Kegconnection Complete Starter Kit and More Giveaway!


Home Brew Forums > Home Brewing Beer > Electric Brewing > Alright Im confused

Reply
 
LinkBack Thread Tools
Old 11-28-2010, 01:22 PM   #1
redman67
HBT_SUPPORTER.png
Feedback Score: 11 reviews
 
redman67's Avatar
Recipes 
 
Join Date: Feb 2010
Location: Taunton, MA
Posts: 396
Liked 15 Times on 12 Posts
Likes Given: 7

Default Alright Im confused

Im no electronics expert

The builds I see all seem to have contactors in them and the way I have mine figured I dont see a need for them

Can someone enlighten me on their application.

Thanks

__________________
redman67 is offline
 
Reply With Quote Quick reply to this message
Old 11-28-2010, 01:34 PM   #2
passedpawn
Moderator
HBT_MODERATOR.png
Feedback Score: 0 reviews
 
passedpawn's Avatar
Recipes 
 
Join Date: Apr 2009
Location: ☼ Clearwater, FL ☼
Posts: 18,285
Liked 3070 Times on 1930 Posts
Likes Given: 2605

Default

I didn't use contactors in mine. They are just relays. A suitable switch can replace them.

You might consider drawing your circuit and posting it. You will probably get lots of feedback.

__________________
I'd love to change the world
But I dont know what to do
So Ill leave it up to you
passedpawn is offline
 
Reply With Quote Quick reply to this message
Old 11-28-2010, 01:48 PM   #3
redman67
HBT_SUPPORTER.png
Feedback Score: 11 reviews
 
redman67's Avatar
Recipes 
 
Join Date: Feb 2010
Location: Taunton, MA
Posts: 396
Liked 15 Times on 12 Posts
Likes Given: 7

Default

Thanks

If I knew how to draw it I would post it but Im computer challenged

What I have planned is the hot legs hitting a termination block, then to fuses, then to 20 amp switches, one leg to the ssr one to the kettles

__________________
redman67 is offline
 
Reply With Quote Quick reply to this message
Old 11-28-2010, 04:15 PM   #4
JohnTheBrewist
Feedback Score: 0 reviews
Recipes 
 
Join Date: Nov 2010
Location: SoCal
Posts: 620
Liked 8 Times on 7 Posts
Likes Given: 6

Default

You could draw it by hand and have someone scan it for you...

But at a minimum, I'm sure the experts will want to know more about what you have planned before offering much advice.

Some basic questions will be:

How will you power the system and element(s) on and off?
How many elements will you use, and at what wattage?
If using more than one element, how will you switch between elements?
Are you using PIDs?

I'm not an expert either, but here's my understanding: Most are using contactors (relays) to carry the load for switching, so that a high amp switch is not required. The extra switching is really a safety factor (i.e to switch the element or entire panel off, so that it is really off). If using a 240v element, turning off one leg, only stops the heating function - but there is still power going to the element.

Hope this helps,

Moose

__________________
JohnTheBrewist is offline
 
Reply With Quote Quick reply to this message
Old 11-28-2010, 06:01 PM   #5
Quaffer
Feedback Score: 0 reviews
Recipes 
 
Join Date: Dec 2008
Location: Snohomish, WA
Posts: 488
Liked 24 Times on 15 Posts
Likes Given: 1

Default

Quote:
Originally Posted by redman67 View Post
What I have planned is the hot legs hitting a termination block, then to fuses, then to 20 amp switches, one leg to the ssr one to the kettles
That sounds about right. A system does not need contactors, a DPST switch (dual on/off) is just fine. A real low-end system does not even need a switch if you are close enough to yank the plug. I for one have a lot of fun expanding the system from there though.
__________________

Alcohol, the source of - and solution to - all of life’s problems. H.J.S.
My keezer, My E-brewery build thread, How I soldered 1" nut for heater

Quaffer is offline
 
Reply With Quote Quick reply to this message
Old 11-28-2010, 10:37 PM   #6
dobeluvr
Feedback Score: 0 reviews
Recipes 
 
Join Date: Aug 2009
Location: nw indiana
Posts: 134
Default

I used a 2 pole contactor for mine. This allowed me to put a mushroom head emergency stop button on the door. If there was a problem, even the wife knows to just hit the red large button to shut everything off. Necessary nah, but utility power here sometimes blinks off 3 or 4 times in a minute, the contactor would drop out needing reset, hopefully preventing some transient power from damaging the electronics.

__________________
dobeluvr is offline
 
Reply With Quote Quick reply to this message
Reply


Quick Reply
Message:
Options
Thread Tools