Capacity-increasing type circuit breaker
By integrating the middle cover and the insert into a single design and forming grooves on the terminal block, the problem of increasing the number of inserts during circuit breaker capacity expansion and retrofitting is solved, achieving versatility and cost reduction of the circuit breaker, and improving assembly efficiency.
Patent Information
- Application Number
- CN202522745326.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-25
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2035-12-25
AI Technical Summary
When upgrading existing circuit breakers, the number of inserts increases, leading to increased complexity in parts management and higher supply chain and warehousing costs.
Design an enhanced capacity circuit breaker with an integrally formed middle cover and insert, reinforced with reinforcing ribs to strengthen the connection, and formed slots on the terminal block to achieve versatility for 400A and 630A circuit breakers, reducing the number of parts.
It achieves versatility for 400A and 630A circuit breakers, reduces the complexity of parts management and supply chain and warehousing costs, and improves assembly efficiency and quality.
Smart Images
Figure CN223842851U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of low-voltage electrical technology, specifically to a capacity-enhancing circuit breaker. Background Technology
[0002] With increasing electricity load, it is often necessary to upgrade existing circuit breakers, for example, by increasing the rated current from 400A to 630A. To increase current carrying capacity, the core method is to increase the cross-sectional area of conductive components. To ensure the versatility of the base and middle cover, a common approach is to increase the thickness of copper components such as stationary contacts and connecting plates. However, this directly results in the front and rear tabs, which cannot maintain their original height due to changes in assembly space, and must be lowered accordingly. Ultimately, 400A and 630A circuit breakers require front and rear tabs of different heights, resulting in the need for separate materials for four tabs. This not only increases the complexity of parts management but also raises supply chain and warehousing costs. Utility Model Content
[0003] Therefore, the technical problem to be solved by this utility model is to overcome the defects of the existing technology, which has a large number of inserts and increases the supply chain and warehousing costs, so as to provide a high-capacity circuit breaker with strong versatility and low cost.
[0004] Therefore, this utility model provides a capacity-enhancing circuit breaker, including a circuit breaker body and two rows of terminal plates disposed on both sides thereof. The circuit breaker body includes a middle cover and a base. The middle cover includes a middle cover body and inserts disposed on both sides of the middle cover body and extending toward the terminal plates. The inserts are integrally connected to the middle cover body. The terminal plates are formed with slots for inserts to be inserted.
[0005] The main body of the middle cover has outwardly extending partitions on both sides that are perpendicularly connected to the insert. The partitions are used to separate two adjacent terminal plates, and reinforcing ribs are provided at the connection between the partitions and the insert.
[0006] The reinforcing ribs are respectively located on the inner and outer sides of the partition.
[0007] The terminal block is formed with multiple positioning holes for screws to pass through.
[0008] The slot is located adjacent to the positioning hole.
[0009] The circuit breaker body has a stationary contact on one side, the stationary contact including an integrally bent and connected stationary contact plate and a first terminal plate, the stationary contact plate being located inside the circuit breaker body, the first terminal plate extending to the outside of the circuit breaker body, and having the groove formed thereon.
[0010] The circuit breaker body has a connecting plate on one side. The connecting plate includes an integrally bent and connected connecting part and a second terminal plate. The connecting part is located inside the circuit breaker body and is electrically connected to the moving contact. The second terminal plate extends to the outside of the circuit breaker body and is formed with the slot.
[0011] The main body of the middle cover and the inserts on both sides are integrally formed by injection molding.
[0012] The technical solution of this utility model has the following advantages:
[0013] 1. The capacity-enhancing circuit breaker provided by this utility model includes a middle cover body and inserts disposed on both sides of the middle cover body and extending toward the terminal plate. The inserts are integrally connected to the middle cover body. By integrating the middle cover and the inserts into an integrated design, the number of parts is reduced. For a 400A frame-class circuit breaker, the bottom of the insert fits snugly against the terminal plate. For a 630A circuit breaker, when the thickness of the terminal plate is increased, a slot is formed on the terminal plate, and the insert is directly inserted into the slot. That is, the above-mentioned middle cover can be used for both 400A and 630A frame-class circuit breakers, thus eliminating the need to produce two types of middle covers, improving versatility, effectively reducing the complexity of parts management, and reducing supply chain and warehousing costs.
[0014] 2. The capacity-enhancing circuit breaker provided by this utility model greatly enhances the mechanical strength and deformation resistance at the connection between the insert and the partition by setting reinforcing ribs.
[0015] 3. The capacity-enhancing circuit breaker provided by this utility model has a terminal plate with multiple positioning holes for screws to pass through, thereby ensuring that subsequent inserts can be smoothly and without deviation into the slots, improving assembly efficiency and quality. Attached Figure Description
[0016] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0017] Figure 1 This is a perspective view of the circuit breaker of this utility model;
[0018] Figure 2 This is a cross-sectional view of the circuit breaker;
[0019] Figure 3 for Figure 2 A magnified structural diagram of part A in the middle;
[0020] Figure 4 This is an exploded structural diagram of the middle cover, stationary contact, and connecting plate;
[0021] Figure 5 This is a three-dimensional view of the middle cover;
[0022] Figure 6 This is a three-dimensional view of the stationary contact and the connecting plate.
[0023] Explanation of reference numerals in the attached drawings: 1. Circuit breaker body; 2. Middle cover; 3. Base; 4. Terminal plate; 5. Middle cover body; 6. Insert; 7. Slot; 8. Partition; 9. Reinforcing rib; 11. Positioning hole; 12. Stationary contact; 13. Stationary contact plate; 14. First terminal plate; 15. Connecting plate; 16. Connecting part; 17. Second terminal plate. Detailed Implementation
[0024] 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.
[0025] 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., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0027] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.
[0028] Example
[0029] This embodiment provides a capacity-enhancing circuit breaker, such as... Figure 1 As shown, it includes a circuit breaker body 1 and two rows of terminal blocks 4 disposed on both sides of it.
[0030] The circuit breaker body 1 includes a middle cover 2 and a base 3. For example... Figure 2 , Figure 3 and Figure 4 As shown, the circuit breaker body 1 has a stationary contact 12 on one side and a connecting plate 15 on the other side, as... Figure 6 As shown, the stationary contact 12 includes a stationary contact plate 13 and a first terminal plate 14 that are integrally bent and connected. The stationary contact plate 13 is located inside the circuit breaker body 1, and the first terminal plate 14 extends to the outside of the circuit breaker body 1 and is formed with the slot 7. The connecting plate 15 includes a connecting part 16 and a second terminal plate 17 that are integrally bent and connected. The connecting part 16 is located inside the circuit breaker body 1 and is electrically connected to the moving contact. The second terminal plate 17 extends to the outside of the circuit breaker body 1 and is formed with the slot 7.
[0031] Middle cover 2, such as Figure 2 and Figure 3 As shown, it includes a middle cover body 5 and inserts 6 disposed on both sides of the middle cover body 5 and extending toward the terminal plate 4. The inserts 6 are integrally connected to the middle cover body 5. The middle cover body 5 has outwardly extending partitions 8 on both sides, which are perpendicularly connected to the inserts 6. The partitions 8 are used to separate two adjacent terminal plates 4, such as... Figure 5 As shown, a reinforcing rib 9 is provided at the connection between the partition 8 and the insert 6. In this embodiment, the reinforcing rib 9 is provided on the inner and outer sides of the partition 8. The terminal plate 4 is formed with a plurality of positioning holes 11 for screws to pass through, and the slot 7 is provided adjacent to the positioning holes 11. It should be noted that the middle cover body 5, the insert 6, and the partition 8 are integrally formed by injection molding.
[0032] The capacity-enhancing circuit breaker provided by this utility model includes a middle cover 2 comprising a middle cover body 5 and inserts 6 disposed on both sides of the middle cover body 5 and extending toward the terminal plate 4. The inserts 6 are integrally connected to the middle cover body 5. By integrating the middle cover 2 and the inserts 6 into one design, the number of parts is reduced. For a 400A frame-class circuit breaker, the bottom of the insert fits snugly against the terminal plate. For a 630A circuit breaker, when the thickness of the terminal plate 4 is increased, a slot 7 is formed on the terminal plate 4, and the insert 6 is directly inserted into the slot 7. That is, the above-mentioned middle cover can be used for both 400A and 630A frame-class circuit breakers, thus eliminating the need to produce two different middle covers, improving versatility, effectively reducing the complexity of parts management, and lowering supply chain and warehousing costs. It should be noted that the depth of the slot can be changed according to different frame classes to adapt to the above-mentioned middle cover 2.
[0033] 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 capacity-enhancing circuit breaker, characterized in that, The circuit breaker includes a circuit breaker body (1) and two rows of terminal plates (4) disposed on both sides thereof. The circuit breaker body (1) includes a middle cover (2) and a base (3). The middle cover (2) includes a middle cover body (5) and inserts (6) disposed on both sides of the middle cover body (5) and extending toward the terminal plates (4). The inserts (6) are integrally connected to the middle cover body (5). The terminal plates (4) are formed with slots (7) for inserts (6) to be inserted.
2. The capacity-enhancing circuit breaker according to claim 1, characterized in that, The main body (5) of the middle cover has outwardly extending partitions (8) on both sides and perpendicularly connected to the insert (6). The partitions (8) are used to separate two adjacent terminal plates (4). The connection between the partitions (8) and the insert (6) is provided with reinforcing ribs (9).
3. The capacity-enhancing circuit breaker according to claim 2, characterized in that, The reinforcing ribs (9) are respectively located on the inner and outer sides of the partition (8).
4. The capacity-enhancing circuit breaker according to claim 1, characterized in that, The terminal block (4) is formed with multiple positioning holes (11) for screws to pass through.
5. The capacity-enhancing circuit breaker according to claim 4, characterized in that, The slot (7) is located adjacent to the positioning hole (11).
6. The capacity-enhancing circuit breaker according to claim 1, characterized in that, The circuit breaker body (1) has a stationary contact (12) on one side. The stationary contact (12) includes a stationary contact plate (13) and a first terminal plate (14) that are integrally bent and connected. The stationary contact plate (13) is located inside the circuit breaker body (1), and the first terminal plate (14) extends to the outside of the circuit breaker body (1) and is formed with the slot (7).
7. The capacity-enhancing circuit breaker according to claim 1, characterized in that, The circuit breaker body (1) has a connecting plate (15) on one side. The connecting plate (15) includes an integrally bent connecting part (16) and a second terminal plate (17). The connecting part (16) is located inside the circuit breaker body (1) and is electrically connected to the moving contact. The second terminal plate (17) extends to the outside of the circuit breaker body (1) and is formed with the slot (7).
8. The capacity-enhancing circuit breaker according to claim 1, characterized in that, The main body (5) of the middle cover and the inserts (6) on both sides are integrally formed by injection molding.