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Home Brew Forums > Home Brewing Beer > Electric Brewing > ebay 3800w dimmer
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Old 07-24-2012, 08:46 PM   #1
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Default ebay 3800w dimmer

I wonder if one of these would work for an element controller I hope the link works

http://www.ebay.com/itm/New-3800W-0-...#ht_2525wt_942

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Old 07-24-2012, 09:28 PM   #2
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Yeppers it's a simple PWM

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Old 07-25-2012, 08:04 AM   #3
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Not PWM but phase angle. Same as any simple light dimmer for halogen or glowlamp, but with more power.

In theory you could experience some RF-noise with phase angle, but I wouldnt worry to much about it.

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Old 07-25-2012, 01:05 PM   #4
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Will there be any issues running a 5500w element on a 3800w dimmer?

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Old 07-25-2012, 04:29 PM   #5
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99.999999% chance there will be problems, of the smoky/sparky/fiery kind. The dimmer can source up to 3800 watts and the 5500 watts element wants to drain an additional 1700 watts above that.

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Old 07-25-2012, 05:20 PM   #7
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It should work with 120v and a 2000w element.

EDIT: looking at the pictured item again, it has only 2 screw connectors, one for the input, the other for the output, so it looks like this has to be connected in series with the load on the neutral wire. It's the only way I see this working with a 220v setup, which normally has 2 hots and 1 neutral and I don't like that. In a 110v set up, you can connect it between the on/off switch and the load in the hot wire.

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Old 07-25-2012, 05:37 PM   #8
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Is it a good idea to get a dimmer that can handle more than the element is rated for, or is it OK to match them up equally?

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Old 07-25-2012, 05:44 PM   #9
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Quote:
Originally Posted by lunchbox View Post
Is it a good idea to get a dimmer that can handle more than the element is rated for, or is it OK to match them up equally?
Yes, it is a good idea to get one that can source more (current, and therefore higher wattage) than the load drains. But be aware that you should always match the voltage.

After taking a look at the listing and what it is, it's OK even though it is meant to work with 220v. But that is NOT always the case with these things.
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Old 07-25-2012, 08:04 PM   #10
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Quote:
Originally Posted by mendesm View Post
99.999999% chance there will be problems, of the smoky/sparky/fiery kind. The dimmer can source up to 3800 watts and the 5500 watts element wants to drain an additional 1700 watts above that.
While I agree it is not good practice to run things beyond their rated potential, why do you percieve nearly 100% chance of failure? These things must be slightly overdesigned, no?

How about 4500w?

Sorry for the noobish question, is something like this ready to use, or are more components needed to control an element...
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