Electricity taking structure of residual-current circuit breaker and residual-current circuit breaker

Abstract

The utility model belongs to the technical field of circuit breakers, and discloses an electricity taking structure of a residual-current circuit breaker and the residual-current circuit breaker. The electric leakage circuit breaker comprises a handle, an electric leakage circuit board and an electromagnetic release. The electricity taking structure of the residual-current circuit breaker comprises a first conductive piece and a handle spring. Wherein one end of the first conductive piece is electrically connected to the electromagnetic release, and the other end of the first conductive piece is close to the handle; the handle spring is installed on the handle and comprises a fixed end and a movable end, the fixed end is electrically connected with the electric leakage circuit board, and the movable end can make contact with and be electrically connected with the first conductive piece along with switching-on of the handle so that the electric leakage circuit board can be powered on and can be separated from the first conductive piece along with switching-off of the handle so that the electric leakage circuit board can be powered off. The electricity taking structure of the electric leakage circuit breaker can effectively disconnect the electric leakage loop under the condition of reverse wiring of the electric leakage circuit breaker, effectively reduces the failure risk of the electric leakage circuit breaker, and is simple in structure, low in cost and high in working reliability.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, and in particular to a power supply structure for a residual current circuit breaker and the residual current circuit breaker itself. Background Technology

[0002] In traditional residual current circuit breakers (RCCBs), the circuit board typically draws power from the load side. When the circuit breaker uses a top-in, bottom-out wiring configuration, there is no voltage at the load side after the circuit breaker trips. However, when the circuit breaker is reverse-wired, the circuit board draws power from the power source. If leakage current occurs in the circuit or the test button is pressed, the leakage current triggers the thyristor to conduct the leakage circuit, causing the residual current trip device to trip the circuit breaker. At this time, the circuit board still has power input, and once the thyristor is triggered, it cannot be cut off. The leakage circuit continues to conduct, and prolonged energization will cause the coil to overheat and burn out, ultimately leading to the failure of the RCCB.

[0003] Therefore, there is an urgent need to propose a power supply structure for a residual current circuit breaker and a residual current circuit breaker in order to solve the above-mentioned technical problems. Utility Model Content

[0004] According to one aspect of the present invention, the present invention provides a power supply structure for a residual current circuit breaker, which can effectively disconnect the leakage circuit even when the residual current circuit breaker is reverse-wired, effectively reducing the failure risk of the residual current circuit breaker, and has a simple structure, low cost, and high reliability.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] The power supply structure of the residual current circuit breaker includes a handle, a residual current circuit board, and an electromagnetic trip unit. The power supply structure of the residual current circuit breaker includes:

[0007] A first conductive element, one end of which is electrically connected to the electromagnetic trip unit, and the other end of which is close to the handle;

[0008] A handle spring is installed on the handle. The handle spring includes a fixed end and a movable end. The fixed end is electrically connected to the leakage circuit board. The movable end can make contact with the first conductive element when the handle is closed, so as to energize the leakage circuit board. It can also be separated from the first conductive element when the handle is opened, so as to de-energize the leakage circuit board.

[0009] Optionally, the first conductive element is a conductive spring, one end of which is connected to the magnetic yoke of the electromagnetic trip device, and when the handle is closed, the other end of the conductive spring elastically abuts against the movable end.

[0010] Optionally, the conductive spring sheet is formed by bending to form a first conductive segment, a second conductive segment, and a third conductive segment connected in sequence. The first conductive segment is connected to the magnetic yoke, and the third conductive segment is used to elastically engage with the movable end.

[0011] The conductive spring is installed inside the circuit breaker housing. The inner wall of the circuit breaker housing is provided with two first protrusions, which are spaced apart to form a slot. The connection between the second conductive segment and the third conductive segment is engaged in the slot.

[0012] Optionally, the residual current circuit breaker further includes a second conductive element, one end of which is connected to the fixed end, and the other end of which is connected to the residual current circuit board.

[0013] Optionally, the handle spring is disposed inside the circuit breaker housing, and the circuit breaker housing is provided with a first through hole opposite to the fixed end;

[0014] The leakage circuit board is mounted on the leakage module base. The leakage module base is provided with a second through hole corresponding to the leakage circuit board and a clearance groove connected to the second through hole. The clearance groove is located on the outer wall of the leakage module base near the circuit breaker housing.

[0015] The second conductive component includes a first connecting segment, a second connecting segment, and a third connecting segment connected in sequence. The first connecting segment passes through the first through hole and is connected to the fixed end. The second connecting segment is placed in the clearance groove. The third connecting segment passes through the second through hole and is connected to the leakage circuit board.

[0016] Optionally, the end of the first connecting segment abuts against the fixed end, and the portion of the first connecting segment located outside the circuit breaker housing is bent to form the second connecting segment, which abuts against the third connecting segment; or, the second conductive element is a torsion spring, the helical portion of the torsion spring is installed in the second through hole, the first torsion arm of the torsion spring is the third connecting segment, and the second torsion arm of the torsion spring is bent to form the second connecting segment and the first connecting segment, with the end of the first connecting segment elastically abutting against the fixed end.

[0017] Optionally, the two opposite inner walls of the clearance groove are provided with second locking protrusions, and the second connecting section is engaged between the two opposite second locking protrusions.

[0018] Optionally, the circuit breaker housing includes a circuit breaker base and a circuit breaker cover disposed on the circuit breaker base. The circuit breaker base is provided with a limiting groove, and the fixed end is snapped into the limiting groove. The circuit breaker cover is provided with a first through hole, which is disposed opposite to the limiting groove. The circuit breaker cover is attached to the leakage current module base.

[0019] Optionally, the handle is rotatably mounted on the circuit breaker housing. An arc-shaped baffle is provided on the inner wall of the circuit breaker housing around the rotating base of the handle. The arc-shaped baffle is used to prevent the electric arc generated when the movable end separates from the first conductive element from being sprayed to the outside of the circuit breaker housing.

[0020] According to another aspect of the present invention, the present invention also provides a residual current circuit breaker, comprising a circuit breaker module, a residual current module, and a power supply structure for the residual current circuit breaker as described in any of the above technical solutions, wherein the power supply structure for the residual current circuit breaker is disposed in the circuit breaker module.

[0021] The beneficial effects of this utility model are:

[0022] This utility model provides a power supply structure for a residual current circuit breaker (RCCB), including a first conductive element and a handle spring. If the RCCB is reverse-wired, when the RCCB is tripped, the movable end of the handle spring separates from the first conductive element, and no current is input to the residual current circuit board. When the RCCB is closed, the handle drives the movable end of the handle spring to contact the first conductive element, and current is input to the residual current circuit board, allowing it to operate normally. When leakage current occurs in the main circuit or the test button is pressed, current is generated in the leakage circuit, causing the electromagnetic trip device to activate. The activation of the electromagnetic trip device trips the RCCB, and the handle drives the handle spring to separate from the first conductive element, disconnecting the power supply to the residual current circuit board. In other words, this RCCB can effectively disconnect the leakage circuit even when reverse-wired, effectively reducing the failure risk of the RCCB. Furthermore, it has a simple structure, low cost, and high reliability.

[0023] By cleverly utilizing the original handle spring used for handle reset, the movable end of the handle spring can be used to perform both conduction and disconnection of leakage current return, simplifying the structure of the leakage circuit breaker and facilitating assembly.

[0024] By setting a first conductive element, the movable end of the handle spring can draw power from the nearby electromagnetic trip unit, which optimizes the power draw path of the leakage circuit board and further simplifies the structure of the leakage circuit breaker.

[0025] This utility model also provides a residual current circuit breaker, including a circuit breaker module, a residual current module, and the aforementioned power supply structure of the residual current circuit breaker. Because this residual current circuit breaker adopts the aforementioned power supply structure, it can effectively disconnect the residual current circuit even in reverse wiring situations, effectively reducing the failure risk of the residual current circuit breaker. Furthermore, it has a simple structure, low cost, and high operational reliability. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the residual current circuit breaker provided in this embodiment of the utility model;

[0028] Figure 2 This is a schematic diagram of the power supply structure of the residual current circuit breaker provided in this embodiment of the utility model;

[0029] Figure 3 This is an assembly diagram of the power supply structure and the base of the residual current circuit breaker provided in this embodiment of the utility model;

[0030] Figure 4 yes Figure 3 Enlarged view at point A.

[0031] In the picture:

[0032] 10. Circuit breaker module; 11. Handle; 101. Rotating base; 12. Electromagnetic trip unit; 121. Magnetic yoke; 13. Circuit breaker housing; 103. Circuit breaker base; 1031. Limiting groove; 131. First locking protrusion; 132. Arc-shaped baffle; 20. Residual current module; 21. Residual current circuit board; 22. Residual current module base; 221. Second through hole; 222. Clearance groove; 223. Second locking protrusion;

[0033] 100. First conductive element; 111. First conductive segment; 112. Second conductive segment; 113. Third conductive segment; 200. Handle spring; 210. Fixed end; 220. Movable end; 300. Second conductive element; 310. First connecting segment; 320. Second connecting segment; 330. Third connecting segment. Detailed Implementation

[0034] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0035] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0036] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0037] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0038] This embodiment provides a power supply structure for a residual current circuit breaker (RCCB), which can effectively disconnect the leakage circuit even when the RCCB is reverse-wired, effectively reducing the failure risk of the RCCB. It also has a simple structure, low cost, and high reliability.

[0039] like Figure 1As shown, a residual current circuit breaker generally includes a circuit breaker module 10 and a residual current module 20. In one possible embodiment, the circuit breaker module 10 can be a 3P circuit breaker, that is, the circuit breaker module 10 includes an A-phase circuit breaker, a B-phase circuit breaker, and a C-phase circuit breaker. Of course, in other possible embodiments, the circuit breaker module 10 can also be a 2P circuit breaker, etc., depending on actual needs.

[0040] like Figure 2 As shown, each phase circuit breaker in the circuit breaker module 10 includes a handle 11 for opening and closing and an electromagnetic trip unit 12. Since the structure and working principle of the handle 11 and the electromagnetic trip unit 12 are existing technologies, their specific structures will not be described in detail.

[0041] like Figure 2 As shown, the leakage current module 20 includes a leakage current circuit board 21. The leakage current circuit board 21 detects leakage current by monitoring the current change in the circuit and triggers the electromagnetic trip unit 12 to cut off the power supply when leakage current occurs.

[0042] like Figures 2-4 As shown, the power-taking structure of the residual current device (RCD) includes a first conductive element 100 and a handle spring 200. One end of the first conductive element 100 is electrically connected to the electromagnetic trip unit 12, and the other end is close to the handle 11. The handle spring 200 is mounted on the handle 11 and includes a fixed end 210 and a movable end 220. The fixed end 210 is electrically connected to the residual current circuit board 21, and the movable end 220 can make contact with the first conductive element 100 when the handle 11 is closed, thus energizing the residual current circuit board 21, and can separate from the first conductive element 100 when the handle 11 is opened, thus de-energizing the residual current circuit board 21. It is understood that the fixed end 210 of the handle spring 200 remains fixed to maintain electrical connection with the residual current circuit board 21 at all times.

[0043] To facilitate understanding, the power supply principle of the residual current circuit board 21 will be introduced using the reverse wiring of the residual current circuit breaker as an example:

[0044] When the residual current circuit breaker trips, the handle 11 is in the tripped position, the movable end 220 of the handle spring 200 is separated from the first conductive element 100, and there is no current input to the residual current circuit board 21.

[0045] When the residual current circuit breaker is closed, the handle 11 rotates to the closed position, causing the movable end 220 of the handle spring 200 to contact the first conductive element 100. This allows the residual current circuit board 21 to draw power from the electromagnetic trip unit 12 through the handle spring 200 and the first conductive element 100. In other words, the residual current circuit board 21 has current input and can operate normally. When leakage current occurs in the main circuit or the test button is pressed, current is generated in the leakage circuit, causing the electromagnetic trip unit 12 to activate. The activation of the electromagnetic trip unit 12 trips the residual current circuit breaker, and the handle 11 causes the handle spring 200 to separate from the first conductive element 100, disconnecting the power supply to the residual current circuit board 21.

[0046] Therefore, this residual current circuit breaker can effectively disconnect the leakage current circuit through the handle spring 200 when the wiring is reversed, which effectively reduces the failure risk of the residual current circuit breaker. It also has a simple structure, low cost, and high reliability.

[0047] Furthermore, the power supply structure of this residual current circuit breaker cleverly utilizes the original handle spring 200 used for resetting the handle 11, allowing the movable end 220 of the handle spring 200 to also perform the conduction and disconnection of residual current return, simplifying the structure of the residual current circuit breaker and facilitating assembly. Moreover, by setting the first conductive element 100, the movable end 220 of the handle spring 200 can draw power from the nearby electromagnetic trip unit 12, optimizing the power supply path of the residual current circuit board 21 and further simplifying the structure of the residual current circuit breaker.

[0048] Optionally, see [link to relevant documentation] Figure 4 In one possible embodiment, the first conductive element 100 is a conductive spring, one end of which is connected to the magnetic yoke 121 of the electromagnetic trip unit 12. When the handle 11 is closed, the other end of the conductive spring elastically abuts against the movable end 220. By setting the first conductive element 100 to be a conductive spring, the contact between the movable end 220 and the first conductive element 100 is elastic abutting. Compared with the contact between the first conductive element 100 and the movable end 220 being merely a close contact, the reliability of the electrical connection between the movable end 220 and the first conductive element 100 is higher, and the requirements for the installation accuracy of the first conductive element 100 can also be reduced.

[0049] Optionally, see [link to relevant documentation] Figure 4The conductive spring is formed by bending to create a first conductive segment 111, a second conductive segment 112, and a third conductive segment 113 connected in sequence. The first conductive segment 111 is connected to the magnetic yoke 121, and the third conductive segment 113 is used for elastic engagement with the movable end 220. The conductive spring is installed inside the circuit breaker housing 13. Two first locking protrusions 131 are provided on the inner wall of the circuit breaker housing 13, and the two first locking protrusions 131 are spaced apart to form a locking groove. The connection between the second conductive segment 112 and the third conductive segment 113 is engaged in the locking groove. This first conductive component 100 has a simple structure and is easy to manufacture; for example, it can be manufactured by bending. Furthermore, the conductive spring is fixed by the two first locking protrusions 131, ensuring the reliability of the conductive spring installation while facilitating its installation and replacement.

[0050] Alternatively, in one possible embodiment, the conductive spring is mounted on the circuit breaker base 103.

[0051] Optionally, in this embodiment, the second connecting segment 320 and the third connecting segment 330 are in a "V" shape, and the first latching protrusion 131 is also in a "V" shape that matches the second connecting segment 320 and the third connecting segment 330.

[0052] Further, see also Figure 3 and Figure 4 The handle 11 is generally rotatably mounted on the circuit breaker housing 13, and to ensure smooth rotation of the handle 11, there is generally a gap between the rotating base 101 of the handle 11 and the circuit breaker housing 13. When the handle 11 is opened, the moving end 220 separates from the first conductive element 100, generating an electric arc. This arc can easily be ejected outward from the gap between the rotating base 101 of the handle 11 and the circuit breaker housing 13, posing a significant safety hazard. Therefore, to solve this problem, an arc-shaped baffle 132 can be provided on the inner wall of the circuit breaker housing 13, around the rotating base 101 of the handle 11. The arc-shaped baffle 132 is used to prevent the electric arc generated when the moving end 220 separates from the first conductive element 100 from being ejected outward from the circuit breaker housing 13.

[0053] Further, see also Figure 2 The residual current circuit breaker also includes a second conductive element 300. One end of the second conductive element 300 is connected to the fixed end 210, and the other end is connected to the residual current circuit board 21. That is, the second conductive element 300 serves as a bridge for conductive connection between the fixed end 210 and the residual current circuit board 21. This design facilitates assembly and eliminates the need to modify the original handle spring 200.

[0054] Optionally, see [link to relevant documentation] Figure 2In one possible embodiment, the handle spring 200 is disposed inside the circuit breaker housing 13, and the circuit breaker housing 13 has a first through hole (not shown in the figure) opposite to the fixed end 210. The leakage circuit board 21 is mounted on the leakage module base 22, and the leakage module base 22 has a second through hole 221 corresponding to the leakage circuit board 21 and a clearance groove 222 communicating with the second through hole 221. The clearance groove 222 is disposed on the outer wall of the leakage module base 22 near the circuit breaker housing 13. The second conductive element 300 includes a first connecting segment 310, a second connecting segment 320, and a third connecting segment 330 connected in sequence. The first connecting segment 310 passes through the first through hole and is connected to the fixed end 210; the second connecting segment 320 is placed in the clearance groove 222; and the third connecting segment 330 passes through the second through hole 221 and is connected to the leakage circuit board 21. This configuration allows the second conductive element 300 to be limited by the first through hole, the clearance slot 222, and the second through hole 221, improving the stability of the installation of the second conductive element 300. Furthermore, by setting the clearance slot 222, it is possible to ensure that the leakage current module base 22 fits snugly with the circuit breaker housing 13, which is beneficial to improving the structural compactness of the leakage current circuit breaker.

[0055] Optionally, see [link to relevant documentation] Figure 2 In one possible embodiment, the end of the first connecting segment 310 abuts against the fixed end 210, that is, the first connecting segment 310 and the fixed end 210 are in contact electrical connection, which facilitates assembly.

[0056] Optionally, see [link to relevant documentation] Figure 2 In one possible embodiment, the portion of the first connecting segment 310 located outside the circuit breaker housing 13 is bent to form the second connecting segment 320 for ease of processing. Furthermore, the second connecting segment 320 abuts against the third connecting segment 330, meaning there is a contact electrical connection between the second connecting segment 320 and the third connecting segment 330; this arrangement facilitates assembly.

[0057] Optionally, the second conductive element 300 can be a torsion spring. Specifically, the helical portion of the torsion spring is fixed inside the second through hole 221. The first torsion arm of the torsion spring is the third connecting segment 330, that is, the first torsion arm is connected to the leakage circuit board 21. The second torsion arm of the torsion spring is bent to form a second connecting segment 320 and a first connecting segment 310. The end of the first connecting segment 310 elastically abuts against the fixed end 210. This second conductive element 300 has a simple structure, is easy to assemble, and can maintain contact with the fixed end 210 through elasticity, thereby improving the reliability of the electrical connection between the fixed end 210 and the second conductive element 300.

[0058] Further, see also Figure 2The two opposing inner walls of the recessed groove 222 are provided with second locking protrusions 223, and the second connecting section 320 is engaged between the two opposing second locking protrusions 223. This arrangement can fix the second connecting section 320 by the two opposing second locking protrusions 223, further improving the installation stability of the second conductive component 300.

[0059] Optionally, multiple pairs of second locking protrusions 223 can be provided along the extension direction of the clearance groove 222.

[0060] Optionally, see [link to relevant documentation] Figure 3 and Figure 4 The circuit breaker housing 13 includes a circuit breaker base 103 and a circuit breaker cover (not shown in the figure) covering the circuit breaker base 103. The circuit breaker base 103 has a limiting groove 1031, and a fixing end 210 is engaged within the limiting groove 1031. The circuit breaker cover has a first through hole, which is opposite to the limiting groove 1031. The circuit breaker cover is attached to the residual current module base 22. The fixing end 210 of the handle spring 200 is fixed via the limiting groove 1031, resulting in a simple structure and facilitating the assembly of the handle spring 200. The first through hole on the circuit breaker cover attached to the residual current module base 22 facilitates the assembly of the second conductive component 300.

[0061] This embodiment also provides a residual current circuit breaker, including a circuit breaker module 10, a residual current module 20, and the power supply structure of the residual current circuit breaker described above. The power supply structure of the residual current circuit breaker is disposed in the circuit breaker module 10.

[0062] Because this residual current circuit breaker adopts the aforementioned power supply structure, it can effectively disconnect the leakage circuit even in reverse wiring, effectively reducing the failure risk of the residual current circuit breaker. In addition, it has a simple structure, low cost, and high reliability.

[0063] Optionally, in this embodiment, the circuit breaker module 10 is a 3P circuit breaker, and the power supply structure of the residual current circuit breaker is located in the circuit breaker adjacent to the residual current module 20. This arrangement avoids long-distance wiring and reduces assembly difficulty.

[0064] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A power supply structure for a residual current circuit breaker, the residual current circuit breaker comprising a handle (11), a residual current circuit board (21), and an electromagnetic trip unit (12), characterized in that, The power supply structure of the residual current circuit breaker includes: A first conductive element (100) is provided, one end of which is electrically connected to the electromagnetic trip unit (12), and the other end of which is close to the handle (11). A handle spring (200) is installed on the handle (11). The handle spring (200) includes a fixed end (210) and a movable end (220). The fixed end (210) is electrically connected to the leakage circuit board (21). The movable end (220) can make contact with the first conductive element (100) when the handle (11) is closed, so as to energize the leakage circuit board (21). It can also be separated from the first conductive element (100) when the handle (11) is opened, so as to de-energize the leakage circuit board (21).

2. The power supply structure of the residual current circuit breaker according to claim 1, characterized in that, The first conductive element (100) is a conductive spring. One end of the conductive spring is connected to the magnetic yoke (121) of the electromagnetic trip device (12). When the handle (11) is closed, the other end of the conductive spring elastically abuts against the movable end (220).

3. The power extraction structure of the residual current circuit breaker according to claim 2, characterized in that, The conductive spring sheet is formed by bending to form a first conductive segment (111), a second conductive segment (112), and a third conductive segment (113) connected in sequence. The first conductive segment (111) is connected to the magnetic yoke (121), and the third conductive segment (113) is used to elastically engage with the movable end (220). The conductive spring is installed inside the circuit breaker housing (13). The inner wall of the circuit breaker housing (13) is provided with two first locking protrusions (131). The two first locking protrusions (131) are spaced apart to form a locking groove. The connection between the second conductive segment (112) and the third conductive segment (113) is engaged in the locking groove.

4. The power supply structure of the residual current circuit breaker according to any one of claims 1-3, characterized in that, The leakage circuit breaker also includes a second conductive element (300), one end of which is connected to the fixed end (210), and the other end of which is connected to the leakage circuit board (21).

5. The power supply structure of the residual current circuit breaker according to claim 4, characterized in that, The handle spring (200) is disposed inside the circuit breaker housing (13), and the circuit breaker housing (13) is provided with a first through hole opposite to the fixed end (210); The leakage circuit board (21) is installed on the leakage module base (22). The leakage module base (22) is provided with a second through hole (221) corresponding to the leakage circuit board (21) and a clearance slot (222) connected to the second through hole (221). The clearance slot (222) is provided on the outer wall of the leakage module base (22) near the circuit breaker housing (13). The second conductive element (300) includes a first connecting segment (310), a second connecting segment (320) and a third connecting segment (330) connected in sequence. The first connecting segment (310) passes through the first through hole and is connected to the fixed end (210). The second connecting segment (320) is placed in the clearance groove (222). The third connecting segment (330) passes through the second through hole (221) and is connected to the leakage circuit board (21).

6. The power extraction structure of the residual current circuit breaker according to claim 5, characterized in that, The end of the first connecting segment (310) abuts against the fixed end (210), and the portion of the first connecting segment (310) located outside the circuit breaker housing (13) is bent to form the second connecting segment (320), and the second connecting segment (320) abuts against the third connecting segment (330); Alternatively, the second conductive element (300) is a torsion spring, the helical portion of which is installed in the second through hole (221), the first torsion arm of which is the third connecting segment (330), the second torsion arm of which is bent to form the second connecting segment (320) and the first connecting segment (310), and the end of the first connecting segment (310) elastically abuts against the fixed end (210).

7. The power supply structure of the residual current circuit breaker according to claim 5, characterized in that, The two inner walls of the clearance groove (222) are provided with second locking protrusions (223), and the second connecting section (320) is engaged between the two opposite second locking protrusions (223).

8. The power extraction structure of the residual current circuit breaker according to claim 5, characterized in that, The circuit breaker housing (13) includes a circuit breaker base (103) and a circuit breaker cover on the circuit breaker base (103). The circuit breaker base (103) is provided with a limiting groove (1031). The fixed end (210) is snapped into the limiting groove (1031). The circuit breaker cover is provided with a first through hole. The first through hole is opposite to the limiting groove (1031). The circuit breaker cover is attached to the leakage current module base (22).

9. The power supply structure of the residual current circuit breaker according to any one of claims 1-3, characterized in that, The handle (11) is rotatably mounted on the circuit breaker housing (13). On the inner wall of the circuit breaker housing (13), an arc-shaped baffle (132) is provided around the rotating base (101) of the handle (11). The arc-shaped baffle (132) is used to prevent the electric arc generated when the movable end (220) separates from the first conductive element (100) from being sprayed to the outside of the circuit breaker housing (13).

10. A residual current circuit breaker, characterized in that, The device includes a circuit breaker module (10), a leakage current module (20), and a power supply structure for a leakage current circuit breaker as described in any one of claims 1-9, wherein the power supply structure for the leakage current circuit breaker is disposed in the circuit breaker module (10).

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