Circuit breaker
By optimizing the connection method between the conductive components and the terminal blocks, and the design of the bending section, the problem of damage to the zero-sequence current transformer caused by the conductive components was solved, thus achieving miniaturization and cost reduction of the circuit breaker.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DELIXI ELECTRIC
- Filing Date
- 2025-05-23
- Publication Date
- 2026-04-17
AI Technical Summary
In existing circuit breakers, when conductive components are installed through zero-sequence current transformers, the transformers are easily damaged, resulting in larger through-holes, which limits the miniaturization of circuit breakers and increases manufacturing costs.
By designing conductive components and wiring components, at least one centerline of the conductive component is located on the side of the wiring piece's centerline closer to the through hole at the connection point between the conductive component and the wiring piece. The conductive component and the wiring piece are inclined and pass through the through hole away from the connection point to reduce contact with the inner wall of the through hole. Combined with the bending section design, unnecessary connection sections are omitted, and the length of the conductive component is optimized.
This allows conductive components to pass more easily through the through-hole, reduces contact between the conductive components and the inner wall of the through-hole, lowers manufacturing costs, and contributes to the miniaturization and reliability of circuit breakers.
Smart Images
Figure CN224138105U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of low-voltage electrical technology, and more particularly to a circuit breaker. Background Technology
[0002] A circuit breaker is an electrical component that protects a circuit. A circuit breaker generally includes a zero-sequence current transformer and multiple conductive elements, of which at least one conductive element is installed through the zero-sequence current transformer.
[0003] Based on the existing structure of conductive components, in order to ensure that the conductive components can be reliably installed in the zero-sequence current transformer without causing damage to the zero-sequence current transformer, the diameter of the through hole of the zero-sequence current transformer is usually set to be large, which is not conducive to the miniaturization of circuit breakers. Utility Model Content
[0004] This application provides a circuit breaker that, during the assembly process, reduces the likelihood of contact between the conductive parts, terminals, and the inner wall of the through hole, making it easier for the terminals and conductive parts to pass through the through hole. This is beneficial for the miniaturization of the circuit breaker and reduces its manufacturing cost.
[0005] In a first aspect, this application provides a circuit breaker, which includes a zero-sequence current transformer, a conductive component, and a first wiring assembly. The zero-sequence current transformer has a through hole. The conductive component passes through the through hole, and the first wiring assembly is located on the side of the conductive component extending out of the zero-sequence current transformer. The conductive component is located on the side of the first wiring assembly facing the zero-sequence current transformer, and the first wiring assembly electrically connects the conductive component to a power supply line.
[0006] The conductive component includes multiple spaced conductive elements, and the first wiring component includes multiple spaced wiring pieces. The center line of at least one of the multiple conductive elements is located on the side of the center line of the wiring piece near the through hole.
[0007] In this application example, since the first wiring assembly can electrically connect the conductive component and the power supply line, the circuit breaker and the power supply line can be electrically connected through the first wiring assembly.
[0008] The conductive assembly includes multiple conductive elements spaced apart, and the first wiring assembly includes multiple terminal blocks spaced apart. The conductive elements are connected to the side of the terminal blocks facing the zero-sequence current transformer. Compared to the prior art, where all conductive elements are connected to the center of the terminal blocks, the terminal blocks need to be tilted into the through-hole during the insertion of the terminal blocks and conductive elements, causing the connection point between the terminal blocks and conductive elements to be closer to the tilted direction, thus making it easier for the terminal blocks and conductive elements to contact the inner wall of the through-hole. In this example, at the connection point between the conductive element and the terminal block, at least one conductive element's centerline is located on the side of the terminal block's centerline closer to the through-hole. During the insertion of the conductive element and terminal block into the through-hole, the conductive element and terminal block are tilted away from the connection point, so that the connection point is located in a more central position within the through-hole. This reduces the possibility of the conductive element / terminal block contacting the inner wall of the through-hole, making it easier for the terminal blocks and conductive elements to pass through the through-hole. In this application example, the through hole of the zero-sequence current transformer is relatively large, which allows the connecting piece and the conductive part to be reliably installed in the through hole, which is conducive to the miniaturization of the circuit breaker.
[0009] Furthermore, compared to the prior art where the conductive element is connected to the middle of the terminal block, in this application example, at the connection point between the conductive element and the terminal block, at least one of the conductive elements' center lines is located on the side of the terminal block's center line near the through hole, making the conductive element shorter, saving material for the conductive element, and reducing the manufacturing cost of the circuit breaker.
[0010] In some possible implementations, along the direction of the terminal block toward the conductive element, at the connection position between the conductive element and the terminal block, at least one sidewall of the conductive element near the through hole is flush with the sidewall of the terminal block near the through hole.
[0011] In this application example, at the connection between the connector and the conductive element, the sidewall of the conductive element facing the through hole is flush with the sidewall of the connector near the through hole. Compared to the sidewall of the conductive element facing the through hole protruding from the sidewall of the connector near the through hole, this reduces the possibility of the conductive element contacting the inner wall of the through hole and reduces the possibility of the conductive element scratching the inner wall of the through hole.
[0012] In some possible implementations, the circuit breaker includes a first overcurrent protection component, a conductive component includes a first conductive element, and a first wiring component includes a first terminal block. The first overcurrent protection component is disposed on the side of the first conductive element opposite to the first terminal block. The first conductive element includes a first connecting section, a first bent section, and a second connecting section. The first connecting section is connected to the first overcurrent protection component, and the first bent section is connected to the first connecting section. The first bent section bends along the first connecting section toward the first terminal block and passes through a through hole. The second connecting section is connected to the end of the first bent section away from the first connecting section, and the end of the second connecting section opposite to the first bent section is connected to the first terminal block. The second connecting section bends along the first bent section toward the first terminal block.
[0013] In this application example, when the circuit breaker is in an overloaded operating state, the first overcurrent protection component can operate, causing other structures of the circuit breaker to operate, so that the circuit breaker is in a tripped state, providing safety protection for the circuit.
[0014] The first conductive component includes a first connecting section, a first bending section, and a second connecting section. The first connecting section connects the first overcurrent protection component to the first bending section, and the first bending section passes through a through hole. The second connecting section connects the first bending section to the first connecting piece. Therefore, the first overcurrent protection component, the first connecting section, the first bending section, the second connecting section, and the first connecting piece can cooperate to form the internal circuit of the circuit breaker. Since the first connecting piece can be connected to the power supply line, the internal circuit of the circuit breaker can be electrically connected to the power supply line.
[0015] Compared to the prior art where an overcurrent protection connection section is provided at the first connection section of the first conductive member and faces the first overcurrent protection component, and the overcurrent protection connection section is perpendicular to the first connection section, in this application example, the first connection section can be bent along the direction away from the bottom wall of the housing and directly connected to the first overcurrent protection component. This eliminates the need for the overcurrent protection connection section, reduces the length of the first conductive member, lowers the manufacturing cost of the circuit breaker, and also makes the length of the circuit breaker shorter along the direction from the first overcurrent protection component toward the zero-sequence current transformer, which is beneficial to the miniaturization of the circuit breaker.
[0016] Compared to the prior art where a connecting segment facing the first terminal piece is provided at the second connecting segment of the first conductive member, and this connecting segment is perpendicular to the second connecting segment, in this application example, the second connecting segment can be bent along the direction towards the bottom wall of the housing and directly connected to the first terminal piece. This eliminates the need for the connecting segment, reduces the length of the first conductive member, lowers the manufacturing cost of the circuit breaker, and also makes the length of the circuit breaker along the direction from the first overcurrent protection component towards the zero-sequence current transformer shorter, which is beneficial to the miniaturization of the circuit breaker.
[0017] In some possible implementations, the second connecting segment is bent in the direction toward the first terminal block, the second connecting segment is arc-shaped, or the second connecting segment includes multiple segments arranged at an angle.
[0018] When the second connecting segment bends toward the first terminal piece, compared to the second connecting segment being perpendicular to the first bending segment, the example of this application sets the second connecting segment to be arc-shaped, or the second connecting segment includes multiple segments set at an angle. During the process of the first conductive element passing through the through hole, the connection between the second connecting segment and the first bending segment is less likely to contact the inner wall of the through hole, making it easier for the first conductive element to pass through the through hole.
[0019] In some possible implementations, the first bend is inserted along the direction of the through hole, and the size of the first bend is approximately equal to the size of the through hole.
[0020] In this application example, the size of the first bending section is set to be approximately equal to the size of the through hole along the direction in which the first bending section passes through the through hole. This allows the circuit breaker to have a smaller size in the direction in which the first bending section passes through the through hole, which is beneficial for the miniaturization of the circuit breaker.
[0021] In some possible implementations, the first connector has a first fixing hole, the center line of which is located on the side of the center line of the first connector away from the through hole.
[0022] In this application example, regardless of whether the center line of the first conductive element is located on the side of the center line of the first connecting piece closer to the through hole, the center line of the first fixing hole can be located on the side of the first connecting piece away from the through hole, so that the first fixing hole and the connection point of the first conductive element and the first connecting piece are spaced apart, and the force is applied to the first connecting piece from different positions, reducing the amplitude of the first connecting piece shaking inside the circuit breaker, ensuring the reliability of the connection between the first connecting piece and the power supply line, and thus ensuring the reliability of the circuit breaker.
[0023] In some possible implementations, the circuit breaker further includes a second overcurrent protection component, which is spaced apart from the first overcurrent protection component. The conductive component also includes a second conductive element, which is spaced apart from the first conductive element, with one end of the second conductive element connected to the second overcurrent protection component. The first wiring component further includes a second connecting piece, which is spaced apart from the first connecting piece, and the other end of the second connecting piece is connected to the second conductive element.
[0024] In this example, the second conductive element connects the second overcurrent protection component and the second terminal block, enabling the connection of the internal circuit of the circuit breaker. The second terminal block can be connected to the power supply line, achieving electrical connection between the internal circuit of the circuit breaker and the power supply line. The second overcurrent protection component is spaced apart from the first overcurrent protection component, ensuring insulation performance between different phases within the circuit breaker and reducing the possibility of internal circuit breakers. Similarly, the spaced arrangement of the second conductive element and the first conductive element ensures insulation performance between different phases within the circuit breaker, reducing the possibility of internal circuit breakers. Likewise, the spaced arrangement of the second terminal block and the first terminal block ensures insulation performance between different phases within the circuit breaker, reducing the possibility of internal circuit breakers.
[0025] In some possible implementations, the line connecting the center line of the second terminal block and the center line of the second conductive element is parallel to the center line of the through hole.
[0026] In this application example, the line connecting the center line of the second terminal piece and the center line of the second conductive element is parallel to the center line of the through hole, which makes the length of the second conductive element smaller, which helps to save the manufacturing cost of the second conductive element and thus reduce the manufacturing cost of the circuit breaker.
[0027] In some possible implementations, the circuit breaker also includes a mounting bracket, at least part of which is located within a through hole. The mounting bracket includes multiple spaced mounting slots through which multiple conductive elements pass.
[0028] In this application example, by setting a mounting bracket, and the mounting bracket including multiple spaced mounting slots, multiple conductive components in the conductive assembly can be installed in different mounting slots, which can improve the insulation performance between different conductive components and reduce the possibility of internal short circuits in the circuit breaker.
[0029] With the installation of mounting brackets, insulating sleeves may not be required on the outside of conductive components, reducing the manufacturing cost of the circuit breaker. Alternatively, insulating sleeves may be provided on the outside of conductive components. The cooperation between the mounting brackets and the insulating sleeves can further improve the insulation performance between different conductive components, thereby further ensuring the reliability of the circuit breaker. Attached Figure Description
[0030] Figure 1 This is a schematic diagram of the structure of a circuit breaker provided as an example of this application.
[0031] Figure 2 This is a schematic diagram of the structure of a partial circuit breaker provided as an example of this application.
[0032] Figure 3 This is a schematic diagram illustrating the interaction of a first connecting piece, a first conductive element, and a first overcurrent protection component, as provided in this application example.
[0033] Figure 4 This is a schematic diagram illustrating the structure of a first conductive element and a first connecting piece, as provided in this application.
[0034] Figure 5 This is a schematic diagram illustrating the interaction of a second terminal block, a second conductive element, and a second overcurrent protection component, as provided in this application example.
[0035] Explanation of reference numerals in the attached figures:
[0036] 100. Circuit breaker; 110. Housing; 120. Conductive component; 121. First conductive element; 1211. First connecting section; 1212. First bending section; 1213. Second connecting section; 122. Second conductive element; 123. Third conductive element; 124. Fourth conductive element; 130. First wiring assembly; 131. First connecting piece; 1311. First fixing hole; 132. Second connecting piece; 1321. Second fixing hole; 133. Third connecting piece; 134. Fourth connecting piece; 140. Zero-sequence current transformer; 151. First overcurrent protection assembly; 152. Second overcurrent protection assembly; 160. Second wiring assembly; 161. Fifth connecting piece; 162. Sixth connecting piece; 163. Seventh connecting piece; 164. Eighth connecting piece; 170. Mounting bracket. Detailed Implementation
[0037] To make the purpose, technical solutions, and advantages of the examples in this application clearer, the technical solutions in the examples of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described examples are only a part of the examples in this application, not all of them. Based on the examples in this application, all other examples obtained by those skilled in the art without inventive effort are within the scope of protection of this application.
[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terms used herein in the description of the application are for the purpose of describing particular examples only and are not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the description, claims and drawings of this application are intended to cover non-exclusive inclusion.
[0039] In this document, the term "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 appearance of the phrase "example" in various places in the specification does not necessarily refer to the same example, nor is it a separate or alternative example mutually exclusive with other examples. It will be explicitly and implicitly understood by those skilled in the art that the examples described herein can be combined with other examples.
[0040] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists, A and B exist simultaneously, or B exists. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.
[0041] The directional terms used in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of the circuit breaker in this application.
[0042] Furthermore, the terms "first," "second," etc., in the specification and claims of this application or in the aforementioned drawings are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.
[0043] In the description of this application, unless otherwise stated, "multiple" means two or more (including two), and similarly, "multiple groups" means two or more (including two groups).
[0044] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, "connection" or "joining" in mechanical structures can refer to a physical connection, such as a fixed connection, for example, a connection fixed by a partition, such as a connection fixed by screws, bolts, or other partitions; a physical connection can also be a detachable connection, such as a snap-fit or interlocking connection; a physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0045] To enable those skilled in the art to better understand the present application, the circuit breaker provided in the example of the present application will be clearly and completely described below with reference to the accompanying drawings.
[0046] For example, this application provides a circuit breaker.
[0047] This application provides a circuit breaker. Figure 1 This application provides a schematic diagram of the structure of a circuit breaker as an example. Figure 2 For a schematic diagram of a partial circuit breaker provided as an example in this application, please refer to... Figure 1 and Figure 2The circuit breaker 100 includes a zero-sequence current transformer 140, a conductive component 120, and a first wiring assembly 130. The zero-sequence current transformer 140 has a through hole. The conductive component 120 passes through the through hole. The first wiring assembly 130 is located on the side of the conductive component 120 that extends out of the zero-sequence current transformer 140. The conductive component 120 is located on the side of the first wiring assembly 130 facing the zero-sequence current transformer 140. The first wiring assembly 130 electrically connects the conductive component 120 to the power supply line.
[0048] The conductive component 120 includes a plurality of spaced conductive elements, and the first wiring component 130 includes a plurality of spaced wiring pieces. The center line of at least one of the conductive elements is located on the side of the center line of the wiring piece that is close to the through hole.
[0049] The circuit breaker 100 can be a two-phase circuit breaker, a three-phase circuit breaker, a four-phase circuit breaker, etc. In this application example, the circuit breaker 100 is described as a three-phase circuit breaker, which includes phase A, phase B, phase C and phase N.
[0050] The circuit breaker 100 includes a housing 110, a zero-sequence current transformer 140, a conductive component 120, a first wiring component 130, and other structures all installed inside the housing 110.
[0051] The zero-sequence current transformer 140 can be a cylindrical structure with through holes, and the cylindrical structure can be cylindrical, prismatic, etc.
[0052] The conductive component 120 may include a plurality of spaced-apart conductive elements. Exemplarily, the conductive component 120 may include two, three, four, or even more spaced-apart conductive elements. The conductive elements may be bent copper busbars. An insulating layer may be provided on the outer side of the conductive elements. The insulating layer may be an insulating tape, an insulating sleeve, or other structure. This application example does not impose specific limitations on this.
[0053] The first wiring assembly 130 includes a plurality of spaced wiring pieces, the number of which is equal to the number of conductive elements, and each wiring piece corresponds to a conductive element.
[0054] Some conductive elements in the conductive assembly 120 can be connected to the overcurrent protection component in the circuit breaker 100 on the side opposite to the first wiring assembly 130, and some conductive elements can be electrically connected to the terminal piece in the second wiring assembly 160 on the side opposite to the first wiring assembly 130. Examples of this application will not be described in detail.
[0055] The conductive component and the terminal block can be integrally molded, or they can be fixedly connected by welding, threaded connection, or other methods.
[0056] During the assembly of circuit breaker 100, the conductive parts and terminals are usually assembled first, and then the connected conductive parts and terminals are inserted through the through holes.
[0057] The second wiring assembly 160 includes a plurality of spaced-apart terminals, the number of which is equal to the number of conductive elements, and each terminal corresponds to one conductive element. The second wiring assembly 160 is directly or indirectly connected to the side of the conductive assembly 120 opposite to the first wiring assembly 130.
[0058] In this application example, at the connection position between the conductive element and the terminal block, only one conductive element's center line can be located on the side of the terminal block's center line near the through hole, or two, three, or even all conductive elements' center lines can be located on the side of the terminal block's center line near the through hole.
[0059] At the connection point between the conductive element and the terminal block, at least one conductive element can be completely located on the side of the terminal block's centerline near the through hole, or a portion of the conductive element can be located on the side of the terminal block's centerline near the through hole, as long as the centerline of at least one conductive element is located on the side of the terminal block's centerline near the through hole. In this case, there is an angle between the connection between the centerline of the terminal block and the centerline of the conductive element and the centerline of the through hole. At the connection point between the conductive element and the terminal block, the connection between the centerline of the terminal block and the centerline of the conductive element can also be parallel to the centerline of the through hole; this application does not impose specific limitations on this.
[0060] In this application example, since the first wiring assembly 130 can electrically connect the conductive assembly 120 and the power supply line, the circuit breaker 100 and the power supply line can be electrically connected through the first wiring assembly 130.
[0061] The conductive assembly 120 includes a plurality of conductive elements spaced apart, and the first wiring assembly 130 includes a plurality of wiring pieces spaced apart. The conductive elements are connected to the side of the wiring pieces facing the zero-sequence current transformer 140. Compared to the prior art, where all conductive elements are connected to the center of the wiring pieces, the wiring pieces need to be tilted into the through hole during the insertion of the wiring pieces and conductive elements, causing the connection point between the wiring pieces and conductive elements to be closer to the tilted direction, thus making it easier for the wiring pieces and conductive elements to contact the inner wall of the through hole. In this example, at the connection point between the conductive element and the wiring piece, at least one conductive element's centerline is located on the side of the wiring piece's centerline closer to the through hole. During the insertion of the conductive element and wiring piece into the through hole, the conductive element and wiring piece are tilted away from the connection point, so that the connection point is located in a more central position within the through hole. This reduces the possibility of the conductive element / wiring piece contacting the inner wall of the through hole, making it easier for the wiring pieces and conductive elements to pass through the through hole. In this application example, the through hole of the zero-sequence current transformer 140 is not large, which allows the connecting piece and the conductive element to be reliably installed in the through hole, which is beneficial to the miniaturization of the circuit breaker 100.
[0062] Furthermore, compared to the prior art where the conductive element is connected to the middle of the terminal block, in this application example, at the connection point between the conductive element and the terminal block, at least one of the conductive elements' center lines is located on the side of the terminal block's center line near the through hole, making the conductive element shorter, saving material for the conductive element, and reducing the manufacturing cost of the circuit breaker 100.
[0063] Based on the circuit breaker 100 provided in the above example, along the direction of the terminal block toward the conductive element, at the connection position between the conductive element and the terminal block, at least one side wall of the conductive element near the through hole is flush with the side wall of the terminal block near the through hole.
[0064] The sidewall of the conductive element away from the through hole can be located on the side of the center line of the connector closer to the through hole, or it can be flush with the center of the connector. Alternatively, the sidewall of the conductive element away from the through hole can be located on the side of the center line of the connector away from the through hole. This application does not impose any specific limitations on this.
[0065] In this application example, at the connection between the connector and the conductive element, the sidewall of the conductive element facing the through hole is flush with the sidewall of the connector near the through hole. Compared to the sidewall of the conductive element facing the through hole protruding from the sidewall of the connector near the through hole, this reduces the possibility of the conductive element contacting the inner wall of the through hole and reduces the possibility of the conductive element scratching the inner wall of the through hole.
[0066] Based on the circuit breaker 100 provided in the above example, Figure 3 This is a schematic diagram illustrating the interaction of a first terminal block, a first conductive element, and a first overcurrent protection assembly, as provided in this application. Figure 4For an example structural schematic diagram of the first conductive element and the first terminal piece provided in this application, please refer to... Figures 2-4 The circuit breaker 100 includes a first overcurrent protection component 151, the conductive component 120 includes a first conductive element 121, and the first wiring component 130 includes a first connecting piece 131. The first overcurrent protection component 151 is disposed on the side of the first conductive element 121 opposite to the first connecting piece 131. The first conductive element 121 includes a first connecting section 1211, a first bending section 1212, and a second connecting section 1213. The first connecting section 1211 is connected to the first overcurrent protection component 151, and the first bending section 1212 is connected to the first connecting section 1211. The first bending section 1212 bends along the first connecting section 1211 toward the first connecting piece 131 and passes through a through hole. The second connecting segment 1213 is connected to the end of the first bending segment 1212 away from the first connecting segment 1211. The end of the second connecting segment 1213 away from the first bending segment 1212 is connected to the first terminal piece 131. The second connecting segment 1213 bends along the first bending segment 1212 toward the first terminal piece 131.
[0067] For example, the first overcurrent protection component 151, the first conductive element 121, and the first terminal block 131 correspond to the A-phase circuit in the circuit breaker 100.
[0068] The second wiring assembly 160 includes a fifth wiring piece 161 and a second wiring piece 132 connected to the side of the first overcurrent protection assembly 151 away from the first conductive element 121.
[0069] The first overcurrent protection component 151 may consist only of a first electrical connector. The first overcurrent protection component 151 includes a first bimetallic strip and a first thermal element. A first conductive element 121 may be connected to the first bimetallic strip, or it may be connected to the first thermal element, or it may be connected to both the first bimetallic strip and the first thermal element simultaneously. The structure of the first electrical connector may be the same as or different from the structure of the first thermal element. This application example does not impose any limitations in this regard.
[0070] The first heating element may be made of copper or a copper alloy. The first bimetallic strip may be made of two metals or alloys with different coefficients of thermal expansion, and the materials used to make the first bimetallic strip include, but are not limited to, nickel, manganese, copper, iron, etc.
[0071] The first conductive element 121 and the first bimetallic strip can be fixedly connected together by welding, bonding, riveting or other means.
[0072] When the circuit breaker 100 is in an overload working state, the first thermal element can provide heat to the first bimetallic strip, causing the first bimetallic strip to bend due to heat. The bent first bimetallic strip can directly or indirectly abut against the operating mechanism of the circuit breaker 100, causing the circuit breaker 100 to trip and protecting the circuit in which the circuit breaker 100 is located.
[0073] The first conductive element 121 includes a first connecting section 1211, a first bent section 1212, and a second connecting section 1213. One end of the first connecting section 1211 is connected to the first overcurrent protection component 151, and the first connecting section 1211 extends along the arrangement direction of different phases of the circuit breaker 100. At a position where the first connecting section 1211 extends to a through-hole into the zero-sequence current transformer 140, the first connecting section 1211 bends in the direction toward the first terminal piece 131 to form the first bent section 1212. After the first bent section 1212 extends out of the through-hole, it extends in the direction toward the first terminal piece 131 to form the second connecting section 1213, and one end of the second connecting section 1213 opposite to the first bent section 1212 is connected to the first terminal piece 131. The first connecting section 1211, the first bent section 1212, and the second connecting section 1213 cooperate to form a U-shaped structure.
[0074] The first connecting segment 1211 can be directly connected to the first overcurrent protection component 151, or it can be connected to the first overcurrent protection component 151 through a connecting structure. The first connecting segment 1211 can be directly connected to the first terminal block 131, or it can be connected to the first terminal block 131 through a connecting structure.
[0075] Along the direction from the first overcurrent protection component 151 toward the zero-sequence current transformer 140, the length of the first bending section 1212 can be equal to the size of the through hole, or the length of the first bending section 1212 can be greater than the size of the through hole. This application example does not impose specific limitations on this.
[0076] In this application example, when the circuit breaker 100 is in an overloaded working state, the first overcurrent protection component 151 can operate, driving other structures of the circuit breaker 100 to operate, so that the circuit breaker 100 is in a tripped state, providing safety protection for the circuit.
[0077] The first conductive element 121 includes a first connecting section 1211, a first bending section 1212, and a second connecting section 1213. The first connecting section 1211 connects the first overcurrent protection component 151 to the first bending section 1212, which passes through a through hole. The second connecting section 1213 connects the first bending section 1212 to the first terminal piece 131. Therefore, the first overcurrent protection component 151, the first connecting section 1211, the first bending section 1212, the second connecting section 1213, and the first terminal piece 131 can cooperate to form the internal circuit of the circuit breaker 100. Since the first terminal piece 131 can be connected to the power supply line, an electrical connection between the internal circuit of the circuit breaker 100 and the power supply line can be achieved.
[0078] Compared to the prior art where an overcurrent protection connection section is provided at the first connection section 1211 of the first conductive member and faces the first overcurrent protection component, and the overcurrent protection connection section is perpendicular to the first connection section 1211, in this application example, the first connection section 1211 can be bent in the direction away from the bottom wall of the housing 110 and directly connected to the first overcurrent protection component 151. This eliminates the need for the overcurrent protection connection section, reduces the length of the first conductive member 121, lowers the manufacturing cost of the circuit breaker 100, and also makes the length of the circuit breaker 100 shorter in the direction from the first overcurrent protection component 151 toward the zero-sequence current transformer 140, which is beneficial to the miniaturization of the circuit breaker 100.
[0079] Compared to the prior art where a connecting segment facing the first terminal piece is provided at the second connecting segment of the first conductive member, and this connecting segment is perpendicular to the second connecting segment, in this application example, the second connecting segment 1213 can be bent along the direction towards the bottom wall of the housing 110 and directly connected to the first terminal piece 131. This eliminates the need for the connecting segment, reduces the length of the first conductive member 121, lowers the manufacturing cost of the circuit breaker 100, and also makes the length of the circuit breaker 100 shorter along the direction from the first overcurrent protection component 151 towards the zero-sequence current transformer 140, which is beneficial to the miniaturization of the circuit breaker 100.
[0080] Based on the circuit breaker 100 provided in the example above, please refer to... Figures 1-4 The second connecting segment 1213 is bent in the direction toward the first terminal piece 131, and the second connecting segment 1213 is arc-shaped, or the second connecting segment 1213 includes a plurality of segments arranged at an angle.
[0081] When the second connecting segment 1213 is arc-shaped, the second connecting segment 1213 can be circular arc-shaped, the second connecting segment 1213 can also be elliptical arc-shaped, or a combination of circular arc-shaped and elliptical arc-shaped. This application example does not impose specific limitations on this.
[0082] When the second connecting segment 1213 includes multiple segments arranged at an angle, the second connecting segment 1213 may include two segments, three segments, four segments, or even more segments. This application example does not impose specific limitations on this. The segments may be straight lines, or they may include both straight lines and curved lines.
[0083] When the second connecting segment 1213 is bent toward the first terminal piece 131, compared to the second connecting segment 1213 being perpendicular to the first bent segment 1212, the example of this application sets the second connecting segment 1213 to be arc-shaped, or the second connecting segment 1213 includes multiple segments set at an angle. During the process of the first conductive member 121 passing through the through hole, the connection between the second connecting segment 1213 and the first bent segment 1212 is less likely to contact the inner wall of the through hole, so that the first conductive member 121 can be passed through the through hole more easily.
[0084] Based on the circuit breaker 100 provided in the above example, the first bending section 1212 is inserted through the through hole in the direction of the through hole, and the size of the first bending section 1212 is basically equal to the size of the through hole.
[0085] The first bending segment 1212 is inserted into the through hole along the direction of the first bending segment 1212. The size of the first bending segment 1212 is basically equal to the size of the through hole. This can be understood as the first bending segment 1212 being larger than the size of the through hole along the direction of the first bending segment 1212 being inserted into the through hole, and the difference between the size of the first bending segment 1212 and the size of the through hole being less than or equal to 3 mm.
[0086] In this application example, the size of the first bending section 1212 is set to be approximately equal to the size of the through hole along the direction in which the first bending section 1212 passes through the through hole. This allows the circuit breaker 100 to have a smaller size in the direction in which the first bending section 1212 passes through the through hole, which is beneficial for the miniaturization of the circuit breaker 100.
[0087] Based on the circuit breaker 100 provided in the example above, please refer to... Figure 3 and Figure 4 The first connector 131 is provided with a first fixing hole 1311, and the center line of the first fixing hole 1311 is located on the side of the center line of the first connector 131 away from the through hole.
[0088] The first fixing hole 1311 can be a smooth hole or a threaded hole, as long as the connector can be inserted through the first fixing hole 1311 to achieve a reliable connection between the first connector 131 and the housing 110.
[0089] The first conductive element 121 can apply a force toward the bottom wall of the housing 110 to the first connecting piece 131. At the connection between the first conductive element 121 and the first connecting piece 131, regardless of whether the center line of the first conductive element 121 is located on the side of the center line of the first connecting piece 131 that is closer to the through hole, the center line of the first fixing hole 1311 can be located on the side of the first connecting piece 131 that is away from the through hole.
[0090] The center line of the first fixing hole 1311 is located on the side of the center line of the first connector 131 away from the through hole. This can mean that all the first fixing holes 1311 are located on the side of the center line of the first connector 131 away from the through hole, or it can mean that some of the first fixing holes 1311 are located on the side of the center line of the first connector 131 away from the through hole. This application example does not make specific limitations in this regard.
[0091] In this application example, regardless of whether the center line of the first conductive element 121 is located on the side of the center line of the first connecting piece 131 closer to the through hole, the center line of the first fixing hole 1311 can be located on the side of the first connecting piece 131 away from the through hole. This allows the first fixing hole 1311 to be spaced apart from the connection point between the first conductive element 121 and the first connecting piece 131, thus applying force to the first connecting piece 131 from different positions. This reduces the amplitude of the first connecting piece 131's shaking inside the circuit breaker 100, ensuring the reliability of the connection between the first connecting piece 131 and the power supply line, and thereby ensuring the reliability of the circuit breaker 100 in use.
[0092] Based on the circuit breaker 100 provided in the above example, Figure 5 A schematic diagram illustrating the interaction of the second terminal block, the second conductive element, and the second overcurrent protection assembly, as provided in this application, is shown below. Figure 1 , Figure 2 as well as Figure 5 The circuit breaker 100 further includes a second overcurrent protection component 152, which is spaced apart from the first overcurrent protection component 151. The conductive component 120 further includes a second conductive element 122, which is spaced apart from the first conductive element 121, and one end of the second conductive element 122 is connected to the second overcurrent protection component 152. The first wiring component 130 further includes a second connecting piece 132, which is spaced apart from the first connecting piece 131, and the other end of the second connecting piece 132 is connected to the second conductive element 122.
[0093] The second overcurrent protection assembly 152 may consist only of a second electrical connector. The second overcurrent protection assembly 152 includes a cooperating second thermal element and a second bimetallic strip, wherein a portion of the second thermal element extends toward the zero-sequence current transformer 140, allowing the second conductive element 122 to be connected to the side of the second thermal element facing the bottom wall of the housing 110. The structure of the second electrical connector may be the same as or different from the structure of the second thermal element. This application example does not impose limitations in this regard.
[0094] Along the direction from the second overcurrent protection component 152 toward the second conductive element 122, the second conductive element 122 is generally in the shape of a straight plate. The line connecting the center line of the second overcurrent protection component 152, the center line of the second conductive element 122, and the center line of the second terminal block is parallel to the center line of the through hole. The second conductive element 122 can also be bent in the direction toward the first conductive element 121, or the second conductive element 122 can also be bent in the direction away from the first conductive element 121.
[0095] The second conductive element 122 includes a third connecting section, a second bent section, and a fourth connecting section. The second bent section connects the third connecting section and the fourth connecting section. The end of the third connecting section opposite to the second bent section is connected to the second overcurrent protection component 152, and the end of the fourth connecting section opposite to the second bent section is connected to the second terminal piece 132. The second bent section is bent in a direction away from the bottom wall of the housing 110.
[0096] For example, the second overcurrent protection component 152, the second conductive element 122, and the second terminal block 132 correspond to the B-phase circuit in the circuit breaker 100.
[0097] The second wiring assembly 160 includes a sixth wiring piece 162, which is directly or indirectly connected to the side of the second overcurrent protection assembly 152 away from the second conductive element 122.
[0098] The second connector 132 is provided with a second fixing hole 1321. The center line of the second fixing hole 1321 can be located on the line connecting the center line of the second overcurrent protection component 152, the center line of the second conductive element 122 and the center line of the second connector plate. The center line of the second fixing hole 1321 can also be spaced apart from the line connecting the center line of the second overcurrent protection component 152, the center line of the second conductive element 122 and the center line of the second connector plate. This application example does not impose specific limitations on this.
[0099] In this example, the second conductive element 122 connects the second overcurrent protection component 152 and the second terminal block 132, enabling the connection of the internal circuit of the circuit breaker 100. The second terminal block 132 can be connected to the power supply line, realizing the electrical connection between the internal circuit of the circuit breaker 100 and the power supply line. The second overcurrent protection component 152 and the first overcurrent protection component 151 are spaced apart, which can ensure the insulation performance between different phases within the circuit breaker 100 and reduce the possibility of an internal circuit break. The second conductive element 122 and the first conductive element 121 are spaced apart, which can ensure the insulation performance between different phases within the circuit breaker 100 and reduce the possibility of an internal circuit break. The second terminal block 132 and the first terminal block 131 are spaced apart, which can ensure the insulation performance between different phases within the circuit breaker 100 and reduce the possibility of an internal circuit break.
[0100] Based on the circuit breaker 100 provided in the example above, please refer to... Figure 5 The line connecting the center line of the second terminal piece 132 and the center line of the second conductive element 122 is parallel to the center line of the through hole.
[0101] The line connecting the center line of the second connecting piece 132 and the center line of the second conductive element 122 is parallel to the center line of the through hole. This can be achieved only at the connection point between the second connecting piece 132 and the second conductive element 122, where the line connecting the center lines of the second connecting piece 132 and the second conductive element 122 is parallel to the center line of the through hole. Alternatively, along the direction of the second overcurrent protection component 152 toward the second conductive element 122, the second conductive element 122 can be configured to be approximately a straight plate, such that the line connecting the center lines of the second connecting piece 132 and the second conductive element 122 is parallel to the center line of the through hole. This application example does not impose specific limitations on this.
[0102] In this application example, the line connecting the center line of the second terminal piece 132 and the center line of the second conductive element 122 is parallel to the center line of the through hole, which makes the length of the second conductive element 122 smaller, which helps to save the manufacturing cost of the second conductive element 122 and thus reduce the manufacturing cost of the circuit breaker 100.
[0103] Based on the circuit breaker 100 provided in the example above, please refer to... Figure 1 and Figure 2The circuit breaker 100 further includes a third overcurrent protection component, which is spaced apart from the second overcurrent protection component 152 and the first overcurrent protection component 151. The conductive component 120 further includes a third conductive element 123, which is spaced apart from the second conductive element 122 and the first conductive element 121, with one end of the third conductive element 123 connected to the third overcurrent protection component. The first wiring component 130 further includes a third connecting piece 133, which is spaced apart from the first connecting piece 131 and the second connecting piece 132, with the other end of the third connecting piece 133 connected to the third conductive element 123.
[0104] For example, the third overcurrent protection component, the third conductive element 123, and the third terminal block 133 correspond to the C-phase circuit in the circuit breaker 100.
[0105] The third overcurrent protection component functions similarly to the first overcurrent protection component 151 and the second overcurrent protection component 152, and will not be further described in this application example.
[0106] The second wiring assembly 160 includes a seventh terminal block 163, which is directly or indirectly connected to the side of the second overcurrent protection assembly 152 away from the third conductive element 123.
[0107] The structure of the third conductive element 123 is similar to that of the first conductive element 121. The third conductive element 123 includes a fifth connecting segment, a third bending segment, and a sixth connecting segment. The third bending segment connects the fifth connecting segment and the sixth connecting segment. The fifth connecting segment connects the third overcurrent protection component and the third bending segment, and the sixth connecting segment connects the third bending segment and the third terminal block 133.
[0108] The fifth connecting segment, the third bending segment, and the sixth connecting segment work together to form a "U"-shaped structure. The opening direction of the "U"-shaped structure formed by the third conductive element 123 is opposite to the opening direction of the "U"-shaped structure formed by the first conductive element 121.
[0109] The third conductive element 123 functions similarly to the first conductive element 121 and the second conductive element 122, and will not be further described in this application example.
[0110] The third connector 133 has a similar function to the first connector 131 and the second connector 132, and will not be described further in this application example.
[0111] In this application example, the third overcurrent protection component, the third overcurrent protection component being spaced apart from the second overcurrent protection component 152 and the first overcurrent protection component 151, the third conductive element 123 being spaced apart from the second conductive element 122 and the first conductive element 121, and the third terminal block 133 being spaced apart from the first terminal block 131 and the second terminal block 132 can all reduce the possibility of a short circuit occurring inside the circuit breaker 100.
[0112] Based on the circuit breaker 100 provided in the example above, please refer to... Figure 1 and Figure 2 The conductive component 120 further includes a fourth conductive element 124, which is spaced apart from the first conductive element 121, the second conductive element 122, and the third conductive element 123. The fourth conductive element 124 passes through a through hole. The first wiring assembly 130 further includes a fourth wiring piece 134, which is spaced apart from the first wiring piece 131, the second wiring piece 132, and the third wiring piece 133.
[0113] For example, the fourth conductive element 124 and the fourth terminal block 134 correspond to the N-phase circuit in the circuit breaker 100.
[0114] The second wiring assembly 160 includes an eighth connector 164, which is connected to the side of the fourth conductive element 124 opposite to the fourth connector 134.
[0115] The fourth conductive element 124 and the fourth terminal piece 134 can be integrally formed, or they can be fixedly connected by welding or other methods.
[0116] The fourth conductive element 124 has a similar structure to the third conductive element 123. The fourth conductive element 124 includes a seventh connecting segment, a fourth bending segment, and an eighth connecting segment. The seventh connecting segment connects the fourth terminal block 134 and the fourth bending segment. The fourth bending segment connects the seventh connecting segment and the eighth connecting segment. The seventh connecting segment is connected to the eighth terminal block 164. The seventh connecting segment, the fourth bending segment, and the eighth connecting segment cooperate to form a U-shaped structure. The opening direction of the U-shaped structure formed by the fourth conductive element 124 is the same as the opening direction of the U-shaped structure formed by the third conductive element 123.
[0117] The fourth terminal block 134, the fourth conductive element 124, and the eighth terminal block 164 constitute the internal circuit of the circuit breaker 100. The fourth terminal block 134 can be electrically connected to the power supply line, and the eighth terminal block 164 can be electrically connected to the power supply line. The internal circuit of the circuit breaker 100 can be electrically connected to the power supply line through the fourth terminal block 134 and the eighth terminal block 164.
[0118] In this application example, the first conductive element 121, the second conductive element 122, the third conductive element 123, and the fourth conductive element 124 are all disposed in the through hole. Through the cooperation of the zero-sequence current transformer 140, the first conductive element 121, the second conductive element 122, the third conductive element 123, and the fourth conductive element 124, leakage current can be detected in the circuit, providing leakage current protection for the circuit.
[0119] Based on the circuit breaker 100 provided in the example above, please refer to... Figure 1 The circuit breaker 100 also includes a mounting bracket 170, at least part of which is disposed in the through hole. The mounting bracket 170 includes a plurality of spaced mounting slots, and a plurality of conductive elements pass through different mounting slots.
[0120] The mounting bracket 170 is made of insulating material, such as nylon (Polyamide, PA), polyethylene (Polyethylene, PE) or other insulating materials, which are not limited in this application embodiment.
[0121] The mounting bracket 170 facing the bottom wall of the housing 110 can be fixedly connected to the bottom wall of the housing 110 by means of snap-fit, threaded connection, fusion bonding, adhesive bonding, etc.
[0122] The mounting bracket 170 passes through the through hole and can connect the space of the zero-sequence current transformer 140 toward the overcurrent protection component and the space of the zero-sequence current transformer 140 toward the first terminal block 131 group through the mounting groove, so that multiple conductive elements in the conductive component 120 can pass through the mounting groove to realize the connection between the corresponding overcurrent protection component and the terminal block.
[0123] The number of mounting slots can be greater than or equal to the number of conductive parts. In this application example, only the case where the number of mounting slots is equal to the number of conductive parts is described.
[0124] For example, the mounting slot includes a first mounting slot, a second mounting slot, a third mounting slot, and a fourth mounting slot that are spaced apart.
[0125] The first mounting groove can be located on the side of the mounting bracket 170 near the first conductive element 121, the second mounting groove is located on the side of the mounting bracket 170 near the bottom wall of the housing 110, the third mounting groove is located on the side of the mounting bracket 170 near the third conductive element 123, and the fourth mounting groove is located on the side of the mounting bracket 170 away from the bottom wall of the housing 110. In this application example, the arrangement of the first, second, third, and fourth mounting grooves is only described as an example and no specific limitation is made. As long as the first, second, third, and fourth mounting grooves are spaced apart, the insulation performance between the first conductive element 121, the second conductive element 122, the third conductive element 123, and the fourth conductive element 124 can be guaranteed, and the possibility of short circuit between the first conductive element 121, the second conductive element 122, the third conductive element 123, and the fourth conductive element 124 can be reduced.
[0126] In this application example, by setting up a mounting bracket 170, and the mounting bracket 170 including multiple spaced mounting slots, multiple conductive components in the conductive assembly 120 can be inserted into different mounting slots, which can improve the insulation performance between different conductive components and reduce the possibility of internal short circuit in the circuit breaker 100.
[0127] With the mounting bracket 170 in place, the outer side of the conductive component may not require an insulating sleeve, which can reduce the manufacturing cost of the circuit breaker 100. Alternatively, the outer side of the conductive component may be equipped with an insulating sleeve. The cooperation between the mounting bracket 170 and the insulating sleeve can further improve the insulation performance between different conductive components, thereby further ensuring the reliability of the circuit breaker 100.
[0128] Finally, it should be noted that the above embodiments are merely specific implementations of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.
Claims
1. A circuit breaker characterized by, include: Zero-sequence current transformer, with through hole; A conductive component is inserted through the through hole; A first wiring assembly is disposed on one side of the zero-sequence current transformer, and a conductive assembly is disposed on the side of the first wiring assembly facing the zero-sequence current transformer. The first wiring assembly is electrically connected to the conductive assembly and the power supply line. The conductive component includes a plurality of spaced-apart conductive elements, and the first wiring component includes a plurality of spaced-apart connecting pieces. At the connection position between the conductive element and the connecting piece, the center line of at least one conductive element is located on the side of the center line of the connecting piece closer to the through hole.
2. The circuit breaker of claim 1, wherein, Along the direction of the connector towards the conductive element, at the connection position between the conductive element and the connector, at least one sidewall of the conductive element near the through hole is flush with the sidewall of the connector near the through hole.
3. The circuit breaker of claim 1, wherein, The circuit breaker includes a first overcurrent protection component, the conductive component includes a first conductive element, the first wiring component includes a first terminal block, the first overcurrent protection component is disposed on the side of the first conductive element opposite to the first terminal block, and the first conductive element includes: The first connection segment is connected to the first overcurrent protection component; The first bending segment is connected to the first connecting segment. The first bending segment bends along the first connecting segment toward the first terminal piece. The first bending segment passes through the through hole. The second connecting segment is connected to the end of the first bent segment away from the first connecting segment. The end of the second connecting segment opposite to the first bent segment is connected to the first terminal piece. The second connecting segment is bent along the first bent segment toward the first terminal piece.
4. The circuit breaker of claim 3, wherein, The second connecting segment bends in the direction toward the first terminal block, and the second connecting segment is arc-shaped; or, the second connecting segment includes multiple segments arranged at an angle.
5. The circuit breaker according to claim 3, characterized in that, The first bent section passes through the through hole along the direction of the first bent section, and the size of the first bent section is approximately equal to the size of the through hole.
6. The circuit breaker of any of claims 3-5, wherein, The first connector has a first fixing hole, and the center line of the first fixing hole is located on the side of the center line of the first connector away from the through hole.
7. The circuit breaker of claim 3, wherein, Also includes: The second overcurrent protection component is arranged at an interval from the first overcurrent protection component; The conductive component further includes a second conductive element, which is spaced apart from the first conductive element, and one end of the second conductive element is connected to the second overcurrent protection component. The first wiring assembly further includes a second wiring piece, which is spaced apart from the first wiring piece, and the second wiring piece is connected to the other end of the second conductive element.
8. The circuit breaker according to claim 7, characterized in that, The line connecting the center line of the second terminal piece and the center line of the second conductive element is parallel to the center line of the through hole.
9. The circuit breaker of claim 1, wherein, Also includes: The mounting bracket is at least partially disposed within the through hole, and the mounting bracket includes a plurality of spaced mounting slots, with a plurality of conductive elements passing through different mounting slots.