A 40.5kV three-position combined electric appliance main circuit for an isolating circuit breaker of an air chamber

Abstract

The utility model relates to a 40.5kV isolation circuit breaker three position combination electric appliance main loop for inflating cabinet, including main loop mounting bracket, vacuum interrupter, circuit breaker main shaft and isolator operating shaft, be equipped with the fixed seat for vacuum interrupter fixation in the side of main loop assembly frame, three groups of vacuum interrupter fixedly connect on the fixed seat, the insulation pull rod of vacuum interrupter extends to the cavity below the fixed seat, the circuit breaker main shaft passes through the cavity below the fixed seat and is connected with the fixed seat rotation cooperation, three groups of main shaft crank of circuit breaker main shaft are connected with the insulation pull rod below three groups of vacuum interrupter swing respectively, the isolator operating shaft rotation setting is in the upper portion of main loop mounting bracket, and three groups of isolation knife switches are fixed on the isolator operating shaft, and are equipped with isolation contact on the lateral wall of three groups of vacuum interrupter. The utility model through to the optimization of the layout of each component, can make the volume of main loop smaller, and can make the assembly and maintenance of each component more convenient.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker switching technology, and in particular to a main circuit of a three-position combination electrical appliance for a 40.5kV lower isolating circuit breaker used in gas-insulated switchgear. Background Technology

[0002] Three-position circuit breaker switchgear is a key device in power systems used for isolating and controlling circuits. It typically includes a circuit breaker module, a three-position switch module, and a main circuit module. In the prior art, three-position circuit breaker switchgear has a wide range of applications, such as in gas-insulated switchgear. However, the main circuit of existing three-position circuit breaker switchgear has a complex structure, a non-compact layout, is inconvenient for assembly and maintenance, and has low internal space utilization, resulting in a large gas-insulated switchgear volume. For example, patent publication number CN103996990A discloses a gas-insulated switchgear with a vacuum circuit breaker installed in the upper part of the gas box, a disconnecting switch in the middle of the gas box, and a main circuit in the lower part of the gas box. The control room contains the disconnecting switch operating mechanism and the vacuum circuit breaker operating mechanism. In this scheme, the disconnecting switch operating mechanism and the vacuum circuit breaker operating mechanism are located in the control room, while the vacuum circuit breaker is located in the upper part of the gas box, the disconnecting switch is located in the middle of the gas box, and the main circuit is located in the lower part of the gas box. Because the disconnecting switch operating mechanism and the vacuum circuit breaker operating mechanism need to control the disconnecting switch and the vacuum circuit breaker respectively, and at the same time realize the control of the main circuit, this structure will make the control structure of the main circuit complex, the gas filling cabinet will be large in size, and it will be inconvenient for the assembly and maintenance of the combined electrical appliances. Summary of the Invention

[0003] The purpose of this invention is to solve the problems existing in the main circuit of the combined electrical appliance described in the background art, and to provide a three-position combined electrical appliance main circuit for a 40.5kV lower isolating circuit breaker for gas-filled switchgear.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A 40.5kV lower isolating circuit breaker three-position combined electrical appliance main circuit for a gas-insulated switchgear includes a main circuit mounting frame, vacuum interrupters, a circuit breaker main shaft, and an isolating switch operating shaft. A mounting base for fixing the vacuum interrupters is provided on one side of the main circuit mounting frame. Three sets of vacuum interrupters are fixedly connected to the mounting base. The insulating rods of the three sets of vacuum interrupters extend into the lower cavity of the mounting base. Upper terminal blocks are provided on the top of each of the three sets of vacuum interrupters. The circuit breaker main shaft passes through the lower cavity of the mounting base and is rotatably connected to the mounting base. Three sets of main shaft crank arms are fixedly connected to the circuit breaker main shaft. The ends of the three sets of main shaft crank arms are movably connected to the insulating rods at the bottom of the three sets of vacuum interrupters, respectively, for isolating... The switch operating shaft is rotatably mounted on the upper part of the main circuit mounting frame. Three sets of isolating switches are fixed on the operating shaft of the disconnecting switch. Isolating contacts are provided on the side walls of the three sets of vacuum interrupters. The positions of the three sets of isolating contacts correspond to the positions of the three sets of isolating switches. A grounding bus mount is also provided on the main circuit mounting frame. The grounding bus is fixedly connected to the grounding bus mount. Three sets of grounding contacts are provided on the grounding bus, and the positions of the three sets of grounding contacts correspond to the positions of the three sets of isolating switches. A lower connecting insulator is also provided on the operating shaft of the disconnecting switch. A lower connecting copper bus is embedded inside the lower connecting insulator. The lower connecting copper bus is rotatably connected to the isolating switches. The lower connecting insulator is fixedly connected to the fixed base.

[0005] In the above scheme, the main circuit mounting bracket includes a fixed base, a front side plate, and a rear side plate. The front and rear side plates are fixedly connected to the front and rear sides of the fixed base, respectively. Three vacuum interrupter assembly ports are distributed along the front-to-back direction on the fixed base. The shell of the vacuum interrupter is fixedly connected to the fixed base. Assembly holes for assembling the circuit breaker main shaft are provided on the front and rear side plates at locations corresponding to the fixed base. A partition is provided below the fixed base, positioned between the vacuum interrupters. Through holes are provided on the partition corresponding to the assembly holes. The circuit breaker main shaft passes through the assembly holes and the through holes on the partition sequentially. A cavity is provided between adjacent partitions. The insulating tie rod at the bottom of the vacuum interrupter extends into the cavity. The main shaft crank arm on the circuit breaker main shaft is located within the cavity and is movably connected to the insulating tie rod. This design simplifies the structure of the main circuit mounting bracket and makes the connection between the vacuum interrupter, the circuit breaker main shaft, and the disconnector switch operating shaft more stable.

[0006] In the above scheme, the disconnector operating shaft mounting part is located on the upper part of the front and rear side plates. A bearing seat is provided on the rear side plate, and the disconnector operating shaft is rotatably connected to the bearing on the bearing seat. An isolating switch protective cover is provided on the outer side of the isolating switch, and the end of the isolating switch extends to the outer side of the isolating switch protective cover. The lower connecting copper busbar is located below the disconnector operating shaft and is hinged to the isolating switch. A metal nut insert is embedded in the side wall of the lower connecting insulator facing the fixed seat, and the metal nut insert is fixedly connected to the fixed seat by bolts. This arrangement enhances the insulation of the disconnector operating shaft and ensures a stable connection between the isolating switch and the disconnector operating shaft. When the disconnector operating shaft rotates, it drives the isolating switch to rotate synchronously, making the operation of the disconnector more reliable. The arrangement of the lower connecting copper busbar and the insulator ensures a more stable connection of the lower connecting copper busbar and guarantees its insulation.

[0007] In the above design, a reinforcing rib is provided between the isolating switch protective cover and the isolating switch operating shaft. This design enhances the strength of the connection between the insulating sleeve and the isolating switch protective cover, preventing cracking and extending their service life.

[0008] In the above scheme, the upper end of the lower connecting copper busbar is located above the lower connecting insulator, and the upper end of the lower connecting copper busbar is hinged to the isolating switch. The lower end of the lower connecting copper busbar protrudes outside the lower connecting insulator. A triangular fixed support is provided on one side of the lower connecting insulator, and the lower connecting insulator is connected to the fixed support through the triangular fixed support. This arrangement makes the connection between the lower connecting insulator and the fixed support more stable, the support of the lower connecting copper busbar more stable, the insulation better, and the integration higher.

[0009] In the above scheme, the fixing seat is located on the left side of the main circuit mounting frame, the disconnector switch operating shaft mounting part is located in the middle of the main circuit mounting frame, and the grounding busbar mounting seat is located on the right side of the main circuit mounting frame. The front end and rear end of the grounding busbar mounting seat are fixedly connected to the front side plate and the rear side plate, respectively. This arrangement makes the main circuit structure more compact and the layout more reasonable.

[0010] In the above design, the shell of the vacuum interrupter is made of nylon. This design reduces the cost of the vacuum interrupter shell and allows it to degrade naturally after disposal, thus avoiding environmental pollution.

[0011] In the above scheme, the isolating contact is fixedly installed on the side wall of the vacuum interrupter. This arrangement integrates the isolating contact into the vacuum interrupter, saving space, reducing manufacturing costs, and resulting in a more robust structure.

[0012] In the above solution, the disconnector operating shaft comprises three spliced ​​sections, each with a connector at both ends. The spliced ​​sections are connected via these connectors, and circumferential engagement and positioning are achieved through protrusions and grooves within the connectors. This design allows the disconnector operating shaft to be molded using small molds, reducing mold costs, increasing yield, and facilitating installation.

[0013] This invention offers several advantages: The main circuit of the 40.5kV lower disconnect circuit breaker three-position combined electrical appliance for gas-insulated switchgear is suitable for applications where the disconnector operating mechanism is located below the circuit breaker operating mechanism. Through optimized component layout, the main circuit structure is more compact and rationally arranged, resulting in a smaller overall size and easier assembly and maintenance. Furthermore, the 40.5kV lower disconnect circuit breaker three-position combined electrical appliance main circuit for gas-insulated switchgear provides better insulation performance and improved operational reliability. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the front structure of the main circuit of the three-position combined electrical appliance of the 40.5kV lower isolating circuit breaker for the gas-insulated switchgear of this utility model.

[0015] Figure 2 This is a schematic diagram of the rear structure of the main circuit of the three-position combined electrical appliance of the 40.5kV lower isolating circuit breaker for the gas-insulated switchgear of this utility model.

[0016] Figure 3 This is a schematic diagram of the bottom structure of the main circuit of the three-position combined electrical appliance of the 40.5kV lower isolating circuit breaker for the gas-insulated switchgear of this utility model.

[0017] Figure 4 This is a schematic diagram of the connection structure between the main shaft of the circuit breaker and the insulating tie rod of the vacuum interrupter.

[0018] Figure 5 This is a schematic diagram of the connection structure between the lower wiring copper busbar, the operating shaft of the disconnecting switch, and the fixing base of this utility model.

[0019] The attached diagram is labeled as follows: main circuit mounting bracket 1, front side plate 11, fixed seat 12, rear side plate 13, partition 14, grounding bus mounting seat 15, bearing seat 16, vacuum interrupter 2, insulating tie rod 21, isolating contact 22, upper terminal block 23, circuit breaker main shaft 3, main shaft crank arm 31, disconnector switch operating shaft 4, lower terminal insulator 41, lower terminal copper bus 411, fixed support seat 412, isolating switch 42, isolating switch protective cover 43, reinforcing rib 44, splicing section 45, plug interface 451, grounding bus 5, and grounding contact 51. Detailed Implementation

[0020] The technical solution of this utility model will be clearly and completely described below through embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0021] like Figure 1-5 As shown, the main circuit of the 40.5kV lower isolating circuit breaker three-position combined electrical appliance of the gas-insulated switchgear of this utility model includes a main circuit mounting frame 1, a vacuum interrupter 2, a circuit breaker main shaft 3, and an isolating switch operating shaft 4.

[0022] The main circuit mounting frame 1 is the assembly skeleton for each component of the main circuit of the combined electrical appliance. The material of the main circuit mounting frame 1 is preferably high-strength plate or profile.

[0023] The main circuit mounting bracket 1 includes a mounting base 12, a front side plate 11, and a rear side plate 13. The front side plate 11 and the rear side plate 13 are respectively fixedly connected to the front and rear sides of the mounting base 12. The mounting base 12 can be located on one side of the main circuit mounting bracket 1, for example, as shown in the image. Figure 1 As shown, it is located on the left side of the main circuit mounting bracket 1. The structure of the fixing base 12 can be designed as a cuboid, and the bottom of the fixing base 12 does not need to be provided with a base plate. With this configuration, the fixing base 12 can form a stable connection with the front side plate 11 and the rear side plate 13, ensuring the stability of the positions of the front side plate 11 and the rear side plate 13.

[0024] Three vacuum interrupter assembly ports are provided on the upper plate of the fixed base 12. The vacuum interrupter 2 is fixedly connected to the part next to the vacuum interrupter assembly port through the lower end face of its shell. Several metal nuts can be embedded in the lower end face of the vacuum interrupter 2. The vacuum interrupter 2 can be fixedly connected to the fixed base 12 by bolts, and the insulating pull rod 21 at the lower part of the vacuum interrupter 2 extends into the cavity of the fixed base 12.

[0025] like Figure 3 As shown, to make the structure of the fixed base 12 more stable and to isolate the vacuum interrupters 2, a partition 14 is provided in the cavity of the fixed base 12, and the partition 14 is positioned between adjacent vacuum interrupters 2. The partition 14 is provided with a through hole for the circuit breaker main shaft 3 to pass through.

[0026] Mounting holes for assembling the circuit breaker main shaft 3 are respectively provided on the front side plate 11 and the rear side plate 13. The positions of the mounting holes correspond to the positions of the through holes on the partition plate 14, such as... Figure 1 and 3 As shown, the mounting holes are located on the lower left side of the front side plate 11 and the rear side plate 13. The circuit breaker main shaft 3 passes through the mounting holes and the through holes on the partition plate 14 in sequence. Figure 4 As shown, three sets of spindle crank arms 31 are fixedly connected to the main spindle 3 of the circuit breaker. The three sets of spindle crank arms 31 are set at positions corresponding to the three sets of vacuum interrupters 2. The ends of the three sets of spindle crank arms 31 are respectively movably connected to the insulating pull rods 21 at the bottom of the three sets of vacuum interrupters 2. The rotation of the main spindle 3 of the circuit breaker can drive the insulating pull rods 21 to move up and down, thereby realizing the up and down movement of the moving contacts inside the vacuum interrupter 2, and thus realizing the switching operation.

[0027] The three sets of vacuum interrupters 2 can use existing vacuum interrupters, preferably vacuum interrupters with nylon shells. This design reduces the cost of the vacuum interrupter shell and allows it to degrade naturally after disposal, avoiding environmental pollution.

[0028] Isolation contacts 22 are provided on one side wall of the three sets of vacuum interrupters 2 facing the main circuit mounting frame 1. The isolation contacts 22 are fixedly connected to the vacuum interrupters 2. With this arrangement, the isolation contacts 22 can be integrated into the vacuum interrupters 2, saving space, reducing manufacturing costs, and making the structure more robust.

[0029] Each of the three sets of vacuum interrupters 2 is provided with an upper terminal block 23 on its top.

[0030] like Figure 1 and 2 As shown, the disconnector operating shaft 4 is connected to the upper part of the front side plate 11 and the rear side plate 13. To make the connection between the disconnector operating shaft 4 and the main circuit mounting bracket 1 more stable, a bearing seat 16 is fixed on the rear side plate 13, and a bearing is provided on the bearing seat 16. The disconnector operating shaft 4 is rotatably connected to the rear side plate 13 through the bearing. A U-shaped groove for assembling the disconnector operating shaft 4 is provided on the front side plate 11, and the disconnector operating shaft 4 is rotatably connected to the front side plate 11.

[0031] like Figure 5 As shown, three sets of isolating switches 42 are fixedly mounted on the disconnecting switch operating shaft 4. The positions of the three sets of isolating switches 42 correspond to the positions of the three sets of isolating contacts 22. An isolating switch protective cover 43 is provided on the outside of the isolating switch 42, with the ends of the isolating switches 42 extending to the outside of the isolating switch protective cover 43. The isolating switch protective cover 43 is fixedly connected to the disconnecting switch operating shaft 4, and the isolating switches 42 are housed inside the isolating switch protective cover 43, with the isolating switches 42 and the isolating switch protective cover 43 being fixedly connected. A reinforcing rib 44 is provided between the isolating switch protective cover 43 and the disconnecting switch operating shaft 4. This design enhances the strength of the connection between the disconnecting switch operating shaft 4 and the isolating switch protective cover 43, preventing cracking and extending its service life.

[0032] Preferably, the disconnector operating shaft 4 comprises three splicing sections 45, each with a connector 451 at both ends. The splicing sections 45 are connected via the connectors 451, and circumferential engagement and positioning are achieved within the connectors 451 using protrusions and grooves. This design allows the disconnector operating shaft 4 to be molded using small molds, reducing mold costs, increasing yield, and facilitating installation.

[0033] A lower wiring insulator 41 is also provided on the operating shaft 4 of the disconnecting switch. A lower wiring copper busbar 411 is embedded inside the lower wiring insulator 41. The lower wiring copper busbar 411 is rotatably connected to the disconnecting knife switch 42. For example, the lower wiring copper busbar 411 and the disconnecting knife switch 42 can be hinged. The lower wiring insulator 41 is fixedly connected to the fixed base 12.

[0034] The upper end of the lower connecting copper busbar 411 is located above the lower connecting insulator 41. The upper end of the lower connecting copper busbar 411 is hinged to the isolating switch 42, and the lower end of the lower connecting copper busbar 411 protrudes from the exterior of the lower connecting insulator 41. A triangular fixed support is provided on one side of the lower connecting insulator 41, and the lower connecting insulator is connected to the fixed base 12 through the triangular fixed support 412. This arrangement makes the connection between the lower connecting insulator 41 and the fixed base 12 more stable, the support of the lower connecting copper busbar 411 more stable, the insulation better, and the integration higher.

[0035] In order to make the connection between the lower insulator 41 and the fixed base 12 more stable, several metal nut inserts are embedded on one side wall of the fixed support base 412 facing the fixed base 12. The fixed support base 412 is fixedly connected to the fixed base 12 by bolts.

[0036] A grounding busbar mounting base 15 is also provided on the main circuit mounting frame 1. The grounding busbar mounting base 15 is located on the right side of the main circuit mounting frame 1. The front end and rear end of the grounding busbar mounting base 15 are fixedly connected to the front side plate 11 and the rear side plate 13, respectively. The grounding busbar 5 is fixedly connected to the grounding busbar mounting base 15. Three sets of grounding contacts 51 are provided on the grounding busbar 5. The positions of the three sets of grounding contacts 51 correspond to the positions of the three sets of isolating switches 42.

[0037] The main circuit of the 40.5kV lower isolating circuit breaker three-position combination electrical appliance of the gas-filled switchgear of this utility model can be used in conjunction with the patent scheme of CN111900051B entitled "Circuit Breaker Device for Wind Power Gas-Filling Switch". In use, the front side plate of the main circuit mounting bracket is fixedly connected to the rear mounting plate of the circuit breaker device for wind power gas-filling switch. The circuit breaker drive shaft of the circuit breaker module in the circuit breaker device for wind power gas-filling switch is used as the main shaft of the circuit breaker in this utility model, and the isolating drive shaft of the three-position module is used as the isolating switch operating shaft in this utility model. The circuit breaker three-position combination electrical appliance can then be assembled.

[0038] This invention relates to a 40.5kV lower disconnector circuit breaker three-position main circuit for gas-insulated switchgear. Through optimization of the layout of each component, the main circuit structure is more compact and rationally arranged, resulting in a smaller overall size and easier assembly and maintenance of each component. This invention also improves the insulation performance and operational reliability of the main circuit.

[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A main circuit of a three-position combination electrical appliance for a 40.5kV lower isolating circuit breaker used in a gas-insulated switchgear, characterized in that, The system includes a main circuit mounting bracket, vacuum interrupters, a circuit breaker main shaft, and a disconnector operating shaft. A mounting base for fixing the vacuum interrupters is located on one side of the main circuit mounting bracket. Three sets of vacuum interrupters are fixedly connected to the mounting base. The insulating rods of the three sets of vacuum interrupters extend into the lower cavity of the mounting base. Upper terminal blocks are located on the top of each of the three sets of vacuum interrupters. The circuit breaker main shaft passes through the cavity below the mounting base and is rotatably connected to it. Three sets of main shaft crank arms are fixedly connected to the circuit breaker main shaft. The ends of the three sets of main shaft crank arms are movably connected to the insulating rods at the bottom of the three sets of vacuum interrupters. The disconnector operating shaft is rotatably mounted on the main circuit mounting bracket. At the top of the mounting bracket, three sets of isolating switches are fixedly mounted on the operating shaft of the disconnecting switch. Isolating contacts are provided on the side walls of the three sets of vacuum interrupters. The positions of the three sets of isolating contacts correspond to the positions of the three sets of isolating switches. A grounding busbar mounting base is also provided on the main circuit mounting bracket. The grounding busbar is fixedly connected to the grounding busbar mounting base. Three sets of grounding contacts are provided on the grounding busbar. The positions of the three sets of grounding contacts correspond to the positions of the three sets of isolating switches. A lower connecting insulator is also provided on the operating shaft of the disconnecting switch. A lower connecting copper busbar is embedded inside the lower connecting insulator. The lower connecting copper busbar is rotatably connected to the isolating switch. The lower connecting insulator is fixedly connected to the fixed base.

2. The main circuit of the three-position combination electrical appliance for the 40.5kV lower isolating circuit breaker of the gas-insulated switchgear according to claim 1, characterized in that: The main circuit mounting bracket includes a fixed base, a front side plate, and a rear side plate. The front and rear side plates are fixedly connected to the front and rear sides of the fixed base, respectively. Three vacuum interrupter assembly ports are distributed along the front-to-back direction on the fixed base. The shell of the vacuum interrupter is fixedly connected to the fixed base. Assembly holes for assembling the circuit breaker main shaft are provided on the front and rear side plates at the locations corresponding to the fixed base. A partition is provided below the fixed base, positioned between the vacuum interrupters. Through holes are provided on the partition at the locations corresponding to the assembly holes. The circuit breaker main shaft passes through the assembly holes and the through holes on the partition in sequence. A cavity is provided between adjacent partitions. The insulating tie rod at the bottom of the vacuum interrupter extends into the cavity. The main shaft crank arm on the circuit breaker main shaft is located in the cavity, and the main shaft crank arm is movably connected to the insulating tie rod.

3. The main circuit of the three-position combination electrical appliance for the 40.5kV lower isolating circuit breaker of the gas-insulated switchgear according to claim 2, characterized in that: The disconnector switch operating shaft mounting part is located on the upper part of the front and rear side plates. A bearing seat is provided on the rear side plate. The disconnector switch operating shaft is rotatably connected to the bearing on the bearing seat. An isolation switch protective cover is provided on the outside of the isolation switch. The end of the isolation switch extends to the outside of the isolation switch protective cover. The lower connecting copper busbar is located below the disconnector switch operating shaft. The lower connecting copper busbar is hinged to the isolation switch. A metal nut insert is embedded on the side wall of the lower connecting insulator facing the fixed seat. The metal nut insert is fixedly connected to the fixed seat by bolts.

4. The main circuit of the three-position combination electrical appliance for the 40.5kV lower isolating circuit breaker of the gas-insulated switchgear according to claim 3, characterized in that: A reinforcing rib is provided between the protective cover of the isolating switch and the operating shaft of the isolating switch.

5. The main circuit of the three-position combination electrical appliance for the 40.5kV lower isolating circuit breaker of the gas-insulated switchgear according to claim 1, characterized in that: The upper end of the lower connecting copper busbar is located above the lower connecting insulator. The upper end of the lower connecting copper busbar is hinged to the isolating switch. The lower end of the lower connecting copper busbar protrudes outside the lower connecting insulator. A triangular fixed support is provided on one side of the lower connecting insulator. The lower connecting insulator is connected to the fixed support through the triangular fixed support.

6. The main circuit of the three-position combination electrical appliance for the 40.5kV lower isolating circuit breaker of the gas-insulated switchgear according to claim 2, characterized in that: The fixed base is located on the left side of the main circuit mounting frame, the disconnector switch operating shaft mounting part is located in the middle of the main circuit mounting frame, and the grounding busbar mounting base is located on the right side of the main circuit mounting frame. The front end and rear end of the grounding busbar mounting base are fixedly connected to the front side plate and the rear side plate, respectively.

7. The main circuit of the three-position combination electrical appliance for the 40.5kV lower isolating circuit breaker of the gas-insulated switchgear according to claim 1, characterized in that: The shell of the vacuum interrupter is made of nylon.

8. The main circuit of the three-position combination electrical appliance for the 40.5kV lower isolating circuit breaker of the gas-insulated switchgear according to claim 1, characterized in that: The isolating contact is fixedly installed on the side wall of the vacuum interrupter.

9. The main circuit of the three-position combination electrical appliance for the 40.5kV lower isolating circuit breaker of the gas-insulated switchgear according to claim 1, characterized in that: The disconnector operating shaft comprises three spliced ​​sections, each with a connector at both ends. The spliced ​​sections are connected via the connectors, and circumferential engagement and positioning are achieved within the connectors via protrusions and grooves.

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