A circuit breaker bus connection structure

Abstract

The utility model discloses a circuit breaker bus connection structure, including circuit breaker body and adapter, every bus bar row in adapter is connected with corresponding incoming line row on circuit breaker body through an independent conductive connecting piece, and the top side of adapter is equipped with multiple contact ports that expose multiple bus bar rows respectively, and the circuit breaker body includes the conductive connecting piece that is integrally connected with the incoming line row, and the conductive connecting piece is bent to extend to the contact port on the side of adapter and is directly fixed with the bus bar row, thereby realizing the modular installation of one -step alignment and one -time fixation, the contact surface between the conductive connecting piece and the bus bar row is directly contacted with air, there is no heat barrier of closed structure, and the heat dissipation performance is more excellent, meanwhile, the steps of independent bending and multiple sets of bolt fastening of the intermediate bus bar are saved, the connection node is reduced, the contact resistance and the heating risk are reduced, the assembly process is simplified, and the utility model is suitable for the scene such as switch board that needs long -term stable operation.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical technology, specifically to a circuit breaker busbar connection structure. Background Technology

[0002] As a key component of low-voltage power distribution cabinets, the busbar system adopts holeless electrical installation technology. Its distribution busbar has the dual functions of conductor and support for electrical components, and is enclosed to achieve the effects of electrical insulation and enclosed installation, ensuring the safety and reliability of power transmission.

[0003] As the core connection device between the circuit breaker and the busbar, the busbar adapter is a key component for achieving a reliable electrical connection between the two. In practical applications, the busbar adapter needs to be installed in conjunction with the circuit breaker, allowing electrical components to be connected to the energized copper busbar without the need for additional incoming cables. Existing busbar adapter methods mainly include the following: One traditional method involves bending the busbar and directly connecting it between the circuit breaker and the busbar adapter. Two sets of independent bolts are then used to tighten the connections between the busbar and the circuit breaker, and between the busbar and the busbar adapter, respectively, thus achieving circuit continuity. This method requires high bending precision of the busbar, involves many connection points, and has a cumbersome operation process, increasing installation time and cost. Another type is the busbar adapter, which uses copper tubing as the connection carrier with the circuit breaker. Its structure mainly includes a base, a cover plate, and a transfer conductive component set in the base. The copper tubing directly connects to the circuit breaker terminal block to complete the indirect connection between the circuit breaker and the busbar copper bus. This type of busbar adapter structure is complex in design, requiring multiple auxiliary connectors in addition to the copper tubing. The assembly process is cumbersome. The heat dissipation performance of the copper tubing itself is limited, and the heat generated during power transmission is difficult to dissipate quickly. The heat accumulation can easily lead to an increase in the overall temperature of the product, which not only affects the conductivity but may also accelerate the aging of surrounding insulation components and reduce the safety of system operation. Utility Model Content

[0004] Therefore, the technical problem to be solved by this utility model is to overcome the problems of the existing busbar adapter using copper pipe as the connection carrier with the circuit breaker, requiring multiple auxiliary connectors in addition to the copper pipe, poor heat dissipation performance of the copper pipe, and complicated assembly process.

[0005] To address the aforementioned problems, this utility model provides a circuit breaker busbar connection structure, including a circuit breaker body and an adapter. The adapter contains multiple busbars spaced apart, each busbar connected to a corresponding incoming busbar on the circuit breaker body via an independent conductive connector. The adapter has multiple contact ports on its top side facing the circuit breaker body, each exposing one of the multiple busbars. The circuit breaker body includes an incoming busbar on its incoming side and a conductive connector connected to the incoming end. One end of the conductive connector is integrally connected to the incoming end, and the other end bends and extends downwards towards the adapter, where it is fixedly connected to the exposed busbar at the corresponding contact port.

[0006] As a preferred embodiment, the circuit breaker body is provided with an inlet port suitable for accommodating the inlet busbar and conductive connector, and the contact port is located on the lower side of the inlet port.

[0007] As a preferred embodiment, the conductive connector is bent vertically downward or extends obliquely downward from the inlet port and enters the contact port to connect with the busbar of the adapter.

[0008] As a preferred embodiment, the conductive connector and the busbar are fixedly connected by a fastener, and the conductive connector and the busbar are respectively provided with mounting holes for the fastener.

[0009] As a preferred embodiment, the incoming port is an assembly cavity or assembly slot formed on the circuit breaker body, and the conductive connector is integrally positioned and fixed in the assembly cavity or assembly slot with the incoming line.

[0010] As a preferred embodiment, the other end of the conductive connector is provided with a contact plate portion adapted to the shape of the contact port. The contact plate portion is in contact with the exposed busbar surface at the contact port position, and the two are fixedly connected by fasteners.

[0011] As a preferred embodiment, the adapter has a recessed hole structure located below the contact port, and a nut that cooperates with a fastener for locking is fixedly embedded in the recessed hole structure.

[0012] As a preferred embodiment, the adapter includes an insulating cover plate disposed on its top, the insulating cover plate being located between the adapter and the circuit breaker body, the insulating cover plate having a contact port for the conductive connector to pass through, the contact port being located near one end of the insulating cover plate and communicating with the inner cavity of the adapter.

[0013] As a preferred embodiment, a stationary contact is formed on the side of the incoming line bar away from the conductive connector. The conductive connector is a metal conductive bar, which is integrally formed with the incoming line bar and the stationary contact to form a continuous conductor on the incoming side of the circuit breaker for connecting to the circuit.

[0014] Compared with the prior art, the technical solution of this utility model has the following advantages: 1. In the circuit breaker busbar connection structure provided by this utility model, multiple independent busbars are arranged at intervals within the adapter. Each busbar is connected to the corresponding incoming line on the circuit breaker body through an independent conductive connector. The adapter has a contact port that exposes part of the busbar. One end of the conductive connector is integrally connected to the incoming line, and the other end is bent and extended to the contact port to directly fit and fix to the busbar. This achieves a modular installation effect of one-step alignment and one-time fixing, eliminating the need for independent bending of intermediate busbars and multiple sets of bolt tightening steps, reducing connection complexity. The nodes reduce contact resistance and heat generation risk, simplify the assembly process, significantly reduce installation costs and time, improve installation efficiency, and enhance product versatility. Furthermore, these conductive connectors are typically exposed metal busbars with a much larger heat dissipation area than tubular copper pipes. The contact surface between the conductive connector and the busbar is in direct contact with the air, eliminating the need for heat insulation in a closed structure, resulting in superior heat dissipation performance. The circuit breaker busbar connection structure using this technology helps extend system lifespan and ensure stable conductivity, making it suitable for scenarios requiring long-term stable operation, such as distribution cabinets.

[0015] 2. In the circuit breaker busbar connection structure provided by this utility model, the incoming line busbar and the conductive connector are integrally connected and positioned in the incoming port of the circuit breaker body, reducing the time for adjustment and alignment. Since the conductive connector extends vertically downwards from the incoming port to the contact port, during installation, it only needs to be aligned with the contact port, inserted, and fixed, eliminating the need for multiple adjustments to angle and position as required by traditional copper busbars or copper pipe connections, thus reducing assembly difficulty. Furthermore, this vertically bent or obliquely downward-bent conductive connector design forms the shortest and most direct current path from the circuit breaker to the busbar, which helps reduce energy loss and voltage drop, improves conductivity, effectively reduces operating temperature rise, and achieves a dual improvement in the product's electrical performance and heat dissipation performance.

[0016] 3. In the circuit breaker busbar connection structure provided by this utility model, the insulating cover plate is located between the adapter and the circuit breaker body, directly separating the live parts between the two. By opening a contact port on the insulating cover plate for conductive connectors to pass through, and the remaining area of ​​the insulating cover plate completely encloses the top of the adapter, it can effectively prevent foreign objects such as dust, water vapor, and metal debris from entering the inner cavity of the adapter, avoid oxidation and short circuit of the busbar contacts, thereby strengthening the sealing protection and protecting the internal core components.

[0017] 4. In the circuit breaker busbar connection structure provided by this utility model, the conductive connector, the incoming line busbar, and the stationary contact are integrated into a continuous conductor through an integrated molding process, which completely eliminates the contact resistance of components such as transition busbars and bolts in traditional copper pipe connections. Furthermore, the contact surface between the conductive connector and the busbar can be fixedly connected by only one set of fasteners. This design significantly reduces connection nodes, reduces heat sources, simplifies the assembly process, and greatly improves efficiency. It is suitable for modular assembly between circuit breakers and adapters. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below.

[0019] Figure 1 This is a three-dimensional structural diagram of the circuit breaker busbar connection structure provided by this utility model; Figure 2 This is a cross-sectional view of the busbar connection structure of the circuit breaker according to this utility model; Figure 3 This is a schematic diagram of the adapter of this utility model.

[0020] Explanation of reference numerals in the attached drawings: 1. Circuit breaker body; 11. Incoming line busbar; 12. Stationary contact; 13. Incoming line port; 2. Adapter; 21. Recessed hole structure; 3. Busbar; 4. Conductive connector; 41. Contact plate; 5. Contact port; 6. Insulating cover; 7. Fastener; 8. Nut. Detailed Implementation

[0021] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0022] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] Example The following is a detailed description of this embodiment with reference to the accompanying drawings: This utility model provides, for example Figure 1-3 The circuit breaker busbar connection structure shown includes a circuit breaker body 1 and an adapter 2. The adapter 2 has multiple busbars 3 spaced apart. The circuit breaker body 1 has multiple incoming line bars 11. Each busbar 3 is connected to the corresponding incoming line bar 11 on the circuit breaker body 1 through an independent conductive connector 4. The adapter 2 has multiple contact ports 5 on the top side facing the circuit breaker body 1, which expose the multiple busbars 3 respectively. The circuit breaker body 1 includes an incoming line bar 11 on its incoming line side and a conductive connector 4 connected to the incoming line end. One end of the conductive connector 4 is integrally connected to the incoming line end, and the other end is bent and extended downward to one side of the adapter 2, and is fixedly connected to the exposed busbar 3 at the contact port 5.

[0024] In the above embodiment, each busbar 3 on the adapter 2 is connected to the corresponding incoming line 11 on the circuit breaker body 1 through an independent conductive connector 4. By providing a contact port 5 on the adapter 2 that exposes part of the busbar 3, one end of the conductive connector 4 is integrally connected to the incoming line 11, and the other end is bent and extended to the contact port 5 to directly fit and fix with the busbar 3. This achieves a modular installation effect of one-step alignment and one-time fixing. This conductive connector 4 is usually a metal conductive bar that can be directly exposed, with a heat dissipation area much larger than that of a tubular copper pipe. The contact surface between the conductive connector 4 and the busbar 3 is in direct contact with the air, without the heat barrier of a closed structure, resulting in better heat dissipation performance. At the same time, it eliminates the steps of independent bending of the intermediate busbar and tightening with multiple sets of bolts, reduces connection nodes, reduces contact resistance and heat generation risk, simplifies the assembly process, significantly reduces installation costs and time, improves installation efficiency, and improves the versatility of the product. The circuit breaker busbar connection structure using this technical solution is beneficial for extending the service life of the system and ensuring stable conductivity performance. It is suitable for scenarios such as distribution cabinets that require long-term stable operation.

[0025] like Figure 1As shown, the circuit breaker body 1 is provided with an inlet port 13 suitable for accommodating the inlet busbar 11 and the conductive connector 4. The contact port 5 is located on the lower side of the inlet port. The conductive connector 4 is bent vertically downward or extends obliquely downward from the inlet port 13 and enters the contact port 5 to connect with the busbar 3 of the adapter 2. In this structural configuration, the incoming line busbar 11 and the conductive connector 4 are integrally connected and positioned in the incoming line port 13 of the circuit breaker body 1, reducing adjustment and alignment time. Since the conductive connector 4 extends vertically downwards from the incoming line port 13 to the contact port 5, installation only requires aligning it with the contact port 5, inserting and fixing it, eliminating the need for multiple angle and position adjustments required by traditional copper busbars or copper pipes, thus reducing assembly difficulty. This allows the conductive connector 4 and the busbar 3 of the adapter to form a vertically stacked structure, significantly improving space utilization. Furthermore, this vertically bent or obliquely downward-bent design of the conductive connector creates the shortest and most direct current path from the circuit breaker to the busbar, which helps reduce energy loss and voltage drop, improves conductivity, and allows for greater surface area for heat dissipation due to the shorter current path and larger conductive component cross-section, effectively reducing operating temperature rise. In addition, the contact area between the conductive connector and the busbar is directly exposed to the air, utilizing the principle of rising hot air to form a natural convection channel, improving heat dissipation efficiency and reducing local temperature rise, thereby achieving a dual improvement in both electrical and heat dissipation performance.

[0026] For further optimization settings, refer to Figure 2 The incoming line busbar 11 has a stationary contact 12 formed on the side away from the conductive connector 4. The conductive connector 4 is a metal conductive busbar, preferably a copper or aluminum busbar. The conductive connector 4, the incoming line busbar 11, and the stationary contact 12 are integrally formed to constitute a continuous conductor on the incoming side of the circuit breaker for connecting to the circuit. The incoming port 13 is an assembly cavity or assembly groove formed on the circuit breaker body 1. The conductive connector 4 and the incoming line busbar 11 are integrally positioned, inserted, and fixed in the assembly cavity or assembly groove. This design reduces the time for adjustment and alignment. Since the conductive connector 4 extends vertically downward from the incoming port 13 to the contact port 5, during installation, it is only necessary to... Align the connector with the contact port, insert and fix it, eliminating the need for multiple angle and position adjustments required by traditional copper busbars or copper pipes, thus reducing assembly difficulty. Furthermore, the conductive connector 4, with its vertical or downward bending design, forms the shortest and most direct current path from the circuit breaker to the busbar 3, which helps reduce energy loss and voltage drop, improves conductivity, and allows for greater surface area for heat dissipation due to the shorter current path and larger conductive component cross-section, effectively reducing operating temperature rise. In addition, the contact area between the conductive connector and the busbar is directly exposed to the air, forming a natural convection channel based on the principle of hot air rising, improving heat dissipation efficiency and reducing local temperature rise, thereby achieving a dual improvement in both the electrical and heat dissipation performance of the product.

[0027] In this embodiment, the conductive connector 4 and the busbar 3 are fixedly connected by a fastener 7. The conductive connector 4 and the busbar 3 are respectively provided with mounting holes for the fastener 7. The fastener 7 is preferably a bolt structure. For further details, refer to [reference needed]. Figure 2 The other end of the conductive connector 4 is provided with a contact plate portion 41 that matches the shape of the contact port 5. The contact plate portion 41 is in contact with the exposed busbar 3 surface at the contact port 5 and is fixedly connected by fasteners 7. The adapter 2 is provided with a recessed hole structure 21 located below the contact port, and a nut 8 that cooperates with the fasteners 7 is fixedly embedded in the recessed hole structure 21. In summary, the conductive connector 4, the inlet busbar 11, and the stationary contact 12 form a continuous conductor through an integrated molding process, completely eliminating the contact resistance of components such as transition bars and bolts in traditional copper pipe connections. Furthermore, the contact surface between the conductive connector 4 and the busbar 3 can be fixedly connected by only one set of fasteners 7. This design significantly reduces connection nodes, reduces heat sources, simplifies the assembly process, and greatly improves efficiency, making it suitable for modular assembly between circuit breakers and adapters.

[0028] The adapter 2 includes an insulating cover plate 6 on its top, and multiple busbars 3 are disposed in the inner cavity of the adapter 2. The bottom of the adapter 2 has an interface corresponding to the multiple busbars 3, so that the busbars 3 can be electrically connected to the corresponding phase busbars at the interface position. The insulating cover plate 6 has a contact port 5 for the conductive connector 4 to pass through. The contact port 5 is located near one end of the insulating cover plate and communicates with the inner cavity of the adapter 2. With this structure, the insulating cover plate 6 is located between the adapter 2 and the circuit breaker body 1, directly separating the live parts between the two. By opening the contact port 5 on the insulating cover plate 6, only the conductive connector 4 can be inserted to fit and connect with the busbar, while the rest of the insulating cover plate 6 completely seals the top of the adapter, which can effectively prevent foreign objects such as dust, water vapor, and metal debris from entering the inner cavity of the adapter, avoid oxidation and short circuit of the busbar contacts, thereby strengthening the sealing protection and protecting the internal core components.

[0029] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A circuit breaker busbar connection structure, comprising a circuit breaker body (1) and an adapter (2), wherein a plurality of busbars (3) are spaced apart within the adapter (2), characterized in that The adapter (2) has multiple contact ports (5) on the top side facing the circuit breaker body (1), each exposing multiple busbars (3). The circuit breaker body (1) includes an inlet busbar (11) on its inlet side and a conductive connector (4) connected to the inlet end. One end of the conductive connector (4) is integrally connected to the inlet busbar (11), and the other end is bent and extended to the side of the adapter (2) below, and is fixedly connected to the exposed busbar (3) at the corresponding contact port (5).

2. The circuit breaker busbar connection structure according to claim 1, characterized in that: The circuit breaker body (1) is provided with an inlet port (13) suitable for accommodating the inlet busbar (11) and the conductive connector (4), and the contact port (5) is located on the lower side of the inlet port.

3. The circuit breaker busbar connection structure according to claim 2, characterized in that: The conductive connector (4) bends vertically downward or extends obliquely downward from the inlet port (13) and enters the contact port (5) to connect with the busbar of the adapter (2).

4. The circuit breaker busbar connection structure according to claim 2, characterized in that: The incoming port (13) is an assembly cavity or assembly slot formed on the circuit breaker body (1). The conductive connector (4) is integrally positioned and fixed in the assembly cavity or assembly slot with the incoming line bar (11).

5. The circuit breaker busbar connection structure according to any one of claims 1-4, characterized in that: The conductive connector (4) and the busbar (3) are fixedly connected by a fastener (7), and the conductive connector (4) and the busbar (3) are respectively provided with mounting holes for the fastener (7).

6. The circuit breaker busbar connection structure according to claim 5, characterized in that: The other end of the conductive connector (4) is provided with a contact plate (41) that is adapted to the shape of the contact port. The contact plate (41) is attached to the surface of the exposed busbar (3) at the contact port (5) and the two are fixedly connected by fasteners (7).

7. The circuit breaker busbar connection structure according to claim 6, characterized in that: The adapter (2) has a recessed hole structure (21) located below the contact port, and a nut (8) that cooperates with the fastener (7) for locking is fixedly embedded in the recessed hole structure (21).

8. The circuit breaker busbar connection structure according to claim 1, characterized in that: The adapter (2) includes an insulating cover plate (6) disposed on its top. The insulating cover plate (6) is located between the adapter (2) and the circuit breaker body (1). The insulating cover plate (6) has a contact port (5) through which the conductive connector (4) passes. The contact port (5) is located near one end of the insulating cover plate and communicates with the inner cavity of the adapter (2).

9. The circuit breaker busbar connection structure according to claim 1, characterized in that: The incoming line bar (11) has a stationary contact (12) formed on the side away from the conductive connector (4). The conductive connector (4) is a metal conductive bar and is integrally formed with the incoming line bar (11) and the stationary contact (12) to form a continuous conductor on the incoming side of the circuit breaker for connecting to the circuit.

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