Busbar connection devices and gas-insulated switchgear

Abstract

To provide a busbar connection device and a gas-insulated switchgear that facilitate adjustment in the connection between busbars. [Solution] The device comprises a plug conductor (4) on the busbar (11A) side, a socket conductor (5) on the busbar (11B) side, and a socket plug conductor (6) between the plug conductor (4) and the socket conductor (5). The third connection part (6A) of the socket plug conductor (6) is connected to the first connection part (4A) of the plug conductor (4) or the fourth connection part (6B) of the socket plug conductor (6), and the fourth connection part (6B) is connected to the second connection part (5A) of the socket conductor (5) or the third connection part (6A) of the socket plug conductor (6). The device is connected to each other, and one of the connection parts of the first connection part (4A), second connection part (5A), third connection part (6A), and fourth connection part (6B) is provided with elastic contacts (31, 32) that electrically connect the two connection parts.

Description

Technical Field

[0001] The present disclosure relates to a bus connection device and a gas-insulated switchgear.

Background Art

[0002] Generally, a gas-insulated switchgear is composed of a plurality of gas-insulated switchgears with different roles, and each gas-insulated switchgear is electrically connected by a bus connection device via some conductor. For example, on the side surface of the gas-insulated switchgear, as a bus connection device, a bushing having a cup-shaped socket conductor and a bushing having a rod-shaped socket conductor are arranged to face each other, and there is a structure in which they are fitted via a contact (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the configuration shown in the conventional bus connection device, since the contact interposed between the buses is installed only between a pair of conductors, the relative positional relationship of the connected buses is affected by the cumulative tolerance due to the dimensional tolerance in the manufacture of each component and the dimensional tolerance during assembly. For example, when the allowable range of the dimensions that can be engaged by the contact in the vertical, horizontal, and front-back directions with respect to the paper surface of FIG. 5 in Patent Document 1 is exceeded, it is necessary to adjust the position of the conductor. When the conductor or the bushing does not have an adjustment structure, there is a problem that it is necessary to change the position of the gas-insulated switchgear itself to adjust the positional relationship of the buses within a connectable range.

[0005] The present disclosure discloses a technique for solving the above problems, The objective is to provide a busbar connection device and a gas-insulated switchgear that facilitate adjustments in the connection between busbars. [Means for solving the problem]

[0006] The bus connection device of this disclosure is A busbar connection device that connects two busbars that pass through each container and are facing each other on the same axis, One of the plug conductors is attached to the end of the busbar and has a male-shaped first connecting portion and is conductive, Attached to the other end of the busbar, a conductive socket conductor having a female-shaped second connection portion, The system comprises at least one conductive socket plug conductor interposed between the plug conductor and the socket conductor to allow electrical conduction between the plug conductor and the socket conductor, The socket plug conductor has a third connecting portion at one end in the axial direction and a fourth connecting portion at the other end in the axial direction. The third connection is connected to the first connection of the plug conductor or the fourth connection of the socket plug conductor, The fourth connection is connected to the second connection of the socket conductor or the third connection of the socket plug conductor, The device includes an elastic contact that electrically connects two of the interconnected first, second, third, and fourth connectors. It is. Furthermore, the gas-insulated switchgear of this disclosure is The aforementioned container is a pressure vessel filled with gas. Using the busbar connection device described above It is. [Effects of the Invention]

[0007] According to the busbar connection device and gas-insulated switchgear of this disclosure, This makes it easier to adjust the connections between busbars. [Brief explanation of the drawing]

[0008] [Figure 1] It is a front sectional view showing the configuration of a gas-insulated switchgear using the bus connection device according to Embodiment 1. [Figure 2] It is a top sectional view showing the configuration of the gas-insulated switchgear shown in FIG. 1. [Figure 3] It is a partial top view showing the configuration of the gas-insulated switchgear shown in FIG. 1. [Figure 4] It is a sectional view showing the configuration of the X-X line cross section of the gas-insulated switchgear shown in FIG. 3. [Figure 5] It is a sectional view showing the assembly process in the X-X line cross section of the gas-insulated switchgear shown in FIG. 3. [Figure 6] It is a sectional view showing the assembly process in the X-X line cross section of the gas-insulated switchgear shown in FIG. 3. [Figure 7] It is a sectional view showing the configuration of the socket conductor of the bus connection device shown in FIG. 1. [Figure 8] It is a sectional view showing the configuration of the plug conductor of the bus connection device shown in FIG. 1. [Figure 9] It is a sectional view showing the configuration of the socket plug conductor of the bus connection device shown in FIG. 1. [Figure 10] It is a top view showing the configuration of a gas-insulated switchgear using the bus connection device according to Embodiment 2. [Figure 11] It is a sectional view showing the configuration of the Y-Y line cross section of the gas-insulated switchgear shown in FIG. 10. [Figure 12] It is a sectional view showing the corresponding configuration to the Y-Y line cross section of FIG. 10 of the gas-insulated switchgear according to Embodiment 3. [Figure 13] It is a sectional view showing another corresponding configuration to the Y-Y line cross section of FIG. 10 of the gas-insulated switchgear according to Embodiment 4.

Embodiments for Carrying Out the Invention

[0009] Embodiment 1. FIG. 1 is a front cross-sectional view showing the configuration of a gas-insulated switchgear using the bus connection device according to Embodiment 1. FIG. 2 is a top cross-sectional view showing the configuration of the gas-insulated switchgear shown in FIG. 1. FIG. 3 is a partial top view showing the configuration of the gas-insulated switchgear shown in FIG. 1. FIG. 4 is a cross-sectional view showing the configuration of the X-X line cross-section of the gas-insulated switchgear shown in FIG. 3. FIG. 5 is a cross-sectional view showing the assembly process in the X-X line cross-section of the gas-insulated switchgear shown in FIG. 3. FIG. 6 is a cross-sectional view showing the assembly process in the X-X line cross-section of the gas-insulated switchgear shown in FIG. 3. FIG. 7 is a cross-sectional view showing the configuration of the socket conductor of the bus connection device shown in FIG. 1. FIG. 8 is a cross-sectional view showing the configuration of the plug conductor of the bus connection device shown in FIG. 1. FIG. 9 is a cross-sectional view showing the configuration of the socket plug conductor of the bus connection device shown in FIG. 1.

[0010] As shown in FIGS. 1 to 3, the gas-insulated switchgear 200 includes two coaxial and opposing busbars 11A and 11B that penetrate through pressure vessels 1A and 1B as containers, respectively, and here three pairs of them are provided. Hereinafter, the axial direction of the coaxial axis is illustrated and described as the Z direction. And bus connection devices 101 for electrically connecting between the respective busbars 11A and 11B are installed respectively. The bus connection device 101 has bushings 2A and 2B for insulating the respective pressure vessels 1A and 1B from the respective busbars 11A and 11B.

[0011] As shown in FIG. 4, the bus connection device 101 includes bushings 2A and 2B, a plug conductor 4, a socket conductor 5, a socket plug conductor 6, and an adapter 7. The bushings 2A and 2B include protruding portions 12A and 12B that protrude from the opposing sides in the Z direction from the respective pressure vessels 1A and 1B. And the respective busbars 11A and 11B are arranged such that their tips are exposed from the protruding portions 12A and 12B.

[0012] As shown in Figures 4 and 7, the plug conductor 4 has a through hole 4B that penetrates in the Z direction. The plug conductor 4 is fixed to the end of one busbar 11A by installing a screw 91 in the through hole 4B. The plug conductor 4 has a male-shaped first connection portion 4A and is conductive. Furthermore, a groove portion 4C is formed on the outer circumference of the first connection portion 4A of the plug conductor 4.

[0013] As shown in Figures 4 and 8, the socket conductor 5 has a through hole 5B that penetrates in the Z direction. The socket conductor 5 is fixed to the end of the other busbar 11B by installing a screw 92 in the through hole 5B. The socket conductor 5 also has a female-shaped second connector 5A and is electrically conductive.

[0014] As shown in Figures 4 and 9, the socket plug conductor 6 is interposed between the plug conductor 4 and the socket conductor 5 in the Z direction. The socket plug conductor 6 has conductivity that allows electrical conduction between the plug conductor 4 and the socket conductor 5. In this embodiment 1, one socket plug conductor 6 is installed. The socket plug conductor 6 has a third connection part 6A at one end in the Z direction and a fourth connection part 6B at the other end in the Z direction. The third connection part 6A of the socket plug conductor 6 is connected to the first connection part 4A of the plug conductor 4. The fourth connection part 6B of the socket plug conductor 6 is connected to the second connection part 5A of the socket conductor 5. A groove part 6C is formed on the outer circumference of the fourth connection part 6B of the socket plug conductor 6.

[0015] The first connection portion 4A of the plug conductor 4 and the fourth connection portion 6B of the socket plug conductor 6 are formed in a convex shape that protrudes toward the second connection portion 5A of the socket conductor 5. In addition, the second connection portion 5A of the socket conductor 5 and the third connection portion 6A of the socket plug conductor 6 are formed in a concave shape that can connect to the convex shape described above.

[0016] Furthermore, at one of the connection points between the first connection point 4A of the plug conductor 4 and the third connection point 6A of the socket plug conductor 6, an elastic contact 31 for electrically connecting the first connection point 4A of the plug conductor 4 and the third connection point 6A of the socket plug conductor 6 is installed in a groove 4C formed in the first connection point 4A of the plug conductor 4.

[0017] Furthermore, as one of the connection points between the first connection portion 4A of the plug conductor 4 and the third connection portion 6A of the socket plug conductor 6, it is also possible to install an elastic contact on the third connection portion 6A of the socket plug conductor 6 for electrically connecting the first connection portion 4A of the plug conductor 4 and the third connection portion 6A of the socket plug conductor 6, in the opposite case to the one shown above. In that case, a groove for installing the contact is formed on the third connection portion 6A of the socket plug conductor 6. This point is also the same in the following embodiments, so its explanation will be omitted as appropriate.

[0018] Furthermore, at one of the interconnected connections between the second connection portion 5A of the socket conductor 5 and the fourth connection portion 6B of the socket plug conductor 6, in this case the fourth connection portion 6B of the socket plug conductor 6, an elastic contact 32 for electrically connecting the second connection portion 5A of the socket conductor 5 and the fourth connection portion 6B of the socket plug conductor 6 is installed in a groove 6C formed in the fourth connection portion 6B of the socket plug conductor 6.

[0019] Furthermore, as one of the connection points between the second connection portion 5A of the socket conductor 5 and the fourth connection portion 6B of the socket plug conductor 6, it is also possible to install an elastic contact on the second connection portion 5A of the socket conductor 5 for electrically connecting the second connection portion 5A of the socket conductor 5 and the fourth connection portion 6B of the socket plug conductor 6, in the opposite case to the one shown above. In that case, a groove for installing the contact is formed on the second connection portion 5A of the socket conductor 5. This point is also the same in the following embodiments, so its explanation will be omitted as appropriate.

[0020] The contacts 31 and 32 are composed of, for example, elastic coil springs or leaf springs, and can absorb misalignment of the relative positions of the connected parts within their elastic range. The adapter 7 is formed to cover the outer circumference of the plug conductor 4, socket conductor 5, and socket plug conductor 6, and is insulating, and is made of, for example, elastic silicone rubber.

[0021] As shown in Figure 5, the busbar connection device 101 of Embodiment 1, configured as described above, has bushings 2A and 2B installed so that the ends of the busbars 11A and 11B of the pressure vessels 1A and 1B are exposed from the protruding parts 12A and 12B. Then, as shown in Figure 6, the plug conductor 4 is fixed to one busbar 11A with a screw 91 through the through hole 4B. The socket conductor 5 is fixed to the other busbar 11B with a screw 92 through the through hole 5B. Then, as shown in Figure 4, the third connection part 6A of the socket plug conductor 6 is fitted and connected to the first connection part 4A of the plug conductor 4, and the fourth connection part 6B of the socket plug conductor 6 is fitted and connected to the second connection part 5A of the socket conductor 5.

[0022] As a result, the first connection part 4A of the plug conductor 4 and the third connection part 6A of the socket plug conductor 6 are electrically connected by the contact 31, and the second connection part 5A of the socket conductor 5 and the fourth connection part 6B of the socket plug conductor 6 are electrically connected by the contact 32, ensuring conductivity from the busbar 11A of the bushing 2A to the busbar 11B of the bushing 2B, and enabling the transfer of power between the pressure vessels 1A and 1B of the connected gas-insulated switchgear 200.

[0023] In contrast to conventional designs where there is only one contact point and only one contact point's misalignment is acceptable, the present disclosure, with the presence of the socket plug conductor 6, has two contact points, 31 and 32. This allows for the absorption of positional misalignment equal to the number of contact points 31 and 32, reducing the effort required to adjust the positional relationship of the connected objects.

[0024] In the above embodiment 1, an example was shown in which one socket plug conductor 6 is installed between the plug conductor 4 and the socket conductor 5 in the Z direction. However, this is not limited to this, and it is also conceivable that two or more socket plug conductors 6 are installed. In that case, in addition to the installation locations between the first connection part 4A of the plug conductor 4 and the third connection part 6A of the socket plug conductor 6, and between the second connection part 5A of the socket conductor 5 and the fourth connection part 6B of the socket plug conductor 6, an additional contact can be installed between the fourth connection part 6B of the socket plug conductor 6 and the third connection part 6A of the other socket plug conductor 6. This increases the number of installation locations for contacts and further reduces the effort required to adjust the positional relationship of the objects to be connected by absorbing misalignment.

[0025] According to the busbar connection device of Embodiment 1 configured as described above, A busbar connection device that connects two busbars that pass through each container and are facing each other on the same axis, One of the plug conductors is attached to the end of the busbar and has a male-shaped first connecting portion and is conductive, Attached to the other end of the busbar, a conductive socket conductor having a female-shaped second connection portion, The system comprises at least one conductive socket plug conductor interposed between the plug conductor and the socket conductor to allow electrical conduction between the plug conductor and the socket conductor, The socket plug conductor has a third connecting portion at one end in the axial direction and a fourth connecting portion at the other end in the axial direction. The third connection is connected to the first connection of the plug conductor or the fourth connection of the socket plug conductor, The fourth connection is connected to the second connection of the socket conductor or the third connection of the socket plug conductor, The device includes an elastic contact that electrically connects two of the interconnected first, second, third, and fourth connectors. Therefore, Since elastic contacts are provided between the first, second, third, and fourth connecting parts, which are interconnected, Since the number of adjustment points using contacts increases, a busbar connection device can be obtained that makes it easier to adjust the connections between busbars. In this way, simply by increasing the number of contacts, the allowable dimensions of the contacts that can engage are increased, making it possible to obtain a busbar connection device in which the relative positions of the connected components can be easily and simply adjusted.

[0026] Furthermore, according to the bus connection device of Embodiment 1 configured as described above, The first and fourth connecting portions are formed in a convex shape that protrudes toward the second connecting portion. The second and third connecting portions are formed with a concave shape that can connect to the convex shape. Therefore, A busbar connector can be obtained that ensures a secure fit between the convex shape and the concave shape that can be joined to the convex shape, preventing separation due to external force and reliably maintaining an electrical connection.

[0027] Furthermore, according to the bus connection device of Embodiment 1 configured as described above, The contact is installed in a groove formed in one of the connection portions. Therefore, A busbar connection device can be obtained that can reliably install the contactor at the appropriate location.

[0028] Furthermore, according to the bus connection device of Embodiment 1 configured as described above, The plug conductor and the socket conductor are installed in different containers, respectively, via bushings that insulate the busbar and the container. The outer circumferences of the plug conductor, the socket conductor, and the socket plug conductor are covered with an insulating adapter. Therefore, A busbar connection device can be obtained that can prevent leakage current from the socket conductor, plug conductor, and socket-plug conductor, and that enables the connection of busbars between different containers.

[0029] Furthermore, according to the gas-insulated switchgear of Embodiment 1 configured as described above, The aforementioned container is a pressure vessel filled with gas. Using the busbar connection device described above Therefore, This allows for easy connection of the busbars of gas-insulated switchgear. Furthermore, even if the axial positional relationship of the connection points changes due to the structure of the gas-insulated switchgear, the relative distance can be easily changed by increasing or decreasing the number of socket plug conductors placed in between.

[0030] Embodiment 2. In Embodiment 1 described above, the connection of busbars led out from different pressure vessels was explained. In Embodiment 2, an example of a gas-insulated switchgear using a busbar connection device that connects busbars within a single pressure vessel will be described.

[0031] Figure 10 is a top view showing the configuration of a gas-insulated switchgear using a busbar connection device according to Embodiment 2. Figure 11 is a cross-sectional view showing the configuration of the YY line cross-section of the gas-insulated switchgear shown in Figure 10.

[0032] In the figure, parts the same as those in Embodiment 1 are denoted by the same reference numerals and their descriptions are omitted. As shown in the figure, in Embodiment 2, the gas-insulated switchgear 201 is equipped with two coaxially opposed busbars 11A and 11B, in this case three pairs, which are introduced into the pressure vessel 1C as the container. The electrical connection part (high voltage part) of the busbar connection device 102 is housed inside the pressure vessel 1C. Therefore, the adapter 7 shown in Embodiment 1 is not required.

[0033] The busbar connection device 102 comprises partition spacers 8A and 8B, a plug conductor 41, a socket conductor 51, and a socket plug conductor 6. The partition spacers 8A and 8B are for introducing busbars 11A and 11B into the pressure vessel 1C from opposing sides in the Z direction of the pressure vessel 1C while providing insulation. A plug conductor 41 is installed at the end of one busbar 11A, and a socket conductor 51 is installed at the end of the other busbar 11B.

[0034] In this embodiment, four socket plug conductors 6 are arranged in the Z direction between the plug conductor 41 and the socket conductor 51. The first connection portion 4A and groove portion 4C of the plug conductor 41, and the second connection portion 5A of the socket conductor 51 are formed in the same manner as in Embodiment 1 described above. Furthermore, adjacent socket plug conductors 6 in the Z direction are connected by the fitting of the fourth connection portion 6B of one socket plug conductor 6 with the third connection portion 6A of the other socket plug conductor 6.

[0035] Furthermore, similar to Embodiment 1 described above, there are contacts 31 that electrically connect the first connection portion 4A of the plug conductor 41 to the third connection portion 6A of the socket plug conductor 6, and contacts 32 that electrically connect the second connection portion 5A of the socket conductor 51 to the fourth connection portion 6B of the socket plug conductor 6. In addition, there is a contact 32 that electrically connects the fourth connection portion 6B of the socket plug conductor 6 to the third connection portion 6A of the socket plug conductor 6 adjacent in the Z direction.

[0036] In this embodiment 2, an example was shown in which four socket plug conductors 6 are installed between the plug conductor 41 and the socket conductor 51 in the Z direction. However, the number is not limited to this, and can be increased or decreased according to the relative distance between the partition spacers 8A and 8B.

[0037] In this second embodiment, the high-voltage conductors (plug conductor 41, socket conductor 51, socket plug conductor 6) are housed in a pressure vessel 1C filled with an insulating gas (e.g., SF6 gas), so there is no need to cover them with an adapter 7 as in the first embodiment. Since the pressure vessel 1C is mainly formed by sheet metal welding, even if it is necessary to change the distance between partition spacers 8A and 8B to several variations, it is relatively easy to manufacture a pressure vessel 1C corresponding to that distance, and the dimensions of the conductor portion can be easily adjusted by increasing or decreasing the number of socket plug conductors 6.

[0038] By changing the dimensions of the pressure vessel 1C and the number of socket plug conductors 6, various distances between compartment spacers 8A and 8B can be accommodated without increasing the number of component types. Furthermore, since the plug conductor 41, socket conductor 51, and socket plug conductor 6 are interlocked and connected, they cannot be separated by external force once the connection is complete, eliminating the need to provide a separate retaining part to hold the position of the socket plug conductor 6.

[0039] According to the gas-insulated switchgear of Embodiment 2 configured as described above, the same effects as those of Embodiment 1 are achieved, The plug conductor and the socket conductor are installed within the same container, with spacers insulating the busbar from the container. Therefore, A busbar connection device can be obtained that enables the connection of busbars within a single container.

[0040] Embodiment 3. In each of the embodiments described above, an example was shown in which a contact is provided at one location between the interconnected first connection part, second connection part, third connection part, and fourth connection part. However, the invention is not limited to this, and a case in which contacts are provided at multiple locations between the interconnected first connection part, second connection part, third connection part, and fourth connection part will be described. Figure 12 is a cross-sectional view showing the configuration of the gas-insulated switchgear according to Embodiment 3, corresponding to the YY line cross-section in Figure 10.

[0041] In the figures, parts similar to those in the above embodiments are denoted by the same reference numerals and their descriptions are omitted. As shown in the figures, three elastic contacts 330 are installed at locations for electrical connection between the first connection portion 4A of the plug conductor 4 and the third connection portion 6A of the socket plug conductor 6, which are interconnected. The first connection portion 4A of the plug conductor 4 has grooves formed at positions corresponding to the contacts 330 for installing the contacts 330.

[0042] Furthermore, three elastic contacts 320 for electrical connection are provided between the second connection portion 5A of the socket conductor 5 and the fourth connection portion 6B of the socket plug conductor 6, and between the fourth connection portion 6B of the socket plug conductor 6 and the third connection portion 6A of the socket plug conductor 6 adjacent in the Z direction. The fourth connection portion 6B of the socket plug conductor 6 has grooves formed in it at positions corresponding to the contacts 320 for installing the contacts 320.

[0043] Of the three locations on each contact 330 and 320, the two locations enclosed by the dotted line H are installed in the circumferential direction of the plug conductor 41 or socket plug conductor 6, and the one location enclosed by the dotted line J is installed at the axial end of the plug conductor 41 or socket plug conductor 6.

[0044] Increasing the number of contacts between each interconnected connection increases the number of electrical connection points, thus suppressing the increase in contact resistance. Furthermore, since electrical connections can be obtained even in parts that were not originally part of the current path, the increase in contact resistance can be further suppressed. In addition, the electrical resistance between partition spacers 8A and 8B can be relatively reduced, making it possible to carry more current than in the above embodiments. Moreover, since the increase in contact resistance is suppressed, heat generation during current flow can be suppressed.

[0045] Furthermore, the busbar connection device of Embodiment 3 configured as described above provides the same effects as the embodiments described above, The device comprises a plurality of elastic contacts that electrically connect two interconnected connectors to one of the two interconnected connectors among the first, second, third, and fourth connectors. Therefore, This allows for the creation of a busbar connection device that ensures reliable electrical connection of contacts and suppresses contact resistance.

[0046] Embodiment 4. Figure 13 is a cross-sectional view showing another configuration of the gas-insulated switchgear according to Embodiment 4, corresponding to the YY line cross-section in Figure 10.

[0047] In the figures, parts similar to those in the above embodiments are denoted by the same reference numerals and their descriptions are omitted. This fourth embodiment describes the case in which a busbar 11C on a different axis from the coaxial busbars 11A and 11B in the Z direction is added and connected by a busbar connection device 103. In this fourth embodiment, the busbar 11C is located in the upper vertical direction in the Z direction. This busbar 11C is installed in the pressure vessel 1C via a partition spacer 8C. To connect to this busbar 11C, a socket plug conductor 61 having a male-shaped fifth connection part 6D in the upper vertical direction in the Z direction is provided.

[0048] A socket conductor 51 having a female-shaped second connector 5A is installed on the busbar 11C. Therefore, the second connector 5A of the socket conductor 51 and the fifth connector 6D of the socket plug conductor 61 are fitted together and connected. An elastic contact 38 for electrically connecting the second connector 5A of the socket conductor 51 and the fifth connector 6D of the socket plug conductor 61 is installed in a groove formed in the fifth connector 6D of the socket plug conductor 61. By providing the socket plug conductor 61 having a fifth connector 6D that branches off perpendicularly in the middle of the Z direction, the partition spacers 8A, 8B, and 8C can be arranged in two perpendicular directions.

[0049] Although this example shows the busbar 11C branching vertically upward, the socket plug conductor 61 can be rotated around the Z-axis for use. Therefore, regardless of whether the busbar is positioned horizontally or vertically downward, the socket plug conductor 61 can be rotated to connect to the fifth connection part 6D at each respective position.

[0050] Although an example has been shown in which the fifth connection portion 6D of the socket plug conductor 61 is formed in a male shape, this is not the only option, and it is also conceivable that the fifth connection portion be formed in a female shape. In that case, connection can be made by installing the plug conductor 41 on the busbar 11C.

[0051] The presence of partition spacers 8A, 8B, and 8C in two directions approximately perpendicular to the busbar connection device 102 makes it possible to connect busbars from a gas-insulated switchgear, for example, which has the busbar connection device 102 positioned on a relatively small-height pressure vessel 1C containing only an EVT (Earthed Voltage Transformer), to adjacent gas-insulated switchgear in both directions. This allows for a highly flexible arrangement without increasing the external dimensions of the gas-insulated switchgear.

[0052] The gas-insulated switchgear of Embodiment 4, configured as described above, provides the same effects as the above embodiments, The socket plug conductor is provided with a fifth connection portion that connects to another busbar having a different axis from the aforementioned axis. Therefore, A busbar connection device can be obtained for connecting busbars of other axes.

[0053] While this disclosure describes various exemplary embodiments and examples, the various features, aspects, and functions described in one or more embodiments are not limited to the application of a particular embodiment, but are applicable individually or in various combinations to the embodiments. Accordingly, countless variations not illustrated are conceivable within the scope of the art disclosed in this specification. These include, for example, modifying, adding or omitting at least one component, or even extracting at least one component and combining it with components of other embodiments.

[0054] The various aspects of this disclosure are summarized below as an appendix.

[0055] (Note 1) A busbar connection device that connects two busbars that pass through each container and are facing each other on the same axis, One of the plug conductors is attached to the end of the busbar and has a male-shaped first connecting portion and is conductive, Attached to the other end of the busbar, a conductive socket conductor having a female-shaped second connection portion, The system comprises at least one conductive socket plug conductor interposed between the plug conductor and the socket conductor to allow electrical conduction between the plug conductor and the socket conductor, The socket plug conductor has a third connecting portion at one end in the axial direction and a fourth connecting portion at the other end in the axial direction. The third connection is connected to the first connection of the plug conductor or the fourth connection of the socket plug conductor, The fourth connection is connected to the second connection of the socket conductor or the third connection of the socket plug conductor, A busbar connection device comprising an elastic contact that electrically connects two of the interconnected first, second, third, and fourth interconnections to one of the interconnections. (Note 2) The busbar connection device according to Appendix 1, comprising a plurality of elastic contacts that electrically connect two of the interconnected first, second, third, and fourth interconnections to one of the interconnections. (Note 3) The first and fourth connecting portions are formed in a convex shape that protrudes toward the second connecting portion. The busbar connection device according to Appendix 1 or Appendix 2, wherein the second connection portion and the third connection portion are formed in a concave shape that can connect to the convex shape. (Note 4) The contactor is installed in a groove formed in one of the connection portions, and is part of the busbar connection device according to any one of the appendices 1 to 3. (Note 5) The busbar connection device according to any one of the appendices 1 to 4, wherein the socket plug conductor is further provided with a fifth connection portion for connecting to another busbar having a different axis from the aforementioned axis. (Note 6) The plug conductor and the socket conductor are installed in different containers, respectively, via bushings that insulate the busbar and the container. The busbar connection device according to any one of the appendices 1 to 5, wherein the outer circumference of the plug conductor, the socket conductor, and the socket plug conductor is covered with an insulating adapter. (Note 7) A busbar connection device according to any one of Appendix 1 to Appendix 5, wherein the plug conductor and the socket conductor are respectively installed in the same container, with spacers that insulate the busbar from the container. (Note 8) The aforementioned container is a pressure vessel filled with gas. A gas-insulated switchgear using a busbar connection device as described in any one of the items from Appendix 1 to Appendix 7. [Explanation of Symbols]

[0056] 1A Pressure vessel, 1B Pressure vessel, 1C Pressure vessel, 101 Busbar connection device, 102 Busbar connection device, 103 Busbar connection device, 11A busbar, 11B busbar, 11C busbar, 12A protrusion, 12B protrusion, 2A bushing, 2B bushing, 200 gas-insulated switchgear, 201 gas-insulated switchgear, 31 contacts, 32 contacts, 320 contacts, 38 contacts, 4 plug conductors, 41 Plug conductor, 4A First connection part, 4B Through hole, 4C Groove, 5 Socket conductor, 51 Socket conductor, 5A Second connector, 5B Through hole, 6 Socket plug conductor, 61 Socket plug conductor, 6A Third connector, 6B Fourth connector, 6C Groove, 6D Fifth connector, 7 Adapter, 8A Partition spacer, 8B Partition spacer, 8C partition spacer, 91 screw, 92 screw.

Claims

1. A busbar connection device that connects two busbars that pass through each container and are facing each other on the same axis, One of the plug conductors is attached to the end of the busbar and has a male-shaped first connecting portion and is conductive, Attached to the other end of the busbar, a conductive socket conductor having a female-shaped second connection portion, The system comprises at least one conductive socket plug conductor interposed between the plug conductor and the socket conductor to allow electrical conduction between the plug conductor and the socket conductor, The socket plug conductor has a third connecting portion at one end in the axial direction and a fourth connecting portion at the other end in the axial direction. The third connection is connected to the first connection of the plug conductor or the fourth connection of the socket plug conductor, The fourth connection is connected to the second connection of the socket conductor or the third connection of the socket plug conductor, A busbar connection device comprising an elastic contact that electrically connects two of the interconnected first, second, third, and fourth interconnections to one of the interconnections.

2. The busbar connection device according to claim 1, further comprising a plurality of elastic contacts that electrically connect the two interconnected connections to one of the two interconnected connections among the first, second, third, and fourth interconnected connections.

3. The first and fourth connecting portions are formed in a convex shape that protrudes toward the second connecting portion. The busbar connection device according to claim 1 or claim 2, wherein the second connection portion and the third connection portion are formed in a concave shape that can connect to the convex shape.

4. The busbar connection device according to claim 1 or claim 2, wherein the contactor is installed in a groove formed in one of the connection portions.

5. The busbar connection device according to claim 1 or claim 2, wherein the socket plug conductor is further provided with a fifth connection portion for connecting to another busbar having an axis different from the axis.

6. The plug conductor and the socket conductor are installed in different containers, respectively, via bushings that insulate the busbar and the container. The busbar connection device according to claim 1 or claim 2, wherein the outer circumference of the plug conductor, the socket conductor, and the socket plug conductor is covered with an insulating adapter.

7. The busbar connection device according to claim 1 or claim 2, wherein the plug conductor and the socket conductor are respectively installed in the same container, with spacers that insulate the busbar and the container.

8. The aforementioned container is a pressure vessel filled with gas. A gas-insulated switchgear using the busbar connection device described in claim 1 or claim 2.

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