Auxiliary tripping unit of circuit breaker

Abstract

The invention relates to an auxiliary tripping unit of a circuit breaker and belongs to the technical field of miniature circuit breakers. The auxiliary tripping unit and an operating mechanism part of the circuit breaker are connected and mutually driven to play a role in auxiliary tripping and self-resetting, a magnetic flux converter and an auxiliary tripping mechanism are arranged on a modulebase, the auxiliary tripping mechanism comprises a reset lever, a module tripping rod and a module lock catch, the magnetic flux converter assists completion of tripping action through the action of the movable ejector rod and the auxiliary tripping mechanism, and meanwhile, the tripping mechanism is assisted to complete the reset action. Through the technical scheme of a secondary lock catch, theoutput of the release type electromagnet is amplified, the tripping force is increased, and the magnetic flux tripper can be reliably tripped under the condition of limited energy input, the magneticflux tripper is reset while tripping is carried out, so tripping and resetting functions are realized, manual reset is not needed, and the risk that the reset button is stuck is reduced, the output requirement of the electronic circuit board on the release is reduced, and reliability of the product tripping action is improved.

Description

technical field [0001] The invention relates to an auxiliary tripping unit of a circuit breaker, which belongs to the technical field of small circuit breakers. Background technique [0002] As an important part of power distribution protection, circuit breakers are widely used in the entire power distribution system. At present, electronic magnetic flux releases are often configured in miniature circuit breakers. The effective output of electronic magnetic flux releases is largely determined by the volume of the release and the output of the circuit board. When the output power of the circuit board is small, the magnetic flux release The output force value of the through release is not enough to directly drive the trip rod to trip, which affects the reliability of the trip. The tripping action needs to hit the trip lever with a greater force and a larger stroke, and the tripping action is more reliable. Therefore, in the technical field, it is currently necessary to solve...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the technical problems that the output force value of the magnetic flux release is not enough and the tripping reliability is not enough for a small circuit breaker equipped with an electronic magnetic flux release

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