Dielectric switch and circuit breaker
Through the compact design and rotation switching structure of the dielectric switch, the problems of large dielectric switch size and easy breakdown of the circuit board are solved, and the circuit breaker is miniaturized and the reliability is improved.
Patent Information
- Application Number
- CN202422292807.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-19
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-09-19
AI Technical Summary
The existing dielectric switch structure is large, resulting in high cost of circuit breakers and cannot effectively reduce the possibility of circuit board breaking down during interphase insulation performance testing.
A dielectric switch is designed to realize the compact design of the dielectric switch within the same volume through the rotational switching structure between the static contact assembly and the movable contact assembly, combining the limit structure and elastic parts, and cut off the electrical connection between the main circuit and the circuit board during testing, increasing creepage distance and electrical clearance.
The dielectric switch is miniaturized, the manufacturing cost of the circuit breaker is reduced, and the circuit board is effectively protected from breakdown, improving the reliability and safety of the circuit breaker.
Smart Images
Figure CN223092791U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of electrical components, and particularly to a dielectric switch and a circuit breaker. Background Art
[0002] A circuit breaker is an electrical component that can break a circuit and provide safety protection for the circuit. In the event of faults such as overload, short circuit, and leakage in the circuit, the circuit breaker can be in an open state to cut off the circuit and reduce the possibility of further spread of the fault. To ensure the reliability of the circuit breaker, the phase insulation ability of the circuit breaker is usually tested.
[0003] In the related art, when testing the phase insulation performance of a circuit breaker, the main circuit of the circuit breaker needs to be disconnected from the power supply line, and a dielectric switch is used to enable the circuit breaker to draw power from the circuit board for insulation performance testing.
[0004] However, based on the structure of the existing dielectric switch, in order to ensure the reliability of the dielectric switch, the volume of the dielectric switch is relatively large, which in turn increases the manufacturing cost of the circuit breaker. Summary of the Utility Model
[0005] This application provides a dielectric switch and a circuit breaker, so that the structure of the dielectric switch is relatively compact, which is conducive to the miniaturization development of the dielectric switch and the circuit breaker, and thus reduces the manufacturing cost of the circuit breaker.
[0006] In a first aspect, this application provides a dielectric switch for the insulation performance test of a circuit breaker. The circuit breaker includes a circuit board and a main circuit, and the circuit board is electrically connected to the main circuit. The dielectric switch may include a static contact assembly, a moving contact assembly, and a triggering structure.
[0007] The static contact assembly is electrically connected to the first wire group. The static contact assembly may include a first static contact and a second static contact arranged at intervals. The moving contact assembly is electrically connected to the second wire group. The moving contact assembly may include a first moving contact and a second moving contact arranged at intervals. The first moving contact can be electrically connected to the first static contact, and the second moving contact can be electrically connected to the second static contact. The triggering structure is fixedly connected to the moving contact assembly, and the triggering structure drives the moving contact assembly to rotate relative to the static contact. The rotation direction of the moving contact assembly is tangent to the arrangement direction of the first static contact and the second static contact group, so that the dielectric switch can be switched between a conducting state and a non-conducting state.
[0008] According to the dielectric switch provided by the example of the present application, the dielectric switch is connected between the main circuit and the circuit board. The static contact assembly and the moving contact assembly can be switched between a conducting state and a non-conducting state. In the case of the phase insulation performance test of the circuit breaker, the dielectric switch can be in the non-conducting state to cut off the electrical connection between the main circuit and the circuit board. Based on this, the detection voltage of the phase insulation performance test cannot flow through the main circuit to reach the circuit board, reducing the possibility of the circuit board being broken down and ensuring the reliability of the circuit board in use.
[0009] In addition, compared with the prior art, when the moving contact assembly slides along the arrangement direction of the first moving contact and the second moving contact, it is necessary to set a relatively large interval between the first moving contact and the second moving contact to ensure the reliability of the dielectric switch in use. In the example of the present application, the trigger structure is fixedly connected to the moving contact assembly. Driven by the trigger structure, the moving contact assembly can rotate relative to the static contact assembly, and the rotation direction of the moving contact assembly is tangent to the arrangement direction of the first moving contact and the second moving contact. In the same volume, the opening distance of the dielectric switch can be made larger, ensuring the reliability of the dielectric switch in use. The dielectric switch structure provided by the example of the present application is more compact, reducing the volume of the dielectric switch, improving the utilization rate of the internal space of the dielectric switch, and being beneficial to the miniaturization development of the dielectric switch and the circuit breaker.
[0010] In some possible implementation manners, the static contact assembly further includes a first connecting sleeve. The first connecting sleeve is provided with a first through hole and a second through hole which are arranged at intervals. The first through hole and the second through hole are arranged along the extending direction of the first connecting sleeve. The first static contact is provided with a first protrusion, and the first protrusion can pass through the first through hole to contact the first moving contact. The second static contact is provided with a second protrusion, and the second protrusion can pass through the second through hole to contact the second moving contact.
[0011] Based on the above, the first through hole and the second through hole are both arranged on the first connecting sleeve, the first protrusion is arranged on the first static contact, and the first protrusion can pass through the first through hole to contact the first moving contact. The second protrusion is arranged on the second static contact, and the second protrusion can pass through the second through hole to contact the second moving contact. Based on this, the electrical connection between the static contact assembly and the moving contact assembly can be realized.
[0012] By providing the first connecting sleeve, the creepage distance and the electrical clearance between the first static contact and the first moving contact, as well as between the second static contact and the second moving contact, can be increased, ensuring the safety of the dielectric switch in use.
[0013] In some possible implementation manners, the first through hole is arranged at a first position of the first connecting sleeve, the second through hole is arranged at a second position of the first connecting sleeve, and the first position and the second position are oppositely arranged.
[0014] Based on the above, since the first position and the second position are oppositely arranged, the first position is provided with a first through hole which cooperates with the first protrusion on the first static contact, and the second position is provided with a second through hole which cooperates with the second protrusion on the second static contact. Therefore, the positions where the first static contact contacts the first moving contact and the second static contact contacts the second moving contact are oppositely arranged. When the distances between the positions where the first static contact contacts the first moving contact and the second static contact contacts the second moving contact in the dielectric switch are equal, the dielectric switch provided by the example of the present application is smaller in size and more compact in structure, which is beneficial to the miniaturization development of the dielectric switch and the circuit breaker.
[0015] In some possible implementation manners, a first limiting structure is provided between the first protrusion and the second protrusion, and the first static contact can abut against the first limiting structure. Alternatively, the second static contact can abut against the first limiting structure.
[0016] Since the first limiting structure is provided on the first connecting sleeve and between the first protrusion and the second protrusion, during the assembly process of the first static contact and the first connecting sleeve, the first static contact can abut against the first limiting structure. Through the cooperation between the first static contact and the first limiting structure, the amplitude of the first static contact shaking relative to the first connecting sleeve can be reduced, ensuring the connection reliability between the first static contact and the first connecting sleeve.
[0017] The function of the second static contact cooperating with the first limiting structure is similar to that of the first static contact cooperating with the first limiting structure, and the example of the present application will not elaborate here.
[0018] In some possible implementation manners, the circuit breaker further includes a housing, the housing is provided with a second limiting structure, the dielectric switch further includes a third limiting structure, and the third limiting structure is fixedly connected to the triggering structure. When the second limiting structure is engaged with the third limiting structure, the dielectric switch is in an open circuit state, so that the circuit breaker can perform an insulation performance test. When the second limiting structure is separated from the third limiting structure, the dielectric switch is in a conducting state and the circuit breaker is in a working state.
[0019] When the dielectric switch is in a conducting state, the second limiting structure and the third limiting structure can be in a separated state. When the dielectric switch is in an open circuit state, the second limiting structure and the third limiting structure can be in an engaged state, so that the dielectric switch can be maintained in the open circuit state, and further the dielectric switch can cut off the electrical connection between the main circuit and the circuit board for a long time, facilitating the interphase insulation performance test of the circuit breaker.
[0020] In some possible implementation manners, the dielectric switch further includes an elastic member, one end of the elastic member is connected to the inner wall of the housing, and the other end of the elastic member is connected to the moving contact assembly.
[0021] During the rotation of the trigger structure, regardless of whether the distance between the trigger structure and the static contact assembly changes, since the trigger structure is fixedly connected to the moving contact assembly, the rotation of the trigger structure can drive the rotation of the moving contact assembly. Also, since the moving contact assembly is connected to the elastic member, the moving contact assembly can drive the elastic member to deform along the rotation direction of the moving contact assembly. The elastic member can generate a force for restoring deformation, and after the engagement between the trigger structure and the housing is released, the elastic member can restore deformation under this force and drive the trigger structure and the moving contact assembly back to the initial position.
[0022] In some possible implementation manners, the static contact assembly further includes a third static contact. The moving contact assembly further includes a third moving contact, and the third moving contact can be electrically connected to the third static contact.
[0023] For the dielectric switch provided by the examples of the present application, on the basis of having a first static contact, a first moving contact, a second static contact, and a second moving contact, a third static contact and a third moving contact are further provided. Therefore, according to the dielectric switch provided by the examples of the present application, the three sets of contacts can be simultaneously connected between the three main circuits of the circuit breaker and the circuit board, so that when the dielectric switch is in the open state, the electrical connections between the three main circuits of the circuit breaker and the circuit board can be simultaneously cut off, further reducing the possibility of the detection voltage flowing through the main circuit to the circuit board and reducing the possibility of the circuit board being broken down.
[0024] In some possible implementation manners, a marking structure is provided at one end of the trigger structure facing away from the moving contact assembly, and the marking structure is used to indicate the initial position of the trigger structure.
[0025] Since the marking structure can indicate the initial position of the trigger structure, the operator can judge whether the trigger structure is in the initial position by observing the position of the marking structure relative to the housing, and further judge the usage state of the dielectric switch.
[0026] In some possible implementation manners, the dielectric switch further includes a base, the base is fixedly connected to the static contact assembly, and the base is connected to the housing of the circuit breaker.
[0027] Since the base is fixedly connected to the static contact assembly and the base is fixedly connected to the housing of the circuit breaker, the fixed connection between the static contact assembly and the housing can be realized through the base.
[0028] In a second aspect, the present application provides a circuit breaker, including a housing, a main circuit, a circuit board, and the dielectric switch provided in the first aspect and each possible implementation manner of the first aspect. The main circuit is arranged in the housing, and the dielectric switch is electrically connected between the main circuit and the circuit board.
[0029] For the dielectric switch provided in the above second aspect and each possible design of the second aspect, the beneficial effects can be referred to the beneficial effects brought by the above first aspect and each possible implementation manner of the first aspect, which will not be elaborated here. Description of the Drawings
[0030] Figure 1 FIG. is a working principle diagram of a dielectric switch provided by an example of the present application.
[0031] Figure 2 FIG. is a schematic structural diagram of a dielectric switch provided by an example of the present application.
[0032] Figure 3 is Figure 2 a cross-sectional view taken along line A-A in
[0033] Figure 4 is Figure 3 a partially enlarged schematic view at position A in
[0034] Figure 5 FIG. is a schematic structural diagram of a first connecting sleeve provided by an example of the present application.
[0035] Figure 6 FIG. is a schematic structural diagram of a first moving contact provided by an example of the present application.
[0036] Description of Reference Numerals:
[0037] 100, dielectric switch; 110, trigger structure; 120, elastic member; 130, base; 140, moving contact assembly; 141, first moving contact; 142, second moving contact; 143, third moving contact; 144, second connecting sleeve; 150, static contact assembly; 151, first static contact; 1511, first protrusion; 152, second static contact; 153, third static contact; 154, first connecting sleeve; 1541, first through hole; 1542, first limiting structure; 200, main circuit; 300, circuit board. Detailed Embodiments
[0038] To make the objectives, technical solutions, and advantages of the examples of the present application clearer, the technical solutions in the examples of the present application will be clearly and completely described below with reference to the accompanying drawings in the examples of the present application. Obviously, the described examples are a part rather than all of the examples of the present application. All other examples obtained by those of ordinary skill in the art based on the examples of the present application without creative efforts shall fall within the protection scope of the present application.
[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs; the terms used in the specification of this application are only for the purpose of describing specific examples and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification, claims and drawings of this application are intended to cover non-exclusive inclusion.
[0040] As used herein, the mention of "example" means that a particular feature, structure, or characteristic described in connection with the example can be included in at least one example of this application. The phrase "example" appearing in various places in the specification does not necessarily refer to the same example, nor is it an independent or alternative example mutually exclusive with other examples. Those skilled in the art will explicitly and implicitly understand that the examples described herein can be combined with other examples.
[0041] The term "and / or" herein is merely a description of the relationship between associated objects, indicating that there can be three relationships. For example, A and / or B can represent: the existence of A, the simultaneous existence of A and B, and the existence of B. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after.
[0042] The orientation terms appearing in the following description are all the directions shown in the figures, and do not limit the specific structure of the dielectric switch of this application.
[0043] In addition, the terms "first", "second", etc. in the specification, claims or the above-mentioned drawings of this application are used to distinguish different objects, rather than to describe a specific order, and may explicitly or implicitly include one or more of such features.
[0044] In the description of this application, unless otherwise stated, the meaning of "a plurality of" refers to two or more (including two). Similarly, "a plurality of groups" refers to two or more groups (including two groups).
[0045] In the description of this application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, the "connection" or "coupling" of mechanical structures can refer to a physical connection. For example, a physical connection can be a fixed connection, such as a fixed connection through a spacer, such as a fixed connection through screws, bolts or other spacers; a physical connection can also be a detachable connection, such as a snap connection or a snap-fit connection; a physical connection can also be an integral connection, such as a connection by welding, bonding or integrally forming a connection. For those of ordinary skill in the art, the specific meaning of the above terms in this application can be understood according to specific circumstances.
[0046] A circuit breaker is an electrical component that can interrupt a circuit and protect the circuit. To ensure the reliability of the circuit breaker, an interphase insulation performance test is carried out on the circuit breaker.
[0047] In the related art, during the interphase insulation performance test of the circuit breaker, it is necessary to keep the main circuit of the circuit breaker disconnected from the circuit board to reduce the possibility of the detection voltage breaking down the circuit board and ensure the reliability of the circuit board.
[0048] In the prior art, a dielectric switch is usually arranged between the circuit board and the main circuit of the circuit breaker so that the circuit board and the main circuit of the circuit breaker can be disconnected during the interphase insulation performance test of the circuit breaker.
[0049] Based on the structure of the existing dielectric switch, the dielectric switch generally includes two stationary contacts arranged at intervals and a moving contact cooperating with the two stationary contacts. The moving contact of the existing dielectric switch usually moves along the arrangement direction of the two moving contacts, so that the moving contact is separated from the corresponding stationary contact. In the prior art, the volume of the dielectric switch is usually set to be large to ensure the reliability of the dielectric switch.
[0050] Based on the above, an example of the present application provides a dielectric switch and a circuit breaker.
[0051] In order to enable those skilled in the art to better understand the solution of the present application, the dielectric switch and the circuit breaker provided in the example of the present application will be clearly and completely described below with reference to the drawings.
[0052] Exemplarily, an example of the present application provides a circuit breaker. The circuit breaker may include a housing, a main circuit, a circuit board, and a dielectric switch. The main circuit is arranged in the housing, and the dielectric switch is electrically connected between the main circuit and the circuit board.
[0053] The circuit breaker may be a two-phase circuit breaker, a three-phase circuit breaker, a four-phase circuit breaker, etc. In the example of the present application, only the case where the circuit breaker is a three-phase circuit breaker is described. The three-phase circuit breaker may include a phase A, a phase B, and a phase C. The main circuit may include a first main circuit corresponding to the phase A, a second main circuit corresponding to the phase B, and a third main circuit corresponding to the phase C.
[0054] The housing may be made of an insulating material. The housing made of an insulating material can reduce the possibility of the current in the circuit breaker escaping to the outside of the housing and ensure the safety of the circuit breaker.
[0055] Both the dielectric switch and the circuit board may be arranged in the housing, and the dielectric switch is electrically connected between the main circuit and the circuit board.
[0056] The specific setting of the main circuit is similar to the setting method of the main circuit in the prior art, and will not be elaborated in this example of the present application.
[0057] The specific structure and setting method of the circuit board are similar to those of the circuit board in the prior art, and the specific description thereof will not be elaborated in this application example.
[0058] For the specific structure of the dielectric switch, please refer to the relevant description below.
[0059] Since the dielectric switch is disposed between the main circuit and the circuit board, the connection state between the main circuit and the circuit board can be adjusted by adjusting the usage state of the dielectric switch. Specifically, when the dielectric switch is in the on state, the main circuit and the circuit board are in an electrically connected state. When the dielectric switch is in the off state, the main circuit and the circuit board are in a disconnected state. At this time, the circuit breaker can perform the phase-to-phase insulation performance test. Since the main circuit and the circuit board are in a disconnected state, during the process of the circuit breaker performing the phase-to-phase insulation performance test, the detection voltage cannot reach the circuit board via the main circuit, which can reduce the possibility of the circuit board being broken down and ensure the use safety of the circuit board.
[0060] Next, the specific structure of the dielectric switch will be described.
[0061] Exemplarily, this application example provides a dielectric switch. Figure 1 is the working principle diagram of a dielectric switch provided by this application example, Figure 2 is the structural schematic diagram of a dielectric switch provided by this application example, Figure 3 is Figure 2 the cross-sectional view along A-A in Figure 4 is Figure 3 the partial enlarged schematic diagram at A in
[0062] Please refer to Figures 1 to 4 , the dielectric switch 100 can be used for the phase-to-phase insulation performance test of the circuit breaker. The circuit breaker can include a circuit board 300 and a main circuit 200. The circuit board 300 is electrically connected to the main circuit 200. The dielectric switch 100 can include a static contact assembly 150, a moving contact assembly 140, and a trigger structure 110. The static contact assembly 150 is electrically connected to the first wire group. The static contact assembly 150 can include a first static contact 151 and a second static contact 152 that are spaced apart. The moving contact assembly 140 is electrically connected to the second wire group. The moving contact assembly 140 can include a first moving contact 141 and a second moving contact 142 that are spaced apart. The first moving contact 141 can be electrically connected to the first static contact 151, and the second moving contact 142 can be electrically connected to the second static contact 152. The trigger structure 110 is fixedly connected to the moving contact assembly 140. The trigger structure 110 drives the moving contact assembly 140 to rotate relative to the static contact. The rotation direction of the moving contact assembly 140 is tangent to the arrangement direction of the first static contact 151 and the second static contact 152 group, so that the dielectric switch 100 can be switched between the on state and the off state.
[0063] The static contact assembly 150 can be fixedly connected to the inside of the circuit breaker housing. The moving contact assembly 140 is movable relative to the static contact assembly 150. The moving contact assembly 140 can rotate relative to the static contact assembly 150.
[0064] There can be multiple specific implementation manners for the moving contact assembly 140 and the static contact assembly 150.
[0065] For example, the moving contact assembly 140 can be sleeved outside the static contact assembly 150. At this time, both the moving contact assembly 140 and the static contact assembly 150 can be substantially cylindrical. Or, the static contact assembly 150 can be substantially cylindrical. On the basis of ensuring that the moving contact assembly 140 can be sleeved on the static contact assembly 150 and the moving contact assembly 140 can rotate relative to the static contact assembly 150, the moving contact assembly 140 can be prismatic.
[0066] For example, the static contact assembly 150 can also be sleeved outside the moving contact assembly 140. At this time, both the moving contact assembly 140 and the static contact assembly 150 can be substantially cylindrical. Or, the moving contact assembly 140 can be substantially cylindrical. On the basis of ensuring that the static contact assembly 150 can be sleeved on the moving contact assembly 140 and the moving contact assembly 140 can rotate relative to the static contact assembly 150, the static contact assembly 150 can be substantially prismatic. The example of this application only describes by taking the static contact assembly 150 being sleeved outside the moving contact assembly 140 as an example.
[0067] The static contact assembly 150 can include a first static contact 151 and a second static contact 152 which are arranged at intervals. The moving contact assembly 140 includes a first moving contact 141 and a second moving contact 142 which are arranged at intervals. That is, the dielectric switch 100 includes two sets of contacts. Among them, one set of contacts can be electrically connected between the C-phase main circuit 200 of the circuit breaker and the circuit board 300, that is, electrically connected between the third main circuit 200 and the circuit board 300. The other set of contacts can be electrically connected between the A-phase main circuit 200 and the circuit board 300, or can also be electrically connected between the B-phase main circuit 200 and the circuit board 300. That is, the other set of contacts can be electrically connected between the first main circuit 200 and the circuit board 300, or can also be electrically connected between the second main circuit 200 and the circuit board 300. The example of this application does not make specific limitations on this.
[0068] The distance between the first moving contact 141 and the second moving contact 142 meets the use standard of the dielectric switch 100, and the distance between the first static contact 151 and the second static contact 152 also meets the use standard of the dielectric switch 100.
[0069] The number of wires in the first wire group can be equal to the number of stationary contacts in the stationary contact assembly 150, and the wires correspond to the stationary contacts one by one. One end of the first wire group is connected to the stationary contact assembly 150, and the other end of the first wire group can be electrically connected to the main circuit 200 of the circuit breaker, or the other end of the first wire group can also be electrically connected to the circuit board 300.
[0070] Both the moving contact and the stationary contact can be made of materials with good electrical conductivity. For example, copper and copper alloys or other materials. The manufacturing materials of the moving contact and the stationary contact can be the same or different.
[0071] The number of wires in the second wire group can be equal to the number of moving contacts in the moving contact assembly 140, and the wires correspond to the moving contacts one by one. When the first wire group electrically connects the stationary contact assembly 150 and the main circuit 200, the second wire group can electrically connect the moving contact assembly 140 and the circuit board 300. When the first wire group electrically connects the stationary contact assembly 150 and the circuit board 300, the second wire group can electrically connect the moving contact assembly 140 and the main circuit 200. The present application example does not specifically limit the electrical connection manner among the stationary contact assembly 150, the moving contact assembly 140, the main circuit 200, and the circuit board 300.
[0072] The triggering structure 110 can be a knob, an operating rod, or other structures.
[0073] The triggering structure 110 can be integrally formed with the moving contact assembly 140, or the triggering structure 110 can also be connected together by means of clamping, bonding, etc.
[0074] During the rotation of the triggering structure 110, the distance between the triggering structure 110 and the stationary contact assembly 150 may not change, or the triggering structure 110 can also move in the direction towards the stationary contact assembly 150. The present application example does not specifically limit this.
[0075] The triggering structure 110 can cooperate with the housing of the circuit breaker. Taking the connection between the triggering structure 110 and the moving contact assembly 140 as an example, when the dielectric switch 100 is in the on state, the triggering structure 110 can be clamped with the moving contact assembly 140, or there can also be a gap between the triggering structure 110 and the moving contact assembly 140. The present application example does not limit this, as long as it is ensured that the triggering structure 110 can drive the moving contact assembly 140 to rotate relative to the stationary contact assembly 150, so that the contact state between the moving contact assembly 140 and the stationary contact assembly 150 changes.
[0076] Taking the moving contact assembly 140 being substantially cylindrical as an example, the moving contact assembly 140 can rotate relative to the static contact assembly 150 with the axis of the moving contact assembly 140 as the rotation center, so that the first moving contact 141 is separated from the first static contact 151, and the second moving contact 142 is separated from the second static contact 152. The moving contact assembly 140 can rotate counterclockwise relative to the static contact assembly 150, and the moving contact assembly 140 can also rotate clockwise relative to the static contact assembly 150. The examples of the present application do not specifically limit this.
[0077] According to the dielectric switch 100 provided by the examples of the present application, the dielectric switch 100 is connected between the main circuit 200 and the circuit board 300. The static contact assembly 150 and the moving contact assembly 140 can be switched between a conducting state and an open state. In the case of an interphase insulation performance test of the circuit breaker, the dielectric switch 100 can be in an open state to cut off the electrical connection between the main circuit 200 and the circuit board 300. Based on this, the detection voltage of the interphase insulation performance test cannot flow through the main circuit 200 to reach the circuit board 300, reducing the possibility of the circuit board 300 being broken down and ensuring the reliability of the use of the circuit board 300.
[0078] In addition, compared with the prior art, when the moving contact assembly 140 slides along the arrangement direction of the first moving contact 141 and the second moving contact 142, it is necessary to set a relatively large interval between the first moving contact 141 and the second moving contact 142 to ensure the reliability of the use of the dielectric switch 100. In the examples of the present application, the trigger structure 110 is fixedly connected to the moving contact assembly 140. Driven by the trigger structure 110, the moving contact assembly 140 can rotate relative to the static contact assembly 150, and the rotation direction of the moving contact assembly 140 is tangent to the arrangement direction of the first moving contact 141 and the second moving contact 142. In the same volume, the opening distance of the dielectric switch 100 can be made larger, ensuring the reliability of the use of the dielectric switch 100. The dielectric switch 100 provided by the examples of the present application has a more compact structure, improves the utilization rate of the internal space of the dielectric switch 100, and is beneficial to the miniaturization development of the dielectric switch 100 and the circuit breaker.
[0079] Based on the dielectric switch 100 provided by the above examples, Figure 5 is a schematic structural diagram of a first connecting sleeve provided by the examples of the present application, Figure 6 is a schematic structural diagram of a first moving contact provided by the examples of the present application. Please refer to Figures 4 to 6, the static contact assembly 150 may further include a first connecting sleeve 154. The first connecting sleeve 154 is provided with a first through hole 1541 and a second through hole which are spaced apart. The first through hole 1541 and the second through hole are arranged along the extending direction of the first connecting sleeve 154. The first static contact 151 is provided with a first protrusion 1511, and the first protrusion 1511 can pass through the first through hole 1541 to contact the first moving contact 141. The second static contact 152 is provided with a second protrusion, and the second protrusion can pass through the second through hole to contact the second moving contact 142.
[0080] The first connecting sleeve 154 may be made of an insulating material. The manufacturing material of the first connecting sleeve 154 may be the same as or different from the manufacturing material of the housing of the circuit breaker.
[0081] The first connecting sleeve 154 may also be generally prismatic, and the structure of the first static contact 151 is adapted to the structure of the first connecting sleeve 154.
[0082] The first connecting sleeve 154 may be generally cylindrical, and the first static contact 151 may be generally annular. The annular shape may be closed or provided with an opening. The first static contact 151 may be sleeved on the outer side of the first connecting sleeve 154. A first protrusion 1511 may be provided on the side of the first static contact 151 facing the first connecting sleeve 154. When the first static contact 151 is engaged with the first connecting sleeve 154, the first protrusion 1511 may pass through the first through hole 1541 to contact the first moving contact 141.
[0083] Taking the first connecting sleeve 154 being generally cylindrical as an example, the extending direction of the first connecting sleeve 154 refers to the axial direction of the first connecting sleeve 154.
[0084] The shape of the first protrusion 1511 may be the same as or different from the shape of the first through hole 1541. The first protrusion 1511 may be movable within the first through hole 1541, or the first protrusion 1511 may be snap-fitted to the first through hole 1541. The first through hole 1541 and the second through hole may be provided on the same side of the first connecting sleeve 154, or the first through hole 1541 and the second through hole may be oppositely provided on the side wall of the first connecting sleeve 154.
[0085] The structure of the second static contact 152 may be similar to the structure of the first static contact 151, and will not be described in detail here.
[0086] Based on the above, the first through hole 1541 and the second through hole are both provided on the first connecting sleeve 154, the first protrusion 1511 is provided on the first static contact 151, and the first protrusion 1511 can pass through the first through hole 1541 to contact the first moving contact 141. The second protrusion is provided on the second static contact 152, and the second protrusion can pass through the second through hole to contact the second moving contact 142. Based on this, the electrical connection between the static contact assembly 150 and the moving contact assembly 140 can be achieved.
[0087] By providing the first connecting sleeve 154, the creepage distance and electrical clearance between the first static contact 151 and the first moving contact 141, as well as between the second static contact 152 and the second moving contact 142 can be increased, ensuring the safety of use of the dielectric switch 100.
[0088] Based on the dielectric switch 100 provided in the above example, please refer to Figure 4 , the first through hole 1541 is provided at the first position of the first connecting sleeve 154, the second through hole is provided at the second position of the first connecting sleeve 154, and the first position and the second position are arranged oppositely.
[0089] When the first connecting sleeve 154 is in a prismatic shape, taking the first connecting sleeve 154 as a quadrangular prism as an example, the first position and the second position can be respectively arranged on two opposite side walls of the first connecting sleeve 154.
[0090] When the first connecting sleeve 154 is substantially cylindrical, since the first position and the second position are arranged oppositely, the line connecting the first position and the second position can pass through the axis of the first connecting sleeve 154.
[0091] Based on the above, since the first position and the second position are arranged oppositely, the first through hole 1541 is provided at the first position and is matched with the first protrusion 1511 on the first static contact 151, the second through hole is provided at the second position and is matched with the second protrusion on the second static contact 152. Therefore, the positions where the first static contact 151 contacts the first moving contact 141 and the second static contact 152 contacts the second moving contact 142 are arranged oppositely. When the distances between the positions where the first static contact 151 contacts the first moving contact 141 and the second static contact 152 contacts the second moving contact 142 in the dielectric switch 100 are equal, the dielectric switch 100 provided in the example of the present application is smaller in size and more compact in structure, which is beneficial to the miniaturization development of the dielectric switch 100 and the circuit breaker.
[0092] Based on the dielectric switch 100 provided in the above example, please refer to Figure 5 , a first limiting structure 1542 is provided between the first protrusion 1511 and the second protrusion, and the first static contact 151 can abut against the first limiting structure 1542. Alternatively, the second static contact can abut against the first limiting structure. Only the example of the first static contact 151 abutting against the first limiting structure 1542 is shown in the figure.
[0093] The first limiting structure 1542 can be a protrusion structure or a groove structure. The first limiting structure 1542 can also be other structures capable of limiting the first static contact 151 or the second static contact. The example of the present application does not make specific limitations thereto.
[0094] When the static contact component 150 is sleeved outside the moving contact component 140, the first limiting structure 1542 can be implemented in different ways.
[0095] For example, the outer diameters of the first connecting sleeves 154 can be exactly the same. At this time, the first limiting structure can be a protruding structure provided between the first protrusion 1511 and the second protrusion. The first static contact 151 can abut against this protruding structure.
[0096] For example, the outer diameters of the first connecting sleeves 154 can be different. At this time, the first connecting sleeve 154 can include a first sub - sleeve and a second sub - sleeve. The first sub - sleeve can cooperate with the first static contact 151, and the second sub - sleeve can cooperate with the second static contact 152. The outer diameter of the first sub - sleeve can be smaller than the outer diameter of the second sub - sleeve. Based on this, the first limiting structure 1542 can be the connecting surface between the first sub - sleeve and the second sub - sleeve. During the matching process of the first static contact 151 and the first connecting sleeve 154, the first static contact 151 can abut against this connecting surface.
[0097] Or, the outer diameter of the first sub - sleeve can be larger than the outer diameter of the second sub - sleeve. Based on this, the first limiting structure (not shown in the figure) can be the connecting surface between the first sub - sleeve and the second sub - sleeve. During the matching process of the first static contact 151 and the first connecting sleeve 154, the second static contact 152 can abut against this connecting surface.
[0098] Based on the above, since the first limiting structure 1542 is provided on the first connecting sleeve 154 and between the first protrusion 1511 and the second protrusion, during the assembly process of the first static contact 151 and the first connecting sleeve 154, the first static contact 151 can abut against the first limiting structure 1542. Through the cooperation between the first static contact 151 and the first limiting structure 1542, the amplitude of the first static contact 151 shaking relative to the first connecting sleeve 154 can be reduced, ensuring the connection reliability between the first static contact 151 and the first connecting sleeve 154.
[0099] The function of the second static contact 152 cooperating with the first limiting structure is similar to the function of the first static contact 151 cooperating with the first limiting structure 1542, and will not be elaborated in this example of the present application.
[0100] The structure of the moving contact component 140 is similar to the structure of the static contact component 150.
[0101] Exemplarily, the moving contact component 140 can include a second connecting sleeve 144. The specific implementation of the second connecting sleeve 144 is similar to the specific implementation of the first connecting sleeve 154. The implementation of the first moving contact 141 and the second moving contact 142 is similar to the implementation of the first static contact 151 and the second static contact 152, and will not be further expanded in this example of the present application.
[0102] Based on the dielectric switch 100 provided in the above example, the circuit breaker may further include a housing, the housing is provided with a second limiting structure, and the dielectric switch 100 further includes a third limiting structure, and the third limiting structure is fixedly connected to the trigger structure 110. When the second limiting structure is engaged with the third limiting structure, the dielectric switch 100 is in an open state, so that the circuit breaker can perform an insulation performance test. When the second limiting structure is separated from the third limiting structure, the dielectric switch 100 is in a conducting state and the circuit breaker is in an operating state.
[0103] The second limiting structure may be a card slot, and the third limiting structure may be a snap projection. When the dielectric switch 100 is in a conducting state, the card slot and the snap projection may be in a separated state. When the dielectric switch 100 is in an open state, the card slot and the snap projection may be in a engaged state.
[0104] The second limiting structure may be a hook, and the third limiting structure may be a hook. When the dielectric switch 100 is in a conducting state, the hooks may be in a separated state. When the dielectric switch 100 is in an open state, the hooks may be in a engaged state.
[0105] The second engaging structure and the third engaging structure may also be other structures, and the specific implementation manners of the second engaging structure and the third engaging structure are not limited in the examples of the present application.
[0106] When the dielectric switch 100 is in a conducting state, the second limiting structure and the third limiting structure may be in a separated state. When the dielectric switch 100 is in an open state, the second limiting structure and the third limiting structure may be in a engaged state, so that the dielectric switch 100 can be maintained in an open state, and further the dielectric switch 100 can cut off the electrical connection between the main circuit 200 and the circuit board 300 for a long time, facilitating the interphase insulation performance test of the circuit breaker.
[0107] Based on the dielectric switch 100 provided in the above example, please refer to Figure 2 and Figure 3 , the dielectric switch 100 may further include an elastic member 120, one end of the elastic member 120 is connected to the inner wall of the housing, and the other end of the elastic member 120 is connected to the moving contact assembly 140.
[0108] The elastic member 120 may be a spring sheet, a spring or other elastic members 120, as long as it is ensured that the elastic member 120 can provide a force for the reset of the trigger structure 110 to facilitate the trigger structure 110 to return to the initial position.
[0109] One end of the elastic member 120 can abut against the inner wall of the housing, and the other end of the elastic member 120 can be clamped to the moving contact assembly 140, or connected to the moving contact assembly 140 by means of adhesion, fusion connection, etc.
[0110] During the rotation of the trigger structure 110, regardless of whether the distance between the trigger structure 110 and the static contact assembly 150 changes, since the trigger structure 110 is fixedly connected to the moving contact assembly 140, the rotation of the trigger structure 110 can drive the rotation of the moving contact assembly 140. Also, since the moving contact assembly 140 is connected to the elastic member 120, the moving contact assembly 140 can drive the elastic member 120 to deform along the rotation direction of the moving contact assembly 140. The elastic member 120 can generate a force for restoring deformation, and after the clamping connection between the trigger structure 110 and the housing is released, the elastic member 120 can restore deformation under this force and drive the trigger structure 110 and the moving contact assembly 140 back to the initial position.
[0111] Based on the dielectric switch 100 provided in the above example, please refer to Figure 3 And Figure 4 , the static contact assembly 150 may further include a third static contact 153. The moving contact assembly 140 may further include a third moving contact 143, and the third moving contact 143 can be electrically connected to the third static contact 153.
[0112] For the electrical connection relationship among the third moving contact 143, the third static contact 153, the main circuit 200, and the circuit board 300, please refer to the electrical connection method relationship among the first moving contact 141, the first static contact 151, the main circuit 200, and the circuit board 300, and the examples of the present application will not be described in detail here.
[0113] The specific structure of the third moving contact 143 is similar to the specific structures of the first moving contact 141 and the second moving contact 142. The specific structure of the third static contact 153 is similar to the specific structures of the first static contact 151 and the second static contact 152.
[0114] The first connecting sleeve 154 may be provided with a third through hole, and the third static contact 153 may be provided with a third protrusion, and the third protrusion can pass through the third through hole to cooperate with the third moving contact 143.
[0115] The third through hole can be provided at a third position, the third position can be on the same side of the first connecting sleeve 154 as the first position, and the third position can also be on the same side of the first connecting sleeve 154 as the second position. The specific implementation manner of the third position is not limited in the examples of the present application.
[0116] When the first static contact 151 and the second moving contact 142 are connected between the first main circuit 200 and the circuit board 300, and the second static contact 152 and the second moving contact 142 are connected between the third main circuit 200 and the circuit board 300, the third static contact 153 and the second moving contact 142 are connected between the second main circuit 200 and the circuit board 300.
[0117] When the first static contact 151 and the second moving contact 142 are connected between the second main circuit 200 and the circuit board 300, and the second static contact 152 and the second moving contact 142 are connected between the third main circuit 200 and the circuit board 300, the third static contact 153 and the second moving contact 142 are connected between the first main circuit 200 and the circuit board 300.
[0118] The specific connection relationship among the third moving contact 143, the third static contact 153, the main circuit 200, and the circuit board 300 in the examples of the present application is not specifically limited.
[0119] Based on the above, the dielectric switch 100 provided in the examples of the present application is provided with a third static contact 153 and a third moving contact 143 in addition to the first static contact 151, the first moving contact 141, the second static contact 152, and the second moving contact 142. Therefore, according to the dielectric switch 100 provided in the examples of the present application, the three sets of contacts can be simultaneously connected between the three main circuits 200 of the circuit breaker and the circuit board 300, so that when the dielectric switch 100 is in the open state, the electrical connections between the three main circuits 200 of the circuit breaker and the circuit board 300 can be simultaneously cut off, further reducing the possibility that the detection voltage flows through the main circuit 200 to the circuit board 300, and reducing the possibility that the circuit board 300 is punctured.
[0120] Based on the dielectric switch 100 provided in the above examples, a marking structure is provided at one end of the trigger structure 110 away from the moving contact assembly 140, and the marking structure is used to indicate the initial position of the trigger structure 110.
[0121] The marking structure can be at least one of an arrow, text, a pattern, etc.
[0122] Based on the above, since the marking structure can indicate the initial position of the trigger structure 110, the operator can judge whether the trigger structure 110 is in the initial position by observing the position of the marking structure relative to the housing, and further judge the usage state of the dielectric switch 100.
[0123] Based on the dielectric switch 100 provided in the above examples, please refer to Figure 2 , the dielectric switch 100 may further include a base 130, the base 130 is fixedly connected to the static contact assembly 150, and the base 130 is connected to the housing of the circuit breaker.
[0124] The manufacturing material of the base 130 can be the same as or different from that of the housing, as long as it is ensured that the base 130 is made of insulating material.
[0125] The base 130 can be fixedly connected to the housing through connection means such as threaded connection, snap connection, and the cooperation of grooves and protrusions.
[0126] The base 130 can be fixedly connected to the static contact assembly 150 through connection means such as threaded connection, snap connection, and the cooperation of grooves and protrusions. Specifically, the base 130 can be fixedly connected to the first connection sleeve 154 in the static contact assembly 150. The base 130 can also be integrally formed with the first connection sleeve 154. The embodiments of the present application do not specifically limit the connection manner between the base 130, the housing, and the static contact assembly 150.
[0127] Based on the above, since the base 130 is fixedly connected to the static contact assembly 150 and the base 130 is fixedly connected to the housing of the circuit breaker, the fixed connection between the static contact assembly 150 and the housing can be achieved through the base 130.
[0128] Finally, it should be noted that the above embodiments are only specific implementation manners of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.
Claims
1. A dielectric switch, characterized in that, For the insulation performance test of a circuit breaker, the circuit breaker includes a circuit board and a main circuit, and the circuit board is electrically connected to the main circuit. The dielectric switch includes: A static contact assembly electrically connected to a first wire group. The static contact assembly includes a first static contact and a second static contact arranged at intervals. A moving contact assembly electrically connected to a second wire group. The moving contact assembly includes a first moving contact and a second moving contact arranged at intervals. The first moving contact can be electrically connected to the first static contact, and the second moving contact can be electrically connected to the second static contact. A trigger structure fixedly connected to the moving contact assembly. The trigger structure drives the moving contact assembly to rotate relative to the static contact. The rotation direction of the moving contact assembly is tangent to the arrangement direction of the first static contact and the second static contact group, so that the dielectric switch can be switched between a conducting state and a non-conducting state.
2. The dielectric switch according to claim 1, wherein The static contact assembly further includes a first connecting sleeve. The first connecting sleeve is provided with a first through hole and a second through hole arranged at intervals. The first through hole and the second through hole are arranged along the extending direction of the first connecting sleeve. The first static contact is provided with a first protrusion, and the first protrusion can pass through the first through hole to contact the first moving contact. The second static contact is provided with a second protrusion, and the second protrusion can pass through the second through hole to contact the second moving contact.
3. The dielectric switch according to claim 2, wherein The first through hole is arranged at a first position of the first connecting sleeve, and the second through hole is arranged at a second position of the first connecting sleeve. The first position and the second position are oppositely arranged.
4. The dielectric switch according to claim 3, characterized in that, A first limiting structure is arranged between the first protrusion and the second protrusion. The first static contact can abut against the first limiting structure; or, the second static contact can abut against the first limiting structure.
5. The dielectric switch according to claim 1, characterized in that, The circuit breaker further includes a housing. The housing is provided with a second limiting structure. The dielectric switch further includes a third limiting structure, and the third limiting structure is fixedly connected to the trigger structure. When the second limiting structure is engaged with the third limiting structure, the dielectric switch is in a non-conducting state, so that the circuit breaker can perform an insulation performance test. When the second limiting structure is separated from the third limiting structure, the dielectric switch is in a conducting state, and the circuit breaker is in a working state.
6. The dielectric switch according to claim 5, characterized in that, The dielectric switch further includes an elastic member. One end of the elastic member is connected to the inner wall of the housing, and the other end of the elastic member is connected to the moving contact assembly.
7. The dielectric switch according to any one of claims 1 to 6, characterized in that The static contact assembly further includes a third static contact. The moving contact assembly further includes a third moving contact, and the third moving contact can be electrically connected to the third static contact.
8. The dielectric switch according to any one of claims 1 to 6, characterized in that, A marking structure is arranged at one end of the trigger structure facing away from the moving contact assembly, and the marking structure is used to indicate the initial position of the trigger structure.
9. The dielectric switch according to any one of claims 1-6, characterized in that, It further includes a base, the base is fixedly connected to the static contact assembly, and the base is connected to the housing of the circuit breaker.
10. A circuit breaker, characterized in that, It includes a housing, a main circuit, a circuit board, and the dielectric switch according to any one of claims 1 to 9. The main circuit is disposed in the housing, and the dielectric switch is electrically connected between the main circuit and the circuit board.