A comprehensive testing equipment and method for circuit breakers

Abstract

This invention relates to the field of circuit breaker testing technology, and provides a comprehensive circuit breaker testing equipment and method, including a test bench, a base plate and an outer frame mounted on the test bench surface, and a working panel rotatably mounted on the base plate for placing the circuit breaker. A temperature-measuring magnetic component is provided on the test bench, located on one side of the working panel, with its test end in contact with both sides of the circuit breaker to be tested placed on the working panel. A mode switching component is installed on the outer frame and connected to the working panel. The temperature-measuring magnetic component includes a test cylinder placed on both sides of the circuit breaker to be tested and a rotating arm for adjusting the position of the test cylinder. In use, this invention achieves accurate detection, convenient operation, stable operation, and efficient fault diagnosis of the circuit breaker's overload and short-circuit protection mechanisms, comprehensively improving the reliability and efficiency of circuit breaker testing.

Description

Technical Field

[0001] This invention relates to the field of circuit breaker testing technology, and more specifically, to a comprehensive circuit breaker testing equipment and method. Background Technology

[0002] As a core device for ensuring the safety of power systems, circuit breakers play a crucial role in reliably disconnecting circuits when faults or overloads occur. This function relies on two independent yet coordinated protection mechanisms: overload protection utilizes the thermal deformation characteristics of bimetallic strips to delay disconnecting the circuit under continuous overcurrent conditions, preventing equipment damage due to prolonged overheating; short-circuit protection, on the other hand, relies on the instantaneous magnetic response of electromagnets to cut off the circuit in milliseconds when the current surges instantaneously, avoiding major risks such as arc ignition.

[0003] The existing detection system conducts tests by simulating actual working conditions: after the circuit breaker is connected to the detection circuit, the current parameters are precisely adjusted by the voltage regulator and the current booster to construct simulated overload or short circuit scenarios respectively; the current / voltage acquisition module monitors the circuit status in real time, while the main controller determines the effectiveness of the protection function based solely on the single result of "whether the circuit is open". In the overload simulation, the system determines that the overload protection is qualified if the circuit is disconnected, and in the short circuit simulation, the system determines that the short circuit protection is qualified if the circuit is disconnected.

[0004] The above judgment logic, which relies solely on "whether the power is off," has a critical flaw: it fails to distinguish the specific action mechanism. When testing for overload, if the current abnormally exceeds the set threshold and unexpectedly triggers the electromagnet, it will mask the potential for metal plate failure. When testing for short circuit, if the electromagnet itself is faulty, but the metal plate is deformed and broken due to heat caused by the continuous action of the large current, it will mask the risk of electromagnet failure. Such misjudgments will not only lead to defective products entering the market, but will also directly affect the accuracy of quality control and create hidden safety hazards in the operation of the power system.

[0005] Therefore, this application proposes a comprehensive testing equipment and method for circuit breakers to solve the above problems. Summary of the Invention

[0006] Technical problem to be solved: In view of the problems existing in the prior art, the purpose of this invention is to provide a comprehensive testing equipment and method for circuit breakers, which solves the problem of judging based solely on power outage results and failing to distinguish between overload and short circuit protection action mechanisms, leading to potential misjudgments.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a circuit breaker comprehensive testing equipment, comprising a test bench, a base plate and an outer frame mounted on the test bench surface, and a working plate rotatably mounted on the base plate for placing circuit breakers; a temperature-measuring magnetic component is provided on the test bench, the temperature-measuring magnetic component is located on one side of the working plate, and the test end of the temperature-measuring magnetic component is in contact with the two sides of the circuit breaker to be tested placed on the working plate; a mode switching component is installed on the outer frame, and the mode switching component is connected to the working plate; the temperature-measuring magnetic component includes: test cylinders placed on the two sides of the circuit breaker to be tested and a rotating arm for adjusting the position of the test cylinders, and a thermistor and a magnetoresistor are respectively installed in the two test cylinders, the thermistor senses overheating of the metal sheet inside the circuit breaker to be tested, and the magnetoresistor senses imbalance of the electromagnet inside the circuit breaker to be tested.

[0008] In a new embodiment, the test bench is provided with a pushing assembly for driving the displacement of the rotating arm. The pushing assembly includes a cylinder and a translation plate. The cylinder is installed on one side of the top of the test bench. The translation plate is fixedly installed at the telescopic end of the cylinder. Two fixed arms are symmetrically installed at the inward end of the translation plate, and the ends of the fixed arms are rotatably connected to one end of the rotating arm. A voltage comparator is installed at the top of the translation plate. The voltage comparator is connected to a thermistor and a magnetor via wires, respectively, and is configured to capture the voltage signals generated by the resistance changes of the two in real time. By comparing the order of signal triggering, the comparator prioritizes the signal that changes first, thus distinguishing between overload and short-circuit synchronous abnormal faults.

[0009] In a new embodiment, a status indicator light 1 is installed on the outward side of each of the two rotating arms, which is configured to trigger a primary alarm based on a sudden change in the resistance value of the thermistor or magnetoresistor; a status indicator light 2 is provided on the voltage comparator, which is configured to trigger a secondary alarm based on the voltage comparison result; when the two resistor signals are synchronously abnormal, the fault signal with the faster change in resistance value is responded to first.

[0010] In a new embodiment, the mode switching component includes: a boom, fixedly installed in the middle of the outer frame; an insulating platform, fixedly installed at the bottom of the boom, with its bottom rotatably mounted on the top of the work plate, and the insulating platform having a built-in independent power supply; a second cylinder, installed on the top of the insulating platform, and coaxial with the first cylinder; a long strip plate is installed at the telescopic end of the second cylinder, and a spring push rod slides on the end of the long strip plate, with a rack segment at the bottom of the spring push rod; an extension platform is installed on one side of the insulating platform, and a half-gear disk is rotatably installed on the extension platform, the half-gear disk meshing with the rack segment at the bottom of the spring push rod, and two spring contact heads are installed circumferentially at the bottom of the half-gear disk, the spring contact heads being configured to abut against the circuit input terminal of the circuit breaker under test.

[0011] In a new embodiment, the extension platform is arranged on the same side as the cylinder, and two symmetrically arranged mounting ports are opened on the extension platform, with the half gear disk rotatably mounted in one of the mounting ports.

[0012] In a new embodiment, the working plate is equipped with a clamping assembly for clamping the circuit breaker. The clamping assembly includes: a base plate, which is equidistantly and annularly mounted on the top of the working plate; parallel plates, which are symmetrically arranged on both sides of the top of the base plate; and torsion spring rods symmetrically arranged on the left and right sides of the inward end face of the parallel plates, with torsion spring contact blocks rotatably mounted at the rod heads of the torsion spring rods.

[0013] In a new embodiment, the head of each test cylinder is slidably fitted with an outer sleeve, and the outer sleeve is connected to the inner wall of the rotating arm via a return spring on its outward side; the inward end of the thermistor is provided with a thermally conductive silicone layer, and the inward end of the magnetoresistor is provided with a magnetically conductive layer.

[0014] In a new embodiment, a circuit output post is mounted on the base plate, and a spring pin is mounted on the circuit output post for elastically contacting the output terminal of the circuit breaker under test to draw out the test current.

[0015] In a new embodiment, a drive motor is installed on the bottom wall of the test bench. The output end of the drive motor passes through the test bench surface and the bottom wall of the base plate in sequence, and is fixedly connected to the bottom of the work plate, for driving the work plate to rotate to switch test positions.

[0016] A method for using a comprehensive circuit breaker testing device includes the following steps:

[0017] S1. The circuit breaker is fixed on the working plate by the clamping assembly. The drive motor drives the working plate to rotate, which in turn drives the circuit breaker into the test position. The input terminal of the circuit breaker to be tested contacts the spring contact head of the mode switching assembly and the output terminal contacts the spring pin of the circuit output post to form a test circuit.

[0018] S2. Start the push assembly to push the test cylinder to press against the two sides of the circuit breaker housing, so that the thermistor is aligned with the metal sheet and the magnetor is aligned with the electromagnet. The thermistor and magnetor monitor the foundation status in real time. In case of abnormality, the status indicator light of the rotating arm flashes to warn of the abnormality. Start the independent power supply of the insulation platform. The current is input to the circuit breaker through the overload test spring contact to perform the overload test.

[0019] S3. When the start-up mode switching component switches the test short-circuit spring contact, if the circuit breaker trips during the overload test, the mode switching component will simultaneously push the circuit breaker switch open when switching the test short-circuit spring contact. The current will then be input into the circuit breaker through the test short-circuit spring contact for short-circuit testing.

[0020] S4. The thermistor continuously monitors the temperature rise of the metal sheet. If its resistance changes abruptly, it indicates that the metal sheet is overheating. The magnetor continuously monitors the magnetic field of the electromagnet. If its resistance changes abruptly, it indicates that the electromagnet is unbalanced. When the signals of the two resistors are synchronously abnormal, the voltage comparator compares the voltage change rate of the two resistors in real time, prioritizes the fault signal with the faster resistance change, and triggers the corresponding status indicator light to flash, clearly indicating the primary cause of the problem.

[0021] S5. Finally, the push component moves the test cylinder away from the current circuit breaker under test, the mode switching component retracts, and the work panel then moves the next circuit breaker under test into the work station to realize continuous testing scenario.

[0022] Beneficial effects: Compared with the prior art, the advantages of this invention are:

[0023] 1. This application separates thermistors and magnetoresistors on both sides of the test cylinder, so that the overload protection characteristics of the metal sheet temperature rise and the short circuit protection characteristics of the electromagnet magnetic field imbalance can be independently acquired from the physical signal source. This completely abandons the traditional erroneous judgment logic based on whether the power is off, and solves the problem of electromagnet malfunctions masking metal sheet failures or metal sheet malfunctions masking electromagnet faults from the structural level.

[0024] 2. By using a rotating arm to position the test cylinder, the thermistor is in close contact with the metal plate area to monitor overload protection actions, and the magnetoresistor is precisely aligned with the electromagnet to monitor short-circuit protection actions. During overload testing, if an abnormal current triggers a false electromagnet action, the thermistor will show no temperature rise signal, thus exposing the potential failure risk of the metal plate. During short-circuit testing, if the electromagnet itself is faulty but the metal plate breaks due to heat caused by a large current, the magnetoresistor will show no magnetic field change signal, directly identifying the electromagnet failure problem. By directly monitoring the source of the action, the hidden danger of misjudgment is completely eliminated, ensuring that defective products are accurately intercepted, fundamentally improving the accuracy of quality control.

[0025] 3. Based on the independent acquisition of signals from the metal sheet and the electromagnet, the device uses a voltage comparator to compare the temperature rise signal of the thermistor with the magnetic field signal of the magnetor in real time. When overload and short circuit characteristic signals show abnormalities simultaneously, the device can prioritize the response to the faster-changing signal according to priority logic, accurately pinpointing the dominant fault type. Combined with the two-level alarm system constructed by status indicator one and status indicator two, the primary alarm provides real-time feedback on the abnormal signals captured by the sensors, while the secondary alarm clarifies the fault attribute (metal sheet failure or electromagnet failure), enabling clear differentiation of the fault cause and further improving the judgment accuracy in complex scenarios.

[0026] 4. By driving the long plate with a cylinder, and cooperating with the meshing transmission of the rack section and the half-gear disc, the spring contact head can be quickly switched from the overload test point to the short circuit test point, realizing the mechanical linkage conversion between the two test modes. This ensures that the short circuit test can be started immediately after the overload test is completed, avoiding process interruption and greatly improving the efficiency of full-item testing of a single circuit breaker. At the same time, the dual spring contact heads share the same physical interface, reducing the impact of contact resistance differences on test results and ensuring the stability of current input. Attached Figure Description

[0027] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0028] Figure 2 This is a three-dimensional structural schematic diagram of the present invention from another perspective.

[0029] Figure 3 This is a schematic diagram of the test platform structure of the present invention.

[0030] Figure 4 This is a front view of the test platform structure of the present invention.

[0031] Figure 5 For the present invention Figure 4 Enlarged view of the structure at point A in the middle.

[0032] Figure 6 This is a schematic diagram of the working disk structure of the present invention.

[0033] Figure 7 This is a schematic diagram of the clamping component structure of the present invention.

[0034] Figure 8 This is a schematic diagram of the mode switching component structure of the present invention.

[0035] Figure 9 This is a schematic diagram of the temperature measuring magnetic component structure of the present invention.

[0036] Figure 10 This is a schematic diagram of the pushing component structure of the present invention.

[0037] Figure 11 This is a schematic diagram of the internal structure of the test cylinder of the present invention.

[0038] The attached diagram is labeled as follows: 1. Test bench; 2. Base plate; 3. Outer frame; 4. Working plate;

[0039] 5. Temperature measuring magnetic assembly; 51. Test cylinder; 52. Rotating arm; 521. Status indicator light 1; 53. Thermistor; 54. Magnetoresistor; 55. Outer sleeve; 56. Return spring;

[0040] 6. Mode switching component; 61. Lifting rod; 62. Insulating platform; 63. Cylinder II; 64. Long strip plate; 65. Spring push rod; 66. Rack segment; 67. Extension platform; 671. Mounting port; 68. Half gear disc; 69. Spring contact head;

[0041] 7. Pushing assembly; 71. Cylinder 1; 72. Translation plate; 73. Fixed arm; 74. Voltage comparator; 741. Status indicator light 2;

[0042] 8. Clamping assembly; 81. Base plate; 82. Parallel plate; 83. Torsion spring rod; 84. Torsion spring contact block;

[0043] 9. Circuit output post; 91. Spring-loaded pin. Detailed Implementation

[0044] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0045] This application provides a comprehensive testing equipment and method for circuit breakers, which solves the problem of misjudging potential hazards by relying solely on power outage results and failing to distinguish between overload and short-circuit protection mechanisms. In use, it achieves accurate detection, convenient operation, stable operation, and efficient fault diagnosis of circuit breaker overload and short-circuit protection mechanisms, comprehensively improving the reliability and efficiency of circuit breaker testing.

[0046] The technical solutions in this application are intended to solve the above-mentioned technical problems, and the overall approach is as follows.

[0047] Example 1, please refer to Figures 1-11 This application provides a comprehensive circuit breaker testing device, including a test bench 1, a base plate 2 and an outer frame 3 mounted on the test bench 1, and a working plate 4 rotatably mounted on the base plate 2 for placing the circuit breaker. The test bench 1 is provided with a temperature measuring magnetic component 5, which is located on one side of the working plate 4, and the test end of the temperature measuring magnetic component 5 is in contact with the two sides of the circuit breaker to be tested placed on the working plate 4. A mode switching component 6 is installed on the outer frame 3 and is connected to the working plate 4. The temperature measuring magnetic component 5 includes a test cylinder 51 placed on the two sides of the circuit breaker to be tested and a rotating arm 52 for adjusting the position of the test cylinder 51. A thermistor 53 and a magnetoresistor 54 are respectively installed in the two test cylinders 51. The thermistor 53 senses overheating of the metal sheet inside the circuit breaker to be tested, and the magnetoresistor 54 senses imbalance of the electromagnet inside the circuit breaker to be tested.

[0048] Furthermore, a drive motor is installed on the bottom wall of the test bench 1. The output end of the drive motor passes through the test bench 1 and the bottom wall of the base plate 2 in sequence, and is fixedly connected to the bottom of the work plate 4, which is used to drive the work plate 4 to rotate to switch test positions.

[0049] In a preferred embodiment of this solution, the circuit breaker comprehensive testing equipment provided in this application, through a rotatable working panel 4 and a dual-station collaborative testing architecture, achieves accurate testing of the overload and short-circuit protection performance of the circuit breaker. Its working principle is as follows:

[0050] First, the operator places the circuit breaker on the work plate 4 and fixes it using the clamping assembly 8. Specifically, the circuit breaker is placed between four torsion spring rods 83, and the torsion spring contact block 84 at the head of the torsion spring rod 83 adaptively locks the circuit breaker housing. Then, the drive motor drives the work plate 4 to rotate, moving the circuit breaker fixed by the clamping assembly 8 to the test station. At this time, the circuit breaker input terminal contacts the spring contact head 69 of the mode switching assembly 6 and conducts, and the output terminal contacts the spring pin 91 of the circuit output post 9, forming a complete test circuit.

[0051] Second, the push assembly 7 starts the detection. Specifically, the cylinder 71 pushes the translation plate 72 to move horizontally. The fixed arm 73 on the translation plate 72 is equipped with a manually pre-adjusted rotating arm 52, so that the test cylinder 51 at the end of the rotating arm 52 contacts the two outer shells of the circuit breaker. The two test cylinders 51 are precisely aligned with the positions of the metal sheet and the electromagnet outside the circuit breaker. The thermistor 53 in one of the test cylinders 51 is in close contact with the metal sheet area of ​​the circuit breaker through the surface thermal conductive silicone layer, and conducts the temperature rise signal in real time. The magnetoresistor 54 in the other test cylinder 51 captures the electromagnetic field change signal of the electromagnet through the surface magnetic layer. If the resistance value changes abruptly, it will trigger the status indicator light 521 on the rotating arm 52 to flash as a warning.

[0052] Third, the independent power supply built into the insulating platform 62 is powered on, and the current is input to the circuit breaker through the spring contact 69 to start the overload test. After the overload test is completed, the mode switching component 6 is activated. Specifically, the cylinder 63 pushes the long plate 64 outward, which has two effects. On the one hand, the long plate 64 uses the rack section 66 at the bottom to drive the meshing half gear disk 68 to rotate. The rotation of the half gear disk 68 drives the spring contact 69 at the bottom of the overload test to the spring contact 69 for short circuit test. The current is input through the spring contact 69 for short circuit test to simulate a short circuit. On the other hand, if the circuit breaker trips during the overload test, the spring push rod 65 at the end of the long plate 64 will push the circuit breaker to reset, thereby ensuring the smooth operation of the short circuit detection.

[0053] It should be noted that when the circuit breaker trips during the overload test, cylinder 63 pushes the long plate 64 to move horizontally, causing the spring push rod 65 at its front end to move towards the tripped circuit breaker. Since it is necessary to push the tripped switch to reset, the spring push rod 65 will contact the switch and continuously squeeze until it retracts to its limit and can no longer retract within the long plate 64. This generates sufficient rigid thrust to reset the switch. After the reset is completed, cylinder 63 retracts a certain distance (the effect of this retraction will not affect the alignment of the spring contact head 69, which should be considered a micro-adjustment). This micro-adjustment makes the spring push rod 65 regain its elasticity and be in an elastic contact state with the circuit breaker switch, avoiding the impact problem caused by the circuit breaker switch continuing to trip during the short circuit test, preventing damage to the long plate 64 and the spring push rod 65, and also not obstructing the tripping of the circuit breaker switch in the short circuit detection state.

[0054] Fourth, during the test, thermistor 53 continuously transmits the temperature rise signal of the metal sheet reflecting the short circuit characteristics, and magnetoresistor 54 continuously transmits the magnetic field signal of the electromagnet reflecting the overload characteristics. Voltage comparator 74 compares the rate of change of the two signals in real time through hardware circuit. When the signal synchronization is abnormal, its priority circuit will respond to the faster changing signal first (such as the millisecond-level response of magnetoresistor 54 during short circuit), and trigger the status indicator 741 of the corresponding thermistor 53 or magnetoresistor 54 on the top of the translation board 72 to flash respectively, so as to achieve accurate fault determination.

[0055] Fifth, after the test is completed, cylinder 1 71 drives the translation plate 72 and the fixed arm 73 to reset, and the rotating arm 52 resets accordingly, and the two test cylinders 51 detach from the circuit breaker housing; cylinder 2 63 drives the long plate 64 to reset, and the two spring contact heads 69 reset to the overload test contact position with the half gear plate 68, preparing for the next circuit breaker test; the drive motor drives the working plate 4 to rotate, so that the tested circuit breaker detaches from the spring contact head 69 and the spring pin 91, and at the same time sends the next circuit breaker to be tested into the test position.

[0056] In summary, the core advantages of this device are: the spring contact head 69 adopts a double-contact circumferential mounting setting, so that the overload / short circuit current is input through the same physical interface, eliminating the test deviation caused by the difference in contact resistance; the thermally conductive silicone layer of the thermistor 53 and the magnetically conductive layer of the magnetoresistor 54 are directly connected to the signal source to realize physical direct measurement; the voltage comparator 74 performs secondary comparison, prioritizing the response to whether the metal sheet overheats or the electromagnet is unbalanced first, and then further determining the fault problem.

[0057] Please see Figures 9-11The test bench 1 is equipped with a pushing assembly 7 that drives the rotating arm 52 to move. The pushing assembly 7 includes a cylinder 71 and a translation plate 72. The cylinder 71 is installed on one side of the top of the test bench 1. The translation plate 72 is fixedly installed at the telescopic end of the cylinder 71. Two fixed arms 73 are symmetrically installed at the inward end of the translation plate 72. The ends of the fixed arms 73 are rotatably connected to one end of the rotating arm 52. A voltage comparator 74 is installed at the top of the translation plate 72. The voltage comparator 74 is connected to the thermistor 53 and the magnetoresistor 54 through wires respectively. It is configured to capture the voltage signal generated by the resistance change of the two in real time. By comparing the order of signal triggering, it prioritizes the response to the signal that changes first, and distinguishes between overload and short circuit synchronous abnormal faults.

[0058] In the preferred embodiment of this solution, a cylinder 71, a translation plate 72, a fixed arm 73, and a voltage comparator 74 are provided. The extension and retraction of the cylinder 71 drives the translation plate 72 to reciprocate horizontally. Two fixed arms 73 are mounted on the translation plate 72 and are rotatably mounted on the rotating arm 52. This connection method allows the rotating arm 52 to be manually adjusted in position while retaining a certain degree of rotational freedom, ensuring that the end test cylinder 51 can accurately fit against the circuit breaker housing. This allows the test cylinders 51 mounted on the two rotating arms 52 to be accurately aligned with the positions of the metal sheet and electromagnet outside the circuit breaker, facilitating induction detection.

[0059] Secondly, the voltage comparator 74 mounted on the top of the translation plate 72 is a key component for fault diagnosis. It is connected to the thermistor 53 and the magnetoresistor 54 via wires. During operation, the voltage comparator 74 captures the voltage signals generated by the resistance changes of the two sensors in real time. When the circuit breaker experiences an overload or short circuit, the thermistor 53 will change its resistance due to the temperature rise of the metal plate, and the magnetoresistor 54 will change its resistance due to the change in the magnetic field of the electromagnet. Both are converted into corresponding voltage signals and transmitted to the voltage comparator 74. The voltage comparator 74 analyzes the order in which the two signals are triggered, following the logic of prioritizing the response to the signal that changes first: if the magnetoresistor 54 signal changes abruptly first (corresponding to the rapid magnetic field change during a short circuit), it is preferentially determined to be a short circuit-related fault; if the thermistor 53 signal changes first (corresponding to the temperature rise process during an overload), it is preferentially determined to be an overload-related fault. In this way, the equipment can accurately distinguish the fault type when overload and short circuit are synchronously abnormal, providing a clear basis for the judgment of the test results.

[0060] Please see Figure 10 and Figure 11 Status indicator light 521 is installed on the outward side of each of the two rotating arms 52. It is configured to trigger a primary alarm based on the sudden change in the resistance of the thermistor 53 or the magnetoresistor 54. Status indicator light 741 is provided on the voltage comparator 74. It is configured to trigger a secondary alarm based on the voltage comparison result. When the two resistor signals are synchronously abnormal, the fault signal with the faster change in resistance will be responded to first.

[0061] In the preferred embodiment of this solution, status indicator light 1 521 and status indicator light 2 741 form a two-level alarm system: the primary alarm (status indicator light 1 521) is quickly triggered by a sudden change in the resistance of thermistor 53 or magnetoresistor 54 to achieve a preliminary warning of the fault; the secondary alarm (status indicator light 2 741) is triggered based on the signal analysis results of voltage comparator 74 to complete the accurate determination of the fault type. The two-level alarms work together to ensure the timeliness of fault response and improve the accuracy of fault identification.

[0062] Specifically, when the signals of thermistor 53 and magnetoresistor 54 are abnormally synchronized, voltage comparator 74 can quickly identify the dominant fault type under complex operating conditions by prioritizing the response to the signal with the faster resistance change, avoiding judgment delay caused by signal confusion. It is especially suitable for critical test scenarios where overload and short circuit characteristics occur simultaneously. Operators can intuitively judge the equipment operation status through the light status of status indicator 1 521 and status indicator 2 741. The flashing of status indicator 1 521 indicates that thermistor 53 or magnetoresistor 54 has captured an abnormal signal, and the flashing of status indicator 2 741 clarifies the fault attribute (related to overload or short circuit), reducing the complexity of manual interpretation and improving the operability and debugging efficiency of the test process.

[0063] Please see Figures 4-6 and Figure 8 The mode switching component 6 includes: a boom 61, fixedly installed in the middle of the outer frame 3; an insulating platform 62, fixedly installed at the bottom of the boom 61, and rotatably installed at the top of the working plate 4, and the insulating platform 62 has an independent power supply built in; a second cylinder 63, installed on the top of the insulating platform 62, and coaxial with the first cylinder 71; a long strip plate 64 is installed at the telescopic end of the second cylinder 63, and a spring push rod 65 slides at the end of the long strip plate 64, and a rack section 66 is provided at the bottom of the spring push rod 65; an extension platform 67 is installed on one side of the insulating platform 62, and a half gear disk 68 is rotatably installed on the extension platform 67. The half gear disk 68 meshes with the rack section 66 at the bottom of the spring push rod 65, and two spring contact heads 69 are installed circumferentially at the bottom of the half gear disk 68. The spring contact heads 69 are configured to abut against the circuit input terminal of the circuit breaker under test.

[0064] In the preferred embodiment of this solution, by setting up a lifting rod 61, an insulating platform 62, a second cylinder 63, a long strip plate 64, a spring push rod 65, a rack segment 66, an extension platform 67, a half-gear disk 68, and spring contact heads 69, the second cylinder 63 drives the long strip plate 64, which in turn drives the half-gear disk 68 to rotate via the rack segment 66 at the bottom of the long strip plate 64. This causes the two spring contact heads 69 at the bottom of the half-gear disk 68 to quickly switch positions, ensuring that there is no delay in switching between overload and short-circuit test modes and improving test efficiency.

[0065] Please see Figure 6 and Figure 8 The extension platform 67 is set on the same side as the cylinder 71. Two symmetrically arranged mounting ports 671 are opened on the extension platform 67. The half gear disk 68 is rotatably installed in one of the mounting ports 671.

[0066] In the preferred embodiment of this solution, the two symmetrical mounting ports 671 provide optional mounting positions for the half-gear disk 68. The mounting position of the half-gear disk 68 can be flexibly adjusted according to the differences in the model of the circuit breaker being tested (such as different input terminal spacing, or selection of different input terminals), so that the spring contact head 69 can connect to the input terminals of circuit breakers of different specifications within a certain range, thus broadening the applicability of the equipment.

[0067] Please see Figure 7 The working plate 4 is equipped with a clamping assembly 8 for clamping the circuit breaker. The clamping assembly 8 includes: a base plate 81, which is equidistantly and annularly installed on the top of the working plate 4; parallel plates 82, which are symmetrically arranged on the top two sides of the base plate 81; and torsion spring rods 83, which are symmetrically arranged and rotatably installed on the left and right sides of the inward end face of the parallel plates 82, and torsion spring contact blocks 84, which are rotatably installed at the rod heads of the torsion spring rods 83.

[0068] In a preferred embodiment of this solution, a base plate 81, a parallel plate 82, torsion spring rods 83, and torsion spring contact blocks 84 are provided. The parallel plate 82 is symmetrically arranged on both sides of the top of the base plate 81, and the torsion spring rods 83, which are rotatably mounted on it, are symmetrically distributed from left to right, forming a closed clamping grip on the circuit breaker housing. When the circuit breaker is placed, it presses against the four torsion spring rods 83, which provide a continuous elastic clamping force through their own torsion spring characteristics. When the circuit breaker is placed between two sets of torsion spring rods 83, the torsion spring contact blocks 84 will automatically adjust the contact angle according to the size of the circuit breaker housing. This can not only tightly fit circuit breakers of different specifications (such as differences in housing thickness), but also avoid damage to the housing caused by rigid clamping, ensuring clamping reliability while also having good compatibility.

[0069] Please see Figure 10 and Figure 11 The test cylinder 51 is slidably fitted with an outer sleeve 55 at its head. The outer sleeve 55 is connected to the inner wall of the rotating arm 52 via a return spring 56 on its outward side. The thermistor 53 has a thermally conductive silicone layer at its inward end, and the magnetoresistor 54 has a magnetically conductive layer at its inward end.

[0070] In a preferred embodiment of this solution, by setting an outer sleeve 55, a return spring 56, a thermally conductive silicone layer, and a magnetically conductive layer, the outer sleeve 55 is first connected to the inner wall of the rotating arm 52 through the return spring 56. When the test cylinder 51 touches the circuit breaker housing, the outer sleeve 55 can generate elastic buffer by compressing the return spring 56, so that the cylinder head of the outer sleeve 55 can adapt to the slight undulations or size deviations of the circuit breaker housing, ensuring that the thermistor 53 and the magnetoresistor 54 are in close contact with the detection area, avoiding local gaps caused by hard contact, and ensuring the continuity of signal transmission.

[0071] Secondly, the thermally conductive silicone layer of the thermistor 53 has excellent thermal conductivity and can be directly attached to the metal plate area of ​​the circuit breaker, minimizing the attenuation of the temperature rise signal during transmission and ensuring more sensitive capture of temperature changes in short-circuit characteristics; the magnetic permeable layer of the magnetor 54 can focus the magnetic field around the electromagnet, reduce environmental electromagnetic interference, and make the magnetic field change signal of overload characteristics clearer, thereby improving the detection accuracy of the magnetor 54 from the source.

[0072] Please see Figure 5 and Figure 6 A circuit output post 9 is installed on the base plate 2, and a spring pin 91 is installed on the circuit output post 9 for elastic contact with the output terminal of the circuit breaker under test to conduct test current.

[0073] In the preferred embodiment of this solution, by setting up a circuit output post 9 and a spring pin 91, the spring pin 91 forms a tight contact with the circuit breaker output terminal through its own elastic potential energy. The elastic extension range of the spring pin 91 can adapt to the output terminals of circuit breakers with different thicknesses or installation heights, eliminating the need to adjust the position of the circuit output post 9 for specific models. This enhances the equipment's compatibility with various specifications of circuit breakers, improves the flexibility of testing operations, and forms a corresponding cooperation with the clamping assembly 8 and the spring contact head 69 of the mode switching assembly 6 on the work panel 4, thus forming a complete test current loop. This shortens the current transmission path, reduces the impact of line loss on test accuracy, and also facilitates the overall assembly and maintenance of the equipment.

[0074] Example 2, please refer to Figures 1-11 This application also provides a method for using a comprehensive circuit breaker testing equipment, including the following steps:

[0075] S1. The circuit breaker is fixed on the working plate 4 by the clamping component 8. The drive motor drives the working plate 4 to rotate, which drives the circuit breaker into the test position, so that the input terminal of the circuit breaker to be tested abuts and conducts with the spring contact head 69 of the mode switching component 6, and the output terminal abuts and conducts with the spring pin 91 of the circuit output post 9, thus forming a test circuit.

[0076] S2. Start the push assembly 7 to push the test cylinder 51 to press the two sides of the circuit breaker housing, so that the thermistor 53 is aligned with the metal sheet and the magnetor 54 is aligned with the electromagnet. Thermistor 53 and magnetor 54 monitor the foundation status in real time. When there is an abnormality, the status indicator light 521 of the rotating arm 52 flashes to warn of the abnormality. Start the independent power supply of the insulating platform 62. The current is input to the circuit breaker through the overload test spring contact head 69 to perform the overload test.

[0077] S3. Start-up mode switching component 6 switches the test short-circuit spring contact 69. If the circuit breaker trips during the overload test, the mode switching component 6 switches the test short-circuit spring contact 69 and simultaneously pushes the circuit breaker switch to open. The current is then input into the circuit breaker through the test short-circuit spring contact 69 for short-circuit testing.

[0078] S4. Thermistor 53 continuously monitors the temperature rise of the metal sheet. If its resistance changes abruptly, it indicates that the metal sheet is overheating. Magnetor 54 continuously monitors the magnetic field of the electromagnet. If its resistance changes abruptly, it indicates that the electromagnet is unbalanced. When the signals of the two resistors are synchronously abnormal, voltage comparator 74 compares the voltage change rate of the two resistors in real time, prioritizes responding to the fault signal with faster resistance change, and triggers the corresponding status indicator 741 to flash, clearly indicating the initial cause of the problem.

[0079] S5. Finally, the push component 7 drives the test cylinder 51 to move away from the current circuit breaker under test, the mode switching component 6 retracts, and the work panel 4 then drives the next circuit breaker under test into the work station to realize the continuous testing scenario.

[0080] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A circuit breaker comprehensive testing equipment, comprising a test bench (1), a base plate (2) mounted on the surface of the test bench (1) and an outer frame (3), and a working panel (4) rotatably mounted on the base plate (2) for placing circuit breakers; characterized in that: The test bench (1) is provided with a temperature measuring magnetic component (5), which is located on one side of the work plate (4), and the test end of the temperature measuring magnetic component (5) is in contact with the two sides of the circuit breaker to be tested placed on the work plate (4). A mode switching component (6) is installed on the outer frame (3), and the mode switching component (6) is connected to the work panel (4); The temperature-measuring magnetic component (5) includes: The test cylinders (51) are placed on both sides of the circuit breaker under test and the rotating arm (52) is used to adjust the position of the test cylinders (51). Thermistors (53) and magnetoresistors (54) are installed in the two test cylinders (51) respectively. Thermistors (53) sense overheating of the metal sheet inside the circuit breaker under test, and magnetoresistors (54) sense imbalance of the electromagnet inside the circuit breaker under test.

2. The circuit breaker comprehensive testing equipment as described in claim 1, characterized in that, The test bench (1) is provided with a pushing assembly (7) for driving the displacement of the rotating arm (52). The pushing assembly (7) includes a cylinder (71) and a translation plate (72). The cylinder one (71) is installed on one side of the top of the test bench (1); The cylinder (71) has a translation plate (72) fixedly installed at its telescopic end. Two fixed arms (73) are symmetrically installed at the inward end of the translation plate (72). The ends of the fixed arms (73) are rotatably connected to one end of the rotating arm (52). A voltage comparator (74) is installed at the top of the translation plate (72); The voltage comparator (74) is connected to the thermistor (53) and the magnetor (54) respectively via wires. It is configured to capture the voltage signals generated by the resistance changes of the two in real time. By comparing the order of signal triggering, it prioritizes the response to the signal that changes first, and distinguishes between overload and short circuit synchronous abnormal faults.

3. The circuit breaker comprehensive testing equipment as described in claim 2, characterized in that, Both of the two rotating arms (52) are equipped with a status indicator light (521) on the outward side, which is configured to trigger a primary alarm based on a sudden change in the resistance of the thermistor (53) or the magnetoresistor (54). The voltage comparator (74) is equipped with a status indicator light (741), which is configured to trigger a secondary alarm based on the voltage comparison result; when the two resistor signals are synchronously abnormal, the fault signal with the faster resistance change is given priority.

4. The circuit breaker comprehensive testing equipment as described in claim 1, characterized in that, The mode switching component (6) includes: The hanger (61) is fixedly installed in the middle of the outer frame (3); An insulating platform (62) is fixedly installed at the bottom of the boom (61), and its bottom is rotatably installed on the top of the work plate (4). The insulating platform (62) has an independent power supply built in. Cylinder 2 (63) is mounted on top of the insulating platform (62) and is on the same axis as cylinder 1 (71); The telescopic end of the cylinder 2 (63) is equipped with a long strip plate (64), and a spring push rod (65) slides at the end of the long strip plate (64). The bottom of the spring push rod (65) is provided with a rack section (66). An extension platform (67) is installed on one side of the insulating platform (62). A half-gear disk (68) is rotatably mounted on the extension platform (67). The half-gear disk (68) meshes with the rack segment (66) at the bottom of the spring push rod (65). Two spring contacts (69) are installed circumferentially at the bottom of the half-gear disk (68). The spring contacts (69) are configured to abut against the circuit input terminal of the circuit breaker under test.

5. The circuit breaker comprehensive testing equipment as described in claim 4, characterized in that, The extension platform (67) is located on the same side as the cylinder (71). Two symmetrically arranged mounting ports (671) are opened on the extension platform (67). The half gear disk (68) is rotatably installed in one of the mounting ports (671).

6. The circuit breaker comprehensive testing equipment as described in claim 1, characterized in that, The working panel (4) is equipped with a clamping assembly (8) for clamping the circuit breaker, the clamping assembly (8) comprising: The base plate (81) is installed in an equidistant ring on the top of the working plate (4); Parallel plates (82) are symmetrically arranged on both sides of the top of the base plate (81); The parallel plate (82) has symmetrically arranged torsion spring rods (83) on both the left and right sides of its inward end face, and torsion spring contact blocks (84) are rotatably installed at the rod heads of the torsion spring rods (83).

7. The circuit breaker comprehensive testing equipment as described in claim 1, characterized in that, The test cylinder (51) is slidably fitted with an outer sleeve (55) at the cylinder head. The outer sleeve (55) is connected to the inner wall of the rotating arm (52) on the outward side through a return spring (56). The thermistor (53) has a thermally conductive silicone layer at one end, and the magnetoresistor (54) has a magnetically conductive layer at one end.

8. The circuit breaker comprehensive testing equipment as described in claim 1, characterized in that, The base plate (2) is equipped with a circuit output post (9), and a spring pin (91) is installed on the circuit output post (9) for elastic contact with the output terminal of the circuit breaker under test to draw out the test current.

9. The circuit breaker comprehensive testing equipment as described in claim 1, characterized in that, The test bench (1) has a drive motor installed on the bottom wall of the table surface. The output end of the drive motor passes through the table surface of the test bench (1) and the bottom wall of the base plate (2) in sequence, and is fixedly connected to the bottom of the work plate (4) to drive the work plate (4) to rotate to switch test positions.

10. A method of using a circuit breaker comprehensive testing equipment, comprising the circuit breaker comprehensive testing equipment as described in any one of claims 1-9, characterized in that, Includes the following steps: S1. The circuit breaker is fixed on the working plate (4) by the clamping component (8). The drive motor drives the working plate (4) to rotate, and the circuit breaker enters the test station. The input terminal of the circuit breaker to be tested contacts the spring contact head (69) of the mode switching component (6) and the output terminal contacts the spring pin (91) of the circuit output column (9) to form a test circuit. S2. Start the push assembly (7) to push the test cylinder (51) to press against the outer shells on both sides of the circuit breaker, so that the thermistor (53) is aligned with the metal sheet and the magnetoresistor (54) is aligned with the electromagnet. The thermistor (53) and the magnetoresistor (54) monitor the foundation status in real time. When there is an abnormality, the status indicator light (521) of the rotating arm (52) flashes to warn of the abnormality. Start the independent power supply of the insulating platform (62). The current is input to the circuit breaker through the overload test spring contact head (69) to perform the overload test. S3. Start the mode switching component (6) to switch the test short circuit spring contact (69). If the circuit breaker trips during the overload test, the mode switching component (6) will simultaneously push the circuit breaker switch open when switching the test short circuit spring contact (69). The current will then be input into the circuit breaker through the test short circuit spring contact (69) for short circuit testing. S4. Thermistor (53) continuously monitors the temperature rise of the metal sheet. If its resistance changes abruptly, it indicates that the metal sheet is overheated. Magnetor (54) continuously monitors the magnetic field of the electromagnet. If its resistance changes abruptly, it indicates that the electromagnet is unbalanced. When the two resistor signals are synchronously abnormal, voltage comparator (74) compares the voltage change rate of the two resistors in real time, prioritizes responding to the fault signal with faster resistance change, and triggers the corresponding status indicator light (741) to flash, clearly indicating the primary cause of the problem. S5. Finally, the push component (7) drives the test cylinder (51) to move away from the current circuit breaker under test, the mode switching component (6) retracts, and the work panel (4) drives the next circuit breaker under test to enter the work station to realize the continuous test scenario.

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