Residual current operated circuit breaker

Abstract

The utility model belongs to the technical field of low-voltage electric appliances, and discloses a residual current operated circuit breaker, which comprises a circuit breaker module and a release module, the circuit breaker module comprises a circuit breaker, the release module comprises a mutual inductor assembly, the mutual inductor assembly comprises a mutual inductor shell and a current-carrying component, the current-carrying component is arranged in the mutual inductor shell, and the current-carrying component is arranged in the mutual inductor shell. The current-carrying component is provided with a first contact part, a wire outlet contact plate is arranged at a wire outlet end of a circuit breaker shell of the circuit breaker, the mutual inductor shell is provided with a pressing rod, and when the mutual inductor shell is connected with the circuit breaker shell, the pressing rod can press the first contact part of the current-carrying component against the wire outlet contact plate, so that the mutual inductor assembly is electrically connected with the circuit breaker; when the residual current operated circuit breaker needs to be disassembled, only the mutual inductor shell and the circuit breaker shell need to be separated, the first contact part and the outgoing line contact plate can be separated, disassembly and assembly are convenient, the structure is simple, and the occupied space is small.

Description

Technical Field

[0001] The utility model relates to the technical field of low-voltage electrical appliances, in particular to a residual current operated circuit breaker. Background Art

[0002] A residual current operated circuit breaker is a low-voltage electrical appliance that includes overcurrent protection, short-circuit protection and residual current protection, which can protect electrical equipment and personal safety.

[0003] At present, there are two types of structures for residual current operated circuit breakers: modular assembly and integrated assembly. The existing integrated assembly structure is relatively small in size but not easy to disassemble. The existing modular assembly structure includes a circuit breaker module and a release module. The outlet end of the circuit breaker module is provided with a U-shaped conductive clip. The first contact portion of the current-carrying component in the release module is inserted between the two clamping arms of the conductive clip to realize rapid disassembly and assembly of the circuit breaker module and the release module. However, the structure is relatively complex and has a large size.

[0004] Therefore, a residual current operated circuit breaker is needed to solve the above problems. Utility Model Content

[0005] The utility model aims to provide a residual current operated circuit breaker, which realizes the rapid disassembly and assembly of the circuit breaker module and the release module, and has a simple structure and small occupied space.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A residual current operated circuit breaker comprises a circuit breaker module and a release module, wherein the circuit breaker module comprises a circuit breaker, the circuit breaker comprises a circuit breaker housing, the release module comprises a transformer assembly, the transformer assembly comprises a transformer housing and a current-carrying component, the current-carrying component is arranged in the transformer housing, the current-carrying component is provided with a first contact portion, the circuit breaker housing is provided with an outlet terminal, the outlet terminal is provided with an outlet contact plate, the transformer housing is provided with a pressing rod, the transformer housing and the circuit breaker housing are detachably connected, and the first contact portion is pressed against the outlet contact plate through the pressing rod.

[0008] As an optional solution, the outlet terminal is provided with a support portion, and the outlet contact plate is supported on the support portion.

[0009] As an optional solution, the end surface of the support portion abutting against the outlet contact plate is set as a first inclined surface, the first inclined surface gradually inclines downward from the inside of the circuit breaker housing to the outside, the end surface of the pressure rod abutting against the first contact portion is set as a second inclined surface matching the first inclined surface, and the first contact portion and the outlet contact plate are clamped between the first inclined surface and the second inclined surface.

[0010] As an optional solution, the transformer housing includes a main housing and an upper housing, the main housing is detachably connected to the circuit breaker housing, the current-carrying component is arranged in the main housing, and the upper housing is provided with the pressure rod and connected to the main housing.

[0011] As an optional scheme, the upper shell includes an intermediate plate and a plug-in plate arranged at both ends of the intermediate plate along the second direction, the intermediate plate is fixedly connected to the main shell, each of the plug-in plates is respectively provided with a first plug-in portion and a second plug-in portion extending along a third direction, the first plug-in portion and the second plug-in portion on each of the plug-in plates are spaced apart along the first direction, and both sides of the main shell along the second direction are provided with a third plug-in portion extending along the third direction, the tripper module also includes a tripping assembly, the tripping assembly includes a tripping shell, the tripping shell is connected to one side of the circuit breaker shell in the second direction, the tripping shell and the side of the circuit breaker shell facing the transformer shell are provided with a fourth plug-in portion extending along the third direction, the first plug-in portion is plug-matched with the third plug-in portion, and the second plug-in portion is plug-matched with the fourth plug-in portion.

[0012] As an optional solution, the upper shell and the main shell are connected by screws.

[0013] As an optional solution, the circuit breaker module includes three circuit breakers arranged along the second direction, and the transformer housing is provided with three pressure rods corresponding to the circuit breakers at intervals along the second direction.

[0014] As an optional scheme, the current-carrying component includes a partition and a first conductive member, a second conductive member and a third conductive member arranged on the partition at intervals along the second direction, and the first conductive member, the second conductive member and the third conductive member are all provided with the first contact portion which respectively abuts against the output contact plates of the three circuit breakers.

[0015] As an optional solution, the partition is respectively provided with a first groove and a third groove at both ends along the second direction, and a second groove is provided at the upper end of the partition, the first conductive component is limited to be located in the first groove, the second conductive component is limited to be located in the second groove, and the third conductive component is limited to be located in the third groove.

[0016] As an optional scheme, the transformer assembly also includes a transformer and a soft connecting wire, the current-carrying component and the soft connecting wire are both inserted into the transformer, the first conductive member, the second conductive member and the third conductive member are also each provided with a second contact portion, the second contact portion and one end of the soft connecting wire are respectively connected to the corresponding wiring terminals of the transformer assembly, and the other end of the soft connecting wire is connected to the corresponding incoming terminal of the circuit breaker module.

[0017] Beneficial effects of the utility model:

[0018] The utility model provides a residual current operated circuit breaker, wherein an outlet contact plate is arranged at the outlet end of the circuit breaker housing, and a pressing rod is arranged on the transformer housing. When the transformer housing is connected with the circuit breaker housing, the pressing rod can press the first contact portion of the current-carrying component against the outlet contact plate to realize the electrical connection between the transformer assembly and the circuit breaker. When the residual current operated circuit breaker needs to be disassembled, it is only necessary to separate the transformer housing from the circuit breaker housing, and the first contact portion and the outlet contact plate can be separated. The utility model has the advantages of convenient disassembly and assembly, simple structure and small space occupation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a residual current operated circuit breaker provided by an embodiment of the utility model;

[0020] Figure 2 It is a structural schematic diagram of a circuit breaker involved in an embodiment of the utility model;

[0021] Figure 3 It is a structural schematic diagram of the residual current operated circuit breaker provided by the embodiment of the utility model without the upper housing and the middle housing;

[0022] Figure 4 It is a structural schematic diagram of the upper shell involved in the embodiment of the utility model;

[0023] Figure 5 is a cross-sectional view of a residual current operated circuit breaker provided by an embodiment of the utility model;

[0024] Figure 6 yes Figure 3 A magnified view of the structure at center A;

[0025] Figure 7 It is a structural schematic diagram of the mutual inductor assembly involved in the embodiment of the utility model without the mutual inductor housing;

[0026] Figure 8 It is a structural schematic diagram of the current-carrying component involved in the embodiment of the utility model;

[0027] Fig. 9 It is a schematic structural diagram of a partition involved in an embodiment of the utility model.

[0028] In the figure:

[0029] 1. Circuit breaker module; 11. Circuit breaker; 111. Circuit breaker housing; 1111. Support portion; 1112. Fourth plug-in portion; 112. Outlet contact plate; 113. Handle; 114. L-pole inlet terminal; 12. N-pole inlet terminal;

[0030] 2. Trip module; 21. Transformer assembly; 211. Transformer housing; 2111. Upper housing; 2111a. Pressing rod; 2111b. Middle plate; 2111c. Plug-in board; 2111d. First plug-in part; 2111e. Second plug-in part; 2112. Middle housing; 2113. Lower housing; 2113a. Third plug-in part; 212. Current-carrying component; 2121. Partition; 2121 a, first groove; 2121b, second groove; 2121c, third groove; 2122, first conductive member; 2123, second conductive member; 2124, third conductive member; 2125, first contact portion; 2126, second contact portion; 213, mutual inductor; 214, flexible connecting wire; 215, L-pole terminal; 216, N-pole terminal; 22, release assembly; 221, release housing. DETAILED DESCRIPTION

[0031] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar components or components having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0032] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection, it can be a mechanical connection or an electrical connection, it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In the description of the present utility model, unless otherwise clearly stipulated and limited, a first feature being "above" or "below" a second feature may include the first feature and the second feature being in direct contact, or may include the first feature and the second feature being in contact not directly but through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0034] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0035] like Figure 1-Figure 3 As shown, an embodiment of the utility model provides a residual current operated circuit breaker, including a circuit breaker module 1 and a release module 2.

[0036] The circuit breaker module 1 includes a circuit breaker 11, which includes a circuit breaker housing 111, a handle 113, an operating mechanism, a contact mechanism, an incoming terminal and an outgoing contact plate 112. The operating mechanism and the contact mechanism are both arranged in the circuit breaker housing 111. The handle 113 is rotatably arranged on the circuit breaker housing 111. The handle 113, the operating mechanism and the contact mechanism are linked and connected. The circuit breaker housing 111 is provided with an incoming terminal and an outgoing terminal. The incoming terminal is arranged at the incoming terminal, and the outgoing contact plate 112 is arranged at the outgoing terminal. The contact mechanism includes a static contact and a moving contact which are electrically connected to the incoming terminal and the outgoing terminal respectively. The operating handle 113 can realize the contact and separation of the moving contact and the static contact to realize the conduction and disconnection of the wiring terminal and the outgoing contact plate 112.

[0037] The trip module 2 includes a transformer assembly 21 and a trip assembly 22. The transformer assembly 21 is arranged on a side of the circuit breaker module 1 where the outlet terminal is arranged along a first direction (i.e., the X-axis). The trip assembly 22 is arranged on a side of the circuit breaker module 1 along a second direction (i.e., the Y-axis). The trip assembly 22 includes a trip housing 221. The trip housing 221 is detachably connected to the circuit breaker housing 111. The transformer assembly 21 is electrically connected to the circuit breaker 11. The trip assembly 22 is connected to the operating mechanism signal. When the transformer assembly 21 detects a fault signal, the trip assembly 22 drives the operating mechanism to operate according to the fault signal to realize the tripping and power-off of the circuit breaker 11.

[0038] The transformer assembly 21 includes a transformer housing 211, a current-carrying component 212 and a transformer 213. The transformer housing 211 is detachably connected to the circuit breaker housing 111, and a wiring terminal is provided on the transformer housing 211. The current-carrying component 212 is inserted into the transformer 213 and both are provided in the transformer housing 211. The first contact portion 2125 of the current-carrying component 212 is electrically connected to the outlet contact plate 112, and the second contact portion 2126 of the current-carrying component 212 is electrically connected to the wiring terminal.

[0039] Specifically, Figure 3-Figure 5 As shown, the transformer housing 211 is provided with a pressing rod 2111a. After the transformer housing 211 and the circuit breaker housing 111 are assembled and connected, the pressing rod 2111a presses the first contact portion 2125 on the outlet contact plate 112 to achieve a tight fit between the first contact portion 2125 and the outlet contact plate 112.

[0040] The residual current operated circuit breaker is provided with an outlet contact plate 112 at the outlet end of the circuit breaker housing 111, and a pressing rod 2111a is provided on the transformer housing 211. When the transformer housing 211 is fixedly connected to the circuit breaker housing 111, the pressing rod 2111a can press the first contact portion 2125 of the current-carrying component 212 against the outlet contact plate 112 to realize the electrical connection between the transformer assembly 21 and the circuit breaker 11. When the residual current operated circuit breaker needs to be disassembled, it is only necessary to separate the transformer housing 211 from the circuit breaker housing 111, and the first contact portion 2125 can be separated from the outlet contact plate 112. The assembly and disassembly is convenient, the structure is simple and the space occupied is small.

[0041] Optionally, refer to Figure 2 and Figure 4-Figure 5 The outgoing line end of the circuit breaker housing 111 is provided with a supporting portion 1111, and the outgoing line contact plate 112 is supported on the supporting portion 1111. When the pressing rod 2111a presses the first contact portion 2125 on the outgoing line contact plate 112, the supporting portion 1111 is used to provide a supporting force for the outgoing line contact plate 112 so that the first contact portion 2125 can be pressed firmly.

[0042] The end surface where the support portion 1111 abuts against the outlet contact plate 112 is a first inclined surface, and the first inclined surface gradually inclines downward from the inside of the circuit breaker housing 111 to the outside. The end surface where the pressing rod 2111a abuts against the first contact portion 2125 is set as a second inclined surface matching the first inclined surface, and the first contact portion 2125 and the outlet contact plate 112 are sandwiched between the first inclined surface and the second inclined surface. This structure makes installation more convenient, and the first contact portion 2125 is pressed more firmly.

[0043] Optionally, refer to Figure 1 Combined with Figure 3-Figure 6The transformer housing 211 includes a main housing and an upper housing 2111. The main housing includes a lower housing 2113 and a middle housing 2112. The lower housing 2113 is fixedly connected to the circuit breaker housing 111. The transformer 213, the current-carrying component 212 and the terminal block are all installed in the lower housing 2113. The middle housing 2112 is fixedly connected to the lower housing 2113. The upper housing 2111 is provided with a pressure rod 2111a and can be connected to the middle housing 2112.

[0044] In order to make the upper shell 2111 more convenient during installation, the upper shell 2111 includes an intermediate plate 2111b and plug-in plates 2111c arranged at both ends of the intermediate plate 2111b along the second direction, each plug-in plate 2111c is respectively provided with a first plug-in portion 2111d and a second plug-in portion 2111e on both sides along the first direction, and a third plug-in portion 2113a is provided on both sides of the lower shell 2113 along the second direction. Along the second direction, the circuit breaker housing 111 and the trip housing 221 located at the edge are provided with a fourth plug-in portion 1112, and the first plug-in portion 2111d, the second plug-in portion 2111e, the third plug-in portion 2113a and the fourth plug-in portion 1112 are all extended along the third direction (i.e., the Z axis). When the transformer assembly 21 is connected to the circuit breaker module 1, the lower After the housing 2113 is connected to the circuit breaker housing 111, the middle housing 2112 is fixedly connected to the lower housing 2113, and then the upper housing 2111 is inserted downwardly along the third direction between the circuit breaker housing 111 and the main housing, the middle plate 2111b of the upper housing 2111 is covered on the middle housing 2112, the first plug-in portion 2111d and the second plug-in portion 2111e on one side of the plug-in plate 2111c are respectively plugged with the third plug-in portion 2113a on one side of the lower housing 2113 and the fourth plug-in portion 1112 of the circuit breaker housing 111, and the first plug-in portion 2111d and the second plug-in portion 2111e on the other side of the plug-in plate 2111c are respectively plugged with the third plug-in portion 2113a on the other side of the lower housing 2113 and the fourth plug-in portion 1112 of the trip housing 221. The first direction, the second direction and the third direction are perpendicular to each other.

[0045] Furthermore, the upper shell 2111 and the lower shell 2113 are connected by self-tapping screws, the middle shell 2112 is clamped between the lower shell 2113 and the upper shell 2111, and the self-tapping screws simultaneously penetrate the middle shell 2112 to connect the lower shell 2113, the middle shell 2112 and the upper shell 2111.

[0046] In this embodiment, the residual current operated circuit breaker is a three-phase four-wire system, and the circuit breaker module 1 includes three circuit breakers 11, which are arranged along the second direction. Three pressing rods 2111a are arranged in the upper housing 2111 along the second direction at intervals, and the three pressing rods 2111a are respectively electrically connected to the outgoing line contact plates 112 of the three circuit breakers 11. The incoming line terminals of the three circuit breakers 11 are all L-pole incoming line terminals 114, and the incoming line end of the circuit breaker module 1 is also provided with an N-pole incoming line terminal 12, and the connection terminals of the transformer assembly 21 include three L-pole connection terminals 215 and one N-pole connection terminal 216.

[0047] like Figure 7-Figure 8 As shown, the current-carrying component 212 includes a partition 2121 and a first conductive member 2122, a second conductive member 2123 and a third conductive member 2124 which are spaced apart on the partition 2121 along a second direction. The first conductive member 2122, the second conductive member 2123 and the third conductive member 2124 are all provided with a first contact portion 2125. The first contact portion 2125 of the first conductive member 2122, the first contact portion 2125 of the second conductive member 2123 and the first contact portion 2125 of the third conductive member 2124 are electrically connected to the outgoing line contact plates 112 of the three circuit breakers 11, respectively.

[0048] The first conductive member 2122 , the second conductive member 2123 and the third conductive member 2124 are also provided with a second contact portion 2126 , and the second contact portion 2126 of the first conductive member 2122 , the second conductive member 2123 and the second contact portion 2126 of the third conductive member 2124 are electrically connected to the three L-pole terminals 215 , respectively.

[0049] The transformer assembly 21 also includes a flexible connecting wire 214. The flexible connecting wire 214 and the current-carrying component 212 are both inserted into the transformer 213. One end of the flexible connecting wire 214 is electrically connected to the N-pole terminal 216 of the transformer assembly 21, and the other end is connected to the N-pole incoming terminal 12 of the circuit breaker module 1. This structure makes the wiring of the flexible connecting wire 214 more reasonable and reduces the space occupied by the flexible connecting wire 214.

[0050] Furthermore, if Fig. 9 Combined with Figure 8As shown, a second groove 2121b is provided at the upper end of the partition 2121, and a first groove 2121a and a third groove 2121c are respectively provided at both ends of the partition 2121 along the second direction, the first conductive member 2122 is passed through the mutual inductor 213 and is limited in the first groove 2121a, the second conductive member 2123 is passed through the mutual inductor 213 and is limited in the second groove 2121b, and the third conductive member 2124 is passed through the mutual inductor 213 and is limited in the third groove 2121c. This structure further reduces the space occupied by the current-carrying component 212 and reduces the volume of the overall structure.

[0051] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A residual current operated circuit breaker, comprising a circuit breaker module (1) and a release module (2), wherein the circuit breaker module (1) comprises a circuit breaker (11), the circuit breaker (11) comprises a circuit breaker housing (111), the release module (2) comprises a transformer assembly (21), the transformer assembly (21) comprises a transformer housing (211) and a current-carrying component (212), the current-carrying component (212) is arranged in the transformer housing (211), and the current-carrying component (212) is provided with a first contact portion (2125), characterized in that: The circuit breaker housing (111) is provided with an outlet terminal, the outlet terminal is provided with an outlet contact plate (112), the transformer housing (211) is provided with a pressing rod (2111a), the transformer housing (211) and the circuit breaker housing (111) are detachably connected, and the first contact portion (2125) is pressed against the outlet contact plate (112) through the pressing rod (2111a).

2. The residual current operated circuit breaker according to claim 1, characterized in that: The outlet terminal is provided with a support portion (1111), and the outlet contact plate (112) is supported on the support portion (1111).

3. The residual current operated circuit breaker according to claim 2, characterized in that: The end surface of the support portion (1111) abutting against the outlet contact plate (112) is set as a first inclined surface, and the first inclined surface gradually inclines downward from the inside of the circuit breaker housing (111) to the outside, and the end surface of the pressure rod (2111a) abutting against the first contact portion (2125) is set as a second inclined surface matching the first inclined surface, and the first contact portion (2125) and the outlet contact plate (112) are sandwiched between the first inclined surface and the second inclined surface.

4. The residual current operated circuit breaker according to claim 1, characterized in that: The transformer housing (211) comprises a main housing and an upper housing (2111); the main housing is detachably connected to the circuit breaker housing (111); the current-carrying component (212) is arranged in the main housing; and the upper housing (2111) is provided with the pressing rod (2111a) and is connected to the main housing.

5. The residual current operated circuit breaker according to claim 4, characterized in that: The upper shell (2111) comprises an intermediate plate (2111b) and plug-in plates (2111c) arranged at both ends of the intermediate plate (2111b) along the second direction; the intermediate plate (2111b) is fixedly connected to the main shell; each of the plug-in plates (2111c) is respectively provided with a first plug-in portion (2111d) and a second plug-in portion (2111e) extending along a third direction; the first plug-in portion (2111d) and the second plug-in portion (2111e) on each of the plug-in plates (2111c) are arranged at intervals along the first direction; and the main shell is provided with third plug-in portions (2111d) extending along the third direction on both sides of the second direction. The trip module (2) further comprises a trip assembly (22), wherein the trip assembly (22) comprises a trip housing (221), wherein the trip housing (221) is connected to one side of the circuit breaker housing (111) in the second direction, wherein the trip housing (221) and the side of the circuit breaker housing (111) facing the transformer housing (211) are both provided with a fourth plug-in portion (1112) extending along the third direction, wherein the first plug-in portion (2111d) is plug-fitted with the third plug-in portion (2113a), and the second plug-in portion (2111e) is plug-fitted with the fourth plug-in portion (1112).

6. The residual current operated circuit breaker according to claim 4, characterized in that: The upper shell (2111) and the main shell are connected by screws.

7. The residual current operated circuit breaker according to claim 1, characterized in that: The circuit breaker module (1) comprises three circuit breakers (11) arranged along a second direction, and the transformer housing (211) is provided with three pressure rods (2111a) corresponding one to one with the circuit breakers (11) at intervals along the second direction.

8. The residual current operated circuit breaker according to claim 7, characterized in that: The current-carrying component (212) comprises a partition (2121) and a first conductive member (2122), a second conductive member (2123) and a third conductive member (2124) arranged on the partition (2121) at intervals along the second direction, wherein the first conductive member (2122), the second conductive member (2123) and the third conductive member (2124) are each provided with a first contact portion (2125) respectively abutting against the outgoing line contact plates (112) of the three circuit breakers (11).

9. The residual current operated circuit breaker according to claim 8, characterized in that: The partition (2121) is provided with a first groove (2121a) and a third groove (2121c) at two ends along the second direction, respectively; the upper end of the partition (2121) is provided with a second groove (2121b); the first conductive member (2122) is limited to be located in the first groove (2121a); ​​the second conductive member (2123) is limited to be located in the second groove (2121b); and the third conductive member (2124) is limited to be located in the third groove (2121c).

10. The residual current operated circuit breaker according to claim 8, characterized in that: The transformer assembly (21) further comprises a transformer (213) and a flexible connecting wire (214); the current-carrying component (212) and the flexible connecting wire (214) are both inserted into the transformer (213); the first conductive member (2122), the second conductive member (2123) and the third conductive member (2124) are also each provided with a second contact portion (2126); the second contact portion (2126) and one end of the flexible connecting wire (214) are respectively connected to corresponding wiring terminals of the transformer assembly (21); and the other end of the flexible connecting wire (214) is connected to a corresponding incoming terminal of the circuit breaker module (1).

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