Electromagnetic breaker tripping mechanism

Abstract

This invention relates to electromagnetic tripping mechanism for circuit breaker, which comprises an iron core composed of tripping iron core and impact iron core, moving contact groupware matched with iron core, and tripping coil arranged out the iron core; wherein, the front end of tripping iron core crosses control contact groupware of impact iron core, the corresponding back end props up to reset spring propped to magnet yoke; arranging reset spring for impact iron core between the two iron cores. The invention overcomes the shortcoming in existing product, has strong protection function and stable closure state.

Description

technical field [0001] The invention relates to a circuit breaker tripping mechanism, in particular to an electromagnetic circuit breaker tripping mechanism. Background technique [0002] The tripping mechanism, as the executive mechanism for the circuit breaker to separate the static contact and the moving contact to disconnect the circuit when the circuit is abnormal, is the main component of the circuit breaker socket. The tripping mechanism is divided into a mechanical tripping mechanism and an electromagnetic tripping mechanism. The electromagnetic tripping mechanism includes: an electromagnetic part for generating electromagnetic force; an armature that is slidably installed in the electromagnetic part and can move under the action of electromagnetic force; The frame body connected with the armature is driven by the armature to move between the first position and the second position along the axis of the electromagnet, and the frame body separates or contacts the movin...

AI Technical Summary

Problems solved by technology

This electromagnetic tripping mechanism has the following defects: First, the frame body pushes the moving contact piece to contact the static contact piece through the bump, and the arm of the moving contact piece needs a certain length, which easily causes the moving contact piece and the static contact piece to be in contact with each other. The contact is unstable and bad; the second is to use the permanent magnet as the lock to fix the armature in the second position, and use the magnetic force of the permanent magnet as the holding force when the ground fault circuit breaker is closed, which requires the permanent magnet to have sufficient magnetic force to attract Correspondingly, when there is a fault current, the electromagnetic part should also have enough electromagnetic force to move the armature, so that the armature and the permanent magnet are separated and returned to the first position. Due to the elastic force of the moving contact piece, the moving contact piece and the static contact piece Separation, which easily causes the failure of the circuit breaker to trip and fail

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