Moving contact for circuit breaker

Abstract

The invention relates to a moving contact for a circuit breaker. The moving contact is in a sheet-shaped structure with a wide rear portion and a narrow front portion. A U-shaped and groove-shaped locking point is arranged at the rear portion of the moving contact, a rotating support point is arranged at the rear position of the middle of the moving contact, and the moving contact rotates around the support point to achieve connection and disconnection of the circuit breaker. A spring locating point is arranged between the rotating support point of the moving contact and the locking point, the distance between the locking point and the contact spring locating point is not larger than 9mm, and the distance of a vertical line passing through the buckle point to a contact face of the moving contact and the static contact is not larger than 2.5mm. The moving contact for the circuit breaker can obtain large opening distance only by changing parameters of the rotating support point of the moving contact, the contact spring locating support point and the like on the basis that connection rod operation mechanisms of the handle, a jumping pin and the like are not changed. The moving contact for the circuit breaker is simple in structure and reliable in movement, and connection and disconnection capacity of the circuit breaker can be remarkably improved by enlarging the opening distance between the moving contact and the static contact.

Description

technical field [0001] The invention relates to a moving contact of a circuit breaker. The moving contact can be realized by changing the parameters such as the rotating fulcrum of the moving contact and the positioning fulcrum of the contact tension spring without changing the connecting rod operating mechanism such as the handle and the jumper. A larger opening distance can be obtained. The moving contact has simple structure and reliable action, and the breaking capacity of the circuit breaker can be significantly improved by increasing the opening distance between the moving and static contacts. Background technique [0002] The structure of a circuit breaker generally includes terminal blocks, magnetic tripping system, thermal tripping system, contact system and arc extinguishing system, among which the contact system is one of the most important components of the circuit breaker, and the contact system generally includes fixed installation The static contact and the m...

AI Technical Summary

Problems solved by technology

However, to increase the opening distance of the dynamic and static contacts, it is necessary to increase the volume of the circuit breaker to a certain extent, and the current circuit breaker is increasingly developing in the direction of miniaturization and compactness, so it is impossible to achieve a large opening distance by increasing the volume of the circuit breaker Therefore, how to increase the opening distance of the dynamic and static contacts without increasing the volume of the circuit breaker, and then improve the breaking capacity of the circuit breaker has become one of the hot spots and key issues of current research.

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