A circuit breaker

Abstract

The utility model relates to a circuit breaker, including casing, arc extinguishing system and operating mechanism. Operating mechanism is electromagnetic opening and closing mechanism, and has integrated short circuit opening and closing recognition structure and mechanical locking device. Electromagnetic opening and closing mechanism adopts electromagnetic direct drive, and short circuit induction coil and trip coil are horizontal and parallel and share magnetic circuit component, and the structure is compact. Short circuit opening and closing recognition structure is through the trigger portion of trip lever tail and the switch on the circuit board cooperation, and mechanically triggers short circuit signal and reports. Mechanical locking device is through the locking piece of movable in locking position physical blocking closing mechanism movement, prevents accidental closing. The utility model integrates efficient drive, accurate fault identification and absolute safety interlock, has compact structure, fast action, strong breaking capacity, high reliability, good security, intelligent degree higher advantage.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical technology, and in particular to a circuit breaker, which is an intelligent circuit breaker with remote control, status monitoring, short circuit identification and mechanical interlocking functions. Background Technology

[0002] Circuit breakers are important circuit protection devices used to automatically disconnect circuits when faults such as overloads or short circuits occur. With the development of Internet of Things (IoT) technology, smart circuit breakers have emerged, featuring functions such as remote opening and closing, power monitoring, and fault alarms, greatly improving the convenience and intelligence of power management.

[0003] However, existing intelligent circuit breakers still have some technical pain points: First, traditional opening and closing mechanisms mostly use gear transmission, which is complex in structure, occupies a lot of space, and has a slow operating speed, affecting the breaking capacity and not conducive to miniaturization design; Second, the transient characteristics of short-circuit opening current are obvious, and the control board has difficulty reliably collecting and distinguishing between short-circuit opening and manual opening, resulting in the inability to report short-circuit faults in a timely manner, which poses a safety hazard; Third, the remote closing function of intelligent circuit breakers may be accidentally closed due to misoperation or control board failure during equipment maintenance, which seriously threatens the safety of on-site personnel. Existing technology lacks a simple, reliable, and completely electrical-independent physical anti-closing mechanism.

[0004] Therefore, there is an urgent need for an intelligent circuit breaker solution that integrates efficient drive, accurate fault identification, and absolute safety interlocking. Utility Model Content

[0005] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a circuit breaker that integrates an electromagnetic direct-drive opening and closing mechanism, a short-circuit opening identification structure, and a mechanical locking device. This circuit breaker has advantages such as compact structure, fast breaking speed, accurate identification and reporting of short-circuit faults, and absolutely reliable safety measures to prevent accidental closing.

[0006] The above-mentioned utility model objective is achieved through the following technical solution:

[0007] A circuit breaker includes a housing, an arc extinguishing system disposed within the housing, and an operating mechanism, wherein the operating mechanism is an electromagnetic opening and closing mechanism and integrates a short-circuit opening identification structure and a mechanical locking device.

[0008] The electromagnetic opening and closing mechanism includes a base, a handle, a handle spring, an opening and closing operation mechanism, a trip lever, a trip spring, an electromagnetic drive module, an instantaneous spring, a short-circuit induction coil, and a data acquisition and control circuit board.

[0009] The opening and closing operation mechanism includes a moving contact, a latch, a moving contact spring, a latch spring, a large U-shaped component, and a stationary contact plate; the electromagnetic drive module includes a trip coil, a stationary iron core, a moving iron core assembly, a push rod, a reset spring, and a magnetic yoke.

[0010] The short-circuit tripping identification structure includes a triggering part and a signal triggering switch. The triggering part is located at the tail of the tripping lever of the tripping and closing operation mechanism, and the signal triggering switch is located on the acquisition and control circuit board and corresponds to the position of the triggering part.

[0011] When a short circuit occurs, the trip lever is pushed and rotated by the push rod, which drives the trigger part to move and triggers the signal trigger switch, generating a short circuit trip indication signal. The acquisition and control circuit board is configured to receive and upload this signal.

[0012] The short-circuit induction coil and the trip coil are arranged horizontally side by side and share the top rod, stationary iron core and magnetic yoke.

[0013] As a further technical solution of this utility model: the moving iron core assembly includes a moving iron core one and a moving iron core two.

[0014] As a further technical solution of this utility model: the instantaneous spring is located behind the trip coil, and its elastic coefficient is configured according to the rated current specification of the circuit breaker.

[0015] As a further technical solution of this utility model: the latch is installed in a specific gap of the moving contact by rotation, and its vertical direction is constrained after it is installed in place.

[0016] As a further technical solution of this utility model: the signal trigger switch is a micro switch, a reed switch or an optocoupler switch.

[0017] As a further technical solution of this utility model: the acquisition and control circuit board is connected to a communication module for remotely uploading one or more of the following information: closing status, opening status, short-circuit opening event, and locking device status.

[0018] As a further technical solution of this utility model: the mechanical locking device includes a locking member, which is movably disposed on the base or a component connected to the base, and has an unlocking position that allows closing and a locking position that prevents closing;

[0019] When the locking member is in the locked position, the body or extension of the locking member intervenes in the movement path of the latch in the opening and closing operation mechanism, physically blocking the movement of the latch, thereby preventing the circuit breaker from closing.

[0020] As a further technical solution of this utility model: the movement mode of the locking member is linear sliding, rotation around an axis or tossing; the locking device also includes a positioning structure for reliably holding the locking member in the locked position and / or unlocked position.

[0021] As a further technical solution of this utility model: the locking device also includes an auxiliary switch. When the locking member moves to the locking position, the auxiliary switch is triggered, and the acquisition and control circuit board acquires the signal and can report the locking status.

[0022] As a further technical solution of this utility model: In the open state, the handle presses a trip spring to make it position below the top rod, the trip spring is installed on the upper end of the trip lever and applies a biasing force to the trip lever; when the circuit is closed, the handle rotates to release the pressure on the trip spring, and the trip spring spring bounces up and moves to the front end of the top rod.

[0023] In summary, compared with the prior art, the present invention has at least one of the following beneficial technical effects:

[0024] 1. High Integration and Compactness: The circuit breaker innovatively integrates multiple functions such as electromagnetic drive, short-circuit induction, status recognition, and mechanical locking into a single mechanism. Electromagnetic direct drive replaces gear transmission, and the short-circuit induction coil and trip coil are horizontally parallel and share magnetic circuit components (push rod, stationary iron core, and magnetic yoke), greatly saving internal space and making the product structure very compact. This facilitates miniaturization and direct replacement of traditional products.

[0025] 2. High performance and high reliability: The electromagnetic direct drive provides a fast response speed, significantly improving the closing and opening speeds and enhancing short-circuit breaking capacity. The mechanical short-circuit identification structure and locking device do not rely on complex electronic circuits and software algorithms for reliability, offering strong anti-interference capabilities and absolutely reliable operation.

[0026] 3. Enhanced Intelligence and Safety: It can accurately distinguish between short-circuit tripping and normal operation tripping, and promptly report short-circuit fault events remotely, reminding maintenance personnel to perform repairs and avoiding the risks of unknowingly restoring power. The mechanical locking device provides the highest level of safety during maintenance, fundamentally preventing accidental closing due to remote misoperation or control system failure, greatly ensuring personnel safety.

[0027] 4. Cost advantages: Shared components (such as magnetic circuit systems) reduce the number and types of parts, simplifying assembly processes. Modular design also facilitates production and maintenance, reducing overall costs. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the internal structure of this utility model.

[0029] Reference numerals: 1. Base; 2. Handle; 3. Handle spring; 4. Moving contact; 5. Lock; 6. Tripping lever; 7. Tripping spring; 8. Tripping coil; 9. Stationary iron core; 10. Moving iron core one; 11. Moving iron core two; 12. Push rod; 13. Reset spring; 14. Instantaneous spring; 15. Short-circuit induction coil; 16. Magnetic yoke; 17. Data acquisition and control circuit board; 18. Large U-shaped component; 19. Moving contact spring; 20. Locking spring; 21. Stationary contact plate; 22. Triggering part; 23. Signal trigger switch; 24. Locking component; 25. Arc extinguishing system. Detailed Implementation

[0030] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0031] In the description of this application, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0033] Example 1:

[0034] Reference Figure 1 The present invention discloses a circuit breaker, which includes a housing, an arc extinguishing system 25 disposed within the housing, and an operating mechanism. The operating mechanism is an electromagnetic opening and closing mechanism, and integrates a short-circuit opening identification structure and a mechanical locking device.

[0035] The electromagnetic opening and closing mechanism includes a base 1, a handle 2, a handle spring 3, an opening and closing operating mechanism, a trip lever 6, a trip spring 7, an electromagnetic drive module, an instantaneous spring 14, a short-circuit induction coil 15, and a data acquisition and control circuit board 17; the opening and closing operating mechanism includes a moving contact 4, a latch 5, a moving contact spring 19, a latch spring 20, a large U-shaped part 18, and a stationary contact plate 21; the electromagnetic drive module includes a trip coil 8, a stationary iron core 9, a moving iron core assembly, a push rod 12, a reset spring 13, and a magnetic yoke 16.

[0036] The short-circuit tripping identification structure includes a triggering part 22 and a signal triggering switch 23. The triggering part 22 is located at the tail of the tripping lever 6 of the tripping and closing operation mechanism. The signal triggering switch 23 is located on the acquisition and control circuit board 17 and corresponds to the position of the triggering part 22. When a short-circuit tripping occurs, the tripping lever 6 is pushed and rotated by the push rod 12, which drives the triggering part 22 to move and triggers the signal triggering switch 23, generating a short-circuit tripping indication signal. The acquisition and control circuit board 17 is configured to receive and upload this signal.

[0037] The signal trigger switch 23 is a microswitch, reed switch, or optocoupler sensor; in this embodiment, a microswitch is preferred. The trigger part 22 is a protrusion, boss, or lever formed at the tail of the trip lever 6. The acquisition and control circuit board 17 is connected to a communication module for remotely reporting the short-circuit trip indication signal. The acquisition and control circuit board 17 is also connected to a local indicating device for providing a local alarm indication upon receiving the short-circuit trip indication signal.

[0038] The tail of the trip lever 6 is machined to form a protrusion as a trigger part 22. A micro switch is installed on the acquisition and control circuit board 17 as a signal trigger switch 23. Its installation position ensures that when the trip lever 6 is in the standby position before the circuit breaker is opened, the contact of the micro switch is not pressed. When a short circuit occurs and the trip lever 6 is pushed by the push rod 12 to rotate into place, the protrusion at its tail just presses against the contact of the micro switch.

[0039] Working process: During normal tripping (manual), the trip lever 6 may not move or may move in a different way, and the protrusion at its tail will not trigger the micro switch.

[0040] When a short circuit occurs, the short-circuit induction coil 15 generates a magnetic field, driving the moving iron core assembly to eject the push rod 12 to the right. The push rod 12 pushes the trip lever 6 to rotate counterclockwise around its fulcrum. The rotation of the trip lever 6 performs a mechanical tripping action on the one hand, and drives the protrusion at its tail to move on the other. During the movement, the protrusion presses the contact of the microswitch, causing the state of the microswitch to change (e.g., from normally open to closed), thereby sending an electrical signal to the acquisition and control circuit board 17.

[0041] After detecting the signal, the acquisition and control circuit board 17 identifies it as a "short circuit trip" event. The acquisition and control circuit board 17 can be connected to a communication module via its interface. Figure 1 (Not fully shown in the image), the system sends event information to a remote server or user's mobile app via a wireless network. Simultaneously, it can also drive the onboard LED indicator to flash red, providing a local alarm. In this way, users can clearly and accurately determine that the tripping was caused by a short circuit, allowing for timely maintenance.

[0042] The mechanical locking device includes a locking element 24, which is movably mounted on the base 1 or a component connected to the base 1. It has an unlocked position that allows closing and a locked position that prevents closing. When the locking element 24 is in the locked position, the body or extension of the locking element 24 intervenes in the movement path of the latch 5 in the opening and closing operation mechanism, physically blocking the movement of the latch 5, thereby preventing the circuit breaker from closing. The short-circuit induction coil 15 and the trip coil 8 are arranged horizontally side by side and share the top rod 12, the stationary iron core 9 and the magnetic yoke 16.

[0043] In this embodiment, the mechanical locking position is located above the unlocking position. Pulling or flipping the locking member 24 upwards switches it from the unlocking position to the locking position. When in the locked position, the locking member 24's body or extension abuts against the lower end of the latch 5. The locking member 24 can move by linear sliding, rotating around an axis, or moving back and forth. In this embodiment, the locking member 24 moves by linear sliding.

[0044] It also includes a positioning structure for reliably holding the locking element 24 in the locked and / or unlocked position; the positioning structure is a ratchet structure, a slot and protrusion engagement structure, or a resilient pin structure. It also includes a status indicator for displaying whether the locking device is currently in a locked or unlocked state. It also includes an auxiliary switch linked to the locking element 24; when the locking element 24 is in the locked position, the auxiliary switch is triggered to send a locked status signal to the circuit breaker's acquisition and control circuit board 17.

[0045] The locking element 24 is a slider, which is installed through the guide groove on the base 1 and can slide up and down along the guide groove. The locking element 24 is located at the bottom, and its top end is below the movement range of the lower end of the latch 5, so it will not interfere with the normal movement of the latch 5, and the circuit breaker can be closed.

[0046] When line maintenance is required, the operator pulls the locking element 24 upwards to the locked position. A positioning structure is provided along the sliding path (e.g., a spring and steel ball are installed in the base 1, and a corresponding recess is machined on the locking element 24). When the sliding element reaches the top, the steel ball engages in the recess, providing a tactile feel and holding it in the locked position. Simultaneously, the indicator in the status window changes from "OPEN" to "LOCKED".

[0047] In the locked position, the top protrusion of the locking element 24 moves upward and enters the expected movement space at the lower end of the latch 5. At this time, if someone turns the handle 2 to attempt to close the circuit, the handle 2 will cause the latch 5 to rotate downward, but the lower end of the latch 5 will immediately hit or block the top of the waiting locking element 24, preventing it from moving further downward. Because the movement of the latch 5 is blocked, the entire closing process cannot be completed, and the circuit breaker remains in the open state, thus ensuring safety.

[0048] The locking element 24 can also be linked to a micro switch as an auxiliary switch. When the locking element 24 slides to the top (locked position), it will press down the micro switch, and the switch signal will be sent to the acquisition and control circuit board 17. The acquisition and control circuit board 17 can then report this "mechanical lock" state through the communication module.

[0049] The moving iron core assembly includes moving iron core one 10 and moving iron core two 11. A momentary spring 14 is located behind the trip coil 8, and its elastic coefficient is configured according to the rated current specification of the circuit breaker. The latch 5 is installed in a specific gap in the moving contact 4 by rotation, and its vertical direction is constrained after installation. The signal trigger switch 23 is a micro switch, reed switch, or optocoupler switch; in this embodiment, a micro switch is preferred.

[0050] The acquisition and control circuit board 17 is connected to a communication module for remotely uploading one or more information items, including the closing status, opening status, short-circuit opening event, and locking device status. The locking member 24 can move by linear sliding, rotation around an axis, or tossing. In this embodiment, linear sliding is preferred. The locking device also includes a positioning structure for reliably holding the locking member 24 in the locked position and / or unlocked position.

[0051] The locking device also includes an auxiliary switch. When the locking member 24 moves to the locked position, the auxiliary switch is triggered, and the control circuit board 17 collects the signal and can report the locking status. In the open state, the handle 2 presses a trip spring 7 so that it is located below the top rod 12. The trip spring 7 is installed on the upper end of the trip lever 6 and applies a biasing force to the trip lever 6. When the circuit is closed, the handle 2 rotates to release the pressure on the trip spring 7, and the trip spring 7 springs up and moves to the front end of the top rod 12.

[0052] The acquisition and control circuit board 17 is used to receive control signals, process the signals of the short-circuit induction coil 15, and output drive voltage to the trip coil 8. After the trip coil 8 is energized, it generates a magnetic field, which drives the moving iron core assembly to overcome the elastic force of the reset spring 13 and attract the stationary iron core 9, thereby pushing the push rod 12 to pop out. When closing, the push rod 12 pops out and pushes the handle 2 or the corresponding part of the opening and closing operation mechanism to move, completing the closing action. When opening, the push rod 12 pops out and pushes the trip spring 7 that is already at its front end, thereby driving the trip lever 6 to rotate. The tail of the trip lever 6 pushes the opening and closing operation mechanism to unlock, realizing the trip opening.

[0053] The core of the intelligent circuit breaker in this embodiment lies in the integration of an electromagnetic opening and closing mechanism, a short-circuit identification structure, and a mechanical locking device.

[0054] The electromagnetic opening and closing mechanism constitutes the main operating body, with the base 1 and cover (not fully shown in the figure) forming the outer shell. The handle 2 is hinged to the shell. The opening and closing operating mechanism includes a moving contact 4, a latch 5, a large U-shaped part 18, a moving contact spring 19, a latch spring 20, and a stationary contact plate 21. The moving contact 4 cooperates with the stationary contact plate 21 to switch the main circuit on and off. The latch 5 is installed by rotating and locking into the gap of the moving contact 4 to prevent it from shaking up and down.

[0055] The electromagnetic drive module includes a trip coil 8, a stationary iron core 9, moving iron core assemblies (moving iron core one 10, moving iron core two 11), a push rod 12, a reset spring 13, and a magnetic yoke 16. A short-circuit induction coil 15 is installed horizontally adjacent to the trip coil 8. A data acquisition and control circuit board 17 is fixedly installed within the mechanism, electrically connected to the trip coil 8 and the short-circuit induction coil 15, and connected to a communication module (such as an NB-IoT module) and a local status indicator (such as an LED). An instantaneous spring 14, selected according to specifications, is located behind the trip coil 8. A trip spring 7 is installed on the upper end of the trip lever 6 and applies a bias force to it. When the circuit is opened, the handle 2 presses down the trip spring 7, positioning it below the push rod 12.

[0056] Short-circuit tripping identification structure: A protrusion is fixedly installed at the tail of the trip lever 6 as a trigger part 22. A micro switch is installed at the corresponding position on the acquisition and control circuit board 17 as a signal trigger switch 23. When a short circuit occurs, the push rod 12 pops out under the short-circuit induction drive, pushing the trip lever 6 to rotate and perform tripping. The trigger part 22 at its tail moves with the lever and presses the micro switch, generating a signal sent to the acquisition and control circuit board 17. The acquisition and control circuit board 17 reports the "short-circuit tripping" event through the communication module and can drive the indicator light alarm.

[0057] Mechanical locking device: A slider-type locking element 24 is mounted via a guide groove on the base 1 and can slide up and down. A spring-loaded ball positioning structure (not detailed in the figure) is present along the sliding path. The locking element 24 is in the unlocked position when it is in the lower position. When maintenance is required, it is pushed upwards to the locked position. At this time, the top protrusion of the locking element 24 precisely enters the expected swing space at the lower end of the latch 5. If an attempt is made to close the circuit at this time (locally or remotely), the downward movement of the latch 5 will be blocked by the locking element 24, preventing the closing action from being completed. An auxiliary switch (another microswitch can be used, not separately shown in the figure) can be set to be triggered when the locking element 24 is in the locked position. The acquisition and control circuit board 17 can acquire this signal and report the "mechanical locking enabled" status.

[0058] Brief description of the working principle of this utility model:

[0059] Closing (local / remote): Upon receiving the closing signal, the acquisition and control circuit board 17 supplies power to the trip coil 8. The moving iron core 10 and the moving iron core 2 11 attract each other, pushing the push rod 12 out. The push rod 12 pushes the handle 2 (or the corresponding part of the mechanism), overcoming the spring force and driving the mechanism to complete the closing.

[0060] Circuit breaker tripping (electric / manual): The control circuit board 17 receives the tripping signal and supplies power to the trip coil 8, causing the push rod 12 to pop out. At this time, the trip spring 7 has popped out in front of the push rod 12. The push rod 12 pushes the trip spring 7 to drive the trip lever 6 to rotate. The tail of the trip lever 6 moves the latch 5 to unlock, and the mechanism trips under the action of the spring.

[0061] Short-circuit tripping: The short-circuit current is detected by the short-circuit induction coil 15, which drives the electromagnetic mechanism to operate. The push rod 12 pops out and pushes the trip lever 6 to achieve tripping, while triggering the identification structure to report the fault.

[0062] Mechanical locking: Push the locking element 24 to the locking position to physically block the closing path and achieve absolute safety interlocking.

[0063] This utility model organically integrates three innovative technologies, which support each other to form a high-performance, high-reliability, and high-safety intelligent circuit breaker system.

[0064] The implementation principle of this utility model is as follows: This utility model discloses a circuit breaker, including a housing, an arc-extinguishing system, and an operating mechanism. The operating mechanism is an electromagnetic opening and closing mechanism, which integrates a short-circuit opening identification structure and a mechanical locking device. The electromagnetic opening and closing mechanism adopts electromagnetic direct drive, with the short-circuit induction coil 15 and the trip coil 8 arranged horizontally side by side and sharing magnetic circuit components, resulting in a compact structure. The short-circuit opening identification structure, through the trigger part 22 at the tail of the trip lever 6, cooperates with the switch on the circuit board to mechanically trigger a short-circuit signal and report it. The mechanical locking device, through a movable locking element 24, physically blocks the movement of the closing mechanism in the locked position, preventing accidental closing. This utility model integrates high-efficiency drive, accurate fault identification, and absolute safety interlocking, and has the advantages of compact structure, fast action, strong breaking capacity, high reliability, good safety, and high degree of intelligence.

[0065] The embodiments described herein are preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape, and principle of this utility model should be included within the scope of protection of this utility model.

Claims

1. A circuit breaker, comprising a housing, an arc-extinguishing system (25) disposed within the housing, and an operating mechanism, characterized in that, The operating mechanism is an electromagnetic opening and closing mechanism, and it integrates a short-circuit opening identification structure and a mechanical locking device; The electromagnetic opening and closing mechanism includes a base (1), a handle (2), a handle spring (3), an opening and closing operation mechanism, a trip lever (6), a trip spring (7), an electromagnetic drive module, an instantaneous spring (14), a short-circuit induction coil (15), and a data acquisition and control circuit board (17). The opening and closing operation mechanism includes a moving contact (4), a latch (5), a moving contact spring (19), a latch spring (20), a large U-shaped part (18), and a stationary contact plate (21). The electromagnetic drive module includes a trip coil (8), a stationary iron core (9), a moving iron core assembly, a push rod (12), a reset spring (13), and a magnetic yoke (16). The short-circuit tripping identification structure includes a trigger part (22) and a signal trigger switch (23). The trigger part (22) is located at the tail of the trip lever (6) of the tripping and closing operation mechanism. The signal trigger switch (23) is located on the acquisition and control circuit board (17) and corresponds to the position of the trigger part (22). When a short circuit occurs, the trip lever (6) is pushed to rotate by the push rod (12), which drives the trigger part (22) to move and triggers the signal trigger switch (23) to generate a short circuit trip indication signal. The acquisition control circuit board (17) is configured to receive and upload the signal. The short-circuit induction coil (15) and the trip coil (8) are arranged horizontally side by side and share the top rod (12), the stationary iron core (9) and the magnetic yoke (16).

2. A circuit breaker according to claim 1, characterized in that, The moving iron core assembly includes moving iron core one (10) and moving iron core two (11).

3. A circuit breaker according to claim 1, characterized in that, The instantaneous spring (14) is located behind the trip coil (8), and its elastic coefficient is configured according to the rated current specification of the circuit breaker.

4. A circuit breaker according to claim 1, characterized in that, The latch (5) is installed in a specific gap of the moving contact (4) by rotation, and its vertical direction is constrained after it is installed in place.

5. A circuit breaker according to claim 1, characterized in that, The signal trigger switch (23) is a micro switch, reed switch or optocoupler switch.

6. A circuit breaker according to claim 1, characterized in that, The acquisition and control circuit board (17) is connected to a communication module, which is used to remotely upload one or more of the following information: closing status, opening status, short-circuit opening event, and locking device status.

7. A circuit breaker according to claim 1, characterized in that, The mechanical locking device includes a locking member (24), which is movably disposed on the base (1) or a component connected to the base (1), and has an unlocking position that allows closing and a locking position that prevents closing. When the locking member (24) is in the locked position, the body or extension of the locking member (24) intervenes in the movement path of the latch (5) in the opening and closing operation mechanism, physically blocking the movement of the latch (5), thereby preventing the circuit breaker from closing.

8. A circuit breaker according to claim 7, characterized in that, The movement of the locking element (24) is linear sliding, rotation around an axis, or prying; the locking device also includes a positioning structure for reliably holding the locking element (24) in the locked position and / or unlocked position.

9. A circuit breaker according to claim 7, characterized in that, The locking device also includes an auxiliary switch. When the locking member (24) moves to the locking position, the auxiliary switch is triggered, and the acquisition and control circuit board (17) acquires the signal and can report the locking status.

10. A circuit breaker according to claim 1, characterized in that, In the open state, the handle (2) presses a trip spring (7) so that it is located below the top rod (12). The trip spring (7) is installed on the upper end of the trip lever (6) and applies a biasing force to the trip lever (6). When the circuit is closed, the handle (2) rotates to release the pressure on the trip spring (7), and the trip spring (7) springs up and moves to the front end of the top rod (12).

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