Circuit breaking device, torque monitoring module and circuit breaker wiring state monitoring method
Patent Information
- Application Number
- CN202210099444.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-01-27
- Publication Date
- 2026-09-22
- Estimated Expiration
- 2042-01-27
AI Technical Summary
然而,此种方式中无法监测断路器的接线状态,当断路器接线不良时,容易导致线路过热,严重时容易引发火灾事故
[0004]本申请实施例的目的在于提供一种断路装置、扭矩监测模块及断路器接线状态监测方法,用于监测断路器的接线状态。
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Figure CN114496667B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of circuit breaker technology, and in particular to a circuit breaker device, a torque monitoring module, and a method for monitoring the wiring status of a circuit breaker. Background Technology
[0002] A circuit breaker is a switching device capable of closing, carrying, and interrupting current under normal circuit conditions, and capable of closing, carrying, and interrupting current under abnormal circuit conditions within a specified time. Circuit breakers can be classified into high-voltage circuit breakers and low-voltage circuit breakers according to their application range. Circuit breakers can protect power lines and motors, automatically disconnecting the circuit in the event of severe overload, short circuit, or undervoltage faults, thereby achieving circuit protection.
[0003] In existing technology, a torque screwdriver is typically used to connect the power cord to the circuit breaker's terminals, enabling the circuit breaker to protect the circuit. However, this method cannot monitor the circuit breaker's wiring status. Poor wiring can easily lead to overheating of the circuit, and in severe cases, can cause a fire. Summary of the Invention
[0004] The purpose of this application is to provide a circuit breaker device, a torque monitoring module, and a method for monitoring the wiring status of a circuit breaker.
[0005] On one hand, this application provides a circuit breaker device, including a circuit breaker and a torque monitoring module; wherein, the circuit breaker is provided with a terminal block, the terminal block including a terminal frame, a terminal plate and a fastening element, the fastening element being disposed on the terminal frame, the terminal frame being sleeved on the terminal plate, and the fastening element being used to connect wires to the terminal plate; the torque monitoring module is connected to the circuit breaker, and the torque monitoring module is used to monitor the wiring status of the circuit breaker; the torque monitoring module includes a sensing element, the sensing element being a pressure-sensitive material, the sensing element being disposed on the terminal plate and abutting against the fastening element, the sensing element being used to monitor the torque of the fastening element, and the sensing element also being used to output a voltage signal based on the torque monitoring status of the fastening element, so that the torque monitoring module determines the wiring status of the circuit breaker based on the voltage signal.
[0006] In one embodiment, the torque monitoring module further includes a signal processing element; wherein the signal processing element is connected to the sensing element, and the signal processing element is used to receive the voltage signal output by the sensing element and determine the wiring status of the circuit breaker based on the voltage value carried by the voltage signal.
[0007] In one embodiment, the signal processing element is further configured to compare the voltage value with a wiring threshold and determine the wiring status of the circuit breaker based on the comparison result; when the voltage value is less than the wiring threshold, it is determined that the circuit breaker wiring is abnormal; when the voltage value is greater than or equal to the wiring threshold, it is determined that the circuit breaker wiring is good.
[0008] In one embodiment, the torque monitoring module further includes an indicator light element; wherein the indicator light element is connected to a signal processing element; the signal processing element is also used to control the display state of the indicator light element according to the wiring status of the circuit breaker; when the circuit breaker wiring is good, the indicator light element is controlled to be in a first display state; when the circuit breaker wiring is abnormal, the indicator light element is controlled to switch from the first display state to a second display state.
[0009] In one embodiment, the torque monitoring module further includes a power supply element; wherein the power supply element is electrically connected to the circuit breaker and connected to the signal processing element, and the power supply element is used to supply power to the signal processing element.
[0010] In one embodiment, the sensing element is a piezoelectric ceramic or a quartz crystal.
[0011] In one embodiment, the torque monitoring module is integrated with the circuit breaker.
[0012] On the other hand, this application also provides a torque monitoring module, including a sensing element, a signal processing element, an indicator light element, and a power supply element; wherein, the sensing element is used to monitor the torque of the fastening element in the circuit breaker, and outputs a voltage signal based on the torque monitoring of the fastening element, the fastening element is used to connect the wire to the circuit breaker, and the voltage signal carries a voltage value; the signal processing element is connected to the sensing element, and is used to receive the voltage signal output by the sensing element, compare the voltage value with a wiring threshold, and determine the wiring status of the circuit breaker based on the comparison result; the indicator light element is connected to the signal processing element, and the signal processing element is also used to control the display status of the indicator light element according to the wiring status of the circuit breaker; the power supply element is electrically connected to the circuit breaker, and the power supply element is also connected to the signal processing element, and the power supply element is used to supply power to the signal processing element.
[0013] Furthermore, this application also provides a circuit breaker wiring status monitoring method, applied to a torque monitoring module. The circuit breaker wiring status monitoring method includes:
[0014] The torque value of the fastening element in the circuit breaker is monitored by a sensing element, and a voltage signal is output based on the torque monitoring of the fastening element; wherein, the fastening element is used to connect the wire to the circuit breaker, and the voltage signal carries the voltage value.
[0015] The circuit breaker receives the voltage signal output by the sensing element through the signal processing element, compares the voltage value with the wiring threshold, and determines the wiring status of the circuit breaker based on the comparison result.
[0016] In one embodiment, comparing a voltage value with a wiring threshold and determining the wiring status of the circuit breaker based on the comparison result includes:
[0017] When the voltage value is less than the wiring threshold, it is determined that the circuit breaker wiring is abnormal;
[0018] When the voltage value is greater than or equal to the wiring threshold, the circuit breaker is considered to be properly wired.
[0019] This application provides a circuit breaker device, including a circuit breaker and a torque monitoring module. The circuit breaker has terminals, each including a wiring frame, a terminal block, and a fastening element. The fastening element is located on the wiring frame, which is fitted onto the terminal block. The fastening element connects the wires to the terminal block. The torque monitoring module is connected to the circuit breaker and includes a sensing element made of a pressure-sensitive material. The sensing element is located on the terminal block and abuts against the fastening element. The sensing element monitors the torque value of the fastening element and converts the monitored torque value into a voltage value, allowing the torque monitoring module to determine the circuit breaker's wiring status based on the voltage value. Therefore, this application, by setting a torque monitoring module, monitors the circuit breaker's wiring status, greatly improving circuit safety. Attached Figure Description
[0020] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly described below.
[0021] Figure 1 This is a schematic diagram of the structure of a circuit breaker device provided in an embodiment of this application;
[0022] Figure 2 A schematic diagram of a circuit breaker device provided in an embodiment of this application;
[0023] Figure 3 This is a schematic diagram of the structure of a circuit breaker device provided in an embodiment of this application;
[0024] Figure 4 This is a schematic diagram of the structure of a wiring terminal provided in an embodiment of this application;
[0025] Figure 5 An exploded view of a wiring terminal provided in an embodiment of this application;
[0026] Figure 6 A schematic diagram of a circuit breaker device provided in an embodiment of this application;
[0027] Figure 7 This is a flowchart illustrating a circuit breaker wiring status monitoring method provided in an embodiment of this application.
[0028] Figure label:
[0029] 10-Circuit breaker; 11-Terminal block; 111-Fastening element; 112-Connecting frame; 113-Connecting board; 114-First mounting hole; 115-Mounting protrusion; 12-Housing; 20-Torque monitoring module; 21-Sensing element; 211-Second mounting hole; 22-Signal processing element; 23-Indicator light element; 24-Power supply element; 100-Circuit breaker. Detailed Implementation
[0030] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.
[0031] Similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this application, terms such as "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0032] Please refer to Figure 1 This is a schematic diagram of the structure of a circuit breaker device provided in an embodiment of this application. Figure 1 As shown, the circuit breaker 100 includes a circuit breaker 10 and a torque monitoring module 20. The torque monitoring module 20 is connected to the circuit breaker 10 and is used to monitor the wiring status of the circuit breaker 10. Figure 1 To facilitate the demonstration of the connection between the circuit breaker 10 and the torque monitoring module 20, only the external structure of the circuit breaker 10 is shown, and the internal structure of the circuit breaker 10 is not shown in detail.
[0033] In one embodiment, the circuit breaker 10 is a miniature circuit breaker or a plastic-case circuit breaker.
[0034] Please refer to Figure 2 This is a schematic diagram of a circuit breaker device provided in an embodiment of this application. Figure 2 As shown, in the circuit breaker 100, the torque monitoring module 20 can be integrated as a separate accessory and connected to the circuit breaker 10.
[0035] In another embodiment, in the circuit breaker 100, the torque monitoring module 20 is integrated inside the circuit breaker 10, that is, the torque monitoring module 20 is integrally connected with the circuit breaker 10.
[0036] Please refer to Figure 3 This is a schematic diagram of the structure of a circuit breaker device provided in an embodiment of this application. Please refer to... Figure 4 This is a schematic diagram of the structure of a wiring terminal provided in an embodiment of this application. Please refer to... Figure 5 This is an exploded view of a wiring terminal provided in an embodiment of this application.
[0037] The circuit breaker 10 is provided with a terminal block 11, which is located inside the housing 12. The terminal block includes a terminal frame 112, a terminal block 113, and a fastening element 111. The fastening element 111 is located on the terminal frame 112 and is used to connect the wire to the terminal block 113. The terminal frame 112 is provided with a first mounting hole 114, which is a threaded structure. The fastening element 111 is fixed to the terminal frame 112 by threading into the first mounting hole 114. The terminal block 113 is fixed to the housing 12, and the terminal frame 112 is fitted onto the terminal block 113.
[0038] In one embodiment, the fastening element 111 is a screw.
[0039] During the operation, the circuit maintenance personnel place the wire into the terminal block 112 and use a torque screwdriver to screw the fastening element 111 into the first mounting hole 114. As the fastening element 111 is tightened, the terminal block 112 moves upward relative to the terminal plate 113. As the terminal block 112 moves, the wire gradually approaches the terminal plate 113. When the fastening element 111 is tightened in the first mounting hole 114, the wire is pressed into the terminal block 112 by the terminal plate 113. When the wire is pressed into the terminal block 112, the wiring work for the circuit breaker 10 is completed.
[0040] This shows that the tightening torque of the fastening element 111 is related to the wiring status of the circuit breaker 10. Therefore, the torque monitoring module 20 can monitor the wiring status of the circuit breaker 10 by monitoring the tightening torque of the fastening element 111.
[0041] The torque monitoring module 20 includes a sensing element 21, which is mounted on the terminal block 113. When the fastening element 111 is tightened in the terminal frame 112, the sensing element 21 abuts against the fastening element 111. The sensing element 21 is used to monitor the torque of the fastening element 111 and is made of pressure-sensitive material. The terminal block 113 has a mounting protrusion 115, and the sensing element 21 has a second mounting hole 211. The sensing element 21 is fixed to the terminal block 113 through the mounting protrusion 115 and the second mounting hole 211.
[0042] The pressure-sensitive material exhibits a positive piezoelectric effect, meaning that when the pressure-sensitive material is deformed by external force, an electric charge is generated on its surface; when the external force is removed, the surface returns to a non-charged state. Therefore, the sensing element 21 can monitor the torque of the fastening element 111 based on the above characteristics, and output a voltage signal based on the torque monitoring of the fastening element 111, so that the torque monitoring module 20 can determine the wiring status of the circuit breaker 10 based on the voltage signal.
[0043] During operation, as the circuit maintenance personnel tighten the fastening element 111 into the first mounting hole 114, the fastening element 111 converts the torque it receives into stress, which is then applied to the sensing element 21, causing the sensing element 21 to deform under the stress. After deformation, the sensing element 21 generates a voltage signal, enabling the torque monitoring module 20 to monitor the wiring status of the circuit breaker 10 based on the voltage signal.
[0044] In this application, the torque of the fastening element 111 is monitored by the sensing element 21 in the torque monitoring module 20, and a voltage signal is output based on the torque monitoring of the fastening element 111. This allows the torque monitoring module 20 to determine the wiring status of the circuit breaker 10 based on the voltage signal, which greatly improves the safety performance of the line.
[0045] Please refer to Figure 6 This is a schematic diagram of a circuit breaker device provided in an embodiment of this application. Figure 6 As shown, the torque monitoring module 20 also includes a signal processing element 22; wherein, the signal processing element 22 is connected to the sensing element 21, specifically, the signal processing element 22 is electrically connected to the sensing element 21; the signal processing element 22 is used to receive the voltage signal output by the sensing element 21, and determine the wiring status of the circuit breaker 10 based on the voltage value carried by the voltage signal.
[0046] During operation, after the sensing element 21 generates a voltage signal, it sends the voltage signal to the signal processing element 22. After receiving the voltage signal, the signal processing element 22 analyzes the voltage signal, extracts the voltage value carried in the voltage signal, and determines the wiring status of the circuit breaker 10 based on the voltage value.
[0047] In one embodiment, the signal processing element 22 stores a wiring threshold, which can be used to compare the voltage value with the wiring threshold and determine the wiring status of the circuit breaker 10 based on the comparison result. When the voltage value is less than the wiring threshold, it is determined that the circuit breaker 10 is abnormally wired; when the voltage value is greater than or equal to the wiring threshold, it is determined that the circuit breaker 10 is properly wired.
[0048] The wiring threshold is the voltage value output by the sensing element 21 when the fastening element 111 is under rated torque conditions. Therefore, when the signal processing element 22 detects that the voltage value output by the sensing element is less than the wiring threshold, it indicates that the fastening element 111 is loose and there is a wiring abnormality in the circuit breaker 10.
[0049] In one embodiment, the wiring threshold can be determined using the following formula (1) based on the characteristics of the pressure-sensitive material:
[0050] Q = pF 应 (1)
[0051] Where p is the piezoelectric voltage constant, Q is the voltage gradient output by the sensing element 21, and the voltage gradient Q can be determined by the following formula (2), F 应 To apply stress to the sensing element 21, F 应 It can be determined by the following formula (3);
[0052]
[0053] Where U is the output voltage of sensing element 21, and h is the thickness of sensing element 21;
[0054]
[0055] Among them, F 应 The stress applied to the sensing element 21 is A, where A is the cross-sectional area of the contact between the fastening element 111 and the sensing element 21, and F is the cross-sectional area of the contact between the fastening element 111 and the sensing element 21. 轴 F is the axial force of the fastening element 111. 轴 It can be determined by the following formula (4);
[0056]
[0057] Where k is the torque coefficient of fastening element 111, d is the nominal diameter of fastening element 111, and T is the torque of fastening element 111;
[0058] Substituting formulas (2), (3), and (4) into formula (1), we can obtain the relationship between the fastening torque of fastening element 111 and the output voltage of sensing element 21 as follows:
[0059]
[0060] Therefore, based on formula (5) and the rated torque of fastening element 111, the corresponding wiring threshold can be calculated, allowing signal processing element 22 to determine the wiring status of circuit breaker 10 based on the wiring threshold. The rated torque of fastening element 111 can be determined based on its type. For example, when fastening element 111 is a screw, the rated torque can be determined based on the screw type; for an M6 screw, the rated torque can be 2.5 N·m.
[0061] In one embodiment, the thickness of the sensing element 21 is 0.8 mm.
[0062] In one embodiment, the torque monitoring module 20 further includes an indicator light element 23; wherein the indicator light element 23 is connected to the signal processing element 22; specifically, the indicator light element 23 and the signal processing element 22 are electrically connected. In this case, the signal processing element 22 can control the display state of the indicator light element 23 according to the wiring status of the circuit breaker 10. When the circuit breaker 10 is properly wired, the signal processing element 22 can control the indicator light element 23 to a first display state; when the circuit breaker 10 is improperly wired, it controls the indicator light element 23 to switch from the first display state to a second display state.
[0063] In one embodiment, the indicator element 23 is an LED light.
[0064] During operation, while the circuit breaker 10 is working, the sensing element 21 monitors the torque of the fastening element 111 in real time and outputs a voltage signal based on the monitoring results. The signal processing element 22 receives the voltage signal output by the fastening element 111 in real time, analyzes the voltage signal, extracts the voltage value carried by the voltage signal, compares the voltage value with the wiring threshold after successful analysis, and determines the wiring status of the circuit breaker 10 based on the comparison result. After determining the wiring status of the circuit breaker 10, the signal processing element 22 can control the display status of the indicator light element 23 according to the wiring status of the circuit breaker 10. When the circuit breaker 10 is properly wired, the signal processing element 22 can control the indicator light element 23 to display green; when the circuit breaker 10 is improperly wired, the signal processing element 22 can control the indicator light element 23 to change from green to red.
[0065] Through the above measures, the signal processing element 22 controls the display status of the indicator light element 23 according to the wiring status of the circuit breaker 10, so that circuit maintenance personnel can determine the wiring status of the circuit breaker 10 according to the display status of the indicator light element 23, which facilitates timely maintenance of the circuit and improves the safety performance of the circuit.
[0066] In one embodiment, the torque monitoring module 20 further includes a power supply element 24; wherein the power supply element 24 is connected to the circuit breaker 10 and to the signal processing element 22; specifically, the power supply element 24 is electrically connected to the signal processing element 22 and the circuit breaker 10, and the power supply element 24 is connected to the power supply line of the circuit breaker 10. The power supply element 24 is used to supply power to the signal processing element 22, enabling the signal processing element 22 to operate normally.
[0067] Please refer to Figure 7 This is a flowchart illustrating a circuit breaker wiring status monitoring method provided in an embodiment of this application. The method is applied in the torque monitoring module 20.
[0068] Step S210: Monitor the torque value of the fastening element in the circuit breaker by means of a sensing element, and convert the torque value into a voltage value; wherein, the fastening element is used to connect the wire to the circuit breaker.
[0069] In this step, the sensing element monitors the torque value of the fastening element 111 in real time, outputs a voltage signal based on the monitoring result, and sends the voltage signal to the signal processing element 22. The voltage signal carries the voltage value.
[0070] Step S220: Receive the voltage value output by the sensing element through the signal processing element, compare the voltage value with the wiring threshold, and determine the wiring status of the circuit breaker based on the comparison result.
[0071] The signal processing element 22 receives the voltage signal output by the fastening element 111 in real time, analyzes the voltage signal to extract the voltage value it carries, and compares the voltage value with the wiring threshold after successful analysis. Based on the comparison result, it determines the wiring status of the circuit breaker 10. When the signal processing element 22 detects that the voltage value output by the sensing element 21 is less than the wiring threshold, it determines that the circuit breaker 10 is abnormally wired; when the signal processing element 22 detects that the voltage value output by the sensing element 21 is greater than or equal to the wiring threshold, it determines that the circuit breaker 10 is properly wired.
[0072] After determining the wiring status of circuit breaker 10, signal processing element 22 can also control the display status of indicator light element 23 according to the wiring status of circuit breaker 10. When the wiring of circuit breaker 10 is good, signal processing element 22 controls indicator light element 23 to be in the first display status; when the wiring of circuit breaker 10 is abnormal, signal processing element 22 controls indicator light element 23 to switch from the first display status to the second display status.
[0073] For example, when the circuit breaker 10 is properly wired, the signal processing element 22 can control the indicator light element 23 to display green; when the circuit breaker 10 is improperly wired, the signal processing element 22 can control the indicator light element 23 to change from green to red.
[0074] The apparatuses and methods disclosed in the several embodiments provided in this application can also be implemented in other ways. The apparatus embodiments described above are merely illustrative. For example, the flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of apparatuses, methods, and computer program products according to various embodiments of this application. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code, which contains one or more executable instructions for implementing a specified logical function. In some alternative implementations, the functions marked in the blocks may occur in a different order than those marked in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram and / or flowchart, and combinations of blocks in block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions.
[0075] In addition, the functional modules in the various embodiments of this application can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.
[0076] If a function is implemented as a software module and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as a USB flash drive, a portable hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.
Claims
1. A circuit breaker device, characterized in that, include: A circuit breaker, wherein the circuit breaker is provided with a terminal block, the terminal block including a terminal frame, a terminal plate and a fastening element, the fastening element being disposed on the terminal frame, the terminal frame being sleeved on the terminal plate, and the fastening element being used to connect a wire to the terminal plate; A torque monitoring module, connected to the circuit breaker, is used to monitor the wiring status of the circuit breaker; The torque monitoring module includes a sensing element made of pressure-sensitive material. The sensing element is disposed on the terminal block and abuts against the fastening element. The sensing element is used to monitor the torque of the fastening element. The sensing element is also used to output a voltage signal based on the torque monitoring of the fastening element, so that the torque monitoring module can determine the wiring status of the circuit breaker based on the voltage signal; The torque monitoring module also includes: A signal processing element, connected to the sensing element, is used to receive the voltage signal output by the sensing element and determine the wiring status of the circuit breaker based on the voltage value carried by the voltage signal. The signal processing element is also used for: The voltage value is compared with the wiring threshold, and the wiring status of the circuit breaker is determined based on the comparison result; When the voltage value is less than the wiring threshold, it is determined that the circuit breaker wiring is abnormal; When the voltage value is greater than or equal to the wiring threshold, it is determined that the circuit breaker is properly wired; The signal processing element stores wiring thresholds.
2. The circuit breaker according to claim 1, characterized in that, The torque monitoring module also includes: An indicator light element is connected to the signal processing element; The signal processing element is also used for: The display status of the indicator light element is controlled according to the wiring status of the circuit breaker; When the circuit breaker is properly wired, the indicator light element is controlled to be in the first display state; When the circuit breaker wiring is abnormal, the indicator light element is controlled to switch from the first display state to the second display state.
3. The circuit breaker according to claim 1, characterized in that, The torque monitoring module also includes: A power supply element is electrically connected to the circuit breaker and to the signal processing element, the power supply element being used to supply power to the signal processing element.
4. The circuit breaker according to claim 1, characterized in that, The sensing element is a piezoelectric ceramic or a quartz crystal.
5. The circuit breaker according to claim 1, characterized in that, The torque monitoring module is integrated with the circuit breaker.
6. A torque monitoring module, characterized in that, include: A sensing element is used to monitor the torque of a fastening element in a circuit breaker and output a voltage signal based on the torque monitoring of the fastening element; wherein the fastening element is used to connect a wire to the circuit breaker, and the voltage signal carries a voltage value. A signal processing element, connected to the sensing element, is used to receive the voltage signal output by the sensing element, compare the voltage value with a wiring threshold, and determine the wiring status of the circuit breaker based on the comparison result; When the voltage value is less than the wiring threshold, it is determined that the circuit breaker wiring is abnormal; When the voltage value is greater than or equal to the wiring threshold, it is determined that the circuit breaker is properly wired; An indicator light element is connected to the signal processing element; The signal processing element is also used to control the display status of the indicator light element according to the wiring status of the circuit breaker; A power supply element is electrically connected to the circuit breaker and to the signal processing element, and is used to supply power to the signal processing element; The signal processing element stores wiring thresholds.
7. A method for monitoring the wiring status of a circuit breaker, characterized in that, Applied to torque monitoring modules, including: The torque of the fastening element in the circuit breaker is monitored by a sensing element, and a voltage signal is output based on the torque monitoring of the fastening element; wherein the fastening element is used to connect the wire to the circuit breaker, and the voltage signal carries a voltage value. The signal processing element receives the voltage signal output by the sensing element, compares the voltage value with the wiring threshold, and determines the wiring status of the circuit breaker based on the comparison result. The step of comparing the voltage value with a wiring threshold and determining the wiring status of the circuit breaker based on the comparison result includes: When the voltage value is less than the wiring threshold, it is determined that the circuit breaker wiring is abnormal; When the voltage value is greater than or equal to the wiring threshold, it is determined that the circuit breaker is properly wired; The signal processing element stores wiring thresholds.
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