biertourist
Well-Known Member
I've looked at a number of simple electrical designs for simple 240v electric systems and most that I've seen only implement a single SSR even for a 240v element and essentially keep one leg "hot" during operation. -Yes most of these have a switch that cuts power to both legs but when you turn down the leg connected to the SSR using either a dial or a PID controller -doesn't this mean that "0%" output on your controller / dial is actually 25% power output during operation? (If you're cutting the voltage to the element from 240v to 120v thats 1/4 the wattage output, right?)
I also saw an example system on the Brewtroller site and their solution used 2 SSRs for a single element - one for each element with the low voltage control signal from the PID being connected to both SSRs simultaneously.
What are the pros and cons of going with 2 SSRs for a single 240v element vs. just one SSR?
-Obviously cost and the likelihood of losing power to an element due to an SSR failure is doubled with 2 SSRs, but what else? (Double the heat output for the 2 SSR solution, too so there's plenty of "CONS" for the 2 SSR solution; what are some of the PROs?)
Adam
I also saw an example system on the Brewtroller site and their solution used 2 SSRs for a single element - one for each element with the low voltage control signal from the PID being connected to both SSRs simultaneously.
What are the pros and cons of going with 2 SSRs for a single 240v element vs. just one SSR?
-Obviously cost and the likelihood of losing power to an element due to an SSR failure is doubled with 2 SSRs, but what else? (Double the heat output for the 2 SSR solution, too so there's plenty of "CONS" for the 2 SSR solution; what are some of the PROs?)
Adam