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Mains Timer off delay

screwball

Jan 9, 2012
89
Joined
Jan 9, 2012
Messages
89
Hi,
I've been looking at making a mains powered (230vac) timer off delay.
I can find an ON time delay but not off.

Anyhow, I need the circuit so that when powered is first applied, the load will be powered for 20seconds then turns off and does not come back on unless circuit power is removed then reapplied. Max load would be 230v 1amp.

Any help would be great,

Thanks,
 

shrtrnd

Jan 15, 2010
3,826
Joined
Jan 15, 2010
Messages
3,826
I don't know where you're located at, but there are just as many delay-on, as delay-off TDR's (Time Delay Relay)
Have you checked specifically for the title 'time-day relay' or are you somehow unintentionally limiting your information search parameters?
 

Y2KEDDIE

Sep 23, 2012
259
Joined
Sep 23, 2012
Messages
259
I typically use Agastat brand Electropneumatic timers. When power is applied to the coil the plunger moves to charge a pneumatic cylinder. Timing is adjusted via a variable orfice. The compressed piston of the cylinder, pushes against an opposing spring attached to the movable switch contacts.
 
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