A leakage circuit breaker

Abstract

The invention provides a leakage circuit breaker, which relates to the technical field of circuit breakers. The invention comprises a shell, an L-phase pole structure and an N-phase pole structure. A first cavity and a second cavity for arranging the L-phase pole structure and the N-phase pole structure are arranged in the shell. The L-phase pole structure comprises an operating mechanism and an L-pole linkage mechanism. The N-phase pole structure comprises an N-pole static contact, an N-pole moving contact, an N-pole linkage mechanism and a leakage protection mechanism. The invention not only has remarkable opening and closing effects, but also has leakage protection function. At the same time, an integral structure is adopted, and the L-phase pole structure and the N-phase pole structure are arranged independently. The structure is compact and the layout is reasonable, which can save space, can be beneficial to increase the cross-sectional area of ​​current-carrying parts, install larger wiring terminals, so that the circuit breaker has better current-carrying capacity and heat dissipation capacity, can increase the rated current level of the circuit breaker, is beneficial to improve the breaking capacity, and can also install larger screws to increase the torque, ensure the structural firmness, and extend the service life.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit breakers, and in particular to a leakage circuit breaker. Background Art

[0002] At present, 1P+N leakage circuit breakers are generally divided into two structures: assembled and integrated. The assembled 1P+N leakage circuit breaker is assembled from an independent 1P circuit breaker and an independent leakage release unit. The assembled leakage circuit breaker is larger in size and wider than the two-pole circuit breaker (the width is greater than two modules, i.e., greater than 36mm), and its N pole is usually not openable. Another type of integrated 1P+N leakage circuit breaker is to combine the 1P circuit breaker and the leakage release unit together and arrange them in one module. The product width is equal to the width of the two-pole circuit breaker. Although it has a smaller product volume, due to its internal structure layout is not compact enough, its internal space is limited, and only smaller specifications of terminal blocks can be installed. Therefore, the rated current of this integrated 1P+N leakage circuit breaker can basically only reach 32A or 40A, and its breaking capacity index does not meet the requirements, and its wiring capacity is low, which is prone to the risk of screw damage. Summary of the invention

[0003] The purpose of the present invention is to provide a leakage circuit breaker to solve the technical problems of the existing leakage circuit breakers in the prior art, such as the poor rated current and breaking capacity; the preferred technical scheme among the many technical schemes provided by the present invention can produce many technical effects; see the following description for details.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A leakage circuit breaker provided by the present invention comprises a shell, an L-phase pole structure and an N-phase pole structure, wherein: a first cavity and a second cavity are arranged in the shell, and the L-phase pole structure and the N-phase pole structure are arranged in the first cavity and the second cavity respectively; the L-phase pole structure comprises an operating mechanism and an L-pole linkage mechanism connected to the operating mechanism, the N-phase pole structure comprises an N-pole static contact, an N-pole moving contact and an N-pole linkage mechanism connected to the N-pole moving contact, the N-pole linkage mechanism is connected to the L-pole linkage mechanism, and the operating mechanism can drive the N-pole moving contact to contact or disengage with the N-pole static contact through the L-pole linkage mechanism and the N-pole linkage mechanism; the N-phase pole structure comprises a leakage protection mechanism, the leakage protection mechanism is connected to the operating mechanism, and the leakage protection mechanism can drive the operating mechanism to operate.

[0006] Preferably, the outer shell includes a first side shell, a second side shell and a middle shell, and the middle shell includes an upper shell and a lower shell, wherein: the first side shell and the second side shell are relatively detachably arranged on both sides of the upper shell; the lower shell is located below the upper shell, and the two sides are respectively detachably connected to the first side shell and the second side shell; the first side shell, the upper shell and the lower shell form the first cavity, and the second side shell, the upper shell and the lower shell form the second cavity.

[0007] Preferably, the L-pole linkage mechanism includes a linkage shaft, and the N-pole linkage mechanism includes a connecting rod, wherein: one end of the linkage shaft is connected to the operating mechanism, the other end of the linkage shaft is inserted into the second cavity and connected to the connecting end of the connecting rod, and the driving end of the connecting rod is connected to the N-pole moving contact.

[0008] Preferably, a limiting guide boss and a limiting block are provided in the shell, wherein: the driving end of the connecting rod abuts against the limiting guide boss and can move along the limiting guide boss; a first abutting position is provided on the limiting guide boss, and when the driving end of the connecting rod moves to the first abutting position, the N-pole moving contact contacts the N-pole static contact; a second abutting position is provided on the limiting guide boss, and when the connecting rod abuts against the limiting block, the driving end of the connecting rod moves to the second abutting position, and the N-pole moving contact is separated from the N-pole static contact.

[0009] Preferably, the N-phase pole structure comprises an arc-striking piece, and the arc-striking piece is arranged opposite to the N-pole static contact, and an arc-striking channel is formed between the arc-striking piece and the N-pole static contact.

[0010] Preferably, the leakage protection mechanism includes a leakage sensing component, a leakage tripping component and a leakage action component, wherein: the leakage sensing component, the leakage tripping component and the leakage action component are all arranged in the second cavity; the leakage sensing component is used for leakage sensing; the leakage tripping component is connected to the operating mechanism through the leakage action component.

[0011] Preferably, the leakage sensing component comprises a zero-sequence current transformer and an electronic component board, and the electronic component board is arranged below the zero-sequence current transformer.

[0012] Preferably, the leakage trip assembly includes a coil, an iron core and a first spring, wherein: the coil is electrically connected to the electronic component board; the iron core is arranged in the coil, the movable end of the iron core extends out of the coil and is connected to the leakage action assembly; the first spring is sleeved on the connecting end of the iron core and abuts against the outer shell.

[0013] Preferably, the leakage action component includes a push rod, a second spring and a reset button, wherein: the push rod can be rotatably mounted on the housing, the reset button is slidably arranged on the housing, and the two ends of the second spring are respectively abutted against the housing and the reset button; the push rod is provided with a connecting portion, and the movable end of the iron core is connected to the connecting portion; the push rod is provided with a lap portion, and the lap portion is overlapped with the reset button; the connecting rod is provided with a yield groove, the push rod is provided with a rocker arm, the rocker arm passes through the yield groove, and is connected to a trip rod, the trip rod is inserted into the first cavity, and is connected to the operating mechanism.

[0014] Preferably, the leakage protection mechanism includes a leakage test component, which includes a test button, a third spring, a first conductive spring sheet and a second conductive spring sheet, wherein: the test button is slidably arranged on the housing; the two ends of the third spring are respectively abutted against the housing and the test button; the first conductive spring sheet and the second conductive spring sheet are both electrically connected to the electronic component board, and the test button is abutted against the first conductive spring sheet; by pressing the test button, the first conductive spring sheet can contact the second conductive spring sheet to form a simulated leakage current.

[0015] The leakage circuit breaker provided by the present invention has at least the following beneficial effects:

[0016] The leakage circuit breaker comprises a shell, an L-phase pole structure and an N-phase pole structure. A first cavity and a second cavity are arranged in the shell. The L-phase pole structure and the N-phase pole structure are arranged in the first cavity and the second cavity respectively. An integral structure is adopted, and the L-phase pole structure and the N-phase pole structure are independently arranged in two major parts. The structural layout is reasonable and compact, which can save more space, can be conducive to increasing the cross-sectional area of ​​the current-carrying parts and arranging larger-sized terminal blocks, can effectively improve the current-carrying capacity and heat dissipation capacity of the circuit breaker, increase the rated current level of the circuit breaker, and is conducive to improving the breaking capacity. At the same time, larger-sized screws can effectively increase the torque, ensure the structural firmness, and extend the service life.

[0017] The L-phase pole structure includes an operating mechanism and an L-pole linkage mechanism connected to the operating mechanism; the N-phase pole structure includes an N-pole static contact, an N-pole moving contact and an N-pole linkage mechanism connected to the N-pole moving contact; the N-pole linkage mechanism is connected to the L-pole linkage mechanism; in actual use, the operating mechanism is manipulated to drive the N-pole moving contact to contact or separate from the N-pole static contact through the L-pole linkage mechanism and the N-pole linkage mechanism, thereby achieving closing and opening, and the closing and opening effects are significant.

[0018] The N-phase pole structure includes a leakage protection mechanism, which is connected to the operating mechanism. In actual use, when leakage occurs, the leakage protection mechanism is triggered and the operating mechanism is activated to unlock it, thereby achieving the tripping of the circuit breaker. The leakage protection effect is significant. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of the structure of the present invention;

[0021] Figure 2 It is a structural schematic diagram of the housing of the present invention;

[0022] Figure 3 It is a schematic diagram of the structure of the shell in the present invention;

[0023] Figure 4 is a schematic diagram of the L-phase pole structure of the present invention;

[0024] Figure 5 is a schematic diagram of the N-phase pole structure of the present invention;

[0025] Figure 6 Schematic diagram of the N-phase pole structure in the closed state of the present invention;

[0026] Figure 7 It is a schematic diagram of the N-phase pole structure of the leakage tripping of the present invention;

[0027] Figure 8 It is a structural schematic diagram of the connecting rod of the present invention;

[0028] Fig. 9 It is a schematic structural diagram of a push rod of the present invention.

[0029] Reference numerals

[0030] 1. Shell; 11. First side shell; 12. Second side shell; 13. Middle shell; 131. Upper shell; 1311. Limit guide boss; 1312. Limit block; 1313. Make way hole; 132. Lower shell; 2. L phase pole structure; 21. Operating mechanism; 22. L pole linkage mechanism; 3. N phase pole structure; 31. N pole static contact; 32. N pole moving contact; 33. N pole linkage mechanism; 331. Make way slot; 34. Arc-starting sheet; 35. Leakage sensing component; 351. Zero sequence current transformer; 3 52. Electronic component board; 36. Leakage trip assembly; 361. Coil; 362. Iron core; 363. First spring; 37. Leakage action assembly; 371. Push rod; 3711. Mounting portion; 3712. Connecting portion; 3713. Overlap portion; 3714. Rocker arm; 3715. Trip rod; 372. Reset button; 373. Second spring; 38. Leakage test assembly; 381. Test button; 382. Third spring; 383. First conductive spring sheet; 384. Second conductive spring sheet. DETAILED DESCRIPTION

[0031] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0032] Embodiment 1:

[0033] The present invention provides a leakage circuit breaker, referring to Figure 1-Figure 5 As shown, the leakage circuit breaker includes a housing 1 , an L-phase pole structure 2 and an N-phase pole structure 3 .

[0034] A first cavity and a second cavity are disposed in the housing 1 , and an L-phase pole structure 2 and an N-phase pole structure 3 are disposed in the first cavity and the second cavity respectively.

[0035] The L-phase pole structure 2 includes an operating mechanism 21 and an L-pole linkage mechanism 22 connected to the operating mechanism 21 , and the N-phase pole structure 3 includes an N-pole static contact 31 , an N-pole moving contact 32 and an N-pole linkage mechanism 33 connected to the N-pole moving contact 32 , and the N-pole linkage mechanism 33 is connected to the L-pole linkage mechanism 22 .

[0036] The N-phase pole structure 3 includes a leakage protection mechanism, which is connected to the operating mechanism 21 .

[0037] When closing or opening the switch, the user pushes the handle, and the handle drives the operating mechanism 21 to move. The L-pole linkage mechanism 22 and the N-pole linkage mechanism 33 transmit power to the N-pole moving contact 32, so that the N-pole moving contact 32 contacts or separates from the N-pole static contact 31.

[0038] During leakage protection, the leakage protection mechanism senses that the leakage current reaches the action value, and at this time the leakage protection mechanism drives the operating mechanism 21 to act, thereby tripping the circuit breaker.

[0039] The present invention is a 1P+N type circuit breaker, which adopts an integral structure and is divided into two major parts, namely an L-phase pole structure 2 and an N-phase pole structure 3, which are arranged independently. Such an arrangement has a compact structure and a reasonable layout, can save more space, can be beneficial to increasing the cross-sectional area of ​​current-carrying parts and installing larger-sized wiring terminals, etc. On the one hand, the circuit breaker can have better current-carrying capacity and heat dissipation capacity, and increase the rated current level of the circuit breaker. On the other hand, it can be beneficial to improve the breaking capacity. At the same time, larger-sized screws can effectively increase the torque, ensure the structural firmness, and extend the service life.

[0040] Through the cooperation between the L-pole linkage mechanism 22 and the N-pole linkage mechanism 33, the power of the operating mechanism 21 can be effectively transmitted to the N-pole moving contact 32, thereby realizing closing and opening, and the closing and opening effects are remarkable.

[0041] Through the leakage protection mechanism, when the leakage current is sensed to reach the action value, the operating mechanism 21 can be driven to operate, thereby tripping the circuit breaker, and the leakage protection effect is significant.

[0042] Embodiment 2:

[0043] Example 2 is based on Example 1

[0044] like Figure 2 As shown, the housing 1 includes a first side shell 11 , a second side shell 12 and a middle shell 13 , and the middle shell 13 includes an upper shell 131 and a lower shell 132 .

[0045] The first side shell 11 and the second side shell 12 are relatively detachably arranged on both sides of the upper shell 131, and the lower shell 132 is located below the upper shell 131, and the two sides are detachably connected to the first side shell 11 and the second side shell 12 respectively, and connecting holes are arranged at corresponding positions on the first side shell 11, the second side shell 12, the upper shell 131 and the lower shell 132, and the detachable connection is achieved by threaded fasteners, the structure is firm, and the disassembly and assembly are convenient.

[0046] The first side shell 11 , the upper shell 131 and the lower shell 132 form the first cavity.

[0047] The second side shell 12 , the upper shell 131 and the lower shell 132 form the second cavity.

[0048] The overall width of the housing 1 is two modules, namely 36 mm, and the two independent cavities formed by the housing 1 correspond to the reasonable layout of the L-phase pole structure 2 and the N-phase pole structure 3.

[0049] As an optional implementation, Figure 4 and Figure 5 As shown, the L-pole linkage mechanism 22 includes a linkage shaft, the N-pole linkage mechanism 33 includes a connecting rod, and a clearance hole 1313 for the linkage shaft to move is provided on the upper shell 131.

[0050] One end of the linkage shaft is connected to the operating mechanism 21 , and the other end of the linkage shaft is inserted into the second cavity and connected to the connecting end of the connecting rod. The driving end of the connecting rod is connected to the N-pole moving contact 32 .

[0051] The linkage shaft and the connecting rod form a connecting rod structure, which has a simple structure and a significant transmission effect.

[0052] like Figure 8 As shown, the connecting end of the connecting rod is provided with a first connecting hole for connecting the linkage shaft, the outer wall of the driving end of the connecting rod is provided with a mounting groove, the groove wall of the mounting groove is provided with a second connecting hole, and the mounting groove with the second connecting hole is used to connect the N-pole moving contact 32.

[0053] As an optional implementation, Figure 3 and Figure 5 As shown, a limiting guide boss 1311 and a limiting block 1312 are provided on the upper shell 131 , and the driving end of the connecting rod abuts against the limiting guide boss 1311 and can move along the limiting guide boss 1311 .

[0054] The limiting guide boss 1311 is provided with a first abutting position and a second abutting position.

[0055] like Figure 6 As shown, when the circuit breaker is closed, the operating mechanism 21 drives the linkage shaft to move, and the connecting rod moves accordingly. When the driving end of the connecting rod moves to the first abutment position, the N-pole moving contact 32 contacts the N-pole static contact 31, and the N-pole contact pressure and overtravel are maintained.

[0056] like Figure 7 As shown, when the leakage trip occurs, the leakage protection mechanism drives the operating mechanism 21 to operate. At this time, the linkage shaft and the connecting rod move accordingly. When the edge of the connecting rod abuts against the limit block 1312, the driving end of the connecting rod moves to the second abutment position, and the N-pole moving contact 32 is separated from the N-pole static contact 31, maintaining the N-pole contact opening distance.

[0057] As an optional implementation, Figure 5As shown, the N-phase pole structure 3 includes an arc-striking piece 34, which is arranged opposite to the N-pole static contact 31, forming an arc-striking channel between the arc-striking piece 34 and the N-pole static contact 31, and the arc-striking piece 34 and the N-pole moving contact 32 are both electrically connected to the N-pole terminal.

[0058] The arrangement of the arc-starting piece 34 can effectively guide the arc when the leakage circuit breaker is short-circuited and disconnected, so that the arc is quickly transferred and excessive ablation between contacts is avoided, making the use safer and more reliable.

[0059] As an optional implementation, Figure 5 As shown, the leakage protection mechanism includes a leakage sensing component 35, a leakage tripping component 36 and a leakage action component 37.

[0060] The leakage sensing component 35 , the leakage tripping component 36 and the leakage action component 37 are all arranged in the second cavity. The leakage sensing component 35 is used for leakage sensing, and the leakage tripping component 36 is connected to the operating mechanism 21 through the leakage action component 37 .

[0061] When leakage occurs, when the leakage current sensed by the leakage sensing component 35 reaches the action value, the leakage tripping component 36 drives the operating mechanism 21 to operate through the leakage action component 37, thereby tripping the circuit breaker.

[0062] As an optional implementation, Figure 6 As shown, the leakage sensing component 35 includes a zero-sequence current transformer 351 and an electronic component board 352. The zero-sequence current transformer 351 is arranged in the middle position of the second cavity, and the phase line passes through the zero-sequence current transformer 351. The electronic component board 352 is arranged on the bottom side of the second cavity, and the electronic component board 352 is located below the zero-sequence current transformer 351.

[0063] As an optional implementation, Figure 7 As shown, the leakage trip assembly 36 includes a coil 361 , an iron core 362 and a first spring 363 .

[0064] The coil 361 is electrically connected to the electronic component board 352 , the iron core 362 is coaxially arranged in the coil 361 , the movable end of the iron core 362 extends out of the coil 361 and is connected to the leakage action component 37 , the first spring 363 is sleeved on the connecting end of the iron core 362 and abuts against the upper shell 131 .

[0065] As an optional implementation, Figure 6-Figure 9 As shown, the leakage action component 37 includes a push rod 371 , a second spring 373 and a reset button 372 .

[0066] The push rod 371 includes a rod body, which is provided with a fixing hole along the axial direction, and the fixing hole is the mounting portion 3711 of the push rod 371. The outer wall of the rod body is connected with a block body, and one side edge of the block body is provided with a plug-in groove, and the plug-in groove forms a connecting portion 3712 of the push rod 371. The other side edge of the block body is connected with a lap protrusion, and the lap protrusion forms a lap portion 3713. The rod body is connected with a rocker arm 3714, and a trip rod 3715 is vertically connected to one end of the rocker arm 3714 away from the rod body.

[0067] The mounting portion 3711 of the push rod 371 can be rotatably mounted on the upper shell 131, the reset button 372 is slidably set on the upper shell 131, the two ends of the second spring 373 are respectively abutted against the upper shell 131 and the reset button 372, the movable end of the iron core 362 is inserted into the connecting portion 3712, and the overlapping portion 3713 is overlapped with the reset button 372.

[0068] like Figure 8 As shown, the connecting rod is provided with a clearance groove 331, and the rocker arm 3714 of the push rod 371 passes through the clearance groove 331. Figure 3 As shown, a clearance hole 1313 is provided on the upper shell 131 , and the tripping rod 3715 is inserted into the first cavity along the clearance hole 1313 and connected to the operating mechanism 21 .

[0069] As an optional implementation, the leakage protection mechanism includes a leakage test assembly 38 , and the leakage test assembly 38 includes a test button 381 , a third spring 382 , a first conductive spring piece 383 and a second conductive spring piece 384 .

[0070] The test button 381 is slidably set on the upper shell 131. The test button 381 includes an upper button body and a lower fixed column connected to the upper button body. The third spring 382 is sleeved on the lower fixed column, and both ends are respectively abutted against the test button 381. The first conductive spring sheet 383 and the second conductive spring sheet 384 are both electrically connected to the electronic component board 352. The test button 381 abuts against the first conductive spring sheet 383 to form a leakage test circuit.

[0071] When the test button 381 is pressed, the first conductive spring piece 383 contacts the second conductive spring piece 384 , and the leakage test circuit is connected to generate a simulated leakage current.

[0072] When the test button 381 is released, the test button 381 is reset under the elastic force of the third spring 382 , and the first conductive spring piece 383 and the second conductive spring piece 384 are separated.

[0073] The action process of the leakage circuit breaker of the present invention is as follows:

[0074] Closing and opening process:

[0075] The user controls the closing of the switch, and the handle drives the operating mechanism 21 to move, and the linkage shaft and the connecting rod move accordingly, driving the N-pole moving contact 32 to move and contact with the N-pole static contact 31. The N-pole moving contact 32 closes before the L-pole. At this time, the driving end of the connecting rod moves to the first abutment position of the limit guide boss 1311, so that the closing state is stable and reliable.

[0076] The user controls the opening of the switch, and the handle drives the operating mechanism 21 to move, and the linkage shaft and the connecting rod move accordingly, driving the N-pole moving contact 32 to move and separate from the N-pole static contact 31. The N-pole moving contact 32 is then separated from the L-phase pole. At this time, the driving end of the connecting rod moves to the second abutment position of the limit guide boss 1311, and the connecting rod abuts against the limit block 1312 to maintain the opening distance of the N-pole contacts, so that the opening state is stable and reliable.

[0077] Leakage tripping process:

[0078] When leakage occurs in the circuit, the zero-sequence current transformer 351 senses that the leakage current has reached the action value, and the electronic component board 352 generates an excitation signal to activate the leakage trip component 36, and the iron core 362 is attracted to drive the push rod 371 to rotate. The rocker arm 3714 and the trip rod 3715 of the push rod 371 drive the operating mechanism 21 to unlock, so that the leakage circuit breaker is tripped.

[0079] At the same time, the overlap portion 3713 of the push rod 371 is separated from the reset button 372 , and the reset button 372 is bounced up by the second spring 373 . The iron core 362 makes the push rod 371 abut against the reset button 372 under the action of the first spring 363 .

[0080] Leakage test process:

[0081] When the test button 381 is pressed, the test button 381 pushes the first conductive spring piece 383 to contact the second conductive spring piece 384. At this time, the leakage test circuit is connected to form a simulated leakage signal. After the zero-sequence current transformer 351 senses the leakage current, the electronic component board 352 generates an excitation signal to activate the leakage trip component 36.

[0082] When the test button 381 is released, the test button 381 returns to its original position under the action of the third spring 382 , and the first conductive spring piece 383 is separated from the second conductive spring piece 384 .

[0083] Reset process of leakage trip assembly 36:

[0084] When the reset button 372 is pressed, under the action of the first spring 363, the iron core 362 drives the push rod 371 to rotate, so that the overlapping portion 3713 of the push rod 371 overlaps and locks with the reset button 372, and at the same time, the rocker arm 3714 and the trip rod 3715 of the push rod 371 return to their original positions, and the leakage circuit breaker can be closed normally.

[0085] In the description of the present application, it should be understood that the terms "upper", "lower", "inside", "outside", "top", "bottom", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0086] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, "multiple" or "several" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0087] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0088] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A leakage circuit breaker, characterized in that: It includes a shell, an L-phase pole structure and an N-phase pole structure, wherein: A first cavity and a second cavity are provided in the shell, and the L-phase pole structure and the N-phase pole structure are respectively provided in the first cavity and the second cavity; The L-phase pole structure includes an operating mechanism and an L-pole linkage mechanism connected to the operating mechanism, and the N-phase pole structure includes an N-pole static contact, an N-pole moving contact, and an N-pole linkage mechanism connected to the N-pole moving contact, the N-pole linkage mechanism is connected to the L-pole linkage mechanism, and the operating mechanism can drive the N-pole moving contact to contact or disengage with the N-pole static contact through the L-pole linkage mechanism and the N-pole linkage mechanism; The N-phase pole structure includes a leakage protection mechanism, which is connected to the operating mechanism and can drive the operating mechanism to operate; the N-pole linkage mechanism includes a connecting rod, and the driving end of the connecting rod is connected to the N-pole moving contact; A limit guide boss and a limit block are arranged in the housing, wherein: the driving end of the connecting rod abuts against the limit guide boss and can move along the limit guide boss; a first abutment position is arranged on the limit guide boss, and when the driving end of the connecting rod moves to the first abutment position, the N-pole moving contact contacts the N-pole static contact; a second abutment position is arranged on the limit guide boss, and when the connecting rod abuts against the limit block, the driving end of the connecting rod moves to the second abutment position, and the N-pole moving contact separates from the N-pole static contact; The leakage protection mechanism comprises a leakage sensing component, a leakage tripping component and a leakage action component, wherein: the leakage sensing component, the leakage tripping component and the leakage action component are all arranged in the second cavity; the leakage sensing component is used for leakage sensing; the leakage tripping component is connected to the operating mechanism through the leakage action component; The leakage action assembly includes a push rod, a second spring and a reset button, wherein: the push rod can be rotatably mounted on the housing, the reset button is slidably arranged on the housing, and the two ends of the second spring are respectively in contact with the housing and the reset button; the push rod is provided with a connecting portion, and the movable end of the iron core of the leakage trip assembly is connected to the connecting portion; the push rod is provided with a lap portion, and the lap portion is overlapped with the reset button; the connecting rod is provided with a yielding groove, the push rod is provided with a rocker arm, the rocker arm passes through the yielding groove, and is connected with a tripping rod, the tripping rod is inserted into the first cavity, and is connected with the operating mechanism; The push rod comprises a rod body, an outer wall of the rod body is connected with a block body, a side edge of the block body is provided with an inserting groove, and the inserting groove forms a connecting portion of the push rod.

2. The residual current circuit breaker according to claim 1, characterized in that: The outer shell comprises a first side shell, a second side shell and a middle shell, and the middle shell comprises an upper shell and a lower shell, wherein: The first side shell and the second side shell are relatively detachably arranged on two sides of the upper shell; The lower shell is located below the upper shell, and two sides thereof are detachably connected to the first side shell and the second side shell respectively; The first side shell, the upper shell and the lower shell form the first cavity, and the second side shell, the upper shell and the lower shell form the second cavity.

3. The residual current circuit breaker according to claim 1, characterized in that: The L-pole linkage mechanism comprises a linkage shaft, wherein: One end of the linkage shaft is connected to the operating mechanism, and the other end of the linkage shaft is inserted into the second cavity and connected to the connecting end of the connecting rod.

4. The residual current circuit breaker according to claim 1, characterized in that: The N-phase pole structure comprises an arc-striking piece, and the arc-striking piece is arranged opposite to the N-pole static contact, and an arc-striking channel is formed between the arc-striking piece and the N-pole static contact.

5. The residual current circuit breaker according to claim 3, characterized in that: The leakage current sensing component includes a zero-sequence current transformer and an electronic component board, and the electronic component board is arranged below the zero-sequence current transformer.

6. The residual current circuit breaker according to claim 5, characterized in that: The leakage trip assembly comprises a coil, an iron core and a first spring, wherein: The coil is electrically connected to the electronic component board; The iron core is arranged in the coil, and the movable end of the iron core extends out of the coil and is connected to the leakage action component; The first spring is sleeved on the connecting end of the iron core and abuts against the housing.

7. The residual current circuit breaker according to claim 5, characterized in that: The leakage protection mechanism includes a leakage test assembly, and the leakage test assembly includes a test button, a third spring, a first conductive spring sheet, and a second conductive spring sheet, wherein: The test button is slidably arranged on the housing; Two ends of the third spring are respectively in contact with the housing and the test button; The first conductive spring piece and the second conductive spring piece are both electrically connected to the electronic component board, and the test button abuts against the first conductive spring piece; By pressing the test button, the first conductive spring piece can contact the second conductive spring piece to form a simulated leakage current.

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