Self-recovery adjustable current protector

Abstract

The invention relates to a self-recovery adjustable current protector. An overload protection circuit comprises a rectification voltage stabilization power supply unit, a micro processing unit, a current sampling unit, an instruction input unit, a display unit and an output driving amplification unit, wherein the output driving amplification unit comprises a main relay; a contact of the main relayis connected in series to the inside of a voltage output loop of the current protector; the instruction input unit is used for inputting a preset overload value to the micro processing unit; the current sampling unit is used for periodically acquiring a load current; and the micro processing unit controls a comparator to compares a real-time load current with the preset overload value, and controls the contact of the main relay in the output driving amplification unit to be opened or closed according to a comparison result, so that voltage output of the current protector is controlled. Therefore, a user can flexibly input the set preset overload value through the instruction input unit according to needs so as to adapt to different requirements and occasions; and the current protector hasa self-recovery function, so that manual operation is not needed.

Description

technical field [0001] The invention relates to a current protector, in particular to a self-restoring adjustable current protector. Background technique [0002] At present, the current protectors in the market usually use the traditional tripping mechanism as the actuator to drive the contact group to complete the breaking. When the detection circuit detects overload or short circuit, the control circuit will send a control signal to control the action of the tripping mechanism. The driving contact group completes breaking. However, the operating current setting value of the existing current protector is fixed, which cannot be set and adjusted according to the actual needs of the user. In this way, the user needs to purchase multiple products with different specifications to meet different use objects, and cannot interact with each other. The range of adaptation is limited; and in order to make their own products suitable for different occasions, manufacturers need to dev...

AI Technical Summary

Problems solved by technology

However, the operating current setting value of the existing current protector is fixed, which cannot be set and adjusted according to the actual needs of the user. In this way, the user needs to purchase multiple products with different specifications to meet different use objects, and cannot interact with each other. The range of adaptation is limited; and in order to make their own products suitable for different occasions, manufacturers need to develop products with different current specifications at the same time, and keep a certain amount of inventory, which increases production investment and increases the burden on enterprises; at the same time, users purchase After that, they cannot be used interchangeably, which also brings inconvenience to users. In order to meet market demand

In addition, the existing current protector does not have the function of automatic recovery when the load is reduced after the current overload is disconnected, and manual operation is required to restore the work, which brings inconvenience to the user. Flawed development of an adaptable current protector

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