A circuit breaker with a leakage protection function or a residual current protection function
By designing a structure in the circuit breaker that links the sliding indicator with the trip unit, an automatic return indicator function is achieved when the circuit is closed, solving the problem that the indicator cannot automatically return in the existing technology and improving the user's ease of operation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- ZHEJIANG JIUCE INTELLIGENT ELECTRIC CO LTD
- Filing Date
- 2023-03-06
- Publication Date
- 2026-07-21
AI Technical Summary
The indicator of existing circuit breakers with leakage current protection or residual current protection functions cannot automatically return to its original position when leakage occurs, requiring manual reset by the user, which is inconvenient.
A circuit breaker structure was designed in which an indicator slides in an indicator hole to present different states. The actuation part of the trip unit is linked with the trip lever. When the circuit breaker is closed, the L-pole operating mechanism drives the reset structure to drive the indicator to slide, thereby achieving automatic return to the original position.
When the circuit breaker is closed, the indicator can automatically return to the normal indicating state without the need for manual reset by the user, which meets the operational requirements of specific occasions.
Smart Images
Figure CN116153726B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of low-voltage electrical technology, and in particular to a terminal circuit breaker with leakage protection or residual current protection function. Background Technology
[0002] Existing circuit breakers with residual current protection (RCD) or leakage current protection functions often combine a trip unit, a lever, and an indicator. When the circuit is normal, the indicator engages with the lever, confining the indicator inside the circuit breaker housing. When a leakage occurs, the trip unit rotates the lever, breaking the engagement between the indicator and the lever. The indicator then ejects from the housing under the action of a reset element, thus indicating the leakage operation.
[0003] For example, patent CN203931980U uses the above principle. However, this patent has the following problem: when a leakage occurs, the indicator pops out of the housing to indicate the leakage. Without external force, the indicator cannot return to the housing. This means that when the circuit breaker is reopened, the indicator must be pressed down to ensure it will pop up again in the event of another leakage. This undoubtedly requires an extra action from the user (pressing down to reset the indicator). However, in some special circumstances, customers only want the indicator to automatically return to its original position after the circuit breaker is closed. The aforementioned structure requiring manual reset of the indicator would actually cause inconvenience for the customer. Summary of the Invention
[0004] In view of this, the purpose of this application is to overcome the shortcomings of the prior art and to provide a circuit breaker with leakage current protection function or residual current protection function, which can realize that the leakage current or residual current indication can automatically return to the original position when the circuit breaker is closed.
[0005] This application provides a circuit breaker with leakage current protection or residual current protection, comprising: a housing, and an L-pole space and a neutral pole space space disposed at intervals within the housing; an L-pole operating mechanism is disposed within the L-pole space, and a tripping module is disposed within the neutral pole space; wherein, the tripping module includes a trip unit, a trip lever, a reset structure, and an indicator; an indicator hole is provided on the housing, and the indicator is slidably disposed in or below the indicator hole, with the sliding direction parallel to the housing sidewall where the indicator hole is located, and different indication states are presented in the indicator hole by the sliding of the indicator; the actuating part of the trip unit is linked with the trip lever, and the trip lever is linked with the indicator; when leakage current or residual current occurs, the actuating part of the trip unit drives the trip lever to move, thereby driving the indicator to slide and present a fault indication; the indicator is linked with the L-pole operating mechanism through the reset structure; when the circuit breaker is closed, the L-pole operating mechanism drives the reset structure to move, thereby driving the indicator to slide and present a normal indication.
[0006] In some embodiments of this application, the reset structure includes a swing element, a reset element, and a transmission assembly. The swing element is rotatably mounted on the housing and is linked to the L-pole operating mechanism through the transmission assembly. The indicator is located within the movement trajectory of the swing element at least when the circuit breaker is in the open position. When the circuit breaker is closed, the swing element moves the indicator to drive the indicator through the reset structure. The reset element provides bias force to the swing element, driving the swing element back to its initial position after each time the indicator reaches the normal indicating position.
[0007] In some embodiments of this application, the transmission assembly includes a rotating component, a connecting rod, and a locking spring. The rotating component is rotatably mounted to the housing and is linked to the L-pole operating mechanism. A linkage groove is provided on the swing component. The first end of the connecting rod is connected to the rotating component, and the second end is located in the linkage groove. The linkage groove includes a locking groove and a sliding groove that are interconnected. The second end has two states in the linkage groove. The first state is that it is in the locking groove under the action of the locking spring to ensure that the rotating component and the swing component can achieve transmission. The second state is that after the indicator reaches the normal position, under the force of the rotating component, the second end squeezes the locking spring and enters the sliding groove. The distance that the second end moves in the sliding groove is sufficient to ensure that the swing component returns to the initial position.
[0008] In some embodiments of this application, the indicator is provided with a toggle groove, and the swinging member drives the indicator by toggle the groove wall; the length of the toggle groove is sufficient to ensure that the swinging member will not cause the indicator to slide in the opposite direction when returning to the initial position.
[0009] In some embodiments of this application, the transmission assembly includes a rotating component and a connecting rod. The rotating component is rotatably disposed with respect to the housing and is linked with the L-pole operating mechanism. The rotating component is connected to the swing component through the connecting rod, so that the rotating component pulls the swing component to rotate after rotating.
[0010] In some embodiments of this application, an N-pole operating mechanism is also included, which includes an N-pole contact support, an N-pole moving contact, and an N-pole stationary contact. The N-pole contact support and / or the N-pole moving contact constitute the rotating member.
[0011] In some embodiments of this application, the indicator is provided with a toggle block, which is located within the movement trajectory of the trip lever at least when the circuit breaker is in the closed position. When leakage current or residual current occurs, the trip lever moves the toggle block to drive the indicator.
[0012] In some embodiments of this application, at least one sliding side of the indicator is provided with an elastic foot, and the outer shell is provided with a guide surface, which is a curved surface that is high in the middle and low at both ends; when the indicator slides, the elastic foot always abuts against the guide surface, and the deformation of the elastic foot is the largest when it is located in the middle position of the guide surface; the two ends of the guide surface correspond to the fault indication and normal indication of the indicator, respectively.
[0013] In some embodiments of this application, the outer shell includes a top cover and a base, the top cover and the base cooperate to form the neutral polar space, a mounting block is provided in the base that is detachably engaged with the base, and both the top cover and the mounting block are provided with sliding grooves, the guide surface is provided in at least one sliding groove.
[0014] In some embodiments of this application, the outer casing includes a top cover and a base, which cooperate to form the neutral polar space. A mounting block that is detachably fitted with the base is provided inside the base. The mounting block has a clearance groove, which is used to reserve space for the movement of the actuator and the release lever.
[0015] In some embodiments of this application, the trip lever is provided with a linkage rod that passes through the L pole space. The linkage rod is located next to the latch of the L pole operating mechanism and is on the side of the latch closer to the short circuit protection trip device. When leakage or residual current occurs, the trip lever is rotated by the actuating part of the trip device so that the linkage rod pushes the latch to unlock.
[0016] Compared with the prior art, the beneficial effects of this application are as follows: This application proposes a circuit breaker with leakage current protection or residual current protection function, which includes: a housing, and an L-pole space and a neutral pole space arranged at intervals inside the housing; an L-pole operating mechanism is arranged in the L-pole space, and a tripping module is arranged in the neutral pole space; wherein, the tripping module includes a trip unit, a tripping lever, a reset structure, and an indicator; an indicator hole is opened on the housing, and the indicator is slidably arranged in or below the indicator hole, with the sliding direction parallel to the housing side wall where the indicator hole is located, so that different indication states are presented in the indicator hole by the sliding of the indicator; the actuating part of the trip unit is linked with the tripping lever, and the tripping lever is linked with the indicator; when leakage current or residual current occurs, the actuating part of the trip unit drives the tripping lever to move, thereby driving the indicator to slide and present a fault indication; the indicator is linked with the L-pole operating mechanism through the reset structure; when the circuit breaker is closed, the L-pole operating mechanism drives the reset structure to move, thereby driving the indicator to slide and present a normal indication.
[0017] With the above structure, when the circuit breaker is closed, if leakage current or residual current occurs, the actuating part of the trip unit drives the trip lever to move, thereby driving the indicator to slide and causing the indicator to display a fault indication. When the circuit breaker needs to be closed, the L-pole operating mechanism drives the reset structure to move, thereby driving the indicator to slide and causing the indicator to display a normal indication. Compared with the existing indicator structure, this indicator structure can automatically return to the normal indication position when the circuit breaker is closed, without the need for manual reset of the indicator, which can meet the needs of some specific situations. Attached Figure Description
[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 An exploded schematic diagram of a circuit breaker provided in some embodiments of this application is shown; Figure 2 This application shows a schematic diagram of the L-pole space of a circuit breaker provided in some embodiments; Figure 3 This application shows a schematic diagram of the N-pole space of a circuit breaker provided in some embodiments; Figure 4 A partial cross-sectional view of the indicator, top cover, and mounting block of a circuit breaker provided in some embodiments of this application is shown. Figure 5This application shows a schematic diagram of the structure of the mounting block of a circuit breaker provided in some embodiments; Figure 6 This application provides schematic diagrams illustrating the movement of circuit breaker indicators according to some embodiments. Figure 7 A schematic diagram of the indicator structure of a circuit breaker provided in some embodiments of this application is shown. Detailed Implementation
[0020] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.
[0021] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, 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, and therefore should not be construed as a limitation of this application.
[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.
[0023] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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 application according to the specific circumstances.
[0024] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature. Example
[0025] like Figure 1-7 As shown, an embodiment of this application provides a residual current circuit breaker, specifically a two-pole circuit breaker, wherein one pole is the L pole and the other pole is the neutral pole, comprising: The outer casing contains an L-polar space 1 and a neutral polar space 2 spaced apart. Specifically, the outer casing includes an upper cover 2a, a base 2b, and a bottom cover 2c. The upper cover 2a and the base 2b mate to form the neutral polar space 2, and the base 2b and the bottom cover 2c mate to form the L-polar space 1. The upper cover 2a, the base 2b, and the bottom cover 2c are riveted together, thereby forming a mating connection between the upper cover 2a and the base 2b, and between the base 2b and the bottom cover 2c.
[0026] The L-pole space 1 is equipped with an L-pole operating mechanism 11, a short-circuit protection trip unit 112, inlet and outlet terminals, a thermal trip protector, etc. The L-pole operating mechanism 11 includes a handle, a U-shaped rod, an L-pole contact support, a trip latch, a latch 111, an L-pole moving contact, an L-pole stationary contact, etc. The working principles of these structures are all existing technologies and will not be described in detail here.
[0027] A tripping module 21 is provided within the neutral polarity space 2, including a trip unit 211, a trip lever 212, a reset structure, an indicator 213, a zero-sequence current transformer 218, and a circuit board 219. When the zero-sequence current transformer 218 detects leakage current, the actuating part of the trip unit 211 and the trip lever 212 provide feedback to the circuit board 219. The circuit board 219 can control the trip unit 211 to operate, causing the actuating part of the trip unit 211 to move, thereby driving the trip lever 212 to trip the circuit breaker. This principle of leakage current tripping is common knowledge in the field, so further details will not be elaborated upon.
[0028] An indicator hole 22 is provided on the top wall of the upper cover 2a. An indicator 213 is located below the indicator hole 22 and is slidably disposed with the upper cover 2a and the base 2b. The sliding direction is parallel to the top wall of the upper cover 2a. In this way, different indicator states can be presented by sliding the indicator 213. There are many ways to present different indicator states. For example, different colors can appear in the indicator hole as the position of the indicator changes to represent different states of the circuit breaker. Alternatively, different letters can appear in the indicator hole as the position of the indicator changes to represent different states of the circuit breaker. Or, the position of the indicator alone can represent different states of the circuit breaker. In this embodiment, different colors appear in the indicator hole as the position of the indicator changes to represent different states of the circuit breaker.
[0029] The indicator 213 is linked to the L-pole operating mechanism 11 via a reset structure. When the circuit breaker is closed (the L-pole operating mechanism 11 moves from the open position to the closed position), the L-pole operating mechanism 11 can drive the reset structure to move, thereby driving the indicator 213 to slide and present a normal indication. The aforementioned reset structure includes a swing member 214, a reset member 217, and a transmission assembly. The swing member 214 is rotatably mounted on the base 2b and is linked to the L-pole operating mechanism via the transmission assembly. The swing member 214 is provided with a toggle part 2141, and the indicator 213 is provided with a toggle groove 213a. The groove wall of the toggle groove 213a is within the movement trajectory of the toggle part 2141 at least when the circuit breaker is in the open position. Thus, when the circuit breaker needs to be closed, the toggle part 2141 can abut against the toggle groove 213a, thereby toggle the indicator 213 to slide to the normal indication position. Here, the reset element 217 is a torsion spring, which is sleeved at the rotation center of the swing element 214. One end engages with the slot on the swing element 214, and the other end engages with the outer casing. The restoring force of the reset element 217 ensures that the indicator 213 can return to its initial position after reaching the normal indicating position each time. The length of the toggle slot 213a is sufficient to ensure that the swing element 214 will not cause the indicator 213 to slide in the opposite direction during the process of returning to the initial position. That is to say, after the indicator 213 reaches the normal indicating position, the swing element 214 will not touch the indicator 213 during the return process under the action of the reset element 217. The aforementioned transmission component includes a rotating element 215, a connecting rod 216, and a locking spring 220. The rotating element 215 is rotatably connected to the outer casing via a shaft, and the rotating element 215 is linked with the L-pole operating mechanism. The rotating component 215 can be connected to the swing component 214 via a connecting rod 216. Specifically, a linkage groove is provided on the swing component 214. The first end of the connecting rod 216 is connected to the rotating component 215, and the second end 216a is located within the linkage groove. This linkage groove includes a locking groove 221 and a sliding groove 222 that are interconnected. The sliding groove 222 is arc-shaped and parallel to the rotation direction of the swing component 214. One end of the locking spring 220 abuts against the outer casing, and the other end is connected to the second end 216a. The second end 216a has two states within the linkage groove: In the first state, the second end 216a is positioned within the locking groove 221 under the action of the locking spring 220 to ensure transmission between the rotating component 215 and the swing component 214. In the second state, after the indicator 213 reaches the normal position, under the force of the rotating member 215, the second end 216a squeezes the locking spring 220 and enters the sliding groove 222. The distance that the second end 216a moves in the sliding groove 222 is sufficient to ensure that the swing member 214 returns to the initial position.The movement of the aforementioned indicator 213 from the fault indication position to the normal indication position is as follows: When the indicator 213 is in the fault indication position, the L-pole operating mechanism is in the open state, and the swing member 214 is in the initial position. As the L-pole operating mechanism rotates clockwise, the rotating member 215 also rotates clockwise. At this time, the second end 216a is in the second state (that is, it is held in the locking groove 221 by the locking spring 220). The rotating member 215, the connecting rod 216, and the swing member 214 are linked together. As the rotating member 215 drives the swing member 214 to rotate, When the actuating part 2141 of the swing member 214 rotates, it pushes the indicator 213 to move until the indicator 213 moves to the closing indicator position (normal indicator position). During this process, the reset member 217 will store energy. When the indicator 213 is in the normal indicator position, the swing member 214 will be resisted and will no longer rotate. At this time, the force of the connecting rod 216 will act on the locking spring 220 in large quantities, causing the second end 216a to enter the sliding groove 222. At this time, the force balance of the swing member 214 is broken, and it will return to the initial position under the action of the reset member 217.
[0030] Regarding the transition of indicator 213 from normal indication to fault indication, indicator 213 is linked to trip lever 212, which in turn is linked to trip unit 211. When leakage or residual current occurs, the actuating part of trip unit 211 drives trip lever 212 to move, thereby driving indicator 213 to slide and display fault indication. The linkage between the indicator 213 and the trip lever 212 is specifically implemented as follows: a downward-facing toggle block 2131 is provided on the indicator 213, and the trip lever 212 has a matching structure. As long as the toggle block 2131 is within the movement trajectory of the trip lever 212 at least when the circuit breaker is in the closed position, the trip lever 212 can drive the indicator 213 to move when leakage current or residual current occurs, until the indicator 213 moves to the fault indication position. Then the trip lever 212 will return to its original position through its own return spring (this technology of the trip lever 212 returning to its original position through its own return spring is well-known and will not be described in detail).
[0031] In this embodiment, since an N-pole operating mechanism is provided in the neutral pole space 2, the N-pole contact support or the N-pole moving contact in the N-pole operating mechanism can be set as the aforementioned rotating member 215. In this way, it is not necessary to add an additional rotating member 215. As for the linkage setting between the N-pole operating mechanism and the L-pole operating mechanism, it is already known technology and will not be described in detail.
[0032] In this embodiment, the indicator 213 has elastic feet 213b on both sliding sides, and a mounting block 24 is provided inside the base 2b. The upper cover 2a and the mounting block 24 are provided with sliding grooves 25a and 25b for interaction between the indicator 213 and the indicator. The bottom of the grooves 25a and 25b is a guide surface 23, which is a curved surface that is high in the middle and low at both ends. The elastic feet 213b always abut against the guide surface 23. During the sliding process of the indicator 213, the elastic feet 213b will deform. The deformation of the elastic feet 213b is the largest when it is in the middle position of the curved surface. When it passes the middle position of the curved surface, the elastic feet 213b will also generate a certain elastic force to accelerate the elastic feet 213b (indicator 213) to move to the adjacent two end positions 23a and 23b. The two end positions 23a and 23b correspond to the fault indication position and the normal indication position of the indicator. The middle position of the curved surface corresponds to a certain position of the indicator 213 between the fault indication position and the normal indication position. The optimal choice is to correspond exactly to the middle position between the fault indication position and the normal indication position. In this embodiment, the mounting block 24 and the base 2b are separate structures, but they can also be made into a single structure. This design facilitates the accelerated movement of the indicator 213 under the action of the elastic foot 213b (it has a certain acceleration effect after passing the middle position of the curved surface). At the same time, the elastic foot 213b also has a slight locking effect when it is in the side position, preventing inaccurate indication due to slight shaking of the circuit breaker.
[0033] In this embodiment, the mounting block 24 is provided with clearance grooves 26a and 26b. The clearance groove 26a is used to reserve space for the movement of the actuator, while the clearance groove 26b is used to reserve space for the movement of the release lever 212.
[0034] In this embodiment, a linkage rod 2121 is provided on the trip lever 212. The linkage rod 2121 penetrates the base 2b and enters the L-polar space 1. The linkage rod 2121 is located next to the latch 111 and on the side of the latch 111 closer to the short-circuit protection trip unit 112. When leakage or residual current occurs, the linkage rod 2121 (moving with the trip lever 212) pushes the latch 111 to unlock. In this embodiment, the linkage rod 2121 and the trip lever 212 are integrated, but a separate structure can also be used.
[0035] Although this embodiment only illustrates a residual current circuit breaker, the above structure can also be applied to residual current circuit breakers, arc fault circuit breakers with residual current protection or residual current protection functions, or reclosing circuit breakers with residual current protection or residual current protection functions. Similarly, the above embodiment only illustrates a 2-pole circuit breaker, but it can also be applied to 3-pole and 4-pole circuit breakers.
[0036] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0037] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.
Claims
1. A circuit breaker with leakage current protection or residual current protection function, comprising: The outer casing has an L-polar space (1) and a neutral polar space (2) spaced apart. An L-polar operating mechanism (11) is provided in the L-polar space (1), and a tripping module (21) is provided in the neutral polar space (2). The features are as follows: the tripping module (21) includes a tripping device (211), a tripping lever (212), a reset structure, and an indicator (213); an indicator hole (22) is provided on the outer casing, and the indicator (213) is slidably disposed in or below the indicator hole (22), with the sliding direction parallel to the side wall of the outer casing where the indicator hole is located, and different indication states are presented in the indicator hole (22) by the sliding of the indicator (213); the actuating part of the tripping device (211) and the tripping lever (212) are connected to the trigger mechanism (213). 212) Linkage: The trip lever (212) is linked with the indicator (213). When leakage or residual current occurs, the trip lever (212) is driven to move through the actuation part of the trip unit (211), thereby driving the indicator (213) to slide and present a fault indication. The indicator (213) is linked with the L-pole operating mechanism (11) through the reset structure. When the circuit breaker is closed, the reset structure is driven to move through the L-pole operating mechanism (11), thereby driving the indicator (213) to slide and present a normal indication. At least one sliding side of the indicator (213) is provided with an elastic foot (213b), and the outer shell is provided with a guide surface (23), which is a curved surface that is high in the middle and low at both ends. When the indicator (213) slides, the elastic foot (213b) always abuts against the guide surface (23), and the deformation of the elastic foot (213b) is the largest when it is located in the middle position of the guide surface (23). The two ends of the guide surface (23a, 23b) correspond to the fault indication and normal indication of the indicator (213), respectively.
2. A circuit breaker with leakage current protection or residual current protection function according to claim 1, characterized in that... The reset structure includes a swing member (214), a reset member (217), and a transmission assembly. The swing member (214) is rotatably mounted on the housing and is linked to the L-pole operating mechanism through the transmission assembly. The indicator (213) is within the movement trajectory of the swing member (214) at least when the circuit breaker is in the open position. When the circuit breaker is closed, the swing member (214) moves the indicator (213) to realize the reset structure driving the indicator (213). The reset member (217) is used to provide bias pressure to the swing member (214) and drive the swing member (214) back to the initial position after the indicator (213) reaches the normal indicating position.
3. A circuit breaker with leakage current protection or residual current protection function according to claim 2, characterized in that... The transmission assembly includes a rotating component (215), a connecting rod (216), and a locking spring (220). The rotating component (215) is rotatably mounted to the outer casing and is linked to the L-pole operating mechanism. A linkage groove is provided on the swing component (214). The first end of the connecting rod (216) is connected to the rotating component (215), and the second end (216a) is located in the linkage groove. The linkage groove includes a locking groove (221) and a sliding groove (222) that are interconnected. The second end (216a) has a locking groove (221) and a sliding groove (222) in the linkage groove. There are two states; the first state is that the rotating part (215) and the swinging part (214) are in the locking groove (221) under the action of the locking spring (220) to ensure that the transmission is realized between the rotating part (215) and the swinging part (214); the second state is that after the indicator (213) reaches the normal position, under the action of the rotating part (215), the second end (216a) squeezes the locking spring (220) and enters the sliding groove (222). The distance that the second end (216a) moves in the sliding groove (222) is sufficient to ensure that the swinging part (214) returns to the initial position.
4. A circuit breaker with leakage current protection or residual current protection function according to claim 2 or 3, characterized in that... The indicator (213) is provided with a toggle groove (213a). The swinging member (214) drives the indicator (213) by toggle the groove wall of the toggle groove (213a). The length of the toggle groove (213a) is sufficient to ensure that the swinging member (214) will not cause the indicator (213) to slide in the opposite direction when returning to the initial position.
5. A circuit breaker with leakage current protection or residual current protection function according to claim 4, characterized in that... It also includes an N-pole operating mechanism, which includes an N-pole contact support, an N-pole moving contact, and an N-pole stationary contact. The N-pole contact support and / or the N-pole moving contact constitute the rotating member (215).
6. A circuit breaker with leakage current protection or residual current protection function according to claim 1, characterized in that... The indicator (213) is provided with a toggle block (2131). The toggle block (2131) is within the movement trajectory of the trip lever (212) at least when the circuit breaker is in the closed position. When leakage or residual current occurs, the trip lever (212) moves the toggle block (2131) to drive the indicator (213).
7. A circuit breaker with leakage current protection or residual current protection function according to claim 1, characterized in that... The outer shell includes a top cover (2a) and a base (2b). The top cover (2a) and the base (2b) cooperate to form the neutral polar space (2). A mounting block (24) is provided in the base (2b) and is detachably fitted with the base (2b). The top cover (2a) and the mounting block (24) are both provided with grooves (25a, 25b). The guide surface (23) is provided in at least one groove (25a, 25b).
8. A circuit breaker with leakage current protection or residual current protection function according to claim 1, 2, 3, or 6, characterized in that... The outer casing includes a top cover (2a) and a base (2b). The top cover (2a) and the base (2b) cooperate to form the neutral polar space (2). A mounting block (24) is provided in the base (2b) and is detachably fitted with the base (2b). The mounting block (24) is provided with clearance grooves (26a, 26b). The clearance grooves (26a, 26b) are used to reserve space for the movement of the actuator and the release lever (212).
9. A circuit breaker with leakage current protection function or residual current protection function according to claim 1, 2, 3 or 6, characterized in that... The trip lever (212) is provided with a linkage rod (2121) that passes through the L pole space (1). The linkage rod (2121) is located next to the latch (111) of the L pole operating mechanism (11) and is on the side of the latch (111) close to the short circuit protection trip device (112). When leakage or residual current occurs, the trip lever (212) is rotated by the actuation part of the trip device (211) so that the linkage rod (2121) pushes the latch (111) to unlock.