Digital miniature circuit breaker capable of automatically opening and closing

Abstract

The invention discloses a digital miniature circuit breaker capable of automatically opening and closing. The digital miniature circuit breaker comprises a main loop, a detection unit, a control module, an opening and closing coil control unit, an action unit and an execution mechanism. The action unit comprises an opening and closing coil and a movable iron core, the opening and closing coil is connected with current through an opening and closing coil control unit, and the movable iron core is in transmission connection with the execution mechanism; the detection unit is electrically connected with the control module, the output end of the control module is electrically connected with the opening and closing coil control unit, and the opening and closing coil control unit changes the flow direction of current flowing through the opening and closing coil according to received control signals of the control module and drives the movable iron core to drive the executing mechanism to be opened or closed. According to the miniature circuit breaker, an electric operation module does not need to be introduced, automatic switching-on and switching-off functions can be achieved through a single coil, the miniature circuit breaker has a large current range while product miniaturization is kept, automatic switching-on and switching-off control is achieved for the first time within the width of 18 mm, the full range of 1-128A is supported, remote control can be achieved, and the miniature circuit breaker has great practical value.

Description

technical field [0001] The present invention relates to the electrical field, in particular to a circuit breaker. Background technique [0002] A circuit breaker is an electrical device used to control and protect circuits. It can automatically open and cut off the circuit when the circuit fails. [0003] In the prior art, since the miniature circuit breaker itself cannot realize the automatic closing function, it must rely on an additional electrical operation module to realize the closing function, regardless of whether the electrical operation module is selected to be located outside the miniature circuit breaker, or connected to the miniature Circuit breakers are combined, and each miniature circuit breaker needs to be equipped with corresponding electrical operation modules one-to-one, which is uneconomical in terms of equipment power consumption and production cost. [0004] At the same time, the size of most miniature circuit breakers with electric operation modules ...

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Problems solved by technology

[0003] In the prior art, since the miniature circuit breaker itself cannot realize the automatic closing function, it must rely on an additional electrical operation module to realize the closing function, regardless of whether the electrical operation module is selected to be located outside the miniature circuit breaker, or connected to the miniature Circuit breakers are combined, and each miniature circuit breaker needs to be equipped with corresponding electrical operation modules one-to-one, which is uneconomical in terms of equipment power consumption and production cost

[0004] At the same time, the size of most miniature circuit breakers with electric operation modules on the market is larger than 18mm, which will take up extra space, even if some miniature circuit breakers with electric operation modules can control the width of the entire product within 18mm , the rated current of its protection cannot meet the application of larger current, such as 63A, and its own breaking capacity is also limited, and there will also be a large increase in power consumption and cost

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