RE: Re: (OT) Voltage USA- UK

["Paul Watkin" <groups@xxxxxxx>]

Coould you not just use an online UPS?

I'm sure I read about some of the larger APC UPS's having the capability to
provide clean mains (frequency corrected etc) from inputs such as
transformers, as essentially the UPS is working 100% of the time. The
incoming mains is effectively just being used to charge the batteries

Cheers

Paul

-----Original Message-----
From: David Buckley [mailto:db@xxxxxxx]
Sent: 26 January 2004 06:51
To: ukha_d@yahoogroups.com
Subject: [ukha_d] Re: (OT) Voltage USA- UK

--- In ukha_d@yahoogroups.com, "Robert Crawshaw"
<golcarbob@b...>
wrote:

Well, 221 pages of manual later I can say these are very impressive
devices.
But the bit about the output cabling to the motor having to be shielded and
described as electrically noisy got me googling.

It appears that typical VFDs do not output a sine wave.

http://www.mtecorp.com/techpaper.html

Something that ugly is no use, even at a bargain price.

Now a sine wave output VFD would be of interest....!



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