Kirk Wallace wrote: > > It might be hard to find a VFD rated higher than a few HP that can run > on 240VAC input. > http://www.automationdirect.com/adc/Overview/Catalog/Drives/GS2_%28115_-z-_230_-z-_460_-z-_575_VAC_V-z-Hz_Control%29 > > Short URL: http://alturl.com/qhdpo > > I am running an 11 KW Toshiba VFD on 240 single-phase, and it is perfectly happy. A few models have phase loss detection, and will fault if they don't have all three phases. Most under 10 Hp don't seem to have that problem. You do need to derate the drive for single phase, if it is not designed for it. But, remember, these drives are designed to run inside cabinets at 40 C, 20/7 for 10 years or so. That is not typical home shop duty, so the drive gets a big break by not running all the time at full load. > The higher HP drives seem to need 460VAC. I bought a VFD from eBay and No, there are drives up to 100 HP for 240 V supply. These will cost a FORTUNE, even on eBay. The 480 V drives have transistors rated for half the current and twice the voltage, and they are a lot cheaper. Most industrial sites with 100 Hp motors have 480 power. The current draw of a 100 Hp motor on 240 V is about 330 A per line! Yikes, the transistors must be the size of a brick!
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