[Amps] Solid State Relays Again

[donroden at hiwaay.net]

Quoting Peter Voelpel <dj7ww at t-online.de>:

> I guess with transformers the relay should switch in on the peak voltage.
> As current peaks 90 degree behind that should be the best moment with least
> surge current.
>
> 73
> Peter



But if you switch at zero voltage, the current is at zero 90 degrees later...

So you have at least 1/4 of a cycle where there is minimum IxE  
supplied to the load.

Don W4DNR