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Help with a switching issue

DaveClark

Mar 9, 2012
2
Joined
Mar 9, 2012
Messages
2
Hi all,

I wonder could you help with an question I have?

I have an extractor fan, plugged into a 13A socket.

The 13A socket is controlled via a digital thermostat. (similar to this one)

When the temp gets to high, the fan runs.

When the temp drops below a given point, the motor stops. All this works great.

However, I would like to change the operation so that when the thermostat circuit cuts power to the fan, instead of stopping, the fan idles.

In order to make the fan idle, I have a variac available.

Any ideas on how this could be connected? Would I need some kind of relay controlled switching circuit?

Thank you for any advice you can offer.

Dave
 

mechtronics

Aug 7, 2011
153
Joined
Aug 7, 2011
Messages
153
is the process working off all AC ?? or have u a electronic DC circuit controlling the thermostat which turns on a DC/AC relay to operate the fan??
 

DaveClark

Mar 9, 2012
2
Joined
Mar 9, 2012
Messages
2
There is probably a transformer in the thermostat device but otherwise everything currently runs on 240v AC
 

mechtronics

Aug 7, 2011
153
Joined
Aug 7, 2011
Messages
153
i was thinking could maybe u could incorporate a relay so that when the fan stops the relay would activate and could be connected to a dimmer switch varying the current and speed of the fan for idling??
 
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