schwartzr33
Well-Known Member
I am starting to think about an eBiab build, based on a drawing by P-J (man, that guy is amazing). The drawing is https://www.homebrewtalk.com/f170/240v-5500w-ebiab-planning-please-help-401409/index2.html.
I plan to make a couple of changes, I will have a dedicated 240v GFI circuit, instead of a spa panel, and I plan to use the Auber SWA-24X1 pid, for the timer feature.
A couple of questions:
1) I assume I should go with the 2451, to control an SSR?
2) I would like to understand how the contactor and SSR work together. I've done a fair amount of reading on HBT and I understand that SSRs can fail "on" and you also want piece of mind that your element is truly turned off--both good reasons to use the contactor and a switch. However, what I don't understand is how the contactor interacts with the SSR. As I understand it, contactors cannot switch on an off as quickly as an SSR. In the drawing, it looks like Line 2 goes from the SSR to the contactor. Won't that make the contactor switch on and off as fast as the SSR switches on and off? Again, I've tried reading up on this and a couple of posts came close to answering my question, but I still don't get it. Perhaps it goes without saying, but I have pretty much zero electrical experience and I really want to understand what and why I'm doing something.
Thank you for your help!
I plan to make a couple of changes, I will have a dedicated 240v GFI circuit, instead of a spa panel, and I plan to use the Auber SWA-24X1 pid, for the timer feature.
A couple of questions:
1) I assume I should go with the 2451, to control an SSR?
2) I would like to understand how the contactor and SSR work together. I've done a fair amount of reading on HBT and I understand that SSRs can fail "on" and you also want piece of mind that your element is truly turned off--both good reasons to use the contactor and a switch. However, what I don't understand is how the contactor interacts with the SSR. As I understand it, contactors cannot switch on an off as quickly as an SSR. In the drawing, it looks like Line 2 goes from the SSR to the contactor. Won't that make the contactor switch on and off as fast as the SSR switches on and off? Again, I've tried reading up on this and a couple of posts came close to answering my question, but I still don't get it. Perhaps it goes without saying, but I have pretty much zero electrical experience and I really want to understand what and why I'm doing something.
Thank you for your help!