A reclosing switch

Abstract

The application discloses a reclosing switch and relates to the technical field of low-voltage electrical apparatuses. The reclosing switch comprises a control assembly, a middle cover and a short-circuit protection mechanism. The control assembly is used for realizing manual opening and closing control and resetting of the switch. The control assembly comprises a control mechanism, a resetting mechanism and a linkage mechanism. Through the stroke constraint of the energy storage resetting structure of the compression spring in the control assembly and the limiting piece in the mounting groove, the smooth and non-jamming manual opening and closing action is realized, and the stroke is accurately controllable. Meanwhile, through the magnetic attraction linkage design of the magnetic release moving piece and the magnetic release piece, the strong magnetic attraction force generated by the current surge can drive the embedded rod to rotate and break the circuit in an instant when a short circuit occurs. The rotation stroke of the components is strictly limited through the cooperation of the extension plate and the limiting piece, so that the problems of the traditional switch, such as the jamming of manual operation, the incomplete resetting after opening and the easy triggering of circuit misconnection, and the slow response of short-circuit protection and the easy deformation and damage of core components due to excessive rotation are solved.

Description

Technical Field

[0001] This invention relates to the field of low-voltage electrical technology, and in particular to a reclosing switch. Background Technology

[0002] In modern industrial production and civil power distribution, reclosing switches, as key protection and control components of low-voltage power distribution systems, play an indispensable role in circuit on / off control, automatic short-circuit fault disconnection, and reclosing operation after fault clearance. Their working principle is based on mechanical linkage and electromagnetic induction. Circuit closing and opening are achieved through lever transmission of the manual control component. The magnetic attraction force generated by the short-circuit current drives the magnetic tripping mechanism to achieve automatic disconnection under short-circuit fault conditions, ensuring the safe and stable operation of circuits and electrical equipment. Reclosing switches are widely used in industrial power distribution, civil buildings, electrical equipment control, and many other fields, and are crucial components for ensuring the safe and efficient operation of low-voltage power distribution systems.

[0003] Currently, although some reclosing switches with magnetic trip protection exist on the market, there are still significant technical bottlenecks. The manual control components of some products have unreasonable structural designs, lacking precise travel limits and elastic reset structures. This leads to easy jamming during manual opening and closing operations, difficulty in controlling the travel, and incomplete reset after opening, posing a safety hazard of accidental circuit interruption. Some magnetic trip protection mechanisms lack effective limit components, which can easily cause deformation and damage due to excessive rotation of components during short-circuit breaking, shortening the switch's service life. Furthermore, some reclosing switches use screw-fastened connections for the middle cover, requiring specialized tools for disassembly and assembly. This is not conducive to the inspection and maintenance of the internal manual control components and magnetic trip mechanism. At the same time, the arc burn marks generated when the switch breaks a short circuit can easily spread to external components, causing contamination of surrounding components and further increasing maintenance costs and difficulties. Summary of the Invention

[0004] The purpose of this invention is to provide a reclosing switch that solves the technical problems mentioned in the background art, such as manual operation jamming and incomplete reset that easily lead to circuit malfunctions.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a reclosing switch, comprising a control component, a middle cover, and a short-circuit protection mechanism. The control component is used to realize the manual opening and closing control and reset of the switch. The control component includes a control mechanism, a reset mechanism, and a linkage mechanism. The control mechanism is a manual opening and closing operation execution component, used to directly implement the opening and closing operations of the switch. The reset mechanism is used to drive the control mechanism to reset. The linkage mechanism is used to transmit the power of manual operation to realize the opening and closing action. The short-circuit protection mechanism is controlled by electromagnetic characteristics, and realizes rapid tripping protection in the event of a short-circuit fault through the principle of electromagnetic induction, ensuring the safety of the switch and the circuit.

[0006] Preferably, the control mechanism includes a control lever, a connector, and a first rotating shaft; the reset mechanism includes a contact element and a compression spring; and the linkage mechanism includes a stop rod and a connecting plate. The first rotating shaft of the control component passes through the connector. The compression spring is fixedly installed at the bottom of the inner wall of the hand control slot. The top outer wall of the compression spring is fixedly connected to the abutment. The abutment is drivenly connected to the control lever. The connecting plate is rotatably installed inside the mounting slot. The connector is fixedly connected to the control lever. The outer wall of the connector is rotatably provided with a stop rod. The outer wall of the stop rod away from the connector abuts against the connecting plate.

[0007] Preferably, the short-circuit protection mechanism includes a rod, a movable groove, a magnetic deactivation plate, a magnetic trip plate, a second rotating shaft, a magnetic trip U-plate, an extension plate, and a contact plate; The outer wall of the insert rod is provided with several movable slots. Each magnetic release piece is fixedly connected to a corresponding magnetic release piece. Each magnetic release piece is rotatably disposed inside the corresponding movable slot. Several magnetic release U-plates are fixedly disposed on the bottom outer wall of the insert rod. Each magnetic release U-plate corresponds to a movable slot. Each magnetic release U-plate is fixedly disposed below the corresponding movable slot. The short circuit protection mechanism is rotatably disposed inside the middle cover via a second rotating shaft.

[0008] Preferably, the extension plate is fixedly disposed on one side of the outer wall of the insert rod, and each magnetic release U-plate is provided with a copper busbar for output, which is electrically connected to the wiring terminal of the main body. The abutment plate is fixedly disposed on the other side of the outer wall of the insert rod.

[0009] Preferably, the middle cover is assembled and cooperates with the control component and the short-circuit protection mechanism to play the role of limiting the installation of components and isolating and protecting them. The middle cover includes a hand control groove, a shaft groove and a mounting groove. The shaft groove of the middle cover is adapted to the first rotating shaft of the control component. The first rotating shaft is rotatably disposed inside the shaft groove. A limiting member is fixedly disposed inside the mounting groove. The limiting member is used to limit the movement range of the control component.

[0010] Preferably, the hand control slot is formed on the surface of the middle cover, and the position of the mounting slot corresponds to the control component.

[0011] Preferably, it also includes a body, the control lever is disposed on the surface of the body, the middle cover is fitted onto the middle of the body to prevent burn marks from adhering to external components of the switch, and the middle cover and the body are fixedly connected by a snap-fit.

[0012] Preferably, the connecting plate of the control component abuts against the abutting plate of the short-circuit protection mechanism.

[0013] Compared with related technologies, the reclosing switch provided by the present invention has the following beneficial effects: 1. This invention provides a reclosing switch. By controlling the energy storage and reset structure of the compression spring in the control component and the stroke constraint of the limiting component in the mounting slot, the manual opening and closing action is smooth and without jamming, and the stroke is precisely controllable. At the same time, with the magnetic attraction linkage design of the magnetic deactivation plate and the magnetic trip plate, the strong magnetic attraction force generated by the surge of current during a short circuit can instantly drive the rod to rotate and disconnect the circuit. With the cooperation of the extension plate and the limiting component, the rotation stroke of the components is strictly limited. This solves the problems of jamming during manual operation of traditional switches, incomplete reset after opening which easily leads to false circuit connection and disconnection, slow short circuit protection response, and easy deformation and damage of core components due to excessive rotation. It significantly improves the stability of switch operation and the reliability of short circuit protection, and extends the overall service life.

[0014] 2. This invention provides a reclosing switch, which uses a snap-fit ​​design to fix the middle cover to the main body. The middle cover can be quickly disassembled and assembled without additional professional tools, which facilitates the inspection, repair or replacement of internal control components and core components of short-circuit protection mechanism in the later stage. It solves the problems of screw fastening, cumbersome disassembly and assembly, and inconvenient internal component inspection of traditional switches, simplifies the operation and maintenance process, and reduces the difficulty and time cost of maintenance operations.

[0015] 3. This invention provides a reclosing switch with a design where the middle cover fits into the middle of the main body to form a closed isolation barrier. When the switch is short-circuited and disconnected, it can accurately prevent the burn marks generated by the electric arc from contaminating external components, thus avoiding damage to surrounding components due to burn marks. This solves the problem that the burn marks of the electric arc are easy to spread when the switch is short-circuited, resulting in the need for frequent cleaning or replacement of external components. It ensures the cleanliness and integrity of the external structure of the switch and further reduces the overall maintenance cost. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall first-state structure of the present invention; Figure 2 This is a schematic diagram of the overall second-state structure of the present invention; Figure 3 This is a schematic diagram of the internal structure of the present invention; Figure 4 This is a schematic diagram of the cover structure in this invention; Figure 5 For the present invention Figure 4 Enlarged view of the structure at point A in the middle; Figure 6 This is a schematic diagram of the structure of the copper busbar at the outlet of the present invention; Figure 7 For the present invention Figure 6 Enlarged view of the structure at point B in the middle; Figure 8 This is a schematic diagram of the structure at the extension plate of the present invention; Figure 9 This is a schematic diagram of the short-circuit protection mechanism of the present invention.

[0017] In the diagram: 1. Main body; 2. Control component; 201. Control lever; 202. Connector; 203. First rotating shaft; 204. Abutment; 205. Compression spring; 206. Abutment rod; 207. Connecting plate; 3. Middle cover; 301. Hand control slot; 302. Shaft slot; 303. Mounting slot; 4. Short circuit protection mechanism; 401. Insert rod; 402. Movable slot; 403. Magnetic release plate; 404. Magnetic release plate; 405. Second rotating shaft; 406. Magnetic release U-plate; 407. Extension plate; 408. Abutment plate; 5. Outgoing copper busbar; 6. Limiting component. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0019] Example 1: Please see Figures 1-7 The present invention provides a technical solution: a reclosing switch, including a control component 2, a middle cover 3, and a short-circuit protection mechanism 4. The control component 2 is used to realize the manual opening and closing control and reset of the switch. The control component 2 includes a control mechanism, a reset mechanism, and a linkage mechanism. The control mechanism is the operation execution component for manual opening and closing, and is used to directly implement the opening and closing operation of the switch. The reset mechanism is used to drive the control mechanism to reset. The linkage mechanism is used to transmit the power of manual operation to realize the opening and closing action. The short-circuit protection mechanism 4 is controlled by electromagnetic characteristics and realizes rapid tripping protection in the event of a short-circuit fault through the principle of electromagnetic induction, so as to ensure the safety of the switch and the circuit. The control mechanism includes a control lever 201, a connector 202, and a first rotating shaft 203; the reset mechanism includes a contact member 204 and a compression spring 205; and the linkage mechanism includes a stop rod 206 and a connecting plate 207. The first rotating shaft 203 of the control component 2 passes through the connector 202. The compression spring 205 is fixedly installed at the bottom of the inner wall of the hand control groove 301. The top outer wall of the compression spring 205 is fixedly connected to the abutment 204. The abutment 204 is connected to the control lever 201. The connecting plate 207 is rotatably installed inside the mounting groove 303. The connector 202 is fixedly connected to the control lever 201. The outer wall of the connector 202 is rotatably provided with a stop rod 206. The outer wall of the stop rod 206 away from the connector 202 abuts against the connecting plate 207. The connecting plate 207 of the control component 2 abuts against the abutting plate 408 of the short-circuit protection mechanism 4; In this implementation scheme, during manual closing operation, the operator presses down on the control lever 201, which causes the connecting piece 202 to rotate synchronously around the first rotating shaft 203. The connecting piece 202 then pushes the abutment rod 206 towards the connecting plate 207. The abutment rod 206 pushes the connecting plate 207 to rotate within the mounting groove 303 until the connecting plate 207 is tightly abutted against the abutment plate 408 of the short-circuit protection mechanism 4, thus switching the short-circuit protection mechanism 4 to the closing and conducting state. At the same time, the control lever 201... 01 will drive the contact element 204 to compress the compression spring 205, completing the closing energy storage action; when performing manual opening operation, the operator releases the control lever 201, the compression spring 205 releases elastic potential energy to drive the contact element 204 to reset upward, thereby driving the control lever 201 and the connecting element 202 to rotate in opposite directions, the connecting element 202 pulls the abutment rod 206 back, the abutment rod 206 drives the connecting plate 207 to disengage from the abutment plate 408, releasing the limit constraint on the short circuit protection mechanism 4, thereby realizing circuit disconnection. The shaft groove 302 provides a stable rotation support point for the first rotating shaft 203, ensuring smooth and unimpeded rotation of the control component 2 during closing and opening operations. The manual control groove 301 provides operating space for the control lever 201, facilitating operation by pressing or resetting the control lever 201. The mounting groove 303 provides sufficient travel space for the rotation of the connecting plate 207, preventing interference between components. The limiter 6 can prevent excessive rotation of the connecting plate 207 during closing, preventing damage to the short-circuit protection mechanism 4 due to excessive force. During opening, it can limit the reset travel of the connecting plate 207, ensuring a complete opening action. This effectively solves the problems of jamming, difficulty in controlling the travel, incomplete reset after opening, and easy circuit malfunction caused by the lack of precise travel limit and elastic reset structure in traditional manual switch control components through the energy storage reset structure of the compression spring and the travel constraint of the limiter. This significantly improves the convenience, stability, and safety of manual operation.

[0020] Example 2: Please see Figures 8-9 As shown, based on Embodiment 1, the present invention provides a technical solution: The short circuit protection mechanism 4 includes a rod 401, a movable groove 402, a magnetic release plate 403, a magnetic trip plate 404, a second rotating shaft 405, a magnetic trip U-plate 406, an extension plate 407, and an abutment plate 408. The outer wall of the insert rod 401 is provided with several movable slots 402. Each magnetic release piece 403 is fixedly connected to a corresponding magnetic release piece 404. Each magnetic release piece 403 is rotatably disposed inside the corresponding movable slot 402. Several magnetic release U-plates 406 are fixedly disposed on the bottom outer wall of the insert rod 401. Each magnetic release U-plate 406 corresponds to a movable slot 402. Each magnetic release U-plate 406 is fixedly disposed below the corresponding movable slot 402. The short circuit protection mechanism 4 is rotatably disposed inside the middle cover 3 through the second rotating shaft 405. The extension plate 407 is fixedly installed on one side of the outer wall of the insert rod 401. Each copper busbar 5 is correspondingly installed inside the magnetic release U plate 406. The copper busbar 5 is electrically connected to the wiring terminal of the main body 1. The abutment plate 408 is fixedly installed on the other side of the outer wall of the insert rod 401. In this embodiment, under normal closing conditions, the connecting plate 207 of the control component 2 is in close contact with the abutment plate 408, restricting the insertion rod 401 from rotating around the second rotating shaft 405. At this time, the magnetic deactivation piece 403 and the magnetic trip piece 404 are in a separated state, the outgoing copper busbar 5 and the magnetic trip plate 406 remain in contact, and the circuit is in a conductive state. When a short circuit fault occurs in the circuit, the instantaneous surge of short circuit current in the line will cause a strong magnetic attraction force between the magnetic deactivation piece 403 and the magnetic trip piece 404. The magnetic deactivation piece 403 will then rotate rapidly in the movable slot 402, driving the insertion rod 401. The rod 401 rotates synchronously around the second pivot 405, causing the contact plate 408 to disengage from the connecting plate 207 instantly. At the same time, the magnetic trip plate 406 is displaced from the outgoing copper busbar 5, cutting off the circuit and realizing automatic short-circuit trip protection. During this process, the extension plate 407 rotates with the rod 401 and abuts against the limiting piece 6, limiting the rotation stroke of the rod 401 and preventing damage to components such as the magnetic trip piece 403 and the magnetic trip piece 404 due to excessive tripping. After the short-circuit fault is cleared, the operator can press the control lever 201 again to reset the mechanism and complete the reclosing operation. This design achieves rapid response and instantaneous disconnection during short circuits through the magnetic attraction linkage structure of the magnetic deactivation plate and the magnetic tripping plate. Combined with the travel limitation function of the extension plate and the limiting component, it solves the problem that traditional magnetic tripping protection mechanisms do not have effective limiting components, which leads to excessive rotation and deformation of components during short circuit disconnection and slow short circuit protection response. This significantly improves the reliability of switch short circuit protection and extends the service life of core components and the switch as a whole.

[0021] Example 3: Please see Figures 1-5 As shown, based on Embodiment 1, the present invention provides a technical solution: The middle cover 3 is assembled and cooperates with the control component 2 and the short circuit protection mechanism 4 to play the role of limiting the installation of components and isolating and protecting them. The middle cover 3 includes a hand control groove 301, a shaft groove 302 and a mounting groove 303. The shaft groove 302 of the middle cover 3 is adapted to the first rotating shaft 203 of the control component 2. The first rotating shaft 203 is rotatably disposed inside the shaft groove 302. The limiting member 6 is fixedly disposed inside the mounting groove 303. The limiting member 6 is used to limit the movement range of the control component 2. The hand control slot 301 is formed on the surface of the middle cover 3, and the position of the mounting slot 303 corresponds to the control component 2; The middle cover 3 is fitted onto the middle part of the body 1 to prevent burn marks from adhering to the external parts of the switch. The middle cover 3 and the body 1 are fixedly connected by a snap-fit. In this implementation scheme, the middle cover 3 is fixed to the main body 1 via a snap-fit ​​structure, allowing for quick assembly and disassembly without the need for specialized tools. This facilitates subsequent inspection, repair, or replacement of components such as the control lever 201 and connector 202 of the internal control assembly 2, as well as core components such as the magnetic deactivation plate 403 and insert rod 401 of the short-circuit protection mechanism 4. Simultaneously, the middle cover 3, covering the center of the main body 1, forms a closed isolation barrier. When a short circuit occurs and an arc is generated, it effectively prevents the arc-induced burn marks from spreading to external components, avoiding damage to surrounding components due to burn marks. This design solves the problems of traditional reclosing switch middle covers, which are secured with screws, cumbersome to disassemble and assemble, inconvenient for maintenance, and prone to spreading arc marks to external components during short circuits, causing contamination and increasing maintenance costs. It simplifies the operation and maintenance process, reduces the difficulty and time cost of maintenance operations, ensures the cleanliness and integrity of the switch's external structure, further reduces the frequency of cleaning and replacement of external components, and lowers overall maintenance costs.

[0022] By utilizing the energy storage and reset structure of the compression spring in the control component, combined with the travel constraint of the limit component in the mounting slot, the manual opening and closing actions are ensured to be smooth and without jamming, with precise and controllable travel. This also solves the problems of jamming during manual operation of traditional switches and incomplete reset after opening, which can easily lead to circuit malfunctions. Simultaneously, thanks to the magnetic linkage design of the magnetic deactivation plate and the magnetic trip plate, the strong magnetic force generated by the surge in current during a short circuit can instantly drive the rod to rotate and disconnect the circuit. The cooperation between the extension plate and the limit component strictly limits the rotational travel of the components, effectively solving the problems of slow short-circuit protection response and easy deformation and damage of core components due to excessive rotation in traditional switches, significantly extending the overall service life of the switch. Furthermore, the middle cover and the main body are fixedly connected by a snap-fit ​​mechanism, allowing for quick disassembly and assembly without specialized tools, facilitating the inspection and maintenance of the internal control components and the core components of the short-circuit protection mechanism. The closed isolation barrier formed by the middle cover covering the middle of the main body also prevents arc burn marks during short-circuit disconnection from contaminating external components, avoiding contamination of surrounding components and significantly reducing the difficulty and overall cost of maintenance operations.

[0023] Working principle: The operator presses the control lever 201 on the surface of the main body 1 through the operating space reserved in the hand control groove 301 on the surface of the middle cover 3, driving the connecting piece 202 to rotate around the first rotating shaft 203. Thanks to the stable support provided by the shaft groove 302 of the middle cover 3 for the first rotating shaft 203, the rotation process is smooth without deviation or jamming. The connecting piece 202 simultaneously pushes the abutment rod 206 to push the connecting plate 207, causing the connecting plate 207 to rotate in the mounting groove 303 until it is tightly abutted against the abutment plate 408 of the short circuit protection mechanism 4, thereby pushing the insert rod 401 to rotate around the second rotating shaft 405 to the closing position. During this process, the limiting member 6 in the mounting groove 303 will limit the excessive rotation of the connecting plate 207 to prevent the short circuit protection mechanism 4 from being damaged due to excessive force; at the same time, the control lever 201 drives the abutment member 204 to compress the compression spring 205 to complete the energy storage, laying the foundation for subsequent rapid reset, effectively solving the problems of jamming and difficult stroke control in traditional manual operation of switches. After the circuit is closed, the magnetic trip plate 406 and the outgoing copper busbar 5 are attached to conduct the circuit. The middle cover 3 covers the middle of the body 1 to form a closed isolation barrier, which can prevent the arc burn marks that may be generated later from spreading outward and protect the external components from contamination.

[0024] In the closed state, the rebound force of the compression spring 205 continuously maintains the stable position of the control lever 201, and the connecting plate 207 is always in close contact with the abutment plate 408, restricting the free rotation of the insert rod 401 and ensuring stable circuit conduction; at this time, the magnetic release plate 403 and the magnetic trip plate 404 are in a separated state, and the current is stably transmitted through the outgoing copper busbar 5 and the magnetic trip plate 406, avoiding the hidden danger of circuit malfunction caused by incomplete reset of traditional switches.

[0025] When a short circuit fault occurs in the circuit, the instantaneous surge of current in the line will generate a strong magnetic attraction between the magnetic deactivation plate 403 and the magnetic trip plate 404, driving the magnetic deactivation plate 403 to rotate rapidly in the movable slot 402, and simultaneously causing the insert rod 401 to rotate instantaneously around the second rotating shaft 405. The insert rod 401 then drives the abutment plate 408 to disengage from the connecting plate 207, and at the same time drives the magnetic trip plate 406 to separate from the outgoing copper busbar 5, realizing rapid circuit disconnection and solving the problem of slow response of traditional switch short circuit protection. At the same time, the extension plate 407 on one side of the insert rod 401 rotates with it and precisely abuts against the limiting member 6, strictly limiting the rotation stroke of the insert rod 401, avoiding deformation and damage to core components such as the magnetic deactivation plate 403 and the magnetic trip plate 404 due to excessive rotation, and significantly extending the service life of the switch.

[0026] After the circuit breaker is tripped or when maintenance is required, the middle cover 3 and the main body 1 are fixedly connected by a snap-fit ​​mechanism, allowing for quick disassembly and assembly without the need for professional tools. This facilitates the operator's inspection, repair, or replacement of components such as the control lever 201 and connector 202 of the control component 2, as well as core components such as the magnetic release plate 403 and insert rod 401 of the short-circuit protection mechanism 4. This completely solves the problems of cumbersome disassembly and assembly and inconvenient maintenance of the middle cover in traditional switches. After the short-circuit fault is cleared or maintenance is completed, the operator presses the control lever 201 again. The compression spring 205 releases its elastic potential energy to drive the contact piece 204, control lever 201, and connector 202 to quickly reset in the reverse direction, causing the short-circuit protection mechanism 4 to return to the closed state. The magnetic release U-plate 406 re-attaches and conducts with the outgoing copper busbar 5, completing the efficient reclosing operation. The entire process takes into account the ease of operation, the reliability of protection, and the convenience of maintenance.

[0027] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0028] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A reclosing switch, characterized in that: The system includes a control component (2), a middle cover (3), and a short-circuit protection mechanism (4). The control component (2) is used to realize the manual opening and closing control and reset of the switch. The control component (2) includes a control mechanism, a reset mechanism, and a linkage mechanism. The control mechanism is the operation execution component for manual opening and closing, and is used to directly implement the opening and closing operation of the switch. The reset mechanism is used to drive the control mechanism to reset. The linkage mechanism is used to transmit the power of manual operation to realize the opening and closing action. The short-circuit protection mechanism (4) is controlled by electromagnetic characteristics and realizes rapid tripping protection in the event of a short circuit fault through the principle of electromagnetic induction, so as to ensure the safety of the switch and the circuit.

2. A reclosing switch according to claim 1, characterized in that: The control mechanism includes a control lever (201), a connector (202), and a first rotating shaft (203); the reset mechanism includes a contact element (204) and a compression spring (205); and the linkage mechanism includes a stop rod (206) and a connecting plate (207). The first rotating shaft (203) of the control component (2) passes through the connector (202). The compression spring (205) is fixedly installed at the bottom of the inner wall of the hand control groove (301). The top outer wall of the compression spring (205) is fixedly connected to the abutment (204). The abutment (204) is connected to the control lever (201) in a transmission manner. The connecting plate (207) is rotatably installed inside the mounting groove (303). The connector (202) is fixedly connected to the control lever (201). The outer wall of the connector (202) is rotatably provided with a stop rod (206). The outer wall of the stop rod (206) away from the connector (202) abuts against the connecting plate (207).

3. A reclosing switch according to claim 1 or 2, characterized in that: The short-circuit protection mechanism (4) includes a rod (401), a movable groove (402), a magnetic release plate (403), a magnetic release plate (404), a second rotating shaft (405), a magnetic release U-plate (406), an extension plate (407), and an abutment plate (408). The outer wall of the insert rod (401) is provided with a plurality of movable slots (402). Each magnetic release piece (403) is fixedly connected to a corresponding magnetic release piece (404). Each magnetic release piece (403) is rotatably disposed inside the corresponding movable slot (402). The bottom outer wall of the insert rod (401) is fixedly provided with a plurality of magnetic release U plates (406). The magnetic release U plates (406) correspond one-to-one with the movable slots (402). Each magnetic release U plate (406) is fixedly disposed below the corresponding movable slot (402). The short circuit protection mechanism (4) is rotatably disposed inside the middle cover (3) through a second rotating shaft (405).

4. A reclosing switch according to claim 3, characterized in that: The extension plate (407) is fixedly installed on one side of the outer wall of the insert rod (401). Each magnetic release U plate (406) is provided with a copper busbar (5) inside. The copper busbar (5) is electrically connected to the wiring terminal of the body (1). The abutment plate (408) is fixedly installed on the other side of the outer wall of the insert rod (401).

5. A reclosing switch according to claim 1 or 2, characterized in that: The middle cover (3) is assembled and cooperated with the control component (2) and the short circuit protection mechanism (4) to play the role of limiting the installation of components and isolating and protecting them. The middle cover (3) includes a hand control groove (301), a shaft groove (302) and a mounting groove (303). The shaft groove (302) of the middle cover (3) is adapted to the first rotating shaft (203) of the control component (2). The first rotating shaft (203) is rotatably disposed inside the shaft groove (302). A limiting member (6) is fixedly disposed inside the mounting groove (303). The limiting member (6) is used to limit the movement range of the control component (2).

6. A reclosing switch according to claim 5, characterized in that: The hand control slot (301) is formed on the surface of the middle cover (3), and the position of the mounting slot (303) corresponds to the control component (2).

7. A reclosing switch according to claim 2, characterized in that: It also includes a body (1), the control lever (201) is disposed on the surface of the body (1), the middle cover (3) is covered in the middle of the body (1) to prevent the burn marks from staining the external parts of the switch, and the middle cover (3) and the body (1) are fixedly connected by a snap-fit.

8. A reclosing switch according to claim 1 or 2, characterized in that: The connecting plate (207) of the control component (2) abuts against the abutting plate (408) of the short-circuit protection mechanism (4).

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