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Old 02-25-18, 10:20 PM   #11
NiHaoMike
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V/Hz scaling is just a bit of code. You'll be a lot more limited in how much you can apply, but going down to 200/100V and 50Hz should work fine. (Just ask the Japanese!) Even then, a 20% power usage reduction for motor loads and 30% for resistive loads is pretty substantial.

You'll do even better if you used 3 phase for the compressors driven with off the shelf VFDs.

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