A residual current circuit breaker with a straight-through N-pole conductor
By using a straight-through N-pole conductor and an inclined leakage detection module in the residual current circuit breaker, combined with the neat arrangement of wiring channels on the inner wall of the casing, the problem of messy wires occupying space is solved, and the miniaturization and safety improvement of the circuit breaker are achieved.
Patent Information
- Application Number
- CN202522635475.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-12
- Publication Date
- 2026-11-06
- Estimated Expiration
- 2035-12-12
AI Technical Summary
In existing residual current circuit breakers, the wiring of the L and N poles is messy and takes up a lot of space, making it difficult to reduce the size of the equipment, and there are risks of insulation wear and short circuits.
The leakage current detection module adopts a straight N-pole conductor and is installed at an angle. It is arranged in a regular manner with the wiring groove on the inner wall of the housing to shorten the conductive path. The test circuit is conducted through the inclined structure to avoid arc erosion.
This design achieves a compact circuit breaker, improves the durability and safety of the testing function, and reduces assembly complexity and failure risk.
Smart Images
Figure CN224946756U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of circuit breaker technology, and in particular to a residual current circuit breaker with a straight-through N-pole conductor. Background Technology
[0002] Residual current circuit breakers (RCCBs) are core devices in low-voltage power distribution systems that ensure electrical safety. They mainly consist of internal functional components housed in a casing. They rely on the coordinated operation of a handle operating mechanism, signal processing module, tripping mechanism, and contact mechanism to achieve circuit on / off control and fault protection against overload, short circuit, and leakage.
[0003] In the existing technology, leakage current detection modules mostly adopt a vertical orthogonal installation method, and require independent wiring channels to be reserved in the housing for L-pole, N-pole wires and test circuits. Each wire is mostly free-running or simply fixed, lacking a structure to constrain the arrangement of the wire harness.
[0004] However, the aforementioned traditional structure has significant technical drawbacks in practical applications. First, the orthogonally mounted leakage detection module occupies a large projected space along the length of the housing, and the L and N pole wires require a sufficiently long path to pass through the detection holes, extending the conductive path and resulting in low utilization of the internal space of the housing. This makes it difficult to further reduce the overall size of the product, which is not conducive to the miniaturization and high integration requirements of modern distribution boxes. Second, the haphazard wiring not only increases assembly complexity and labor costs, but also poses risks such as insulation wear and short circuits due to the cross-twisted wires being prone to displacement under transportation vibration or the impact of switching on and off.
[0005] To address the aforementioned shortcomings, a residual current circuit breaker with a straight-through N-pole conductor is provided. Utility Model Content
[0006] The purpose of this utility model is to provide a residual current circuit breaker with a straight-through N-pole conductor in order to solve the above-mentioned problems.
[0007] To achieve the above objectives, this utility model adopts the following technical solution: a residual current circuit breaker with a straight-through N-pole conductor, comprising a housing, and a handle operating mechanism, a signal processing module, a tripping mechanism, and a contact mechanism installed in the housing, and further comprising: The wiring trough, located on the inner wall of the housing, provides a channel for the arrangement of wires inside the circuit breaker; The conductive module consists of an L-pole wire and an N-pole wire located inside the housing, and is responsible for transmitting the main current of the circuit. The leakage current detection module is installed at an angle inside the housing to monitor the current balance of the conductive module in real time.
[0008] Preferably, the N-pole conductor is a straight conductor, maintaining electrical connection between the N-pole incoming terminal and the outgoing terminal in both the closed and open states of the circuit breaker.
[0009] Preferably, the leakage current detection module is a current transformer, and the L-pole wire and the N-pole wire are run in parallel through the detection hole of the current transformer.
[0010] Preferably, a testing module is disposed within the housing, the testing module comprising: The test spring is positioned and fixed by a pre-set protrusion on the inner wall of the housing, and is arranged in the upper area of the corresponding wiring groove to avoid arc erosion; A test torsion spring is assembled in the housing. One end of the test torsion spring is electrically connected to the L pole wire, and the other end is correspondingly set with the test spring plate. When the two are in contact, they form a test circuit. The trigger component, installed inside the housing, activates the test circuit to simulate a leakage current scenario.
[0011] Preferably, the triggering component includes: A test button is provided, which extends through the outer wall of the housing. The guide rod is arranged along the preset guide channel of the housing, with one end fixed to the test button and the other end corresponding to the test spring. A compression spring is sleeved on the outside of the guide rod and abuts against the test button and the inner wall of the housing, providing a reset spring force for the guide rod and the test button.
[0012] Preferably, the end faces of the guide rod and the test spring are fitted together to form a mutually compatible inclined structure, and the force transmitted by the inclined surface drives the deformation of the test spring.
[0013] Preferably, the wiring groove is disposed on the inner wall of the housing, and its groove orientation avoids the arc generation area of the contact mechanism.
[0014] Preferably, the signal processing module is an integrated circuit board, with its input terminal electrically connected to the leakage current detection module and its output terminal electrically connected to the tripping mechanism.
[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are: 1. In this application, by tilting the leakage current detection module near the N-pole wire inlet and outlet, and cooperating with the wiring groove on the inner wall of the housing to arrange the L-pole, N-pole and test circuit wires in a regular manner, the projected size of the housing in the length direction is effectively reduced, the internal three-dimensional space structure is fully utilized, the conductive path is shortened and additional wiring space is saved, thereby reducing the overall size of the device and realizing the compact design of the circuit breaker.
[0016] 2. In this application, the test module is set in the upper area of the wiring trough to avoid the arc erosion of the contact mechanism. The guide rod and the test spring adopt a mutually compatible inclined structure to realize the efficient transmission of axial thrust to lateral deformation force. This not only ensures the reliable switching of the test circuit under the simulated leakage current scenario, but also avoids the space occupation and susceptibility to interference of the test device through the compact arrangement of the structure, thereby improving the durability, safety and response reliability of the test function. Attached Figure Description
[0017] Figure 1 A schematic diagram of the internal structure of a circuit breaker provided according to an embodiment of the present invention is shown; Figure 2 A schematic diagram of the mating structure of the test spring and the test torsion spring according to an embodiment of the present invention is shown; Figure 3 A schematic diagram of the assembly structure of a current transformer according to an embodiment of the present invention is shown.
[0018] Legend: 1. Housing; 101. Wiring trough; 2. Signal processing module; 3. Tripping mechanism; 4. Test button; 5. Guide rod; 6. Compression spring; 7. Test spring; 8. Test torsion spring; 9. Leakage detection module; 10. Handle operating mechanism; 11. Contact mechanism; 12. L pole wire; 13. N pole wire. Detailed Implementation
[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.
[0020] Please see Figure 1-3 This utility model provides a technical solution: a leakage circuit breaker with a straight N-pole conductor, including a housing 1, and a handle operating mechanism 10, a signal processing module 2, a tripping mechanism 3 and a contact mechanism 11 installed in the housing 1.
[0021] The housing 1 provides a stable mounting space for all internal components and isolates them from external environmental interference. The handle operating mechanism 10 drives the moving and stationary contacts of the contact mechanism 11 to close or separate via mechanical linkage, achieving manual control of normal circuit connection and disconnection. The signal processing module 2 receives leakage detection signals, analyzes and converts them, and generates precise tripping trigger commands. The tripping mechanism 3 receives the commands from the signal processing module 2 and quickly drives the contact mechanism 11 to disconnect. The contact mechanism 11 directly controls the conduction and disconnection of the main circuit through the contact and separation of the contacts.
[0022] The circuit breaker's housing 1, handle operating mechanism 10, signal processing module 2, tripping mechanism 3, and contact mechanism 11 all belong to the general basic architecture of residual current circuit breakers. The structural form, connection relationship, and working principle of these components are mature technologies in this field and will not be elaborated here.
[0023] Also includes: The wiring trough 101 is located on the inner wall of the housing 1 to provide a routing channel for the internal wires of the circuit breaker.
[0024] The wiring trough 101 neatly arranges the L-pole wire 12, N-pole wire 13, test circuit, signal transmission and other wires inside the circuit breaker, which can avoid the wires from being messy and tangled, and shorten the conductive path and reduce the space occupation by the neat wiring.
[0025] The conductive module consists of an L-pole wire 12 and an N-pole wire 13 disposed inside the housing 1, and is responsible for transmitting the main current of the circuit.
[0026] The main current of the circuit is provided by the L-pole wire 12 and the N-pole wire 13, where the L-pole wire 12 carries the live wire current and the N-pole wire 13 carries the neutral wire current, so as to achieve stable current transmission.
[0027] The leakage current detection module 9 is installed at an angle inside the housing 1 to monitor the current balance of the conductive module in real time.
[0028] The leakage current detection module 9 is installed at an angle inside the housing 1 to monitor the current transmission status of the conductive module composed of the L-pole wire 12 and the N-pole wire 13. It captures leakage current anomalies by monitoring the balance of the currents between the two poles. The angled layout of the leakage current detection module 9, located near the N-pole wire 13, effectively reduces the projected size of the housing 1 along its length, making full use of the internal space structure. This reduces the overall size of the device and saves space required for additional wiring by shortening the conductive path.
[0029] The testing module, integrated in the housing 1, tests the effectiveness of the coordinated operation of the leakage current detection module 9, the signal processing module 2, and the tripping mechanism 3.
[0030] By integrating the test module into the housing 1, a leakage current scenario is simulated to trigger the coordinated action of the leakage current detection module 9, the signal processing module 2, and the tripping mechanism 3, thereby verifying whether the signal transmission, command conversion, and the execution of the tripping mechanism 3 are effective.
[0031] Specifically, such as Figure 3 As shown, the N-pole conductor 13 is a straight conductor, which maintains the electrical connection between the N-pole incoming terminal and the outgoing terminal in both the closed and open states of the circuit breaker.
[0032] The N-pole conductor 13 adopts a straight-through structure and does not form a linkage with the contact mechanism 11 or the tripping mechanism 3. In different working states of the circuit breaker, whether it is closed or open, it always maintains a continuous electrical connection between the N-pole incoming terminal and the outgoing terminal, ensuring the stability of the neutral current transmission.
[0033] Specifically, such as Figure 2 As shown, the test module includes: The test spring 7 is positioned and fixed by a pre-set protrusion on the inner wall of the housing 1, and is arranged in the upper area of the wiring groove 101 to avoid arc erosion.
[0034] The test spring 7 is positioned in the upper area of the wiring groove 101 to avoid the arc erosion generated when the contact mechanism 11 breaks, thus ensuring the structural stability and the reliability of the test circuit.
[0035] The test torsion spring 8 is assembled in the housing 1. One end of the test torsion spring 8 is electrically connected to the L pole wire 12, and the other end is correspondingly set with the test spring 7. When the two are in contact, they form a test circuit. The trigger component, installed inside housing 1, drives the test circuit to conduct in order to simulate a leakage current scenario.
[0036] When the triggering component is manually operated, it will push the test spring 7 to contact the test torsion spring 8. The contact between the two will form a complete test circuit, simulating the abnormal current path when the circuit leaks current, thereby providing test conditions for verifying the effectiveness of the coordinated work of the leakage detection module 9, the signal processing module 2 and the tripping mechanism 3.
[0037] Triggering components include: Test button 4 is installed through the outer wall of housing 1; The guide rod 5 is arranged along the preset guide channel of the housing 1, with one end fixed to the test button 4 and the other end corresponding to the test spring 7; A compression spring 6 is sleeved on the outside of the guide rod 5 and abuts against the test button 4 and the inner wall of the housing 1, providing a reset force for the guide rod 5 and the test button 4.
[0038] The end faces of the guide rod 5 and the test spring 7 that are in contact with each other form a mutually compatible inclined structure, and the force transmitted through the inclined surface drives the test spring 7 to deform.
[0039] When the test button 4 is manually pressed, the guide rod 5, which is fixedly connected to the test button 4, moves synchronously along the preset guide channel of the housing 1. Since the end face of the guide rod 5 facing the test spring 7 and the corresponding end face of the test spring 7 are mutually adapted inclined structures, the axial thrust of the guide rod 5 can be converted into a lateral force that drives the test spring 7 to deform through the inclined surface, causing the test spring 7 to contact the test torsion spring 8 to conduct the test circuit. When the test button 4 is released, the compression spring 6 sleeved on the outside of the guide rod 5 will release its elastic potential energy, causing the guide rod 5 and the test button 4 to quickly reset. At the same time, the test spring 7 will also return to its initial position due to its own elasticity, thus disconnecting the test circuit and enabling the repeated use of the trigger component.
[0040] Specifically, such as Figures 1-3 As shown, the wiring groove 101 is disposed on the inner wall of the housing 1, and its groove is oriented to avoid the arc generation area of the contact mechanism 11.
[0041] By pre-setting a wiring groove 101 on the inner wall of the housing 1 and avoiding the arc-generating area of the contact mechanism 11, the high-temperature arc generated when the contact mechanism 11 breaks the circuit can be isolated, preventing damage to the wires in the wiring groove 101 and thus avoiding faults such as short circuits and leakage. At the same time, the wiring groove 101 plays a role in regulating and constraining the wires, ensuring the stability of the transmission path of each line, and further improving the overall safety and reliability of the circuit breaker.
[0042] The signal processing module 2 is an integrated circuit board. The input terminal of the signal processing module 2 is electrically connected to the leakage current detection module 9, and the output terminal is electrically connected to the tripping mechanism 3.
[0043] The integrated circuit board receives the current balance monitoring signal transmitted by the leakage current detection module 9 through the input terminal. After internal processing to determine whether the circuit is leaking current, it sends a trigger command to the tripping mechanism 3 through the output terminal, thereby realizing the signal conversion and command transmission of leakage current protection.
[0044] The above description of the embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A residual current circuit breaker with a straight-through N-pole conductor, comprising a housing (1), and a handle operating mechanism (10), a signal processing module (2), a tripping mechanism (3), and a contact mechanism (11) installed in the housing (1), characterized in that, Also includes: The wiring trough (101) is provided on the inner wall of the housing (1) to provide a routing channel for the internal wires of the circuit breaker; The conductive module consists of an L-pole wire (12) and an N-pole wire (13) disposed inside the housing (1); The leakage current detection module (9) is installed at an angle inside the housing (1) and monitors the current balance of the conductive module in real time.
2. A residual current circuit breaker with a straight-through N-pole conductor according to claim 1, characterized in that, The N-pole conductor (13) is a straight conductor, which maintains electrical connection between the N-pole incoming terminal and the outgoing terminal in both the closed and open states of the circuit breaker.
3. A residual current circuit breaker with a straight-through N-pole conductor according to claim 1, characterized in that, The leakage current detection module (9) is a current transformer, and the L pole wire (12) and N pole wire (13) are run in parallel through the detection hole of the current transformer.
4. A residual current circuit breaker with a straight-through N-pole conductor according to claim 1, characterized in that, A test module is provided inside the housing (1), and the test module includes: The test spring (7) is positioned and fixed by a pre-set protrusion on the inner wall of the housing (1), and is arranged in the upper area of the corresponding wiring groove (101) to avoid arc erosion. The test torsion spring (8) is assembled in the housing (1). One end of the test torsion spring (8) is electrically connected to the L pole wire (12), and the other end is correspondingly set with the test spring (7). When the two are in contact, they form a test circuit. The trigger component, installed inside the housing (1), drives the test circuit to conduct to simulate a leakage current scenario.
5. A residual current circuit breaker with a straight-through N-pole conductor according to claim 4, characterized in that, The triggering component includes: Test button (4), the test button (4) is disposed through the outer wall of housing (1); The guide rod (5) is arranged along the preset guide channel of the housing (1), with one end fixed to the test button (4) and the other end corresponding to the test spring (7); A compression spring (6) is sleeved on the outside of the guide rod (5) and abuts against the test button (4) and the inner wall of the housing (1) to provide a reset spring force for the guide rod (5) and the test button (4).
6. A residual current circuit breaker with a straight-through N-pole conductor according to claim 5, characterized in that, The guide rod (5) and the end face of the test spring (7) that are in contact with each other form a mutually compatible inclined structure, and the test spring (7) is driven to deform by the force transmitted through the inclined surface.
7. A residual current circuit breaker with a straight-through N-pole conductor according to claim 1, characterized in that, The wiring groove (101) is located on the inner wall of the housing (1), and its groove direction avoids the arc generation area of the contact mechanism (11).
8. A residual current circuit breaker with a straight-through N-pole conductor according to claim 1, characterized in that, The signal processing module (2) is an integrated circuit board. The input end of the signal processing module (2) is electrically connected to the leakage current detection module (9), and the output end is electrically connected to the tripping mechanism (3).