Phil --
It is typical for many standards to run voltage sensitive tests (temperature
rise, for example, as I recall) at the labeled voltage PLUS a percentage (6 to
10 %, as I recall). That percentage is intended to cover the utility supply
tolerances.
So a product labeled 100-240 Vac will often face a test at 264 Vac.
Occasionally one might find a product labeled 85-264, but in my opinion that is
most likely a mistake, because it would need to be tested at 290 Vac for a
standard that requires a 10% overvoltage test, and I am not aware of any supply
tolerances that would allow 290 Vac.
Word to the wise: Australia's nominal voltage is now 230 Vac, but it has legacy
systems that still supply at 240 Vac. So a typical national difference for
Australia is to perform your tests AS IF the rated voltage was 240 Vac. This
means an extra test or two if you're taking a product rated for 230 Vac for the
EU market and want to sell it in Australia.
Mike Sherman
Sherman PSC LLC
> On 05/06/2023 4:09 AM CDT Agar, Philip (Leonardo, UK)
> <220ac8787b71-dmarc-requ...@listserv.ieee.org> wrote:
>
>
> Please could someone advise me on what standard, if any, might compel a
> manufacturer to rate the operating voltage of their equipment to at least
> cover the utility supply tolerance of the region in which it is being sold?
> For example, a DoC for an IT item sold in the UK claims conformance with the
> requirements of LVD Directive 2014/35/EU and EN62368-1:2014+A11:2017 but it
> is not clear to me that the specified voltage rating of 100 - 240 Vac
> necessarily covers UK utility supply tolerance of up to 253 Vac, or even in
> much of the EU at 243.8 Vac.
>
> Thanks,
> Phil Agar
> EMC Compliance
>
>
>
>
> -
>
> This message is from the IEEE Product Safety Engineering Society emc-pstc
> discussion list. To post a message to the list, send your e-mail to
>
>
> All emc-pstc postings are archived and searchable on the web at:
> http://www.ieee-pses.org/emc-pstc.html
>
> Website: http://www.ieee-pses.org/
> Instructions: http://www.ieee-pses.org/list.html (including how to
> unsubscribe)
> List rules: http://www.ieee-pses.org/listrules.html
>
> For help, send mail to the list administrators:
> Mike Cantwell
>
> For policy questions, send mail to:
> Jim Bacher:
> David Heald:
> _
> To unsubscribe from the EMC-PSTC list, click the following link:
> https://listserv.ieee.org/cgi-bin/wa?SUBED1=EMC-PSTC&A=1
-
This message is from the IEEE Product Safety Engineering Society emc-pstc
discussion list. To post a message to the list, send your e-mail to
All emc-pstc postings are archived and searchable on the web at:
http://www.ieee-pses.org/emc-pstc.html
Website: http://www.ieee-pses.org/
Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe)
List rules: http://www.ieee-pses.org/listrules.html
For help, send mail to the list administrators:
Mike Cantwell
For policy questions, send mail to:
Jim Bacher:
David Heald:
_
To unsubscribe from the EMC-PSTC list, click the following link:
https://listserv.ieee.org/cgi-bin/wa?SUBED1=EMC-PSTC&A=1
