A circuit breaker transformer, a circuit breaker and a power distribution cabinet
By using an externally fixed universal circuit breaker transformer, the problems of heat dissipation and replacement difficulties are solved, achieving better heat dissipation and convenient replacement, and reducing product costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU DAQO KFINE ELECTRIC
- Filing Date
- 2025-06-06
- Publication Date
- 2026-07-07
AI Technical Summary
Existing universal circuit breaker transformers have difficulty dissipating heat and are difficult to replace, resulting in reduced product lifespan and a time-consuming and labor-intensive replacement process.
The universal circuit breaker transformer with external fixing method uses screws and clips for fixing features. The transformer is installed on the outside of the base plate, and an L-shaped feature is set on the base plate to fix the phase spacer, which enhances the heat dissipation effect and simplifies the disassembly process.
This achieves effective heat dissipation for the current transformer, simplifies the replacement process, reduces product costs, and improves operational convenience.
Smart Images
Figure CN224472287U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of low-voltage electrical components and equipment technology, specifically a universal circuit breaker transformer, a universal circuit breaker and a distribution cabinet. Background Technology
[0002] In the low-voltage electrical appliance industry, universal circuit breaker transformers are used to measure, protect, and control power systems, and are typically installed inside the circuit breaker. When a large fault current occurs, the coil heats up significantly. When space is limited and the heat cannot dissipate quickly enough, this can lead to a rapid temperature rise and reduce the product's lifespan. Furthermore, when a transformer fails and needs replacement, the product must be disassembled, which is time-consuming, labor-intensive, inconvenient, and slow. Summary of the Invention
[0003] In view of the shortcomings of the prior art, this application provides a universal instrument transformer, a universal circuit breaker and a distribution cabinet to solve the problems of heat dissipation and replacement of the instrument transformer in the prior art.
[0004] To achieve the above objectives, this application provides the following technical solution:
[0005] A universal circuit breaker transformer includes an annular housing, wherein a base plate fixing feature is provided on the annular outer side of the annular surface of the annular housing, and an insertion part extends along the annular axis on one side of the annular housing.
[0006] Preferably, the other side of the annular surface of the insertion part has symmetrical L-shaped features on both sides in the vertical direction. The L-shaped features are bent front sides, with one side parallel to the direction of the annular surface and the other side parallel to the direction of the axis of the annular surface.
[0007] Preferably, the base plate fixing feature uses screw fixing holes.
[0008] Based on the same inventive concept, this application also discloses a universal circuit breaker, including a base assembly, a base plate assembly, and an arc-extinguishing chamber. The base assembly includes a base and a moving contact, and the base plate assembly includes a base plate and a stationary contact. The arc-extinguishing chamber is installed on the upper part of the assembly formed by the base assembly and the base plate assembly. The moving contact is connected to a busbar that protrudes from the inside of the base plate to the lower part of the base plate. The stationary contact protrudes from the inside of the base plate to the upper part of the base plate. The circuit breaker also includes a lead busbar and the aforementioned universal circuit breaker current transformer. The lead busbar is installed and fixed on the stationary contact, extending out of the base plate. The outer surface of the base plate is provided with a current transformer fixing feature corresponding to the current transformer's base plate fixing feature. The current transformer is fixed to the base plate from the outside of the base plate through the base plate fixing feature and the current transformer fixing feature. The busbar extends from the shape of the current transformer's annular shell and is installed and fixed with the lead busbar. The cavity formed by the base plate and the base to accommodate the moving contact is smaller at the bottom and larger at the top.
[0009] Preferably, the outer surface of the base plate is provided with vertically adjacent wide and narrow slits between phases.
[0010] Preferably, the outer surface of the base plate has a vertical wide slit between phases, and a vertical narrow slit is left between the L-shaped features of adjacent current transformers.
[0011] Preferably, the busbar is a round busbar.
[0012] Preferably, the current transformer fixing feature uses screw fixing holes, and the current transformer is fixed to the base plate from the outside of the base plate through the screw fixing holes.
[0013] Based on the same inventive concept, this application also discloses a power distribution cabinet, including a phase partition and a universal circuit breaker as described above. The phase partition is installed between adjacent outgoing lines on the universal circuit breaker. A phase partition hook is provided on the side of the phase partition facing the universal circuit breaker. The phase partition hook is inserted into the wide slot and then fixed in the narrow slot.
[0014] Preferably, the phase spacer hook of the phase spacer is also inserted into the wide slot of the base plate and then fixed in the narrow slot left between the L-shaped features of the current transformer.
[0015] Compared with the prior art, the advantages of this solution are as follows: the universal circuit breaker transformer of this application uses an external fixing method, which not only helps heat dissipation and reduces the temperature rise of the transformer, but also facilitates disassembly and replacement, and is simple to operate. At the same time, it also has the structural feature of facilitating the fixing of phase partitions, reducing the number of parts and reducing product costs. Attached Figure Description
[0016] Figure 1 This is a three-dimensional structural diagram of the upper outgoing line bar and current transformer of an embodiment of the universal circuit breaker in this scheme, without the installation of the current transformer;
[0017] Figure 2 This is a schematic diagram of the outgoing line bar side of the hidden arc-extinguishing chamber top part of an embodiment of the universal circuit breaker of this scheme;
[0018] Figure 3 for Figure 2 Sectional view along axis AA;
[0019] Figure 4 A three-dimensional structural schematic diagram of an embodiment of a mutual inductor;
[0020] Figure 5 A schematic diagram of the output terminal block forming a narrow gap between adjacent current transformers;
[0021] Figure 6 A three-dimensional structural diagram of a distribution cabinet where phase partitions are mounted on a universal circuit breaker;
[0022] Among them, 1-universal circuit breaker, 11-base assembly, 111-base, 112-moving contact, 1121-round busbar, 12-base plate assembly, 121-base plate, 1211-wide slot, 1212-narrow slot, 122-stationary contact, 13-current transformer, 131-L-shaped feature, 14-outgoing line bar, 15-arc extinguishing chamber, 16-cavity, 2-phase partition, 21-phase partition hook, 21b-phase partition lower hook. Detailed Implementation
[0023] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.
[0024] In this application, the lower half of the circuit breaker base plate 121 provides a space for the installation of the current transformer 13. Therefore, inside the universal circuit breaker 1, the moving contact 112's moving cavity 16 is compressed, forming a narrow space. This structure facilitates upward gas movement, which is beneficial for arc extinguishing. Simultaneously, the current transformer 13 is installed on the outside of the base plate 121 and fixed with screws. Besides using screw holes for fixing, the base plate fixing features on the annular shell of the current transformer 13 can also use other fixing features such as clips. The current transformer 13 has L-shaped features 131 at both ends, which can be used to fix the phase spacer 2. An insertion part extends along the annular axis on one side of the annular shell of the current transformer 13. This insertion part inserts into the base plate 121 from the outside and serves as the outlet of the current transformer 13. In this embodiment, the current transformer 13 is an AC current transformer, primarily used for measurement, but also serving a protective purpose.
[0025] The universal circuit breaker in this embodiment only lists some of its components, including the base assembly 11, the base plate assembly 12, the current transformer 13, and the outgoing line busbar 14. The base assembly 11 includes a base 111 and a moving contact 112, and the base plate assembly 12 includes a base plate 121 and a stationary contact 122. Both the current transformer 13 and the outgoing line busbar 14 are mounted on the outside of the base plate 121. First, the current transformer 13 is fitted onto the busbar of the moving contact 112. In this embodiment, a round busbar 1121 is used, and it is fixed with screws. Then, the outgoing line busbar 14 is fixed onto the moving contact busbar. When the current transformer 13 is fixed to the base plate 121 using snap-fit or other methods, the outer surface of the base plate 121 is provided with corresponding holes and other current transformer fixing features.
[0026] Because the current transformer 13 is externally mounted, the space of the moving cavity 16 near the lower end of the circular busbar 1121 becomes smaller. The entire moving cavity 16 is a long and narrow cavity 16 that is wider at the top and narrower at the bottom. The reduction in space allows the gas to move better to the upper end, which is beneficial for entering the arc-extinguishing chamber 15 for arc extinguishing.
[0027] In this embodiment, both ends of the current transformer 13 have symmetrical L-shaped features, which can be used to fix the phase spacer 2. The vertical and horizontal surfaces of the L-shaped features fix the phase spacer 2 from the front-to-back direction and the top-to-bottom direction, respectively.
[0028] In the middle region of adjacent current transformers 13, the phase partition lower hook 21b is fixed in the base plate 121 and the narrow slit 1212 formed by the two L-shaped features. Because the current transformer 13 has symmetrical L-shaped features 131, the phase partition lower hook 21b can be stably fixed on the base plate 121, which is simple and convenient.
[0029] Phase partition 2 has two phase partition hooks 21 for fixing the phase partition to the circuit breaker. The upper hook is embedded in a groove in the base frame, and the lower hook is embedded in a slot formed by two L-shaped features of adjacent transformers. Figure 6 As shown, the upper and lower hooks are inserted into the wide slit, moved downwards, and fixed in the narrow slit. There are limit positions in three directions, ensuring a secure fixation.
[0030] During installation, the distribution cabinet in this embodiment includes a universal circuit breaker 1 and its phase partition 2. The phase partition 2 has two phase partition hooks 21 for fixing the phase partition 2 to the universal circuit breaker 1. The upper hook is embedded in the groove formed by the wide slot 1211 and the narrow slot 1212 of the base plate 121, and the lower hook 21b is embedded in the narrow slot 1212 formed by the two L-shaped features 131 of the adjacent transformer 13. Figure 6 As shown, the upper and lower hooks are inserted into the wide slit 1211 and moved downwards to be fixed in the narrow slit 1212. There are limit positions in three directions, and the fixation is secure.
[0031] In this specification, the schematic diagrams in the accompanying drawings highlight the main features and key parts, and details are appropriately simplified or omitted. Therefore, they do not represent actual scale and size relationships. The terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0032] The above description is only a preferred embodiment of the present solution, but the scope of protection claimed by the present solution is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this application, based on the technical solution and inventive concept of this application, should be included within the scope of protection of this application.
Claims
1. A universal circuit breaker transformer, comprising an annular housing, characterized in that: The annular outer surface of the annular shell is provided with a base plate fixing feature, and one side of the annular surface has an insertion part extending along the annular axis.
2. The universal circuit breaker transformer according to claim 1, characterized in that: The other side of the insertion part has symmetrical L-shaped features on both sides of the annular surface in the vertical direction. The L-shaped features are bent front sides, with one side parallel to the direction of the annular surface and the other side parallel to the direction of the axis of the annular surface.
3. The universal circuit breaker transformer according to claim 1, characterized in that: The base plate is fixed using screw holes.
4. A universal circuit breaker, comprising a base assembly (11), a base plate assembly (12), and an arc-extinguishing chamber (15), wherein the base assembly comprises a base (111) and a moving contact (112), the base plate assembly (12) comprises a base plate (121) and a stationary contact (122), the arc-extinguishing chamber (15) is mounted on the upper part of the assembly formed by the base assembly (11) and the base plate assembly (12), the moving contact (112) is connected to a busbar that protrudes from inside the base plate (121) to the lower part of the base plate (121), and the stationary contact (122) protrudes from inside the base plate (121) to the upper part of the base plate (121), characterized in that: It also includes a lead bus (14) and a universal circuit breaker transformer (13) as described in any one of claims 1 to 3. The lead bus (14) is installed and fixed on the stationary contact (122) and extends out of the base plate (121). The outer surface of the base plate (121) is provided with a transformer fixing feature corresponding to the base plate fixing feature on the transformer (13). The transformer (13) is fixed to the base plate (121) from the outside of the base plate (121) through the base plate fixing feature and the transformer fixing feature. The busbar extends out of the outer shape of the annular shell of the transformer (13) and is installed and fixed with the lead bus (14). The cavity (16) formed by the base plate (121) and the base (111) to accommodate the moving contact (112) is smaller at the bottom and larger at the top.
5. The universal circuit breaker according to claim 4, characterized in that: The outer surface of the base plate (121) is provided with vertically adjacent wide slits (1211) and narrow slits (1212) between each other.
6. The universal circuit breaker according to claim 4, characterized in that: The outer surface of the base plate (121) has a vertical wide slit (1211) between phases, and a vertical narrow slit (1212) is left between the L-shaped features (131) of the adjacent transformers (13).
7. The universal circuit breaker according to claim 4, characterized in that: The busbar uses a round busbar (1121).
8. The universal circuit breaker according to claim 4, characterized in that: The current transformer is fixed using screw holes, and the current transformer (13) is fixed to the base plate (121) from the outside of the base plate (121) through the screw holes.
9. A power distribution cabinet, characterized in that: Includes a phase partition (2) and a universal circuit breaker (1) as described in any one of claims 5 to 8. The phase partition (2) is installed between adjacent outgoing line bars (14) on the universal circuit breaker (1). A phase partition hook (21) is provided on the side of the phase partition (2) facing the universal circuit breaker (1). The phase partition hook is inserted into the wide slot (1211) and then fixed in the narrow slot (1212).
10. The power distribution cabinet according to claim 9, characterized in that: The phase spacer hook (21) of the phase spacer (2) is also inserted into the wide slot (1211) of the base plate (121) and then fixed in the narrow slot (1212) left between the L-shaped features (131) of the transformer (13).