TWI896106B - Gas insulated switchgear - Google Patents

Abstract

Provided is a gas insulated switchgear (100) that comprises a plurality of disconnector modules (10) and a circuit breaker module (30), the plurality of disconnector modules (10) are arranged such that the central axe of the first pressure tank (11A to 11C) are parallel to each other, each of the first pressure tank (11A to 11C) and the second pressure tank (11D) has at least one second opening (11K2) on a side surface thereof, the adjacent disconnector modules (10) and the adjacent disconnector module (10) and the adjacent circuit breaker module (30) connect the second openings (11K2) to each other to form one closed space (100R), insulating gas is sealed in the closed space (100R), the plurality of disconnector modules (10) are arranged so that the central axe (PA to PC) of the first pressure tank (11A to 11C) are horizontal to each other.

Description

Gas Insulation Switches

This disclosure relates to a gas-insulated switch device.

Gas-insulated switching devices house devices such as circuit breakers and circuit breakers in a pressure tank filled with a highly insulating gas, such as sulfur hexafluoride (SF6). Furthermore, the excellent insulating properties of the insulating medium allow for miniaturization of the device, thereby contributing to a reduction in the space required for installation. For example, as shown in Patent Document 1, multiple devices are housed in a cubic pressure tank, minimizing the installation area.

[Prior Art Literature] [Patent Literature]

Patent Document 1: Japan International Publication No. WO2016/157495

However, when the insulating medium enclosed in the pressure tank is changed to one with a lower GWP (Global Warming Potential), the GWP value is generally inversely proportional to the insulation performance. Therefore, the insulation distance between the internal equipment and the main circuit conductors needs to be increased, which will increase the volume of the pressure tank.

As a result, the size of the gas insulation switch device increases, limiting its installation space. While it is possible to maintain insulation performance by increasing the pressure of the insulating medium without increasing the insulation distance, in a cubic pressure channel configuration such as that described in Patent Document 1, to suppress deformation of the pressure channel due to internal pressure increases, the steel plates forming the pressure channel must be thickened or additional reinforcements must be provided, increasing the manufacturing cost of the gas insulation switch device.

This disclosure discloses a technology for solving the above-mentioned problems. Its purpose is to provide a low-cost gas-insulated switch device that can reduce the installation area even if the sealing pressure of the insulating medium increases.

The gas-insulated switch device disclosed herein comprises a plurality of circuit breaker modules and breaker modules; wherein the circuit breaker module comprises: a first cylindrical pressure groove having a first opening at one end in the central axis direction, and the first opening is closed by a cover; and a circuit breaker is disposed in the first pressure groove and opens and closes the main circuit along the central axis of the first pressure groove; the breaker module comprises: a second cylindrical pressure groove having a third opening at at least one end in the central axis direction, and the third opening is closed by a cover; and the breaker is disposed in the second pressure groove and opens and closes the main circuit along the central axis of the first pressure groove. The second pressure trough is arranged so that the central axis of the first pressure trough is parallel to the central axis of the second pressure trough, thereby interrupting the main circuit. The plurality of circuit breaker modules are arranged so that the central axes of the first pressure trough are parallel to each other. The first pressure trough and the second pressure trough each have at least one second opening on a side surface. Adjacent circuit breaker modules and adjacent circuit breaker modules and breaker modules are connected at the second openings, and all of the first pressure troughs and the second pressure troughs form a closed space. An insulating gas is enclosed in the closed space. The plurality of circuit breaker modules are arranged so that the central axes of the first pressure troughs are parallel to each other.

The gas-insulated switch device disclosed herein can provide a compact and inexpensive gas-insulated switch device that can reduce the installation area even when the sealing pressure of the insulating medium is increased.

4, 4A, 4B, 4C: Cable terminals

5: Busbar conductor

8,82: Cover

9: Circuit breaker operating mechanism

10, 10A, 10B, 10C, 210, 310, 410: Circuit breaker modules

11, 11A, 11B, 11C, 11D, 211, 311, 411: Pressure grooves

11F, 11AF, 11BF, 11CF, 11DF: Flange

11K2, 11AK2, 11BK2, 11CK2, 11DK2: Flange opening

11K, 11DK, 411K2: Opening

11L,211L: wall

12: Cable side conductor

13: Busbar side conductor

14: Conductor plate

15: Insulation Support Department

16: Insulation Sleeve

17: Main circuit conductor

18: Input and output conductors

19: Insulated

20, 20A, 20B, 20C: Circuit breaker

30: Breaker module

31: Busbar connecting conductor

32: Operation Department

40: Shutoff

81: Covering the Communication Department

91: Drive shaft

100, 200, 300, 400: Gas Insulation Switches

100R: Enclosed Space

217: Main circuit conductor

M: Groove

P, PA, PB, PC, PD: Center axis

R1, R2: O-ring

Figure 1 is a front view of the gas-insulated switch device of embodiment 1.

Figure 2 is a perspective diagram showing the structure of the circuit breaker module of embodiment 1.

Figure 3 is a perspective diagram showing the structure of the circuit breaker module of embodiment 1.

Figure 4 is a top perspective view of the gas-insulated switch device of embodiment 1.

Figure 5 is a perspective view of the interrupter module of embodiment 1 when viewed in the direction of arrow B in Figure 4.

Figure 6 is a single-line circuit diagram of the gas-insulated switch device of Implementation Type 1.

Figure 7 is a perspective diagram showing the structure of the circuit breaker module of embodiment 2.

Figure 8 is a perspective diagram showing the structure of the circuit breaker module of embodiment 3.

Figure 9 is a perspective schematic diagram showing the structure of the circuit breaker module of embodiment 4.

Implementation Type 1.

The following diagrams illustrate the gas-insulated switch device of embodiment 1.

In addition, in each figure, the same symbols indicate the same or equivalent parts.

Figure 1 is a front view of a gas-insulated switch device 100 according to embodiment 1.

Figure 2 is a perspective diagram showing the structure of the circuit breaker module 10 (10A). Figure 2 is a perspective diagram when viewing the circuit breaker module 10 in Figure 1 in the direction of arrow A. Figure 2 shows the main circuit closed state.

Figure 3 is a perspective diagram showing the structure of the circuit breaker module 10. Figure 3 is a perspective diagram of the circuit breaker module 10 in Figure 1 viewed in the direction of arrow A. Figure 3 shows the main circuit disconnected.

FIG4 is a top perspective view of the gas-insulated switch device 100.

As shown in Figure 1, the gas-insulated switch device 100 is composed of three circuit breaker modules 10 and one interrupter module 30.

Hereinafter, when referring to the three circuit breaker modules 10 individually, they are referred to as circuit breaker modules 10A, 10B, and 10C. Circuit breaker modules 10A, 10B, and 10C are identical in structure. However, while circuit breaker modules 10A, 10B, and 10C share the same structure, the power supply is connected to circuit breaker module 10C. Therefore, the direction of electrical energy flowing in circuit breaker module 10C is opposite to that of circuit breaker modules 10A, 10B, and 10C. Furthermore, components marked with an A are components of circuit breaker module 10A. Similarly, components marked with a B are components of circuit breaker module 10B. Symbols marked with C indicate components of the circuit breaker module 10C.

The circuit breaker module 10 is composed of a pressure tank 11 and a circuit breaker 20 housed within the pressure tank 11. The circuit breaker modules 10A, 10B, 10C, and the interrupter module 30 are serially connected.

Pressure tanks 11A, 11B, and 11C (first pressure tanks) are arranged with their respective center axes PA, PB, and PC parallel and horizontal to each other. They have openings 11K (first openings) at one end (near the front side of Figure 1 ) in the direction of the center axes PA, PB, and PC, as shown in Figure 2 . As described above, circuit breakers 20A, 20B, and 20C are mounted within pressure tanks 11A, 11B, and 11C, respectively. While pressure tanks 11A, 11B, and 11C are shown with their center axes PA, PB, and PC horizontal to each other, this orientation is not necessarily required.

Pressure groove 11D (second pressure groove) is arranged with its central axis PD perpendicular to the lead axis and has openings 11DK (third openings) at its upper and lower ends. Specifically, pressure groove 11D is arranged with its central axis PD perpendicular to the central axes PA, PB, and PC of pressure grooves 11A, 11B, and 11C, respectively. While pressure groove 11D is shown as being arranged with its central axis PD perpendicular to the central axes PA, PB, and PC of circuit breaker modules 10A, 10B, and 10C, this orientation is not required.

A circuit breaker 40 is installed inside the pressure tank 11D. The circuit breaker 40 blocks the high current flowing through the main circuit along the central axis PD of the pressure tank 11D. The opening can be opened on only one side. The opening 11DK is sealed by a lid 82.

As shown in Figure 2, the end of the pressure groove 11, on the opposite side of the opening 11K in the direction of the central axis P, is a curved wall 11L. The opening 11K is attached to the lid 8 via an O-ring R1. The O-ring R1 is housed in a groove M formed along the outer edge of the lid 8. Therefore, the interior of the pressure groove 11 remains airtight with respect to the outside.

The circuit breaker 20 includes a circuit breaker operating mechanism 9, a drive shaft 91, a cable-side conductor 12, a conductor plate 14, a busbar-side conductor 13, an insulating bushing 16, input and output conductors 18, and an insulating support 15.

The circuit breaker operating mechanism 9, which opens and closes the circuit breaker 20, is secured to the surface of the cover 8 that forms the outer surface of the pressure channel 11. A drive shaft 91, which extends through the cover 8, connects the circuit breaker operating mechanism 9, located outside the pressure channel 11, to the conductive plate 14, which serves as the on/off actuator for the main circuit of the circuit breaker 20 within the pressure channel 11. Furthermore, the drive shaft 91 and the cover 8 are airtightly connected within the cover through-hole 81.

On the inner surface of the cover 8, which serves as the pressure groove 11, the cable-side conductor 12 of the circuit breaker 20, the busbar-side conductor 13 of the circuit breaker, and the conductor plate 14 connecting the main circuits via the circuit breaker operating mechanism 9 are supported via insulating support portions 15.

Furthermore, as shown in Figures 2 and 3, an insulating sleeve 16 for connecting the cable terminal 4 is mounted on the lower portion of the cover 8, maintaining airtightness via an O-ring R2. The insulating sleeve 16 is connected to the cable-side conductor 12 via an input/output conductor 18. The cable terminal 4 is connected to the outer portion of the pressure groove 11 of the insulating sleeve 16. In addition, although only one of each of the cable-side conductor 12, busbar-side conductor 13, drive shaft 91, conductor plate 14, insulating bushing 16, and input/output conductor 18 is depicted in Figures 2 and 3, three sets are arranged from the front to the back of the pages of Figures 2 and 3, indicating three phases. By driving the three drive shafts 91 with a single circuit breaker operating mechanism 9, the three-phase main circuit can be disconnected (opened and closed) along the center axis P of the pressure tank 11.

As shown in Figures 1 and 2, when viewing the pressure trough 11 from the side indicated by arrow A in Figure 1, three insulators 19 are arranged at the bottom of the longitudinally deep wall 11L of the pressure trough 11, facing the longitudinally deep wall 11L and along the central axis P (PA). In practice, the three insulators 19 are arranged so as to be offset in the horizontal direction.

Furthermore, the three busbar conductors 5 are supported from below by insulators 19 and arranged horizontally, perpendicular to the center axis of the pressure trough 11. Specifically, each busbar conductor 5 extends horizontally from the front of the page in Figure 2 toward the back, and as shown in Figure 4 , is arranged parallel to one another. As shown in Figures 2 and 3 , the three busbar conductors 5 are connected to the three busside conductors 13 via main circuit conductors 17 .

As shown in Figure 4, fastening flanges 11F (11AF, 11BF, 11CF, 11DF) with flange openings 11K2 (11AK2, 11BK2, 11CK2, 11DK2) are provided on both sides of the pressure tanks 11 (11A, 11B, 11C, 11D). A cover 82 is secured to flange 11AF on one side of pressure tank 11A, ensuring airtightness within pressure tank 11. The other flange 11AF is bolted together with flange 11BF on one side of adjacent pressure tank 11B, thereby connecting circuit breaker modules 10A and 10B.

FIG5 is a perspective view of the interrupter module 30 when viewed in the direction of arrow B in FIG4 .

As shown in Figure 5, fastening flanges 11DF with flange openings 11DK2 are provided on both sides of the pressure groove 11D of the circuit breaker module 30. As shown in Figure 1, one flange 11DF is bolted together with the other flange 11BF with flange opening 11BK2 of the adjacent pressure groove 11B, thereby connecting the circuit breaker module 10B and the circuit breaker module 30. Furthermore, while the operating portion 32 of the circuit breaker module 30 is located at the top in Figures 1 and 5, it can also be located at the bottom.

As shown in Figure 1, the other flange portion 11DF is bolted together with the flange portion 11CF having the flange opening 11CK2 on one side of the adjacent pressure trough 11C, thereby connecting the circuit breaker module 10B and the interrupter module 30. A cover 82 is secured to the flange portion 11CF having the flange opening 11CK2 on the other side of the pressure trough 11C, sealing the pressure trough 11 to ensure airtightness. Furthermore, regarding the pressure trough 11D, the two flange portions 11DF are offset in the direction of the central axis PD due to the placement of the interrupter 40.

In this manner, the gas-insulated switchgear 100 is configured to continuously connect any number of circuit breaker modules 10 and interrupter modules 30. Furthermore, the interrupter modules are positioned vertically relative to the ground to optimize installation space. The actual length of the interrupter module 30 is longer than that of the circuit breaker module 10. Therefore, to minimize the overall installation space, the interrupter module 30 is installed vertically.

As shown in Figures 4 and 5, one busbar connecting conductor 31 is connected to the busbar conductor 5 that passes through the flange opening 11DK2 of the pressure trough 11D and the flange opening 11BK2 of the pressure trough 11B, thus penetrating the circuit breaker module 10B and the circuit breaker module 10A. The other busbar connecting conductor 31 is connected to the busbar conductor 5 of the circuit breaker module 10C through the flange opening 11DK2 of the pressure trough 11D. In Figure 5, the left and right busbar connecting conductors 31 appear to be separate, but there are actually three busbar connecting conductors 31 arranged toward the back of the page.

FIG6 is a single-line circuit diagram of the gas-insulated switch device 100.

The two circuits on the left represent circuit breakers 20A and 20B, while the circuit on the right shows circuit breaker 20C and interrupter module 30. The modules are connected by busbar conductor 5. Cable terminals 4A and 4B correspond to the two cables. In Figure 6, cable terminal 4C is connected to the power source.

In the gas-insulated switchgear 100 shown in Figure 1 , the flange openings 11K2 and 11DK2 of each circuit breaker module 10 and interrupter module 30 ensure airtightness by connecting to the cover 8 or the adjacent flange 11F. Therefore, the interior of the gas-insulated switchgear 100 is a closed space 100R that is airtight from the outside. Furthermore, all conductors comprising the circuit breaker 20, circuit breaker 40, and main circuit within pressure tanks 11A through 11D are sealed and insulated by pressurizing an insulating medium such as sulfur hexafluoride (SF6) gas or dry air within each pressure tank 11A through 11D.

As shown in Figure 1, a circuit breaker 20 or a disconnector 40 is housed in a cylindrical pressure tank 11. The openings of the pressure tank 11 are connected to a cover 8, which has a thickness equal to or greater than that of the pressure tank 11, or to flanges 11AF through 11DF. This secures the pressure tank 11 against the internal pressure generated by the insulating medium pressurized and sealed within the pressure tank 11, ensuring the airtightness of the gas-insulated switchgear 100.

For example, compared to the box-shaped pressure trough of Patent Document 1, which is made of stainless steel with a thickness of approximately 6 mm, the pressure trough 11 of this embodiment, cast from aluminum with a thickness of approximately 20 mm, can be expected to achieve 10 times the pressure resistance. This means that the pressure trough 11 can be used without significantly increasing the outer dimensions of the pressure trough 11 to ensure the insulation distance between the components, thereby increasing the sealing pressure of the insulating medium. This makes it possible to use dry air as the insulating medium, which, while having a low global warming potential, cannot achieve insulation performance without increasing the sealing pressure. Furthermore, since the thickness of the pressure groove 11 can be reduced, the manufacturing cost of the gas insulation switch device 100 can be reduced.

According to the gas insulation switch device of embodiment 1, the gas insulation switch device is provided with a plurality of circuit breaker modules and breaker modules; wherein the circuit breaker module comprises: a cylindrical first pressure groove having a first opening at one end in the central axis direction, and the first opening is closed by a cover; and a circuit breaker is arranged in the first pressure groove and opens and closes the main circuit along the central axis direction of the first pressure groove; the breaker module comprises: a cylindrical second pressure groove having a third opening at at least one end in the central axis direction, and the third opening is closed by a cover; and the breaker is arranged in the second pressure groove and opens and closes the main circuit along the central axis direction of the first pressure groove. The second pressure trough interrupts the main circuit along its central axis. The plurality of circuit breaker modules are arranged so that the central axes of the first pressure trough are parallel to each other. The first and second pressure troughs each have at least one second opening on a side surface. Adjacent circuit breaker modules, and adjacent circuit breaker modules and breaker modules are connected at the second openings, and all of the first and second pressure troughs define a closed space. An insulating gas is enclosed in the closed space. Thus, a compact and inexpensive gas-insulated switch device can be provided, which can reduce the installation area even when the enclosed pressure of the insulating medium is increased.

Furthermore, because the plurality of circuit breaker modules include a plurality of busbar conductors extending along a central axis perpendicular to the first pressure groove and passing through the second opening, a gas-insulated switch device with excellent scalability can be provided.

Furthermore, because the plurality of busbar conductors are arranged parallel to each other, a gas-insulated switch device can be provided that can be adapted to various machine configurations simply by arranging and joining the circuit breaker modules.

Furthermore, since the plurality of busbar conductors are supported from below by insulators disposed at the bottom of the first pressure trough, a highly stable gas-insulated switch device can be provided.

Furthermore, since the first and second pressure grooves each have a flange at the second opening, and the flanges are joined to one another, multiple circuit breaker modules and interrupter modules can be securely connected with ease.

Furthermore, because the plurality of circuit breaker modules are arranged with the central axes of the first pressure grooves being parallel to one another, a gas-insulated switch device with high stability in the installed state can be provided.

Furthermore, since the interrupter module is configured with its central axis perpendicular to the central axis of the circuit breaker module, a gas-insulated switch device can be provided that requires a small installation space.

Implementation Type 2.

The following describes the gas-insulated switch device 200 of Embodiment 2, focusing on the differences from Embodiment 1.

Figure 7 is a perspective schematic diagram showing the structure of circuit breaker module 210. Figure 7 is a perspective schematic diagram when circuit breaker module 210 is viewed in the same direction as Figure 2. Figure 7 shows the main circuit closed.

In embodiment 1, the insulators 19 disposed within the pressure trough 11A are arranged along the center axis PA of the pressure trough 11A in FIG2 . Furthermore, the three busbar conductors 5 are horizontally supported from below by the insulators 19 .

In this second embodiment, three insulators 19 are arranged parallel to each other and perpendicular to the ground, inside the curved wall 211L at the deepest point of the pressure groove 211.

Furthermore, the three busbar conductors 5 are supported laterally by insulators 19 and arranged perpendicular to the ground and parallel to one another. Specifically, the busbar conductors 5 extend parallel to one another from the front of the drawing in Figure 7 toward the back. As shown in Figure 7, the three busbar conductors 5 are connected to the three busside conductors 13 via main circuit conductors 217.

In addition to the back surface, the busbar-side conductor 13 also has a connection point on its bottom surface 13U for the main circuit conductor 217 connected to the busbar conductor 5. In Figure 7, two main circuit conductors 217 are connected to the back surface of the busbar-side conductor 13, and one main circuit conductor 217 is connected to the bottom surface 13U of the busbar-side conductor 13.

As shown in Figure 7, the busbar conductor 5 is arranged perpendicular to the ground. This reduces the center-axis dimension of the pressure trough 211 while ensuring the insulation distance between the busbar conductor 5 and the insulator 19. This contributes to a reduction in the dimensions required for the gas-insulated switchgear 200.

According to the gas-insulated switch device of Embodiment 2, since the plurality of busbar conductors are arranged parallel to each other and perpendicular to the ground, the dimension of the pressure trough in the central axis direction can be reduced.

Furthermore, according to the gas-insulated switch device of Embodiment 2, the plurality of busbar conductors are laterally supported by insulators disposed on the wall of the first pressure trough on the opposite side of the first opening in the central axis direction. This ensures an insulation distance while miniaturizing the pressure trough.

Furthermore, according to the gas-insulated switchgear of Embodiment 2, the circuit breaker module comprises: three busbar conductors; three insulating bushings for connecting the circuit breaker to external equipment; and three main circuit conductors for connecting the three busbar-side conductors of the circuit breaker to the busbar conductors, respectively; and at least one of the three main circuit conductors is disposed on the bottom surface of the busbar-side conductor of the circuit breaker. Therefore, the size of the pressure trough can be further reduced.

Implementation Type 3.

The following describes the gas-insulated switch device 300 of Embodiment 3, focusing on the differences from Embodiments 1 and 2.

Figure 8 is a perspective schematic diagram showing the structure of circuit breaker module 310. Figure 8 is a perspective schematic diagram of circuit breaker module 310 viewed in the same direction as Figure 2. Figure 8 shows the main circuit closed.

As shown in Figure 8, compared to the pressure troughs 11 and 211 described in Embodiments 1 and 2, the pressure trough 311 is constructed by placing the busbar conductors 5 on insulators 19 located directly below (or directly below) the busbar-side conductors 13. The bottom surface 13U of the busbar-side conductors 13 and the busbar conductors 5 are connected via main circuit conductors 17. The three busbar conductors 5 are supported from below by the insulators 19 so that they are horizontal and parallel to each other.

As shown in Figure 8, in the circuit configuration of Embodiment 1, the busbar conductor 5 is housed in the space directly below the busbar-side conductor 13, which is not occupied by any other components. This reduces the depth of the pressure trough 311 while ensuring insulation distance between the input/output conductor 18 and the busbar conductor 5, allowing for a further reduction in installation area compared to Embodiment 2. This reduction in the volume of the pressure trough 211 also contributes to a reduction in the amount of insulating medium required to be enclosed.

According to the gas-insulated switchgear of Embodiment 3, the circuit breaker module comprises: three busbar conductors; three insulating bushings for connecting the circuit breaker to external equipment; and three main circuit conductors for connecting the three busbar-side conductors of the circuit breaker to the busbar conductors, respectively. Furthermore, the three main circuit conductors are disposed below the busbar-side conductors of the circuit breaker. The three busbar conductors are arranged parallel and horizontally to one another. Therefore, the pressure tank can be miniaturized and the amount of insulating medium required for sealing can be reduced.

Implementation Type 4.

The following describes the gas-insulated switch device 400 of Embodiment 4, focusing on the differences from Embodiment 3.

Figure 9 is a perspective schematic diagram showing the structure of circuit breaker module 410. Figure 9 is a perspective schematic diagram of circuit breaker module 410 viewed in the same direction as Figure 2. Figure 9 shows the main circuit closed.

As shown in Figure 9, compared to the pressure trough 311 described in Embodiment 3, the pressure trough 411 arranges the busbar conductor 5 located directly below (or below) the busbar-side conductor 13 so that the three conductors form the vertices of a triangle, as shown in the perspective diagram of Figure 9. Specifically, the two outer busbar conductors 5 are arranged horizontally, while the central busbar conductor 5 is positioned below the other two busbar conductors 5. This structure connects the bottom surface 13U of the busbar-side conductor 13 to the busbar conductor 5 via the main circuit conductor 17.

The structure is designed to reduce the diameter of the opening 411K2 on the side of the pressure trough 411 to ensure the insulation distance between the three busbar conductors 5 and the insulation distance between the busbar conductors 5 and the pressure trough 411. Furthermore, while the triangular arrangement of the busbar conductors 5 is shown in the figure, with only the busbar conductor 5 in the center of the central axis P direction positioned vertically downward, a triangular arrangement in which only the busbar conductor 5 in the center of the central axis P direction is positioned vertically upward is also possible.

As shown in Figure 9, by arranging the busbar conductors 5 in a triangular configuration, the diameter of the opening 411K2 of the pressure groove 411 can be further reduced compared to Embodiment 3. This reduces the stress applied to the flange portion of the module connection due to the internal pressure of the circuit breaker module 410 and the interrupter module 30. This reduces the axial force required to connect the flange portion, thereby reducing the number and size of bolts used to secure the modules.

According to the gas-insulated switch device of embodiment 4, the circuit breaker module comprises: three busbar conductors; three insulating bushings for connecting the circuit breaker to an external device; and three main circuit conductors for connecting the three busbar-side conductors of the circuit breaker to the busbar conductors, respectively; and the three main circuit conductors are disposed on the busbar-side conductors of the circuit breaker. The three busbar conductors are parallel to each other, and the two outer busbar conductors are arranged horizontally. The central busbar conductor is positioned above or below the other two busbar conductors. Therefore, the diameter of the opening of the pressure trough can be reduced, thereby reducing the number of components and lowering the manufacturing cost of the gas-insulated switch device.

Although this disclosure describes various exemplary embodiments and examples, the various features, aspects, and functions described in one or more embodiments are not limited to application in a specific embodiment and may be applied to the embodiments individually or in various combinations.

Therefore, countless variations not shown in the examples are also within the technical scope disclosed in this specification. For example, this includes situations where at least one component is changed, added, or omitted, or even situations where at least one component is removed and combined with components from other embodiments.

82: Cover

10, 10A, 10B, 10C: Circuit breaker module

11, 11A, 11B, 11C, 11D: Pressure grooves

11F, 11AF, 11BF, 11CF, 11DF: Flange

11K2, 11BK2, 11CK2, 11DK2: Flange opening

11DK: Opening

20, 20A, 20B, 20C: Circuit breaker

30: Breaker module

31: Busbar connecting conductor

40: Shutoff

100: Gas insulation switch device

100R: Enclosed Space

PA, PB, PC, PD: Center axis

Claims (11)

A gas-insulated switchgear comprises a plurality of circuit breaker modules and interrupter modules; wherein: At least one of the plurality of circuit breaker modules comprises: a cylindrical first pressure tank having a first opening at one end in the central axis direction, the first opening being sealed by a cover; and a circuit breaker disposed in the first pressure tank and opening and closing a main circuit along the central axis direction of the first pressure tank; The circuit breaker module comprises: a cylindrical second pressure trough having a third opening at at least one end in the central axis direction, the third opening being sealed by a cover; and a circuit breaker disposed within the second pressure trough and configured to interrupt the main circuit along the central axis of the second pressure trough. A plurality of the circuit breaker modules are arranged with the central axes of the first pressure trough parallel to one another; The first and second pressure troughs each have a second opening on a side surface; Adjacent circuit breaker modules, and adjacent circuit breaker modules and circuit breaker modules, are connected at the second openings, and a closed space is formed by all of the first and second pressure troughs. An insulating gas is enclosed in the enclosed space. The plurality of circuit breaker modules are arranged such that the central axes of the first pressure grooves are parallel to each other. The gas-insulated switch device of claim 1, wherein the breaker module is configured such that a central axis thereof is perpendicular to a central axis of at least one of the plurality of breaker modules. The gas-insulated switch device as described in claim 1, wherein the plurality of the aforementioned circuit breaker modules are provided with: a plurality of busbar conductors extending along a central axis perpendicular to the aforementioned first pressure groove and passing through the aforementioned second opening portion. A gas-insulated switch device as described in claim 3, wherein the plurality of busbar conductors are arranged parallel to and horizontally with each other. A gas-insulated switch device as described in claim 3, wherein a plurality of the aforementioned busbar conductors are arranged parallel to each other and perpendicular to the ground. The gas-insulated switch device of claim 4, wherein the plurality of busbar conductors are supported from below by insulators disposed at the bottom of the first pressure groove. The gas-insulated switch device as described in claim 5, wherein the plurality of busbar conductors are supported from the side by insulators arranged on the wall of the first pressure groove on the opposite side of the first opening in the central axis direction. The gas-insulated switchgear of claim 3, wherein at least one of the plurality of circuit breaker modules comprises: Three busbar conductors as the plurality of busbar conductors; Three insulating bushings for connecting the circuit breaker to an external device; and Three main circuit conductors for connecting three busbar-side conductors of the circuit breaker to the three busbar conductors, respectively; At least one of the three main circuit conductors is disposed on the bottom surface of one of the three busbar-side conductors of the circuit breaker. The gas-insulated switchgear of claim 3, wherein at least one of the plurality of circuit breaker modules comprises: Three busbar conductors as the plurality of busbar conductors; Three insulating bushings for connecting the circuit breaker to an external device; and Three main circuit conductors for connecting three busbar-side conductors of the circuit breaker to the three busbar conductors, respectively; The three main circuit conductors are disposed below the three busbar-side conductors of the circuit breaker, respectively; The three busbar conductors are disposed parallel to and horizontally with respect to each other. The gas-insulated switchgear of claim 3, wherein at least one of the plurality of circuit breaker modules comprises: three busbar conductors as the plurality of busbar conductors; three insulating bushings for connecting the circuit breaker to an external device; and three main circuit conductors for connecting the three busbar-side conductors of the circuit breaker to the three busbar conductors, respectively; and the three main circuit conductors are disposed below the three busbar-side conductors of the circuit breaker, respectively; the three busbar conductors are parallel to each other, and the two busbar conductors disposed on the outer sides are disposed horizontally with respect to each other; the central busbar conductor is disposed above or below the other two busbar conductors. The gas-insulating switch device according to any one of claims 1 to 10, wherein the first pressure groove and the second pressure groove each have a flange portion at the second opening, and the flange portions are joined to each other.