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Electrical outlet is 30 volts LOW or HIGH sometimes?

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gary350

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The preacher (Kelly) from church is in a 3rd world country. They have electricity for a few hours 2 times every day. When the electricity comes on it is always LOW or HIGH for about 5 minutes before it becomes stable at 120 VAC.

Kelly knows about electrical and mechanical stuff we worked together for 6 years before he became a preacher. Kelly has rigged up a transformer with multiple taps so if the voltage is 30 volts too high or 40 volts too low he can flip a selector switch to get 120 VAC while they wait for the voltage to stabilize.

Kelly wants to know if there is a way to use a time relay to keep everything off for 5 minutes while the voltage stabilizes. I told Kelly to use a 5 minute Potter and Brumfield time relay to turn on a 100 amp motor starter.

Kelly can order the things he needs on Ebay and have them mailed to him.

One thing I don't know is, what will the timer relay do if it is trying to start on 70 volts or 150 volts AC?

I am open for suggestions???
 
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If you know what TDR you want him to buy, read its spec sheet. You'll find the max and min operating voltage in there.
If you can't find a suitable TDR, make a crude DC supply (zener?) and feed it into a DC TDR. A zener supply should have enough lattitude to handle big swings.
 
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