JP4738123B2 - Gas insulated switchgear - Google Patents

Description

  This invention includes a circuit breaker and a disconnecting device built in a gas insulated sealed container and receiving power from a power system, and a circuit breaker and a disconnecting device built in a gas insulated sealed container, and a transaction instrument transformer VCT and bus The present invention relates to a gas-insulated switchgear having a power feeding unit that feeds power received by the power receiving unit to the load side via the.

  An example of this type of conventional gas-insulated switchgear is, for example, Japanese Patent Application Laid-Open No. 2004-153904 (Patent Document 1). However, the disconnector is assembled in an insulating cylinder common to CB by a blade type method, and is complicated. It has become a structure. In addition, the bus is built in a dedicated space on the back side.

JP-A-5-30618 (FIG. 1 and its description)

  As described above, the conventional gas-insulated switchgear described in Patent Document 1 is insulated because the disconnector is assembled in a common insulating cylinder with the CB in a blade-type manner. Requires a large amount of space for securing the bus, and the busbar is built in the dedicated space on the back side, requiring a lot of space, resulting in a large size. In addition, it is difficult to change the connection of the built-in device to the bus because the bus is in the dedicated space on the back side. Therefore, it is necessary to reduce the size without making it difficult to connect the internal device to the bus.

  The present invention has been made in view of the above circumstances, and an object thereof is to reduce the size of a gas-insulated switchgear.

The gas insulated switchgear according to the present invention is
Built-in circuit breaker and disconnector in gas insulated sealed container, power receiving unit for receiving power from power system, VCT unit incorporating transaction instrument transformer VCT, and circuit breaker and disconnector in gas insulated sealed container A power feeding unit that feeds the power received by the power receiving unit to the load side through the transaction instrument transformer VCT, the first bus and the second bus;
The buses of the respective phases of the first bus and the buses of the respective phases of the second bus are arranged in parallel in the depth direction in the respective built-in units,
Both of the circuit breaker in the power receiving unit and the circuit breaker in the power supply unit are circuit breakers in which the mover moves linearly when opening and closing,
Both of the disconnector in the power receiving unit and the disconnector in the power supply unit are disconnectors that move linearly when the mover is opened and closed,
Each of the circuit breaker in the power reception unit, the circuit breaker in the power supply unit, the disconnector in the power reception unit, and the disconnector in the power supply unit is a unit in which the moving direction of the mover is incorporated. It is arranged to be in the depth direction,
Each of the circuit breaker in the power receiving unit, the circuit breaker in the power feeding unit, the disconnector in the power receiving unit, and the disconnector in the power feeding unit has an arrangement relationship with the bus in each unit incorporated therein. It is supposed to be arranged vertically
A gas insulated switchgear,
In the power receiving unit, a bus-side disconnector is disposed immediately below the first busbar, the circuit breaker is disposed directly below the busbar-side disconnector, and a power-receiving side disconnector is disposed directly below the circuit breaker,
The bus-side disconnector is located immediately below the bus in the center phase of the first bus so that the center of the movable-side terminal of the bus-side disconnector and the fixed-side terminal of the bus-side disconnector is located. It is what is arranged .

This invention
Built-in circuit breaker and disconnector in gas insulated sealed container, power receiving unit for receiving power from power system, VCT unit incorporating transaction instrument transformer VCT, and circuit breaker and disconnector in gas insulated sealed container A power feeding unit that feeds the power received by the power receiving unit to the load side through the transaction instrument transformer VCT, the first bus and the second bus;
The buses of the respective phases of the first bus and the buses of the respective phases of the second bus are arranged in parallel in the depth direction in the respective built-in units,
Both of the circuit breaker in the power receiving unit and the circuit breaker in the power supply unit are circuit breakers in which the mover moves linearly when opening and closing,
Both of the disconnector in the power receiving unit and the disconnector in the power supply unit are disconnectors that move linearly when the mover is opened and closed,
Each of the circuit breaker in the power reception unit, the circuit breaker in the power supply unit, the disconnector in the power reception unit, and the disconnector in the power supply unit is a unit in which the moving direction of the mover is incorporated. It is arranged to be in the depth direction,
Each of the circuit breaker in the power receiving unit, the circuit breaker in the power feeding unit, the disconnector in the power receiving unit, and the disconnector in the power feeding unit has an arrangement relationship with the bus in each unit incorporated therein. It is supposed to be arranged vertically
A gas insulated switchgear,
In the power receiving unit, a bus-side disconnector is disposed immediately below the first busbar, the circuit breaker is disposed directly below the busbar-side disconnector, and a power-receiving side disconnector is disposed directly below the circuit breaker,
The bus-side disconnector is located immediately below the bus in the center phase of the first bus so that the center of the movable-side terminal of the bus-side disconnector and the fixed-side terminal of the bus-side disconnector is located. Since it is disposed , the gas insulated switchgear can be reduced in size, the installation area can be reduced, and the assemblability can be improved .

Embodiment 1 FIG.
Embodiment 1 of the present invention will be described below with reference to FIGS. FIG. 1 is a schematic configuration diagram conceptually showing an example of the overall configuration of the gas-insulated switchgear in a plan view, and FIG. 2 is a longitudinal side view showing in cross section an example of a specific configuration of the first power receiving unit in FIG. 3 is a longitudinal sectional side view showing an example of a specific configuration of the first power supply unit in FIG. 1, FIG. 4 is a longitudinal front view showing an example of the specific configuration of the VCT unit in FIG. 1, and FIG. 1 is a longitudinal side view showing an example of a specific configuration of the second power supply unit in FIG. 1, FIG. 6 is a longitudinal side view showing an example of the specific configuration of the second power receiving unit in FIG. 1, and FIG. FIG. 8 is a functional explanatory diagram of a three-position disconnector having a normal opening / closing function and a grounding function. FIG. In addition, in each figure, the same code | symbol shows the same part.

  As shown in FIG. 1, the gas-insulated switchgear 1 includes a first power receiving unit 2, a first power supply unit 3, also referred to as a first transformer primary unit, a VCT unit 4 described later, and a second The power supply unit 5 includes a second power supply unit 5, also called a transformer primary unit, and a second power reception unit 6.

  Behind the first power supply unit 3 is disposed a first transformer TR1 whose primary side is connected to the first power supply unit 3 and whose secondary side is connected to a load (not shown).

  Behind the second power supply unit 5 is installed a second transformer TR2 whose primary side is connected to the second power supply unit 5 and whose secondary side is connected to a load (not shown).

A lower gas insulated sealed container 22 and an upper gas insulated sealed container 23 are built in the outer box 21 of the first power receiving unit 2.
Specifically, as illustrated in FIG. 2, the lower gas insulating sealed container 22 is attached to the upper surface of the bottom of the outer box 21. The upper gas insulated sealed container 23 is attached to the upper surface of the lower gas insulated sealed container 22.
In the lower gas-insulated sealed container 22, a circuit breaker CB22 and a power receiving side power disconnector DS22 are incorporated.
In the upper gas-insulated sealed container 23, a first bus BUS1 and a power-receiving system bus side disconnector DS23 are incorporated.
The power receiving side of the power receiving side disconnector DS22 is connected to the power system via a power receiving cable termination connection box CCBX22.
The busbar side of the circuit breaker CB22 and the power receiving side of the busbar side disconnector DS23 are connected via a bushing BSG penetrating the lower gas insulating sealed container 22 and the upper gas insulating sealed container 23 in an airtight manner.
The first bus BUS1 is led out to the first power supply unit 3 side through a bushing BSG that penetrates the upper gas insulating sealed container 23 in an airtight manner.
An example of a specific detailed structure of the first power receiving unit 2 having the schematic configuration as described above is as illustrated in FIG.

A lower gas insulated sealed container 32 and an upper gas insulated sealed container 33 are built in the outer box 31 of the first power supply unit 3.
Specifically, as illustrated in FIG. 3, the lower gas-insulated sealed container 32 is attached to the upper surface of the bottom of the outer box 31. The upper gas insulated sealed container 33 is attached to the upper surface of the lower gas insulated sealed container 32.
A circuit breaker CB32 is incorporated in the lower gas-insulated sealed container 32.
In the upper gas-insulated sealed container 33, a first bus BUS1, a second bus BUS2, a VCT bypass disconnector DS33 connected across both buses BUS1 and BUS2, and the second bus BUS2 And a circuit breaker DS34 connected to the circuit breaker CB32.
The power supply side of the circuit breaker CB32 is connected to the primary side of the transformer TR1 through a power supply cable starting end connection box CCBX32. That is, the power supply side of the circuit breaker CB32 is connected to the load via the transformer TR1.
The circuit breaker CB32 and the power supply system disconnector DS34 are connected via a bushing BSG that penetrates the lower gas insulating sealed container 32 and the upper gas insulating sealed container 33 in an airtight manner.
The first bus BUS1 is led out to the first power receiving unit 2 side via a bushing BSG that penetrates the upper gas insulating sealed container 33 in an airtight manner, and passes through the upper gas insulating sealed container 33 in an airtight manner. It is led out to the VCT unit 4 side through BSG.
The second bus BUS2 is led out to the VCT unit 4 side through a bushing BSG that penetrates the upper gas insulating sealed container 33 in an airtight manner.
An example of a specific detailed structure of the first power supply unit 3 having the schematic configuration as described above is as illustrated in FIG.

The outer box 41 of the VCT unit 4 includes a well-known transactional instrument transformer (transformer current transformer) VCT, gas-insulated sealed containers 42 and 43 for busbars, and gas-insulated sealed containers for disconnectors. 44 and a VCT connection tank 45 with a built-in VCT connection module are incorporated.
As illustrated in FIG. 4, the gas-insulated sealed container 42 is disposed at the upper part in the outer box 41 of the VCT unit 4 in the depth direction, and incorporates the first bus BUS1. is doing.
As illustrated in FIG. 4, the gas-insulated sealed container 43 is disposed at an upper portion in the outer box 41 of the VCT unit 4 and positioned in front of the gas-insulated sealed container 42 in the depth direction. Built-in second bus BUS2.
As shown in FIG. 4, the gas insulated sealed container 44 for incorporating the disconnector is located in the upper part of the outer box 41 of the VCT unit 4 in the depth direction from the gas insulated sealed container 43. The VCT primary side disconnector DS41 and the VCT secondary side disconnector DS42 are built in.
As shown in FIG. 4, the VCT connection tank 45 is attached to an upper part of the transaction instrument transformer VCT, and is located immediately below the gas-insulated sealed containers 42 and 43 for containing the busbars. The gas insulating sealed container 44 for incorporating the disconnector is disposed behind the depth direction. As illustrated in FIG. 4, the transaction instrument transformer VCT includes the VCT primary side disconnector DS41 and the VCT secondary side disconnector via the VCT connection module 451 in the VCT connection tank 45. Connected to the VCT side end of DS42.
The bus side of the VCT primary side disconnector DS41 is connected to the first bus BUS1 via a bushing BSG, and further connected to the power system via power receiving units 2 and 6.
The bus side of the VCT secondary side disconnector DS42 is connected to the second bus BUS2 via a bushing BSG, and further connected to a load via power supply units 3 and 5 via transformers TR1 and TR2.
One end of the first bus BUS1 is introduced into the first power supply unit 3 through a bushing BSG, and the other end is introduced into the second power supply unit 5 through a bushing BSG.
An example of a specific detailed structure of the VCT unit 4 configured as described above is as illustrated in FIG.

A lower gas insulated sealed container 52 and upper gas insulated sealed containers 53 and 54 are built in the outer box 51 of the second power supply unit 5.
Specifically, as illustrated in FIG. 5, the lower gas insulating sealed container 52 is attached to the upper surface of the bottom of the outer box 51.
The upper gas-insulated sealed container 53 is disposed in the outer box 51 so as to be located rearward in the depth direction.
The upper gas insulating sealed container 54 is disposed in the outer box 51 at a position in front of the upper gas insulating sealed container 53 in the depth direction.
A circuit breaker CB52 is incorporated in the lower gas-insulated sealed container 52.
A first bus BUS1 is built in the upper gas-insulated sealed container 53.
In the upper gas-insulated sealed container 54, a second bus BUS2 and a power supply system disconnector DS54 are incorporated.
The power supply side of the circuit breaker CB52 is connected to the primary side of the transformer TR2 via a power supply cable starting end connection box CCBX52. That is, the power supply side of the circuit breaker CB52 is connected to the load via the transformer TR2.
The circuit breaker CB52 and the power supply system disconnector DS54 are connected via a bushing BSG that penetrates the lower gas insulating sealed container 52 and the upper gas insulating sealed container 54 in an airtight manner.
The first bus BUS1 is led out to the second power receiving unit 6 side through a bushing BSG that penetrates the upper gas insulating sealed container 53 in an airtight manner, and passes through the upper gas insulated sealed container 53 in an airtight manner. It is led out to the VCT unit 4 side through BSG.
The second bus BUS2 is led out to the VCT unit 4 side through a bushing BSG penetrating the upper gas insulating sealed container 54 in an airtight manner.
An example of a specific detailed structure of the second power supply unit 5 configured as described above is as illustrated in FIG.
Instead of the bushing BSG penetrating the gas insulating sealed container 53 and the gas insulating sealed container 53 in an airtight manner, an insulating bus bar is provided between the bushing BSG penetrating the gas insulating sealed container 42 and the gas insulating sealed container 63 airtightly. Can also be connected.

A lower gas insulating sealed container 62 and an upper gas insulating sealed container 63 are built in the outer box 61 of the second power receiving unit 6.
Specifically, as illustrated in FIG. 6, the lower gas insulating sealed container 62 is attached to the upper surface of the bottom of the outer box 61. The upper gas insulated sealed container 63 is attached to the upper surface of the lower gas insulated sealed container 62.
In the lower gas-insulated sealed container 62, a circuit breaker CB62 and a power receiving system power receiving side disconnector DS62 are incorporated.
In the upper gas-insulated sealed container 63, a first bus BUS1 and a power-receiving-system bus-side disconnector DS63 are incorporated.
The power receiving side of the power receiving side disconnector DS62 is connected to the power system via the power receiving cable termination connection box CCBX62.
The bus bar side of the circuit breaker CB62 and the power receiving side of the bus bar side disconnector DS63 are connected via a bushing BSG that penetrates the lower gas insulating sealed container 62 and the upper gas insulating sealed container 63 in an airtight manner.
The first bus BUS1 is led out to the second power supply unit 3 side through a bushing BSG that penetrates the upper gas insulating sealed container 63 in an airtight manner.
An example of a specific detailed structure of the second power receiving unit 2 having the schematic configuration as described above is as illustrated in FIG.

  1 to 8, the gas insulated switchgear 1 includes the circuit breakers CB22, CB62 and the disconnectors DS22, DS23, DS62, DS63 in the gas insulated sealed containers 22, 23, 62, 63. The power receiving units 2 and 6 for receiving power from the power system, the VCT unit 4 incorporating the transaction instrument transformer VCT, the circuit breakers CB32 and CB52, and the disconnectors DS34 and DS54 are connected to the gas insulated sealed container 31. , 32, 51, 52, the power receiving unit 2 via the transaction instrument transformer VCT, the first bus (power receiving side bus) BUS1, and the second bus (power feeding side bus) BUS2. , 6, the power feeding units 3, 5 for feeding the received power to the load side, the power receiving units 2, 6, the VCT unit 4, and the power feeding units 3, 5 are arranged in a line, and the power receiving unit 2, 6 and the feeding units 3, 5 The unit 3 having a bus to which no disconnector is connected is connected to the first bus (power-receiving side bus) BUS1 and the second bus (power-feeding side bus) BUS2 in parallel with the transaction instrument transformer VCT. The VCT bypass disconnector DS33 connected across the circuit is built in.

  The gas insulated switchgear 1 includes the circuit breaker CB22 and the disconnectors DS22 and DS23 in the gas insulated sealed containers 22 and 23, the first power receiving unit 2 that receives power from the power system, and the circuit breaker. The CB62 and the disconnectors DS62, DS63 are housed in the gas-insulated sealed containers 62, 63 and receive the power from the power system, the second power receiving unit 6, the transaction instrument transformer VCT, the VCT unit 4, The circuit breaker CB32 and the disconnector DS34 are built in the gas-insulated sealed containers 31 and 32, and the power is received via the transaction instrument transformer VCT, the first bus BUS1, and the second bus BUS2. The first power supply unit 3 for supplying the power received by the unit to the load side, the circuit breaker CB52 and the disconnector DS54 are incorporated in gas-insulated sealed containers 51 and 52, and the transaction instrument transformer VCT With the first bus BUS1 The second power feeding unit 5 that feeds the power received by the power receiving unit to the load side via the second bus BUS2, the first power receiving unit 2, the second power receiving unit 6, and the The VCT unit 4, the first power supply unit 3, the second power supply unit, and 5 are arranged in parallel with the VCT unit 4 in between, and the first bus BUS1 is connected to the power receiving units 2 and 6 and the VCT. The second bus BUS2 is disposed across the VCT unit 4 and the power feeding units 3 and 5, and the power receiving units 2 and 6 are disposed across the unit 4 and the power feeding units 3 and 5. In addition, in the power supply units 3 and 5, the unit 3 having a bus to which the disconnector is not connected extends across the first bus BUS 1 and the second bus BUS 2 in parallel with the transaction instrument transformer VCT. Before connection VCT bypass disconnector DS33 is built.

  The first power feeding unit 3 is arranged between the first power receiving unit 2 and the VCT unit 4, and the second power feeding is performed between the second power receiving unit 6 and the VCT unit 4. Units 5 are arranged.

  Also, the buses u, v, w of each phase of the first bus BUS1 and the buses u, v, w of each phase of the second bus BUS2 are juxtaposed in the depth direction in the respective built-in units. (See FIGS. 2, 3, 5, 6, and 7).

  Also, the primary and secondary disconnectors DS41 and DS42 of the transaction instrument transformer VCT are disconnectors that move linearly when the mover MVC is opened and closed, as illustrated in FIG. As shown in the figure, the primary and secondary disconnectors DS41 and DS42 are arranged in the gas-insulated sealed container 44 in the VCT unit so that the linear movement of the mover MVC is in the vertical direction. A VCT connection tank 45 having a built-in connection conductor (connection module) 451 for connecting the primary and secondary disconnectors DS41 and DS42 to the transaction instrument transformer VCT is provided. The gas-insulated sealed container 44 is juxtaposed with the gas-insulated sealed container 44 in the horizontal direction with respect to the gas-insulated sealed container 44 containing the side and secondary side disconnectors DS41, DS42.

  Also, two sets of buses BUS1 and BUS2 are arranged horizontally in the depth direction above the gas-insulated switchgear 1, and the VCT bypass disconnector DS33 is a bus that is not connected to the busbar-side disconnector among the units other than the VCT unit 4. The unit 3 is arranged below the bus BUS1. With such a configuration, it is not necessary to provide a separate unit for the VCT bypass disconnector DS33, and the installation area can be reduced.

  In addition, the power receiving units 2 and 6, the power supply units (transformer primary units) 3 and 5, and the VCT unit 4 are arranged side by side, and between the two power supply units (transformer primary units) 3 and 5, The VCT primary disconnector DS41 and the VCT secondary disconnector DS42 having the vertically movable mover MVC are arranged below the bus BUS2 connected in the direction, and below the bus BUS2 and the VCT. The VCT connection tank 45 is installed on the side surface of the gas-insulated sealed container 44 containing the primary disconnector DS41 and the VCT secondary disconnector DS42 via the bushing BSG in which a connection conductor is embedded, for the VCT connection. The VCT connection module 451 is connected to the transaction instrument transformer VCT at the lower surface of the tank 45, the transaction instrument transformer VCT, the VCT primary disconnector DS41, and the front The VCT secondary disconnector DS42 is connected via the VCT connection module 451. When the two transformers TR1 and TR2 are arranged side by side, in the conventional gas-insulated switchgear disclosed in Patent Document 1, the width when the two transformers TR1 and TR2 are installed is as follows. Since the VCT unit 4 pops out, the installation area increases. However, with the above-described configuration, the VCT unit 4 is disposed between the two power supply units (transformer primary units) 3 and 5, and the power supply unit (transformer) By installing the transformers TR1 and TR2 behind the primary units 3 and 5, the installation area can be reduced.

  The gas insulated switchgear 1 incorporates the circuit breakers CB22, CB62 and the disconnectors DS22, DS23, DS62, DS63 in the gas insulated sealed containers 22, 23, 62, 63 and receives power from the power system. The power receiving units 2 and 6, the VCT unit 4 including the transaction instrument transformer VCT, the circuit breakers CB 32 and CB 52, and the disconnectors DS 34 and DS 54 are placed in the gas insulated sealed containers 32, 33, 52, 54. The power feeding unit 3 that feeds the power received by the power receiving units 2 and 6 to the load side via the transaction instrument transformer VCT, the first bus BUS1 and the second bus BUS2 5, and the buses u, v, w of each phase of the first bus BUS1 and the buses w, v, u of each phase of the second bus BUS2 are arranged in the depth direction in the respective built-in units. The circuit breakers CB22, CB62 and Each of the circuit breakers CB32 and CB52 in the power feeding units 3 and 5 is a circuit breaker in which the mover MVC moves linearly when opening and closing, and the disconnectors DS22, DS23, Each of the disconnectors DS33, DS34, DS54 in the DS62, DS63 and the power supply units 3, 5 is a disconnector in which the mover MVC moves linearly when opening and closing, and the disconnectors in the power receiving units 2, 6 Circuit breakers CB22, CB62, circuit breakers CB32, CB52 in the power supply units 3, 5; circuit breakers DS22, DS23, DS62, DS63 in the power receiving units 2, 6; All of the disconnectors DS33, DS34, DS54 are arranged so that the moving direction of the mover MVC is the depth direction of the built-in unit, and the breakers CB22, CB62 in the power receiving units 2, 6 are arranged. The circuit breakers CB32 and CB52 in the power feeding units 3 and 5 Each of the disconnectors DS22, DS23, DS62, DS63 in the units 2, 6 and the disconnectors DS33, DS34, DS54 in the power supply units 3, 5 are the buses BUS1, BUS2 in the units respectively incorporated therein. Are arranged in the vertical direction, the circuit breakers CB22 and CB62 in the power receiving units 2 and 6, the circuit breakers CB32 and CB52 in the power feeding units 3 and 5, and the power receiving units 2 and 6 The disconnecting devices DS22, DS23, DS62, DS63, and the disconnecting devices DS33, DS34, DS54 in the power supply units 3, 5 are all extended in the buses BUS1, BUS2 in the respective units. (See FIGS. 2, 3, 5, 6, and 7).

  Further, the circuit breakers CB22 and CB62 in the power receiving units 2 and 6, the circuit breakers CB32 and CB52 in the power feeding units 3 and 5, and the disconnectors DS22, DS23, DS62 and DS63 in the power receiving units 3 and 5, respectively. , And the disconnecting devices DS33, DS34, DS54 in the power supply unit, the operating devices CBOD, DSOD are provided outside the front side of the gas-insulated sealed container in each unit (see FIG. 2, see FIGS. 3, 5, and 6).

  Further, the circuit breakers CB22 and CB62 in the power receiving units 2 and 6, the circuit breakers CB32 and CB52 in the power feeding units 3 and 5, and the disconnectors DS22, DS23, DS62 and DS63 in the power receiving units 2 and 6, respectively. Each of the disconnectors DS33, DS34, DS54 in the power supply units 3, 5 is provided on the front side of the corresponding gas-insulated sealed container 22, 23, 62, 63, 32, 33, 52, 54. It is attached to the device mounting plates 22SB, 23SB, 62SB, 63SB, 32SB, 33SB, 52SB, 54SB that detachably and airtightly cover the openings 22WD, 23WD, 62WD, 63WD, 32WD, 33WD, 52WD, 54WD (FIG. 2). FIG. 3, FIG. 5 and FIG. 6).

  In the power receiving units 2 and 6, the bus-side disconnectors DS23 and DS63 are directly below the first bus BUS1, and the breakers CB22 and CB62 are directly below the bus-side disconnectors DS23 and DS63. The power receiving side disconnectors DS22 and DS62 are respectively disposed directly under CB22 and CB62 (see FIGS. 2 and 6).

  In the power receiving units 2 and 6, the first bus BUS1 and the bus-side disconnector DS23 (DS63) are incorporated in the common upper gas-insulated sealed container 23 (63), and the circuit breaker CB22 ( CB62) and the power receiving side disconnector DS22 (DS62) are incorporated in the common lower gas-insulated sealed container 22 (62) immediately below the upper gas-insulated sealed container 23 (63) (FIG. 2, (See FIG. 6).

  In the power receiving units 2 and 6, the operation devices CBOD and DSOD of the circuit breaker CB22 (CB62) and the power receiving side disconnector DS22 (DS62) are provided on the front side of the lower gas-insulated sealed container 22 (62). The power receiving cable termination junction box CCBX22 connected to the power receiving side terminal DS22RT (DS62RT) of the power receiving side disconnector DS22 (DS62) on the back side of the lower gas insulating sealed container 22 (62) (CCBX62) is disposed (see FIGS. 2 and 6).

  In the power receiving units 2 and 6, the connection terminal CCBX22T (CCBX62T) with the power receiving side terminal DS22RT (DS62RT) of the power receiving cable termination connection box CCBX22 (CCBX62) is connected to the power receiving side disconnector DS22 (DS62). It is almost the same height as the mover MVC (see FIGS. 2 and 6).

  Further, in the power receiving units 2 and 6, a grounding disconnector ES22 (ES62) for grounding the power receiving side terminal DS22RT (DS62RT) of the power receiving side disconnector DS22 (DS62) is connected to the lower gas insulating sealed container 22 (62). In the power receiving side disconnector DS22 (DS62) (see FIGS. 2 and 6).

  In the power receiving units 2 and 6, the lightning arrester AR22 (AR62) connected to the power receiving side disconnector DS22 (DS62) is connected to the power receiving side disconnector DS22 (DS62) in the lower gas-insulated sealed container 22 (62). ) (See FIGS. 2 and 6).

  In the power receiving units 2 and 6, both the bus-side disconnector DS23 (DS63) and the power-receiving side disconnector DS22 (DS62) are insulated holders having an inverted U-shaped cross section with the lower ends open for each phase. It is housed in the ISHD and supported by the insulating holder ISHD, and interphase insulation is performed by the insulating holder ISHD (see FIGS. 2 and 6).

  Further, in the power receiving units 2 and 6, both the bus-side disconnector DS23 (DS63) and the power-receiving side disconnector DS22 (DS62) are respectively connected to the insulating holder ISHD that is housed and insulated between phases. The MVST and the fixed terminal STST are supported (see FIGS. 2 and 6).

  In the power receiving units 2 and 6, the movable side terminal MVST of the bus side disconnector DS23 (DS63) and the bus side disconnector DS23 (directly below the bus v of the center phase of the first bus BUS1. The bus-side disconnector DS23 (DS63) is arranged so that the central portion of the DS63) with the fixed terminal STST is located (see FIGS. 2 and 6).

  Further, in the power supply unit 5, the disconnector DS54 of the power supply system is disposed immediately below the second bus BUS2, and the breaker CB52 is disposed directly below the disconnector DS54 (see FIG. 5). ).

  Further, in the power supply unit 5, the second bus BUS2 and the disconnector DS54 of the power supply system are built in a common upper gas insulated sealed container 54, and the circuit breaker CB52 is connected to the upper gas insulated sealed container 54. Is incorporated in the lower gas-insulated sealed container 52 immediately below (see FIG. 5).

  Further, in the power supply unit 5, a ground disconnector ES52 for grounding the power supply side terminal CB52ST of the circuit breaker CB52 is disposed in the lower gas-insulated sealed container 52 immediately below the circuit breaker CB52 (FIG. 5). See).

  Further, in the power supply unit 5, both the disconnector DS54 in the upper gas-insulated sealed container 54 and the ground disconnector ES52 in the lower gas-insulated sealed container 52 have a cross section in which the lower ends are opened for each phase. It is housed and supported in an inverted U-shaped insulation holder ISHD, and interphase insulation is performed by the insulation holder ISHD (see FIG. 5).

  Further, in the power supply unit 5, both of the disconnector DS54 in the upper gas-insulated sealed container 54 and the ground disconnector ES52 in the lower gas-insulated sealed container 52 are respectively connected to the insulating holder ISHD that is insulated between phases. The movable terminal MVST and the fixed terminal STST are supported (see FIG. 5).

  Further, in the power supply unit 5, the movable side terminal MVST of the disconnector DS54 and the disconnector DS54 in the upper gas insulating hermetic container 54 are directly below the bus v of the center phase of the second bus BUS2. The disconnector DS54 is arranged so that the central portion with the fixed terminal STST is located (see FIG. 5).

  Further, in the power supply unit 3, a VCT bypass disconnector DS33 in parallel with the transaction instrument transformer VCT is disposed directly below the first bus BUS1 (see FIG. 3).

  In the power supply unit 3, the second bus BUS2, the disconnector DS34, the first bus BUS1 and the VCT bypass disconnector DS33 are incorporated in a common upper gas-insulated sealed container 33, and A vessel CB32 is built in the lower gas-insulated sealed container 32 immediately below the upper gas-insulated sealed container 33 (see FIG. 3).

  In the power supply unit 3, each of the disconnector DS34 and the VCT bypass disconnector DS33 in the upper gas-insulated sealed container 33 and the ground disconnector ES32 in the lower gas-insulated sealed container 32 is in each phase. Each is housed and supported in an insulating holder ISHD having an inverted U-shaped cross-section with the lower end opened, and interphase insulation is performed by the insulating holder ISHD (see FIG. 3).

  Further, in the power supply unit 3, each of the disconnector DS34 and the VCT bypass disconnector DS33 in the upper gas-insulated sealed container 33 and the ground disconnector ES32 in the lower gas-insulated sealed container 32 are respectively connected to each other. A movable terminal MVST and a fixed terminal STST are supported on the insulating holder ISHD to be insulated (see FIG. 3).

  Further, in the power feeding unit 3, the movable side terminal MVST of the VCT bypass disconnector DS33 and the fixed side terminal STST of the disconnector DS33 are directly below the central phase bus v of the first bus BUS1. The disconnector DS33 is arranged so that the center portion is located, and the movable side of the disconnector DS34 directly below the second bus BUS2 is directly below the bus v of the center phase of the second bus BUS2. The disconnector DS34 is disposed so that the center of the terminal MVST and the fixed-side terminal STST of the disconnector DS34 is located (see FIG. 3).

  In the power supply units 3 and 5, an operating device CBOD for the circuit breaker CB32 (CB52) is disposed on the front side of the lower gas insulated sealed container 32 (52), and the lower gas insulated sealed container 32 (52 ) Is provided with the power supply cable start end connection box CCBX32 (CCBX52) connected to the power supply side terminal CB32ST (CB52ST) of the circuit breaker CB32 (CB52) (see FIGS. 3 and 5). reference).

  In the power supply units 3 and 5, the connection terminal CCBX32T (CCBX52T) of the power supply cable starting end connection box CCBX32 (CCBX52) and the power supply side terminal CB32ST (CB52ST) is movable of the circuit breaker CB32 (CB52). It is almost the same height as the child MBC (see FIGS. 3 and 5).

  Further, in the gas insulated switchgear 1, the disconnectors DS23, DS33, DS63 located on the back side are connected to the first bus BUS1 located on the back side via a connection conductor BDCC, and on the back side. In the disconnector DS23 (DS63), the terminal CB22BT (CB62BT) on the back side of the circuit breaker CB22 (CB62) has a bushing BSG that hermetically penetrates the gas-insulated sealed containers 22, 23 (62, 63). The disconnectors DS34 and DS54 located on the front side are connected to the second bus BUS2 located on the front side via the connection conductor BDCC and connected to the second bus BUS2 located on the front side. (DS54) is connected to a terminal CB32FT (CB52FT) on the front side of the circuit breaker CB32 (CB52) via a bushing BSG that penetrates the gas-insulated sealed containers 32, 33 (52, 54) in an airtight manner. (See FIGS. 2, 3, 5, and 6).

  The gas-insulated sealed containers 22, 23, 32, 33, 34, 42, 43, 44, 45, 52, 53, 54, 62, and 63 are all grounded metal containers, and all are SF6 gas. Insulating gas such as dry air or nitrogen gas is enclosed.

Further, in the power receiving unit 2, the circuit breaker CB22 and the disconnector DS22 are attached to the mounting plate 22SB which covers each opening 22WD of the gas insulated sealed container 22 in an airtight manner and is detachably attached to the gas insulated sealed container 22. The ground switch ES22 and the lightning arrester AR22 are structured to be attached, that is, the attachment plate 22SB is a common attachment plate for a plurality of devices.
Therefore, it is possible to pre-assemble a plurality of devices such as the circuit breaker CB22, the disconnect switch DS22, the grounding switch ES22, the lightning arrestor AR22, etc. outside the outer box of the switchgear. improves. This is the same for the mounting plates 32SB, 52SB, 62SB of the other units 3-6.

  The disconnectors DS23, DS33, DS34, DS54, and DS63 are three-position disconnectors having a normal switching function and a grounding function.

  As shown in FIG. 8, the principle of the three-position disconnector is a closed position (a), an open position (b), and a grounding position (c) depending on the position of the mover MVC that moves linearly. That is, the stator STC at the center is selectively energized, de-energized, or grounded depending on the position of the mover MVC.

As described above, the gas-insulated switchgear according to Embodiment 1 of the present invention adopts various new structures different from the conventional gas-insulated switchgear described in Patent Document 1, and is reduced in size and occupied area. Various effects such as a reduction in the size, improvement in assembling performance and assembly efficiency, reduction in the number of connection conductors in the gas-insulated switchgear, and simplification of the connection path in the gas-insulated switchgear occur.
Embodiment 2. FIG.

A second embodiment of the present invention will be described below with reference to FIG. FIG. 9 illustrates another example of the power receiving unit 2. A disconnector DS24 is disposed immediately below the second bus BUS2, and the disconnector DS24, the disconnector DS23, and the first bus BUS1. The second bus BUS2 is built in a common gas-insulated sealed container 24. Thus, the space immediately below the buses BUS1 and BUS2 is used effectively. The disconnector DS24 may be a VCT bypass disconnector DS33.
Embodiment 3 FIG.

A third embodiment of the present invention will be described below with reference to FIG. FIG. 10 illustrates another example of the VCT unit 4 in which the VCT bypass disconnector DS33 is disposed immediately above the buses BUS1 and BUS2, and the extending direction of the VCT bypass disconnector DS33 and the buses BUS1 and BUS2 are illustrated. By installing the VCT bypass disconnector DS33 so as to intersect with the extending direction, it can be made compact.
Embodiment 4 FIG.

  A fourth embodiment of the present invention will be described below with reference to FIG. FIG. 11 shows another example of the power supply unit 5. An operation device CBOD of the circuit breaker CB52 is disposed on the front side of the lower gas insulated sealed container 52, and the rear side of the lower gas insulated sealed container 52 is shown. In addition, a gas-insulated sealed container 55 connected to the load side through a bushing BSG connected to the power supply side terminal CB52ST of the circuit breaker CB52 is disposed. The height of the bushing BSG is the same as that of the mover of the circuit breaker CB52.

The gas-insulated sealed container 55 provided on the back side may be provided in the other units 2, 3, 6. When the gas insulated sealed container 55 is provided in the power receiving units 2 and 6, the operation of each of the circuit breakers CB22 and CB62 and the power receiving side disconnectors DS22 and DS62 is provided on the front side of the lower gas insulated sealed containers 22 and 62. Devices CBOD and DSOD are installed, and on the back side of the lower gas-insulated sealed containers 22 and 62, on the power system side via the bushing BSG connected to the power receiving side terminals DS22RT and DS62RT of the power receiving side disconnectors DS22 and DS62 The gas-insulated airtight container 55 connected to is disposed. Further, the height of the bushing BSG is preferably substantially the same as that of the mover MVC of the power receiving side disconnectors DS22 and DS62 in order to reduce the number of connecting conductors.
Embodiment 5 FIG.

  The fifth embodiment of the present invention will be described below with reference to FIG. FIG. 12 conceptually shows in plan view another example of the overall configuration of the gas-insulated switchgear, and shows an example in which the VCT bypass disconnector DS33 is built in the second power supply unit 5. The same effects as those of the first embodiment built in the power supply unit 3 are obtained. In the fifth embodiment, a connection unit 7 is further added between the second power feeding unit 5 and the VCT unit 4.

  In the connection unit 7, the disconnectors DS71 and DS72 for connecting the second bus BUS2 are built in the gas insulated sealed container 72, and the disconnectors DS73 and DS74 for connecting the first bus BUS1 are built in the gas insulated sealed container 73. The configuration is as follows.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows Embodiment 1 of this invention, and is a schematic block diagram which shows notionally an example of the whole structure of a gas insulation switchgear with a top view. It is a figure which shows Embodiment 1 of this invention, and is a vertical side view which shows an example of the specific structure of the 1st power receiving unit in FIG. 1 in a cross section. It is a figure which shows Embodiment 1 of this invention, and is a vertical side view which shows an example of the specific structure of the 1st electric power feeding unit in FIG. 1 in a cross section. It is a figure which shows Embodiment 1 of this invention, and is a vertical front view which shows an example of the concrete structure of the VCT unit in FIG. 1 in a cross section. It is a figure which shows Embodiment 1 of this invention, and is a vertical side view which shows an example of the concrete structure of the 2nd electric power feeding unit in FIG. 1 in a cross section. It is a figure which shows Embodiment 1 of this invention, and is a vertical side view which shows an example of the concrete structure of the 2nd power receiving unit in FIG. 1 in a cross section. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows Embodiment 1 of this invention, and is a top view which shows notionally an example of the relationship of arrangement | positioning of the bus-bar and a circuit breaker seen planarly. It is a figure which shows Embodiment 1 of this invention, and is function explanatory drawing of the 3 position disconnector which has a normal switching function and a grounding function. It is a figure which shows Embodiment 2 of this invention, and is a vertical side view which shows the other example of the 1st power receiving unit illustrated in FIG. 2 in a cross section. It is a figure which shows Embodiment 3 of this invention, and is a vertical front view which shows the other example of the VCT unit illustrated in FIG. 4 in a cross section. It is a figure which shows Embodiment 4 of this invention, and is a vertical side view which shows the other example of the connection part of the back side in a cross section. It is a figure which shows Embodiment 5 of this invention, and is a schematic block diagram which shows notionally the other example of the whole structure of a gas insulation switchgear with a top view.

Explanation of symbols

1 gas insulated switchgear,
2 First power receiving unit,
21 outer box,
22 Lower gas insulated sealed container,
23 Upper gas insulated sealed container,
BUS1 first bus,
BUS2 second bus,
CB22 circuit breaker,
CCBX22 power receiving cable termination box,
DS22 Power receiving side disconnector,
DS23 Bus disconnector,
DS24 disconnect switch,
3 First power supply unit,
31 outer box,
32 Lower gas insulated sealed container,
33 Upper gas insulated sealed container,
CB32 circuit breaker,
CB32BT circuit breaker CB22 rear terminal,
CB32FT circuit breaker CB22 front terminal,
CCBX32 feeding cable start-end connection box,
CCBX52 feeding cable start-end connection box,
DS33 VCT bypass disconnector,
DS34 disconnector of power supply system,
4 VCT units,
41 outer box,
42, 43 Gas-insulated sealed containers for busbars,
44 Gas-insulated airtight container for built-in disconnector,
45 VCT connection tank,
451 VCT connection module,
DS41 VCT primary disconnector,
DS42 VCT secondary disconnector,
5 Second power supply unit,
51 outer box,
52 Lower gas insulated sealed container,
53, 54 Upper gas insulated container,
55 gas-insulated sealed containers,
CB52 circuit breaker,
DS54 power supply disconnector,
6 Second power receiving unit,
61 outer box,
62 Lower gas insulated sealed container,
63 Upper gas insulated sealed container,
CB62 circuit breaker,
DS62 Power receiving side disconnector,
DS63 Busbar side disconnector,
7 Connection unit,
71 outer box,
72, 73 Gas-insulated sealed containers,
DS71, DS72, DS73, DS74 disconnector,
CCBX62 power receiving cable termination box,
DS22RT (DS62RT) Power-receiving side disconnector DS22 (DS62) power-receiving side terminal,
CCBX22T (CCBX62T) Power receiving cable termination connection box CCBX22 (CCBX62) connection terminal,
AR22 (AR62) Arrester,
BSG bushing,
ES52 ground disconnector,
22SB, 32SB, 52SB, 62SB mounting plate,
22WD, 32WD, 52WD, 62WD Openings of gas-insulated sealed containers 22, 32, 52, 62,
ISHD insulation holder,
MVC mover,
MVST movable terminal,
STST fixed terminal,
TR1, TR2 transformer,
u, v, w Buses for each phase.

Claims (28)

Built-in circuit breaker and disconnector in gas insulated sealed container, power receiving unit for receiving power from power system, VCT unit incorporating transaction instrument transformer VCT, and circuit breaker and disconnector in gas insulated sealed container A power feeding unit that feeds the power received by the power receiving unit to the load side through the transaction instrument transformer VCT, the first bus and the second bus;
The buses of the respective phases of the first bus and the buses of the respective phases of the second bus are arranged in parallel in the depth direction in the respective built-in units,
Both of the circuit breaker in the power receiving unit and the circuit breaker in the power supply unit are circuit breakers in which the mover moves linearly when opening and closing,
Both of the disconnector in the power receiving unit and the disconnector in the power supply unit are disconnectors that move linearly when the mover is opened and closed,
Each of the circuit breaker in the power reception unit, the circuit breaker in the power supply unit, the disconnector in the power reception unit, and the disconnector in the power supply unit is a unit in which the moving direction of the mover is incorporated. It is arranged to be in the depth direction,
Each of the circuit breaker in the power receiving unit, the circuit breaker in the power feeding unit, the disconnector in the power receiving unit, and the disconnector in the power feeding unit has an arrangement relationship with the bus in each unit incorporated therein. It is supposed to be arranged vertically
A gas insulated switchgear,
In the power receiving unit, a bus-side disconnector is disposed immediately below the first busbar, the circuit breaker is disposed directly below the busbar-side disconnector, and a power-receiving side disconnector is disposed directly below the circuit breaker,
The bus-side disconnector is located immediately below the bus in the center phase of the first bus so that the center of the movable-side terminal of the bus-side disconnector and the fixed-side terminal of the bus-side disconnector is located. Arranged
A gas insulated switchgear characterized by that . The gas insulated switchgear according to claim 1,
Any of the circuit breaker in the power receiving unit, the circuit breaker in the power feeding unit, the disconnector in the power receiving unit, and the disconnector in the power feeding unit, the operation device is the gas insulation in the unit in which each is incorporated. Provided outside the front side of the sealed container
A gas insulated switchgear characterized by that . The gas insulated switchgear according to claim 2 ,
Each of the circuit breaker in the power reception unit, the circuit breaker in the power supply unit, the disconnector in the power reception unit, and the disconnector in the power supply unit each correspond to an opening on the front side of the gas insulated sealed container. A gas-insulated switchgear, characterized in that the gas-insulated switchgear is attached to a device mounting plate that detachably and hermetically covers the part . The gas insulated switchgear according to claim 1 ,
The first busbar and the busbar side disconnector are housed in a common upper gas-insulated sealed container;
The gas insulated switchgear characterized in that the circuit breaker and the power receiving side disconnector are housed in a common lower gas insulated sealed container directly below the upper gas insulated sealed container . The gas insulated switchgear according to claim 4 ,
On the front side of the lower gas-insulated sealed container, each operating device of the circuit breaker and the power receiving side disconnector is disposed,
A gas insulated switchgear characterized in that a power receiving cable termination connection box connected to a power receiving side terminal of the power receiving side disconnector is disposed on the back side of the lower gas insulating sealed container. . The gas insulated switchgear according to claim 5 ,
The gas insulation characterized in that a connection terminal of the power receiving cable termination junction box to a power receiving side terminal of the power receiving side disconnector is substantially the same height as a movable element of the power receiving side disconnector. Switch gear. The gas insulated switchgear according to claim 4 ,
A gas insulation switch, wherein a grounding switch for grounding a power receiving side terminal of the power receiving side disconnector is disposed immediately below the power receiving side disconnector in the lower gas insulating sealed container. gear. The gas insulated switchgear according to claim 4 ,
A gas insulated switchgear characterized in that a lightning arrester connected to the power receiving side disconnector is disposed immediately below the power receiving side disconnector in the lower gas insulating sealed container . In the gas insulated switchgear according to claim 1 or 4 ,
Both the bus-side disconnector and the power receiving-side disconnector are housed in an inverted U-shaped insulating holder whose lower end is opened for each phase, and interphase insulation is performed by the insulating holder. A gas insulated switchgear characterized by that. The gas insulated switchgear according to claim 9 ,
A gas-insulated switchgear characterized in that both the bus-side disconnector and the power-receiving-side disconnector each have a movable-side terminal and a fixed-side terminal supported by the insulation holder that is insulated between phases. . The gas insulated switchgear according to claim 1 ,
The gas insulated switchgear characterized in that, in the power supply unit, the disconnector is disposed immediately below the second bus bar, and the breaker is disposed directly below the disconnector . The gas insulated switchgear according to claim 11,
The second bus bar and the disconnector are housed in a common upper gas-insulated sealed container;
The gas insulated switchgear characterized in that the circuit breaker is built in a lower gas insulated sealed container immediately below the upper gas insulated sealed container . In gas insulated switchgear according to claim 1 2,
A gas-insulated switchgear, wherein a ground switch for grounding a power supply side terminal of the circuit breaker is disposed immediately below the circuit breaker in the lower gas-insulated sealed container . In gas insulated switchgear according to claim 1 3,
Both of the disconnector in the upper gas-insulated sealed container and the ground switch in the lower gas-insulated sealed container are housed in an inverted U-shaped insulating holder whose lower end is opened for each phase, A gas insulated switchgear characterized in that interphase insulation is performed by the insulating holder. The gas insulated switchgear according to claim 14,
Both the disconnect switch in the upper gas insulated sealed container and the ground switch in the lower gas insulated sealed container each have a movable side terminal and a fixed side terminal supported by the insulating holder that is insulated between each other. <br/> A gas insulated switchgear characterized by the above. The gas insulated switchgear according to claim 15,
The central part of the movable-side terminal of the disconnector and the fixed-side terminal of the disconnector in the upper gas-insulated sealed container is located immediately below the central phase bus of the second busbar. A gas insulated switchgear characterized in that a disconnector is provided . In gas insulated switchgear according to claim 1 1,
The gas insulated switchgear characterized in that, in the power supply unit, a VCT bypass disconnector in parallel with the transaction instrument transformer VCT is disposed immediately below the first busbar . The gas insulated switchgear according to claim 17,
The second busbar, the disconnector, the first busbar and the VCT bypass disconnector are housed in a common upper gas-insulated sealed container;
The gas insulated switchgear characterized in that the circuit breaker is built in a lower gas insulated sealed container immediately below the upper gas insulated sealed container . The gas insulated switchgear according to claim 18,
Each of the disconnector and the VCT bypass disconnector in the upper gas-insulated sealed container and the grounding switch in the lower gas-insulated sealed container has an inverted U-shaped cross-section with a lower end opened for each phase. A gas-insulated switchgear that is housed in an insulating holder and is insulated between phases by the insulating holder . The gas insulated switchgear according to claim 19 ,
All of the disconnector and the VCT bypass disconnector in the upper gas-insulated sealed container and the grounding switch in the lower gas-insulated sealed container are respectively connected to the insulating holder that is insulated between the phase, the movable terminal and the fixed A gas insulated switchgear characterized in that side terminals are supported . The gas insulated switchgear according to claim 20,
The disconnector is arranged so that a central portion of the movable side terminal of the VCT bypass disconnector and the fixed side terminal of the disconnector is located directly below the central phase bus of the first busbar. ,
The central part of the movable-side terminal of the disconnector and the fixed-side terminal of the disconnector located immediately below the second busbar is located directly below the central phase busbar of the second busbar. A gas insulated switchgear characterized in that a disconnector is provided . The gas insulated switchgear according to claim 11 or claim 17 ,
On the front side of the lower gas-insulated sealed container, an operating device for the circuit breaker is disposed,
A gas insulated switchgear characterized in that a power supply cable start end connection box connected to a power supply side terminal of the circuit breaker is disposed on the back side of the lower gas insulated sealed container . The gas insulated switchgear according to claim 22,
The gas-insulated switchgear , wherein a connection terminal of the power supply cable starting end connection box to a power supply side terminal of the circuit breaker is substantially the same height as a movable element of the circuit breaker . The gas insulated switchgear according to claim 1 ,
The disconnector located on the back side is connected to the first bus located on the back side via a connecting conductor,
The disconnector located on the back side is connected to a terminal on the back side of the circuit breaker via a bushing that penetrates the gas-insulated sealed container in an airtight manner,
The disconnector located on the front side is connected to the second bus located on the front side via a connecting conductor,
The gas disconnection switch located on the front side is connected to a terminal on the front side of the circuit breaker via a bushing that penetrates the gas-insulated sealed container in an airtight manner. Insulated switchgear. The gas insulated switchgear according to claim 4 ,
On the front side of the lower gas-insulated sealed container, each operating device of the circuit breaker and the power receiving side disconnector is disposed,
A gas insulated sealed container connected to the power system side through a bushing connected to a power receiving side terminal of the power receiving side disconnector is disposed on the back side of the lower gas insulating sealed container. Gas insulated switchgear characterized by. The gas insulated switchgear according to claim 25,
The gas insulated switchgear , wherein the bushing is substantially the same height as the mover of the power receiving side disconnector . The gas insulated switchgear according to claim 11 or claim 17 ,
On the front side of the lower gas-insulated sealed container, an operating device for the circuit breaker is disposed,
A gas-insulated sealed container connected to the load side via a bushing connected to a power supply side terminal of the circuit breaker or the ground switch is disposed on the back side of the lower gas-insulated sealed container. A gas insulated switchgear characterized by that. The gas insulated switchgear according to claim 27 ,
The gas-insulated switchgear, wherein the bushing is substantially the same height as the mover of the circuit breaker or ground switch.

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