Circuit breaker with contact system accessory

Abstract

A circuit breaker with a contact system accessory comprises a circuit breaker body and the contact system accessory, the wire outlet end of the contact system accessory is fixedly connected with the wire inlet end of the circuit breaker body, and the contact system accessory comprises a base, a static contact component, a moving contact component, an arc extinguish chamber, a flash barrier and a top cover. The moving contact components are installed in corresponding cavities at the wire inlet end of the base, the static contact components are installed in corresponding cavities at the wire outlet end of the base, the flash barriers are located between the wire inlet end and the moving contact components and located in the positions, above moving contacts of the cavities, of the arc extinguish chambers, and the top cover is installed above the base. According to the utility model, the problems that the total capacity and the energy density of the system are continuously increased and the rated working voltage is increased in the existing power utilization place, so that the circuit breaker in use cannot meet the requirement and needs to be replaced are solved, and the use cost of replacing the circuit breaker is saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a circuit breaker, especially a circuit breaker with contact system accessories. BACKGROUND

[0002] In the subsequent development of the power system, energy saving and efficiency will be the main theme of the future, the total capacity and energy density of the system will be continuously improved, and the rated working voltage of the power distribution protection electric appliance matched with the system will also be improved. In addition, in order to meet the market demand for higher performance of products, the performance of products needs to be continuously improved to improve the competitiveness of products. In order to save energy and increase efficiency, the development goal of high performance of the circuit breaker should be achieved as much as possible, so as to reduce the material cost of processing products, and also increase the difficulty of design and manufacture of the circuit breaker.

[0003] How to further improve the AC high voltage breaking performance of the circuit breaker has become a common problem faced by low-voltage component practitioners, which is an important, necessary and urgent industry problem. SUMMARY

[0004] In order to overcome the shortcomings of the prior art, in view of the problem that the rated working voltage of the existing circuit breaker is low and the breaking index cannot meet the market demand, the utility model provides a circuit breaker with contact system accessories, which adds a set of contact system accessories on the existing circuit breaker to form a new high-performance circuit breaker in combination with the existing circuit breaker.

[0005] The utility model solves the above-mentioned technical scheme adopted by the technical scheme:

[0006] A circuit breaker with contact system accessories, comprising a circuit breaker body and a contact system accessory, the outgoing end of the contact system accessory and the incoming end of the circuit breaker body are fixedly connected, the contact system accessory comprises a base, a static contact component, a moving contact component, an arc extinguishing chamber, an arc separation plate and a top cover, the moving contact component is installed in each corresponding cavity of the base incoming end, the static contact component is installed in each corresponding cavity of the base outgoing end, the arc separation plate is installed in the cooperating notch on the side of the base incoming end, is located above the moving contact in each cavity of the arc extinguishing chamber, and the top cover is installed above the base.

[0007] Further, the moving contact component comprises a moving terminal board, a moving contact rod, a moving contact point, a flexible connection, a contact spring and a contact bracket, one end of the moving contact rod is fixed with the moving contact point, the other end of the moving contact rod is fixed with one end of the flexible connection, and the other end of the flexible connection is fixed with one end of the moving terminal board; the static contact component comprises a static contact rod and a static contact point, and the static contact point is fixed at one end of the static contact rod; one end of the moving contact rod is provided with a rotating hole, and the side opposite to the fixed flexible connection of the moving contact rod is provided with a limiting boss; one end of the contact bracket is provided with rotating installation holes on the left and right side bending edges, and the contact shaft passes through the rotating hole of the moving contact rod, the contact spring and the rotating installation holes of the contact bracket.

[0008] Still further, the contact bracket and the moving contact rod are provided with limiting bosses at the contact positions, and the other end of the contact bracket is provided with left and right positioning flanges matched with the moving terminal board.

[0009] The contact bracket is installed above the moving terminal board, and the moving terminal board and the contact bracket are fixedly connected through the mounting screw.

[0010] Preferably, the contact spring is a double torsion spring, and the double torsion spring is installed above the contact bracket.

[0011] The utility model discloses the beneficial effect shows: the contact system accessory as a single unit module, can directly connect with the existing circuit breaker, and after connection, can be combined into a brand new double-break circuit breaker. Mainly satisfy the existing power place, the total capacity and energy density of system can improve unceasingly, and the rated working voltage promotion leads to the problem that the circuit breaker in use can not satisfy the requirement and needs to be replaced, saves the use cost of replacing the circuit breaker. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is the external view of the circuit breaker with the contact system accessory of the utility model.

[0013] Figure 2 It is the connection diagram of the circuit breaker with the contact system accessory of the utility model.

[0014] Figure 3 It is the schematic view of the panel of the utility model.

[0015] Figure 4 It is the structure diagram of the contact system accessory of the utility model.

[0016] Figure 5 It is the moving and static contact structure diagram of the contact system accessory of the utility model.

[0017] Figure 6 It is the moving and static contact part diagram of the contact system accessory of the utility model. DETAILED DESCRIPTION

[0018] The utility model is further described below with reference to the drawings.

[0019] Referring to Figures 1-6 A circuit breaker with contact system accessories, comprising a circuit breaker body 1, a contact system accessory 2 and a connecting screw 3, the circuit breaker body 1 is a conventional circuit breaker, the connecting hole 2a on the outgoing line end of the contact system accessory 2 and the connecting hole 1a on the incoming line end of the circuit breaker body are connected by the screw 3, and after connection, a brand-new double-break circuit breaker is formed.

[0020] Referring to Figure 4 The contact system accessory 2 comprises a base 22, a moving contact component 23, a static contact component 24, an arc extinguishing chamber 25, a top cover 26 and an arc separation plate 29, the moving contact component 23 is installed in the corresponding cavity on the incoming line end A, B and C of the base 22, the static contact component 24 is installed in the corresponding cavity on the outgoing line end A, B and C of the base 22, the arc separation plate 29 is installed in the corresponding notch on the incoming line end side of the base, the arc extinguishing chamber 25 is installed in the corresponding position above the moving contact of each cavity, and the top cover 26 is installed above the base 22 and connected by the installation screw.

[0021] Referring to Figure 5 And Figure 6 The moving contact component 23 comprises a moving terminal plate 231, a moving contact rod 232, a moving contact point 233, a flexible connection 234, a contact spring 235 and a contact bracket 236, one end of the moving contact rod 232 is welded with the moving contact point 233, the other end of the moving contact rod 232 is welded with the flexible connection 234, and the other end of the flexible connection 234 is welded with one end of the moving terminal plate 231; the static contact component 24 comprises a static contact rod 242 and a static contact point 241, the static contact point 241 is welded with one end of the static contact rod 242; one end of the moving contact rod after welding is provided with a rotating hole a3, and the side opposite to the welding of the flexible connection of the moving contact rod 232 is provided with a limiting boss a4; the contact bracket 26 is formed by stamping a metal sheet, one end of the contact bracket is provided with rotating installation holes on the left and right side bending edges, the contact bracket is provided with a limiting boss a1 at the contact a4 of the moving contact rod, and the other end of the contact bracket is provided with left and right positioning flanges a2 for limiting the moving terminal plate 231;

[0022] Further, the contact bracket 236 in the moving contact component 23 is installed above the moving terminal plate 231, the installation screw 28 is used for fixedly connecting the moving terminal plate and the contact bracket, the contact spring 235 is a double-torsion spring, the moving contact rod 232 is installed above the contact bracket 236, and the contact shaft 237 is used for connecting the moving contact rod, the contact spring and the shaft hole of the contact bracket.

[0023] In the embodiment, the contact system accessory is a single module unit, which can be directly connected and combined with the existing conventional circuit breaker, and after the combination, a new high-performance circuit breaker with double breaking points is formed, thereby meeting the demand of the market for higher performance of products.

[0024] The embodiments of the present application are only enumerations of the implementation forms of the utility model concept, and are only for the purpose of illustration. The protection scope of the present application should not be regarded as being limited to the specific forms stated in the embodiments, and the protection scope of the present application also extends to the equivalent technical means that can be thought of by those skilled in the art according to the concept of the present application.

Claims

1. A circuit breaker having a contact system accessory, characterized by, The circuit breaker comprises a circuit breaker body and a contact system accessory, the outgoing end of the contact system accessory is fixedly connected with the incoming end of the circuit breaker body, the contact system accessory comprises a base, a static contact component, a dynamic contact component, an arc extinguishing chamber, an arc separation plate and a top cover, the dynamic contact component is installed in each corresponding cavity of the incoming end of the base, the static contact component is installed in each corresponding cavity of the outgoing end of the base, the arc separation plate is installed in the corresponding slot on the side of the incoming end of the base, is located above the dynamic contact of each cavity of the arc extinguishing chamber and is installed above the base.

2. A circuit breaker having a contact system accessory according to claim 1, wherein, The dynamic contact component comprises a dynamic terminal plate, a dynamic contact rod, a contact shaft, a dynamic contact point, a flexible connection, a contact spring and a contact bracket, one end of the dynamic contact rod is fixed with the dynamic contact point, the other end of the dynamic contact rod is fixed with one end of the flexible connection, the other end of the flexible connection is fixedly connected with one end of the dynamic terminal plate; the static contact component comprises a static contact rod and a static contact point, the static contact point is fixed on one end of the static contact rod; one end of the dynamic contact rod is provided with a rotating hole, the side opposite to the fixed flexible connection of the dynamic contact rod is provided with a limiting boss; one end of the contact bracket is provided with rotating installation holes on the left and right bending edges, the contact shaft passes through the rotating hole of the dynamic contact rod, the contact spring and the rotating installation holes of the contact bracket.

3. A circuit breaker having a contact system accessory according to claim 2, wherein, The contact bracket and the dynamic contact rod are provided with limiting bosses at the contact position, the other end of the contact bracket is provided with left and right positioning flanges which are limited by the dynamic terminal plate.

4. A circuit breaker having a contact system accessory according to claim 2 or 3, characterized in that The contact bracket is installed above the dynamic terminal plate, and a mounting screw is used to fixedly connect the dynamic terminal plate and the contact bracket.

5. A circuit breaker having a contact system accessory according to either of claims 2 or 3, wherein, The contact spring is a double torsion spring, and the double torsion spring is installed above the contact bracket.

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