A residual current circuit breaker with contact indication

Abstract

The utility model relates to an electric leakage circuit breaker with contact indication, through contact indication subassembly, the operator does not need to help external tool and complex flow, can clearly know the contact on-off state through the shell observation port, test button subassembly is located on the one side of the release, presses down test button can simulate the action of triggering the release, to this test circuit breaker release performance, test indication subassembly contains indicating part and indication lock, when performance test, the result is directly shown through indicating part, the operator can judge whether the test succeeds or fails and whether the performance index reaches the standard through the observation port, the indication lock can prevent indicating part from moving or changing state accidentally, ensure that the result is accurately recorded and read, test button subassembly and test indication subassembly cooperate, provide reliable guarantee for circuit breaker performance evaluation, reduce the equipment failure rate.

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 contact indicators. Background Technology

[0002] Traditional RCCBs, as a type of residual current circuit breaker, typically only have a leakage current indicator and lack contact indicators. When the contacts open, the leakage current indicator alone cannot determine the circuit's continuity; analysis must be performed based on the handle position, which carries a certain risk of misjudgment. In fact, in the field of electrical protection, RCCBs, as critical circuit protection devices, are widely used in various electrical systems to promptly disconnect circuits when leakage or other faults occur, protecting electrical equipment and lines. However, traditional RCCBs suffer from problems in contact status indication. Many traditional products lack intuitive and effective continuity status display functions, requiring operators to rely on external tools and complex procedures to check contact status, which can easily delay fault handling in emergencies. Regarding the display of performance test results, traditional testing methods require operators to record large amounts of data and perform manual analysis, resulting in low accuracy and efficiency, and susceptibility to human factors. Furthermore, the lack of effective indicating devices during testing makes it difficult to understand the test situation in a timely manner, hindering the discovery of performance problems. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide a fully functional, easy-to-operate, safe and reliable residual current circuit breaker with contact indicators.

[0004] To achieve the above objectives, this utility model employs a residual current circuit breaker with contact indicators, comprising a housing, a bracket and a side plate fixedly mounted on one side of the bracket within the housing, an operating mechanism fixedly mounted between the bracket and the side plate, the operating mechanism including a handle mounted on the bracket and a handle spring wound around the bracket and located between the bracket and the handle, the handle extending movably outside the housing through a handle groove opened in the housing, a trip unit also mounted on the bracket and positioned opposite the handle in the operating mechanism, and a contact indicator assembly provided next to the handle, the contact indicator assembly including components mounted on the bracket... The device includes a contact indicator and an indicator spring wound around the contact indicator. The bracket has a test button assembly and a test indicator assembly mounted on one side of the trip unit. The test button assembly includes a test button and a test button spring. One end of the test button extends pressably out of the housing through a button groove on the housing. The bracket also has a test button spring wound around it. One end of the test button spring is connected to the test button, and the other end abuts against the bracket. The test indicator assembly includes an indicator and an indicator lock respectively mounted on the bracket. The housing has observation ports corresponding to the contact indicator of the contact indicator assembly and the indicator of the test indicator assembly.

[0005] The beneficial effects of the above structure are as follows: the contact indicator assembly allows operators to clearly see the contact open / closed status through the housing observation port without the need for external tools or complex procedures. The indicator spring ensures stable and accurate reflection of the contact status under various environments, enabling operators to respond promptly to contact abnormalities, avoid circuit faults, and improve the safety and stability of circuit operation. The test button assembly is located on the trip unit side; pressing the test button simulates triggering the trip unit to test the circuit breaker's tripping performance. One end of the test button spring is connected to the test button, and the other end rests against the bracket, providing a stable reset force for the button and ensuring that the button resets after each test, ensuring accuracy for the next test. The test indicator assembly includes an indicator element and an indicator lock. During performance testing, the results are displayed intuitively through the indicator element, and operators can judge the success or failure of the test and whether the performance indicators meet the standards by checking the observation port. The indicator lock prevents the indicator element from moving or changing its state due to accidents, ensuring accurate recording and reading of results. The test button assembly and the test indicator assembly work together to provide reliable assurance for circuit breaker performance evaluation and reduce equipment failure rate.

[0006] This utility model further includes a trip reset assembly located on one side of the handle in the operating mechanism. The trip reset assembly includes a re-clamp, a locking latch, a trip latch, and a reset rod mounted on a bracket. The bracket has through holes corresponding to the re-clamp and the reset rod, and one end of the re-clamp and the reset rod extends to one side of the trip unit through the through holes. The re-clamp, locking latch, and trip latch work together to form the core triggering mechanism for the tripping action. During normal operation, the locking latch locks the trip latch, keeping the operating mechanism closed and the circuit conducting normally. If the circuit experiences overload, short circuit, or other faults, the trip unit quickly actuates, and the force is transmitted through the re-clamp to the locking latch, causing it to release the trip latch. The trip latch then drives other components of the operating mechanism to quickly trip and cut off the circuit, protecting electrical equipment and lines. The reset rod and the re-clamp together form a stable tripping system. After tripping, the operating mechanism can be reset by the reset rod, preparing for the next closing operation.

[0007] This utility model is further configured to include a rotating shaft and a wiring assembly within the housing. The bracket has a rotating shaft opening adapted to the rotating shaft. One end of the rotating shaft is located on one side of the handle through the rotating shaft opening, and the other end is located on one side of the trip unit. The wiring assembly includes a stationary wiring assembly and a moving wiring assembly respectively installed at both ends of the housing. The stationary wiring assembly includes a wiring frame, a wiring screw installed on the wiring frame, and a stationary wiring plate installed inside the wiring frame. The stationary wiring plate has stationary contacts. The stationary wiring assembly also has a stationary busbar connected to one end of the stationary wiring plate, and the other end is snapped onto the wiring screw. Both ends of the rotating shaft have contact springs and moving contacts. The moving contacts extend downward to the outside of the rotating shaft through a rotating groove and have rivets corresponding to the stationary contacts on the stationary wiring plate. A connecting rod is also provided between the handle and the rotating shaft, and the connecting rod is installed on the rotating shaft on the side where the handle is located. The handle is connected to the rotating shaft via a connecting rod. When the operator closes or opens the circuit breaker, the movement of the handle is quickly transmitted to the rotating shaft via the connecting rod. The rotating shaft rotates stably under the constraint of the shaft opening, driving the moving contacts at both ends to move synchronously. The moving contacts extend outward through the rotating groove, and their rivets correspond to the stationary contacts of the stationary terminal block. When closing the circuit breaker, the rotating shaft ensures that the rivets of the moving contacts accurately contact the stationary contacts to form a reliable electrical connection. The contact springs enhance the contact pressure. When opening the circuit breaker, the rotating shaft rotates in the opposite direction, and the moving contacts and stationary contacts quickly separate. The contact springs help to open the gap, extinguish the arc, and prevent reignition. Attached Figure Description

[0008] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0009] Figure 2 This is a schematic diagram of the internal structure of the shell according to an embodiment of the present invention.

[0010] Figure 3 This is a schematic diagram of the bracket and side plate in an embodiment of the present invention.

[0011] Figure 4 This is an exploded structural diagram of the other side of the bracket according to an embodiment of the present invention. Detailed Implementation

[0012] like Figures 1-4As shown, an embodiment of this utility model provides a residual current circuit breaker with contact indicators. The circuit breaker includes a housing 1, inside which a bracket 2 is provided. A side plate 21 is installed on one side of the bracket 2. An operating mechanism 3 is installed in the space enclosed by the bracket 2 and the side plate 21. The operating mechanism 3 consists of a handle 31 and a handle spring 32. The handle 31 is installed on the bracket 2, and the handle spring 32 is wound around the bracket 2 and located between the bracket 2 and the handle 31. The handle 31 extends to the housing through a handle groove pre-opened on the housing 1. The operating mechanism 3 is designed for easy operation. In addition, the operating mechanism 3 also includes a tripping and reset assembly 4 located on one side of the handle 31. The tripping and reset assembly 4 includes a re-latch 41, a locking latch 42, a skip latch 43, and a reset rod 44, all of which are mounted on the bracket 2. The bracket 2 has through holes corresponding to the re-latch 41 and the reset rod 44. One end of both extends through the through holes to the side of the trip unit 5. During tripping and reset, the re-latch 41, the locking latch 42, and the skip latch 43 cooperate to trigger the tripping action. The reset rod 44 is used to reset the operating mechanism 3 after tripping.

[0013] In addition to the operating mechanism 3, the circuit breaker is also equipped with a trip unit 5, which is located on the opposite side of the handle 31 in the operating mechanism 3. Next to the handle 31 is a contact indicator assembly 6, which includes a contact indicator 61 and an indicator spring 62 wound around it, for visually displaying the contact status of the circuit breaker. On the bracket 2, a test button assembly 7 and a test indicator assembly 8 are installed on one side of the trip unit 5. The test button assembly 7 includes a test button 71 and a test button spring 72. One end of the test button 71 extends to the outside of the housing 1 through a button slot opened on the housing 1. The test button spring 72 is wound around the bracket 2, with one end connected to the test button 71 and the other end abutting against the bracket 2. Pressing the test button 71 can simulate a circuit fault, trigger the trip unit 5 to act, and test the performance of the circuit breaker. The test indicator assembly 8 includes an indicator 81 and an indicator lock 82, for displaying the status and results during the circuit breaker performance test. To facilitate observation of the contact status and test results, observation ports 11 are opened on the housing 1 corresponding to the contact indicator 61 and the indicator 81.

[0014] The housing 1 also includes a rotating shaft 10 and a wiring assembly 9. The bracket 2 has a rotating shaft opening adapted to the rotating shaft 10. One end of the rotating shaft 10 is located on the side of the handle 31 through the rotating shaft opening, and the other end is located on the side of the trip unit 5. The wiring assembly 9 includes a stationary wiring assembly 91 and a moving wiring assembly 92 respectively installed at both ends of the housing 1. The stationary wiring assembly 91 includes a wiring frame 911, a wiring screw 912, and a stationary wiring plate 913. The stationary wiring plate 913 is provided with stationary contacts and a stationary busbar 914, one end of which is connected to the stationary wiring plate 913. The other end is snapped onto the wiring screw 912 to achieve current collection and connection. Both ends of the rotating shaft 10 are provided with contact springs 101 and moving contacts 102. The moving contact 102 extends downward to the outside of the rotating shaft 10 through the rotating groove opened in the rotating shaft 10, and is provided with a rivet point 103 corresponding to the stationary contact. A connecting rod 311 is provided between the handle 31 and the rotating shaft 10, and is installed on the rotating shaft 10 on the side where the handle 31 is located. The rotating shaft 10 is driven to rotate by the operation of the handle 31, so that the moving contact 102 can contact or separate from the stationary contact, thus completing the circuit opening and closing.

[0015] Of course, in addition to the above embodiments, this utility model may have other various embodiments. Without departing from the essential technical solution of this utility model, those skilled in the art can make various corresponding changes and modifications based on this utility model, and these changes or modifications are equivalent to the technical solution in this patent. Therefore, these corresponding changes and modifications should all fall within the protection scope of the appended claims of this utility model.

Claims

1. A residual current circuit breaker with contact indicator, characterized in that: The device includes a housing, within which a bracket and a side plate fixedly mounted on one side of the bracket are provided. An operating mechanism is fixedly mounted between the bracket and the side plate. The operating mechanism includes a handle mounted on the bracket and a handle spring wound around the bracket and located between the bracket and the handle. The handle extends movably to the outside of the housing through a handle slot on the housing. A trip unit is also mounted on the bracket and is positioned opposite the handle in the operating mechanism. A contact indicator assembly is provided next to the handle. The contact indicator assembly includes a contact indicator mounted on the bracket and an indicator spring wound around the contact indicator. A test button assembly and a test indicator assembly are mounted on the bracket to one side of the trip unit. The test button assembly includes a test button and a test button spring. One end of the test button extends pressably to the outside of the housing through a button slot on the housing. A test button spring is also wound around the bracket. One end of the test button spring is connected to the test button, and the other end abuts against the bracket. The test indicator assembly includes an indicator and an indicator lock respectively mounted on the bracket. The housing has observation ports corresponding to the contact indicator of the contact indicator assembly and the indicator of the test indicator assembly.

2. The residual current circuit breaker with contact indicator according to claim 1, characterized in that: The operating mechanism also includes a trip reset assembly located on one side of the handle. The trip reset assembly includes a re-clamp, a locking buckle, a jump buckle, and a reset rod mounted on a bracket. The bracket has through holes corresponding to the re-clamp and the reset rod. One end of the re-clamp and the reset rod extends to one side of the trip unit through the through holes.

3. The residual current circuit breaker with contact indicator according to claim 1 or 2, characterized in that: The housing also includes a rotating shaft and a wiring assembly. The bracket has a rotating shaft opening adapted to the rotating shaft. One end of the rotating shaft is located on one side of the handle, and the other end is located on one side of the trip unit. The wiring assembly includes a stationary wiring assembly and a moving wiring assembly respectively installed at both ends of the housing. The stationary wiring assembly includes a wiring frame, a wiring screw installed on the wiring frame, and a stationary wiring plate installed inside the wiring frame. The stationary wiring plate has stationary contacts. The stationary wiring assembly also has a stationary busbar connected to one end of the stationary wiring plate and the other end is snapped onto the wiring screw. Both ends of the rotating shaft have contact springs and moving contacts. The moving contacts extend downward to the outside of the rotating shaft through a rotating groove and have rivets corresponding to the stationary contacts on the stationary wiring plate. A connecting rod is also provided between the handle and the rotating shaft. The connecting rod is installed on the rotating shaft on the side where the handle is located.

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