Electric leakage test assembly and circuit breaker
By using the yoke and follower in the electromagnetic tripper to form a double breakpoint in the test circuit of the circuit breaker, the damage caused by the continuous conduction of the circuit breaker test circuit is solved, and rapid conduction and reliable disconnection are achieved. Protect components and save costs.
Patent Information
- Application Number
- CN202411506094.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-24
- Publication Date
- 2024-12-27
AI Technical Summary
In some application scenarios, current flows through the test circuit of the circuit breaker after it is disconnected, resulting in damage to components such as electromagnetic trips. It is difficult for the prior art to effectively avoid such damage.
A leakage test component is designed, using the yoke in the electromagnetic tripper as a conductive element, and the double breakpoints of the test loop are formed through the separation and abutment between the first and second followers and the yoke, so as to achieve the test loop during testing. Quickly conduct and reliably disconnect after the test is completed to avoid damage caused by continuous conduction.
It realizes rapid conduction during testing and reliable disconnection of the test circuit after the test is completed, protecting other components in the circuit breaker and saving costs without the need for additional switching components.
Smart Images
Figure CN119199639A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of circuit breakers, and in particular to a leakage test component and a circuit breaker. Background Art
[0002] The test circuit of the circuit breaker is an important part of the power system to ensure the normal operation and maintenance of the circuit breaker. When the test button is pressed, a short-circuit current appears in the test circuit of the circuit breaker, triggering the opening operation to cut off the power supply circuit. It is used to detect the opening and closing functions of the circuit breaker and the effectiveness of the circuit connectivity.
[0003] The principle of the test circuit is that when the vector sum of the leakage current flowing through the zero-sequence transformer is greater than the set value, the zero-sequence transformer outputs a signal to drive the electromagnetic release to trip, so that the circuit breaker disconnects the power supply circuit. When the circuit breaker draws power from the outlet, no current flows through the test circuit and the zero-sequence transformer after the circuit breaker disconnects the power supply circuit. However, in some application scenarios, the circuit breaker needs to be connected in the form of reverse wiring so that the test circuit still has power after the circuit breaker is disconnected. At this time, if the test button is continuously pressed, the test circuit continues to be turned on, which can easily cause damage to components such as the electromagnetic release. Summary of the invention
[0004] In view of the deficiencies in the prior art, the present application provides a leakage test assembly and a circuit breaker.
[0005] In a first aspect, the present application provides a leakage test assembly, comprising:
[0006] An electromagnetic release, comprising a yoke, wherein the yoke is connected in series in a test circuit of the circuit breaker;
[0007] A first follower, which is arranged in series in the test circuit and is detachably abutted against the magnetic yoke to form a first breakpoint of the test circuit and is used to trigger the test circuit to be turned on;
[0008] A second follower is arranged in series in the test circuit and is detachably abutted against the magnetic yoke to form a second breakpoint of the test circuit, and is used for disconnecting the test circuit when the electromagnetic release is tripped due to leakage current.
[0009] Optionally, a test button is also included;
[0010] The test button is used to drive the first follower to move towards the yoke when being pressed, until the first follower abuts against the yoke, so as to trigger the test circuit to be turned on.
[0011] Optionally, the first follower is arranged in the housing of the circuit breaker and is arranged opposite to the test button;
[0012] The first follower contacts the yoke when the test button is pressed, and is separated from the yoke when no external force is applied to the test button.
[0013] Optionally, the first follower comprises a first elastic conductor sheet;
[0014] One side of the first elastic conductor sheet is connected to the line of the test circuit, and the other side extends to near the magnetic yoke, and the end face of the first elastic conductor sheet is arranged opposite to the test button, so that the test button pushes the first elastic conductor sheet to abut against the magnetic yoke when pressed.
[0015] Optionally, it also includes an indicator and a transmission structure cooperating with the indicator;
[0016] The electromagnetic release is connected to the transmission structure, and is used to drive the transmission structure to move when there is a leakage current, so as to trigger the tripping action of the circuit breaker and unlock the transmission structure and the indicator, so that the indicator drives the second follower to move in a direction away from the yoke until the second follower is separated from the yoke to disconnect the test circuit.
[0017] Optionally, the second follower is disposed in the housing of the circuit breaker and is detachably abutted against one side of an indicator located in the housing of the circuit breaker; the other side of the indicator may extend out of the housing of the circuit breaker;
[0018] Wherein, when the circuit breaker is in a closed state, the second follower is separated from the indicator and abuts against the yoke; when the circuit breaker is in an open state, the second follower is abutted against the indicator and separated from the yoke.
[0019] Optionally, the indicator member includes an indicating block, an abutting block and a locking block;
[0020] The indicating block may extend out of the housing of the circuit breaker, and a second spring connected to the housing is arranged inside the indicating block, and the second spring applies an elastic force to the indicating block in a direction away from the magnetic yoke;
[0021] The abutment block is arranged on the indicating block and is arranged opposite to the second follower. When the circuit breaker is in a closed state, the abutment block is separated from the second follower, and when the circuit breaker is in an open state, the abutment block abuts against the second follower.
[0022] The locking block is arranged on the indicating block and cooperates with the transmission structure to realize locking or unlocking of the indicating member.
[0023] Optionally, the second follower includes a second elastic conductor sheet;
[0024] A connection portion is formed on one side of the second elastic conductor sheet and is connected to a line of the test loop;
[0025] An abutment portion is formed on the other side of the second elastic conductor sheet and is arranged opposite to the abutment block. The end face of the second elastic conductor sheet and the magnetic yoke can be detachably abutted. The abutment block abuts against the abutment portion to drive the second elastic conductor sheet to move in a direction away from the magnetic yoke until the end face of the second elastic conductor sheet is separated from the magnetic yoke.
[0026] Optionally, a base limiting portion is further provided on the housing of the circuit breaker, and the base limiting portion is located on a side of the second elastic conductor sheet close to the connecting portion to limit the second elastic conductor sheet.
[0027] In a second aspect, in one embodiment, the present application provides a circuit breaker, comprising the leakage test assembly as described above.
[0028] Through the above technical solution, this application includes at least the following beneficial technical effects:
[0029] The yoke in the electromagnetic release is connected in series in the test circuit of the circuit breaker as a conductive element. The first follower is naturally separated from the yoke without external force. When a leakage test is required, the test circuit is triggered to be turned on by closing the first breakpoint for testing; the second follower is configured to abut against the yoke without external force, that is, to remain turned on without external force, so that the test circuit is immediately turned on after the first breakpoint is closed to generate leakage current, and then the electromagnetic release is tripped due to the leakage current to provide external force to the second follower, so that the second follower is separated from the yoke, that is, the second breakpoint is disconnected. Thereby, the test circuit can be quickly turned on by closing the first breakpoint, and the test circuit can be reliably disconnected by the second breakpoint after the test is completed, thereby avoiding damage to other components in the circuit breaker caused by the continuous conduction of the test circuit. In addition, the conductive properties of the yoke in the electromagnetic release are used to form the first breakpoint and the second breakpoint, which saves costs and does not require additional switching elements to be set in the test circuit. BRIEF DESCRIPTION OF THE DRAWINGS
[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.
[0031] Figure 1 A plan view of a leakage test assembly in an embodiment of the present application when the circuit breaker is in the on state;
[0032] Figure 2 This is a schematic diagram of the structure of a leakage test assembly in a circuit breaker on state in one embodiment of the present application;
[0033] Figure 3 This is a schematic diagram of the structure of an electromagnetic release in one embodiment of the present application;
[0034] Figure 4 This is a schematic diagram of the structure of a transmission structure in one embodiment of the present application;
[0035] Figure 5 A plan view of a leakage test assembly during a test in one embodiment of the present application;
[0036] Figure 6 A plan view of a leakage test assembly in an embodiment of the present application when the test is finished;
[0037] Figure 7 This is a schematic diagram of the structure of a leakage test component in an embodiment of the present application when the test is completed.
[0038] Explanation of the accompanying drawings: 1. electromagnetic release; 11. yoke; 12. coil; 13. moving iron core; 2. first follower; 21. first elastic conductor sheet; 22. contact portion; 3. second follower; 32. second elastic conductor sheet; 321. connecting portion; 322. abutting portion; 33. base limiting portion; 4. test button; 41. third spring; 5. indicator; 51. indicator block; 52. abutting block; 53. locking block; 54. second spring; 6. transmission structure; 61. transmission plate; 62. locking hole; 63. mounting plate. DETAILED DESCRIPTION
[0039] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of this application.
[0040] In the description of the present application, it should be understood that the terms "first" and "second" are used only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. In the present application, the word "exemplary" is used to mean "used as an example, illustration or description". Any embodiment described as "exemplary" in the present application is not necessarily interpreted as being more preferred or more advantageous than other embodiments. In order to enable any technician in the field to implement and use the present application, the following description is given. In the following description, details are listed for the purpose of explanation. It should be understood that a person of ordinary skill in the art can recognize that the present application can also be implemented without using these specific details. In other examples, well-known structures and processes will not be elaborated in detail to avoid unnecessary details that make the description of the present application obscure. Therefore, the present application is not intended to be limited to the embodiments shown, but is consistent with the widest range of principles and features disclosed in the present application.
[0041] First, based on the contents of the aforementioned background technology of this application, the background of the present application is further elaborated. At present, in order to reduce the possibility of damage to components when the test circuit is tested, a Chinese patent application with publication number CN108072802A discloses a leakage test circuit with double breakpoints, which includes a test button, an indicator and a locking mechanism matched with the indicator, and a first breakpoint and a second breakpoint connected to the test circuit, wherein the first breakpoint is composed of a first conductive sheet and a second conductive sheet, and the second breakpoint is a micro switch. Although the patent realizes double breakpoint control through the first conductive sheet, the second conductive sheet and the micro switch, so that the test circuit is disconnected in time when there is a leakage current, if the area of the first conductive sheet and the second conductive sheet is small, it may be impossible to properly contact to close the first breakpoint. If the area of the first conductive sheet and the second conductive sheet is large, it is not conducive to the miniaturization and integration of the circuit breaker, and it is also necessary to ensure that the positions of the first conductive sheet and the second conductive sheet are completely opposite. Therefore, there are high requirements for the size and position of the first conductive sheet and the second conductive sheet, and the cost of using the micro switch will greatly increase. Therefore, in order to further improve the feasibility of the double breakpoint circuit breaker and reduce the possibility of damage to components when the test circuit is tested, the present application is proposed.
[0042] First, as Figure 1 and Figure 2As shown, in one embodiment, the present application provides a leakage test assembly, which includes an electromagnetic release 1, a first follower 2 and a second follower 3. The electromagnetic release 1 includes a yoke 11, which is connected in series in the test circuit of the circuit breaker; the first follower 2 is arranged in series in the test circuit, and is detachably abutted with the yoke 11 to form a first breakpoint of the test circuit, which is used to trigger the test circuit to be turned on; the second follower 3 is arranged in series in the test circuit, and is detachably abutted with the yoke 11 to form a second breakpoint of the test circuit, which is used to disconnect the test circuit when the electromagnetic release 1 is tripped due to leakage current.
[0043] Among them, the separable abutment means that they are separated from each other in a natural state without external force, and abut under the action of external force, or abut in a natural state without external force, and separated from each other under the action of external force. For example, the first breakpoint can be configured to be separated from the yoke 11 in a state without external force, and abut with the yoke 11 under the action of external force. The second breakpoint can be configured to abut with the yoke 11 in a state without external force, and separate from the yoke 11 under the action of external force. On the one hand, as a part of the electromagnetic release 1, the yoke 11 occupies a large area in the circuit breaker, and the first follower 2 and the second follower 3 can abut with any position of the yoke 11, which improves the reliability of the closing of the first breakpoint and the second breakpoint, and the installation position of the first follower 2 and the second follower 3 is also more flexible. On the other hand, the first breakpoint and the second breakpoint are formed by using the existing yoke 11 in the circuit breaker, without the need to set additional conductive elements or switch elements, which greatly saves costs.
[0044] As an example, the test circuit includes a test resistor, and the two ends of the test resistor can be connected to the neutral line and the live line respectively. The first breakpoint and the second breakpoint can be connected in series to any end of the test resistor at the same time, or can be connected in series to the two ends of the test resistor respectively. The test resistor can be integrated on the circuit board of the circuit breaker, and then the test resistor on the circuit board and the first follower 2 and the second follower 3 can be connected respectively by wires. When the first breakpoint and the second breakpoint are closed at the same time, the test circuit is turned on, so that the neutral line and the live line are short-circuited to generate leakage current, thereby triggering the tripping of the electromagnetic release 1 to open the circuit breaker. When either the first breakpoint or the second breakpoint is disconnected or both are disconnected, the test circuit is disconnected, and no leakage current is generated at this time, and the circuit breaker can be closed and work normally.
[0045] In the above embodiment, the yoke 11 in the electromagnetic release 1 is connected in series in the test circuit of the circuit breaker as a conductive element. The first follower 2 is naturally separated from the yoke 11 without external force. When a leakage test is required, the test circuit is triggered to be turned on by closing the first breakpoint for testing; the second follower 3 is configured to abut against the yoke 11 without external force, that is, to remain turned on without external force, so that the test circuit is immediately turned on after the first breakpoint is closed to generate leakage current, and then the electromagnetic release 1 is tripped due to the leakage current to provide external force to the second follower 3, so that the second follower 3 is separated from the yoke 11, that is, the second breakpoint is disconnected. Thereby, the test circuit can be quickly turned on by closing the first breakpoint, and the test circuit can be reliably disconnected by the second breakpoint after the test is completed, thereby avoiding damage to other components in the circuit breaker due to the continuous conduction of the test circuit. Furthermore, the conductive property of the magnetic yoke 11 in the electromagnetic release 1 is used to form the first breakpoint and the second breakpoint, thereby saving costs and eliminating the need to provide additional switch elements in the test circuit.
[0046] Reference Figure 1 As a further implementation of the leakage test assembly, the leakage test assembly also includes a test button 4; the test button 4 is used to drive the first follower 2 to move toward the direction close to the yoke 11 when pressed until the first follower 2 and the yoke 11 are abutted to trigger the test circuit to be turned on.
[0047] As an example, the test button 4 can be movably arranged on the housing of the circuit breaker, and one end of the test button 4 extends out of the housing of the circuit breaker so as to be pressed when a leakage test is required. A third spring 41 can also be arranged on the housing of the circuit breaker, and the third spring 41 is connected to the housing and the test button 4 to provide the test button 4 with an elastic force to extend the test button 4 out of the housing. When the test button 4 is pressed, the test button 4 moves toward the inside of the housing so as to drive the first follower 2 to move toward the direction close to the yoke 11; when the external force pressing the test button 4 disappears, the test button 4 is reset under the action of the elastic force of the third spring 41, that is, it extends out of the housing of the circuit breaker and is separated from the first follower 2.
[0048] As an implementation mode of the first follower 2, the first follower 2 is arranged in the housing of the circuit breaker and is arranged opposite to the test button 4; the first follower 2 abuts against the yoke 11 when the test button 4 is pressed, and is separated from the yoke 11 when the test button 4 does not apply external force.
[0049] As an example, the first follower 2 includes a first elastic conductor sheet 21; one side of the first elastic conductor sheet 21 is connected to the circuit of the test circuit, and the circuit of the test circuit is also connected to the test resistor on the circuit board, and the other side of the first elastic conductor sheet 21 extends to a position close to the yoke 11, and the side of the first elastic conductor sheet 21 close to the yoke 11 is bent in a direction opposite to the yoke 11 to form a contact portion 22 so that the first elastic conductor sheet 21 and the yoke 11 can be stably contacted and connected. The end surface of the first elastic conductor sheet 21 extending obliquely toward the yoke 11 is arranged opposite to the test button 4, so that the test button 4 pushes the end surface of the first elastic conductor sheet 21 to move when being pressed, so as to drive the contact portion 22 on the first elastic conductor sheet 21 to abut against the yoke 11.
[0050] In the above embodiment, when a leakage test is required, the test button 4 is pressed to move the test button 4 toward the end surface of the first elastic conductor sheet 21, so that the test button 4 pushes the first elastic conductor sheet 21 to abut against the yoke 11, thereby closing the first breakpoint and achieving conduction of the test circuit.
[0051] Reference Figure 3 As an embodiment of the electromagnetic release 1, the electromagnetic release 1 also includes a coil 12, a moving iron core 13 and a first spring; wherein the yoke 11 is arranged on the outside of the coil 12, the shape of the yoke 11 can be U-shaped, and the coil 12 is located in the U-shaped groove of the yoke 11; the moving iron core 13 is arranged coaxially with the coil 12, and is displaced toward the inner hollow of the coil 12 under the action of the electromagnetic force generated by the energization of the coil 12, and a through hole is also provided on the yoke 11 for the moving iron core 13 to pass through; the first spring (not shown in the figure) is connected to the moving iron core 13, and is used to always apply an elastic force extending in the direction of the coil 12 to the moving iron core 13, that is, when the electromagnetic force generated by the energization of the coil 12 is greater than the elastic force of the first spring, the moving iron core 13 begins to displace toward the inner hollow of the coil 12.
[0052] Among them, the yoke 11 is used to constrain and concentrate the magnetic field generated by the coil 12 when it is energized to the desired position to enhance the strength of the magnetic field. The yoke 11 can be made of ferromagnetic material, for example, steel or nickel-iron alloy. By surrounding the yoke 11 on the outside of the coil 12, the magnetic field diverging outward from the coil 12 is constrained to the maximum extent, and the utilization efficiency of the magnetic field is improved, so as to provide a greater electromagnetic force to drive the movement of the moving iron core 13. In this embodiment, the yoke 11 also cooperates with the first follower 2 and the second follower 3, and uses its conductive properties to act as a conductor in series to the test circuit. When the test circuit is turned on, the yoke 11 is energized and a leakage current occurs. At this time, the coil 12 is energized to drive the moving iron core 13 to trigger the circuit breaker to trip. The energized yoke 11 further strengthens the magnetic field distributed around the coil 12, so that the response speed of the electromagnetic release 1 is faster when a leakage current occurs.
[0053] Reference Figure 1 and Figure 4 As a further embodiment of the leakage test assembly, the leakage test assembly also includes an indicator 5 and a transmission structure 6 that cooperates with the indicator 5; the indicator 5 is movably arranged on the housing of the circuit breaker, and a portion of the indicator 5 extends out of the housing. The moving iron core 13 of the electromagnetic release 1 is connected to the transmission structure 6, and is used to drive the transmission structure 6 to move when there is a leakage current, so as to trigger the tripping action of the circuit breaker and unlock the transmission structure 6 and the indicator 5, so that the indicator 5 drives the second follower 3 to move away from the yoke 11 until the second follower 3 is separated from the yoke 11 to disconnect the test circuit. Among them, the status of the indicator 5 includes unlocking and locking. When locked, the indicator 5 cannot move relative to the housing of the circuit breaker, that is, it cannot be pressed. When unlocked, the indicator 5 can be pressed.
[0054] As an implementation mode of the second follower 3, the second follower 3 is arranged in the housing of the circuit breaker and is detachably abutted with one side of the indicator 5 located in the housing of the circuit breaker; the other side of the indicator 5 can extend out of the housing of the circuit breaker; wherein, when the circuit breaker is in the closed state, the second follower 3 is separated from the indicator 5 and abuts against the yoke 11; when the circuit breaker is in the open state, the second follower 3 abuts against the indicator 5 and is separated from the yoke 11.
[0055] As an embodiment of the indicator 5, the indicator 5 includes an indicator block 51, an abutment block 52 and a locking block 53; wherein the indicator block 51 can extend out of the housing of the circuit breaker, and a second spring 54 connected to the housing is arranged inside the indicator block 51, and the second spring 54 applies an elastic force in a direction away from the yoke 11 to the indicator block 51; the abutment block 52 is fixedly arranged on the indicator block 51 and is detachably abutted with the second follower 3; as an example, the abutment block 52 is arranged opposite to the second follower 3, and the abutment block 52 is separated from the second follower 3 in the circuit breaker closed state, and is abutted with the second follower 3 in the circuit breaker open state. The locking block 53 is fixedly arranged on the indicator block 51 and cooperates with the transmission structure 6 to realize the locking or unlocking of the indicator 5.
[0056] Reference Figure 4As an implementation of the transmission structure 6, the transmission structure 6 includes a hinged transmission plate 61; the end of the moving iron core 13 away from the coil 12 is connected to the transmission plate 61 to drive the transmission plate 61 to rotate along the hinge axis, and the transmission plate 61 rotates in the direction close to or away from the coil 12; a locking hole 62 is provided on the transmission plate 61, and the locking block 53 is detachably inserted into the locking hole 62 to lock or unlock the indicator 5. The transmission structure 6 also includes a mounting plate 63, which is fixedly connected to the transmission plate 61, and the mounting plate 63 is used to install an actuator for driving the circuit breaker to trip to control the closing and opening of the circuit breaker. The mounting plate 63 moves synchronously with the transmission plate 61, so that the control of the closing and opening of the circuit breaker is synchronized with the on-off control of the second breakpoint.
[0057] As an example, Figure 6 As shown, when the coil 12 is not energized, the first spring applies elastic force to the moving iron core 13 in the direction of the coil 12, and the locking block 53 is not inserted into the locking hole 62, but abuts against the transmission plate 61. The transmission plate 61 is limited by the locking block 53 and cannot move, so that the transmission plate 61 cannot drive the actuator of the circuit breaker to move, so that the circuit breaker cannot be closed, and the circuit breaker is in the open state. At this time, the indicator 5 is in the unlocked state, and the indicator 5 can be pressed. Figure 1 As shown, after the indicator 5 is pressed, a relative movement occurs between the locking block 53 of the indicator 5 and the transmission plate 61 until the locking block 53 moves out of the locking hole 62 on the transmission plate 61. At this time, the elastic force of the first spring drives the moving iron core 13 to extend in a direction away from the coil 12 to drive the transmission plate 61 to rotate, so that the locking block 53 passes through the locking hole 62, thereby achieving the locking of the indicator 5. At the same time, the transmission plate 61 also drives the mounting plate 63 to rotate, so that the mounting plate 63 drives the actuator to move to put the circuit breaker in a closed state.
[0058] Reference Figure 1 and Figure 2 As an embodiment of the second follower 3, the second follower 3 includes a second elastic conductor sheet 32; a connecting portion 321 is formed on one side of the second elastic conductor sheet 32 to be connected to the circuit of the test circuit; an abutting portion 322 is formed on the other side of the second elastic conductor sheet 32 to be arranged opposite to the abutting block 52, and the relative arrangement direction is consistent with the movement direction of the abutting block 52. For example, the abutting block 52 moves in the vertical direction along with the indicating block 51, and the abutting block 52 and the abutting portion 322 are arranged opposite to each other in the vertical direction. The end face of the second elastic conductor sheet 32 is detachably abutted with the magnetic yoke 11, and the abutting block 52 abuts with the abutting portion 322 so that the abutting block 52 can drive the second elastic conductor sheet 32 to move. The end face of the second elastic conductor sheet 32 is detachably abutted with the magnetic yoke 11, so that the abutting block 52 can drive the second elastic conductor sheet 32 to move in a direction away from the magnetic yoke 11 until the end face of the second elastic conductor sheet 32 is separated from the magnetic yoke 11.
[0059] Reference Figure 1 and Figure 2 As a further embodiment of the leakage test assembly, a base limiting portion 33 is further provided on the housing of the circuit breaker, and the base limiting portion 33 is located on the side of the second elastic conductor sheet 32 close to the connecting portion 321 to limit the second elastic conductor sheet 32. The shape of the base limiting portion 33 can be a cylinder, which is installed on the housing of the circuit breaker by rivets. And the curved side of the base limiting portion 33 contacts the end face of the second elastic conductor sheet 32. When the abutment block 52 drives one side of the second elastic conductor sheet 32 to move away from the yoke 11, the second elastic conductor sheet 32 is elastically bent and deformed in the direction away from the yoke 11 with the base limiting portion 33 as the axial direction, so that the end face of the second elastic conductor sheet 32 is separated from the yoke 11. When the second elastic conductor sheet 32 is not subjected to external force from the abutment block 52, the second elastic conductor sheet 32 that is elastically bent and deformed can be quickly restored to a position in contact with the yoke 11 under the action of the base limiting portion 33.
[0060] In the above embodiment, the cooperation between the second elastic conductor piece 32 and the base stopper 33 enables the second elastic conductor piece 32 to stably separate from or abut against the yoke 11 , thereby achieving on-off control of the second breakpoint.
[0061] The present disclosure exemplarily describes the working process of the leakage test assembly:
[0062] Combination Figure 1 and Figure 2 , Figure 1 and Figure 2 The schematic diagram illustrates a state in which the circuit breaker is closed and working normally and the test circuit is not conducting. The first elastic conductor piece 21 and the yoke 11 are separated from each other, and the second elastic conductor piece 32 is in contact with the yoke 11, that is, the first break point is disconnected and the second break point is conducting, so the test circuit is not conducting.
[0063] Combination Figure 5 , Figure 5 The schematic diagram of the test circuit being turned on for the test state is illustrated. Under the action of external force, the test button 4 moves toward the direction close to the first elastic conductor sheet 21 and pushes the first elastic conductor sheet 21 to contact the yoke 11. At this time, the first breakpoint is turned on, so that the test circuit is turned on and leakage current begins to be generated. Since the coil 12 in the electromagnetic release 1 is energized to drive the moving iron core 13 to move, a certain response time is required, usually 10ms to 50ms. Therefore, the second breakpoint has not been disconnected during this process, and the circuit breaker has not performed the tripping action and is in the closed state.
[0064] Combination Figure 6 and Figure 7 , Figure 6 and Figure 7 The schematic diagram of the test circuit test completion is illustrated. After the leakage current exceeds the above response time, the electromagnetic force generated by the coil 12 being energized drives the moving iron core 13 to move toward the hollow part inside the coil 12, so as to drive the transmission plate 61 to rotate in the direction close to the coil 12. At this time, the locking block 53 is disengaged from the locking hole 62, and the indicator 5 moves in the direction away from the locking hole 62 under the elastic force of the second spring 54, so that the locking block 53 abuts against the transmission plate 61. At the same time, the locking block 53 drives the abutment block 52 to move in the direction close to the second elastic conductor sheet 32 during the movement, and the second elastic conductor sheet 32 is driven to separate from the yoke 11 through the abutment block 52, and the second breakpoint is disconnected to disconnect the test circuit, that is, the leakage test is completed. At this time, even if the test button 4 is pressed continuously by mistake to close the first breakpoint, the test circuit will not continue to be turned on, thereby protecting the components in the circuit breaker from being damaged by large current. In addition, when the transmission plate 61 rotates toward the coil 12 , the transmission plate 61 drives the mounting plate 63 to rotate together, so that the tripping mechanism installed on the mounting plate 63 performs a tripping action to open the circuit breaker.
[0065] Continue to combine Figure 1 and Figure 2 After the circuit breaker is opened, since the locking block 53 abuts against the transmission plate 61, the position of the transmission plate 61 is limited, so that the transmission plate 61 can no longer drive the actuator on the mounting plate 63 to restore the closed state. Therefore, it is necessary to press the indicator 5 at this time to make the locking block 53 pass through the locking hole 62, and the transmission plate 61 rotates in the direction away from the coil 12, so as to drive the actuator to complete the closing of the circuit breaker, that is, to restore the normal operation of the circuit breaker.
[0066] In a second aspect, in one embodiment, the present application provides a circuit breaker, and the circuit breaker includes the leakage test assembly as described above.
[0067] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.
[0068] The embodiments, implementation methods and related technical features of the present application can be combined and replaced with each other without conflict.
[0069] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
Claims
1. A leakage test assembly, characterized in that: include: An electromagnetic release, comprising a yoke, wherein the yoke is connected in series in a test circuit of the circuit breaker; A first follower, which is arranged in series in the test circuit and is detachably abutted against the magnetic yoke to form a first breakpoint of the test circuit and is used to trigger the test circuit to be turned on; A second follower is arranged in series in the test circuit and is detachably abutted against the magnetic yoke to form a second breakpoint of the test circuit, and is used for disconnecting the test circuit when the electromagnetic release is tripped due to leakage current.
2. The leakage test assembly according to claim 1, characterized in that: Also includes a test button; The test button is used to drive the first follower to move towards the yoke when being pressed, until the first follower abuts against the yoke, so as to trigger the test circuit to be turned on.
3. The leakage test assembly according to claim 2, characterized in that: The first follower is arranged in the housing of the circuit breaker and is arranged opposite to the test button; The first follower contacts the yoke when the test button is pressed, and is separated from the yoke when no external force is applied to the test button.
4. The leakage test assembly according to claim 2, characterized in that: The first follower comprises a first elastic conductor sheet; One side of the first elastic conductor sheet is connected to the line of the test circuit, and the other side extends to near the magnetic yoke and is bent to form a contact portion, and the end face of the first elastic conductor sheet is arranged opposite to the test button, so that the test button pushes the first elastic conductor sheet when pressed, so that the contact portion abuts against the magnetic yoke.
5. The leakage test assembly according to claim 1, characterized in that: It also includes an indicator and a transmission structure matched with the indicator; The electromagnetic release is connected to the transmission structure, and is used to drive the transmission structure to move when there is a leakage current, so as to trigger the tripping action of the circuit breaker and unlock the transmission structure and the indicator, so that the indicator drives the second follower to move in a direction away from the yoke until the second follower is separated from the yoke to disconnect the test circuit.
6. The leakage test assembly according to claim 5, characterized in that: The second follower is disposed in the housing of the circuit breaker and is detachably abutted against one side of the indicator located in the housing of the circuit breaker; the other side of the indicator can extend out of the housing of the circuit breaker; Wherein, when the circuit breaker is in a closed state, the second follower is separated from the indicator and abuts against the yoke; when the circuit breaker is in an open state, the second follower is abutted against the indicator and separated from the yoke.
7. The leakage test assembly according to claim 6, characterized in that: The indicator member comprises an indicator block, an abutment block and a locking block; The indicating block may extend out of the housing of the circuit breaker, and a second spring connected to the housing is arranged inside the indicating block, and the second spring applies an elastic force to the indicating block in a direction away from the magnetic yoke; The abutment block is arranged on the indicating block and is arranged opposite to the second follower. When the circuit breaker is in a closed state, the abutment block is separated from the second follower, and when the circuit breaker is in an open state, the abutment block abuts against the second follower. The locking block is arranged on the indicating block and cooperates with the transmission structure to realize locking or unlocking of the indicating member.
8. The leakage test assembly according to claim 7, characterized in that: The second follower comprises a second elastic conductor sheet; A connection portion is formed on one side of the second elastic conductor sheet and is connected to a line of the test loop; An abutment portion is formed on the other side of the second elastic conductor sheet and is arranged opposite to the abutment block. The end face of the second elastic conductor sheet and the magnetic yoke can be detachably abutted. The abutment block abuts against the abutment portion to drive the second elastic conductor sheet to move in a direction away from the magnetic yoke until the end face of the second elastic conductor sheet is separated from the magnetic yoke.
9. The leakage test assembly according to claim 8, characterized in that: A base limiting portion is also provided on the housing of the circuit breaker, and the base limiting portion is located on a side of the second elastic conductor sheet close to the connecting portion to limit the second elastic conductor sheet.
10. A circuit breaker, characterized in that: include: A leakage test assembly as claimed in any one of claims 1 to 9.