Kind of related to this current thread:
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This came as a shock to me. A few years back, I used zero cross SSRs to control my pool pump via a timer. According to this document, I should have used a random SSR instead of zero-cross---- I'm not totally convinced yet this article is right.
ie. I believe it makes sense that the current will be high on an inductive load at switching transient---but, it seems as though they are more interested in saving the life of the SSR--as opposed to the inductive load (a 1-2hp motor in my case). My pool guy said, "don't put a timer on it--let it run 24/7--otherwise I'll be out in a year or so replacing your dead pump motor". But, I thought 'hey, if I switch at zero, it can't hurt the motor'. So far I've had no problems with the setup at all.
Did I do the right thing? with respect to the motor? I'd rather replace a $30 SSR than a $350 pump.
Thoughts?
Paul