I've read a lot of the posts on parts of this question. I am using a Grainger current sensor to a relay to turn on my D/C system when I turn on my machine power on that circuit. It has worked great for a few years now. As I read these forums, I'd like it to stay on for a little while when the power to the machine goes off. Can someone fill in the blanks on how I could do this? I've read some of you have done this - but could not quite tell how. I know a fair amount about electrical wiring - but not on how to accomplish this delay. The sensor has a delay feature to delay the turn on - but that's not what I want. My D/C is on a 220volt 20 amp circuit that the relay controls. I also have a manual override switch to power the relay.