Control and protection switch

Abstract

The invention discloses a control and protection switch which comprises a shell which is internally provided with a contactor unit for realizing automatic control, an operation unit for manually controlling switch-on and switch-off, and a contact unit which communicates with a circuit. The contactor unit comprises a moving iron core and an electromagnet. The operation unit comprises a driving member and a support member. The contact unit comprises a moving contact, a static contact and a reset spring. The control and protection switch is characterized in that one end of the driving member and the moving iron core are in linkage, the other end is connected to the support member, the supporting member is provided with a cavity with openings at two ends, the moving contact goes through the cavity which is close to the side of the driving member and presses against the moving contact, the reset spring is installed between the side wall of the cavity far from the driving member and the moving contact, and a barrier plate is arranged between the moving contact and the reset spring. The invention aims to provide the control and protection switch with close fit of moving and static contacts, rapid separation, low temperature rise, and long service life.

Description

technical field [0001] The present invention relates to a control and protection switch component, more particularly, it relates to a control and protection switch. Background technique [0002] The control and protection switch products adopt a modular single product structure type, integrating the main functions of traditional circuit breakers (fuse), contactors, overload (or overcurrent, phase failure) protection relays, starters, isolators, etc. It has the functions of remote automatic control and local direct manual control, panel indication and electromechanical signal alarm function, overvoltage and undervoltage protection function, phase failure and phase loss protection function, and coordinated time-current protection characteristics (with reverse Time limit, definite time limit and instantaneous three-stage protection characteristics). According to the need to choose functional modules or accessories, it can realize the control and protection of various motor loa...

AI Technical Summary

Problems solved by technology

[0005] In the above structure or the structure of ordinary control and protection switches, the static contacts are arranged between the housing and the moving contacts, and the springs fixed between the two are used as power parts, relying on the elastic force of the springs to make the moving contacts The contact and the static contact collide to form an electrical connection. When it is necessary to remotely control the disconnection of the contact, the moving iron core on the AC contactor acts to apply pressure to the moving contact to separate the moving contact from the static contact. Opening, but this structure only relies on the elastic force of the spring when closing, the joint between the static contact and the moving contact is not tight enough during the closing process, and when the static contact and moving The contact needs to compress the spring, resulting in the separation between the static contact and the moving contact is not fast enough, resulting in the defects of low contact action efficiency and temperature rise

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