Re: [CAD_CAM_EDM_DRO] U.S. 220 vs Euro 220

Related to this on a thread I saw recently regarding a company that "Had to
HAVE" equipment that would run identical in both the states and abroad, the
solution was (for 3 phase) to use VFD's! This way, the difference in the
voltage and frequency could be overcome and the equipment would run the
same speeds no matter which country they were in;_})

At 08:26 PM 5/16/01, you wrote:

>In a message dated 16-May-01 12:19:45 Central Daylight Time,
>blueveil@... writes:
>
>
> > Does anyone know if U.S. 220 is the same as European 220?
> > Could I take a 220 single phase cnc machine to Europe and use
> > it without any adapters?
> >
>
>Blue: Yes and no. First everywhere in the world except USA, Canada, and
>maybe Mexico, or at least parts of it are 50 Hz. Maybe Japan, too? Not
>sure.
>
>But Continental Europe (Germany, etc.) is 220 VAC, 50 Hz. Not sure about
>Israel. England, and probably Australia? are 240 VAC, 50 Hz. "AC Induction
>motors" (all the kinds without brushes and sparks) run 5/6 as fast abroad.
>That is, if a motor turns 1800 RPM, no load, here, it will turn only 1500
>RPM, no load, there.
>
>The English "three phase" is usually 416 V. between legs. They do NOT have
>"open delta" like we often do, here. The German three phase isn't called
>that! It's called "Drehstrom" ("turning current"), and is about 385 V.
>between legs. Again, they have NO clue what "open delta" is, abroad, nor in
>Germany.
>
>A single-phase motor you may be using here, wired for operation on 240 VAC,
>single-phase, will work in England, but only at 5/6 speed. (83%). It will
>work "OK" on the Continent, but at slightly reduced torque, as the voltage is
>about 10% less, there.
>
>You gotta "know your motor-specs. and at least SOME electrical-engineering,
>to be sure a U.S. 3-phase motor will "do OK" on the European Continent, when
>"wired up" for that voltage. Because the voltage is wildly-different! Get
>your E.E. text out and read about the differences between (U.S.) "Wye
>3-phase" and "open delta". It can cause premature hair-loss to one not "up"
>on things-electrical!
>
>Hope this helps, rather than make you seek alcholic beverages! Jan Rowland
>
>

Bubba

OLDER THAN DIRT
Country Bubba
(Actually the inventor of Country and Bubba)

axtein@...
LaGrange, GA

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