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
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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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