>>>>>>>>>>>>>>>>>> Original Message <<<<<<<<<<<<<<<<<<
On 23/07/2003, 22:00:46, <[email protected]> wrote regarding AC
Power variation standard:
> Hello,
> A little off-topic perhaps but ...
> I am currently writing an internal Hardware Quality Assurance standard
and would like to find a reference standard which details AC line voltage
variation.
> For operating ranges, we are currently using:
> - 90 to 125VAC on 100/120VAC nominal
> - 190 to 260VAC on 220/235VAC nominal
> And for Brown-out, we are using:
> - 80VAC for 100/120VAC nominal
> - 160VAC for 220/235VAC nominal
> I have no little idea why these numbers were chosen and would love to
refer to some national or, preferably, international specification. For
once, Google has left me high and dry.
> Any help would be appreciated.
> Thanks,
> Marko
Not perhaps directly related to your product line, but EN 55103-2, the
professional audio standard, specifies voltage dips. These are criterion
B (basically no degradation below a specified level) for a 100% drop of 1
period and criterion C (temporary loss of function with restoration
manual or automatically) for a 60% drop of 5 periods. This is looking at
50 Hz mains frequency and 230 V ac supply. We have no difficulty in
achieving these figures at criterion A (no effect) and with switch mode
power supplies, continual operation at 60% dip. I hope this gives an idea of
the requirements for one standard.
Regards,
Neil Helsby
**********************************************************************
This email and any files transmitted with it are confidential and
intended solely for the use of the individual or entity to whom they
are addressed. If you have received this email in error please notify
the system manager.
This footnote also confirms that this email message has been swept by
MIMEsweeper for the presence of computer viruses.
www.mimesweeper.com
**********************************************************************
This message is from the IEEE EMC Society Product Safety
Technical Committee emc-pstc discussion list.
Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/
To cancel your subscription, send mail to:
[email protected]
with the single line:
unsubscribe emc-pstc
For help, send mail to the list administrators:
Ron Pickard: [email protected]
Dave Heald: [email protected]
For policy questions, send mail to:
Richard Nute: [email protected]
Jim Bacher: [email protected]
Archive is being moved, we will announce when it is back on-line.
All emc-pstc postings are archived and searchable on the web at:
http://www.ieeecommunities.org/emc-pstc
