Residual-current circuit breaker
By designing conductive components in the residual current circuit breaker to be electrically connected to the moving contact assembly, it is ensured that the circuit board is energized only after the moving contact and the stationary contact are engaged. This solves the problem of burnout caused by reverse wiring in existing residual current circuit breakers and achieves safety and flexibility with both forward and reverse wiring.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG CHINT ELECTRIC CO LTD
- Filing Date
- 2025-06-03
- Publication Date
- 2026-05-26
AI Technical Summary
Existing residual current circuit breakers pose a significant safety hazard, as the circuit board remains energized and burns out when wiring is incorrect. Furthermore, they only allow power to enter in one direction, which is a major limitation.
Design a residual current circuit breaker, including a circuit breaker module and a residual current module. The circuit board can only be energized after the moving contact and the stationary contact are engaged. The design of conductive parts and conductive lines ensures that the circuit is not energized at the same time regardless of whether the wiring is reversed. The conductive parts are electrically connected to the moving contact assembly. The conductive line design is simple and reliable.
It effectively avoids the risk of the circuit board being burned out due to continuous power supply caused by reverse wiring, improves wiring safety, and allows the residual current circuit breaker to be wired in both directions, solving the limitation of unidirectional incoming lines.
Smart Images
Figure CN224288194U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of circuit breaker technology, and in particular to a residual current circuit breaker. Background Technology
[0002] A residual current circuit breaker (RCCB) is an electrical device that protects against leakage current. When the leakage current of the device exceeds the operating current value of the RCCB, the RCCB will automatically disconnect, thus providing protection against leakage current and electric shock.
[0003] Existing residual current circuit breakers (RCCBs) typically draw power from the load side, with the non-powered side being the power supply side. The RCCB's circuit board is only energized when the moving and stationary contacts are engaged. If the RCCB is connected incorrectly, its circuit board will be directly powered by the mains supply. Even if the moving and stationary contacts are disconnected, the circuit board remains energized, which will quickly burn out, posing a significant safety hazard in the RCCB wiring.
[0004] Therefore, there is an urgent need to develop a residual current circuit breaker to solve the above-mentioned technical problems. Utility Model Content
[0005] This utility model provides a residual current circuit breaker that, regardless of whether the wiring is in the forward or reverse direction, the circuit board can only be energized after the moving contact and the stationary contact are engaged, effectively reducing the safety hazards of wiring residual current circuit breakers.
[0006] To achieve this objective, the present invention adopts the following technical solution:
[0007] Residual current circuit breakers include:
[0008] Circuit breaker modules, including three-phase circuit breakers;
[0009] The leakage current module includes a circuit board, a first power supply wire, a second power supply wire, and a third power supply wire. One end of each of the first, second, and third power supply wires is electrically connected to the circuit board. The other end of the first power supply wire is electrically connected to the input terminal of one phase of the circuit breaker. The other ends of the second and third power supply wires are respectively electrically connected to the output terminals of the other two phases of the circuit breaker.
[0010] Optionally, the circuit breaker and the leakage current module are arranged in sequence, and the other end of the first power-taking wire is electrically connected to the incoming terminal of the circuit breaker adjacent to the leakage current module.
[0011] Optionally, the circuit breaker includes a circuit breaker housing and a moving contact assembly disposed within the circuit breaker housing. The side wall of the circuit breaker housing near the leakage current module has a through hole opposite to the moving contact assembly. A first conductive element passes through the through hole. One end of the first conductive element located inside the circuit breaker housing is electrically connected to the moving contact assembly, and the other end of the first conductive element located outside the circuit breaker housing is connected to the first power supply wire.
[0012] Optionally, the first conductive element is an elastic element, one end of which is connected to the first power-taking wire, and the other end of which elastically abuts against the conductive plate of the moving contact assembly.
[0013] Optionally, the leakage current module further includes a leakage current module housing. The leakage current module housing is provided with a mounting part on the side near the circuit breaker or on the outside of the circuit breaker housing. A second conductive element is mounted on the mounting part. One end of the second conductive element is connected to the first power take-off wire, and the other end of the second conductive element is connected to the end of the first conductive element located outside the circuit breaker housing.
[0014] Optionally, the mounting part includes a connecting post disposed on the housing of the leakage current module or the housing of the circuit breaker, the second conductive element is a torsion spring, the helical part of the torsion spring is sleeved on the connecting post, the first torsion arm of the torsion spring is connected to the first power taking wire, and the second torsion arm of the torsion spring is connected to the end of the first conductive element located outside the housing of the circuit breaker.
[0015] Alternatively, the mounting part includes an elongated groove disposed on the housing of the leakage current module, the second conductive element is installed in the elongated groove, one end of the elongated groove is opposite to the through hole, and the part of the elongated groove opposite to the through hole is engaged with the end of the first conductive element located outside the housing of the circuit breaker.
[0016] Alternatively, the mounting part may include a buckle disposed on the housing of the leakage current module or the housing of the circuit breaker, the second conductive element being a conductive strip, the conductive strip being snapped into the buckle, one end of the conductive strip being connected to the first power-taking wire, and the other end of the conductive strip being connected to the end of the first conductive element located outside the housing of the circuit breaker.
[0017] Optionally, the first conductive element includes a connector and elastic clamping arms disposed on opposite sides of the connector. The two elastic clamping arms are elastically close to or far apart from each other. The two elastic clamping arms pass through the through hole and are clamped to the conductive plate of the moving contact assembly.
[0018] Optionally, at least one of the elastic clamping arms has a boss at its end, the boss being located on the plate surface of the two elastic clamping arms that are close to each other, and the boss elastically abutting against the conductive plate.
[0019] Optionally, the leakage current module further includes a leakage current module housing. The leakage current module housing is provided with a first slot and a second slot communicating with the first slot on the side near the circuit breaker or on the outer side of the circuit breaker housing. The first slot is disposed opposite to the through hole. One end of the first conductive member with the connector is engaged in the first slot, and one end of the first power taking wire connected to the first conductive member is engaged in the second slot.
[0020] Optionally, the residual current circuit breaker further includes a current transformer, through which the first power-taking conductor passes.
[0021] The beneficial effects of this utility model are:
[0022] This utility model provides a residual current circuit breaker, including a circuit breaker module and a residual current module. The residual current module includes a circuit board and a first power-taking conductor, a second power-taking conductor, and a third power-taking conductor, each with one end electrically connected to the circuit board. The other end of the first power-taking conductor is electrically connected to the input terminal of one phase circuit breaker, meaning that the first power-taking conductor draws power from the power supply side of this phase circuit breaker. The other ends of the second and third power-taking conductors are respectively electrically connected to the output terminals of the other two phase circuit breakers, meaning that the second and third power-taking conductors draw power from the load side of their respective circuit breakers. When the residual current circuit breaker (RCCB) is wired correctly (each phase's incoming terminal is connected to the power supply), the first power-taking conductor draws power directly from the power supply, while the second and third power-taking conductors can only draw power after the corresponding circuit breaker is closed. When the RCCB is wired incorrectly (each phase's outgoing terminal is connected to the power supply), the first power-taking conductor still needs to draw power after the corresponding circuit breaker is closed, while the second and third power-taking conductors draw power directly from the power supply. Therefore, when the RCCB trips (all three phases trip), regardless of whether the RCCB is wired correctly or incorrectly, the first, second, and third power-taking conductors cannot be energized simultaneously. Since the first, second, and third power-taking conductors cannot be energized simultaneously, the circuit board will not be powered, effectively avoiding the risk of the circuit board being burned out due to continuous power supply caused by the circuit breaker being wired incorrectly, thus improving the safety of the RCCB wiring. At the same time, it also allows the residual current circuit breaker to be connected in both directions, which solves the limitation faced by the unidirectional incoming line of the residual current circuit breaker in the existing technology. Attached Figure Description
[0023] 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.
[0024] Figure 1 This is a top view of the residual current circuit breaker provided in this embodiment of the utility model;
[0025] Figure 2 This is a circuit diagram illustrating the power supply of the leakage current module in the leakage current circuit breaker provided in this embodiment of the utility model.
[0026] Figure 3 This is a schematic diagram of the connection between the first power-taking wire and the circuit board provided in this embodiment of the utility model;
[0027] Figure 4 This is a schematic diagram of the circuit breaker adjacent to the leakage current module provided in this embodiment of the utility model;
[0028] Figure 5 This is a schematic diagram illustrating the cooperation between a first conductive element, a first power-taking wire, and a circuit breaker according to an embodiment of this utility model.
[0029] Figure 6 This is a schematic diagram of the connection between the first conductive element and the moving contact assembly provided in an embodiment of the present invention. Figure 1 ;
[0030] Figure 7 This is a schematic diagram of the connection between the first conductive element and the moving contact assembly provided in this utility model. Figure 2 (Circuit breaker casing is hidden);
[0031] Figure 8 This is a schematic diagram of another connection between the first conductive element and the first power-taking wire provided in this embodiment of the utility model;
[0032] Figure 9 for Figure 8 Enlarged view at point A;
[0033] Figure 10 A schematic diagram illustrating the interaction between another first conductive element and a circuit breaker provided in an embodiment of this utility model;
[0034] Figure 11 A schematic diagram illustrating the connection between the first conductive element and the moving contact assembly provided in an embodiment of this utility model;
[0035] Figure 12 This is a schematic diagram showing the interaction between the first conductive element and the housing of the leakage current module, as provided in another embodiment of this utility model.
[0036] In the picture:
[0037] 100. Circuit breaker module; 110. Circuit breaker; 111. Circuit breaker housing; 1111. Through hole; 112. Moving contact assembly; 1121. Conductive plate;
[0038] 200, Leakage current module; 210, Circuit board; 220, First power supply wire; 230, Second power supply wire; 240, Third power supply wire; 250, Leakage current module housing; 251, Connecting post; 252, First slot; 253, Second slot; 254, Long slot;
[0039] 300, First conductive element; 310, Connector; 320, Elastic clamping arm; 321, Boss;
[0040] 400. Second conductive component;
[0041] 500. Mutual transformer. Detailed Implementation
[0042] 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.
[0043] 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.
[0044] 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.
[0045] 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.
[0046] Example 1
[0047] This embodiment provides a residual current circuit breaker (RCCB) in which, regardless of whether the wiring is forward or reversed, the circuit board can only be energized after the moving contact and stationary contact are engaged, effectively reducing the safety hazards of RCCB wiring.
[0048] Specifically, such as Figures 1-3 As shown, the residual current circuit breaker includes a circuit breaker module 100 and a residual current module 200.
[0049] The circuit breaker module 100 includes a three-phase circuit breaker 110. The three-phase circuit breaker 110 generally corresponds to phases A, B, and C of a residual current circuit breaker. In one possible embodiment, the three-phase circuit breaker 110 is a three-phase four-wire circuit breaker.
[0050] The leakage current module 200 includes a circuit board 210, a first power supply wire 220, a second power supply wire 230, and a third power supply wire 240. One end of each of the three power supply wires is electrically connected to the circuit board 210. It is worth noting that the circuit board 210 can only be energized when current flows through all three power supply wires; that is, if there is no current in any one of the three power supply wires, the circuit board 210 will not be connected.
[0051] Furthermore, the other end of the first power-taking conductor 220 is electrically connected to the incoming terminal of one phase circuit breaker 110, meaning that the first power-taking conductor 220 draws power from the power supply side of this phase circuit breaker 110. The other ends of the second power-taking conductor 230 and the third power-taking conductor 240 are respectively electrically connected to the outgoing terminals of the other two phase circuit breakers 110, meaning that the second power-taking conductor 230 and the third power-taking conductor 240 draw power from the load side of the corresponding circuit breaker 110.
[0052] See also Figure 2 When the residual current circuit breaker is wired correctly (the incoming terminal of each phase circuit breaker 110 is connected to the power supply), the first power supply conductor 220 draws power directly from the power supply, while the second power supply conductor 230 and the third power supply conductor 240 require corresponding circuit breakers 110. Figure 2Power can only be drawn after the A-phase circuit breaker 110 and the B-phase circuit breaker 110 are closed. When the wiring of the residual current circuit breaker is reversed (the outgoing terminals of each phase circuit breaker 110 are connected to the power supply), the first power-drawing conductor 220 requires the corresponding circuit breaker 110. Figure 2 Power can only be drawn after the C-phase circuit breaker 110 is closed. The second power-drawing wire 230 and the third power-drawing wire 240 draw power directly from the power source.
[0053] Therefore, when the residual current circuit breaker (RCCB) trips (all three phases of circuit breaker 110 trip), regardless of whether the RCCB is connected in the correct or reverse direction, the first power supply conductor 220, the second power supply conductor 230, and the third power supply conductor 240 cannot be energized simultaneously. Since these conductors cannot be energized simultaneously, circuit board 210 will not be powered. This effectively avoids the risk of circuit board 210 being burned out due to continuous power supply caused by the reverse connection of circuit breaker 110, thus improving the safety of the RCCB wiring. Simultaneously, it also allows the RCCB to be connected in both the correct and reverse directions, overcoming the limitations of unidirectional incoming lines in existing RCCB technologies.
[0054] Further, see also Figure 2 In one possible embodiment, the residual current circuit breaker further includes a current transformer 500, through which a first power-taking conductor 220 passes. Since the first power-taking conductor 220 draws power from the incoming terminal (also called the upper terminal) of the circuit breaker 110, it diverts a portion of the current from that phase of the circuit breaker 110. If the first power-taking conductor 220 does not pass through the current transformer 500, it can easily lead to an imbalance in the three-phase circuit breaker 110, potentially causing tripping. Therefore, the first power-taking conductor 220 passes through the current transformer 500 to improve the balance of the three-phase circuit breaker 110 and reduce the risk of tripping.
[0055] Furthermore, in order to keep the wiring arrangement in the residual current circuit breaker as simple as possible, the other end of the first power supply wire 220 is electrically connected to the incoming terminal of the circuit breaker 110 adjacent to the residual current module 200.
[0056] Further, see also Figure 4 and Figure 5 In one possible embodiment, the circuit breaker 110 includes a circuit breaker housing 111 and a moving contact assembly 112 disposed within the circuit breaker housing 111. The side wall of the circuit breaker housing 111 near the residual current module 200 has a through hole 1111 opposite to the moving contact assembly 112. It is worth noting that in this residual current circuit breaker, the moving contact assembly 112 is electrically connected to the incoming line, meaning the moving contact assembly 112 is directly powered by a power source.
[0057] Furthermore, a first conductive element 300 is installed inside the through hole 1111. One end of the first conductive element 300, which is located inside the circuit breaker housing 111, is electrically connected to the moving contact assembly 112, and the other end of the first conductive element 300, which is located outside the circuit breaker housing 111, is connected to the first power supply wire 220.
[0058] That is, the first conductive element 300 serves as a bridge for the electrical connection between the first power-taking wire 220 and the moving contact assembly 112, enabling the first power-taking wire 220 to draw power from the moving contact assembly 112. Since the moving contact assembly 112 is electrically connected to the incoming terminal of the residual current circuit breaker, this connection method achieves the electrical connection between the first power-taking wire 220 and the incoming terminal of the phase circuit breaker 110. Furthermore, by providing a through hole 1111 on the circuit breaker housing 111, the first conductive element 300 can directly pass through the through hole 1111 and be electrically connected to the moving contact assembly 112. This simplifies the structure, helps to shorten the length of the first conductive element 300, and facilitates assembly.
[0059] It is worth noting that, since the first conductive element 300 needs to be electrically connected to the moving contact assembly 112, the moving contact assembly 112 refers to the part that can conduct current, including the moving contact, conductive rod, conductive support, arc-starting structure, etc. Because the moving contact needs to move during operation, if the first conductive element 300 is electrically connected to the moving contact, the moving contact needs to move to engage with the stationary contact before it contacts the first conductive element 300.
[0060] Optionally, the first conductive element 300 and the through hole 1111 can be configured to have a clearance fit, so that the first conductive element 300 is not easily moved within the through hole 1111, thereby improving the reliability of the installation of the first conductive element 300.
[0061] Optionally, the through hole 1111 can be a circular hole, a square hole, or other shapes, which can be adapted to the shape of the first conductive element 300. This application does not make specific limitations.
[0062] Furthermore, such as Figure 6 As shown, in one possible embodiment, the first conductive element 300 is an elastic element. One end of the elastic element is connected to the first power-taking wire 220, and the other end of the elastic element elastically abuts against the conductive plate 1121 of the moving contact assembly 112. This configuration establishes a contact electrical connection between the other end of the elastic element and the conductive plate 1121, simplifying the connection structure, facilitating assembly, and improving the reliability of the electrical connection between the elastic element and the conductive plate 1121 through the elastic force of the elastic element.
[0063] It is worth noting that the conductive plate 1121 can be a bimetallic plate, a terminal block, or an arc-starting plate on a bimetallic component connected to the moving contact in the moving contact assembly 112. The appropriate option can be selected based on actual needs. In this embodiment, the conductive plate 1121 is an arc-starting plate on a bimetallic component.
[0064] Optionally, the elastic element and the first power-taking conductor 220 can be connected by welding. The welding process is simple, easy to process, and has high connection strength, with a low risk of electrical connection failure.
[0065] Optionally, in this embodiment, the elastic element is a spring. In other embodiments, the elastic element may also be a sheet. Of course, the structure of the elastic element can also be set in other ways, depending on actual needs, and this application does not impose specific limitations.
[0066] Furthermore, the leakage current module 200 also includes a leakage current module housing 250. The leakage current module housing 250 has a mounting portion on the side near the circuit breaker 110 or on the outside of the circuit breaker housing 111. A second conductive element 400 is mounted on the mounting portion. One end of the second conductive element 400 is connected to the first power-taking wire 220, and the other end of the second conductive element 400 is connected to the end of the first conductive element 300 located outside the circuit breaker housing 111. That is, the second conductive element 400 serves as a bridge to achieve electrical connection between the first conductive element 300 and the first power-taking wire 220. This arrangement helps to shorten the length of the first power-taking wire 220. In addition, fixing the second conductive element 400 through the mounting portion improves the installation stability of the second conductive element 400.
[0067] Optionally, such as Figure 5 and Figure 7 As shown, in one possible embodiment, the mounting portion includes a connecting post 251 disposed on the leakage current module housing 250 or the circuit breaker housing 111. The second conductive element 400 is a torsion spring, with its helical portion sleeved on the connecting post 251. The first torsion arm of the torsion spring is connected to the first power-taking wire 220, and the second torsion arm of the torsion spring is connected to the end of the first conductive element 300 located outside the circuit breaker housing 111. The structure of this mounting portion and the second conductive element 400 is relatively simple and easy to assemble.
[0068] Optionally, the first torsion arm and the first power-taking wire 220, as well as the second torsion arm and the first conductive element 300, can be connected by welding. The welding process is simple, easy to process, and has high connection strength, with a low risk of electrical connection failure.
[0069] Alternatively, in another possible embodiment, the mounting part includes a buckle disposed on the leakage current module housing 250 or the circuit breaker housing 111, and the second conductive member 400 is a conductive strip that engages with the buckle. One end of the conductive strip is connected to the first power-taking wire 220, and the other end of the conductive strip is connected to the end of the first conductive member 300 located outside the circuit breaker housing 111. This mounting part and the second conductive member 400 have a relatively simple structure and are easy to assemble.
[0070] Optionally, the conductive strip and the first power-taking wire 220, as well as the conductive strip and the first conductive component 300, can be connected by welding. The welding process is simple, easy to process, and has high connection strength, with a low risk of electrical connection failure.
[0071] Optionally, see [link to relevant documentation] Figure 7 In other possible embodiments, the mounting part includes an elongated groove 254 disposed on the housing 250 of the leakage current module. The second conductive element 400 is installed in the elongated groove 254, one end of the elongated groove 254 is opposite to the through hole 1111, and the part of the elongated groove 254 opposite to the through hole 1111 is engaged with the end of the first conductive element 300 located outside the circuit breaker housing 111. The elongated groove 254 can fix both the second conductive element 400 and the first conductive element 300, which is convenient for processing and assembly.
[0072] It is understandable that when the second conductive element 400 is a torsion spring, the connecting post 251 can be set in the long slot 254.
[0073] Of course, in other possible embodiments, the structures of the second conductive element 400 and the mounting portion can also be configured differently, depending on actual needs, and this application does not impose specific limitations. It is understood that the structure of the mounting portion should be adapted to the structural features of the second conductive element 400.
[0074] Example 2
[0075] This embodiment provides a residual current circuit breaker, which has a largely the same structure as Embodiment 1, with improvements only. Therefore, only the differences between the two are described here, and the structures identical to those in Embodiment 1 will not be repeated. In this embodiment, the same or corresponding technical features as in Embodiment 1 are referred to by the same reference numerals.
[0076] Specifically, such as Figures 8-11 As shown, in this embodiment, the first conductive element 300 includes a connector 310 and elastic clamping arms 320 disposed on opposite sides of the connector 310. The two elastic clamping arms 320 can elastically move closer or further apart. The two elastic clamping arms 320 pass through the through hole 1111 and clamp onto the conductive plate 1121 of the moving contact assembly 112. This first conductive element 300 is a conductive clamp structure. The first conductive element 300 is electrically connected to the conductive plate 1121 by clamping, which is simple in structure and easy to assemble. Furthermore, the two elastic clamping arms 320 can reliably clamp onto both sides of the conductive plate 1121 by elastic force, improving the reliability of the electrical connection between the first conductive element 300 and the conductive plate 1121.
[0077] Optionally, see [link to relevant documentation] Figure 9 In one possible embodiment, the first power-taking wire 220 is connected to one of the elastic clamps 320.
[0078] Optionally, see [link to relevant documentation] Figure 9 At least one elastic clamping arm 320 has a boss 321 at its end. The boss 321 is located on the plate surface where the two elastic clamping arms 320 are close to each other, and the boss 321 elastically abuts against the conductive plate 1121. By providing the boss 321, it is beneficial to improve the clamping force between the two elastic clamping arms 320, thereby improving the reliability of the first conductive member 300 being clamped in the conductive plate 1121.
[0079] See also Figure 9 In this embodiment, one of the elastic clamping arms 320 is provided with a boss 321.
[0080] Optionally, see [link to relevant documentation] Figure 9 The connector 310 and the two elastic clamping arms 320 form an integrated structure, which is easy to process and has high structural reliability.
[0081] Furthermore, such as Figure 12 As shown, the leakage current module 200 also includes a leakage current module housing 250. A first slot 252 and a second slot 253 communicating with the first slot 252 are provided on the side of the leakage current module housing 250 near the circuit breaker 110 or on the outer side of the circuit breaker housing 111. The first slot 252 is positioned opposite to the through hole 1111. One end of the first conductive member 300 with a connector 310 is engaged in the first slot 252, and the end of the first power-taking wire 220 connected to the first conductive member 300 is engaged in the second slot 253. By fixing the first conductive member 300 and part of the first power-taking wire 220 using the first slot 252 and the second slot 253, the neatness of the internal wiring of the leakage current circuit breaker can be improved.
[0082] 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. An electrical leakage circuit breaker, characterized in that include: Circuit breaker module (100), including three-phase circuit breaker (110); The leakage current module (200) includes a circuit board (210), a first power supply wire (220), a second power supply wire (230), and a third power supply wire (240). One end of the first power supply wire (220), the second power supply wire (230), and the third power supply wire (240) are all electrically connected to the circuit board (210). The other end of the first power supply wire (220) is electrically connected to the input terminal of one phase of the circuit breaker (110). The other ends of the second power supply wire (230) and the third power supply wire (240) are respectively electrically connected to the output terminals of the other two phases of the circuit breaker (110).
2. The ground fault circuit interrupter of claim 1, wherein, The circuit breaker (110) and the leakage current module (200) are arranged in sequence, and the other end of the first power taking conductor (220) is electrically connected to the incoming terminal of the circuit breaker (110) adjacent to the leakage current module (200).
3. The ground fault circuit interrupter of claim 2, wherein, The circuit breaker (110) includes a circuit breaker housing (111) and a moving contact assembly (112) disposed inside the circuit breaker housing (111). The side wall of the circuit breaker housing (111) near the leakage current module (200) is provided with a through hole (1111) opposite to the moving contact assembly (112). A first conductive element (300) is disposed inside the through hole (1111). One end of the first conductive element (300) inside the circuit breaker housing (111) is electrically connected to the moving contact assembly (112), and the other end of the first conductive element (300) outside the circuit breaker housing (111) is connected to the first power supply wire (220).
4. The ground fault circuit interrupter of claim 3, wherein, The first conductive element (300) is an elastic element. One end of the elastic element is connected to the first power-taking wire (220), and the other end of the elastic element elastically abuts against the conductive plate (1121) of the moving contact assembly (112).
5. The ground fault circuit interrupter of claim 3 or 4, wherein, The leakage current module (200) also includes a leakage current module housing (250). The leakage current module housing (250) has a mounting part on the side near the circuit breaker (110) or on the outside of the circuit breaker housing (111). A second conductive element (400) is mounted on the mounting part. One end of the second conductive element (400) is connected to the first power take-off wire (220), and the other end of the second conductive element (400) is connected to the end of the first conductive element (300) located outside the circuit breaker housing (111).
6. The ground fault circuit interrupter of claim 5, wherein, The mounting part includes a connecting post (251) disposed on the housing (250) of the leakage current module or the housing (111) of the circuit breaker. The second conductive element (400) is a torsion spring. The helical part of the torsion spring is sleeved on the connecting post (251). The first torsion arm of the torsion spring is connected to the first power taking wire (220). The second torsion arm of the torsion spring is connected to the end of the first conductive element (300) located outside the housing (111) of the circuit breaker. Alternatively, the mounting part includes an elongated groove (254) disposed on the housing (250) of the leakage current module, the second conductive element (400) is installed in the elongated groove (254), one end of the elongated groove (254) is opposite to the through hole (1111), and the part of the elongated groove (254) opposite to the through hole (1111) is engaged with one end of the first conductive element (300) located outside the circuit breaker housing (111); Alternatively, the mounting part may include a buckle disposed on the housing (250) of the leakage current module or the housing (111) of the circuit breaker, wherein the second conductive element (400) is a conductive strip, the conductive strip is snapped into the buckle, one end of the conductive strip is connected to the first power take-off wire (220), and the other end of the conductive strip is connected to the end of the first conductive element (300) located outside the housing (111) of the circuit breaker.
7. The ground fault circuit interrupter of claim 3, wherein, The first conductive element (300) includes a connector (310) and elastic clamping arms (320) disposed on opposite sides of the connector (310). The two elastic clamping arms (320) can elastically move closer or further apart. The two elastic clamping arms (320) pass through the through hole (1111) and are clamped to the conductive plate (1121) of the moving contact assembly (112).
8. The ground fault circuit interrupter of claim 7, wherein, At least one of the elastic clamping arms (320) has a boss (321) at its end. The boss (321) is located on the plate surface where the two elastic clamping arms (320) are close to each other, and the boss (321) elastically abuts against the conductive plate (1121).
9. The ground fault circuit interrupter of claim 7 or 8, wherein, The leakage current module (200) also includes a leakage current module housing (250). The leakage current module housing (250) is provided with a first slot (252) and a second slot (253) communicating with the first slot (252) on the side of the leakage current module housing (250) near the circuit breaker (110) or on the outer side of the circuit breaker housing (111). The first slot (252) is arranged opposite to the through hole (1111). One end of the first conductive member (300) with the connector (310) is snapped into the first slot (252). One end of the first power taking wire (220) connected to the first conductive member (300) is snapped into the second slot (253).
10. The ground fault circuit interrupter of claim 1, wherein, The residual current circuit breaker also includes a current transformer (500), and the first power take-off conductor (220) passes through the current transformer (500).