Mains undervoltage overvoltage protection circuit


Posted on Mar 28, 2007

It uses a transistor control circuit. When the grid voltage is normal, relay KA pull, turn the power load. When the grid voltage is below the minimum allowable value (can be set by the potentiometer RPz), or higher than the maximum allowable value (by RPi setting), KA is released, the load can be cut off the power supply.


Mains undervoltage overvoltage protection circuit
Click here to download the full size of the above Circuit.




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