Mains under voltage voltage protection circuit


Posted on Mar 28, 2007

It can be used in refrigerators and other protection. It uses a 7815 three-terminal voltage regulator integrated fixed and Ai 555 IC Az (one-shot circuit for delay control). When the electricity is lower than 180V, the relay KA release, cut off the power


Mains under voltage voltage protection circuit
Click here to download the full size of the above Circuit.

to the load while light emitting diodes VL. When the city electricity when power outage is restored, the protection circuit to be (set by the potentiometer RP) after 3-5min to make KA pull.




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