> On Nov 8, 2016, at 8:47 AM, Jon Elson <el...@pico-systems.com> wrote: > > On 11/07/2016 10:31 PM, Jon Elson wrote: >> On 11/07/2016 07:59 PM, Mark Linimon wrote: >>> On Mon, Nov 07, 2016 at 11:23:58AM -0800, Chuck Guzis wrote: >>>> But if you're a suburban resident living on Mulberry Street, anything >>>> but single-phase is pretty much out of the question. >>> Oh, you can get it -- but be prepared for a large hassle. >>> >>> A former neighbor had a 440V 3-phase Italian lathe in his backyard shop, >>> among other toys. After he was laid off from his aerospace job doing >>> machining it was how he made his living. He was a very handy person >>> to know :-) >>> >>> mcl >>> >> I have two 3-phase machines in my shop (Bridgeport mill and Sheldon lathe) >> and run them each off a properly-sized VFD. 2-phase in, 3-phase out, plus >> variable speed and dynamic braking. >> >> Jon >> > And, of course, that is really SINGLE-PHASE power on 2 wires, just to save > anybody the trouble of correcting my error. >
I’m looking to have to do something to get 3-phase for the IBM 4331 gear. I haven’t quite added up the power requirements yet but I’m guessing its going to be in the 10-15kVA range. Since the power to all of the gear is really split between 3 loads (string of 4 3340 drives, 3803 control unit + 2 3420 tape drives and 2821 control uint + 1403 printer + 2540 card reader/punch) I need to figure out if it’s best to have one big converter or 3 smaller ones. It’s unlikely that I’d be running all of the peripherals at once. The 4331 itself runs off of single phase 220v. TTFN - Guy
