Home Brew Forums > Home Brewing Beer > DIY Projects > Brew Stands > 240v Switch Options
Reply
 
Thread Tools
Old 03-05-2010, 09:27 PM   #1
illin8
Feedback Score: 0 reviews
Recipes 
 
Join Date: Apr 2008
Location: South County, RI
Posts: 454
Liked 1 Times on 1 Posts
Likes Given: 1

Default 240v Switch Options

In planning out my control panel I initially decided I'd just do a DPST 30-amp switch to control both legs of power going to the SSR/heating element. In looking at the switches at automationdirect.com is there a better alternative? I really only need an ON/OFF switch to control power to the element.

Anyone care to share their experience and/or give me some advice? Are the automationdirect switches rated for 240v? What would I need? I'm inclined to just buy the damn $11 30-amp DPST switch from Home Depot and be done with it but I'm putting in an order with automation direct anyway...figured I'd ask before I put the order in.


__________________
South County Brewing Co.
Primaries 1 & 2: Apfelwein
Primary 3: EdWort's Haus Pale Ale
Bottle Conditioning: AHS Oktoberfest, Biermuncher's Centennial Blonde

On deck: Nothing (recently moved/working on the laundry list)

Quote:
Originally Posted by Laughing_Gnome_Invisible View Post
Love is not a pink heart on a Hallmark card. It is a curse on mankind in which the male of the species must continually struggle to gain his own happiness by means of satiating the batcrap crazy stupid whims of the lady with the snaky hair.
illin8 is offline
 
Reply With Quote
Old 03-05-2010, 10:12 PM   #2
Jmurm
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jan 2010
Location: Nebraska
Posts: 88
Default

Ive got the same question on this one. I was thinking of not breaking the leg on the 240V but instead breaking the leg on the low voltage coming into the ssr. That way i dont melt the switch together throwing that much power around, and low voltage switches are cheaper. Just got some of my parts for the rims, and about to start the build. It will be nice to get some info from people who have made one.


Jmurm is offline
 
Reply With Quote
Old 03-05-2010, 10:25 PM   #3
Cliff897
Feedback Score: 0 reviews
Recipes 
 
Join Date: Dec 2009
Location: NJ
Posts: 468
Liked 6 Times on 5 Posts

Default

I think you better off using a relay to control the high voltage and letting the high voltage run through that, with low voltage at the switch.
Cliff897 is offline
 
Reply With Quote
Old 03-05-2010, 11:13 PM   #4
Ranger9913
Feedback Score: 0 reviews
Recipes 
 
Join Date: Oct 2009
Location: Nashville
Posts: 299
Liked 5 Times on 5 Posts

Default

This is what I am using. I am wiring power to one leg from the SSR and that will be my "auto" ON and the other ON will receive power right from the source and allow me to control my element manually
Ranger9913 is offline
 
Reply With Quote
Old 03-05-2010, 11:27 PM   #5
Fletch
Feedback Score: 0 reviews
Recipes 
 
Join Date: Mar 2008
Location: So Cal
Posts: 125
Liked 2 Times on 2 Posts

Default

In general, it's best to have some method to positively disconnect both legs from the load. This is even more important when using an SSR, which can be susceptible to false turn-on, and can also fail in the closed mode.
Fletch is offline
 
Reply With Quote
Old 03-05-2010, 11:28 PM   #6
Jmurm
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jan 2010
Location: Nebraska
Posts: 88
Default

Your method looks good, dose it work good manually switching that much power I will be switching 2 4500W heaters. I would normally be on auto, but want the capability to turn them off if i need to turn off a pump or something.
Jmurm is offline
 
Reply With Quote
Old 03-05-2010, 11:46 PM   #7
illin8
Feedback Score: 0 reviews
Recipes 
 
Join Date: Apr 2008
Location: South County, RI
Posts: 454
Liked 1 Times on 1 Posts
Likes Given: 1

Default

The DPST 30-amp switch I was planning on would cut both legs before the SSR. I was just wondering if something like would work (but I only see 120V, not 240v).
__________________
South County Brewing Co.
Primaries 1 & 2: Apfelwein
Primary 3: EdWort's Haus Pale Ale
Bottle Conditioning: AHS Oktoberfest, Biermuncher's Centennial Blonde

On deck: Nothing (recently moved/working on the laundry list)

Quote:
Originally Posted by Laughing_Gnome_Invisible View Post
Love is not a pink heart on a Hallmark card. It is a curse on mankind in which the male of the species must continually struggle to gain his own happiness by means of satiating the batcrap crazy stupid whims of the lady with the snaky hair.
illin8 is offline
 
Reply With Quote
Old 03-06-2010, 12:07 AM   #8
Photopilot
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jul 2007
Location: Oceanside, CA
Posts: 884
Liked 54 Times on 41 Posts
Likes Given: 42

Default

This switch is to be used in conjunction with contactor switches. Auberin has them.

When i step up to a dual element I intend to use this same switch with two contactors. The switch would be all off, BK element on, HLT element on. This switch only needs low power to run it. When the power is chosen the contactor closes the link on the line letting the power go through to the SSR and heating element. I am not sure why but I have heard a few suggest avoiding 240V going through a switch that is external. SSR and contactors allow a remote access to switching.

I had to do some research on contactors. They are pretty similar to SSRs but different in the following ways:
  • They are mechanical as opposed to solid state. Meaning they can wear out with lots of use like you would use an SSR. With these they should only be turned on once or twice a brew session.
  • They will fail open so not leave the power on.
  • They are cheaper and you can get 2 pole contactors for way less than DP contactors.

Here is Auberin's contactors.
http://www.auberins.com/index.php?ma...roducts_id=164

BTW, I am using the HD 2 pole switch for my element now just on the output, downstream from the SSR. I had it in hand before I learned of this setup. I want to keep it simple for now but am running about 2 brew sessions per setup before I change things. Hopefully I can do my first 12 Gallon AG this weekend.

Does anyone know If I can do a 4 way switch off, BK-on, HLT-on, Both on?

Reason: More Detail
Photopilot is offline
 
Reply With Quote
Old 03-06-2010, 12:08 AM   #9
the_Roqk
Feedback Score: 0 reviews
 
the_Roqk's Avatar
Recipes 
 
Join Date: Feb 2007
Location: Central Florida
Posts: 975
Liked 1 Times on 1 Posts

Default

It just so happens that I've been scouring this place for nearly two hours looking at control panel builds and trying to figure out what selector switches to use to control power for the PID's on my electric brew build. I've looked on ebay and have found these.

http://stores.ebay.com/chaudiolab-Mu...&submit=Search

My big question is.... do I need a 12-24 volt transformer to run these? Hopefully this is not off topic and I'm not trying to hi-jack your thread. Like you, I need some advice on what to use.
the_Roqk is offline
 
Reply With Quote
Old 03-06-2010, 12:10 AM   #10
Fletch
Feedback Score: 0 reviews
Recipes 
 
Join Date: Mar 2008
Location: So Cal
Posts: 125
Liked 2 Times on 2 Posts

Default

Quote:
Originally Posted by illin8 View Post
The DPST 30-amp switch I was planning on would cut both legs before the SSR. I was just wondering if something like would work (but I only see 120V, not 240v).
Without sounding obvious, that's a control switch. It would typically be used to complete a circuit to the coil in a relay, contactor or motor starter. They are usually rated for pilot duty and low current direct switching, usually 3 amps max. 22mm and 30 mm panel switches like these look great, and can certainly be used to switch your typical homebrew rig circ pump, but in order to use them for heater elements you'll need a definite purpose contactor, which can be had pretty cheap.



Reason: clarity
Fletch is offline
 
Reply With Quote
Reply


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
240V extension cord? yellow Other 18 11-22-2013 10:20 PM
Ranco wiring 240V beer_master Brew Stands 4 07-04-2011 12:27 PM
3 Pos 240v Switch illin8 Brew Stands 8 05-20-2009 02:07 AM
New House & 240V illin8 Equipment/Sanitation 16 05-07-2009 02:39 PM


Forum Jump

Newest Threads

LATEST SPONSOR DEALS