Circuit Project Electronic

Brief (1 sec or shorter) power outages are common in developing countries and seem to be increasing in the United States. They are generally nondestructive, so power-protection equipment should not trip and disconnect the load. Electric motors do not appreciably slow, and electronic equipment can usually ride through the outages on the energy stored in filter capacitors. As a point of reference, a 10-msec outage makes an incandescent light bulb flicker.

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http://www.edn.com/archives/1997/030397/05DI_06.htm