A circuit breaker device

Abstract

This invention discloses a circuit breaker device, relating to the technical field of circuit breaker devices. It includes a protective housing, a conductive terminal assembly, a telescopic assembly, and a control unit. The protective housing houses the control unit, the conductive terminal assembly, and a terminal block. Fixed terminals of the conductive terminal assembly are fixedly connected to the protective housing, while movable terminals are movably mounted on the protective housing. The telescopic assembly is disposed within the protective housing and is communicatively connected to the control unit. The control unit can set the rated circuit breaker value. Both the fixed terminals and the terminal block are used for circuit connection. One end of the movable terminal is electrically connected to the terminal block, and the other end can contact or disconnect the fixed terminal. Both the protective housing and the telescopic assembly are insulators. This invention enables the control unit to actively adjust the rated value of the automatic circuit breaker device and, through the telescopic assembly, drives the movable terminal to contact or disconnect the fixed terminal, achieving active adjustment of circuit on / off. This solves the problem of inconvenient and rapid control connection in existing technologies, facilitating subsequent maintenance and better assisting in circuit breaker control tasks.

Description

Technical Field

[0001] This invention relates to the technical field of circuit breaker devices, and in particular to a circuit breaker device. Background Technology

[0002] A circuit breaker is a switching device capable of closing, carrying, and interrupting current under normal circuit conditions and closing, carrying, and interrupting current under abnormal circuit conditions within a specified time. Circuit breakers are used to distribute electrical energy and protect power lines and motors. They automatically disconnect the circuit when serious overloads, short circuits, or undervoltage faults occur. Their function is equivalent to a combination of a fuse switch and over / under-temperature relays, and generally, no parts need to be replaced after interrupting a fault current. In the generation, transmission, and use of electricity, power distribution is a crucial link, and circuit breakers are a widely used electrical component in power distribution systems.

[0003] Existing circuit breakers achieve circuit breaking function through spring, gear and rack structure. They have many components and complex structure. During use, the breaking rated value cannot be adjusted, making it inconvenient to quickly connect to control, resulting in low adaptability of circuit breaker installation. Summary of the Invention

[0004] The purpose of this invention is to provide a circuit breaker device to solve the problems existing in the prior art, so that the circuit breaker rating can be adjusted, and the structure is simple and convenient to use.

[0005] To achieve the above objectives, the present invention provides the following solution:

[0006] This invention provides a circuit breaker device, including a protective shell, a conductive terminal assembly, a telescopic assembly, and a control unit. The protective shell is provided with the control unit, the conductive terminal assembly, and a terminal block. The fixed terminal of the conductive terminal assembly is fixedly connected to the protective shell, and the movable terminal is movably disposed on the protective shell. The telescopic assembly is disposed inside the protective shell and is communicatively connected to the control unit. The control unit can set a circuit breaker rating. Both the fixed terminal and the terminal block are used to connect to a circuit. One end of the movable terminal is electrically connected to the terminal block, and the other end can contact the fixed terminal to make or break the connection. Both the protective shell and the telescopic assembly are insulators.

[0007] Preferably, the telescopic assembly includes a telescopic rod and a connecting seat. The top rod of the telescopic rod is movably connected to the connecting seat, and the cylinder is hinged to the back plate of the protective shell. The telescopic rod can drive the connecting seat to translate. One end of the movable terminal is fixedly connected to the connecting seat, and the other end of the movable terminal passes through the top plate of the protective shell. The top rod of the telescopic rod is hinged to the connecting seat through a trigger assembly. The telescopic rod is a gas spring.

[0008] Preferably, the triggering assembly includes a telescopic trigger rod, an L-shaped connecting rod, and a straight connecting rod. The sliding rod of the telescopic trigger rod is connected to the back plate of the protective shell via a pin, and the sliding sleeve is connected to one end of the L-shaped connecting rod. The other end of the L-shaped connecting rod is connected to the top rod of the telescopic rod. One end of the straight connecting rod is hinged at the corner of the L-shaped connecting rod, and the other end of the straight connecting rod is hinged to the connecting seat.

[0009] Preferably, a drive component is movably connected to the trigger component of the telescopic component. The drive component is used to drive the telescopic component to move the movable terminal. The drive component includes a motor, a toothed wheel, and a push rod. The rotating shaft of the motor is connected to the toothed wheel, and the push rod is fixedly connected to the toothed wheel. The rotation of the push rod can cause the telescopic trigger rod of the trigger component to swing downward.

[0010] Preferably, the toothed gear of the drive assembly includes a driving gear and a driven gear. The driving gear is connected to the rotating shaft of the motor. The motor is fixed in a through hole on the back plate of the protective shell. The driving gear and the driven gear mesh with each other. The driven gear is rotatably connected to the back plate of the protective shell through a short shaft. The driven gear is provided with the push rod. The telescopic trigger rod is provided with a protrusion. The protrusion is located within the movement trajectory of the push rod.

[0011] Preferably, the back plate of the protective shell is further provided with a locking assembly, which includes a tooth and a telescopic rod. The outer cylinder of the telescopic rod is fixed to the side plate of the protective shell, and the tooth is connected to the inner rod. The tooth can be inserted between the teeth of the driving gear or the driven gear. The motor and the telescopic rod are both communicatively connected to the control unit. The driving assembly and the locking assembly are both insulators.

[0012] Preferably, the toothed wheel is a ratchet; the back plate of the protective shell is also provided with a locking assembly, the locking assembly includes a pawl and a telescopic rod, the pawl is hinged to the back plate, the two ends of the telescopic rod are respectively hinged to the side plate of the protective shell and the pawl, the motor and the telescopic rod are both communicatively connected to the control unit; the drive assembly and the locking assembly are both insulators.

[0013] Preferably, the conductive terminal assembly includes a fixed terminal and a movable terminal. The movable terminal is a movable conductive rod. The fixed terminal has a connecting groove in the middle. A fixed conductive rod is fixedly installed at one end of the connecting groove, and the other end is hollow. The hollow end of the fixed terminal is fixedly installed on the protective shell. The movable conductive rod passes through the protective shell and is slidably installed in the connecting groove. The inner end of the movable conductive rod is connected to the telescopic assembly. Both the fixed conductive rod and the terminal block are used to connect to the circuit. The inner end of the movable conductive rod is connected to the terminal block, and the outer end can contact the fixed conductive rod to connect or disconnect.

[0014] Preferably, a cover is detachably connected to the protective shell, and the control unit is disposed on the cover.

[0015] Preferably, the control unit includes a display screen, a control panel, and control buttons. The display screen and several control buttons are all disposed on the outer surface of the cover, and the control panel is disposed on the inner surface of the cover. The display screen and the control buttons are all communicatively connected to the control panel.

[0016] Preferably, the control panel is equipped with a current sensor and a voltage sensor, the display screen can display the current, voltage, circuit breaker rating, and circuit on / off status of the current circuit, and the control buttons include a start button and a stop button for the motor, a lock button and an unlock button for the locking mechanism, and an adjustment button for the circuit breaker rating.

[0017] The present invention achieves the following technical effects compared to the prior art:

[0018] This invention can control the unit to actively adjust the rated value of the automatic circuit breaker, and drive the movable terminal to contact and connect or disconnect the fixed terminal through the telescopic component, thereby realizing the active adjustment of the circuit on and off. This solves the problem of inconvenient and quick connection control in the prior art, facilitates subsequent maintenance work, and better assists in circuit breaker control tasks. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the assembly structure of the circuit breaker device in an embodiment of the present invention;

[0021] Figure 2 This is a partial disassembled structural diagram of the circuit breaker device in an embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the internal structure of the circuit breaker device in an embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of the internal structure after the faceplate is opened in an embodiment of the present invention;

[0024] Figure 5 This is a schematic diagram of the locking component in an embodiment of the present invention;

[0025] Figure 6 This is a schematic diagram of the protective shell and conductive terminal assembly in an embodiment of the present invention;

[0026] In the diagram: 1-Protective shell, 2-Face cover, 3-Back plate, 4-Fixed terminal, 5-Fixed conductive rod, 6-Modible conductive rod, 7-Guide sleeve, 8-Terminal bracket, 9-Connecting seat, 10-Telescopic rod, 11-Telescopic trigger rod, 12-L-shaped connecting rod, 13-Straight connecting rod, 14-Sliding sleeve, 15-Sliding rod, 16-Motor, 17-Push rod, 18-Driving gear, 19-Driven gear, 20-Protrusion, 21-Gear, 22-Pin, 23-Hinge seat, 24-Display screen, 25-Control button. Detailed Implementation

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] It should be noted that in the description of this invention, the terms "upper," "lower," "left," "right," "inner," "outer," "front," and "rear," etc., indicating directional or positional relationships, are based on the directional or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0030] The purpose of this invention is to provide a circuit breaker device to solve the problems existing in the prior art, so that the circuit breaker rating can be adjusted, and the structure is simple and convenient to use.

[0031] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Example 1

[0032] like Figures 1 to 6 As shown, this embodiment provides a circuit breaker device, including a protective shell 1, a conductive terminal assembly, a telescopic assembly, and a control unit. The protective shell 1 is provided with a control unit, a conductive terminal assembly, and a terminal block 8. The fixed terminal 4 of the conductive terminal assembly is fixedly connected to the protective shell 1, and the movable terminal is movably disposed on the protective shell 1. The telescopic assembly is disposed inside the protective shell 1 and is communicatively connected to the control unit. The control unit can set the circuit breaker rating. Both the fixed terminal 4 and the terminal block 8 are used to connect to the circuit. One end of the movable terminal is electrically connected to the terminal block 8, and the other end can contact the fixed terminal 4 to make or break the connection. Both the protective shell 1 and the telescopic assembly are insulators.

[0033] As an optional solution, in this embodiment, the telescopic assembly includes a telescopic rod 10 and a connecting seat 9. The top rod of the telescopic rod 10 is movably connected to the connecting seat 9, and the cylinder body and the back plate 3 of the protective shell 1 are hinged by a pin 22 and a hinge seat 23. The telescopic rod 10 can drive the connecting seat 9 to translate. One end of the connecting seat 9 is fixedly connected to a movable terminal, and the other end of the movable terminal penetrates through the top plate of the protective shell 1. The top rod of the telescopic rod 10 is hinged to the connecting seat 9 through a trigger assembly. The telescopic rod 10 can rebound autonomously, and the telescopic rod 10 can be a gas spring (pneumatic spring telescopic rod). In this embodiment, the telescopic rod 10 can be driven to move directly downward, thereby driving the movable terminal to move downward and disconnect from the fixed terminal 4, thus breaking the circuit. The telescopic rod 10 connected to the movable terminal is the first telescopic rod, and the lower end of the first telescopic rod is connected to the back plate 3 through a first pin and a first hinge seat.

[0034] As an optional solution, in this embodiment, the triggering assembly includes a telescopic trigger rod 11, an L-shaped connecting rod 12, and a straight connecting rod 13. The sliding rod 15 of the telescopic trigger rod 11 is connected to the back plate 3 of the protective shell 1 via a pin 22, and the sliding sleeve 14 is connected to one end of the L-shaped connecting rod 12. Preferably, the sliding rod 15 is fixedly connected to the back plate 3 of the protective shell 1 via a pin 22. The sliding rod 15 is connected to the back plate 3 via a third pin and a third hinge seat, providing vertical guidance for the sliding sleeve 14. Rod 15 is fitted inside sliding sleeve 14. When push rod 17 strikes protrusion 20 on telescopic trigger rod 11, protrusion 20 moves vertically along sliding sleeve 14 until protrusion 20 is released from the pressure of push rod 17, and then automatically resets under the restoring force of first telescopic rod 10. The other end of L-shaped connecting rod 12 is connected to the top rod of first telescopic rod 10. One end of straight connecting rod 13 is hinged at the corner of L-shaped connecting rod 12, and the other end of straight connecting rod 13 is hinged to connecting seat 9. The telescopic trigger rod 11 and L-shaped connecting rod 12 can also be made as a single unit. In this embodiment, by driving the telescopic trigger rod 11 downward, it compresses the top rod of telescopic rod 10 downward, causing the movable terminal to move downward and disconnect from the fixed terminal 4, thus breaking the circuit.

[0035] As an optional solution, in this embodiment, a drive component is movably connected to the trigger component of the telescopic assembly. The drive component is used to drive the telescopic assembly to move the movable terminal. The drive component includes a motor 16, a toothed wheel, and a push rod 17. The shaft of the motor 16 is connected to the toothed wheel, and the push rod 17 is fixedly connected to the toothed wheel. The rotation of the push rod 17 can cause the telescopic trigger rod 11 of the trigger assembly to swing downward. In this embodiment, there is only one toothed wheel. Alternatively, the push rod 17 can be used to make the telescopic trigger rod 11 of the trigger assembly swing downward, thereby compressing the top rod of the first telescopic rod 10 downward, which will drive the movable terminal to move downward and disconnect from the fixed terminal 4, thus breaking the circuit. The push rod 17 is preferably an L-shaped rod, which can ensure that one side wall of the L-shaped rod is always in contact with the protrusion 20 on the telescopic trigger rod 11. The telescopic rod 10 connected to the push rod 17 is the second telescopic rod. The lower end of the second telescopic rod is connected to the back plate 3 through a second pin and a second hinge seat.

[0036] As an optional solution, in this embodiment, the toothed gear of the drive component includes a driving gear 18 and a driven gear 19. The driving gear 18 is connected to the rotating shaft of the motor 16. The motor 16 is fixed in the through hole on the back plate 3 of the protective shell 1. The driving gear 18 and the driven gear 19 mesh with each other. The driven gear 19 is rotatably connected to the back plate 3 of the protective shell 1 through a short shaft. A push rod 17 is provided on the driven gear 19. A protrusion 20 is provided on the telescopic trigger rod 11. The protrusion 20 is located within the movement trajectory of the push rod 17. When the driven gear 19 drives the push rod 17 to rotate, the push rod 17 will hit the protrusion 20 on the telescopic trigger rod 11, causing the telescopic trigger rod 11 to swing downward, thereby compressing the top rod of the telescopic rod 10 downward, which will drive the movable terminal to move downward and disconnect from the fixed terminal 4, thus breaking the circuit.

[0037] As an optional solution, in this embodiment, a locking assembly is also provided on the back plate 3 of the protective shell 1. The locking assembly includes a tooth 21 and a telescopic rod 10. The outer cylinder of the telescopic rod 10 is fixed to the side plate of the protective shell 1, and the tooth 21 is connected to the inner rod. In this embodiment, the tooth 21 is preferably provided on a connecting plate. The tooth 21 can be inserted between the teeth of the driving gear 18 or the driven gear 19. The motor 16 and the telescopic rod 10 are both connected to the control unit. The telescopic rod 10 can be a gas spring (pneumatic spring telescopic rod). Both the driving assembly and the locking assembly are insulators to prevent electric arcing inside the protective shell 1. In this embodiment, a push plate is preferably provided between the tooth 21 and the inner rod of the telescopic rod 10 to facilitate spatial misalignment and layout. When a circuit break is required, the motor 16 stops, and the telescopic rod 10 pushes out the tooth 21 to be inserted between the teeth of the driving gear 18 or the driven gear 19, which can prevent the teeth of the driving gear 18 or the driven gear 19 from continuing to rotate or return, ensuring the stability and reliability of the connection. The telescopic rod 10 of the locking assembly is the third telescopic rod, which is fixed to the side plate of the protective shell 1.

[0038] As an optional embodiment, the conductive terminal assembly includes a fixed terminal 4 and a movable terminal. The movable terminal is a movable conductive rod 6. An insulating guide sleeve 7 is provided on the top of the protective shell 1. The movable conductive rod 6 passes through the guide sleeve 7 and the protective shell 1. The guide sleeve 7 is threaded or snapped to the lower end of the fixed terminal 4. A connecting groove is provided in the middle of the fixed terminal 4. A fixed conductive rod 5 is fixedly installed at one end of the connecting groove, and the other end is hollow. The hollow end of the fixed terminal 4 is fixedly installed on the protective shell 1. The movable conductive rod 6 passes through the protective shell 1 and slides in the connecting groove. The inner end of the movable conductive rod 6 is connected to a telescopic component. Both the fixed conductive rod 5 and the terminal block 8 are used to connect to the circuit. The inner end of the movable conductive rod 6 is connected to the terminal block 8, and the outer end can contact the fixed conductive rod 5 to make or break the connection. When the outer end of the movable conductive rod 6 contacts the fixed conductive rod 5, the circuit can conduct electricity. When the outer end of the movable conductive rod 6 breaks the connection with the fixed conductive rod 5, the circuit can perform circuit breaking control. The housing of the fixed terminal 4 is an insulator and can be configured as a stacked tower with several grooves for arc extinguishing.

[0039] As an optional solution, in this embodiment, a cover 2 is detachably connected to the protective shell 1, and a control unit is provided on the cover 2. Preferably, the cover 2 is snap-fitted or hinged to the protective shell 1 for easy opening and maintenance.

[0040] As an optional solution, in this embodiment, the control unit includes a display screen 24, a control panel, and control buttons 25. The display screen 24 and several control buttons 25 are all disposed on the outer surface of the cover 2, and the control panel is disposed on the inner surface of the cover 2. The display screen 24 and the control buttons 25 are all communicatively connected to the control panel. The display screen 24 can also be a touch screen for easier operation.

[0041] As an optional solution, this embodiment includes a current sensor and a voltage sensor on the control panel to detect current and voltage. The display screen 24 can display the current, voltage, circuit breaker rating, and circuit on / off status of the current circuit. The control buttons 25 include a start and stop button for the motor 16, a lock and unlock button for the locking mechanism, and an adjustment button for the circuit breaker rating. The current sensor is connected in series in the circuit for current detection, and the voltage sensor is connected in parallel in the circuit for voltage detection. The control panel can set the circuit breaker rating and can also be remotely controlled via a communication module to meet the needs of various operating conditions such as maintenance, shutdown, and safety protection, while avoiding economic losses and personal injury caused by overload circuit breaking. Example 2

[0042] Unlike Embodiment 1, in this embodiment, the toothed wheel of the drive assembly is a ratchet; a locking assembly is also provided on the back plate 3 of the protective shell 1, which includes a pawl and a telescopic rod 10. The pawl is hinged to the back plate 3, and both ends of the telescopic rod 10 are hinged to the side plate of the protective shell 1 and the pawl, respectively. Both the motor 16 and the telescopic rod 10 are communicatively connected to the control unit; both the drive assembly and the locking assembly are insulators. When a circuit break is required, the motor 16 stops rotating, and the telescopic rod 10 extends the pawl to lock the ratchet, preventing the ratchet from continuing to rotate or turn back, thus ensuring a stable and reliable connection.

[0043] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A circuit breaker device, characterized in that: The device includes a protective shell, a conductive terminal assembly, a telescopic assembly, and a control unit. The protective shell is equipped with the control unit, the conductive terminal assembly, and a terminal block. The fixed terminals of the conductive terminal assembly are fixedly connected to the protective shell, and the movable terminals are movably disposed on the protective shell. The telescopic assembly is disposed inside the protective shell and is communicatively connected to the control unit. The control unit can be set with a circuit-breaking rating. Both the fixed terminals and the terminal block are used to connect to a circuit. One end of the movable terminal is electrically connected to the terminal block, and the other end can contact the fixed terminal to make or break the connection. Both the protective shell and the telescopic assembly are insulators. The telescopic assembly includes a telescopic rod and a connecting seat. The top rod of the telescopic rod is movably connected to the connecting seat, and the cylinder of the telescopic rod is hinged to the back plate of the protective shell. The telescopic rod can drive the connecting seat to move horizontally. One end of the movable terminal is fixedly connected to the connecting seat, and the other end of the movable terminal passes through the top plate of the protective shell. The conductive terminal assembly includes a fixed terminal and a movable terminal. The movable terminal is a movable conductive rod. The fixed terminal has a connecting groove in the middle. A fixed conductive rod is fixedly installed at one end of the connecting groove, and the other end is hollow. The hollow end of the fixed terminal is fixedly installed on the protective shell. The movable conductive rod passes through the protective shell and is slidably installed in the connecting groove. The inner end of the movable conductive rod is connected to the telescopic assembly. Both the fixed conductive rod and the terminal block are used to connect to the circuit. The inner end of the movable conductive rod is connected to the terminal block, and the outer end can contact the fixed conductive rod to connect or disconnect.

2. The circuit breaker according to claim 1, characterized in that: The top rod of the telescopic rod is hinged to the connecting seat via a trigger assembly; the telescopic rod is a gas spring.

3. The circuit breaker according to claim 2, characterized in that: The triggering assembly includes a telescopic trigger rod, an L-shaped connecting rod, and a straight connecting rod. The sliding rod of the telescopic trigger rod is connected to the back plate of the protective shell via a pin, and the sliding sleeve is connected to one end of the L-shaped connecting rod. The other end of the L-shaped connecting rod is connected to the top rod of the telescopic rod. One end of the straight connecting rod is hinged at the corner of the L-shaped connecting rod, and the other end of the straight connecting rod is hinged to the connecting seat.

4. The circuit breaker according to claim 1, characterized in that: A drive component is movably connected to the trigger component of the telescopic component. The drive component is used to drive the telescopic component to move the movable terminal. The drive component includes a motor, a toothed wheel, and a push rod. The motor shaft is connected to the toothed wheel, and the push rod is fixedly connected to the toothed wheel. The rotation of the push rod can cause the telescopic trigger rod of the trigger component to swing downward.

5. The circuit breaker according to claim 4, characterized in that: The drive assembly includes a toothed gear and a driven gear. The drive gear is connected to the shaft of the motor. The motor is fixed in a through hole on the back plate of the protective shell. The drive gear and the driven gear mesh with each other. The driven gear is rotatably connected to the back plate of the protective shell through a short shaft. The driven gear is provided with a push rod. The telescopic trigger rod is provided with a protrusion located within the movement trajectory of the push rod.

6. The circuit breaker according to claim 5, characterized in that: The back plate of the protective shell is also provided with a locking assembly, which includes a toothed pin and a telescopic rod. The outer cylinder of the telescopic rod is fixed to the side plate of the protective shell, and the toothed pin is connected to the inner rod. The toothed pin can be inserted between the teeth of the driving gear or the driven gear. The motor and the telescopic rod are both communicatively connected to the control unit. The driving assembly and the locking assembly are both insulators.

7. The circuit breaker according to claim 4, characterized in that: The toothed wheel is a ratchet; a locking assembly is also provided on the back plate of the protective shell, the locking assembly includes a pawl and a telescopic rod, the pawl is hinged to the back plate, and the two ends of the telescopic rod are respectively hinged to the side plate of the protective shell and the pawl, the motor and the telescopic rod are both communicatively connected to the control unit; the drive assembly and the locking assembly are both insulators.

8. The circuit breaker according to claim 1, characterized in that: A cover is detachably connected to the protective shell, and the control unit is disposed on the cover. The control unit includes a display screen, a control panel, and control buttons. The display screen and several control buttons are disposed on the outer surface of the cover, and the control panel is disposed on the inner surface of the cover. The display screen and the control buttons are communicatively connected to the control panel.

9. The circuit breaker according to claim 8, characterized in that: The control panel is equipped with a current sensor and a voltage sensor. The display screen can display the current, voltage, circuit breaker rating, and circuit on / off status of the current circuit. The control buttons include a start button and a stop button for the motor, a lock button and an unlock button for the locking mechanism, and an adjustment button for the circuit breaker rating.

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