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- Newsgroups: sci.electronics
- Path: sparky!uunet!usc!sol.ctr.columbia.edu!zaphod.mps.ohio-state.edu!n8emr!bluemoon!gerry
- From: gerry@bluemoon.rn.com (Gerard M. Foley)
- Subject: Re: Can 220V 50 Hz Stuff be run on US 220V 60 HZ power ?
- Message-ID: <TiHFqB4w165w@bluemoon.rn.com>
- Sender: bbs@bluemoon.rn.com (BBS Login)
- Organization: Blue Moon BBS ((614) 868-998[024])
- References: <1992Aug30.183748.1399@athena.cs.uga.edu>
- Date: Tue, 01 Sep 92 11:14:28 EDT
- Lines: 37
-
- mcovingt@athena.cs.uga.edu (Michael A. Covington) writes:
-
- > There's one BIG possible problem: The grounding is done differently.
- >
- > As I understand it, European 220V service is like American 120V service,
- > in that one side of the line is at ground potential. Right?
- >
- > American 220V service is different. Neither side of the line is grounded.
- > What you have is a 240-volt center-tapped transformer with the center
- > tap grounded. 120-volt service uses half of the transformer, with the
- > center tap as "neutral." 240-volt service uses both sides of the transformer
- >
- > It's overwhelmingly probable that the power supplies in your equipment
- > will expect "neutral" to be grounded, and will fry something if it isn't.
- >
- > The best way to deal with the Amstrad PC is to replace its power supply with
- > an American one, or look inside for a 120v-vs-220v jumper or switch (many
- > computers have them). Ditto the low-powered audio equipment. The huge
- > audio power amplifier will be more difficult; can you replace its
- > power transformer with one that has a 120v primary?
- >
- >
- > --
- > + Michael Covington - Artificial Intelligence Programs - U of Georgia - USA
- > + Unless otherwise noted, these are private opinions, not official statements
- > + VOTE NO GEORGIA LOTTERY - we need not imitate mistakes of other states.
-
- I'll be surprised if your equipment depends on the line for
- a ground. US 120 volt 60 hz stuff doesn't. The frequency
- difference will affect stuff that has synchronous motors, or
- other things that take their frequency from the line. Trans-
- formers should do ok, since they will have more iron than a
- 60Hz one, and should benefit from the higher frequency.
- Good luck, and use the right size fuses.
-
- gerry@bluemoon.rn whose home bbs has trouble getting the
- mail out sometimes, so it may go here instead.
-