Residual current operated circuit breaker
By designing the connection part, extension part and mounting part of the stationary contact at the line end to be integrally formed, the problem of insufficient length of existing circuit breakers when large currents pass through is solved, and higher current carrying capacity and effective arc extinguishing are achieved.
Patent Information
- Application Number
- CN202520382591.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-06
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2035-03-06
AI Technical Summary
The existing residual current operated circuit breakers have the same length of stationary contact at the outgoing end as at the incoming end, which results in a deficiency when carrying large currents.
The design of the outgoing stationary contact includes a connecting part, an extension part, and a mounting part. Its length is increased by extrusion molding, and a suitable cavity is set in the contact box. The extension part is located between the connecting part and the mounting part. The outgoing stationary contact and the incoming stationary contact are mirror images of each other in the vertical direction.
This effectively increases the length of the stationary contact at the outgoing end, enabling large current to pass through, improving the current carrying capacity of the circuit breaker, and ensuring the effective guidance and extinguishing of the electric arc.
Smart Images
Figure CN223858120U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to circuit breaker technical field, concretely is a kind of residual current operated circuit breaker. BACKGROUND
[0002] Residual current operated circuit breaker is a kind of electrical equipment for leakage protection. It can detect leakage current in line, and can quickly cut off fault circuit. Residual current operated circuit breaker is usually composed of two parts: automatic circuit breaker and leakage protection device. Automatic circuit breaker mainly plays the protection role to short circuit and overload, and leakage protection device realizes the protection to personal safety by detecting leakage current in loop.
[0003] In prior art, the length of outgoing line end static contact part and incoming line end static contact of residual current operated circuit breaker are same and are conventionally set, and there is certain disadvantage when passing large current. UTILITY MODEL CONTENT
[0004] The utility model aims at providing a kind of residual current operated circuit breaker to solve the problems presented in the above background.
[0005] To achieve the above object, the utility model provides the following technical scheme: a kind of residual current operated circuit breaker, including shell and the contact box being assembled in the shell, the contact box two sides are respectively equipped with a outgoing line end static contact and a incoming line end static contact, the outgoing line end static contact includes connecting portion, extension and installation part, wherein installation part is overall U-shaped structure, the cavity that is adapted with this U-shaped installation part is provided in the contact box, the extension is located between connecting portion and installation part and three are integrally formed by extrusion.
[0006] Preferably, the extension and connecting portion are located outside the contact box, and a concave mounting track is provided below the contact box.
[0007] Preferably, a contact point is provided on one side of the installation part.
[0008] Preferably, the incoming line end static contact is also provided with a U-shaped structure, and a contact point is provided on the side of the U-shaped structure.
[0009] Preferably, the outgoing line end static contact and the incoming line end static contact are arranged in a mirror image in the vertical direction.
[0010] Compared with the prior art, the utility model has the beneficial effects that: by adding the extension to connect the connecting portion and the installation part and adopting extrusion integral molding, the length of the outgoing line end static contact is effectively increased, and large current passing is realized. BRIEF DESCRIPTION OF DRAWINGS
[0011] Figure 1It is the internal structure schematic view of the utility model embodiment;
[0012] Figure 2 It is the installation structure schematic view of the contact box, the outgoing line end static contact and the incoming line end static contact of the utility model embodiment;
[0013] Figure 3 It is the sectional view of the contact box, the outgoing line end static contact and the incoming line end static contact of the utility model embodiment;
[0014] Figure 4 It is the internal structure schematic view of the contact box of the utility model embodiment;
[0015] Figure 5 It is the structure schematic view of the outgoing line end static contact of the utility model embodiment.
[0016] In the drawing,
[0017] 10, shell, 20, contact box, 201, cavity, 202, installation rail, 30, outgoing line end static contact, 30a, connecting part, 30b, extension, 30c, installation part, 40, incoming line end static contact. Specific implementation
[0018] The technical scheme in the utility model embodiments will be clearly and completely described below with reference to the drawings in the utility model embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model and not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.
[0019] Please refer to Figures 1-5 A residual current circuit breaker, comprising a shell 10 and a contact box 20 assembled in the shell 10, the contact box 20 is respectively assembled with an outgoing line end static contact 30 and an incoming line end static contact 40 on both sides, the outgoing line end static contact 30 comprises a connecting part 30a, an extension 30b and an installation part 30c, wherein the installation part 30c is integrally formed in U-shaped structure, the contact box 20 is provided with a cavity 201 matched with the U-shaped installation part 30c, and the extension 30b is located between the connecting part 30a and the installation part 30c and is integrally formed by extrusion.
[0020] It should be noted that the connecting part 30a and the installation part 30c are connected by adding the extension 30b and integrally formed by extrusion, which effectively increases the length of the outgoing line end static contact 30 and realizes large current passing.
[0021] The extension 30b and the connecting part 30a are located outside the contact box 20, and the contact box 20 is provided with an inner recessed installation rail 202 below.
[0022] It should be noted that a protruding crossbeam is provided inside the housing 10. The mounting rail 202 at the lower end of the contact box 20 is snapped onto the protruding crossbeam to complete the assembly of the contact box 20. The extension 30b is provided on the outside of the contact box 20 to facilitate wiring. At the same time, the extension 30b is extended to meet special requirements.
[0023] A contact point is provided on one side of the mounting part 30c.
[0024] It should be noted that the arc is extinguished by means of a contact located in the arc-extinguishing chamber.
[0025] The incoming terminal stationary contact 40 is also provided with a U-shaped structure, and a contact point is provided on the side of the U-shaped structure.
[0026] It should be noted that the arc is extinguished by means of a contact located in the arc-extinguishing chamber.
[0027] The outgoing stationary contact 30 and the incoming stationary contact 40 are mirror images of each other in the vertical direction.
[0028] It should be noted that the corresponding incoming and outgoing parts are connected by the outgoing stationary contact 30 and the incoming stationary contact 40. The mirrored setting makes the wiring of this part located on one top and one bottom for easy differentiation.
[0029] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
Claims
1. A residual current circuit breaker, characterized in that: it comprises a housing and a contact box assembled in the housing, and one outgoing line static contact and one incoming line static contact are respectively assembled on both sides of the contact box, the outgoing line static contact comprises a connecting part, an extending part and a mounting part, the mounting part is in a U-shaped structure as a whole, a cavity is arranged in the contact box and is matched with the U-shaped mounting part, and the extending part is located between the connecting part and the mounting part and is integrally formed by extrusion.
2. The residual current operated circuit breaker according to claim 1, characterized in that: The extending part and the connecting part are located outside the contact box, and a concave mounting track is arranged below the contact box.
3. The residual current operated circuit breaker according to claim 1, characterized in that: A contact point is arranged on one side of the mounting part.
4. The residual current operated circuit breaker according to claim 1, characterized in that: The incoming line static contact also has a U-shaped structure, and a contact point is arranged on the side of the U-shaped structure.
5. The residual current circuit breaker according to claim 1, characterized in that: The outgoing line static contact and the incoming line static contact are arranged in a mirror image in the upward and downward directions.