The overcurrent protection of DC circuit diagram

Published:2011/8/4 20:45:00 Author:Rebekka | Keyword: DC circuit, overcurrent protection | From:SeekIC

Electronic protection circuit is shown in the figure. When the micro switch K is connected to the power supply, the one-way thyristor SCR and the DC circuit will be turned on. When the power consumption excees the the allowable value, the voltage of the sense resistor R1 is greater than 0.7V, the transistor BG is turned on,the voltagebetween collector C and base b of the transistor drops belowthe sustaining voltage of 3CT. 3CT will be turned off and the power supply circuit will be cut off. Electronic protection circuit has a high-speed drying, easy recovery characteristics. It can be applied to any DC circuit for overcurrent protection equipment.



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