[Amps] Solid State Relays Again

[Robert Groh]

I share your question - about the random turn on (ROT) VS zero crossing (ZC).  It would seem to me that the zero crossing is the more benign condition as you would have (for any type of load) minimum voltage and, hence, minimum current at turn on.  For a ROT device, you could have the device turning on at maximum voltage which for resistive or capacitive loads would be maximum current.  And I think, on reading the vendor's literature (but not very thoroughly) they concur.


But this sure wouldn't be the first time my brain got scrambled!

73
Bob Groh, WA2CKY



________________________________
 From: "TexasRF at aol.com" <TexasRF at aol.com>
To: donroden at hiwaay.net; amps at contesting.com 
Sent: Monday, February 10, 2014 11:50 AM
Subject: Re: [Amps] Solid State Relays Again
 
... snip....
Can someone please explain why turning on/off at a zero crossing is a  
problem? Seems that could still happen at times even with the random  on/off.

73,
Gerald K5GW