Bridge contact with resistance

Abstract

This utility model relates to a bridge-type contact with a resistor. The technical problem this utility model aims to solve is to provide a bridge-type contact with a resistor. The technical solution adopted by this utility model includes a stationary contact bridge, stationary contacts disposed on the stationary contact bridge, and a resistor. The stationary contact includes a stationary contact contact portion that mates with the moving contact and a stationary contact riveting portion for riveting. The stationary contact bridge includes a stationary contact bridge body, with both ends of the body extending horizontally outward to form a stationary contact bridge mating portion. The mating portion of the stationary contact bridge has a stationary contact bridge riveting hole for the riveting portion to pass through, and the inner wall of the riveting hole has a stationary contact bridge wire-holding groove. The advantages of this utility model are: a resistor connected in parallel between the two stationary contacts forms a high-resistance channel, suppressing the differential mode voltage between the entire pair of contacts, resulting in a more uniform arc current distribution, preventing one side from triggering breakdown first, and providing good arc suppression; the resistor holder supports the resistor, preventing it from shaking or falling off.

Description

Technical Field

[0001] This utility model relates to a bridge-type contact with resistance. Background Technology

[0002] Bridge-type contacts are a common contact structure in high-voltage electrical equipment such as circuit breakers and disconnectors. They typically consist of a one-piece conductive bridge plate and stationary contacts at both ends of the bridge plate, forming a contact path with the mating moving contacts to achieve the connection or disconnection of the main circuit. Existing bridge-type contacts are prone to generating a strong electric arc at the moment of contact closure, especially in scenarios involving large currents or inductive load switching. This arc not only causes surface erosion and adhesion of the contacts but also exacerbates temperature rise, reducing contact lifespan and switching reliability. Existing bridge-type contacts cannot effectively suppress the arc or evenly suppress the voltage difference between the two symmetrical contacts; the arc may still concentrate on one side of the contact. Improvements and optimizations are needed to address these issues. Utility Model Content

[0003] To solve the above problems, the technical problem to be solved by this utility model is to provide a bridge-type contact with resistance.

[0004] The technical solution adopted by the bridge-type contact with resistor of this utility model is characterized by including a stationary contact bridge, stationary contacts provided on the stationary contact bridge, and a resistor. The stationary contact includes a stationary contact contact portion that docks with the moving contact and a stationary contact riveting portion for riveting. The stationary contact bridge includes a stationary contact bridge body, and the two ends of the stationary contact bridge body extend horizontally outward to form stationary contact bridge docking portions. The stationary contact bridge docking portions are provided with stationary contact bridge riveting holes for the stationary contact riveting portions to pass through. The inner wall of the stationary contact bridge riveting holes is provided with stationary contact bridge wire-holding grooves. The middle part of the stationary contact bridge body is provided with a stationary contact bridge main clearance hole. The stationary contact bridge is provided with a stationary contact bridge positioning groove, one end of which communicates with the stationary contact bridge wire-holding groove and the other end of which communicates with the stationary contact bridge main clearance hole. The resistor includes a resistor body and resistor wires provided at both ends of the resistor body. The resistor wires pass through the stationary contact bridge positioning groove and are wound around the stationary contact bridge wire-holding groove, and their ends contact the stationary contacts.

[0005] The width of the static contact bridge slot is smaller than the diameter of the resistor wire.

[0006] It also includes a resistor receiving base, which includes a receiving base body. The receiving base body is provided with a receiving base limiting groove that is open to the left and right and is used for receiving the resistor body. The middle part of the stationary contact bridge body is provided with a stationary contact bridge recessed groove for mounting the receiving base body. The bottom of the stationary contact bridge recessed groove is provided with the stationary contact bridge main clearance hole.

[0007] The bottom of the main body of the receiving seat is provided with an elastic retaining foot for locking onto the static contact bridge after passing through the main clearance hole of the static contact bridge.

[0008] The static contact bridge body has symmetrically arranged L-shaped docking blocks at its front and rear ends, and a static contact bridge socket for docking with the circuit breaker base is formed between the two L-shaped docking blocks.

[0009] The advantages of this utility model of a bridge-type contact with a resistor are as follows: a high-resistance channel is formed by connecting a resistor in parallel between two stationary contacts, which suppresses the differential mode voltage between the entire pair of contacts, resulting in a more uniform arc current distribution, avoiding the first triggering of breakdown on one side, and achieving a good arc suppression effect; the resistor holder supports the resistor, preventing it from shaking or falling off. Attached Figure Description

[0010] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0011] Figure 1 This is a schematic diagram of the structure of the bridge-type contact with resistance of this utility model;

[0012] Figure 2 This is a schematic diagram of the static contact bridge of this utility model;

[0013] Figure 3 This is a schematic diagram of the static contact of this utility model;

[0014] Figure 4 This is a schematic diagram of the structure of the resistor of this utility model;

[0015] Figure 5 This is a schematic diagram of the resistor holder of this utility model. Detailed Implementation

[0016] like Figure 1-5As shown, the present invention relates to a bridge-type contact with resistance, comprising a stationary contact bridge 1, stationary contacts 2 and a resistor 3 disposed on the stationary contact bridge 1. The stationary contact 2 includes a stationary contact contact portion 13 that abuts with the moving contact and a stationary contact riveting portion 14 for riveting. The stationary contact bridge 1 includes a stationary contact bridge body 6, with both ends of the stationary contact bridge body 6 extending horizontally outward to form stationary contact bridge mating portions 7. The stationary contact bridge mating portions 7 are provided with stationary contact bridge riveting holes 8 for the stationary contact riveting portions 14 to pass through. The inner wall of the stationary contact bridge riveting holes 8 is provided with a stationary contact bridge wire-holding groove 10. A stationary contact bridge main clearance hole 9 is provided in the middle of the stationary contact bridge body 6. The stationary contact bridge 1 is provided with one end communicating with the stationary contact bridge wire-holding groove 10 and the other end communicating with the stationary contact bridge main clearance hole 9. The stationary contact bridge positioning groove 11 is connected to hole 9. The resistor 3 includes a resistor body 15 and resistor wires 16 disposed at both ends of the resistor body 15. The resistor wires 16 pass through the stationary contact bridge positioning groove 11 and are wound around the stationary contact bridge wire clamping groove 10, and their ends are in contact with the stationary contact 2. The two stationary contacts are in contact with the moving contacts respectively. The resistor is connected between the two stationary contacts, which is equivalent to connecting a high-resistance channel in parallel between the two moving contacts. It suppresses the differential mode voltage between the entire pair of contacts, which is more effective than connecting a resistor at a single point. Since the structure is a double contact in parallel, the resistor connection method ensures that the resistor provides the same "buffering" effect for the two branches, the arc current distribution is more uniform, and it avoids one side triggering breakdown first, resulting in a good arc suppression effect.

[0017] The width of the static contact bridge slot 10 is smaller than the diameter of the resistor wire 16, forming a strong interference fit, which effectively prevents poor contact caused by loose wires.

[0018] It also includes a resistor receiving base 4, which includes a receiving base body 18. The receiving base body 18 is provided with a receiving base limiting groove 19 that is open to the left and right and is used to receive the resistor body 15. The middle part of the stationary contact bridge body 6 is provided with a stationary contact bridge recessed groove 21 for the installation of the receiving base body 18. The bottom of the stationary contact bridge recessed groove 21 is provided with a stationary contact bridge main clearance hole 9, which supports the resistor and prevents the resistor from shaking or falling off.

[0019] The bottom of the receiving body 18 is provided with a receiving elastic locking foot 20 for passing through the main clearance hole 9 of the static contact bridge and locking onto the static contact bridge 1. The elastic locking foot 20 enables quick installation and removal, reducing the use of fasteners.

[0020] The static contact bridge body 6 is provided with symmetrically arranged L-shaped docking blocks 23 at its front and rear ends. The two L-shaped docking blocks 23 form a static contact bridge socket 24 that docks with the circuit breaker base, which enhances the stability of the fit with the circuit breaker base and prevents loosening.

[0021] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model are included within the protection scope of the present utility model.

Claims

1. A bridge-type contact with resistance, characterized in that: The system includes a stationary contact bridge (1), stationary contacts (2) and a resistor (3) provided on the stationary contact bridge (1). The stationary contacts (2) include a stationary contact contact portion (13) that mates with the moving contact and a stationary contact riveting portion (14) for riveting. The stationary contact bridge (1) includes a stationary contact bridge body (6). The two ends of the stationary contact bridge body (6) extend horizontally outward to form stationary contact bridge mating portions (7). The stationary contact bridge mating portions (7) are provided with stationary contact bridge riveting holes (8) for the stationary contact riveting portions (14) to pass through. The inner wall of the stationary contact bridge riveting holes (8) is provided with stationary contact bridge wire clamping grooves. (10) The main body (6) of the static contact bridge is provided with a main clearance hole (9) in the middle. The static contact bridge (1) is provided with a static contact bridge positioning groove (11) with one end connected to the static contact bridge wire clamping groove (10) and the other end connected to the main clearance hole (9). The resistor (3) includes a resistor body (15) and resistor wires (16) provided at both ends of the resistor body (15). The resistor wires (16) pass through the static contact bridge positioning groove (11) and are wound around the static contact bridge wire clamping groove (10), and their ends are in contact with the static contact point (2).

2. The bridge-type contact with resistance according to claim 1, characterized in that: The width of the static contact bridge slot (10) is smaller than the diameter of the resistor wire (16).

3. The bridge-type contact with resistance according to claim 1, characterized in that: It also includes a resistor receiving base (4), which includes a receiving base body (18). The receiving base body (18) is provided with a receiving base limiting groove (19) that is open to the left and right and is used for receiving the resistor body (15). The middle part of the stationary contact bridge body (6) is provided with a stationary contact bridge recessed groove (21) for installing the receiving base body (18). The bottom of the stationary contact bridge recessed groove (21) is provided with the stationary contact bridge main clearance hole (9).

4. The bridge-type contact with resistance according to claim 3, characterized in that: The bottom of the receiving seat body (18) is provided with a receiving seat elastic locking foot (20) for passing through the main clearance hole (9) of the static contact bridge and locking onto the static contact bridge (1).

5. The bridge-type contact with resistance according to claim 1, characterized in that: The static contact bridge body (6) has symmetrically arranged L-shaped docking blocks (23) at its front and rear ends, and a static contact bridge socket (24) for docking with the circuit breaker base is formed between the two L-shaped docking blocks (23).

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