Tripping assembly and circuit breaker

Abstract

The invention provides a tripping assembly and a circuit breaker, and belongs to the technical field of electrics. The tripping assembly is used for carrying out tripping operation on a lock catch of a circuit breaker operating mechanism, and comprises a tripper and an armature matched with the tripper; the armature comprises a suction part, a matching part and a balance weight part; the matching part and the balance weight part are connected to the two opposite sides of the suction part respectively, and the matching part and the balance weight part are coaxially and rotationally connected into a shell of the circuit breaker through a rotating shaft. A matching end extending in the direction away from the attraction part is formed on the matching part, the matching end is used for being matched with the lock catch, a balance weight end extending in the direction away from the attraction part is formed on the balance weight part, the balance weight end and the attraction part are located on the two opposite sides of the rotating shaft respectively, the release corresponds to the attraction part and is used for magnetically attracting the attraction part, and the rotating shaft is located at the gravity center of the armature. According to the circuit breaker, the internal structure of the circuit breaker can be more compact through the tripping assembly with a more compact structure, space waste is reduced, and hindrance of the tripping assembly to normal transmission of the circuit breaker operating mechanism is reduced.

Description

technical field [0001] The invention relates to the field of electrical technology, in particular to a tripping assembly and a circuit breaker. Background technique [0002] As a device that can close, carry and break current under normal or abnormal circuit conditions, circuit breakers are widely used in power transmission, power distribution and other fields. Usually, the circuit breaker realizes the breaking of the current under abnormal circuit conditions through the tripping components set inside it. [0003] The trip assembly usually includes a release and an armature matched with the release, wherein the release usually includes a thermal magnetic release, a liquid magnetic release, etc., and one end of the release is provided with a magnet that can attract the armature. The suction part is installed in the case of the circuit breaker by rotating the armature. When the circuit connected to the circuit breaker is abnormal, the magnetic force generated by the release c...

AI Technical Summary

Problems solved by technology

However, since one of the two ends of the armature is usually provided with a larger structure in order to cooperate with the magnetic attraction part of the release, the center of gravity (rotation center) of the entire armature is relatively close to the end that cooperates with the magnetic attraction part. Therefore, When the armature rotates under the action of magnetic force, the rotation stroke (swing range of the end) of one end matched with the lock is relatively large, resulting in a large overall space occupation of the trip assembly in the circuit breaker

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