Operation tripping system of miniature circuit breaker

Abstract

The invention discloses an operation tripping system of a miniature circuit breaker. The system comprises a handle structure, a tripping assembly, a contact structure, a driving piece and a locking piece which are arranged on a shell, wherein the tripping assembly comprises a sliding block component movably arranged on the shell, the driving piece is rotatably connected with a rotating wheel and a moving contact component, the driving piece is in locking fit with the locking piece in the closing rotation process, and the rotating wheel drives the locking piece to release locking fit with the driving piece, so that the moving contact piece drives the driving piece to kick and make instant contact with the static contact. According to the invention, the miniature circuit breaker adopting the technical scheme has the characteristics of quickly switching on and switching off the circuit, reducing the fusion welding risk of the contact, being beneficial to shortening the arc extinguishing time, reducing the electric corrosion to the contact and prolonging the electrical service life, being capable of bearing high voltage compared with a traditional circuit breaker, being capable of well meeting the use requirement of a high-voltage circuit, reducing the setting cost, and improving the market competitiveness.

Description

technical field [0001] The invention relates to the technical field of low-voltage electrical appliances, in particular to an operation and tripping system of a miniature circuit breaker. Background technique [0002] The miniature circuit breaker is used in the power distribution system to connect or interrupt the load and protection circuit and the low-voltage protection device of the equipment. It not only has the function of manual switch, but also can automatically perform the functions of voltage loss, undervoltage, overload, and short circuit protection, so that it can be used to distribute electric energy, start asynchronous motors infrequently, and protect power lines and motors. It can automatically cut off the circuit in case of serious overload or short circuit and undervoltage faults. [0003] Traditional miniature circuit breakers are generally composed of electromagnetic protection system, thermal tripping system, arc extinguishing system, operating tripping ...

AI Technical Summary

Problems solved by technology

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the risk of fusion welding of the contacts caused by the slow connection speed of the miniature circuit breaker in the prior art, which does not have the ability to quickly connect high-voltage circuits; and the breaking speed of the circuit breaker Slow will cause electrical corrosion to the contacts, and it does not have the ability to quickly break high-voltage circuits, thus affecting the breaking capacity of the circuit breaker as a whole

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