Bulk disconnecting switch

Abstract

The present application relates to a high-capacity isolating switch, comprising a first isolating switch, a second isolating switch and a connecting terminal, the incoming line end of the first isolating switch and the incoming line end of the second isolating switch are connected in parallel through the connecting terminal, the outgoing line end of the first isolating switch and the outgoing line end of the second isolating switch are also connected in parallel through the connecting terminal, the connecting terminal comprises at least two clamping lugs arranged at intervals, the clamping lugs are in flat sheet structure, and the clamping lugs are electrically connected to external conductive copper bars through clamping and fixing of adjacent two clamping lugs. The present application can improve the current capacity of the isolating switch, reduce the temperature rise of the isolating switch, avoid high temperature rise of the product, and further improve the capacity of the isolating switch.

Description

Technical Field

[0001] This invention relates to the field of switchgear, and more specifically to a high-capacity disconnect switch. Background Technology

[0002] In today's society where electricity consumption is constantly increasing, the capacity of disconnect switches, as important switching devices in power distribution systems, is receiving increasing attention from the industry. Generally speaking, while the current carrying capacity of disconnect switches increases, the temperature rise of the conductive copper busbar also increases. Existing high-capacity disconnect switches often cannot effectively solve the temperature rise problem of the conductive copper busbar, thus limiting the current capacity and preventing further increases. Summary of the Invention

[0003] Therefore, in order to address the above problems, this invention proposes a structurally optimized high-capacity disconnect switch.

[0004] This invention is achieved using the following technical solution:

[0005] This invention proposes a high-capacity disconnect switch, characterized in that it includes a first disconnect switch, a second disconnect switch, and a connecting terminal. The input terminals of the first and second disconnect switches are connected in parallel through the connecting terminal, and the output terminals of the first and second disconnect switches are also connected in parallel through the connecting terminal. The connecting terminal includes at least two clamping terminals arranged at intervals. The clamping terminals have a flat plate structure and are fixed by the clamping of two adjacent clamping terminals to electrically connect to an external conductive copper busbar.

[0006] Both the first disconnecting switch and the second disconnecting switch further include an incoming stationary contact and an outgoing stationary contact. In order to further reduce the temperature rise, the high-capacity disconnecting switch preferably also includes a transition copper busbar. The incoming terminals of the first disconnecting switch and the second disconnecting switch are electrically connected to the incoming stationary contact through the transition copper busbar, and the outgoing terminals of the first disconnecting switch and the second disconnecting switch are electrically connected to the outgoing stationary contact through the transition copper busbar.

[0007] Preferably, the transition copper busbar has a flat sheet structure, and the incoming or outgoing stationary contact is vertically inserted and fixed on the transition copper busbar, with the transition copper busbar being attached and fixed to the incoming or outgoing end.

[0008] The high-capacity disconnect switch also includes a bracket. Both the first disconnect switch and the second disconnect switch are fixedly connected to the bracket, with the first disconnect switch positioned above the second disconnect switch and the second disconnect switch positioned below the first disconnect switch. The first disconnect switch includes a first housing and a first copper busbar serving as the input terminal. The second disconnect switch includes a second housing and a second copper busbar serving as the input terminal. The first copper busbar extends from the upper end of the first housing to its side and bends downward. The second copper busbar extends from the upper end of the second housing to its side and bends upward. Thus, the extended ends of the first and second copper busbars are aligned facing each other on the side of the first housing to facilitate parallel connection of terminals.

[0009] Preferably, the first disconnecting switch further includes a first copper busbar as an outgoing terminal, and the second disconnecting switch further includes a second copper busbar as an outgoing terminal. The first copper busbar extends from the lower end of the first housing to its side and bends downward, and the second copper busbar extends from the lower end of the second housing to its side and bends upward, so that the extended ends of the first copper busbar and the second copper busbar are aligned facing each other on the side of the second housing to facilitate the parallel connection of the terminals.

[0010] Preferably, the extended ends of the first and second incoming copper busbars are disposed on the first side of the first housing, and the extended ends of the first and second outgoing copper busbars are disposed on the second side of the second housing opposite to the first side. This makes reasonable use of the layout space, so that the incoming and outgoing ends are not too close together, thereby improving heat dissipation and reducing temperature rise.

[0011] Preferably, an insulating plate is fixedly provided between the first outgoing copper busbar and the second incoming copper busbar to insulate the first outgoing copper busbar and the second incoming copper busbar.

[0012] Preferably, the insulating plate includes a first insulating plate, a second insulating plate, and a third insulating plate. The first insulating plate is fixedly disposed between the first housing and the second housing. The second insulating plate and the third insulating plate are respectively located at both ends of the first insulating plate. The first insulating plate, the second insulating plate, and the third insulating plate are connected in a "Z" shaped structure.

[0013] Preferably, the high-capacity disconnect switch further includes a positioning plate, which extends vertically. The first disconnect switch includes a first housing, and the second disconnect switch includes a second housing. The first housing and the second housing are respectively provided with a first positioning groove and a second positioning groove that match the positioning plate. The upper and lower ends of the positioning plate are respectively embedded in the first positioning groove and the second positioning groove to achieve mutual alignment of the first disconnect switch and the second disconnect switch.

[0014] Preferably, an interphase insulation plate is also provided between the phases of the incoming and outgoing terminals of the first and second disconnecting switches.

[0015] The present invention has the following beneficial effects: While increasing the current capacity of the disconnecting switch, it also reduces the temperature rise of the disconnecting switch, thereby preventing excessive temperature rise and further increasing the capacity of the disconnecting switch. Simultaneously, by incorporating an insulating plate, the present invention improves electrical insulation performance while ensuring a compact disconnecting switch structure, preventing short circuits. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram (angle 1) of the high-capacity disconnector in the embodiment;

[0017] Figure 2 This is a three-dimensional schematic diagram (angle two) of the high-capacity disconnector in the embodiment;

[0018] Figure 3 This is a three-dimensional schematic diagram of the bracket in the embodiment (angle one);

[0019] Figure 4 This is a three-dimensional schematic diagram of the bracket in the embodiment (angle two);

[0020] Figure 5 This is a three-dimensional schematic diagram of the first isolating switch in the embodiment;

[0021] Figure 6 This is a three-dimensional schematic diagram of the second isolating switch in the embodiment;

[0022] Figure 7 This is a three-dimensional schematic diagram of the connecting terminals in the embodiment;

[0023] Figure 8 This is a side view of the high-capacity disconnector in the embodiment (one side of the bracket is hidden to observe the insulating plate);

[0024] Figure 9 This is a three-dimensional schematic diagram of the high-capacity disconnector in the embodiment (angle three, one side bracket is hidden to observe the insulating plate);

[0025] Figure 10 This is a schematic diagram of a high-capacity disconnector switch with phase-to-phase insulation plates in the embodiment.

[0026] Figure 11 This is an exploded view of the structure of the first disconnecting switch in the embodiment;

[0027] Figure 12 This is a schematic diagram of the conductive circuit portion of the first disconnecting switch in the embodiment;

[0028] Figure 13 This is a schematic diagram of the operating mechanism in the embodiment;

[0029] Figure 14This is a schematic diagram showing the synchronous connection of the operating mechanisms of the first and second disconnect switches in the embodiment via a coupling sleeve;

[0030] Figure 15 This is a schematic diagram of the elastic pin and sliding bracket in the embodiment. Detailed Implementation

[0031] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention, primarily used to illustrate the embodiments and to explain the operating principles of the embodiments in conjunction with the relevant descriptions in the specification. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention. Components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0032] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0033] As a preferred embodiment of the present invention, a high-capacity disconnecting switch is provided, see reference. Figure 1-4 As shown, the high-capacity disconnect switch includes a first disconnect switch 1 and a second disconnect switch 2. Both the first disconnect switch 1 and the second disconnect switch 2 are fixedly connected (e.g., screwed) to a bracket 3. For ease of description, the first disconnect switch 1 is positioned above the second disconnect switch 2, and the second disconnect switch 2 is positioned below the first disconnect switch 1, i.e., the first disconnect switch 1 and the second disconnect switch 2 are arranged vertically opposite each other. The bracket 3 has two mirror images, which are fixed to the sides of the first disconnect switch 1 and the second disconnect switch 2, respectively. The bracket 3 specifically includes a base frame 31 and a connecting frame 32. The base frame 31 is a bent sheet-like mechanism, including a support leg 311 and a connecting panel 312. The connecting panel 312 is fixedly connected (e.g., screwed) to the connecting frame 32. The connecting frame 32 has an L-shaped bent sheet-like structure, with one flat surface fixed to the connecting panel 312 of the base frame 31, and the other flat surface fixed to either the first disconnect switch 1 or the second disconnect switch 2. In this embodiment, each bracket 3 is provided with three connecting brackets 32. The first disconnecting switch 1 and the second disconnecting switch 2 are fixedly connected by multiple connecting brackets 32, which makes the bracket 3 low cost and provides stable support. The support leg 311 is also provided with a U-shaped groove 3112 and a hanging hole 3113. In this embodiment, in addition to placing the bracket 3 on the ground, the high-capacity disconnecting switch can also be hung on the wall through the U-shaped groove 3112 and the hanging hole 3113. Since the high-capacity disconnecting switch is heavy, the high-capacity disconnecting switch is first lifted, and then inserted into the screw positioned on the wall through the U-shaped groove 3112. Then, the screw is hung on the wall through the hanging hole 3113. Finally, the high-capacity disconnecting switch is pushed down so that the screw is further inserted into the U-shaped groove 3112 and the hanging hole 3113, thus completing the fixation of the high-capacity disconnecting switch on the wall.

[0034] See also Figure 5-8 The first disconnecting switch 1 includes a first incoming copper busbar 11 as the incoming end and a first outgoing copper busbar 12 as the outgoing end. The second disconnecting switch 2 includes a second incoming copper busbar 21 as the incoming end and a second outgoing copper busbar 22 as the outgoing end. The first incoming copper busbar 11 and the second incoming copper busbar 21 are connected in parallel through a connecting terminal 4. The first outgoing copper busbar 12 and the second outgoing copper busbar 22 are also connected in parallel through a connecting terminal 4. Thus, the first disconnecting switch 1 and the second disconnecting switch 2 are connected in parallel to form a high-capacity disconnecting switch. In this embodiment, the first disconnecting switch 1 and the second disconnecting switch 2 have the same specifications and structure. Therefore, the current capacity of the high-capacity disconnecting switch is doubled.

[0035] The connecting terminal 4 includes a parallel connecting part 43 and a first clamping terminal piece 41 and a second clamping terminal piece 42 that are fixedly and electrically connected to the parallel connecting part 43. The parallel connecting part 43 is simultaneously electrically connected to the inlet (or outlet) terminals of the first disconnecting switch 1 and the second disconnecting switch 2 to realize the parallel connection of the first disconnecting switch 1 and the second disconnecting switch 2 at the inlet and outlet terminals. The first clamping terminal piece 41 and the second clamping terminal piece 42 are both flat plate structures and are arranged at intervals. When wiring a high-capacity disconnecting switch, the external conductive copper busbar is inserted between the first clamping terminal piece 41 and the second clamping terminal piece 42 and clamped and fixed by the first clamping terminal piece 41 and the second clamping terminal piece 42. Specifically, in this embodiment, a bolt connection is used to tightly clamp the first clamping terminal piece 41, the second clamping terminal piece 42 and the external conductive copper busbar together, thereby realizing the electrical connection. Since this embodiment uses a first clamping connector 41 and a second clamping connector 42 to clamp and connect the external conductive copper busbar, the heat dissipation area is increased. The first clamping connector 41 and the second clamping connector 42 dissipate heat simultaneously, reducing the temperature rise of the product during operation and improving electrical performance.

[0036] Although this embodiment uses two clamping terminals (i.e., the first clamping terminal 41 and the second clamping terminal 42) for wiring, in other embodiments, three, four or more clamping terminals may be provided as needed based on the number of external conductive copper busbars to be wired. Each clamping terminal is arranged at intervals, and the external conductive copper busbar is electrically connected by clamping and fixing two adjacent clamping terminals, thereby reducing the temperature rise of the product while ensuring increased current capacity.

[0037] The first disconnecting switch 1 includes a first housing 10, and the second disconnecting switch 2 includes a second housing 20. The first incoming copper busbar 11 extends from the upper end of the first housing 10 to its side and bends downward. The second incoming copper busbar 21 extends from the upper end of the second housing 20 to its side and bends upward. Thus, the extended ends 110 and 210 of the first incoming copper busbar 11 and the second incoming copper busbar 21 are aligned with each other on the side of the first housing 10. That is, the first incoming copper busbar 11 and the second incoming copper busbar 21 extend close to each other on the side of the first housing 10, so that the parallel connection part 43 of the connection terminal 4 can be conveniently electrically connected to the relatively close first incoming copper busbar 11 and the second incoming copper busbar 21.

[0038] Similarly, the first copper busbar 12 extends from the lower end of the first housing 10 to its side and bends downward, and the second copper busbar 22 extends from the lower end of the second housing 20 to its side and bends upward. Thus, the extended ends 120 and 220 of the first copper busbar 12 and the second copper busbar 22 are aligned with each other on the side of the second housing 20. In other words, the first copper busbar 12 and the second copper busbar 22 extend close to each other on the side of the second housing 20 to facilitate the connection of the terminal 4.

[0039] Preferably, the extended ends 110 and 120 of the first incoming copper busbar 11 and the second incoming copper busbar 21 are located on the first side of the first housing 10. In this embodiment, the extended ends 120 and 220 of the first outgoing copper busbar 12 and the second outgoing copper busbar 22 are located on the second side of the second housing 20 opposite to the first side. This means that the connection terminals 4 of the incoming end and the connection terminals 4 of the outgoing end of the high-capacity disconnect switch are located on opposite sides of the high-capacity disconnect switch, thereby making reasonable use of the layout space and ensuring that the incoming and outgoing ends are not too close together, which can also improve the heat dissipation function and reduce the temperature rise.

[0040] Although this embodiment describes a preferred arrangement of the incoming and outgoing copper busbars, in practical applications, other arrangements of the incoming and outgoing copper busbars can be used as needed, as long as the incoming terminals of the two disconnect switches can be connected in parallel using connecting terminals, and the outgoing terminals can also be connected in parallel.

[0041] To facilitate the alignment of the first disconnector switch 1 and the second disconnector switch 2 during installation, such as Figure 2 The high-capacity disconnect switch also includes a positioning plate 9, which extends vertically. The first housing 10 and the second housing 20 are respectively provided with a first positioning groove and a second positioning groove matching the positioning plate 9 (e.g., ...). Figure 2 The first positioning groove 13) is provided in the first positioning groove and the second positioning groove respectively at the upper and lower ends of the positioning plate 9, so as to realize the mutual alignment of the first disconnecting switch 1 and the second disconnecting switch 2.

[0042] And, such as Figure 8-9Since the first outgoing copper busbar 12 and the second incoming copper busbar 21 are relatively close, in order to ensure the compact structure of the disconnecting switch while achieving electrical insulation and preventing short circuits, an insulating plate is also provided between the first outgoing copper busbar 12 and the second incoming copper busbar 21. The insulating plate includes a first insulating plate 300, a second insulating plate 301, and a third insulating plate 302. The first insulating plate 300 is fixedly disposed between the first housing 10 and the second housing 20. The second insulating plate 301 and the third insulating plate 302 are located at both ends of the first insulating plate 300, and the first insulating plate 300, the second insulating plate 301, and the third insulating plate 302 are connected in a "Z"-shaped structure, so that the insulating plate can fully insulate the first outgoing copper busbar 12 and the second incoming copper busbar 21 between them. For fixing the first insulating plate 300, the second insulating plate 301, and the third insulating plate 302, they can be selected to be plugged into the positioning plate 9, or other fixing methods can be used, such as screwing them into the first housing 10 or the second housing 20.

[0043] In addition, to improve phase-to-phase insulation performance, please refer to Figure 10 Alternatively, a phase spacer 303 can be installed between phases (as shown in this embodiment, a three-phase high-capacity disconnector can have a phase spacer 303 installed between the input and output terminals of two adjacent phases). The phase spacer 303 can be installed by plugging it into the second insulating plate 301 or the third insulating plate 302.

[0044] Aside from the different arrangement of the incoming and outgoing copper busbars, the contact system structure within the housings of the first disconnecting switch 1 and the second disconnecting switch 2 in this embodiment is the same. The following description uses the first disconnecting switch 1 as an example. (See reference...) Figure 11-12 The first housing 10 of the first disconnecting switch 1 includes an upper housing 101 and a lower housing 102 that are joined together. The first incoming copper busbar 11 is bolted to the upper housing 101, while the first outgoing copper busbar 12 is bolted to the lower housing 102. The contact system of the first disconnecting switch 1 includes an incoming stationary contact 61 electrically connected to the first incoming copper busbar 11, an outgoing stationary contact 62 electrically connected to the first outgoing copper busbar 12, and a moving contact assembly 7 movably disposed inside the first housing 10. The moving contact assembly 7 moves to simultaneously contact or separate from the incoming stationary contact 61 and the outgoing stationary contact 62, thereby realizing the connection or disconnection of the first disconnecting switch 1. Specifically, in this embodiment, the moving contact assembly 7 includes a sliding bracket 72 slidably connected inside the first housing 10, and the moving contact 71 is fixedly connected to the sliding bracket 72 to follow the sliding bracket 72 to realize the connection or disconnection of the circuit. In this example, the moving contact 71 is a roller-type moving contact. When the sliding bracket 72 slides to achieve contact connection, the stationary contact is inserted between the contact rollers and maintains close contact under the clamping of the contact rollers, and the contact rollers roll to improve contact performance and prevent contact welding.

[0045] Specifically, this embodiment also includes a transition copper busbar 5, which electrically connects the first incoming copper busbar 11 (first outgoing copper busbar 12) and the incoming stationary contact 61 (outgoing stationary contact 62). For example, see [reference needed]. Figure 11-12 A transition copper busbar 5 is embedded in the upper housing 101. The transition copper busbar 5 has a flat plate structure. The incoming line stationary contact 61 is vertically inserted and fixed in the socket of the transition copper busbar 5. The first incoming line copper busbar 11 is screwed and tightly fitted to the transition copper busbar 5. By setting a transition copper busbar 5 to connect the incoming and outgoing lines and the stationary contact, and the stationary contact is vertically inserted into the flat plate-shaped transition copper busbar 5, the heat dissipation area is further increased and the product temperature rise is reduced.

[0046] To extinguish the arc generated during disconnection, this embodiment also includes an arc-extinguishing grid plate 400 fixedly provided around the stationary contact. Simultaneously, to buffer the sliding stroke of the sliding bracket 72, a buffer pad 600 can be provided along the sliding path of the sliding bracket 72 to prevent damage caused by the sliding bracket 72 impacting the housing. Specifically, in this embodiment, the buffer pad 600 is fixedly placed on the first housing 10.

[0047] The sliding bracket 72 is driven by the operating mechanism 8, see reference. Figure 13-14 The operating mechanism 8 includes a rotating shaft 81 rotatably mounted on the first housing 10, a cantilever 82 with its hub connected to the rotating shaft 81, and a tension spring 83 that provides elastic force for the cantilever 82 to rotate about the axis of the rotating shaft 81. Manual or electric operation rotates the rotating shaft 81, causing the tension spring 83 to pass its dead center, which in turn pulls the cantilever 82 to swing rapidly. The cantilever 82 is linked to the sliding bracket 72, causing the sliding bracket 72 to slide. The operating mechanisms 8 on the first disconnect switch 1 and the second disconnect switch 2 are coaxially connected via a coupling sleeve 500, allowing the operating mechanisms 8 on the first disconnect switch 1 and the second disconnect switch 2 to move synchronously, thereby synchronously driving the moving contact assemblies 7 of the first disconnect switch 1 and the second disconnect switch 2 to move.

[0048] See Figure 15In this embodiment, a spring needle 700 is also provided. The sliding bracket 72 is provided with a groove 721 opened along its sliding direction. The spring needle 700 is embedded in the first housing 10 and cooperates in the groove 721. When the sliding bracket 72 slides, the groove 721 compresses the spring needle 700, causing the spring needle 700 to undergo elastic deformation and generate elastic potential energy. Specifically, in this embodiment, the groove 721 and the spring needle 700 are configured such that when the operating mechanism 8 is at the dead point, the deformation of the spring needle 700 is the largest and the elastic potential energy is also the largest. Therefore, when the operating mechanism 8 passes the dead point and pulls the sliding bracket 72 to slide, the spring needle 700 releases its elastic potential energy to accelerate the sliding of the sliding bracket 72 and improve the switching performance. Of course, in other embodiments, the elastic pin 700 can also be replaced with other elastic elements, such as springs, spring sheets, etc. However, in this embodiment, through the cooperation of the sliding groove 721 and the elastic pin 700, the sliding bracket 72 can also be limited to slide, thus preventing the sliding bracket 72 in the open state from sliding and closing on its own under the influence of gravity when the disconnecting switch is installed in an inclined state.

[0049] Although the invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail made to the invention without departing from the spirit and scope of the invention as defined in the appended claims fall within the protection scope of the invention.

Claims

1. A high-capacity disconnect switch, characterized in that: The device includes a first disconnect switch, a second disconnect switch, and a connecting terminal. The input terminals of the first and second disconnect switches are connected in parallel through the connecting terminal, and the output terminals of the first and second disconnect switches are also connected in parallel through the connecting terminal. The connecting terminal includes at least two clamping terminals arranged at intervals. The clamping terminals are flat and fixed by the clamping of two adjacent clamping terminals to electrically connect to an external conductive copper busbar. The device also includes a bracket. The first and second disconnect switches are both fixedly connected to the bracket, with the first disconnect switch positioned above the second disconnect switch and the second disconnect switch positioned below the first disconnect switch. The first disconnect switch includes a first housing and a first input copper busbar as the input terminal. The second disconnect switch includes a second housing and a second input copper busbar as the input terminal. The first input copper busbar extends from the upper end of the first housing to its side and bends downward. The second input copper busbar extends from the upper end of the second housing to its side and bends upward, so that the extended ends of the first and second input copper busbars are aligned facing each other on the side of the first housing.

2. The high-capacity disconnector according to claim 1, characterized in that: Both the first disconnecting switch and the second disconnecting switch further include an incoming stationary contact and an outgoing stationary contact, as well as a transition copper busbar. The incoming terminals of the first disconnecting switch and the second disconnecting switch are electrically connected to the incoming stationary contact through the transition copper busbar, and the outgoing terminals of the first disconnecting switch and the second disconnecting switch are electrically connected to the outgoing stationary contact through the transition copper busbar.

3. The high-capacity disconnector according to claim 2, characterized in that: The transition copper busbar has a flat sheet structure, and the incoming or outgoing stationary contact is vertically inserted and fixed on the transition copper busbar. The transition copper busbar is attached and fixed to the incoming or outgoing end.

4. The high-capacity disconnect switch according to claim 1, characterized in that: The first disconnecting switch also includes a first outgoing copper busbar as an outgoing terminal, and the second disconnecting switch also includes a second outgoing copper busbar as an outgoing terminal. The first outgoing copper busbar extends from the lower end of the first housing to its side and bends downward, and the second outgoing copper busbar extends from the lower end of the second housing to its side and bends upward, so that the extended ends of the first outgoing copper busbar and the second outgoing copper busbar are aligned facing each other on the side of the second housing.

5. The high-capacity disconnector according to claim 4, characterized in that: The extended ends of the first incoming copper busbar and the second incoming copper busbar are disposed on the first side of the first housing, and the extended ends of the first outgoing copper busbar and the second outgoing copper busbar are disposed on the second side of the second housing opposite to the first side.

6. The high-capacity disconnector according to claim 4, characterized in that: An insulating plate is fixedly installed between the first outgoing copper busbar and the second incoming copper busbar to insulate the first outgoing copper busbar and the second incoming copper busbar.

7. The high-capacity disconnector according to claim 6, characterized in that: The insulating plate includes a first insulating plate, a second insulating plate, and a third insulating plate. The first insulating plate is fixedly disposed between the first housing and the second housing. The second insulating plate and the third insulating plate are located at both ends of the first insulating plate, and the first insulating plate, the second insulating plate, and the third insulating plate are connected in a "Z" shaped structure.

8. The high-capacity disconnector according to claim 1, characterized in that: It also includes a positioning plate, which extends vertically. The first housing and the second housing are respectively provided with a first positioning groove and a second positioning groove that match the positioning plate. The upper and lower ends of the positioning plate are respectively embedded in the first positioning groove and the second positioning groove to achieve mutual alignment of the first disconnecting switch and the second disconnecting switch.

9. The high-capacity disconnector according to claim 1, characterized in that: Phase-to-phase insulation plates are also provided between the phases of the incoming and outgoing terminals of the first and second disconnecting switches.

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