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Old 22nd June 2004, 08:33 AM   #1
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Question 240v power regulator HELP!!

I had a terminal power problem about 2 weeks ago most of the Rack was already powered up I turned on th Projector to watch a new DVD and the Thing went Bang (thank God for the waranty) anyway I think the power went nuts I put a meter across the mains and it was up to 283volts so i would lick some sort of regulation.

any help would bet great

ps. my electrial knowalage is average.
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Old 22nd June 2004, 01:18 PM   #2
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not going to happen..... well.. it COULD but its sooo not worth it.. umm.... maybe an overvoltage protection, so if the voltage increases by 10% or whatever, it turns everything off?
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Old 23rd June 2004, 07:57 AM   #3
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Unhappy overvolatge?

Overvoltage? How would u go about something like that?

And how would u go about regulation if it could be done?

Thanks for your time.
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Old 23rd June 2004, 08:32 AM   #4
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It's a bit different but not impossible. What's used is a resonant transformer on the verge of saturation, so that an increase in voltage causes further saturation, resulting in clipping in the iron.. the resonant nature smooths it out and you get a sine wave output. If the voltage falls too much, output will drop with it or if it rises too much it'll ovrheat. I think the typical range is +/-10 or 20% of some nominal voltage.

Otherwise, you could FWB the line () and run a PWM regulated sine wave generator. Basically a large class D power amplifier ran at 60Hz.

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Old 23rd June 2004, 10:19 PM   #5
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How bout a constant voltage transformer to "buck" the excess voltage?

http://www.sola-hevi-duty.com/produc...ioning/cvs.htm
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Old 24th June 2004, 05:17 AM   #6
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Looks interesting but i should hav said we have 50hz here not sure this would be quite right will look in to it from local supplyers here in New Zealand

Again thanks for the input Guys
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