A mechanical wear detection assembly for a molded case circuit breaker

Abstract

This invention discloses a mechanical break-in testing component for molded case circuit breakers, relating to the field of circuit breaker break-in technology. It includes a break-in mounting component with a clamping contact for preventing electric shock; a lever positioning detection component; a break-in drive device; a toggle contact for indicating jamming; and a magnetic protection component. The break-in drive device can automatically control the toggle of the circuit breaker levers, enabling active break-in and assisting in testing for jamming during break-in. This addresses the problems of current mechanical break-in testing components for molded case circuit breakers being inconvenient for jamming detection during break-in and for automatically controlling the circuit breaker levers to prevent interference during overcurrent testing.

Description

Technical Field

[0001] This invention relates to the field of circuit breaker break-in technology, specifically to a mechanical break-in testing component for molded case circuit breakers. Background Technology

[0002] Molded case circuit breakers (MCCBs) are widely used in power generation projects and intelligent power distribution systems. The reliability of the circuit breaker directly affects the safety of the power distribution system. Circuit breaker break-in, also known as aging test, is a core process for improving contact reliability, stabilizing mechanical characteristics, and eliminating early faults. In actual break-in testing, in addition to actively moving the circuit breaker contacts, a controllable power supply is also used to perform overcurrent break-in tests. Current mechanical break-in testing components for MCCBs are not convenient for detecting jamming during break-in. Traditional spring-loaded moving tests make it difficult for operators to know the reset quality of the circuit breaker, and also make it difficult to test the closing stability of the circuit breaker. Furthermore, it is not convenient to prevent live operation before overcurrent testing, resulting in poor safety. It is also not convenient to automatically control the circuit breaker contacts to prevent interference during overcurrent testing. If the contacts are blocked, it can easily cause the circuit to fail to trip in time, affecting safety.

[0003] Therefore, this invention proposes a mechanical break-in testing component for molded case circuit breakers. Summary of the Invention

[0004] The purpose of this invention is to provide a mechanical break-in testing component for molded case circuit breakers, in order to solve the problems mentioned in the background art, such as the inconvenience of current mechanical break-in testing components for molded case circuit breakers in detecting jamming during break-in and the inconvenience of automatically controlling the circuit breaker levers to prevent interference during overcurrent testing.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a mechanical break-in testing component for a molded case circuit breaker, comprising a break-in mounting component, wherein a clamping contactor is mounted on the break-in mounting component for preventing electric shock; a lever positioning detection component is mounted on the break-in mounting component; a break-in driving device is mounted on the break-in mounting component for breaking in the circuit breaker; a toggle contactor is mounted on the break-in mounting component for indicating jamming; a magnetic protection component is mounted on the break-in driving device for preventing interference with the opening and closing of the circuit breaker; the break-in mounting component includes: a break-in mounting plate and a detection fixing block, wherein the detection fixing block is fixedly mounted on the break-in mounting plate; and two rows of through slots are provided on the break-in mounting plate.

[0006] Preferably, the break-in mounting component further includes: an AC power supply body, on which the AC power supply body is fixedly mounted.

[0007] Preferably, the clamping and connecting component includes: a counteracting lead screw, a clamping slider, a connecting plug, a load lamp, and a safety switch. The counteracting lead screw is rotatably mounted on the running-in mounting plate. A handwheel is provided at the end of the counteracting lead screw. Two clamping sliders are threadedly connected to the counteracting lead screw. Reverse threads are provided on both sides of the counteracting lead screw. The two clamping sliders are slidably mounted on the running-in mounting plate. Two connecting plugs are fixedly mounted on the two clamping sliders. The connecting plugs are used to insert the terminal pieces of the circuit breaker. The end of the connecting plug has a beveled structure. A load lamp is fixedly mounted on the front clamping slider. The load lamp is electrically connected to the two connecting plugs on the same side. The AC power supply body is electrically connected to the two connecting plugs on the same side. A safety switch is fixedly mounted on the two clamping sliders, and the two safety switches are used to press and fit against the circuit breaker housing.

[0008] Preferably, the lever positioning detection component includes: a fixed rod, a positioning lever, and a fixed contact piece. Two fixed rods are fixedly installed on the detection fixing block, and positioning levers are fixedly installed on the two fixed rods respectively. The positioning levers are arc-shaped spring pieces. Fixed contact pieces are fixedly installed on the two fixed rods respectively, and the two positioning levers are used to abut the fixed contact pieces respectively. The positioning levers are used to be squeezed by the circuit breaker lever.

[0009] Preferably, the break-in drive device includes: a movable slider and a tension spring frame, wherein the movable slider is slidably mounted on the break-in mounting plate; the tension spring frame is fixedly mounted on the top of the movable slider by bolts; and the movable slider is located between two clamping sliders.

[0010] Preferably, the break-in drive device further includes: an electric push rod and an end block, wherein the electric push rod is fixedly mounted on the movable slider; the end block is fixedly mounted on the output shaft of the electric push rod, and the end block is fixedly mounted on the break-in mounting plate by bolts; the electric push rod passes through the movable slider.

[0011] Preferably, the toggle contact component includes: a toggle flip plate, a tension spring, a toggle shaft, a bevel plate, an upper spring plate, and an upper contact plate. The toggle flip plate is rotatably mounted on the movable slider. A tension spring is fixedly mounted on the toggle flip plate, and the top of the tension spring is fixedly mounted on the inner side of the tension spring frame. The tail of the toggle flip plate is located below the tension spring frame. Two toggle shafts are fixedly mounted on the toggle flip plate, and bevel plates are fixedly mounted on each of the two toggle shafts. Upper spring plates are fixedly mounted on each of the two toggle shafts. Upper contact plates are fixedly mounted on each of the two toggle shafts. The two upper spring plates are located on both sides of the circuit breaker toggle. The two upper spring plates are used to elastically fit the two upper contact plates. The upper spring plates and upper contact plates on the same side, the positioning toggle plate and the fixed contact plate are electrically connected to the electric push rod and the switching power supply. The electric push rod is externally connected to a controller. The bevel plate is used to prevent jamming.

[0012] Preferably, the toggle connection further includes: a lower electromagnet, which is fixedly installed on the top of the toggle flip plate; the lower electromagnet AC power supply body is connected in series with a power switch.

[0013] Preferably, the magnetic protective component includes: an electromagnetic bracket, which is fixedly mounted on the movable slider; the electromagnetic bracket is located above the lower electromagnet.

[0014] Preferably, the magnetic protective component further includes: an upper electromagnet, which is fixedly mounted on an electromagnetic bracket; the upper electromagnet is aligned with the lower electromagnet; the upper electromagnet AC power supply body is connected in series with a power switch; and the toggle shaft is used as an anti-interference circuit breaker lever.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] This invention employs a clamping connection component in conjunction with a break-in mounting component, which facilitates overcurrent break-in of the circuit breaker. Utilizing the circuit breaker's own overcurrent protection, it controls the opening and closing of the circuit breaker, testing the normality of the circuit breaker's protection function while simultaneously performing the break-in process. Furthermore, this structure utilizes the method of installing safety switches on the inner sides of the two clamping sliders, which effectively improves the safety of the break-in test and avoids the risk of electric shock caused by personnel operating the circuit breaker while it is energized.

[0017] The lever positioning detection component can be used to test the closing stability of circuit breakers after break-in. This avoids issues caused by substandard assembly precision or difficulty in determining the fit accuracy of circuit breakers during maintenance. Simultaneously, in conjunction with the break-in drive device, it can automatically control the lever movement of the circuit breaker, enabling proactive break-in. It can also assist in testing for jamming during break-in, preventing safety hazards caused by poor lubrication or internal component jamming that makes resetting difficult. Furthermore, it facilitates the sorting of problematic circuit breakers by staff, avoiding the problem of traditional break-in testing methods that use spring-loaded levers that directly push the lever, even if jammed, into position.

[0018] The use of magnetic protection components can control the circuit breaker to be in a de-energized state when it is being operated for break-in, preventing the circuit breaker from jamming and causing arcing during break-in testing. In particular, when the circuit breaker is being tested for overcurrent, it ensures that the operating shaft does not interfere with the displacement of the circuit breaker's levers, thus guaranteeing safety during overcurrent break-in testing. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a circuit breaker installed on a mechanical break-in testing assembly for a molded case circuit breaker according to the present invention.

[0020] Figure 2This is a schematic diagram of the overall structure of a mechanical break-in testing component for a molded case circuit breaker according to the present invention;

[0021] Figure 3 For the present invention Figure 2 Enlarged view of the structure of region A in the middle;

[0022] Figure 4 This is a schematic diagram of the break-in installation component of the present invention;

[0023] Figure 5 This is a schematic diagram of the clamping connector structure of the present invention;

[0024] Figure 6 For the present invention Figure 4 Enlarged view of the structure of region B in the middle;

[0025] Figure 7 This is a schematic diagram of the break-in drive device of the present invention;

[0026] Figure 8 This is a schematic diagram of the bottom structure of the toggle contactor of the present invention;

[0027] Figure 9 For the present invention Figure 8 Enlarged view of the structure of region C in the middle;

[0028] Figure 10 This is a schematic diagram of the installation position of the tension spring of the present invention;

[0029] Figure 11 For the present invention Figure 1 Enlarged view of the structure of region D in the middle.

[0030] In the diagram: 1. Break-in mounting component; 101. Break-in mounting plate; 102. Detection fixing block; 103. AC power supply body; 2. Clamping connection component; 201. Opposing lead screw; 202. Clamping slider; 203. Connection plug; 204. Load lamp; 205. Safety switch; 3. Toggle lever positioning detection component; 301. Fixing rod; 302. Positioning lever; 303. Fixing connection piece; 4. Break-in drive device; 401. Moving slider; 402. Tension spring frame; 403. Electric push rod; 4031. End block; 5. Toggle connection component; 501. Toggle flip plate; 5011. Lower electromagnet; 5012. Tension spring; 502. Toggle shaft; 503. Inclined plate; 504. Upper spring; 505. Upper connection piece; 6. Magnetic protection component; 601. Electromagnetic bracket; 602. Upper electromagnet. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Example 1: Please refer to Figures 1 to 11 As shown:

[0033] This invention provides a technical solution: a mechanical break-in testing component for a molded case circuit breaker, comprising a break-in mounting component 1, a clamping contact component 2 mounted on the break-in mounting component 1 for preventing electric shock; a lever positioning detection component 3 mounted on the break-in mounting component 1; a break-in driving device 4 mounted on the break-in mounting component 1 for breaking in the circuit breaker; a toggle contact component 5 mounted on the break-in mounting component 1 for indicating jamming; a magnetic attraction protection component 6 mounted on the break-in driving device 4 for preventing interference with the opening and closing of the circuit breaker; the break-in mounting component 1 includes: a break-in mounting plate 101 and a detection fixing block 102, the detection fixing block 102 being fixedly mounted on the break-in mounting plate 101; the break-in mounting plate 101 has two rows of through slots.

[0034] The break-in mounting component 1 further includes: an AC power supply body 103, which is fixedly mounted on the break-in mounting plate 101; the clamping and connecting component 2 includes: a counter-rotating lead screw 201, a clamping slider 202, a connecting plug 203, a load lamp 204, and a safety switch 205, with the counter-rotating lead screw 201 rotatably mounted on the break-in mounting plate 101; a handwheel is provided at the end of the counter-rotating lead screw 201; two clamping sliders 202 are threadedly connected to the counter-rotating lead screw 201; the two counter-rotating lead screws 201... The side is provided with a reverse thread; two clamping sliders 202 are slidably mounted on the break-in mounting plate 101 respectively; two power connectors 203 are fixedly mounted on the two clamping sliders 202 respectively; the power connectors 203 are used to insert the terminal pieces of the circuit breaker; the ends of the power connectors 203 are beveled; a load lamp 204 is fixedly mounted on the front clamping slider 202; the load lamp 204 is electrically connected to the two power connectors 203 on the same side; the AC power supply body 103 is electrically connected to the two power connectors 203 on the same side. 03; Two safety switches 205 are fixedly installed on the two clamping sliders 202 respectively, and the two safety switches 205 are used to press and fit the circuit breaker housing; the use of clamping connection parts 2 in conjunction with the running-in mounting parts 1 can facilitate the overcurrent running-in of the circuit breaker. The circuit breaker's own overcurrent protection is used to control the opening and closing of the circuit breaker. While testing the normality of the circuit breaker's protection function, the running-in work is carried out. At the same time, the structure adopts the method of installing safety switches 205 on the inner side of the two clamping sliders 202 respectively, which can effectively improve the safety of the running-in test and avoid the risk of electric shock caused by the staff operating the circuit breaker with electricity. During the actual running-in operation, the circuit breaker needs to be placed on the running-in mounting plate 101. At this time, the opposing screw 201 can be rotated to drive the two clamping sliders 202 to move in opposite directions to clamp the circuit breaker. At this time, the four connection plugs 203 are inserted into the terminals of the circuit breaker respectively. As the two safety switches 205 press the two sides of the circuit breaker respectively, the connection plugs 203 can be energized normally.

[0035] The lever positioning detection component 3 includes: a fixed rod 301, a positioning lever 302, and a fixed contact piece 303. Two fixed rods 301 are fixedly installed on the detection fixing block 102, and positioning levers 302 are fixedly installed on each of the two fixed rods 301. The positioning levers 302 are arc-shaped spring pieces. Fixed contact pieces 303 are fixedly installed on each of the two fixed rods 301, and the two positioning levers 302 are used to abut against the fixed contact pieces 303. The positioning levers 302 are used to be squeezed by the circuit breaker lever. The break-in drive device 4 includes: a movable slider 401 and a tension spring frame 402. The sliding block 401 is slidably mounted on the break-in mounting plate 101; a tension spring bracket 402 is fixedly mounted on the top of the sliding block 401 by bolts; the sliding block 401 is located between two clamping blocks 202; the break-in drive device 4 also includes: an electric push rod 403 and an end block 4031, the electric push rod 403 is fixedly mounted on the sliding block 401; the end block 4031 is fixedly mounted on the output shaft of the electric push rod 403, and the end block 4031 is fixedly mounted on the break-in mounting plate 101 by bolts; the electric push rod 403 passes through the sliding block 401; the actuating contact 5 includes: an actuating flip plate 501 and a tension spring 50 12. A toggle shaft 502, a bevel plate 503, an upper spring plate 504, and an upper contact plate 505 are included. A toggle flip plate 501 is rotatably mounted on a movable slider 401. A tension spring 5012 is fixedly mounted on the toggle flip plate 501, with its top end fixedly mounted inside the tension spring frame 402. The tail of the toggle flip plate 501 is located below the tension spring frame 402. Two toggle shafts 502 are fixedly mounted on the toggle flip plate 501, and bevel plates 503 are fixedly mounted on each of the two toggle shafts 502. Upper spring plates 504 are fixedly mounted on each of the two toggle shafts 502. An upper connecting piece 505 is fixedly installed; two upper spring pieces 504 are located on both sides of the circuit breaker lever; the two upper spring pieces 504 are used to elastically fit the two upper connecting pieces 505 respectively; the upper spring pieces 504 and upper connecting pieces 505, the positioning lever 302 and the fixed connecting piece 303 on the same side are electrically connected to the switching power supply of the electric push rod 403 respectively, and can be controlled in parallel to realize that the switching power supply electrically connected to the electric push rod 403 can be turned on when any upper spring piece 504 and upper connecting piece 505 on the same side are fitted or when the positioning lever 302 and the fixed connecting piece 303 are fitted; the electric push rod 403 is externally connected to a controller;The inclined plate 503 is used to prevent jamming. The lever positioning detection piece 3 can be used to detect the closing stability of the circuit breaker after break-in. This avoids the problem of insufficient assembly accuracy or difficulty in obtaining the fitting accuracy during the break-in of the circuit breaker under maintenance. At the same time, in conjunction with the break-in drive device 4, it can realize automatic control of the circuit breaker lever to achieve active break-in work, which is more suitable for break-in work in the power-off state. In addition, the upper spring plate 504, upper contact plate 505, positioning lever 302 and fixed contact plate 303 are respectively connected to the power supply. The push rod 403 assists in testing the circuit breaker's break-in process by preventing jamming due to poor lubrication or internal parts sticking, which could lead to safety hazards. It also facilitates the sorting of problematic circuit breakers, as the consequences of a stuck circuit breaker are unimaginable. Furthermore, it avoids the traditional break-in method where the spring-loaded lever is directly pushed, causing even jammed circuit breakers to be moved into position. After the circuit breaker is clamped, the lever is positioned between the two fixed rods 3. Between 01 and 02, the switching power supply electrically connected to the electric push rod 403 is turned on simultaneously. The output shaft of the electric push rod 403 reciprocates, driving the movable slider 401 to move back and forth. This allows the circuit breaker lever to be moved via the two actuating shafts 502. Because after the circuit breaker is clamped, regardless of whether the circuit breaker is in the open or closed state, the circuit breaker lever will press the same-side positioning lever 302 to press the fixed contact piece 303. At this time, the electric push rod 403 can be used normally. At the same time, as the actuating shaft 502 moves and moves the circuit breaker lever, the upper spring piece 504 can also press the lever. The circuit breaker lever, when engaged with the upper contact piece 505, provides electrical connection without affecting the normal extension and retraction of the electric push rod 403 for opening and closing the circuit breaker. When the circuit breaker is closed, moving the lever will cause it to spring back directly, pressing against the upper spring piece 504 on the other side, which in turn presses against the upper contact piece 505, maintaining power. However, if the lever becomes stuck during its rebound, the upper spring piece 504 cannot be quickly pressed, and the electric push rod 403 will be de-energized, stopping the break-in and testing process and alerting the operator.

[0036] In Embodiment 2, based on Embodiment 1, the toggle contactor 5 further includes: a lower electromagnet 5011, which is fixedly mounted on the top of the toggle flip plate 501; the lower electromagnet 5011 AC power supply body 103 is connected in series with a power switch; the magnetic protection component 6 includes: an electromagnetic bracket 601, which is fixedly mounted on the movable slider 401; the electromagnetic bracket 601 is located above the lower electromagnet 5011; the magnetic protection component 6 further includes: an upper electromagnet 602, which is fixedly mounted on the electromagnetic bracket 601. The upper electromagnet 602 is aligned with the lower electromagnet 5011; the upper electromagnet 602 AC power supply body 103 is connected in series with the power switch; the toggle shaft 502 is used to prevent interference with the circuit breaker levers. The magnetic protection component 6 can control the circuit breaker to be in a de-energized state when the circuit breaker is toggleed for break-in, avoiding jamming and arcing during break-in testing. In particular, when the circuit breaker is tested for overcurrent, it ensures that the toggle shaft 502 does not interfere with the displacement of the circuit breaker levers, ensuring safety during overcurrent break-in testing. The series control is simple and avoids human error.

[0037] The working principle of this embodiment is as follows: First, during actual operation and break-in, the circuit breaker needs to be placed on the break-in mounting plate 101. At this time, the opposing lead screw 201 can be rotated to drive the two clamping sliders 202 to move in opposite directions to clamp the circuit breaker. At this time, the four power connectors 203 are respectively inserted into the terminals of the circuit breaker. As the two safety switches 205 press against both sides of the circuit breaker, the power connectors 203 can be energized normally, and the AC power supply body 103 can be operated normally to supply power. The current can be gradually increased until the circuit breaker is short-circuited, and then normal power supply is restored. When the circuit breaker automatically trips, its internal electrical connection structure can be broken in. After the circuit breaker is clamped, the circuit breaker lever is positioned between the two fixed levers 301. Simultaneously, the switching power supply electrically connected to the electric push rod 403 is turned on. The output shaft of the electric push rod 403 reciprocates, driving the movable slider 401 to move back and forth. This allows the circuit breaker lever to be actuated via the two actuating shafts 502. Because after the circuit breaker is clamped, regardless of whether it is in the open or closed state, the circuit breaker lever will press the same-side positioning lever 302 against the fixed electrical contact piece 303. At this time, the electric push rod 403 can be used normally. Simultaneously, as the toggle shaft 502 moves, it moves the circuit breaker lever. The upper spring plate 504 can then press the circuit breaker lever, engaging the upper contact plate 505 to achieve power connection. This does not affect the normal extension and retraction of the electric push rod 403 for opening and closing the circuit breaker. When the circuit breaker is closed, moving the circuit breaker lever will cause it to spring back directly, engaging the upper spring plate 504 on the other side to engage the upper contact plate 505, maintaining power. However, if the circuit breaker lever becomes stuck during springback, the upper spring plate 504 on the other side will... If the spring 504 cannot be squeezed, the electric push rod 403 will be in a de-energized state, stopping the break-in test. The staff can observe that the break-in has stopped and the circuit breaker can be further inspected. When the circuit breaker is in the closed state, if the stability of the circuit breaker's lever is not good and it is easy to be accidentally touched, the lever on the same side will be squeezed by the positioning lever 302, and the circuit breaker's lever will directly break the circuit and cannot maintain the closed state. This can help to release the pressure on the circuit breaker's lever at the same time during the break-in process, test the stability, and reduce the risk of the circuit breaker directly opening due to accidental touch or vibration.

[0038] When controlling the output current of the AC power supply body 103, the power supply needs to be turned on first. At this time, the lower electromagnet 5011 and the upper electromagnet 602 will be electromagnetically attracted, driving the toggle plate 501 to flip up, thereby controlling the toggle shaft 502 to lift up, no longer blocking the circuit breaker lever, ensuring that the lever is not blocked when the circuit breaker is undergoing overcurrent break-in.

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0040] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A mechanical wear detection assembly of a molded case circuit breaker, comprising a wear mounting (1) on which a clamping contact (2) is mounted, characterized in that: The clamping contact (2) is used to prevent electric shock; the running-in mounting part (1) is equipped with a lever positioning detection part (3); The break-in mounting component (1) is equipped with a break-in drive device (4); the break-in drive device (4) is used for breaking in the circuit breaker. The break-in mounting component (1) is equipped with a toggle contact component (5); the toggle contact component (5) is used to indicate jamming; the break-in drive device (4) is equipped with a magnetic protection component (6); the magnetic protection component (6) is used to prevent interference with the opening and closing of the circuit breaker; The break-in mounting component (1) includes: a break-in mounting plate (101), a detection fixing block (102), and an AC power supply body (103). The detection fixing block (102) and the AC power supply body (103) are fixedly mounted on the break-in mounting plate (101). The break-in mounting plate (101) is provided with two rows of through slots. The lever positioning detection component (3) includes: a fixing rod (301), a positioning lever (302), and a fixing contact plate (303). The break-in driving device (4) includes: a moving slider (401), a tension spring frame (402), an electric push rod (403), and an end block (4031). The toggle contact component (5) includes: a toggle flip plate (501), a tension spring (5012), a toggle shaft (502), an inclined plate (503), an upper spring plate (504), and an upper contact plate (505). The toggle flip plate (501) is rotatably mounted on the movable slider (401). A tension spring (5012) is fixedly mounted on the toggle flip plate (501), and the top end of the tension spring (5012) is fixedly mounted on the inner side of the tension spring frame (402). The tail of the toggle flip plate (501) is located below the tension spring frame (402). Two toggle shafts (502) are fixedly mounted on the toggle flip plate (501), and the two toggle shafts (502) are respectively fixedly mounted on the two toggle shafts (502). A bevel plate (503) is fixedly installed; upper spring plates (504) are fixedly installed on the two actuating shafts (502); upper connecting plates (505) are fixedly installed on the two actuating shafts (502); the two upper spring plates (504) are located on both sides of the circuit breaker lever; the two upper spring plates (504) are used to elastically fit the two upper connecting plates (505); the upper spring plates (504) and upper connecting plates (505) on the same side, the positioning lever (302) and the fixed connecting plate (303) are electrically connected to the switching power supply of the electric push rod (403); the electric push rod (403) is externally connected to a controller; the bevel plate (503) is used to prevent jamming; The toggle switch (5) further includes a lower electromagnet (5011), which is fixedly installed on the top of the toggle switch (501); the lower electromagnet (5011) is connected in series with the AC power supply body (103) to the power switch. The magnetic protective component (6) includes: an electromagnetic bracket (601), which is fixedly installed on the movable slider (401); the electromagnetic bracket (601) is located above the lower electromagnet (5011); The magnetic protective component (6) further includes: an upper electromagnet (602), which is fixedly mounted on an electromagnetic bracket (601); the upper electromagnet (602) is aligned with the lower electromagnet (5011); the upper electromagnet (602) is connected in series with the AC power supply body (103) in the power switch; and the toggle shaft (502) is used for the anti-interference circuit breaker toggle.

2. The mechanical wear detection assembly for a molded case circuit breaker of claim 1, wherein: The clamping and connecting component (2) includes: a counteracting lead screw (201), a clamping slider (202), a connecting plug (203), a load lamp (204), and a safety switch (205). The counteracting lead screw (201) is rotatably mounted on the running-in mounting plate (101). A handwheel is provided at the end of the counteracting lead screw (201). Two clamping sliders (202) are threadedly connected to the counteracting lead screw (201). Reverse threads are provided on both sides of the counteracting lead screw (201). The two clamping sliders (202) are slidably mounted on the running-in mounting plate (101). The two clamping sliders (202) are respectively fixed. Two power connectors (203) are fixedly installed; the power connectors (203) are used to insert the terminal pieces of the circuit breaker; the end of the power connectors (203) is a beveled structure; a load lamp (204) is fixedly installed on the front clamping slider (202); the load lamp (204) is electrically connected to the two power connectors (203) on the same side; the AC power supply body (103) is electrically connected to the two power connectors (203) on the same side; a safety switch (205) is fixedly installed on each of the two clamping sliders (202), and the two safety switches (205) are used to press and fit the circuit breaker housing.

3. The mechanical break-in testing assembly for a molded case circuit breaker according to claim 1, characterized in that: Two fixing rods (301) are fixedly installed on the detection fixing block (102), and positioning paddles (302) are fixedly installed on the two fixing rods (301), and the positioning paddles (302) are arc-shaped spring pieces; fixing contact pieces (303) are fixedly installed on the two fixing rods (301), and the two positioning paddles (302) are respectively used to fit the fixing contact pieces (303); the positioning paddles (302) are used to be squeezed by the circuit breaker paddles.

4. The mechanical wear out detection assembly of a molded case circuit breaker of claim 2, wherein: The movable slider (401) is slidably mounted on the break-in mounting plate (101); a tension spring bracket (402) is fixedly mounted on the top of the movable slider (401) by bolts; the movable slider (401) is located between two clamping sliders (202).

5. The mechanical wear out detection assembly of a molded case circuit breaker of claim 4, wherein: An electric push rod (403) is fixedly installed on the movable slider (401); an end block (4031) is fixedly installed on the output shaft of the electric push rod (403), and the end block (4031) is fixedly installed on the running-in mounting plate (101) by bolts; the electric push rod (403) passes through the movable slider (401).

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