David,
Here is my understanding based on an earlier discussion on this forum
and some of our business experiences. The agreement amongst many high
volt countries was on a 220-240V range. This implies a 230V nominal.
The 240V countires agreed, but never changed their nominals, as this
would have involved serious changes to their power generation equipment.
Their reasoning was that a product rated at 220-240V is required under
IEC 60950 and like standards to be tested up to 6% over rated voltage,
i.e. a max of 254V. They assumed they could deliver power to the end
users within this range without changing their nominals.
I'm beginning to doubt this assumption as we have had numerous reports
of our direct plug-in external power supplies running "hot" in two
geographies only, viz. the U.K. and Australia/New Zealand. Since we
have specified and tested up to 254V without problems, it is my belief
that the end users may be seeing over 254V on low periods of the day.
High usage periods result in more IR drop along the transmission paths,
and reduce the end voltage.
This is just my opinion based on my experiences.
George Alspaugh
Lexmark International Inc.
gelfand%memotec....@interlock.lexmark.com on 02/02/2001 10:56:22 AM
Please respond to gelfand%memotec....@interlock.lexmark.com
To: emc-pstc%majordomo.ieee....@interlock.lexmark.com
cc: (bcc: George Alspaugh/Lex/Lexmark)
Subject: 230 Vac or 240 Vac?
Group,
I seem to remember that Australia was changing their nominal voltage from 240 to
230 V. Is this true? Are there other countries that have nominal voltages of
240 V? I want to determine the maximum voltage for leakage current tests.
Best regards,
David.
David Gelfand
Regulatory Approvals
Memotec Communications Inc.
Montreal Canada
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