Plug-in circuit breaker

Abstract

This utility model relates to the field of low-voltage electrical appliances, specifically to a plug-in circuit breaker. The electromagnetic system is located on one side of the operating element along the length of the circuit breaker pole. Most of the operating mechanism and the moving contact are located on one side of the electromagnetic system along the height of the circuit breaker pole. The portion of the stationary contact with a stationary contact point is located between the electromagnetic system and the moving contact along the height of the circuit breaker pole. That is, the portion of the stationary contact with the stationary contact point occupies the same space along the length of the circuit breaker pole as the electromagnetic system and the moving contact. Furthermore, the length direction of the electromagnetic system forms an angle with the movement direction of the operating element, making the layout of the circuit breaker poles compact and reasonable, reducing the external dimensions of the circuit breaker poles, especially their length. This facilitates the expansion of leakage protection functions by equipping a leakage current action module on one side of the width direction of the circuit breaker module and a leakage current detection module on the same side along the length direction of the circuit breaker module and the leakage current action module, without changing the original external dimensions.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical appliances, specifically to a plug-in circuit breaker. Background Technology

[0002] Insert-in circuit breakers are typically installed in 1U (44.5mm) high cabinets, so their height is generally fixed at around 38-42mm. The width of a single-pole circuit breaker varies from 14mm to 40mm depending on the rated current, and its length is usually around 110-114mm. Existing insert-in circuit breakers suffer from a non-compact layout, resulting in excessively large dimensions, especially in length, which hinders the expansion of other functional modules. For example, if leakage current protection is required, a leakage current detection module is usually installed at the rear end (length side) of the circuit breaker module, and a leakage current actuation module is installed on the width side. The leakage current detection module is connected to the first terminal of the circuit breaker module and the external terminal block via a conductive system, thus connecting to the main circuit. When leakage current is detected in the main circuit, the leakage current actuation module is triggered, causing the circuit breaker module to trip, thereby disconnecting the main circuit and achieving leakage current protection to ensure electrical safety. Such a plug-in circuit breaker with leakage protection would be much longer, requiring adjustments to the cabinet used to install the plug-in circuit breaker, making it incompatible with shared cabinets that do not have leakage protection for plug-in circuit breakers. Utility Model Content

[0003] The purpose of this utility model is to overcome at least one defect of the prior art and provide a plug-in circuit breaker.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A plug-in circuit breaker includes a circuit breaker module, a residual current device (RCD) operating module, and a residual current detection module. The circuit breaker module includes multiple circuit breaker poles arranged side by side along a third direction. The circuit breaker poles and the RCD operating module are arranged side by side along a third direction. The residual current detection module is arranged side by side with the circuit breaker poles and the RCD operating module in a first direction.

[0006] Each circuit breaker pole includes an operating element, a moving contact, a stationary contact, an operating mechanism driven between the operating element and the moving contact, a first terminal and a second terminal electrically connected to the moving contact and the stationary contact respectively, and an electromagnetic system for driving the operating mechanism to trip. The operating element is movably disposed at the second end of the circuit breaker pole. The electromagnetic system is located on one side of the operating element in a first direction, and the length direction of the electromagnetic system is set at an angle α with the first direction, where the angle α is 70° to 110°. One end of the operating mechanism driven to the moving contact and the moving contact are located on one side of the electromagnetic system in a second direction. The stationary contact of the stationary contact is located between the electromagnetic system and the moving contact in the second direction.

[0007] The first direction, the second direction, and the third direction are perpendicular to each other.

[0008] Optionally, the electromagnetic system is tilted toward the operating member, and the tilt angle between the length direction of the electromagnetic system and the second direction is 10° to 20°.

[0009] Optionally, the electromagnetic system includes a moving iron core, and the direction of movement of the moving iron core is parallel to the length direction of the electromagnetic system.

[0010] Optionally, each circuit breaker pole further includes a thermal system for driving the operating mechanism to trip, and an arc-extinguishing chamber; the thermal system includes a bimetallic strip electrically connected between the moving contact and the first terminal, and the electromagnetic system is located between the operating member and the arc-extinguishing chamber in a first direction; the bimetallic strip is at least partially located on the side of the moving contact away from the electromagnetic system in a second direction.

[0011] Optionally, the two opposite ends of the circuit breaker pole in the first direction are the first end and the second end, and the first terminal and the second terminal are spaced apart and opposite to each other in the second direction at the first end of the circuit breaker pole. The arc-extinguishing chamber is located between the electromagnetic system and the second terminal in the first direction. One end of the bimetallic strip in the first direction is located on the side of the moving contact away from the electromagnetic system in the second direction, and the other end of the bimetallic strip in the first direction is located on the side of the first terminal away from the second terminal in the second direction.

[0012] Optionally, the two opposite ends of the circuit breaker pole in the first direction are the first end and the second end. The second terminal is disposed at the first end of the circuit breaker pole, and the first terminal is disposed at the second end of the circuit breaker pole. The second terminal is located on one side of the operating member in the second direction and on one side of the end of the operating mechanism that is connected to the moving contact in the first direction. The arc-extinguishing chamber is located between the electromagnetic system and the second terminal in the first direction. One end of the bimetallic strip in the first direction is located on the side of the moving contact away from the electromagnetic system in the second direction, and the other end of the bimetallic strip in the first direction is located on one side of the arc-extinguishing chamber in the second direction.

[0013] Optionally, each circuit breaker pole may further include a magnetically conductive structure, which is located within the area enclosed by the bimetallic strip, the moving contact, the stationary contact, and the arc-extinguishing chamber. The magnetically conductive structure includes two magnetically conductive plates that are parallel and spaced apart along a third direction, and the first direction, the second direction, and the third direction are perpendicular to each other.

[0014] Optionally, the electromagnetic system is tilted toward the operating component, and the tilt angle between the length direction of the electromagnetic system and the second direction is 10° to 20°. The magnetic guiding structure and the arc-extinguishing chamber are tilted toward the electromagnetic system, and the tilt angle between the magnetic guiding structure and the arc-extinguishing chamber and the second direction is the same as the tilt angle between the length direction of the electromagnetic system and the second direction.

[0015] Optionally, the circuit breaker electrode has a dimension of 72-76mm in the first direction and a dimension of 38-42mm in the second direction; the leakage current action module has the same dimension as the circuit breaker electrode in the first direction and the same dimension in the second direction; the leakage current detection module has a dimension of 38mm in the first direction and the same dimension as the circuit breaker electrode in the second direction.

[0016] Optionally, the circuit breaker pole has a dimension of 74mm in the first direction, 40mm in the second direction, and 15mm in the third direction. The leakage current action module has the same dimensions as the circuit breaker pole in the first, second, and third directions. The leakage current detection module has a dimension of 38mm in the first direction, 40mm in the second direction, and 60mm in the third direction.

[0017] Optionally, the leakage current detection module includes a current transformer, a multi-pole first conductive system, and a multi-pole second conductive system. Each pole first conductive system includes a first conductive structure and a third terminal. The first conductive structure of each pole first conductive system passes through the current transformer, and its two ends are located on both sides of the current transformer. One end of the first conductive structure is a first connection end connected to the first terminal of the corresponding pole's circuit breaker pole, and the other end is connected to the third terminal. The first connection ends and third terminals of each pole first conductive system are spaced apart and arranged in a row. The distance between the center lines of the first connection ends of two adjacent poles' first conductive systems is smaller than the distance between the center lines of their third terminals.

[0018] Each pole's second conductive system includes a second conductive structure and a fourth terminal. One end of the second conductive structure is a second connection end that connects to the second terminal of the corresponding pole's circuit breaker pole, and the other end is connected to the fourth terminal. The second connection ends and fourth terminals of each pole's second conductive system are spaced apart and arranged in a row. The distance between the center lines of the second connection ends of two adjacent poles' second conductive systems is less than the distance between the center lines of their fourth terminals.

[0019] Optionally, the current transformer has a current transformer through hole, which is disposed through the current transformer along a first direction and is used for the first conductive structure to pass through; the second conductive system is located on the same side of the current transformer and the first conductive system in a second direction; the first connection terminal and the third terminal of each pole of the first conductive system are respectively located on both sides of the current transformer in the first direction, and the first connection terminal and the third terminal are spaced apart in the second direction; the first connection terminal and the third terminal of each pole of the first conductive system are spaced apart and arranged in a row along a third direction; the second connection terminal and the fourth terminal of each pole of the second conductive system are spaced apart and arranged in a row along a third direction.

[0020] Optionally, the leakage current action module includes a second housing, a circuit board, a test button, a trip unit, and a tripping component. The circuit board is assembled inside the second housing and has a test circuit. The second housing has a sliding hole, and the test button is slidably disposed in the sliding hole of the second housing. The trip unit is assembled inside the second housing and drives the tripping component. The tripping component is disposed inside the second housing and can move between a first position and a second position. The test circuit has a normally open contact and a normally closed contact. The test button is used to drive the normally open contact to connect and disconnect, and the tripping component is used to drive the normally closed contact to connect and disconnect.

[0021] When the test button is slid by an external force, the normally open contact is connected, thereby connecting the test circuit to trigger the trip unit to move from the first position to the second position, causing the trip unit to drive the circuit breaker to trip. At the same time, the trip unit also drives the normally closed contact to open.

[0022] In this plug-in circuit breaker, the electromagnetic system is located on one side of the operating member along the length of the circuit breaker pole. Most of the operating mechanism and the moving contact are located on one side of the electromagnetic system along the height of the circuit breaker pole. The portion of the stationary contact with a stationary contact point is located between the electromagnetic system and the moving contact along the height of the circuit breaker pole. That is, the portion of the stationary contact with a stationary contact point occupies the same space along the length of the circuit breaker pole as the electromagnetic system and the moving contact. Furthermore, the length of the electromagnetic system is angled to the direction of movement of the operating member, making the layout of the circuit breaker pole compact and reasonable, reducing the external dimensions of the circuit breaker pole, especially its length. This facilitates the expansion of leakage protection functions by equipping a leakage current operating module on one side of the circuit breaker module's width direction and a leakage current detection module on the same side of the length direction of the circuit breaker module and the leakage current operating module, without changing the original external dimensions.

[0023] In addition, the electromagnetic system is tilted to increase the number of components that can be arranged in the height direction.

[0024] In addition, the circuit breaker is suitable for use in communication cabinets, typically occupying a height of 1U. The length of the original circuit breaker poles has been shortened by 38mm, and the width has been reduced from 20mm to 15mm. By equipping a leakage current action module on one side of the width direction of the circuit breaker module and a leakage current detection module on one side of the length direction of the circuit breaker module and the leakage current action module, leakage current protection function can be achieved while maintaining the original plug-in circuit breaker's external dimensions.

[0025] In addition, the spacing between the poles of the two sets of conductive systems in the leakage current detection module is set to be smaller than the spacing between the poles of the other end connected to the external terminal block. The two ends of the conductive system are respectively applicable to the terminals of the circuit breaker pole and the external terminal block, which improves adaptability and versatility. Moreover, the conductive system of the leakage current detection module can be connected more reliably and stably between the terminals of the circuit breaker pole and the external terminal block.

[0026] In addition, the leakage current detection module at one end of the circuit breaker's length direction is compactly arranged, and the first connection end and the first wiring terminal are set to be not on the same horizontal plane, so as to occupy as much space as possible in the height direction of the circuit breaker, thereby compressing the space occupied by the leakage current detection module in the length direction of the circuit breaker, thereby reducing the length of the circuit breaker, which is conducive to adding leakage current protection function without changing the original external dimensions.

[0027] In addition, the leakage current action module has leakage fault tripping and leakage current testing functions. Two breakpoints are set in the test circuit: one is a normally open breakpoint driven by the test button, and the other is a normally closed breakpoint driven by the tripping component. While the tripping component drives the circuit breaker to trip, it disconnects the test circuit through the normally closed breakpoint, thereby avoiding the safety hazard of the test circuit being energized for a long time due to pressing the test button for a long time, and improving safety and reliability. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the circuit breaker according to the first embodiment of this utility model;

[0029] Figure 2 This is a schematic diagram of the circuit breaker poles of the first embodiment of the present invention with part of the housing removed;

[0030] Figure 3 This is a schematic diagram of the circuit breaker poles of the first embodiment of the present invention, with the shell and a magnetic plate removed.

[0031] Figure 4 This is a schematic diagram of the circuit breaker poles and leakage detection module of the first embodiment of the present invention with part of the housing removed;

[0032] Figure 5 This is a schematic diagram of the leakage current detection module of the first embodiment of this utility model without the housing;

[0033] Figure 6 This is a schematic diagram of the structure of the first conductive system according to the first embodiment of this utility model;

[0034] Figure 7 This is a schematic diagram of the structure of the second conductive system according to the first embodiment of this utility model;

[0035] Figure 8 This is a schematic diagram of the circuit breaker of the first embodiment of the present invention with one half-shell structure of the second shell removed;

[0036] Figure 9 This is a schematic diagram of the front of the leakage current action module when the normally closed break is closed in this utility model.

[0037] Figure 10 This is a schematic diagram of the back of the leakage current action module when the normally closed break is closed in this utility model;

[0038] Figure 11 This is a schematic diagram of the front of the leakage current action module when the normally closed break is opened.

[0039] Figure 12 This is a schematic diagram of the back of the leakage current action module when the normally closed break is opened.

[0040] Figure 13 This is a schematic diagram of the circuit breaker poles of the second embodiment of the present invention with part of the housing removed;

[0041] Figure 14 This is a schematic diagram of the circuit breaker poles and leakage detection module of the second embodiment of the present invention, with part of the housing removed.

[0042] Leakage detection module 100; current transformer 110; A-pole first conductive system 201; B-pole first conductive system 202; C-pole first conductive system 203; first conductive structure 210; first connection terminal 211; A-pole first connection section 2121; B-pole first connection section 2122; C-pole first connection section 2123; A-pole first bending section 2131; B-pole first bending section 2132; C-pole first bending section 2133; third terminal block 220; second conductive system 300; second conductive... Structure 310; Second connecting end 311; Second connecting section 312; Second bending section 313; Fourth terminal 320; Circuit breaker pole 400; First end 401; Second end 402; First housing 403; Operating component 410; Limiting hole 411; Operating mechanism 420; First connecting rod 421; Rotating component 422; Second connecting rod 423; Support component 424; Lock 425; Locking driven part 4251; Jumper 426; Moving contact 430; Stationary contact 440; Stationary contact 441; First terminal block 450; First terminal block 451; Third terminal block 452; Third flexible connection 453; Second terminal block 460; Second terminal block 461; Leakage current action module 500; Second housing 510; Sliding hole 511; Indicator hole 512; Fixed contact 513; Linkage hole 514; Linkage shaft 515; Interface 516; Circuit board 520; Test button 530; Tripping device 540; Tripping component 550; Locking part 551; Fitting part 552; Pushing part 553; First Rotating arm 554; second rotating arm 555; rotating connection part; indicator 560; limiting part 561; indicator part 562; elastic element 570; electromagnetic system 600; coil 610; magnetic yoke 620; moving iron core 630; thermal system 700; bimetallic strip 710; arc-quenching element 720; first segment of arc-quenching element 721; second segment of arc-quenching element 722; third segment of arc-quenching element 733; fourth segment of arc-quenching element 734; arc-extinguishing chamber 800; arc-extinguishing grid 810; magnetic conductive structure 900; magnetic conductive plate 910. Detailed Implementation

[0043] The following embodiments, in conjunction with the accompanying drawings, further illustrate specific implementations of the plug-in circuit breaker of this utility model. The plug-in circuit breaker of this utility model is not limited to the embodiments described below.

[0044] like Figure 1-4The diagram shows a first embodiment of a plug-in circuit breaker. This embodiment includes a circuit breaker module comprising multiple circuit breaker poles 400 arranged side-by-side. Each circuit breaker pole 400 includes a first housing 403 and a circuit breaker pole module assembled within the first housing 403. The circuit breaker pole module includes an operating member 410, a moving contact 430, a stationary contact 440, an operating mechanism 420 drivingly connected between the operating member 410 and the moving contact 430, a first terminal 450 and a second terminal 460 serving as the inlet and outlet terminals of the circuit breaker pole 400, and an arc-extinguishing chamber 800. The first terminal 450 and the second terminal 460 are electrically connected to the moving contact 430 and the stationary contact 440, respectively. The operating member 410 drives the moving contact 430 to contact and separate from the stationary contact 440 via the operating mechanism 420.

[0045] The plug-in circuit breaker also includes a protection device for driving the operating mechanism 420 to trip. The protection device includes a leakage current protection device, which includes a leakage current action module 500 and a leakage current detection module 100. The leakage current detection module 100 is connected to the main circuit of the circuit breaker and is used to detect the leakage current of the main circuit of the circuit breaker. When the leakage current detection module 100 detects the leakage current, it triggers the leakage current action module 500 to drive the operating mechanism 420 of the circuit breaker pole 400 to trip, so that the moving contact 430 separates from the stationary contact 440, thereby realizing leakage current protection.

[0046] The protection device also includes an electromagnetic system 600 for short-circuit protection and a thermal system 700 for overload protection respectively disposed in each circuit breaker pole 400. That is, the electromagnetic system 600 and the thermal system 700 are respectively part of the circuit breaker pole module. The thermal system 700 includes a bimetallic strip 710 electrically connected between the moving contact 430 and the first terminal 450.

[0047] Figure 1 In the circuit breaker, the first direction X is the length direction, the second direction Y is the height direction, and the third direction Z is the width direction (also known as the thickness direction). The first direction, the second direction, and the third direction are perpendicular to each other.

[0048] like Figure 1-2As shown, one improvement of this application is that the multiple circuit breaker poles 400 of the circuit breaker module are arranged side by side along a third direction, and the two opposite ends of the circuit breaker poles 400 in the first direction are the first end 401 and the second end 402. The leakage current action module 500 is arranged side by side on one side of the circuit breaker module perpendicular to the first end 401, and the leakage current detection module 100 is arranged at the first end 401 of the multiple circuit breaker poles 400 of the circuit breaker module and at the end of the leakage current action module 500 corresponding to the first end 401. In simple terms, the circuit breaker poles 400 and the leakage current action module 500 are arranged side by side along a third direction, and the leakage current detection module 100 is arranged side by side on one side of the circuit breaker poles 400 and the leakage current action module 500 in the first direction, that is, the leakage current detection module 100 is arranged side by side with the circuit breaker poles 400 and the leakage current action module 500 in the first direction.

[0049] The operating member 410 is movably disposed at the second end 402 of the circuit breaker pole 400. The electromagnetic system 600 is located on one side of the operating member 410 in the first direction. The length direction of the electromagnetic system 600 is set at an angle α with the first direction. The angle α is 70° to 110°, that is, the length direction of the electromagnetic system 600 is perpendicular to the first direction or inclined relative to the first and second directions. The end of the operating mechanism 420 that is tractively connected to the moving contact 430 and the moving contact 430 are located on the same side of the electromagnetic system 600 in the second direction. The stationary contact 441 of the stationary contact 440 is located between the electromagnetic system 600 and the moving contact 430 in the second direction.

[0050] In this embodiment of the plug-in circuit breaker, the electromagnetic system 600 is located on one side of the operating member 410 along the length of the circuit breaker pole 400. Most of the operating mechanism 420 and the moving contact 430 are located on one side of the electromagnetic system 600 along the height of the circuit breaker pole 400. The portion of the stationary contact 440 with the stationary contact point 441 is located between the electromagnetic system 600 and the moving contact 430 along the height of the circuit breaker pole 400. That is, the portion of the stationary contact 440 with the stationary contact point 441 occupies the space between the electromagnetic system 600 and the moving contact 430. The circuit breaker poles 400 are arranged in a space along the same length direction, and the length direction of the electromagnetic system 600 is set at an angle α with the movement direction of the operating member 410. This makes the layout of the circuit breaker poles 400 compact and reasonable, reducing the external dimensions of the circuit breaker poles 400, especially their length. This facilitates the expansion of leakage protection functions by equipping a leakage current action module 500 on one side of the width direction of the circuit breaker module and a leakage current detection module 100 on the same side of the length direction of the circuit breaker module and the leakage current action module 500, without changing the original external dimensions.

[0051] The operating mechanism 420 has multiple implementations, one preferred embodiment being, as follows: Figure 3As shown, the operating mechanism 420 includes a first connecting rod 421, a rotating member 422, a second connecting rod 423, a support member 424, a latch 425, a jumper 426, and a return spring. The rotating member 422 and the support member 424 are rotatably disposed within the first housing 403. The latch 425 and the jumper 426 are rotatably disposed on the support member 424, and the two are interlocked. One end of the return spring is connected to the support member 423, and the other end is connected to the first housing 403. The first connecting rod 421 connects the operating member 410 and the rotating member 422. The second connecting rod 423 connects the rotating member 422 and the jumper 426. Between 26, the moving contact 430 is mounted on the support 424. The latching buckle 425 and the jump buckle 426 are mutually limitingly connected, forming a multi-link structure between the first link 421, the rotating member 422, the second link 423, the support 424, the latching buckle 425, and the jump buckle 426. The operating member 410 is linearly movable along the first direction. The operating member 410 drives the moving contact 430 to contact and separate from the stationary contact 440 through the multi-link structure. The protection device pushes the latching buckle 425 to rotate to release the latching engagement of the latching buckle 425 and the jump buckle 426, which can disengage the operating mechanism 420. Of course, as another embodiment, the operating member 410 can also be rotatably configured.

[0052] Specifically, one end of the operating member 410 is provided with a limiting hole 411. One end of the first connecting rod 421 is limited and inserted into the limiting hole 411, and the other end is hinged to the rotating member 422. One end of the first connecting rod 421 can slide along the length direction of the limiting hole 411. The limiting hole 411 is preferably an oblong hole with its length direction along the sliding direction of the operating member 410. One end of the second connecting rod 423 is hinged to the rotating member 422, and the other end is hinged to the jump buckle 426. The rotation center of the rotating member 422, the hinge point between the rotating member 422 and the first connecting rod 421, and the hinge point between the rotating member 422 and the second connecting rod 423 are located at the three vertices of a triangle. In this embodiment, the rotating member 422 of the operating mechanism 420 is located between the operating member 410 and the electromagnetic system 600 in the first direction. The support member 424, the latch 425, and the jump buckle 426 of the operating mechanism 420 are located on one side of the rotating member 422 and the electromagnetic system 600 in the second direction.

[0053] Preferably, the latch 425 includes a latching driven part 4251. A bent portion is provided between the end of the moving contact 430 with a moving contact point and the rotation center of the moving contact 430. When the moving contact point of the moving contact 430 contacts the stationary contact 440, there is a gap between the bent portion of the moving contact and the moving iron core 630. The latching driven part 4251 extends between the bent portion of the moving contact and the moving iron core 630. The moving iron core 630 drives the latching driven part 4251 to trigger the operating mechanism 420 to disengage. The latch 425 is compactly arranged with the moving contact 430 and the moving iron core 630, saving space and facilitating the moving iron core 630 to drive the latching driven part 4251 to quickly disengage the operating mechanism 420.

[0054] Existing plug-in circuit breakers have a height of approximately 38-42 mm, a pole width ranging from 14 mm to 40 mm, and a length typically around 110-114 mm. The circuit breaker pole 400 using the technical solution of this application has a dimension (i.e., length) of 72-76 mm in the first direction, which is 38 mm or more shorter than conventional circuit breaker poles. It maintains the same height and width as existing plug-in circuit breaker poles, with a height of 38-42 mm and a width of 14 mm to 40 mm.

[0055] Preferably, in this embodiment, the width of the circuit breaker pole is reduced to three-quarters or four-fifths of that of an existing circuit breaker pole, that is, the minimum width of the circuit breaker pole is 15mm. Reducing the width to 15mm is achievable with existing technology in the field. For example, in a miniature circuit breaker with a U-shape, it is possible to make the width (thickness) of a single-pole circuit breaker 15mm or even smaller, although the thickness of a single-pole circuit breaker in a miniature circuit breaker is usually around 18mm.

[0056] like Figure 1As shown, the residual current device (RCD) module 500 and the circuit breaker pole 400 have the same dimensions (length) in the first direction, which is 72-76 mm. The RCD module 500 and the circuit breaker pole 400 have the same dimensions (height) in the second direction, which is 38-42 mm. To keep the total width of the circuit breaker the same as the original circuit breaker, the RCD module 500's dimension (width, also called thickness) in the third direction can be designed as the sum of the reductions in width of all the circuit breaker poles 400. Taking a two-pole circuit breaker as an example, the width of all the circuit breaker poles 400 is reduced by a total of 10 mm, and the width of the RCD module 500 is... For example, with a three-pole circuit breaker, the width of all circuit breaker poles 400 is shortened by 15mm, and the width of the leakage current action module 500 is 15mm. The dimension (i.e., length) of the leakage current detection module 100 in the first direction is 38mm, and the dimensions (i.e., height) of the leakage current detection module 100, the circuit breaker poles 400, and the leakage current action module 500 in the second direction are the same, which is 38-42mm. The dimension (i.e., width, also called thickness) of the leakage current detection module 100 in the third direction is the width of the leakage current action module 500 plus the width of the circuit breaker module (the sum of the widths of all circuit breaker poles 400).

[0057] The circuit breaker in this embodiment is suitable for use in communication cabinets and typically occupies a height of 1U. In this embodiment, the dimension (i.e., length) of the circuit breaker pole 400 in the first direction is 74mm, the dimension (i.e., height) in the second direction is 40mm, and the dimension (i.e., width, also known as thickness) in the third direction is 15mm. That is, the length of the original circuit breaker pole 400 is shortened by 38mm, and the width is reduced from 20mm to 15mm, which facilitates the addition of other functional modules in the length and width directions. Taking a three-pole circuit breaker as an example, the width of each of the three circuit breaker poles 400 of the circuit breaker module is shortened by 5mm, that is, the width of the circuit breaker module is shortened by a total of 15mm to accommodate a 15mm wide residual current device (RCD) module 500. In this embodiment, the dimensions of the RCD module 500 in the first, second, and third directions are the same as those of the circuit breaker poles 400. The width of each of the three circuit breaker poles 400 of the circuit breaker module is shortened by 38mm to accommodate a 38mm wide residual current detection module 100. Thus, by equipping the RCD module 500 on one side of the width direction of the circuit breaker module, the RCD module 100 in this embodiment has dimensions of 38mm in the first direction, 40mm in the second direction, and 60mm in the third direction. Equipping the RCD module 100 on one side of the length direction of the circuit breaker module and the RCD module 500 achieves residual current protection function while maintaining the original dimensions of the three-pole plug-in circuit breaker, making it compatible with existing cabinets and not increasing the width of the three-pole circuit breaker. It should be noted that this embodiment is illustrated using a three-pole circuit breaker, but it can obviously also be applied to a four-pole circuit breaker.

[0058] In other embodiments, the width of the circuit breaker poles can be maintained. For example, the width of the circuit breaker pole 400 can be 20mm, the total width of the three-pole circuit breaker plus the leakage current action module 500 can be 80mm, and the length of the leakage current detection module 100 can be 38mm, and the width can be 80mm. However, this increases the overall width of the original three-pole circuit breaker. This solution can also be used for circuit breakers with other pole numbers.

[0059] Furthermore, the electromagnetic system 600 includes a moving iron core 630. The direction of movement of the moving iron core 630 is parallel to the length direction of the electromagnetic system 600, that is, the direction of movement of the moving iron core 630 is also set at an angle α with the first direction. Preferably, the electromagnetic system 600 is inclined towards the operating member 410, i.e. Figure 3 As shown, the electromagnetic system 600 is tilted to the left, and the tilt angle between its length direction and the second direction is 10° to 20°, that is, the angle α between the length direction of the electromagnetic system 600 and the first direction is 70° to 80°. Preferably, the angle α is 70°. The tilted arrangement of the electromagnetic system 600 increases the number of components that can be arranged in the height direction.

[0060] The electromagnetic system 600 is located between the operating member 410 and the arc-extinguishing chamber 800 in a first direction; the bimetallic strip 710 is at least partially located on the side of the moving contact 430 away from the electromagnetic system 600 in a second direction. The arc-extinguishing chamber 800 is located on the side of the electromagnetic system 600 away from the operating member 410 in the length direction of the circuit breaker pole 400, and the bimetallic strip 710 is located on the side of the moving contact 430 away from the electromagnetic system 600 in the height direction of the circuit breaker pole 400, making the layout of the circuit breaker pole 400 compact and reasonable.

[0061] Furthermore, the plug-in circuit breaker in this embodiment adopts a rear-in, rear-out wiring method. The first terminal 450 and the second terminal 460 of the circuit breaker pole 400 in this embodiment are respectively used to electrically connect to the inlet and outlet terminals of the leakage current detection module 100. The inlet and outlet terminals of the leakage current detection module 100 serve as the inlet and outlet terminals of the plug-in circuit breaker, respectively. In this embodiment, the first terminal 450 and the second terminal 460 are arranged at intervals opposite to each other along the second direction at the first end 401 of the circuit breaker pole 400. The arc-extinguishing chamber 800 is located between the electromagnetic system 600 and the second terminal 460 in the first direction. One end of the bimetallic strip 710 in the first direction is located on the side of the moving contact 430 away from the electromagnetic system 600 in the second direction, and the other end of the bimetallic strip 710 in the first direction is located on the side of the first terminal 450 away from the second terminal 460 in the second direction.

[0062] Preferably, the arc-extinguishing chamber 800 is also inclined, and more preferably, the arc-extinguishing chamber 800 is inclined toward the electromagnetic system 600. Figure 3 As shown, the arc-extinguishing chamber 800 is tilted to the left, and the tilt angle between the arc-extinguishing chamber 800 and the second direction is the same as the tilt angle between the length direction of the electromagnetic system 600 and the second direction. The arc-extinguishing chamber 800 includes a plurality of parallel and spaced-apart arc-extinguishing grid plates 810. The arc-extinguishing grid plates 810 are arranged parallel to the length direction of the electromagnetic system 600, which facilitates a more compact arrangement of the arc-extinguishing chamber 800 and the electromagnetic system 600, and also allows for the arrangement of more arc-extinguishing grid plates 810 in the arc-extinguishing chamber 800, thereby improving the arc-extinguishing effect.

[0063] Furthermore, the circuit breaker pole module of this embodiment also includes a magnetically conductive structure 900. The magnetically conductive structure 900 is located within the area enclosed by the bimetallic strip 710, the moving contact 430, the stationary contact 440, and the arc-extinguishing chamber 800. Specifically, the magnetically conductive structure 900 is located in a first direction between the stationary contact 441 of the stationary contact 440 and the first terminal 450, and in a second direction on one side of the arc-extinguishing chamber 800. The magnetically conductive structure 900 includes two magnetically conductive plates 910 arranged parallel and spaced apart along a third direction, with the first, second, and third directions perpendicular to each other. Adding a magnetically conductive structure 900 within a limited space allows the arc generated between the moving contact 430 and the stationary contact 440 to be quickly transferred to the arc-extinguishing chamber 800 under the magnetic field of the magnetically conductive structure 900, achieving rapid arc extinguishing and improving the arc-extinguishing effect. The magnetically conductive structure 900 is also inclined; preferably, the magnetically conductive structure 900 is inclined towards the electromagnetic system 600. Figure 3 As shown, the magnetically conductive structure 900 is tilted to the left, and the tilt angle between the magnetically conductive structure 900 and the second direction is the same as the tilt angle between the length direction and the second direction of the electromagnetic system 600.

[0064] Preferably, the thermal system 700 further includes an arc-quenching component 720, which first bends from the bimetallic strip 710 toward the moving contact 430 at the break position, then passes through the space between the two magnetic plates 910 of the magnetic conductive structure 900, and then extends toward the arc-extinguishing chamber 800 on the side away from the electromagnetic system 600 in the first direction. Specifically, the arc-attracting component 720 includes a first arc-attracting segment 721, a second arc-attracting segment 722, a third arc-attracting segment 723, and a fourth arc-attracting segment 724 connected in sequence. The first arc-attracting segment 721 is connected to the bimetallic strip 710. The second arc-attracting segment 722 is located between the bimetallic strip 710 and the magnetically conductive structure 900 in the second direction. The second arc-attracting segment 722 is a bent structure formed by bending towards the moving contact 430 at the break position. The third arc-attracting segment 723 is located between the two magnetically conductive plates 910 of the magnetically conductive structure 900 and is positioned away from the stationary contact 440. The fourth arc-attracting segment 724 is arranged parallel to the side of the arc-extinguishing chamber 800 away from the electromagnetic system 600 in the first direction. By adding the arc-attracting component 720 within a limited space, the arc at the break position enters the arc-extinguishing chamber 800 after passing through the magnetically conductive structure 900, thus improving the arc-extinguishing effect.

[0065] The thermal system 700, as a type of protection device, is connected in series in the main circuit of the circuit breaker pole 400. Specifically, the bimetallic strip 710 of the thermal system 700 is electrically connected between the moving contact 430 and the first terminal 450. When an overload fault occurs in the main circuit, the bimetallic strip 710 is heated and bent, which drives the latch 425 to rotate, thereby releasing the latch 425 and the trip latch 426 from their latching engagement, causing the operating mechanism 420 to disengage and achieving overload protection. This is existing technology and will not be described in detail here. Specifically, the first terminal 450 is an elastic conductive clamp structure. The circuit breaker module also includes a first terminal block 451. The first terminal block 451 is electrically connected between the bimetallic strip 710 and the first terminal 450. That is, the moving contact 430, the bimetallic strip 710, the first terminal block 451 and the first terminal 450 are electrically connected in sequence. The first terminal block 451 is preferably a U-shaped structure. One side of the first terminal block 451 and the external conductor are clamped together in the first terminal 450, and the other side is electrically connected to the bimetallic strip 710 through a first flexible connection. The bimetallic strip 710 and the moving contact 430 are also electrically connected through a second flexible connection.

[0066] The electromagnetic system 600 has multiple implementations. A preferred embodiment includes a magnetic yoke 620, a coil frame, a coil 610, a moving iron core spring, a moving iron core 630 disposed within the coil frame, and a stationary iron core. The magnetic yoke 620 has a U-shaped structure and is fixedly assembled within the first housing 403. The magnetic yoke 620 has slots on both sides. The two ends of the coil frame are respectively inserted into the slots on both sides of the magnetic yoke 620. The coil 610 is wound around the outer side of the coil frame located in the middle of the magnetic yoke 620. 610 is connected in series in the main circuit of the circuit breaker pole 400; the electromagnetic system 600 is one of the protection devices. When a short circuit fault occurs in the main circuit, the moving iron core 630 moves towards the stationary iron core under the electromagnetic force of the coil 610. The moving iron core 630 drives the trip latch 426 to rotate to release the latching engagement of the latch 425 and the trip latch 426, so that the operating mechanism 420 is disengaged, thus realizing short circuit protection; after the short circuit fault is cleared, the moving iron core 630 moves away from the stationary iron core under the drive of the moving iron core spring, thus completing the reset. Specifically, the second terminal 460 is an elastic conductive clamp structure. The circuit breaker module also includes a second terminal block 461. The second terminal block 461 is electrically connected between the coil 610 of the electromagnetic system 600 and the second terminal block 460. That is, the stationary contact 440, the coil 610, the second terminal block 461, and the second terminal block 460 are electrically connected in sequence. The second terminal block 461 includes a first section and a second section. The first section of the second terminal block is preferably a U-shaped structure, and the second section is preferably an L-shaped structure. One side of the first section of the second terminal block and the external conductor are clamped together in the second terminal block 460. The other side of the first section of the second terminal block is connected to one end of the second section of the second terminal block, parallel to the first direction and located on the side of the arc-extinguishing chamber 800 away from the magnetically conductive structure 900 in the second direction. The other end of the second section of the second terminal block is connected to one end of the coil 610 and is located between the arc-extinguishing chamber 800 and the electromagnetic system 600 in the first direction. The other end of the coil 610 is connected to the stationary contact 440.

[0067] Optionally, the distance d1 between the center of the coil 610 of the electromagnetic system 600 and the center of the stationary contact 441 is less than 7 mm.

[0068] Optionally, the portion of the stationary contact 440 with the stationary contact point 441 is stacked on the side of the magnetic yoke 620 of the electromagnetic system 600 facing the moving contact 430, and the distance d2 between this side of the magnetic yoke 620 of the electromagnetic system 600 and the surface of the stationary contact point 441 for contacting the moving contact 430 is ≤4mm.

[0069] Another improvement of this application is that, Figure 4-7As shown, the leakage current detection module 100 of this embodiment includes a third housing and a leakage current detection component assembled in the third housing. The first housing 403 of the circuit breaker pole 400 is connected and fixed to the third housing by screws, rivets, or snap-fit. The leakage current detection component includes a current transformer 110, a multi-pole first conductive system, and a multi-pole second conductive system 300. The first conductive system and the second conductive system 300 serve as the inlet and outlet terminals of the leakage current detection module 100, respectively. Each pole of the first conductive system includes a first conductive structure 210 and a third terminal 220. The first conductive structure 210 of each pole of the first conductive system passes through the current transformer 110, and its two ends are located on both sides of the current transformer 110. One end of the first conductive structure 210 is a first connection end 211 connected to the first terminal 450 of the corresponding pole of the circuit breaker pole 400, and the other end is connected to the third terminal 220. The first connection end 211 and the third terminal 220 of each pole of the first conductive system are connected to each other. The first conductive systems of each pole are arranged at intervals and in rows, with the center line spacing between the first connection terminals 211 of adjacent poles being less than the center line spacing between their third terminals 220. Each pole's second conductive system 300 includes a second conductive structure 310 and a fourth terminal 320. One end of the second conductive structure 310 is a second connection terminal 311 connected to the second terminal 460 of the corresponding pole's circuit breaker pole 400, and the other end is connected to the fourth terminal 320. The second connection terminals 311 and fourth terminals 320 of each pole's second conductive system 300 are arranged at intervals and in rows, with the center line spacing between the second connection terminals 311 of adjacent poles being less than the center line spacing between their fourth terminals 320. In this embodiment, the pole spacing of the first end of the circuit breaker module is 15mm, that is, the spacing between the first terminals 450 of two adjacent circuit breaker poles 400 is 15mm, and the spacing between the second terminals 460 of two adjacent circuit breaker poles 400 is 15mm, while the pole spacing of the external terminal blocks in the cabinet is 20mm.

[0070] In this embodiment of the leakage current detection module and plug-in circuit breaker, the spacing between the poles of the two sets of conductive systems in the leakage current detection module 100 connected to the terminals of the circuit breaker pole 400 is set to be smaller than the spacing between the poles of the other end connected to the external terminal block. Both ends of the conductive systems are compatible with the terminals of the circuit breaker pole 400 and the external terminal block, improving adaptability and versatility. Furthermore, the conductive systems of the leakage current detection module can be reliably and stably connected between the terminals of the circuit breaker pole 400 and the external terminal block. In this embodiment, the center line spacing of the first connection terminals 211 of adjacent first conductive systems is 15mm, and the center line spacing of the third terminals 220 of adjacent first conductive systems is 20mm; the center line spacing of the second connection terminals 311 of adjacent second conductive systems 300 is 15mm, and the center line spacing of the fourth terminals 320 of adjacent second conductive systems 300 is 20mm.

[0071] The first housing 403 has a first wiring hole and a second wiring hole at its first end 401, which are respectively opposite to the first terminal 450 and the second terminal 460. The third housing has a first connection hole and a second connection hole on the side connected to the first housing 403, which are respectively opposite to the first connection end 211 and the second connection end 311. One end of the first connection end 211 passes through the first connection hole and the first wiring hole in sequence and is connected to the first terminal 450. One end of the second connection end 311 passes through the second connection hole and the second wiring hole in sequence and is connected to the second terminal 460. The third housing has a third wiring hole and a fourth wiring hole on the other side away from the first housing 403, which are respectively opposite to the third terminal 220 and the fourth terminal 320 and are used for external wires to pass through.

[0072] In this embodiment, as Figure 5-7 As shown, the current transformer 110 has a current transformer through hole, which is disposed through the current transformer 110 along a first direction and is used for the first conductive structure 210 to pass through; the second conductive system 300 is located on the same side of the current transformer 110 and the first conductive system in a second direction; the first connection terminal 211 and the third terminal 220 of each pole of the first conductive system are respectively located on both sides of the current transformer 110 in the first direction, and the first connection terminal 211 and the third terminal 220 are spaced apart in the second direction, that is, the first connection terminal 211 and the third terminal 220 are not on the same horizontal plane, and the first connection terminal 211 and the third terminal 220 of each pole of the first conductive system are spaced apart and arranged in a row along a third direction; the second connection terminal 311 and the fourth terminal 320 of each pole of the second conductive system 300 are spaced apart and arranged in a row along a third direction. The leakage current detection module 100 at one end of the circuit breaker's length direction is compactly arranged, and the first connection terminal 211 and the third terminal 220 are set to be not on the same horizontal plane, so as to occupy as much space as possible in the height direction of the circuit breaker, thereby compressing the space occupied by the leakage current detection module 100 in the length direction of the circuit breaker, thereby reducing the length of the circuit breaker, which is conducive to adding leakage current protection function without changing the original external dimensions.

[0073] Furthermore, such as Figure 5-6 As shown, the first connecting end 211 is a conductive plate structure, with its length direction along the first direction and its width direction along the third direction. The first conductive structure 210 also includes a first connecting segment and a first bent segment connected together. The first connecting segment is a conductive plate structure bent and connected to the first connecting end 211, and the first bent segment is a bent structure connected to the third terminal 220. The structural design of the first conductive structure 210 aims to occupy as much space as possible in the height and width directions of the circuit breaker, thereby compressing the space occupied in the length direction of the circuit breaker.

[0074] like Figure 6 As shown, the multi-pole first conductive system is a three-pole conductive system, namely, the A-pole first conductive system 201, the B-pole first conductive system 202, and the C-pole first conductive system 203. The first connection terminal 211 and the third terminal 220 of the A-pole first conductive system 201, the B-pole first conductive system 202, and the C-pole first conductive system 203 are respectively arranged at intervals along the third direction. The first conductive structure 210 of the A-pole first conductive system 201, the B-pole first conductive system 202, and the C-pole first conductive system 203 respectively includes a first connecting section and a first bending section. The first connecting section includes the A-pole first connecting section 2121, the B-pole first connecting section 2122, and the C-pole first connecting section 2123. The first bending section includes the A-pole first bending section 2131, the B-pole first bending section 2132, and the C-pole first bending section 2133.

[0075] The first connecting segment 2121 of pole A and the first connecting segment 2123 of pole C are located on opposite sides of the current transformer 110 in the third direction. The length of the first connecting segment 2121 of pole A and the first connecting segment 2123 of pole C are along the second direction, and their width is along the first direction. In simpler terms, the first connecting segment 2121 of pole A is perpendicularly connected to the first connecting terminal 211 of the first conductive system 201 of pole A, and the first connecting segment 2123 of pole C is perpendicularly connected to the first connecting terminal 211 of the first conductive system 203 of pole C. 1. The opposite sides are vertically connected; the first bending section 2131 of pole A and the first bending section 2133 of pole C are U-shaped bending structures with their openings facing the third direction in opposite directions. The bottom edge is located inside the transformer through hole, and the two sides are located on both sides of the transformer 110 in the first direction. The first bending section 2131 of pole A and the first bending section 2133 of pole C are preferably soft wire structures, which are easy to be bent into U-shape or other bending shapes and compactly arranged with the transformer 110. They are also easy to pass through the transformer through hole. Of course, they can also be conductive plate structures.

[0076] The first connecting segment 2122 of the B pole is located inside the through hole of the transformer, and its length direction is along the third direction and its width direction is along the first direction. The first bending segment 2132 of the B pole is an L-shaped bending structure. One end connected to the first connecting segment 2122 of the B pole has its length direction along the third direction and its width direction along the third direction, while the other end has its length direction along the first direction and its width direction along the third direction. In simple terms, the two ends of the first bending segment 2132 of the B pole are connected perpendicularly to each other. The first connecting segment 2122 of the B pole is coplanar and perpendicularly connected to the first connecting end 211 of the first conductive system 202 of the B pole, and is perpendicularly connected to one end of the first bending segment 2132 of the B pole to each other.

[0077] In this embodiment, the third terminal 220 of the first conductive system 201 (A pole), the first conductive system 202 (B pole), and the first conductive system 203 (C pole) have the same structure, which is an elastic conductive clip structure, making it easy to directly connect to the external conductor bar.

[0078] like Figure 7 As shown, the multi-pole second conductive system 300 is a three-pole conductive system, namely the A-pole second conductive system, the B-pole second conductive system and the C-pole second conductive system. The structures of each pole second conductive system 300 are the same. The second conductive structure 310 of the second conductive system 300 also includes a second connecting section 312 located between the second connecting end 311 and the fourth terminal 320. The second connecting section 312 is a conductive plate structure, which is arranged on the same plane as the second connecting end 311 and connected at an angle.

[0079] Furthermore, the second conductive structure 310 also includes a second bent section 313. The second bent section 313 is a conductive plate structure with its two ends arranged at an included angle. One end of the second bent section 313 is bent and connected to the second connecting section 312, and the other end of the second bent section 313, facing the current transformer 110, is connected to the fourth terminal 320. The length direction of the end of the second bent section 313 connected to the fourth terminal 320 is arranged along the first direction, and the width direction is arranged along the third direction. In this embodiment, the fourth terminal 320 is an elastic conductive clip structure, which facilitates direct insertion with external conductor bars.

[0080] like Figure 4 As shown, one end of the first terminal block 451 (i.e., one side of the first terminal block 451) and the first connecting end 211 are jointly clamped within the first terminal block 450, and one end of the second terminal block 461 (i.e., one side of the first segment of the second terminal block) and the second connecting end 311 are jointly clamped within the second terminal block 460. The leakage current detection module 100 and each circuit breaker pole 400 of the circuit breaker module are electrically connected via elastic conductive clips, facilitating rapid assembly of the leakage current detection module 100 and the circuit breaker module, and ensuring reliable and stable electrical connection.

[0081] like Figure 8-12As shown, the leakage current action module 500 of this embodiment includes a second housing 510 and a leakage current action component assembled within the second housing 510. The second housing 510 of the leakage current action module 500 is connected and fixed to the third housing of the leakage current detection module 100 by screws, rivets, or snap-fits. The leakage current action component includes a circuit board 520, a test button 530, a trip unit 540, and a tripping element 550. The circuit board 520 is assembled within the second housing 510, and a portion of the test circuit can be provided on the circuit board 520. At least one pole of the inlet and outlet terminals of the leakage current detection module 100 is electrically connected to the circuit board 520 of the leakage current detection module 100 to supply power to the circuit board 520 and the trip unit 540. The signal output terminal of the leakage current detection module 100 is electrically connected to the signal input terminal of the circuit board 520 to transmit the detection signal to the circuit board 520. The second housing 510 of the leakage current action module 500 has an interface 516 on the side facing the leakage current detection module 100. The second housing 510 is provided with a sliding hole 511. The test button 530 is slidably disposed in the sliding hole 511 of the second housing 510. The trip unit 540 is assembled in the second housing 510 and drives and cooperates with the tripping member 550. The tripping member 550 is disposed in the second housing 510 and can move between a first position and a second position.

[0082] It should be noted that the trip unit 540 and circuit board 520 are existing technologies. The trip unit 540 typically includes a coil frame, a coil wound on the outside of the coil frame, a moving iron core spring, a moving iron core and a stationary iron core disposed inside the coil frame. When the leakage current detection module 100 detects leakage current, it triggers the leakage current action module 500, that is, it sends a trip signal to the circuit board 520. The circuit board 520 controls the coil of the trip unit 540 to be energized, causing the moving iron core of the trip unit 540 to move towards the stationary iron core. The moving iron core drives the circuit breaker to trip and open through the tripping component 550, realizing leakage protection. After the leakage fault is cleared or the test circuit is disconnected, the circuit board 520 controls the coil of the trip unit 540 to be de-energized, and the moving iron core spring drives the moving iron core to move away from the stationary iron core to complete the reset. This will not be described in detail here.

[0083] Another improvement of this application is that the test circuit is provided with normally open and normally closed contacts. The test button 530 is used to drive the normally open contact to connect and disconnect, and the tripping member 550 is used to drive the normally closed contact to connect and disconnect. In the initial state, the test button 530 is not subjected to external force, the normally open contact is disconnected, and the tripping member 550 is in the first position, the normally closed contact is connected, and the test circuit is disconnected. When the test button 530 is driven by external force to slide in the direction of retracting the second housing 510, it drives the normally open contact to connect, thereby connecting the test circuit to trigger the tripping device 540 to drive the tripping member 550 to move from the first position to the second position, so that the tripping member 550 drives the circuit breaker to trip. The tripping member 550 also drives the normally closed contact to disconnect. At this time, because the normally closed contact is disconnected, even if the test button 530 is still subjected to external force to keep the normally open contact connected, the test circuit is disconnected. The leakage current action module and plug-in circuit breaker of this embodiment have leakage current fault tripping and leakage current testing functions. The test circuit is equipped with two breakpoints: one is a normally open breakpoint driven by the test button 530, and the other is a normally closed breakpoint driven by the tripping component 550. When the tripping component 550 trips the circuit breaker, it disconnects the test circuit through the normally closed breakpoint, thereby avoiding the safety hazard of the test circuit being energized for a long time due to the test button 530 being pressed for a long time, and improving safety and reliability.

[0084] The leakage current action component in this embodiment also includes a first elastic conductive element 580 and a second elastic conductive element 590. The first elastic conductive element 580 is provided with a first contact point 581 and a second contact point 582. The second housing 510 is provided with a fixed contact point 513. The first contact point 581 and the fixed contact point 513 are arranged opposite to each other to form the normally open break. The first elastic conductive element 580 is connected between the test button 530 and the second housing 510. When the test button 530 is driven by an external force to slide in the direction of retracting the second housing 510, it drives the first elastic conductive element 580 to store energy and drive the first contact point 581 and the fixed contact point 513 to contact, that is, the normally open break is turned on. When the external force on the test button 530 is removed, the first elastic conductive element 580 releases energy, driving the first contact point 581 and the fixed contact point 513 to separate, that is, the normally open break is turned off. The first elastic conductive element 580 also drives the test button 530 to slide in the direction of extending out of the second housing 510 to complete the reset. The first elastic conductive element 580 is multifunctional, serving both as a contact point to form a break in the test circuit and as a reset button 530. This reduces the number of parts, simplifies the structure, and improves the synchronization between the test circuit's on / off state and the operation of the test button 530.

[0085] The second elastic conductive element 590 is provided with a third contact point 591. The second contact point 582 and the third contact point 591 are arranged opposite each other to form the normally closed break. The second elastic conductive element 590 is connected between the tripping element 550 and the second housing 510. When the tripping element 550 moves from the first position to the second position, it drives the second elastic conductive element 590 to store energy and causes the third contact point 591 and the second contact point 582 to separate, that is, the normally closed break is opened. When the second elastic conductive element 590 releases energy, it causes the third contact point 591 and the second contact point 582 to contact, that is, the normally closed break is closed. The second elastic conductive element 590 also drives the tripping element 550 to move from the second position to the first position. The second elastic conductive element 590 has a multifunctional design, which not only provides a contact point to form a break in the test circuit, but also is used to reset the tripping element 550, reducing the number of parts, simplifying the structure, and improving the synchronization between the opening and closing of the test circuit and the action of the tripping element 550.

[0086] Preferably, the first elastic conductive element 580 is a torsion spring with two straight elastic arms. The first elastic conductive element 580 is located on the sliding side of the test button 530. The middle part of one elastic arm of the first elastic conductive element 580 is connected to the test button 530, and its end serves as the first contact point 581. The end of the other elastic arm of the first elastic conductive element 580 is bent to form the second contact point 582. Of course, the first elastic conductive element 580 can also be a compression spring, leaf spring, etc. The first elastic conductive element 580 has a simple structure, is easy to manufacture, and the test button 530 can reliably and stably drive the first elastic conductive element 580 to connect to the normal breaking point.

[0087] Preferably, the second elastic conductive element 590 is a torsion spring with two straight elastic arms. The second elastic conductive element 590 and the tripping element 550 are arranged along the central direction of the second elastic conductive element 590. The tripping element 550 has a protruding pushing part 553 on the side facing the second elastic conductive element 590. The middle part of one elastic arm of the second elastic conductive element 590 drives and cooperates with the pushing part 553, and the end serves as the third contact point 591. That is, the middle part of the elastic arm of the second elastic conductive element 590 is located on the trajectory of the pushing part 553 moving from the first position to the second position. Of course, the second elastic conductive element 590 can also be a compression spring, leaf spring, etc. The structure of the second elastic conductive element 590 is simple, easy to manufacture, and compactly arranged with the tripping element 550. The tripping element 550 can reliably and stably disconnect the normally closed contact by driving the second elastic conductive element 590 through the pushing part 553.

[0088] The leakage current actuation component in this embodiment also includes an indicator 560 and an elastic member 570 connected between the indicator 560 and the second housing 510. The second housing 510 is provided with an indicator hole 512. The indicator 560 is provided with a limiting part 561 and an indicator part 562 slidably disposed in the indicator hole 512. The tripping member 550 is provided with a locking part 551 that locks with the limiting part 561. When the leakage current detection module 100 does not detect leakage current, the leakage current actuation module 500 is not triggered. At this time, the tripping member 550 is in the first position. The locking part 551 and the limiting part 561 lock together, locking the indicator 560 back into the second housing 510 by overcoming the force of the elastic member 570. When the leakage current detection module 100 detects leakage current, it triggers the leakage current action module 500 to drive the tripping member 550 to trip the circuit breaker. At this time, the tripping member 550 moves from the first position to the second position, causing the locking part 551 and the limiting part 561 to release their locking engagement, so that the elastic member 570 releases energy to drive the indicator 560 to extend the indicator part 562 out of the indicator hole 512, thereby realizing the leakage fault indication.

[0089] Furthermore, the tripping member 550 is also provided with a mating part 552. When the indicating part 562 of the indicating member 560 extends out of the indicating hole 512, the limiting part 561 blocks the movement of the mating part 552 of the tripping member 550 from the second position to the first position. Figure 11-12 As shown, when the release member 550 moves from the first position to the second position, the locking part 551 and the limiting part 561 are released from their locking engagement, and the engaging part 5521 and the limiting part 561 are limited to their limiting engagement, thus the indicator member 560 limits the release member 550 to the second position, preventing it from moving to the first position; as shown Figure 9-10 As shown, when the indicator 560 slides towards the retracted second housing 510 under external force, the driving elastic member 570 stores energy and drives the mating part 5521 to release the limiting part 561 from the limiting engagement, so that the release member 550 moves from the second position to the first position under the drive of the second elastic conductive member 590. The release member 550 re-locks with the limiting part 561 through the locking part 551, locking the indicator 560 inside the retracted second housing 510, so that the elastic member 570 remains in the energy-storing state. After the leakage current test is completed, the indicator 560 is limited by the limiting part 561 and the cooperating part 552, which limits the tripping part 550 to the second position. That is, the second elastic conductive part 590 is locked in the energy storage state and the third contact point 591 and the second contact point 582 are separated. The normally closed contact is open, so that the test circuit is disconnected more reliably and stably. The indicator 560 needs to be pressed to retract the indicator 560 back into the second housing 510 so that the second elastic conductive part 590 can release energy and reconnect the normally closed contact. At this time, the test button 530 can be pressed to connect the normally open contact to connect the test circuit.

[0090] like Figure 8-9As shown, the circuit board 520 is matched and attached to the four sides of the second housing 510, and the circuit board 520 has a circuit board notch on one side in the second direction. All other parts of the leakage current action assembly except the circuit board 520 are located in the circuit board notch. Specifically, the indicator 560 and the test button 530 are slidably disposed along a first direction, the sliding hole 511 and the indicator hole 512 are spaced apart along a second direction at one end of the second housing 510 in the first direction, the test button 530 and the normally closed break are located on one side of the indicator 560 in the second direction, the normally open break is located on the other side of the indicator 560 in the second direction, that is, the first elastic conductive element 580 is located on one side of the indicator 560 in the second direction, the elastic arm with the first contact point 581 extends to the other side of the indicator 560 in the second direction, the trip unit 540 is located on one side of the indicator 560 in the first direction, the trip unit 550 is rotatably disposed between the indicator 560 and the trip unit 540, the rotation center of the trip unit 550 is disposed along a third direction, the center of the second elastic conductive element 590 is disposed along a third direction, that is, the second elastic conductive element 590 and the trip unit 550 are disposed along a third direction. Furthermore, the elastic element 570 is a compression spring with the elastic force direction arranged along the first direction, and the elastic element 570 is located between the indicator 560 and the test button 530 in the second direction. Of course, the elastic element 570 can also be a torsion spring, leaf spring, etc. The layout of the leakage current action module 500 is compact and reasonable, reducing the size of the leakage current action module 500.

[0091] like Figure 9 As shown, the indicator 560 is a long strip structure. The sliding direction (i.e., the first direction) of the indicator 560 has an indicator part 562 at one end and a boss structure serving as a limiting part 561 on one side at the other end in the second direction.

[0092] like Figure 9-10 As shown, the tripping member 550 includes a first rotating arm 554 and a second rotating arm 555. One end of the first rotating arm 554 and the second rotating arm 555 are connected to form a rotating connection portion that is rotatably connected to the second housing 510. The other end of the first rotating arm 554 is located between the tripping device 540 and the indicator 560 in a first direction. When the tripping device 540 is triggered, the tripping member 550 is rotated by pushing the first rotating arm 554. The other end of the second rotating arm 555 is located on one side of the indicator 560 in a second direction and is opposite to the limiting part 561. Preferably, the other end of the second rotating arm 555 of the tripping member 550 facing the limiting part 561 has a recessed structure as a locking part 551 and a boss structure as a mating part 552 arranged sequentially along the sliding direction of the indicator 560. The other end of the second rotating arm 555 of the tripping member 550 facing the second elastic conductive member 590 has a boss structure as a pushing part 553.

[0093] In this embodiment, as Figure 8-9 As shown, the second housing 510 of the leakage current operating module 500 has a second linkage hole 514 on the side adjacent to the circuit breaker pole 400 of the circuit breaker module. A linkage shaft 515 is installed in the second linkage hole 514. One end of the linkage shaft 515 extends out of the second housing 510, passes through the first linkage hole on the first housing 403 of the adjacent circuit breaker pole 400, and is connected to the latch 425 of the operating mechanism 420. The other end of the linkage shaft 515 is located in the second housing 510 and is driven to cooperate with the tripping member 550 of the leakage current operating module 500. That is, the linkage shaft 515 is located on the trajectory of the first rotating arm 554 of the tripping member 550 moving from the first position to the second position. The second housing 510 of the leakage current operating module 500 includes two half-shell structures that overlap each other and are arranged in a third direction.

[0094] like Figure 13-14 The diagram shows a second embodiment of a plug-in circuit breaker. Unlike the first embodiment, this embodiment uses a rear-in, front-out wiring configuration. The first terminal 450 of the circuit breaker pole 400 is used for external connection, serving as the output terminal of the plug-in circuit breaker. The second terminal 460 of the circuit breaker pole 400 is used for electrical connection to the second conductive system 300 of the leakage current detection module 100, which serves as the input terminal of the plug-in circuit breaker. The layout of the first terminal 450 and the second terminal 460 in this embodiment shows that the second terminal 460 is located on the circuit breaker pole 400. The first terminal 401 of the circuit breaker pole 400 is located at the second terminal 402 of the circuit breaker pole 400, on one side of the operating member 410 (i.e., above the operating button 410) in the second direction, and on one side of the end of the operating mechanism 420 that is connected to the moving contact 430 in the first direction; the arc-extinguishing chamber 800 is located between the electromagnetic system 600 and the second terminal 460 in the first direction; one end of the bimetallic strip 710 in the first direction is located on the side of the moving contact 430 away from the electromagnetic system 600 in the second direction, and the other end of the bimetallic strip 710 in the first direction is located on one side of the arc-extinguishing chamber 800 in the second direction.

[0095] The difference from the first embodiment is that the leakage detection module 100 in this embodiment does not have a first conductive system, and the second conductive structure 310 of its second conductive system 300 is different from that in the first embodiment. In this embodiment, the second connection end 311 of one end of the second conductive structure 310 is an L-shaped structure, and the other end of the second conductive structure 310 connected to the fourth terminal 320 passes through the current transformer 110, and is preferably a wire structure, but it can also be a conductive plate structure.

[0096] Unlike the first embodiment, the first terminal 450 in this embodiment is a screw-type terminal. The circuit breaker module in this embodiment also includes a third terminal block 452 and a third flexible connector 453. One end of the third terminal block 452 is inserted into the first terminal 450 for external wiring. The third terminal block 452 and the third flexible connector 453 are electrically connected between the bimetallic strip 710 and the first terminal 450, i.e., the moving contact 430, bimetallic strip 710, third flexible connector 453, third terminal block 452, and first terminal 450 are sequentially electrically connected. The third terminal block 452 is parallel to the first direction. One end of the third terminal block 452 in the first direction is inserted into the first terminal 450, and in the second direction, it is located on the side away from the electromagnetic system 600 where the operating mechanism 420 is connected to the moving contact 430. The other end of the third terminal block 452 in the first direction is located on the side of the bimetallic strip 710 away from the magnetically conductive structure 900 in the second direction. Alternatively, the third flexible connector 453 can be replaced by a conductive plate structure.

[0097] refer to Figure 2 The third embodiment of the plug-in circuit breaker (not shown in the figure) differs from the first embodiment in that the plug-in circuit breaker in this embodiment adopts a rear-in, front-out wiring method. The second terminal 460 of the circuit breaker pole 400 in this embodiment is used for external connection as the output terminal of the plug-in circuit breaker. The first terminal 450 of the circuit breaker pole 400 in this embodiment is electrically connected to the wiring structure of the leakage current detection module 100, and the wiring structure of the leakage current detection module 100 serves as the input terminal of the plug-in circuit breaker. In this embodiment, the layout structure of the first terminal 450 and the second terminal 460 is such that the two opposite ends of the circuit breaker pole 400 in the first direction are the first end 401 and the second end 402. The second terminal 460 is located at the first end 401 of the circuit breaker pole 400 and the second terminal 460 is located at the second end 402 of the circuit breaker pole 400. In the second direction, it is located on one side of the operation button 410 (i.e., below the operation button 410) and in the first direction, it is located on the side of the electromagnetic system 600 away from the arc-extinguishing chamber 800.

[0098] It should be noted that in the description of this utility model, the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used during use. They are only for ease of description and do not indicate that the device or component referred to must have a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating relative importance.

[0099] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. A plug-in circuit breaker, comprising a circuit breaker module, a leakage current operating module (500), and a leakage current detection module (100), wherein the circuit breaker module includes multiple circuit breaker poles (400), characterized in that: The circuit breaker module has multiple circuit breaker poles (400) arranged side by side along a third direction. The circuit breaker poles (400) and the leakage current action module (500) of the circuit breaker module are arranged side by side along a third direction. The leakage current detection module (100) is arranged side by side with the circuit breaker poles (400) and the leakage current action module (500) of the circuit breaker module in a first direction. Each circuit breaker pole (400) includes an operating element (410), a moving contact (430), a stationary contact (440), an operating mechanism (420) drively connected between the operating element (410) and the moving contact (430), a first terminal (450) and a second terminal (460) electrically connected to the moving contact (430) and the stationary contact (440), and an electromagnetic system (600) for driving the operating mechanism (420) to trip; the operating element (410) is movably disposed at the second end (440) of the circuit breaker pole (400). 02), the electromagnetic system (600) is located on one side of the operating member (410) in the first direction, and the length direction of the electromagnetic system (600) is set at an angle α with the first direction, the angle α being 70° to 110°. The end of the operating mechanism (420) that is connected to the moving contact (430) and the moving contact (430) are located on one side of the electromagnetic system (600) in the second direction. The stationary contact point (441) of the stationary contact (440) is located between the electromagnetic system (600) and the moving contact (430) in the second direction. The first direction, the second direction, and the third direction are perpendicular to each other.

2. The plug-in circuit breaker according to claim 1, characterized in that: The electromagnetic system (600) is tilted toward the operating member (410), and the tilt angle between the length direction of the electromagnetic system (600) and the second direction is 10° to 20°.

3. The plug-in circuit breaker according to claim 1 or 2, characterized in that: The electromagnetic system (600) includes a moving iron core (630), and the direction of motion of the moving iron core (630) of the electromagnetic system (600) is parallel to the length direction of the electromagnetic system (600).

4. The plug-in circuit breaker according to claim 1, characterized in that: Each circuit breaker pole (400) further includes a thermal system (700) for driving the operating mechanism (420) to trip, and an arc-extinguishing chamber (800); the thermal system (700) includes a bimetallic strip (710) electrically connected between the moving contact (430) and the first terminal (450), and the electromagnetic system (600) is located between the operating member (410) and the arc-extinguishing chamber (800) in a first direction; the bimetallic strip (710) is at least partially located on the side of the moving contact (430) away from the electromagnetic system (600) in a second direction.

5. The plug-in circuit breaker according to claim 4, characterized in that: The circuit breaker pole (400) has a first end (401) and a second end (402) at opposite ends in a first direction. The first terminal (450) and the second terminal (460) are spaced apart and opposite to each other in a second direction at the first end (401) of the circuit breaker pole (400). The arc-extinguishing chamber (800) is located between the electromagnetic system (600) and the second terminal (460) in the first direction. One end of the bimetallic strip (710) in the first direction is located on the side of the moving contact (430) away from the electromagnetic system (600) in the second direction, and the other end of the bimetallic strip (710) in the first direction is located on the side of the first terminal (450) away from the second terminal (460) in the second direction.

6. The plug-in circuit breaker according to claim 4, characterized in that: The circuit breaker pole (400) has a first end (401) and a second end (402) at opposite ends in the first direction. The second terminal (460) is disposed at the first end (401) of the circuit breaker pole (400), and the first terminal (450) is disposed at the second end (402) of the circuit breaker pole (400). The first terminal (450) is located on one side of the operating member (410) in the second direction and on one side of the end of the operating mechanism (420) that is connected to the moving contact (430) in the first direction. The arc-extinguishing chamber (800) is located between the electromagnetic system (600) and the second terminal (460) in the first direction. One end of the bimetallic strip (710) in the first direction is located on the side of the moving contact (430) away from the electromagnetic system (600) in the second direction, and the other end of the bimetallic strip (710) in the first direction is located on one side of the arc-extinguishing chamber (800) in the second direction.

7. The plug-in circuit breaker according to any one of claims 4-6, characterized in that: Each circuit breaker pole (400) further includes a magnetically conductive structure (900), which is located in the area enclosed by the bimetallic strip (710), the moving contact (430), the stationary contact (440), and the arc-extinguishing chamber (800). The magnetically conductive structure (900) includes two magnetically conductive plates (910) that are parallel and spaced apart along a third direction, and the first direction, the second direction, and the third direction are perpendicular to each other.

8. The plug-in circuit breaker according to claim 7, characterized in that: The electromagnetic system (600) is inclined toward the operating member (410), and the tilt angle between the length direction of the electromagnetic system (600) and the second direction is 10° to 20°. The magnetic guiding structure (900) and the arc-extinguishing chamber (800) are respectively inclined toward the electromagnetic system (600), and the tilt angle between the magnetic guiding structure (900) and the arc-extinguishing chamber (800) and the second direction is the same as the tilt angle between the length direction of the electromagnetic system (600) and the second direction.

9. The plug-in circuit breaker according to claim 1, characterized in that: The circuit breaker pole (400) has a dimension of 72-76 mm in the first direction and a dimension of 38-42 mm in the second direction; the leakage current action module (500) has the same dimension as the circuit breaker pole (400) in the first direction and the same dimension in the second direction; the leakage current detection module (100) has a dimension of 38 mm in the first direction and the same dimension as the circuit breaker pole (400) in the second direction.

10. The plug-in circuit breaker according to claim 9, characterized in that: The circuit breaker pole (400) has a dimension of 74 mm in the first direction, 40 mm in the second direction, and 15 mm in the third direction. The leakage current action module (500) has the same dimensions as the circuit breaker pole (400) in the first, second, and third directions. The leakage current detection module (100) has a dimension of 38 mm in the first direction, 40 mm in the second direction, and 60 mm in the third direction.

11. The plug-in circuit breaker according to claim 5, characterized in that: The leakage current detection module (100) includes a current transformer (110), a multi-pole first conductive system and a multi-pole second conductive system (300). Each pole first conductive system includes a first conductive structure (210) and a third terminal (220). The first conductive structure (210) of each pole first conductive system passes through the current transformer (110) and its two ends are located on both sides of the current transformer (110). One end of the first conductive structure (210) is a first connection end (211) connected to the first terminal (450) of the circuit breaker pole (400) of the corresponding pole, and the other end is connected to the third terminal (220). The first connection end (211) and the third terminal (220) of each pole first conductive system are spaced apart and arranged in a row. The distance between the center lines of the first connection end (211) of the first conductive system of adjacent poles is smaller than the distance between the center lines of their third terminals (220). Each pole of the second conductive system (300) includes a second conductive structure (310) and a fourth terminal (320). One end of the second conductive structure (310) is a second connection end (311) connected to the second terminal (460) of the corresponding pole of the circuit breaker pole (400), and the other end is connected to the fourth terminal (320). The second connection end (311) and the fourth terminal (320) of each pole of the second conductive system (300) are arranged at intervals and in rows. The distance between the center lines of the second connection end (311) of the second conductive system (300) of adjacent poles is smaller than the distance between the center lines of their fourth terminals (320).

12. The plug-in circuit breaker according to claim 11, characterized in that: The current transformer (110) has a current transformer through hole, which is provided through the current transformer (110) along a first direction and is used for the first conductive structure (210) to pass through; the second conductive system (300) is located on the same side of the current transformer (110) and the first conductive system in a second direction; the first connection terminal (211) and the third terminal (220) of each pole of the first conductive system are respectively located on both sides of the current transformer (110) in the first direction, and the first connection terminal (211) and the third terminal (220) are spaced apart in the second direction, and the first connection terminal (211) and the third terminal (220) of each pole of the first conductive system are spaced apart and arranged in a row along a third direction; the second connection terminal (311) and the fourth terminal (320) of each pole of the second conductive system (300) are spaced apart and arranged in a row along a third direction.

13. The plug-in circuit breaker according to claim 1, characterized in that: The leakage current action module (500) includes a second housing (510), a circuit board (520), a test button (530), a trip unit (540), and a tripping element (550). The circuit board (520) is assembled inside the second housing (510) and has a test circuit. The second housing (510) has a sliding hole (511). The test button (530) is slidably disposed in the sliding hole (511) of the second housing (510). The trip unit (540) is assembled inside the second housing (510) and drives the tripping element (550). The tripping element (550) is disposed inside the second housing (510) and can move between a first position and a second position. The test circuit has a normally open break and a normally closed break. The test button (530) is used to drive the normally open break to connect and disconnect, and the tripping element (550) is used to drive the normally closed break to connect and disconnect. When the test button (530) is slid by an external force, the normally open contact is connected, thereby connecting the test circuit to trigger the trip unit (540) to drive the tripping component (550) to move from the first position to the second position, so that the tripping component (550) drives the circuit breaker to trip. At the same time, the tripping component (550) also drives the normally closed contact to open.

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