brainstorming session

[Pegleg Smith]

I had a restuarant owner ask me what can be done to protect his equipment when the rolling blackouts come along.
The problem is when the power comes back on I am quite sure there will be a brown out condition as all the appliances, air conditioning, refrigeration and such start at one time in the 10,000 or so homes and businesses that will be affected by the blackout.
Here is the problem. How can I put a 'time delay on make' on a system that uses line voltage to run through the controls? This is 208 volts. If I interupt the voltage running through any of the controls, will the time delay keep the equipment off for an additional 5 minutes when the equipment cycles on normally? Any body have an idea as to how I can overcome this? I'm not sure if using a delay on break timer would be better.
Is there a better safety I can use?

[Breeze]

Others to I am sure. I have always used for low volts but many have a wire you can cut to run high volts through it, the load cant be that much on those.

Is this a/c, ref, walkins, etc... Then I can see why you want something that will break the high volts.

Maybe you could add a low volt control circuit with contactor/relay and then timer on those that dont use low volts.

[maverick]

I would agree with Breeze that someone would make that kind of a device. What about running the present line controls to a contactor with a 208v. coil so that when energized would power another time delay relay?

[Pegleg Smith]

I guess you didn't understand the question or the senario.
I don't want to re-invent the wheel. I just want to be able to keep the equiment safe from a blackout/brownout condition. Now I could put in 24 volt controls and have a real expensive solution to the problem but I want to continue using line voltage and only add some sort of protection. This protection is available from ICM. One of my suppliers carrys it. It breaks both legs of the 208V. It has an adjustable time delay also. I'll get the number of the control later and post it. There is also another one for 3 phase that works the same way. Not a 3 phase protector but a blackout/brownout protection control.

[JAMES 3528-old]

If I interupt the voltage running through any of the controls, will the time delay keep the equipment off for an additional 5 minutes when the equipment cycles on normally?

Yes, if you do it or the power company if you use a delay on make. And yes there are controls that do what you are wanting to do.;)

[Pegleg Smith]

What part of that didn't you understand? I am writing this real slow cause I know you don't read too fast.

[Breeze]

James is armed and doesn't seem to be running out of ammo anytime soon.

[Pegleg Smith]

He told me his ex old lady tried to have him arrested for assualt with a dead weapon. He can't get it up. This is a real personnal thing he told me so try to keep it quiet, OK. You never know what would happen if someone like Dice found out about it.:cool:

[Breeze]

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