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Home Brew Forums > Home Brewing Beer > Electric Brewing > contactors insted of ssrs
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Old 09-28-2011, 12:19 AM   #1
chady74
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Default contactors insted of ssrs

i was wandering if anyone has used old school contactors insted of ssrs

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Old 09-28-2011, 12:30 AM   #2
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Sure, depending on the application. For simple control where digital voltage is not a player and the current will not be rapidly switched on and off, contactors work great. For easy digital control and/or PWM duty cycle management, SSRs have the advantage.

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Old 09-28-2011, 12:31 AM   #3
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The benefit of SSRs over mechanical means of switching are the prolonged service life provided by SSR. No moving items and no electric arching allows SSRs to be switched rapidly and for more cycles.

Depending on the switching rate an EMR (electromechanical relay) could quickly wear out, especially in our usage for temperature control.

EMRs and contactors have great purpose but rapid, repeated switching just isn't their thing.

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Old 09-28-2011, 12:37 AM   #4
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thanks guys im starting my ele build as a school project i went back after a masive heart attack im taking indust mant and the focus is in plcs and pid con troll

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Old 09-28-2011, 12:43 AM   #5
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Have fun, best of luck!

Oh and of course, show it off as you build!

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Old 09-28-2011, 06:30 PM   #6
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I use both in my electric brewery build. SSR for the boil kettle, which is controlled by PWM, and an old fashioned electromechanical relay for my HLT since it doesn't need to cycle so often. In fact, with a +/- 1 degree F set point, it cycles every few minutes once it hits temp.

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Old 09-28-2011, 08:59 PM   #7
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i will be posting lots of pics once i start im just doing reserch right now probly start on it next mounth

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