High-breaking miniature circuit breaker

Abstract

The invention discloses a high-breaking miniature circuit breaker, which comprises a handle structure, a tripping assembly, a contact structure and a driving structure which are arranged in a shell, wherein the tripping assembly comprises a rotating wheel rotatably arranged in the shell, the driving structure comprises a driving plate rotatably abutted between the rotating wheel and a moving contact component, and locking plates respectively arranged on the rotating path of the driving plate and the rotating path of the rotating wheel, the driving plate and the locking plates form locking matching in the switching-on rotating process, and the rotating wheel drives the locking plates and the driving plate to release the locking matching, so that the moving contact component is in 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 a circuit, reducing the fusion welding risk of the contacts, being beneficial to shortening the arc extinguishing time between the moving contact and the static contact, reducing the electric corrosion to the contacts 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 requirements of a high-voltage circuit, and reducing the setting cost.

Description

technical field [0001] The invention relates to the technical field of low-voltage electrical appliances, in particular to a high breaking 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] When miniature circuit breakers are used in photovoltaic circuits, with the continuous development of the photovoltaic technology industry and the need for centralized power distribution, elec...

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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, does not have the ability to quickly break high-voltage circuits, and affects the breaking capacity of circuit breakers, so as to provide a fast connection and breaking circuit, improve the electrical life of the product, and can meet the use of high-voltage circuits. high breaking miniature circuit breaker

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