Low-power-consumption under-voltage release based on relay driving

Abstract

The invention belongs to the technical field of low-voltage electrical equipment, and particularly provides a low-power-consumption undervoltage release based on relay driving, which comprises a surge absorption loop, a rectification loop, a DC / DC loop, a voltage detection and release driving loop, a starting time control loop, a starting current control loop, a release control loop and a release coil, the rectification loop is respectively connected with the surge absorption loop, the DC / DC loop and the starting current control loop, the DC / DC loop is also respectively connected with the voltage detection and tripping driving loop and the starting time control loop, and the voltage detection and tripping driving loop is also connected with the tripping control loop. The tripping control loop, the starting time control loop and the starting current control loop are connected in sequence, and the tripping control loop and the starting current control loop are both connected with the tripping coil. The low-power-consumption under-voltage release based on relay driving has the advantages of being low in power consumption, long in service life, stable in action voltage and the like.

Description

technical field [0001] The invention relates to the technical field of low-voltage electrical equipment, and more particularly, to a low-power undervoltage release based on relay driving. Background technique [0002] The traditional circuit breaker undervoltage release is a typical electromagnet structure. The iron core of the electromagnet is pushed out by a spring, and the electromagnetic force generated by the coil is opposite to the spring force. When the voltage is greater than 70% of the rated voltage, the electromagnetic force is greater than the spring force, the iron core is sucked into the electromagnet, and the circuit breaker can be closed normally. When the voltage is less than 35% of the rated voltage, the electromagnetic force is less than the spring force, and the iron core is pushed out to push the drawbar to trip the circuit breaker, thereby achieving the protection function of undervoltage tripping. [0003] The undervoltage release based on the above te...

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Problems solved by technology

[0008] The purpose of the present invention is to provide a low-power undervoltage release based on relay drive to solve the problems of large power consumption, large heat generation and instability in the existing undervoltage release in the background technology. In some high temperature or vibration occasions, it cannot meet the user's requirements

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