Static contact of circuit breaker

Abstract

The utility model relates to a static contact, in particular to a static contact of a circuit breaker, which comprises a static contact with a U-shaped structure formed by an L-shaped first bending part and a straight part, and an L-shaped second bending part is arranged on one side of the static contact and opposite to the other side of the first bending part. A protective cover which at least partially covers the first bending part, the straight part and the second bending part is arranged above the static contact, the continuous insulating protective cover is arranged on the static contact, the protective cover directly covers the first bending part, the straight part and the second bending part of the static contact, the air-blowing cooling and insulating effects are better, and the service life of the static contact is prolonged. The utility model also has the characteristics of simple structure, convenience in processing and easiness in assembly, and has strong practicability.

Description

Technical Field

[0001] The utility model relates to a static contact, in particular to a static contact of a circuit breaker. Background Art

[0002] The main task of the molded case circuit breaker is to protect the circuit system when a short circuit occurs. It is mainly composed of a casing, a static contact, a moving contact, an arc extinguishing chamber and an operating mechanism. For example, the patent with publication number CN206059323U, named "molded case circuit breaker and its static contact", does not have any protection measures, and the product breaking test is not good. How to improve the breaking test effect of the static contact is the technical problem we need to solve now. Utility Model Content

[0003] In view of the deficiencies in the existing technology, the utility model provides a static contact of a circuit breaker.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a static contact of a circuit breaker, characterized in that it includes a static contact with a U-shaped structure formed by an L-shaped first bent portion and a straight portion, an L-shaped second bent portion is provided on one side of the static contact and at the other side relative to the first bent portion, and a protective cover is provided above the static contact, which at least partially covers the first bent portion, the straight portion and the second bent portion.

[0005] The protective cover is fixedly positioned on the static contactor by sleeve arrangement.

[0006] The protective cover is made of plastic.

[0007] An arc-starting piece bent toward the straight portion is provided above the first bent portion.

[0008] The arc-starting piece is a Z-shaped structure, one end of the arc-starting piece is fixed to the end surface of the first bending portion, and the other end is close to the straight portion.

[0009] The arc-starting piece is fixedly connected to the first bending portion by fastening with rivets.

[0010] The straight portion is provided with a first screw hole for fixing on the base.

[0011] The number of the first screw hole is one.

[0012] The second bent portion is provided with a straight section for being matched and fixed to the base, and the straight section is provided with two second screw holes.

[0013] The two second screw holes are respectively arranged at the edge positions close to the two sides of the straight section, and an extension portion extending outward is arranged on the static contact and relative to the edge positions.

[0014] Beneficial effects of the utility model: the utility model arranges a continuous insulating protective cover on the static contact, which directly covers the first bending portion, the straight portion and the second bending portion of the static contact, and air blowing cooling and insulation effect are better. The utility model also has the characteristics of simple structure, convenient processing and easy assembly, and is highly practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 It is a structural exploded diagram of the utility model;

[0017] Figure 3 It is a schematic diagram of the structure of the utility model after the protective cover is hidden. DETAILED DESCRIPTION

[0018] like Figure 1-Figure 3 As shown, a static contact of a circuit breaker includes a static contact 100 of a U-shaped structure formed by an L-shaped first bent portion 110 and a straight portion 120, an L-shaped second bent portion 130 is provided on one side of the static contact 100 and at the other side relative to the first bent portion 110, and a protective cover 200 is provided above the static contact 100, which at least partially covers the first bent portion 110, the straight portion 120 and the second bent portion 130, and is arranged to form a U-shaped structure. When current passes through, there is an electric repulsive force, and the moving contact knife can be repelled. The moving knife can be opened quickly, thereby improving the current limiting ability of the product.

[0019] The protection cover 200 is fixedly positioned on the static contact 100 by sleeve arrangement, and the protection cover 200 can be directly put on, which is convenient for assembly and disassembly.

[0020] The protective cover 200 is made of plastic material, and it is recommended to use nylon synthetic material for the protective cover 200, which has a better protective effect.

[0021] An arc-starting piece 300 is disposed above the first bent portion 110 and is bent toward the straight portion 120 . The purpose of bending downward is to allow the arc-starting piece 300 to extend further into the grid piece.

[0022] The arc-striking piece 300 is a Z-shaped structure, one end of the arc-striking piece 300 is fixed to the end surface of the first bending portion 110 , and the other end is close to the straight portion 120 .

[0023] The arc-starting piece 300 is fixedly connected to the first bending portion 110 by means of rivet fastening, and the rivet fastening method makes the connection more stable.

[0024] The straight portion 120 is provided with a first screw hole 121 for fixing to the base, and the first screw hole 121 is used for screwing the stationary contact 100 .

[0025] The number of the first screw hole 121 is one, and the number of the first screw hole 121 is preferably one, which is compatible with assembly difficulty and connection stability.

[0026] The second bent portion 130 is provided with a straight section 131 for being fixed to the base. The straight section 131 is provided with two second screw holes 132. Together with the first screw hole 121 of the straight portion 120, three screw holes are used to fix the static contact 100, and the structure is firm.

[0027] The two second screw holes 132 are respectively arranged at the edge positions close to both sides of the straight section 131, and an outwardly extending extension portion 133 is provided on the static contact 100 and relative to the edge position to increase the contact area between the static contact 100 and the wiring copper busbar, reduce the temperature rise here, and improve the temperature rise performance.

[0028] The above shows and describes the basic principle, main features and advantages of the utility model. The technicians in this industry should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, simple changes and substitutions by ordinary technicians in this field are within the protection scope of the utility model.

Claims

1. A static contact of a circuit breaker, characterized in that: The invention comprises a stationary contact (100) having a U-shaped structure formed by an L-shaped first bent portion (110) and a straight portion (120); an L-shaped second bent portion (130) is provided on one side of the stationary contact (100) and at the other side relative to the first bent portion (110); and a protective cover (200) is provided above the stationary contact (100) and at least partially covers the first bent portion (110), the straight portion (120) and the second bent portion (130).

2. A static contact of a circuit breaker according to claim 1, characterized in that: The protective cover (200) is fixedly positioned on the stationary contact (100) by means of sleeve arrangement.

3. A static contact of a circuit breaker according to claim 2, characterized in that: The protective cover (200) is made of plastic.

4. A static contact of a circuit breaker according to claim 1, characterized in that: An arc-starting sheet (300) is provided above the first bent portion (110) and is bent in the direction of the straight portion (120).

5. A static contact of a circuit breaker according to claim 4, characterized in that: The arc-striking piece (300) is a Z-shaped structure, one end of the arc-striking piece (300) is fixed to the end surface of the first bent portion (110), and the other end is close to the straight portion (120).

6. A static contact of a circuit breaker according to claim 4, characterized in that: The arc-starting piece (300) and the first bent portion (110) are fixedly connected by means of rivet fastening.

7. A static contact of a circuit breaker according to any one of claims 1 to 6, characterized in that: The straight portion (120) is provided with a first screw hole (121) for fixing to a base.

8. A static contact of a circuit breaker according to claim 7, characterized in that: The number of the first screw hole (121) is one.

9. A static contact of a circuit breaker according to claim 8, characterized in that: The second bent portion (130) is provided with a straight section (131) for being matched and fixed to the base, and the straight section (131) is provided with two second screw holes (132).

10. A static contact of a circuit breaker according to claim 9, characterized in that: The two second screw holes (132) are respectively arranged at edge positions close to both sides of the straight section (131), and an outwardly extending extension portion (133) is provided on the stationary contact (100) relative to the edge position.

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