A miniature circuit breaker

Abstract

The application provides a miniature circuit breaker, comprising a shell, a handle, a breaking link mechanism, an electromagnetic release, a moving contact, a static contact, an arc extinguishing grid, an arc plate, a bimetallic strip, an incoming line end, and an outgoing line end; the shell is further provided with at least one first connecting plate and at least one second connecting plate; the application further comprises a first driving member, a second driving member, a third driving member, a detection mechanism, a first circuit board, a driving mechanism, a third connecting plate, a second circuit board, and a micro switch; the detection mechanism, the driving mechanism, and the micro switch are respectively in communication connection with the first circuit board; the technical scheme provided by the application can improve the protection precision of the miniature circuit breaker and realize intelligent control, and can also realize unified monitoring, management, control, and monitoring of the opening and closing states of a plurality of miniature circuit breakers, improve work efficiency, and improve the safety of power distribution.

Description

Technical Field

[0001] This invention belongs to the field of circuit breaker technology, specifically relating to a miniature circuit breaker. Background Technology

[0002] Miniature circuit breakers (MCBs) are low-voltage circuit breakers used on AC 50 / 60Hz lines with a rated voltage of 230 / 400V and a rated current of 63A or less. They are commonly used in industrial, commercial, high-rise, and residential applications. In existing technologies, MCBs typically use electromagnetic trip units for short-circuit or overload protection and bimetallic strips for overheat protection. However, due to differences in their physical characteristics, electromagnetic trip units and bimetallic strips suffer from high variability, time delays, and poor protection accuracy, resulting in inherent safety hazards and incomplete protection for power distribution systems. Furthermore, the opening and closing states of traditional MCBs are unpredictable, and there is a lack of unified monitoring, management, and control for each MCB, requiring manual on-site inspection and control, which is time-consuming, labor-intensive, and inefficient. In view of these problems, this invention discloses a miniature circuit breaker to solve these issues. Summary of the Invention

[0003] The purpose of this invention is to overcome the defects in the prior art and provide a miniature circuit breaker that can solve the problems of time delay, poor protection accuracy, safety hazards and incomplete protection of the existing miniature circuit breakers. It can improve protection accuracy and realize intelligent control, and at the same time, it can monitor the opening and closing status of the miniature circuit breaker in real time, and realize unified monitoring, management and control of several miniature circuit breakers, thereby improving work efficiency.

[0004] To achieve the above objectives, embodiments of the present invention provide a miniature circuit breaker, comprising a housing, a handle, a breaking linkage mechanism, an electromagnetic trip unit, a moving contact, a stationary contact, an arc-extinguishing grid, an arc-starting plate, a bimetallic strip, at least one inlet terminal, and at least one outlet terminal; the stationary contact is electrically connected to the electromagnetic trip unit; the bimetallic strip is electrically connected to the moving contact; the housing is further provided with at least one first connecting piece and at least one second connecting piece; it also includes a first driving member and a second driving member; the bimetallic strip is drivenly connected to the first driving member; the second driving member is drivenly connected to the first driving member; the first driving member is drivenly connected to the breaking linkage mechanism; the first connecting piece is electrically connected to the bimetallic strip; the second connecting piece is electrically connected to the electromagnetic trip unit; it also includes a detection mechanism, a first circuit board, and a driving mechanism; the first circuit board is provided with a first microprocessor and a short circuit breaker, the detection mechanism and the driving mechanism are respectively communicatively connected to the first circuit board, and the driving mechanism is drivenly connected to the second driving member. Optionally, the detection mechanism is at least one of a current transformer, a voltage transformer, and a temperature sensor. Optionally, the driving mechanism is at least one of an electromagnetic coil, an electric push rod, a hydraulic rod, and a pneumatic rod. Thus, the first microprocessor on the first circuit board analyzes and processes in real time the current, voltage signals, and temperature signals of the miniature circuit breaker collected by the detection mechanism, and then outputs a disconnection or closing signal to the driving mechanism. This, in turn, controls the second and first driving components to move in conjunction, driving the moving contact and stationary contact to open and close. While retaining the traditional overload and overheat protection of the circuit breaker, this achieves intelligent and rapid opening and closing of the miniature circuit breaker, improving the comprehensiveness and accuracy of its protection and enhancing the safety of the power distribution system.

[0005] Furthermore, the first driving member includes a first connecting part and a driving part, the first connecting part being drivenly connected to the bimetallic strip, and the driving part being drivenly connected to the breaking linkage mechanism.

[0006] Furthermore, the second driving member includes an actuating part, a rotating shaft part, and a second connecting part. The actuating part is driven to be connected to the driving mechanism, and the second connecting part is driven to be connected to the first connecting part.

[0007] Furthermore, it also includes a micro switch and a third driving element, the micro switch being communicatively connected to the first circuit board.

[0008] Furthermore, the third driving component includes a third connecting part and a fourth connecting part. The third connecting part is driven by the handle, and the fourth connecting part is driven by the micro switch. Therefore, when the miniature circuit breaker opens or closes, the third driving component can drive the micro switch in real time, and the micro switch transmits a signal to the first circuit board. This allows for real-time monitoring of the miniature circuit breaker's opening and closing status, facilitating monitoring and management by administrators.

[0009] Furthermore, it also includes a third connecting piece, through which the first connecting piece is electrically connected to the bimetallic strip.

[0010] Furthermore, it also includes at least one first connector and at least one second connector, wherein the first connector is connected to the inlet terminal via the first connector; and the second connector is connected to the outlet terminal via the second connector.

[0011] Optionally, the first connector and the second connector can be a plug, a socket, a screw, or a wire clamp.

[0012] Furthermore, it also includes a second circuit board, which is communicatively connected to the short circuit device. The second circuit board is equipped with a second processor, a power supply, and a communication port. The communication port can communicate with external devices; the power supply is used to power at least one of the first circuit board, the second circuit board, the detection mechanism, and the drive mechanism; thereby, the second circuit board can connect several miniature circuit breakers through various short circuits. At the same time, the second processor on the second circuit board can also analyze and process in real time the current, voltage signals and temperature signals of each pluggable miniature circuit breaker collected by the detection mechanism through the first circuit board. Then, it directly outputs or outputs the disconnection or closing signal to the drive mechanism of each miniature circuit breaker through the first circuit board. Thus, the drive mechanism controls the second drive component and the first drive component to drive the disconnection linkage mechanism to operate, driving the opening and closing of the moving contact and the stationary contact. While retaining the traditional overload and overheat protection of the circuit breaker, it realizes the intelligent and fast opening and closing of the pluggable miniature circuit breaker, improves the protection comprehensiveness and protection accuracy of the pluggable miniature circuit breaker, enhances the safety of the power distribution system, thereby realizing the unified monitoring, management and control of several miniature circuit breakers, improving work efficiency, and also realizing remote control.

[0013] Optionally, the first connecting piece, the second connecting piece, and the third connecting piece are U-shaped, L-shaped, or any combination thereof.

[0014] The miniature circuit breaker provided by this invention has the following advantages: it can solve the problems of time delay, poor protection accuracy, safety hazards and incomplete protection of existing miniature circuit breakers, improve the protection accuracy of miniature circuit breakers and realize intelligent control of miniature circuit breakers, and can also realize unified monitoring, management and control of several miniature circuit breakers. At the same time, it can monitor the opening and closing status of miniature circuit breakers in real time, which is convenient for managers to monitor and manage, improves work efficiency and enhances the safety of power distribution systems. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of the miniature circuit breaker provided in Embodiment 1 of the present invention.

[0017] Explanation of icon numbers:

[0018] 1. Housing; 2. Second connecting piece; 3. Handle; 4. Breaking linkage mechanism; 5. Electromagnetic trip unit; 6. Moving contact; 7. Stationary contact; 8. Arc extinguishing grid; 9. Arc ignition plate; 10. Bimetallic strip; 11. Third driving component; 1101. Third connecting part; 1102. Fourth connecting part; 12. First driving component; 1201. First connecting part; 1202. Driving part; 13. Second connecting piece; 14. Micro switch; 15. First connecting piece; 16. First connecting piece; 17. Inlet terminal; 18. Second driving component; 1801. Actuating part; 1802. Rotating shaft part; 1803. Second connecting part; 19. Driving mechanism; 20. Third connecting piece; 21. Short circuit; 22. First circuit board; 23. Outlet terminal; 24. Detection mechanism; 25. First microprocessor. Detailed Implementation

[0019] The miniature circuit breaker of the present invention will now be described in detail with reference to the accompanying drawings.

[0020] Example 1

[0021] Figure 1 The diagram shows a structural schematic of the miniature circuit breaker in this embodiment. Figure 1As shown, a preferred embodiment of the miniature circuit breaker of the present invention includes a housing 1, a handle 3, a breaking linkage mechanism 4, an electromagnetic trip unit 5, a moving contact 6, a stationary contact 7, an arc-extinguishing grid 8, an arc-starting plate 9, a bimetallic strip 10, at least one inlet terminal 17, and at least one outlet terminal 23; the stationary contact 7 is electrically connected to the electromagnetic trip unit 5; the bimetallic strip 10 is electrically connected to the moving contact 6; the housing 1 is further provided with at least one first connecting piece 15 and at least one second connecting piece 2; it also includes a first driving member 12 and a second driving member 18; the bimetallic strip 10 is driven by the first driving member 12. The system includes: a connection between the second driving component 18 and the first driving component 12; a driving connection between the first driving component 12 and the breaking linkage mechanism 4; an electrical connection between the first connecting piece 15 and the bimetallic strip 10; an electrical connection between the second connecting piece 2 and the electromagnetic trip unit 5; and a detection mechanism 24, a first circuit board 22, and a driving mechanism 19. The first circuit board 22 is provided with a first microprocessor 25 and a short circuit 21. The detection mechanism 24 and the driving mechanism 19 are respectively communicatively connected to the first circuit board 22, and the driving mechanism 19 is drivingly connected to the second driving component 18.

[0022] Optionally, the detection mechanism 24 is at least one of a current transformer, a voltage transformer, and a temperature sensor. Optionally, the drive mechanism 19 is at least one of an electromagnetic coil, an electric push rod, a hydraulic rod, and a pneumatic rod. Thus, the first microprocessor on the first circuit board analyzes and processes in real time the current, voltage signals, and temperature signals of the miniature circuit breaker collected by the detection mechanism, and then outputs a disconnection or closing signal to the drive mechanism. This, in turn, controls the second and first drive components to move in conjunction, driving the disconnection linkage mechanism to open and close the moving and stationary contacts. While retaining the traditional overload and overheat protection of the circuit breaker, this achieves intelligent and rapid opening and closing of the miniature circuit breaker, improving the comprehensiveness and accuracy of its protection and enhancing the safety of the power distribution system. For example, the first microprocessor in the first circuit board can determine power distribution anomalies such as short-circuit current, overload current, leakage current, and three-phase unbalanced current by comparing the current signal with rated values ​​such as rated current. In real time, it controls the second driving component and the first driving component to drive the tripping linkage mechanism to operate, thereby driving the moving contact and the stationary contact to open the circuit breaker and quickly and accurately disconnect the power distribution line. This achieves precise protection against power distribution anomalies such as short-circuit protection, overload protection, leakage current protection, and three-phase unbalanced current, improving the comprehensiveness and accuracy of power distribution protection of the miniature circuit breaker and realizing intelligent control.

[0023] Optionally, the first microprocessor and the second microprocessor can be MC68HC908AP32 chips, and the first circuit board and the second circuit board can be PCB boards.

[0024] Furthermore, the first driving member 12 includes a first connecting part 1201 and a driving part 1202. The first connecting part 1201 is drivenly connected to the bimetallic strip 10, and the driving part 1202 is drivenly connected to the breaking linkage mechanism 4.

[0025] Furthermore, the second driving member 18 includes an actuating part 1801, a rotating shaft part 1802, and a second connecting part 1803. The actuating part 1801 is driven to be connected to the driving mechanism 19, and the second connecting part 1803 is driven to be connected to the first connecting part 1201.

[0026] Furthermore, it also includes a micro switch 14 and a third drive unit 11, with the micro switch 14 being communicatively connected to the first circuit board 22.

[0027] Furthermore, the third driving component 11 includes a third connecting part 1101 and a fourth connecting part 1102. The third connecting part 1101 is driven to the handle 3, and the fourth connecting part 1102 is driven to the micro switch 14. Therefore, when the miniature circuit breaker opens or closes, the third driving component can drive the micro switch in real time, transmitting a signal to the first circuit board. This allows for real-time monitoring of the opening and closing status of the miniature circuit breaker, enabling real-time control of the opening and closing status of each miniature circuit breaker and facilitating monitoring and management by administrators.

[0028] Furthermore, it also includes a third connecting piece 20, through which the first connecting piece 15 is electrically connected to the bimetallic sheet 10.

[0029] Furthermore, it also includes at least one first connector 16 and at least one second connector 13, wherein the first connector 15 is connected to the inlet terminal 17 via the first connector 16; and the second connector 2 is connected to the outlet terminal 23 via the second connector 13.

[0030] Optionally, the first connector and the second connector can be a plug, a socket, a screw, or a wire clamp.

[0031] Furthermore, it also includes a second circuit board, which is communicatively connected to the short circuit 21. The second circuit board is provided with a second processor, a power supply, and a communication port. For ease of understanding, these are not shown in the accompanying drawings. The second circuit board can be disposed inside or outside the housing. The communication port can communicate with external devices; the power supply is used to power at least one of the first circuit board, the second circuit board, the detection mechanism, and the drive mechanism; thereby, the second circuit board can connect several miniature circuit breakers through various short circuits. At the same time, the second processor on the second circuit board can also analyze and process in real time the current, voltage signals and temperature signals of each pluggable miniature circuit breaker collected by the detection mechanism through the first circuit board. Then, it directly outputs or outputs the disconnection or closing signal through the first circuit board to the drive mechanism of each miniature circuit breaker. Thus, the drive mechanism controls the second drive component and the first drive component to drive the disconnection linkage mechanism to operate, driving the opening and closing of the moving contact and the stationary contact. While retaining the traditional overload and overheat protection of the circuit breaker, it realizes the intelligent and fast opening and closing of the pluggable miniature circuit breaker, improves the protection comprehensiveness and protection accuracy of the pluggable miniature circuit breaker, and enhances the safety of the power distribution system. For example, the second microprocessor in the second circuit board can determine power distribution anomalies such as short-circuit current, overload current, leakage current, and three-phase unbalanced current based on the current signal and by comparing it with rated values ​​such as rated current. This allows for real-time direct control or control via the first circuit board of the drive mechanism of each miniature circuit breaker. The first and second drive components are linked to activate the tripping linkage mechanism, causing the moving and stationary contacts to open, quickly and accurately disconnecting the power distribution line. This achieves precise protection against power distribution anomalies such as short-circuit, overload, leakage, and three-phase unbalanced current, improving the comprehensiveness and accuracy of power distribution protection for plug-in miniature circuit breakers and enabling intelligent control. This allows for unified monitoring, management, and control of multiple miniature circuit breakers, improving work efficiency and enabling remote control.

[0032] Optionally, the first connecting piece 15, the second connecting piece 2, and the third connecting piece 20 can be U-shaped, L-shaped, or any combination of both.

[0033] The miniature circuit breaker provided by this invention can solve the problems of time delay, poor protection accuracy, safety hazards, and incomplete protection of existing miniature circuit breakers. It improves the protection accuracy of miniature circuit breakers and realizes intelligent control of miniature circuit breakers. It can also realize unified monitoring, management and control of several miniature circuit breakers. At the same time, it can monitor the opening and closing status of miniature circuit breakers in real time, which facilitates monitoring and management by managers, improves work efficiency, and enhances the safety of power distribution systems.

[0034] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A miniature circuit breaker, comprising a housing (1), a handle (3), a tripping linkage mechanism (4), an electromagnetic trip unit (5), a moving contact (6), a stationary contact (7), an arc-extinguishing grid (8), an arc-starting plate (9), a bimetallic strip (10), at least one inlet terminal (17), and at least one outlet terminal (23); wherein the stationary contact (7) is electrically connected to the electromagnetic trip unit (5); and the bimetallic strip (10) is electrically connected to the moving contact (6); characterized in that, The housing (1) is further provided with at least one first connecting piece (15) and at least one second connecting piece (2); it also includes a first driving member (12) and a second driving member (18); the bimetallic strip (10) is driven connected to the first driving member (12); the second driving member (18) is driven connected to the first driving member (12); the first driving member (12) is driven connected to the breaking linkage mechanism (4); the first connecting piece (15) is electrically connected to the bimetallic strip (10); the second connecting piece (2) is electrically connected to the electromagnetic trip unit (5); it also includes a detection mechanism (24), a first circuit board (22), and a driving mechanism (19); the first circuit board (22) is provided with a first microprocessor (25) and a short circuit (21), the detection mechanism (24) and the driving mechanism (19) are respectively communicatively connected to the first circuit board (22), and the driving mechanism (19) is driven connected to the second driving member (18); The first driving member (12) includes a first connecting part (1201) and a driving part (1202). The first connecting part (1201) is driven to the bimetallic strip (10), and the driving part (1202) is driven to the breaking linkage mechanism (4). The second driving member (18) includes an actuating part (1801), a rotating shaft part (1802), and a second connecting part (1803). The actuating part (1801) is driven to be connected to the driving mechanism (19), and the second connecting part (1803) is driven to be connected to the first connecting part (1201).

2. The miniature circuit breaker according to claim 1, characterized in that, The detection mechanism (24) is at least one of a current transformer, a voltage transformer, and a temperature sensor.

3. The miniature circuit breaker according to claim 1, characterized in that, The drive mechanism (19) is at least one of an electromagnetic coil, an electric push rod, a hydraulic rod, and a pneumatic rod.

4. The miniature circuit breaker according to claim 1, characterized in that, It also includes a micro switch (14) and a third drive unit (11), the micro switch (14) being communicatively connected to the first circuit board (22).

5. The miniature circuit breaker according to claim 4, characterized in that, The third driving component (11) includes a third connecting part (1101) and a fourth connecting part (1102). The third connecting part (1101) is driven to the handle (3), and the fourth connecting part (1102) is driven to the micro switch (14).

6. The miniature circuit breaker according to claim 1, characterized in that, It also includes a third connecting piece (20), through which the first connecting piece (15) is electrically connected to the bimetallic sheet (10).

7. The miniature circuit breaker according to claim 1, characterized in that, It also includes at least one first connector (16) and at least one second connector (13), wherein the first connector (15) is connected to the inlet terminal (17) via the first connector (16); and the second connector (2) is connected to the outlet terminal (23) via the second connector (13).

8. The miniature circuit breaker according to claim 1, characterized in that, It also includes a second circuit board, which is communicatively connected to the short circuit (21), and the second circuit board is provided with a second processor, a power supply, and a communication port.

Images