Rapid tripping device

Abstract

The invention discloses a rapid tripping device which comprises a mechanism support, a connecting rod device, a contact connecting rod, a main shaft, a moving contact, a static contact, a jump pin anda lock catch assembly device. One end of the jump pin is in lap joint with the lock catch assembly device, the other end of the jump pin is connected with the mechanism support through a rotating shaft, and the moving contact and the static contact make contact with each other in a non-overload state. In the over-loaded state, due to existence of electrodynamic repulsion, the acting force of thejump pin on the buckle surface on the lock catch assembly device is suddenly increased, so the lock plate overcomes the pressure of the lock catch pressure spring to deflect upwards; and the push surface pushes a second lock catch to rotate clockwise, the position of a first lock catch assembly is unlocked after the second lock catch rotates clockwise, the first lock catch assembly rotates clockwise, the buckle surface is separated from the jump pin, the jump pin rotates anticlockwise, the tripping process is completed, and the contact is opened.

Description

technical field [0001] The invention relates to the field of low-voltage electrical components and equipment, in particular to a mechanism of a current-limiting molded case circuit breaker. Background technique [0002] At present, molded case circuit breakers (MCCB, hereinafter referred to as circuit breakers) are commonly used in low-voltage power distribution systems to connect and break loads, protect the safety of lines and equipment, and belong to the category of low-voltage electrical appliances. [0003] The short-circuit breaking performance of a circuit breaker depends on various factors such as the opening time of the contacts, the speed of the contact movement, and the performance of the arc extinguishing chamber. In the case of other factors being the same, the earlier the circuit breaker contacts are opened, the better its short-circuit breaking performance will be. [0004] There are several kinds of short-circuit breaking processes of molded case circuit bre...

AI Technical Summary

Problems solved by technology

[0013] However, this structural arrangement often hinders the pursuit of the volume ratio of the circuit breaker and affects the realization of integration and modularization; in addition, the heat generated by the circuit breaker during operation and the electromagnetic field generated under high current conditions may affect The tripping function of the circuit breaker; in addition, since the two components need to be assembled separately, it will increase the cumbersome assembly work and affect the improvement of assembly efficiency

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