Electric Brewing Supply 30A BCS Giveaway - Last Weekend to Enter!


Home Brew Forums > Home Brewing Beer > Electric Brewing > E-Stop
Reply
 
LinkBack Thread Tools
Old 10-25-2011, 05:31 PM   #1
Bsquared
HBT_LIFETIMESUPPORTER.png
Feedback Score: 0 reviews
 
Bsquared's Avatar
Recipes 
 
Join Date: Oct 2006
Location: San Diego
Posts: 1,812
Liked 55 Times on 51 Posts
Likes Given: 22

Default E-Stop

So the last part of my Electric set up I need is the E-Stop. I ordered the big red mushroom, and have an in-line fuse holder for the 1amp fuse, but I am a little stumped on the two 1Ω resistors. The resistors I am picturing are the ones that get soldered in to a board. are these the ones people use? How are these incorporated with a wire? are they just soldered in-line to the wire? or is there a better way.

Thanks in advance for the help.

__________________
Bsquared is offline
 
Reply With Quote Quick reply to this message
Old 10-25-2011, 06:01 PM   #2
samc
Feedback Score: 1 reviews
Recipes 
 
Join Date: Aug 2008
Location: Portland OR
Posts: 5,420
Liked 54 Times on 51 Posts
Likes Given: 29

Default

Are you talking about the P-J device? If so I just carefully, soldered a wire on the metal leads.

__________________
samc is offline
 
Reply With Quote Quick reply to this message
Old 10-25-2011, 06:19 PM   #3
audger
Feedback Score: 0 reviews
Recipes 
 
Join Date: Apr 2011
Location: ., Connecticut
Posts: 1,497
Liked 40 Times on 40 Posts
Likes Given: 1

Default

anything that gives you a little resistance will work. for only 1ohm, you can probably even get away without it- though i wont tell you to do that without seeing the whole wiring diagram. i believe all its for is to trickle a little current to the ground wire to trip the GFCI. a standard 1/8th watt resistor with some 28 or 26ga wire will work for that.

do you have a specific wiring diagram to confirm?

__________________
audger is offline
 
Reply With Quote Quick reply to this message
Old 10-25-2011, 06:58 PM   #4
Bsquared
HBT_LIFETIMESUPPORTER.png
Feedback Score: 0 reviews
 
Bsquared's Avatar
Recipes 
 
Join Date: Oct 2006
Location: San Diego
Posts: 1,812
Liked 55 Times on 51 Posts
Likes Given: 22

Default

Yes I'm using PJ wire diagram for the e-stop. This is what I am thinking of...
Is this right?

__________________
Bsquared is offline
 
Reply With Quote Quick reply to this message
Old 10-25-2011, 11:39 PM   #5
orangehero
Feedback Score: 2 reviews
Recipes 
 
Join Date: Apr 2010
Location: Northeast
Posts: 987
Liked 121 Times on 68 Posts
Likes Given: 196

Default

On his diagrams they are 1K ohm 1W.

__________________
orangehero is offline
 
Reply With Quote Quick reply to this message
Old 10-26-2011, 02:51 AM   #6
kellzey
Feedback Score: 0 reviews
Recipes 
 
Join Date: Aug 2011
Location: orlando, FL
Posts: 310
Liked 14 Times on 12 Posts
Likes Given: 4

Default

Yes, you need something like this... these are 1 watt resistors



I think the ones in post #4 or 1/8, 1/4, and 1/2 watt

I picked up from my local electronics surplus place...

__________________
Black Pug Brewing - Progress Thread

In the fermenter: Pugkin Ale, Apfelwein
In the keezer: Black Pug Coconut Porter, Black Pug Wheat, Black Pug IPA
Gone: Black Pug Blonde Ale
kellzey is offline
 
Reply With Quote Quick reply to this message
Old 10-26-2011, 02:55 AM   #7
Bsquared
HBT_LIFETIMESUPPORTER.png
Feedback Score: 0 reviews
 
Bsquared's Avatar
Recipes 
 
Join Date: Oct 2006
Location: San Diego
Posts: 1,812
Liked 55 Times on 51 Posts
Likes Given: 22

Default

Sweet,Thanks. I did not see the 1K 1W this morning. I have a good electronic component shop I go to down the street. I'm sure they will have them.

__________________
Bsquared is offline
 
Reply With Quote Quick reply to this message
Old 10-26-2011, 03:08 AM   #8
kellzey
Feedback Score: 0 reviews
Recipes 
 
Join Date: Aug 2011
Location: orlando, FL
Posts: 310
Liked 14 Times on 12 Posts
Likes Given: 4

Default

If you get stuck, i can get some more and send some to you.

__________________
Black Pug Brewing - Progress Thread

In the fermenter: Pugkin Ale, Apfelwein
In the keezer: Black Pug Coconut Porter, Black Pug Wheat, Black Pug IPA
Gone: Black Pug Blonde Ale
kellzey is offline
 
Reply With Quote Quick reply to this message
Old 10-26-2011, 03:16 AM   #9
lschiavo
Drinks Beer
HBT_SUPPORTER.png
Feedback Score: 0 reviews
 
lschiavo's Avatar
Recipes 
 
Join Date: Sep 2009
Location: Surrounded by Yoopers
Posts: 3,972
Liked 780 Times on 520 Posts
Likes Given: 539

Default

Using two 1k resistors results in 7 Watts dissipated and 60mA of fault current. I assume the wattage of the resistors doesn't matter much as the Gfi should trip before the resistors have much chance to heat.

I think the fault current could be reduced by raising the resistance and maybe splitting the load into three resistors. Then the wattage rating of the resistors would not be exceeded. Is this worth doing? Wouldn't 15 or 20mA be sufficient to trip the gfi? I think this is a brilliant way to provide an e stop but I never really understood the excessive current or undersized resistors.

__________________
lschiavo is offline
 
Reply With Quote Quick reply to this message
Old 10-26-2011, 03:48 AM   #10
P-J
HBT_LIFETIMESUPPORTER.png
Feedback Score: 0 reviews
Recipes 
 
Join Date: Mar 2010
Location: Charlotte, NC
Posts: 3,278
Liked 258 Times on 206 Posts
Likes Given: 452

Default

Please keep in mind that once the E-Stop is pressed the GFCI will cut all of the power to the control panel within a millisecond. There is no need to have higher wattage resistors or resistors that limit the current draw to a lower level. We are talking about 0.06A for less time that it would take for you to blink your eye. Will the resistors heat up? NOT a chance.!

__________________
P-J is offline
 
Reply With Quote Quick reply to this message
Reply



Quick Reply
Message:
Options
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
System Power/E-Stop Jandro Electric Brewing 9 02-10-2011 06:40 PM
Power/E-stop Wiring for 2 inputs (120V & 220V) thelorax121 Electric Brewing 15 02-03-2011 01:58 AM
Looking for One Stop shop for RIMs electrical Rims Components kegtoe Electric Brewing 4 12-26-2010 02:10 AM