Breaker running-in aging detection device

Abstract

The utility model provides a breaker running-in aging detection device, which comprises a control module, a power supply module, a voltage switching module and a breaker control module which are fixedly packaged in a device box body, the breaker control module is connected with a breaker to be detected, and the control module is respectively connected with the voltage switching module and the breaker control module. The voltage switching module is connected with the circuit breaker control module and is used for responding to a voltage switching signal output by the control module and outputting different levels of control voltages to the circuit breaker control module; and the circuit breaker control module is used for responding to the detection control signal output by the control module and controlling the closing or opening of the to-be-detected circuit breaker based on the control voltage. According to the utility model, various voltage conditions possibly faced by the circuit breaker in actual operation can be comprehensively simulated, the comprehensiveness and effectiveness of the test are greatly improved, and the test requirements of different types of circuit breakers can be met at the same time.

Description

Technical Field

[0001] This utility model belongs to the field of circuit breaker testing technology, specifically relating to a circuit breaker break-in and aging testing device. Background Technology

[0002] As a critical protection and control device in the power distribution network, the reliability of circuit breakers directly affects the safe and stable operation of the entire power grid. With the in-depth application of primary and secondary integration technology, circuit breakers not only need to perform basic opening and closing functions, but also need to seamlessly connect with secondary measurement and control equipment. This places more stringent demands on the performance and lifespan of circuit breakers, thus leading to the development of circuit breaker run-in and aging testing devices. However, traditional circuit breaker run-in and aging devices typically only perform run-in tests in a fixed voltage mode. Traditional devices usually use a single fixed voltage for testing, which cannot simulate various voltage fluctuations that may be encountered in actual operation, and is also difficult to adapt to the testing requirements of different types of circuit breakers. In particular, the compatibility of traditional devices is poor for circuit breakers with new permanent magnet operating mechanisms. Utility Model Content

[0003] This invention provides a circuit breaker break-in and aging detection device to solve the problems mentioned above.

[0004] In a first aspect, this utility model provides a circuit breaker break-in aging detection device. The device includes a control module, a power supply module, a voltage switching module, and a circuit breaker control module, all fixedly encapsulated within a device housing. The circuit breaker control module is connected to the circuit breaker under test. The power supply module is connected to the control module, the voltage switching module, and the circuit breaker control module and is used for power supply. The control module is connected to both the voltage switching module and the circuit breaker control module. The voltage switching module is connected to the circuit breaker control module. The voltage switching module is used to respond to the voltage switching signal output by the control module and output different levels of control voltage to the circuit breaker control module. The circuit breaker control module is used to respond to the detection control signal output by the control module and control the closing or opening of the circuit breaker under test based on the control voltage.

[0005] Optionally, the voltage switching module includes four sets of voltage output circuits. The control module is connected to the input terminal of all voltage output circuits, and the output terminal of all voltage output circuits is connected to the circuit breaker control module. The control module is used to output voltage switching signals to the four sets of voltage output circuits so that the four sets of voltage output circuits output different levels of control voltage respectively.

[0006] Optionally, the control module outputs a voltage switching signal to only one of the voltage output circuits within the same test cycle.

[0007] Optionally, the four sets of voltage output circuits output control voltages of 15.6V, 20.4V, 24V and 26.4V respectively.

[0008] Optionally, the voltage output circuit includes a first resistor, a first optocoupler, a first diode, a second diode, and a first relay. One end of the first resistor is connected to the control module, and the other end is connected to the anode of the LED in the first optocoupler. The cathode of the LED in the first optocoupler is grounded. The collector of the phototransistor in the first optocoupler is connected to the 24V power output terminal of the power supply module. The emitter of the phototransistor in the first optocoupler is connected to the anode of the first diode. The cathode of the first diode is connected to the cathode of the second diode and one end of the coil of the first relay, respectively. The anode of the second diode and the coil of the first relay are both grounded. One end of the normally open contact of the first relay is connected to the control voltage input source, and the other end is connected to the circuit breaker control module.

[0009] Optionally, the circuit breaker control module includes a circuit breaker closing circuit and a circuit breaker opening circuit. The signal input terminals of both the circuit breaker closing circuit and the circuit breaker opening circuit are connected to the control module. The voltage input terminals of both the circuit breaker closing circuit and the circuit breaker opening circuit are connected to the output terminal of the voltage switching module. The output terminals of both the circuit breaker closing circuit and the circuit breaker opening circuit are connected to the control coil of the circuit breaker under test. The circuit breaker closing circuit is used to respond to the detection control signal output by the control module and control the closing of the circuit breaker under test through the control coil based on the control voltage. The circuit breaker opening circuit is used to respond to the detection control signal output by the control module and control the opening of the circuit breaker under test through the control coil based on the control voltage.

[0010] Optionally, the circuit breaker closing circuit includes a second resistor, a second optocoupler, a third diode, a manual closing switch, a fourth diode, and a second relay. One end of the second resistor is connected to the control module, and the other end is connected to the anode of the LED in the second optocoupler. The cathode of the LED in the second optocoupler is grounded. The collector of the phototransistor in the second optocoupler is connected to the 24V power output terminal of the power supply module and one end of the manual closing switch, respectively. The other end of the manual closing switch is connected to the cathode of the third diode. The emitter of the phototransistor in the second optocoupler is connected to the anode of the third diode. The cathode of the third diode is also connected to the cathode of the fourth diode and one end of the control coil of the second relay, respectively. The anode of the fourth diode and the other end of the control coil of the second relay are both grounded. One end of the normally open contact of the second relay is connected to the output terminal of the voltage switching module, and the other end is connected to the control coil of the circuit breaker under test.

[0011] Optionally, the circuit breaker tripping circuit includes a third resistor, a third optocoupler, a fifth diode, a manual tripping switch, a sixth diode, and a third relay. One end of the third resistor is connected to the control module, and the other end is connected to the anode of the LED in the third optocoupler. The cathode of the LED in the third optocoupler is grounded. The collector of the phototransistor in the third optocoupler is connected to the 24V power output terminal of the power supply module and one end of the manual tripping switch. The other end of the manual tripping switch is connected to the cathode of the fifth diode. The emitter of the phototransistor in the third optocoupler is connected to the anode of the fifth diode. The cathode of the fifth diode is also connected to the cathode of the sixth diode and one end of the control coil of the third relay. The anode of the sixth diode and the other end of the control coil of the third relay are both grounded. One end of the normally open contact of the third relay is connected to the output terminal of the voltage switching module, and the other end is connected to the control coil of the circuit breaker under test.

[0012] Optionally, the device further includes a position signal monitoring module. The input terminal of the position signal monitoring module is connected to the output terminal of the circuit breaker control module, and the output terminal of the position signal monitoring module is connected to the control module. The position signal monitoring module is used to feed back the position status of the circuit breaker to be tested to the control module. The position status includes closed position, open position, and no energy storage position.

[0013] Optionally, the device further includes a liquid crystal display module, which is connected to both the power supply module and the control module. The power supply module supplies power to the liquid crystal display module, and the liquid crystal display module receives and displays the position status from the control module via a serial interface.

[0014] The beneficial effects of this utility model are:

[0015] This utility model provides a circuit breaker break-in aging testing device that innovatively designs a collaborative working mechanism among a control module, power supply module, voltage switching module, and circuit breaker control module. This enables multi-voltage level break-in aging testing of circuit breakers, offering significant technical advantages and practical value compared to traditional technologies. Firstly, this device overcomes the limitation of traditional break-in aging devices that can only perform fixed-voltage mode testing. Through the voltage switching module, it can respond to the control module's commands by outputting different levels of control voltage, allowing the testing process to comprehensively simulate various voltage conditions that the circuit breaker may face in actual operation, greatly improving the comprehensiveness and effectiveness of the test. Secondly, this device can adapt to the testing needs of different types of circuit breakers, especially achieving good compatibility with circuit breakers using new permanent magnet operating mechanisms, thus expanding the device's application range. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the circuit breaker break-in and aging detection device in one embodiment of this application.

[0017] Figure 2 This is a circuit diagram of the voltage switching module in one embodiment of this application.

[0018] Figure 3 This is a circuit diagram of the circuit breaker control module in one embodiment of this application.

[0019] Figure 4 This is a circuit diagram of the signal input interface in one embodiment of this application.

[0020] Figure 5 This is a circuit diagram of the power processing circuit in one embodiment of this application.

[0021] Figure 6 This is a circuit diagram of the signal processing circuit in one embodiment of this application. Detailed Implementation

[0022] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0023] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0024] Reference Figure 1The circuit breaker break-in and aging testing device disclosed in this application mainly consists of four core components: a control module, a power supply module, a voltage switching module, and a circuit breaker control module. These modules are fixedly encapsulated in a unified device housing, forming a complete functional system. In terms of overall architecture, the power supply module acts as the energy center, providing the necessary power supply to the control module, voltage switching module, and circuit breaker control module to ensure the normal operation of the entire system. The control module, as the system's brain, is responsible for sending voltage switching signals to the voltage switching module and detection control signals to the circuit breaker control module, coordinating the entire system's workflow. The voltage switching module is the core innovation of this device; it can respond to the voltage switching signals from the control module and output different levels of control voltage to the circuit breaker control module, achieving flexible voltage switching. The circuit breaker control module is directly connected to the circuit breaker under test, controlling it to perform closing or opening operations based on the detection control signals from the control module and the control voltage provided by the voltage switching module.

[0025] In one embodiment, reference is made to Figure 2 The voltage switching module comprises four sets of voltage output circuits. The inputs of these circuits are all connected to the control module, while their outputs are all connected to the circuit breaker control module. The control module can selectively activate any one of these four sets of voltage output circuits by sending voltage switching signals, thereby achieving different levels of control voltage output. To ensure the accuracy and safety of the test, the control module only sends voltage switching signals to one set of voltage output circuits within the same test cycle, avoiding voltage instability or circuit interference caused by multiple circuits operating simultaneously. These four sets of voltage output circuits are designed to output control voltages of 15.6V, 20.4V, 24V, and 26.4V, respectively. These voltage values ​​can cover various voltage conditions that the circuit breaker may encounter in actual operation, especially the operating voltage requirements of different types of circuit breaker mechanisms (such as spring-operated mechanisms and permanent magnet operating mechanisms).

[0026] like Figure 2As shown, taking a voltage output circuit that outputs a 15.6V control voltage as an example, the voltage output circuit mainly consists of a first resistor R35, a first optocoupler U11, a first diode D10, a second diode D11, and a first relay K12. Its working principle is as follows: When the control module outputs a high-level voltage switching signal, it is connected to the anode of the LED in the first optocoupler U11 through the first resistor R35. The cathode of the LED is grounded, forming a path that causes the LED to emit light. After the LED emits light, the phototransistor in the first optocoupler U11 conducts, its collector is connected to the 24V power output terminal of the power supply module, and its emitter is connected to the anode of the first diode D10. Current flows through the first diode D10 and then from its cathode to the coil of the first relay K12. Simultaneously, the cathode of the second diode D11 is also connected here. However, since the anode of the second diode D11 is grounded, it does not conduct under forward current, mainly serving a protective function to prevent the reverse electromotive force generated when the relay coil is de-energized from damaging the circuit. When current flows through the coil of the first relay K12, the relay is activated, its normally open contacts close, and a specific control voltage input source is connected to the circuit breaker control module, thereby achieving a specific voltage level output. This circuit design employs opto-isolation technology, effectively preventing interference between the control circuit and the power circuit, and improving the stability and safety of the system.

[0027] In practical applications, the workflow of this device can be summarized as follows: First, the operator sets the test parameters through the control module, including the test voltage level, number of tests, and test interval. Then, based on the set parameters, the control module sends a corresponding voltage switching signal to the voltage switching module, selecting and activating a specific voltage output circuit. Next, the activated voltage output circuit outputs a preset control voltage to the circuit breaker control module. Simultaneously, the control module sends a detection control signal to the circuit breaker control module. Finally, based on the received detection control signal and control voltage, the circuit breaker control module controls the circuit breaker under test to perform a closing or opening operation, completing one test cycle. By repeating this process and switching different voltage levels in different test cycles, the performance and reliability of the circuit breaker under various voltage conditions can be comprehensively evaluated.

[0028] By employing four sets of output circuits with different voltage levels, this device enables flexible switching between four control voltages: 15.6V, 20.4V, 24V, and 26.4V, overcoming the limitation of traditional devices that can only perform tests at fixed voltages. In practical applications, this device can flexibly set test parameters according to the characteristics of different circuit breaker models. For example, for circuit breakers with spring-operated mechanisms, the focus can be on testing their performance under rated voltage (24V) and undervoltage (20.4V) conditions; while for circuit breakers with permanent magnet operating mechanisms, the focus can be on testing their operating states under higher voltage (26.4V) and lower voltage (15.6V) conditions. This multi-voltage testing mode can comprehensively simulate various voltage conditions that circuit breakers may encounter in actual operation, including rated voltage, undervoltage, and overvoltage conditions, significantly improving the comprehensiveness and effectiveness of the test. Moreover, the ability to test at different voltage levels allows this device to adapt to the testing needs of different types of circuit breakers, especially achieving good compatibility with voltage-sensitive permanent magnet operating mechanism circuit breakers.

[0029] In one embodiment, reference is made to Figure 3 The circuit breaker control module consists of two main parts: a circuit breaker closing circuit and a circuit breaker opening circuit. The signal input terminals of both circuits are connected to the control module, the voltage input terminals are connected to the output terminals of the voltage switching module, and the output terminals are connected to the control coil of the circuit breaker under test. The circuit breaker closing circuit responds to the detection control signal output by the control module and, based on the control voltage provided by the voltage switching module, controls the circuit breaker under test to perform a closing operation via the control coil. The circuit breaker opening circuit, on the other hand, responds to the detection control signal output by the control module and, based on the control voltage, controls the circuit breaker under test to perform an opening operation via the control coil.

[0030] like Figure 3As shown, the circuit breaker closing circuit mainly consists of a second resistor R33, a second optocoupler U9, a third diode D6, a manual closing switch K8, a fourth diode D7, and a second relay K9. Its working principle is as follows: When the control module outputs a closing control signal, the signal is connected to the anode of the LED in the second optocoupler U9 through the second resistor R33. The cathode of the LED is grounded, forming a path to make the LED light up. After the LED lights up, the phototransistor in the second optocoupler U9 is turned on. Its collector is connected to the 24V power output terminal of the power supply module and one end of the manual closing switch K8, and its emitter is connected to the anode of the third diode D6. When the phototransistor is turned on, the current flows from the 24V power supply through the phototransistor and the third diode D6 to form a path. The cathode of the third diode D6 is also connected to the cathode of the fourth diode D7 and one end of the control coil of the second relay K9. After the current flows through the control coil of the second relay K9, the relay is activated, its normally open contact closes, and connects the output terminal of the voltage switching module to the control coil of the circuit breaker under test, thereby realizing the closing operation of the circuit breaker. At the same time, the anode of the fourth diode D7 is grounded and does not conduct during normal operation. It mainly plays a protective role, preventing the reverse electromotive force generated when the relay coil is de-energized from damaging the circuit. In addition, the design of the manual closing switch K8 provides operators with the possibility of manually controlling the circuit breaker to close, enhancing the flexibility and practicality of the device.

[0031] like Figure 3 As shown, the internal structure of the circuit breaker tripping circuit is similar to that of the closing circuit, mainly consisting of the third resistor R34, the third optocoupler U10, the fifth diode D8, the manual tripping switch K11, the sixth diode D9, and the third relay K10. Its working principle is as follows: When the control module outputs a trip control signal, the signal is connected to the anode of the LED in the third optocoupler U10 through the third resistor R34. The cathode of the LED is grounded, forming a path to make the LED light up. After the LED lights up, the phototransistor in the third optocoupler U10 is turned on. Its collector is connected to the 24V power output terminal of the power supply module and one end of the manual trip switch K11, and its emitter is connected to the anode of the fifth diode D8. When the phototransistor is turned on, the current flows from the 24V power supply through the phototransistor and the fifth diode D8 to form a path. The cathode of the fifth diode D8 is also connected to the cathode of the sixth diode D9 and one end of the control coil of the third relay K10. After the current flows through the control coil of the third relay K10, the relay is activated, its normally open contact closes, and connects the output terminal of the voltage switching module to the control coil of the circuit breaker under test, thereby realizing the trip operation of the circuit breaker. At the same time, the anode of the sixth diode D9 is grounded and does not conduct during normal operation. It mainly plays a protective role, preventing the reverse electromotive force generated when the relay coil is de-energized from damaging the circuit. Similar to the closing circuit, the opening circuit is also designed with a manual opening switch K11, providing operators with the possibility of manually controlling the circuit breaker to open.

[0032] In one implementation, such as Figure 1 As shown, the circuit breaker break-in and aging testing device also includes a position signal monitoring module and an LCD display module, effectively solving the technical problem that traditional circuit breaker testing devices cannot monitor and intuitively display the circuit breaker's operating status in real time. In terms of overall technical architecture, the position signal monitoring module, as the sensing unit for the circuit breaker's status, has its input terminal tightly connected to the output terminal of the circuit breaker control module, and its output terminal connected to the control module, forming a complete information feedback loop. The core function of the position signal monitoring module is to monitor and feedback the position status of the circuit breaker under test to the control module in real time. These statuses specifically include three key operating states: closed position, open position, and no-energy-stored position. When the circuit breaker is in the closed position, it indicates that its main contacts are closed and the circuit is conducting; when it is in the open position, it indicates that its main contacts are separated and the circuit is open; and the no-energy-stored position indicates that the circuit breaker's operating mechanism has not yet completed energy storage and cannot perform the next operation. The LCD display module is connected to both the power supply module and the control module. The power supply module provides a stable power supply to the LCD display module to ensure its normal operation. The control module transmits the circuit breaker's position status information to the LCD display module via a serial interface (such as SPI, I2C, or UART). The LCD display module receives this information and displays it clearly on the screen in graphical or textual form. This design not only improves the user-friendliness of the human-machine interface but also provides operators with a convenient means to monitor the circuit breaker's status in real time.

[0033] In the actual implementation plan, refer to Figures 4 to 6 The signal monitoring module includes a signal input interface, a power supply circuit, and a signal processing circuit, such as... Figure 4 As shown, the P4 interface is the signal input interface, with a total of 16 pins. Pins 1-4 are connected to FENW (open position signal), HEW (close position signal), CNW (no energy stored position signal), and CN+ signal, respectively; pins 5-8 are connected to POWER_24VD (24V power supply), 24VGND (power ground), HE-, and 24VGND; pins 9-16 are connected to control signals such as FEN-, HE+, and FEN+. This interface design allows various status and control signals from the circuit breaker to be introduced into the system in an orderly manner. The power supply processing circuit is as follows: Figure 5As shown, the external 24V power supply (POWER_24VD) first undergoes reverse protection via diode D1 to prevent circuit damage caused by incorrect wiring. Transformer T1 is connected after D1 for electrical isolation, which is crucial for safe operation in high-voltage environments. The transformer output is rectified by diode D2 and filtered by capacitors C31 and C32 to eliminate power ripple. The rectified and filtered voltage is then fed into voltage regulator chip U4 (possibly an LM7805 or similar device), converting the unstable input voltage into a stable 5V output (VCC5V). The input terminal (pin 1) of U4 is connected to GND, and the output terminal (pin 3) provides a stable 5V power supply. Capacitors CA1 and C26 further filter out high-frequency noise, ensuring the purity of the output power. This power supply design ensures the stable operation of the monitoring module in complex electrical environments.

[0034] The signal processing circuits corresponding to the three position signals—closed position (HE_W), open position (FEN_W), and no-energy-stored position (CN_W)—are as follows: Figure 6 As shown, these three circuits have similar structures and employ standardized signal processing schemes. Taking the closing position signal (HE_W) processing circuit as an example: the signal first enters the circuit through resistor R22, which limits current to prevent excessive current from damaging subsequent components. The signal then passes through a protection circuit composed of resistor R23 and Zener diode D3. This combination effectively suppresses overvoltage spikes and transient interference. Zener diode D3 does not conduct under normal operating voltage, but conducts when the voltage exceeds its breakdown voltage, clamping the excess voltage and protecting subsequent circuits. Capacitor C71 is connected between the signal line and ground, forming a low-pass filter to filter out high-frequency interference signals and improve the system's anti-interference capability.

[0035] The pre-processed signal enters optocoupler U6. The optocoupler is the core component of this circuit, containing an LED and a phototransistor. When a signal is received at the input, the LED illuminates, and the phototransistor conducts, achieving photoelectric conversion and electrical isolation of the signal. This isolation is crucial for preventing high-voltage interference and protecting low-voltage control circuits. The output (pin 4) of optocoupler U6 is connected to VCC3V3 (3.3V power supply) via pull-up resistor R21, forming a standard low-level active signal. When the circuit breaker is in the closed position, the corresponding position switch closes, the HE_W signal is valid, and the optocoupler output is pulled low, generating a low-level signal. When the circuit breaker is not in the closed position, the optocoupler is not conducting, and the output is pulled high to 3.3V by R21, presenting a high-level state.

[0036] The processing circuits for the open position signal (FEN_W) and the non-energized position signal (CN_W) are structurally identical to those for the closed position signal. They utilize optocouplers U7 and U8, along with corresponding protective resistors (R26, R30), voltage divider resistors (R27, R31), Zener diodes (D4, D5), filter capacitors (C72, C73), and pull-up resistors (R25, R29). The outputs of these three signal processing circuits are all active low-level signals, directly connected to the input port of the control system, enabling the microcontroller to monitor the three key position states of the circuit breaker in real time. Through these status signals, the control system can accurately determine whether the circuit breaker is currently in the closed, open, or non-energized state, providing precise status feedback for the circuit breaker's break-in and aging tests, ensuring the accuracy and safety of the testing process.

[0037] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of protection of this application is limited to these examples; within the framework of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of one or more embodiments of this application as described above, which are not provided in detail for the sake of brevity.

[0038] One or more embodiments in this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of this application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of one or more embodiments in this application should be included within the protection scope of this application.

Claims

1. A circuit breaker break-in and aging detection device, characterized in that, The device includes a control module, a power supply module, a voltage switching module, and a circuit breaker control module, all fixedly encapsulated within a device housing. The circuit breaker control module is connected to the circuit breaker under test. The power supply module is connected to the control module, the voltage switching module, and the circuit breaker control module, respectively, and is used for power supply. The control module is connected to both the voltage switching module and the circuit breaker control module. The voltage switching module is connected to the circuit breaker control module. The voltage switching module is used to respond to the voltage switching signal output by the control module and output different levels of control voltage to the circuit breaker control module. The circuit breaker control module is used to respond to the detection control signal output by the control module and control the closing or opening of the circuit breaker under test based on the control voltage.

2. The circuit breaker break-in and aging detection device according to claim 1, characterized in that, The voltage switching module includes four voltage output circuits. The control module is connected to the input terminal of all voltage output circuits, and the output terminal of all voltage output circuits is connected to the circuit breaker control module. The control module is used to output voltage switching signals to the four voltage output circuits so that the four voltage output circuits output different levels of control voltage respectively.

3. The circuit breaker break-in and aging detection device according to claim 2, characterized in that, The control module outputs a voltage switching signal to only one of the voltage output circuits within the same test cycle.

4. The circuit breaker break-in and aging detection device according to claim 2, characterized in that, The four voltage output circuits output control voltages of 15.6V, 20.4V, 24V and 26.4V respectively.

5. The circuit breaker break-in and aging detection device according to claim 2, characterized in that, The voltage output circuit includes a first resistor, a first optocoupler, a first diode, a second diode, and a first relay. One end of the first resistor is connected to the control module, and the other end is connected to the anode of the LED in the first optocoupler. The cathode of the LED in the first optocoupler is grounded. The collector of the phototransistor in the first optocoupler is connected to the 24V power output terminal of the power supply module. The emitter of the phototransistor in the first optocoupler is connected to the anode of the first diode. The cathode of the first diode is connected to the cathode of the second diode and one end of the coil of the first relay. The anode of the second diode and the coil of the first relay are both grounded. One end of the normally open contact of the first relay is connected to the control voltage input source, and the other end is connected to the circuit breaker control module.

6. The circuit breaker break-in and aging detection device according to claim 1, characterized in that, The circuit breaker control module includes a circuit breaker closing circuit and a circuit breaker opening circuit. The signal input terminals of both the circuit breaker closing and opening circuits are connected to the control module. The voltage input terminals of both the circuit breaker closing and opening circuits are connected to the output terminal of the voltage switching module. The output terminals of both the circuit breaker closing and opening circuits are connected to the control coil of the circuit breaker under test. The circuit breaker closing circuit is used to respond to the detection control signal output by the control module and control the circuit breaker under test to close via the control coil based on the control voltage. The circuit breaker opening circuit is used to respond to the detection control signal output by the control module and control the circuit breaker under test to open via the control coil based on the control voltage.

7. The circuit breaker break-in and aging detection device according to claim 5, characterized in that, The circuit breaker closing circuit includes a second resistor, a second optocoupler, a third diode, a manual closing switch, a fourth diode, and a second relay. One end of the second resistor is connected to the control module, and the other end is connected to the anode of the LED in the second optocoupler. The cathode of the LED in the second optocoupler is grounded. The collector of the phototransistor in the second optocoupler is connected to the 24V power output terminal of the power supply module and one end of the manual closing switch. The other end of the manual closing switch is connected to the cathode of the third diode. The emitter of the phototransistor in the second optocoupler is connected to the anode of the third diode. The cathode of the third diode is also connected to the cathode of the fourth diode and one end of the control coil of the second relay. The anode of the fourth diode and the other end of the control coil of the second relay are both grounded. One end of the normally open contact of the second relay is connected to the output terminal of the voltage switching module, and the other end is connected to the control coil of the circuit breaker under test.

8. The circuit breaker break-in and aging detection device according to claim 5, characterized in that... The circuit breaker tripping circuit includes a third resistor, a third optocoupler, a fifth diode, a manual tripping switch, a sixth diode, and a third relay. One end of the third resistor is connected to the control module, and the other end is connected to the anode of the LED in the third optocoupler. The cathode of the LED in the third optocoupler is grounded. The collector of the phototransistor in the third optocoupler is connected to the 24V power output terminal of the power supply module and one end of the manual tripping switch. The other end of the manual tripping switch is connected to the cathode of the fifth diode. The emitter of the phototransistor in the third optocoupler is connected to the anode of the fifth diode. The cathode of the fifth diode is also connected to the cathode of the sixth diode and one end of the control coil of the third relay. The anode of the sixth diode and the other end of the control coil of the third relay are both grounded. One end of the normally open contact of the third relay is connected to the output terminal of the voltage switching module, and the other end is connected to the control coil of the circuit breaker under test.

9. The circuit breaker break-in and aging detection device according to claim 1, characterized in that, The device also includes a position signal monitoring module. The input terminal of the position signal monitoring module is connected to the output terminal of the circuit breaker control module, and the output terminal of the position signal monitoring module is connected to the control module. The position signal monitoring module is used to feed back the position status of the circuit breaker to be detected to the control module. The position status includes closed position, open position, and no energy storage position.

10. The circuit breaker break-in and aging detection device according to claim 9, characterized in that, The device also includes a liquid crystal display module, which is connected to both the power supply module and the control module. The power supply module supplies power to the liquid crystal display module, and the liquid crystal display module receives and displays the position status from the control module via a serial interface.

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