Posted by Red Dave on June 22, 2009 at 16:50:06 from (98.235.15.235):
I got to thinking about the post below concerning volatge regulators suffering early failure. Specifically, contact failure due to higher than designed field current.
I've done contact protection on equipment years ago using resistor/capacitor networks or varistors. 12 volt varistors are available and will suppress the arc drawn by contact opening prolonging the life of the contacts. The proper resistor & capacitor in series will do the same thing. Somewhere in my pile of "stuff" I have a nomagraph that, given the voltage and amperage of the circuit, will specify the proper values to use. We've used it at work with a lot of success over the years.
Do you know any reason that approach wouldn't work on a voltage regulator? It would have to be wired directly across the contacts. I'll root around and see if I can find that nomagraph.
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