Automatic reclosing device of miniature circuit breaker

Abstract

The invention relates to an automatic reclosing lock device of a miniature circuit breaker. The automatic reclosing lock device of the miniature circuit breaker comprises a base, an upper cover, a transmission mechanism, a tripping mechanism and an electronic control unit, wherein the transmission mechanism comprises a reversing motor, an angle gear arranged on a rotating shaft of the reversing motor, a bevel gear meshed with the angle gear, a closing brake micro-switch and a separating brake micro-switch, wherein an universal driving shaft is arranged on the lower end face of the bevel gear, one end of the universal driving shaft penetrates through an installation hole in the base and connected to an operating handle of the miniature circuit breaker, and a manual operation switching mechanism / an automatically switching mechanism are arranged on the base, corresponding to the bevel gear; the tripping mechanism comprises a iron core, a coil, a tripping shaft, a tripping piece and a photosensitive element, wherein one end of the tripping shaft is arranged in an arc hole, and the other end of the tripping shaft is connected to a moving contact support of the miniature circuit breaker; the electronic control unit controls the reversing motor to rotate forwards, to rotate backwards and to stop the motion, and the bevel gear is driven to achieve the automatic reclosing lock motion of the miniature circuit breaker. The automatic reclosing lock device of the miniature circuit breaker has the advantages of being simple in structure, and stable in performance.

Description

technical field [0001] The invention relates to a small circuit breaker, in particular to an automatic reclosing device for a small circuit breaker. Background technique [0002] At present, miniature circuit breakers are mainly used in various places such as industry, commerce, high-rise buildings and residential buildings. With the development of my country's smart grid, it is more and more urgent to realize the intelligent control of electrical appliances under the premise of requiring the safe operation of the grid. Miniature circuit breakers are widely used in the existing low-voltage power distribution system to protect the lines in the power supply system from damage. When faults such as phase-to-phase short circuit and short-term power failure occur, the miniature circuit breaker will automatically trip to achieve the task of protection. Although this technical solution has the function of protecting the electric line and its equipment, when the fault is eliminated, ...

AI Technical Summary

Problems solved by technology

Miniature circuit breakers are widely used in the existing low-voltage power distribution system to protect the lines in the power supply system from damage. When faults such as phase-to-phase short circuit and short-term power failure occur, the miniature circuit breaker will automatically trip to achieve the task of protection. Although this technical solution has the function of protecting the electric line and its equipment, when the fault is eliminated, the user or the staff needs to manually close the switch to transmit power. This small circuit breaker has the defects of not being able to transmit power in time and wasting manpower. Cannot adapt to the development needs of grid intelligence

Although there are miniature circuit breakers with reclosing function on the market, the structure design of the transmission mechanism of the reclosing device of the miniature circuit breaker is relatively complicated, and there are defects of high production cost and unstable performance. When the small circuit breaker needs to trip quickly, the transmission mechanism of the circuit breaker is not sensitive, which will cause serious safety hazards and cannot guarantee the safety of electricity consumption for users

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