Intelligent 35kv vacuum circuit breaker

Abstract

The application discloses an intelligent 35kv vacuum circuit breaker and relates to the technical field of circuit breakers.The intelligent 35kv vacuum circuit breaker comprises a switch cabinet, a circuit breaker chamber and a bus chamber.A circuit breaker chamber is formed in one side of the switch cabinet, and a bus chamber is formed in the other side of the switch cabinet.A front baffle is arranged in the circuit breaker chamber, and the bottom end of the front baffle is connected with a pushing mechanism.The outer wall of the pushing mechanism is connected with a circuit breaker mechanism.The top end of the circuit breaker mechanism is provided with a fixed pole on one side, and the top end of the fixed pole is connected with a contact arm.The outer wall of the contact arm is provided with a plum-blossom contact on one side, and the outer wall of the plum-blossom contact is connected with a static contact.The plum-blossom contact is internally provided with a first sensor.The intelligent 35kv vacuum circuit breaker disclosed by the application realizes remote switching of the position of the circuit breaker through an external electric pushing module, effectively solves the problems of high operation and maintenance cost and low efficiency caused by inconvenient traffic in remote mountainous areas, and significantly reduces the labor cost and traffic cost.

Description

Technical Field

[0001] This invention relates to the field of circuit breaker technology, specifically to an intelligent 35kV vacuum circuit breaker. Background Technology

[0002] A circuit breaker is an automatic switching device used to protect circuits. Its main function is to automatically cut off the current when abnormal faults occur in the circuit, such as overload or short circuit, to prevent equipment damage, electrical fires, or personal injury. An intelligent 35kV vacuum circuit breaker, on the other hand, is a high-voltage switching device that deeply integrates intelligent sensing, digital control, and network communication technologies into the traditional 35kV vacuum circuit breaker. It not only performs basic circuit switching and protection but also achieves self-monitoring, intelligent decision-making, and remote interaction, making it a key device for smart grids and distribution automation.

[0003] In power grid areas, 35kV vacuum circuit breakers are widely used in the distribution systems of substations in remote mountainous areas. Due to geographical limitations, these substations generally suffer from inconvenient transportation and long travel times for maintenance personnel. Furthermore, in existing technologies, the position switching of 35kV vacuum circuit breakers relies on manual operation: maintenance personnel need to go to the site, insert the operating handle into the hexagonal operating shaft, and drive the circuit breaker body to move through the screw drive. This operation method not only consumes a lot of manpower and resources and has extremely low maintenance efficiency, but also requires the operator to make small back-and-forth adjustments based on experience to straighten the circuit breaker after it has been manually cranked into place, resulting in poor operational consistency.

[0004] Meanwhile, traditional 35kV vacuum circuit breakers lack online monitoring capabilities: contact temperature detection requires maintenance personnel to conduct uninterrupted testing on-site using infrared thermometers, resulting in large data dispersion; mechanical characteristic parameter detection requires the installation of sensors and detection lines after a power outage, which is cumbersome and time-consuming, further increasing maintenance costs and grid operation risks. Summary of the Invention

[0005] The purpose of this invention is to provide an intelligent 35kV vacuum circuit breaker to solve the problems mentioned in the background art, such as the need for a large amount of manpower and material resources for operation, extremely low operation and maintenance efficiency, and lack of online monitoring capabilities.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an intelligent 35kV vacuum circuit breaker, comprising a switch cabinet, a circuit breaker compartment, and a busbar compartment. The switch cabinet has a circuit breaker compartment on one side and a busbar compartment on the other side. A front baffle is provided inside the circuit breaker compartment, and a pushing mechanism is connected to the bottom of the front baffle. A circuit breaker mechanism is connected to the outer wall of the pushing mechanism. A solid-sealed pole is installed on one side of the top of the circuit breaker mechanism, and a contact arm is connected inside the top of the solid-sealed pole. A perforated contact is installed on one side of the outer wall of the contact arm, and a stationary contact is connected to the outer wall of the perforated contact. A sensor is installed inside the perforated contact. Wheels are rotatably connected to both sides of the bottom of the circuit breaker compartment.

[0007] The first sensor is a temperature sensor used to achieve online temperature measurement;

[0008] The circuit breaker mechanism has an outer wall with a mounting plate, and a positioning seat is fixedly connected to the edge of the outer wall of the mounting plate. A toothed ring is slidably connected to the outer wall of the positioning seat, and a lead screw is fixedly connected to the middle of the side of the toothed ring near the circuit breaker mechanism.

[0009] The lead screw is threadedly connected to the propulsion mechanism and is used to drive the circuit breaker from the test position to the working position.

[0010] A bracket is fixedly connected to one side of the inner wall of the circuit breaker mechanism, and a second sensor is installed in the middle of the outer wall of the bracket. A main shaft is provided on the outer wall of the second sensor, and a generator mounting base is installed on the side of the main shaft near the bracket. A magnetic field generator is connected to the inner wall of the generator mounting base.

[0011] The second sensor is a mechanical characteristic sensor, which, in conjunction with a magnetic field generator, can detect mechanical characteristic parameters online.

[0012] Preferably, the solid-sealed poles have an "F" shaped structure and are evenly spaced. The first sensor is embedded inside the contact arm, and the distance between the second sensor and the magnetic field generator is 5mm.

[0013] Preferably, the positioning seat has an "F" shaped structure and the positioning seats are evenly distributed on the outer wall of the gear ring. A servo motor is fixedly connected to the middle of the outer wall of the mounting plate, and a main gear is fixedly connected to the output end of the servo motor.

[0014] Preferably, the outer wall of the main gear is meshed with a secondary gear, and the secondary gear is meshed with the inner wall of the gear ring. The secondary gears are distributed at equal angles. The main gear, the secondary gear and the gear ring constitute a planetary gear structure. The planet carrier is made of high-strength aluminum alloy to reduce weight and is filled with high-temperature lithium-based grease. Circulation lubrication is achieved through the oil passage of the housing.

[0015] When the servo motor starts, it drives the main gear to rotate. Since the main gear and the auxiliary gear are meshed, the rotation of the main gear will drive the auxiliary gear to rotate around the positioning rod as the axis.

[0016] Preferably, a positioning rod is rotatably connected to the middle of the secondary gear, and a base is fixedly connected to one side of the outer wall of the positioning rod. A slide rail is slidably connected to the inner wall of the base, and the inner wall of the slide rail is fixedly connected to the outer wall of the servo motor.

[0017] The rotation of the secondary gear will drive the gear ring to rotate. At this time, the gear ring is guided to rotate smoothly by the positioning seat. The rotation of the gear ring will drive the lead screw to rotate together, so that the power is transmitted to the propulsion mechanism, thereby driving the circuit breaker mechanism and solid-sealed pole and other components to move linearly.

[0018] Preferably, the base has an "O" shaped structure in the middle, the slide rails are evenly distributed, electric push columns are installed on both sides of the outer wall of the mounting plate, and the output end of the electric push column is fixedly connected to a transmission seat.

[0019] The movement of the transmission seat will drive the base, the limiting component and the stop block to move together. At this time, the base is guided to move smoothly by the slide rail.

[0020] Preferably, a limiting member is fixedly connected to the middle of the outer wall of the transmission seat, and the limiting member has an "L" shaped structure. The outer wall of the limiting member is connected to the base, and the limiting members are distributed at equal angles.

[0021] When the electric push column retracts and drives the transmission seat to return to its original position, the base is driven to return to its original position through the limiting component.

[0022] Preferably, a stop block is fixedly connected to the outer edge of the transmission seat, and the shape of the outer wall of the stop block corresponds to the tooth groove of the inner wall of the gear ring. The stop blocks are distributed at equal angles, the middle part of the transmission seat has an "O" shaped structure, and the cross-section of the stop block has an "L" shaped structure.

[0023] The stop block inserts into the tooth groove on the inner wall of the gear ring, thereby locking the gear ring to cut off the power and prevent the lead screw from overshooting. Since the gear ring is made of wear-resistant engineering plastic, it can avoid metal collisions that could generate debris that could affect the insulation.

[0024] As can be seen from the above, the intelligent 35kV vacuum circuit breaker provided by the present invention has the following beneficial effects.

[0025] The electric propulsion, bidirectional clutch, and self-calibration modules all adopt a modular quick-release design and are independent functional units. When a module fails, it can be quickly replaced as a whole through standardized flanges and quick-plug connectors. In addition, the circuit breaker position can be remotely switched through the external electric propulsion module, which effectively solves the problem of high operation and maintenance costs and low efficiency caused by inconvenient transportation in remote mountainous substations, and significantly reduces labor and transportation costs.

[0026] Online monitoring of temperature and mechanical properties can be performed without power outages. Based on real-time data, early warnings of overheating and abnormal mechanical properties can be provided, transforming fault handling from post-event maintenance to pre-event prevention and improving the safety of power grid operation.

[0027] The self-calibration system automatically corrects minor wobbling during the propulsion process, ensuring uniform contact between the plum blossom contact and the stationary contact, reducing electrical and mechanical wear, and extending equipment life; the stop block locking gear ring can reliably cut off power and lock the position, avoiding overshoot of the lead screw and metal collision debris.

[0028] When the circuit breaker mechanism reaches the working or test position, the electric push column can drive the transmission seat to move along the slide rail; the transmission seat moves synchronously with the base, limiter and stop, and the base is smoothly guided by the slide rail; then the transmission seat drives the auxiliary gear to move axially through the positioning rod, so that the auxiliary gear disengages from the main gear and gear ring; at the same time, the stop is engaged with the tooth groove of the gear ring to achieve mechanical locking of the gear ring, cut off the power transmission path and avoid overshoot of the lead screw. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0030] Figure 2 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0031] Figure 3 This is a schematic diagram of the solid-sealed pole structure of the present invention;

[0032] Figure 4 This is a schematic diagram of the overall side view structure of the present invention;

[0033] Figure 5 This is a side view of the experimental structure of the present invention;

[0034] Figure 6 This is a side view of the structure of the present invention in its working state;

[0035] Figure 7 This is a schematic diagram of the front sectional view of the contact arm structure of the present invention;

[0036] Figure 8 For the present invention Figure 1 Enlarged structural diagram at point A in the middle;

[0037] Figure 9 This is a side view of the positioning seat and gear ring of the present invention;

[0038] Figure 10 This is a schematic diagram of the three-dimensional structure of the positioning seat and gear ring of the present invention;

[0039] Figure 11 This is a three-dimensional structural diagram of the main gear and auxiliary gear of the present invention;

[0040] Figure 12 This is a schematic diagram of the main structure of the auxiliary gear and gear ring of the present invention;

[0041] Figure 13 This is a three-dimensional structural diagram of the main gear, transmission seat, and stop block of the present invention;

[0042] Figure 14 This is a three-dimensional structural diagram of the base and slide rail of the present invention;

[0043] Figure 15 This is a three-dimensional structural diagram of the transmission seat, limiting member, and stop block of the present invention;

[0044] Figure 16 This is the electrical schematic diagram of the circuit breaker of the present invention.

[0045] In the diagram: 1. Switchgear; 2. Circuit breaker compartment; 3. Busbar compartment; 4. Front baffle; 5. Propulsion mechanism; 6. Circuit breaker mechanism; 7. Solid-sealed pole; 8. Contact arm; 9. Plum blossom contact; 10. Stationary contact; 11. Sensor No. 1; 12. Wheel; 13. Bracket; 14. Sensor No. 2; 15. Magnetic field generator; 16. Main shaft; 17. Mounting plate; 18. Positioning seat; 19. Gear ring; 20. Lead screw; 21. Servo motor; 22. Main gear; 23. Secondary gear; 24. Positioning rod; 25. Base; 26. Slide rail; 27. Electric push column; 28. Transmission seat; 29. ​​Limiting element; 30. Stop; 31. Generator fixing seat. Detailed Implementation

[0046] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] Please see Figures 1-16 The present invention provides a technical solution: an intelligent 35kV vacuum circuit breaker, comprising a switch cabinet 1, a circuit breaker compartment 2, and a busbar compartment 3. The circuit breaker compartment 2 is located on one side of the switch cabinet 1, and the busbar compartment 3 is located on the other side of the switch cabinet 1. A front baffle 4 is provided inside the circuit breaker compartment 2, and a pushing mechanism 5 is connected to the bottom end of the front baffle 4. A circuit breaker mechanism 6 is connected to the outer wall of the pushing mechanism 5. A solid-sealed pole 7 is installed on one side of the top of the circuit breaker mechanism 6, and a contact arm 8 is connected inside the top of the solid-sealed pole 7. A plum blossom contact 9 is installed on one side of the outer wall of the contact arm 8, and a stationary contact 10 is connected to the outer wall of the plum blossom contact 9. A sensor 11 is installed inside the plum blossom contact 9. Wheels 12 are rotatably connected to both sides of the bottom end of the circuit breaker compartment 2.

[0048] The outer wall of the circuit breaker mechanism 6 is provided with a mounting plate 17, and a positioning seat 18 is fixedly connected to the edge of the outer wall of the mounting plate 17. A toothed ring 19 is slidably connected to the outer wall of the positioning seat 18, and a lead screw 20 is fixedly connected to the middle of the side of the toothed ring 19 near the circuit breaker mechanism 6.

[0049] The lead screw 20 is threadedly connected to the propulsion mechanism 5 and is used to drive the circuit breaker from the test position to the working position.

[0050] A bracket 13 is fixedly connected to one side of the inner wall of the circuit breaker mechanism 6, and a second sensor 14 is installed in the middle of the outer wall of the bracket 13. A main shaft 16 is provided on the outer wall of the second sensor 14, and a generator mounting base 31 is installed on the side of the main shaft 16 near the bracket 13. A magnetic field generator 15 is connected to the inner wall of the generator mounting base 31.

[0051] The solid-sealed pole 7 has an "F" shaped structure and is evenly distributed. The first sensor 11 is embedded inside the contact arm 8, and the distance between the second sensor 14 and the magnetic field generator 15 is 5mm.

[0052] The positioning seats 18 have an "F" shaped structure and are evenly distributed on the outer wall of the gear ring 19. A servo motor 21 is fixedly connected to the middle of the outer wall of the mounting plate 17, and a main gear 22 is fixedly connected to the output end of the servo motor 21. A secondary gear 23 is meshed with the outer wall of the main gear 22, and the secondary gear 23 is meshed with the inner wall of the gear ring 19. The secondary gears 23 are distributed at equal included angles. The main gear 22, the secondary gear 23, and the gear ring 19 constitute a planetary gear structure. The planetary carrier is made of high-strength aluminum alloy to reduce weight and is filled with high-temperature lithium-based grease, which is circulated through the oil passage of the housing. A positioning rod 24 is rotatably connected to the middle of the secondary gear 23, and a base 25 is fixedly connected to one side of the outer wall of the positioning rod 24. The inner wall of the base 25 slides. The base 25 is connected to a slide rail 26, and the inner wall of the slide rail 26 is fixedly connected to the outer wall of the servo motor 21. The middle part of the base 25 has an "O" shaped structure, and the slide rails 26 are evenly distributed. Electric push columns 27 are installed on both sides of the outer wall of the mounting plate 17, and the output end of the electric push column 27 is fixedly connected to a transmission seat 28. The middle part of the outer wall of the transmission seat 28 is fixedly connected to a limit member 29, and the limit member 29 has an "L" shaped structure. The outer wall of the limit member 29 is connected to the base 25, and the limit member 29 is distributed at equal angles. The edge of the outer wall of the transmission seat 28 is fixedly connected to a stop block 30, and the shape of the outer wall of the stop block 30 corresponds to the tooth groove of the inner wall of the gear ring 19. The stop block 30 is distributed at equal angles. The middle part of the transmission seat 28 has an "O" shaped structure, and the cross section of the stop block 30 has an "L" shaped structure.

[0053] In specific implementation, participants Figure 5 and Figure 6Staff checked that the metal partition separating the busbar compartment 3 and the circuit breaker compartment 2 of the air-insulated switchgear 1 was intact; they checked that the wiring of the propulsion mechanism 5 and the self-calibration system was tight and the insulation resistance was qualified, and that the communication link was smooth and the protocol was matched correctly; then they calibrated the temperature of the first sensor 11 embedded in the contact arm 8 and verified the magnetic field detection accuracy of the second sensor 14 to ensure that the monitoring data error was ≤2%. Among them, the first sensor 11 is a temperature sensor used to realize online temperature measurement, and the second sensor 14 is a mechanical characteristic sensor, which can detect mechanical characteristic parameters online in conjunction with the magnetic field generator 15.

[0054] During power supply operation: Maintenance personnel issue the "move forward to working position" operation command through the background system or local control unit. The intelligent control unit first performs a safety interlock logic verification. After the verification is passed, the propulsion mechanism 5 cooperates with the lead screw 20 to enable the circuit breaker mechanism 6 to move smoothly guided by the wheels 12. When the circuit breaker is advanced to the working position, the left and right proximity switches of the self-calibration system detect the lateral offset of the circuit breaker body. If a single-sided switch is triggered, the corresponding micro motor drives the calibration rod to extend to achieve the centering calibration of the circuit breaker body, ensuring that the plum blossom contact 9 and the stationary contact 10 are in coaxial and uniform contact. Finally, the working position signal is uploaded to the substation automation system through the IEC61850 protocol. The system confirms that the circuit breaker is ready and can perform the closing operation.

[0055] When performing a power outage operation: The background or local control unit issues an operation command to move the circuit breaker to the test position. The intelligent control unit first verifies the circuit breaker's tripping status. After the verification is passed, the lead screw 20 rotates, driving the circuit breaker mechanism 6 to retreat to the test position. The self-calibration system's calibration rod is reset to the initial position, and the test position signal is uploaded to the background to confirm that the circuit breaker has been disconnected from the main bus circuit and maintenance work can be carried out.

[0056] See Figure 7 During operation, sensor 11 inside contact arm 8 collects the contact temperature data of plum blossom contact 9 in real time. The sensor adopts a double-layer insulation encapsulation structure: the inner layer is a polytetrafluoroethylene insulating sleeve, and the outer layer is epoxy resin vacuum casting molding, which meets the insulation withstand requirements of the 40.5kV system. The data is uploaded to the background through the communication module, and an over-limit warning is triggered when the temperature exceeds the preset threshold.

[0057] See Figure 1 and Figure 8 The magnetic field generator 15 is rigidly connected to the main shaft 16 through the generator mounting base 31 and rotates synchronously with the circuit breaker opening and closing main shaft 16. The second sensor 14 on the outer wall of the bracket 13 detects the dynamic changes in magnetic field strength, converts the magnetic field change into angular displacement data of the main shaft 16, and then calculates mechanical characteristic parameters such as contact stroke and opening and closing speed based on the parameter model of the non-standard linkage mechanism. When the parameter deviation exceeds the allowable range, such as speed deviation ≥10%, a fault warning is triggered.

[0058] See Figure 11 and Figure 12 The servo motor 21 on the outer wall of the mounting plate 17 can drive the main gear 22 to rotate. Since the main gear 22 and the auxiliary gear 23 are gear meshing transmissions, the rotation of the main gear 22 drives the auxiliary gear 23 to rotate around the axis of the positioning rod 24, thereby driving the gear ring 19 to rotate. The positioning seat 18 provides radial guidance for the gear ring 19 to ensure smooth rotation. The rotation of the gear ring 19 drives the lead screw 20 to rotate synchronously. The power is transmitted to the propulsion mechanism 5 through the lead screw 20, thereby driving the circuit breaker mechanism 6 and the solid-sealed pole 7 and other components to move linearly along the guide rail.

[0059] See Figure 14 and Figure 15 When the circuit breaker mechanism 6 reaches the working or test position, the infrared sensor detects the position signal and sends an electrical signal to the controller. The controller controls the electric push column 27 to move, driving the transmission seat 28 to move along the slide rail 26. The transmission seat 28 moves synchronously with the base 25, the limiting member 29, and the stop block 30, achieving smooth guidance of the base 25 through the slide rail 26. Subsequently, the transmission seat 28 drives the auxiliary gear 23 to move axially through the positioning rod 24, causing the auxiliary gear 23 to disengage from the main gear 22 and the gear ring 19. At the same time, the stop block 30 engages with the tooth groove of the gear ring 19, achieving mechanical locking of the gear ring 19, cutting off the power transmission path, and preventing the lead screw 20 from overshooting. The stop block 30 is made of wear-resistant engineering plastic POM material, which can prevent conductive debris from metal collisions and ensure insulation performance.

[0060] The electric propulsion, bidirectional clutch, and self-calibration modules in this solution all adopt a modular quick-release design and are independent functional units. When a module fails, it can be quickly replaced as a whole through standardized flanges and quick-plug connectors. In addition, the circuit breaker position can be remotely switched through the external electric propulsion module, which effectively solves the problem of high operation and maintenance costs and low efficiency caused by inconvenient transportation to substations in remote mountainous areas, and significantly reduces labor and transportation costs.

[0061] Online monitoring of temperature and mechanical properties can be performed without power outages. Based on real-time data, early warnings of overheating and abnormal mechanical properties can be provided, transforming fault handling from post-event maintenance to pre-event prevention and improving the safety of power grid operation.

[0062] The self-correcting system automatically corrects minor wobbling during the propulsion process, ensuring uniform contact between the plum blossom contact 9 and the stationary contact 10, reducing electrical and mechanical wear, and extending equipment life; the stop block 30 locks the gear ring 19, which can reliably cut off power and lock the position, preventing the lead screw 20 from overshooting and colliding with metal debris.

[0063] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. The substitutions may be replacements of some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made to the technical solutions and inventive concepts of the present invention should all be covered within the scope of protection of the present invention.

Claims

1. An intelligent 35kV vacuum circuit breaker, comprising a switchgear (1), a circuit breaker compartment (2), and a busbar compartment (3), wherein the switchgear (1) has a circuit breaker compartment (2) on one side and a busbar compartment (3) on the other side, characterized in that: It also includes a propulsion mechanism (5), and a circuit breaker mechanism (6) is connected to the outer wall of the propulsion mechanism (5). A solid-sealed pole (7) is installed on one side of the top of the circuit breaker mechanism (6), and a contact arm (8) is connected inside the top of the solid-sealed pole (7). A plum blossom contact (9) is installed on one side of the outer wall of the contact arm (8), and a stationary contact (10) is connected to the outer wall of the plum blossom contact (9). A first sensor (11) is installed inside the plum blossom contact (9), and the first sensor (11) collects the contact temperature data of the plum blossom contact (9) in real time. The circuit breaker mechanism (6) is provided with an installation plate (17) on its outer wall, and a positioning seat (18) is fixedly connected to the edge of the outer wall of the installation plate (17). A toothed ring (19) is slidably connected to the outer wall of the positioning seat (18), and a lead screw (20) is fixedly connected to the middle of the side of the toothed ring (19) near the circuit breaker mechanism (6). The lead screw (20) is threadedly connected to the propulsion mechanism (5) and is used to drive the circuit breaker from the test position to the working position; A bracket (13) is fixedly connected to one side of the inner wall of the circuit breaker mechanism (6), and a second sensor (14) is installed in the middle of the outer wall of the bracket (13). A main shaft (16) is provided on the outer wall of the second sensor (14), and a generator mounting base (31) is installed on the side of the main shaft (16) close to the bracket (13). A magnetic field generator (15) is connected to the inner wall of the generator mounting base (31). The second sensor (14) detects the dynamic changes in the magnetic field strength. A servo motor (21) is fixedly connected to the middle of the outer wall of the mounting plate (17), and a main gear (22) is fixedly connected to the output end of the servo motor (21). A secondary gear (23) is meshed with the outer wall of the main gear (22), and the secondary gear (23) is meshed with the inner wall of the gear ring (19). The secondary gears (23) are distributed at equal angles. Electric push columns (27) are installed on both sides of the outer wall of the mounting plate (17), and a transmission seat (28) is fixedly connected to the output end of the electric push column (27). A limiter (29) is fixedly connected to the middle of the outer wall of the transmission seat (28), and a stop block (30) is fixedly connected to the edge of the outer wall of the transmission seat (28).

2. The intelligent 35kV vacuum circuit breaker according to claim 1, characterized in that: The solid-sealed pole (7) has an "F" shaped structure and is evenly distributed. The first sensor (11) is embedded inside the contact arm (8). The distance between the second sensor (14) and the magnetic field generator (15) is 5 mm.

3. The intelligent 35kV vacuum circuit breaker according to claim 2, characterized in that: The positioning seat (18) has an "F" shaped structure, and the positioning seats (18) are evenly distributed on the outer wall of the gear ring (19).

4. The intelligent 35kV vacuum circuit breaker according to claim 3, characterized in that: The main gear (22), the secondary gear (23), and the gear ring (19) constitute a planetary gear structure.

5. The intelligent 35kV vacuum circuit breaker according to claim 4, characterized in that: The middle part of the auxiliary gear (23) is rotatably connected to a positioning rod (24), and a base (25) is fixedly connected to one side of the outer wall of the positioning rod (24). A slide rail (26) is slidably connected to the inner wall of the base (25), and the inner wall of the slide rail (26) is fixedly connected to the outer wall of the servo motor (21).

6. The intelligent 35kV vacuum circuit breaker according to claim 5, characterized in that: The base (25) has an "O" shaped structure in the middle, and the slide rails (26) are evenly distributed.

7. The intelligent 35kV vacuum circuit breaker according to claim 6, characterized in that: The limiting member (29) has an "L" shaped structure. The outer wall of the limiting member (29) is connected to the base (25), and the limiting member (29) is distributed at equal angles.

8. The intelligent 35kV vacuum circuit breaker according to claim 7, characterized in that: The outer wall shape of the stop block (30) corresponds to the tooth groove of the inner wall of the gear ring (19), and the stop blocks (30) are distributed at equal angles. The middle part of the transmission seat (28) has an "O" shaped structure, and the cross section of the stop block (30) has an "L" shaped structure.

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