner by a bushing mounting plate 48, and is provided integrally with the bushing mounting plate 48. One end of the center conductor of the bushing 50 is connected to the bus conductor.
It is connected to the conductor connection portion at the end of the BUS on the side wall 1d side. The flange 36 of the branch pipe 35 of the second adapter container 2B accommodates a disconnector DS ₅ and a grounding device ESW ₆ , as in the example shown in FIG.
A tubular container 52 with attached Chd ₂ is connected to the second adapter container 2B of the center conductor of the bushing 50.
The side end is connected to the cable head Chd ₂ via a connecting conductor 54 and a disconnector DS ₅ . Lid members 30 are attached to the connection flanges 33 of the first and second adapter containers 2A and 2B, respectively. Cable head Chd ₂ as shown in Figure 8
Cable l ₂ connected to 1 of transformer bank Tr ₃
Connected to the next side. In FIG. 8, 56 connects the branch pipe 8 attached to the upper part of the side wall 1b of the outer shell containers of the first and second units to the branch pipe 57 connected to the containers of transformer banks Tr ₁ and Tr ₂ . The first and second units are connected to transformer banks Tr 1 and Tr ₂ by connecting conductors extending inside branch pipe 8, expansion joint 56 and branch pipe _57.
connected to the primary side of the

In the embodiment shown in FIGS. 7 and 8, the second
If the second unit fails, the second adapter container 2B can be connected to the connecting flange 33 of the first adapter container 2A, as shown by the chain line in FIG. 7, and the first unit can be operated only.

Next, Figure 9 shows the first unit and transformer bank.
In this case, the transformer bank Tr ₁ and the second unit and the transformer bank Tr ₂ are installed at separate locations, and in this embodiment, the instrument transformer is connected to the connection flange 29 on the side wall 1e side of the outer shell container of the first unit. device GPT
The first adapter container 2A is connected to the first adapter container 2A, and the branch pipe 52 housing the disconnector DS ₅ and having the cable head Chd ₂ attached is connected to the connection flange 29 on the side wall 1e side of the outer shell container of the second unit. The second adapter container 2B, which has been removed, is connected. Further, the connection flange 33 of the first adapter container 2A and the connection flange 33 of the second adapter container 2B have third and fourth adapter containers 2C and 2D, respectively.
A connecting flange 32 is connected thereto, and a lid member 30 is attached to the connecting flange 33 of the third and fourth adapter containers 2C and 2D, respectively. Third
The branch pipes 35 protruding from the bottom of the fourth adapter containers 2C and 2D each have a cable head.
Chd ₃ and Chd ₄ are installed, and these cable heads Chd ₃ and Chd ₄ are connected via connecting conductors to the first and second units and to the internal bus conductor BUS. The cable head Chd ₃ of the first unit is also connected to the cable head _{Chd 4 of} the second unit via a cable l3.

In the embodiment shown in FIG. 9, the third adapter container 2C and the fourth adapter container 2D can be connected to the connecting flange 29 on the side wall 1d side of the outer shell containers of the first and second units, respectively. Furthermore, the position of the adapter container may be changed as appropriate depending on the situation of the installation location.

In each of the above embodiments, the potential transformer GPT
Although the container of the potential transformer GPT is connected to the outer shell container via the first adapter container 2A, the container of the potential transformer GPT may be directly connected to the connecting flange 29 of the outer shell container 1.

In the above embodiment, the first to fourth adapter containers can all have the same shape,
This adapter container can also be standardized. The same applies to the instrument transformer GPT and the tubular container 52.

Furthermore, the positions of the cable head Chd ₁ and the lightning arrester LA can be swapped in the first and second units, and if the lightning arrester LA is not required, the lightning arrester LA can be replaced.
A cable head can also be installed instead.

In the above embodiment, the first and second gas insulated switchgear units are constructed in exactly the same way, but the types and arrangement of the equipment arranged in the outer shells of both units may be different. However, it is preferable to standardize all devices such as disconnectors, disconnectors, and connecting conductors disposed within the outer shell of each unit.

In the above embodiment, each device is supported on the side wall and bottom wall of the outer shell container, but a frame may be assembled inside the outer shell container and each device may be supported on this frame.

In the configuration shown in FIG. 2, it goes without saying that the operating shafts of each disconnector and grounding device are connected to the operating device in the operating box 10.

As described above, according to the present invention, it is possible to configure switchgear for various substation equipment with different numbers of power receiving lines and transformer banks using units with the same structure, and it is possible to configure switchgears for various substation equipment with different numbers of power receiving lines and transformer banks. Since it is possible to standardize each part including the outer shell container,
This has the advantage of improving economic efficiency. Furthermore, since the appearance of the switchgear can be unified, the appearance of the substation equipment can be made beautiful and harmonized with the surrounding environment.

[Brief explanation of the drawing]

Fig. 1 is a single line diagram showing the configuration of an embodiment of the present invention, Fig. 2 is a longitudinal sectional view of the embodiment embodying the configuration of Fig. 1, and Fig. 3 is a view taken in the direction of arrow A in Fig. 2. , 4th
The figure is a right side view of the main part of Figure 3, and Figure 5 is a single line showing the electrical configuration when two devices of the present invention are used to configure a switchgear for substation equipment with two circuits and three transformer banks. 6 is a front view showing a first embodiment embodying the configuration of FIG. 5, and FIGS. 7 and 8 are wiring diagrams.
The figures are a front view and a plan view showing a second embodiment embodying the configuration of FIG. 5, respectively, and FIG. 9 is a front view showing a third embodiment embodying the configuration of FIG. 5. . 1... Outer shell container, 2, 2A to 2D... Adapter container, 29, 32, 33... Connection flange, 30
...lid member, ...first gas insulated switchgear unit, ...second gas insulated switchgear unit,
Chd ₁ ~ Chd ₄ ... Cable head, DS ₁ ~ _{DS 5} ...
Disconnector, ESW ₁ to ESW ₆ ...Grounding device, CB...Shipping disconnector, BUS...Bus bar conductor.

Claims (1)

[Scope of Claim for Utility Model Registration] A plurality of devices such as a shield switch, a disconnector, and a grounding device constituting a switchgear provided on the primary side of a transformer are placed together in an outer shell container filled with insulating gas. In the gas-insulated switchgear housed in a gas-insulated switchgear, a bus conductor electrically connected to a portion of the switchgear connected to an external device in the outer shell container is connected to a pair of opposing side walls of the outer shell container. A through hole is provided at a position corresponding to the bus conductor of the pair of side walls, arranged substantially at right angles, through which a member connected to the bus conductor can pass through in order to connect the bus conductor to an external device. A connection flange is disposed on the outer surface of the periphery of the through hole, and the connection flange of the opening provided in at least one of the pair of side walls of the outer shell container has an opening with flanges in three directions. A gas insulated switchgear, characterized in that one flange of the above is connected to the adapter container, and a portion of a member connected to the bus conductor located outside the outer shell container is housed in the adapter container.