Tech Forum

January 2012

Self-Powered Current Switch

I would like to know how to build a self-powered currect switch to monitor a lamp pole light. I need it to output an open or closed contact, so I can sense if there is current or not.

The light pole voltage is 120V at a range of 1A-10A. Anything above 200-500 ma current is on or closed contact. Otherwise, no current, open contact. I need it as small as possible and over-voltage and over-current protected.

Any help out there?

#1124
Christopher LeFrois
Lincoln, NE