In message <[email protected]>, dated Tue,
7 Feb 2012, Brian Oconnell <[email protected]> writes:
Have noted that IEC61293 is referenced in 60601, but is not in 1010 or
950. Do not understand because 61293 is published in LVD, but not in
MDD.
Believe that 61293 says that the 'x/y' rating for a power supply
indicates that must be manually switched between the various voltages.
How does that affect a power supply rated for auto-sense (no user
select required)? Unless we have a phrase or symbol to indicate an
auto-sense and a user-selected input, can we consider 61293 harmonized?
1. It does exist as an EN, but what do you understand by 'harmonized'?
2. It gives three cases:
- 110/220 -> you need to switch: only 110 and 220
- 110/220 AUTO -> you don't need to switch: only 110 and 220
- 110-220 or 110...220 -> you don't need to switch; any voltage between
110 and 220.
We make some stuff that is rated 120/240, or 100-120/200-240 - but can
be plugged into 85V to 265V with no user select.
Doug Powell advised use of '!' notation for user manual. Other ideas?
Also, why such a long time to stability date? Typically 3 to 5 years?
Standards are reviewed regularly, and the responsible committee can set
the review period at anything between 3 years and 12 years. This
standard was probably last reviewed in 2004. TC100 and JTC1 have
'stabilized standards' that are not reviewed for 15 years, but a
proposal for review and change can be made at any time.
--
OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk
John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK
If 'QWERTY' is an English keyboard, what language is 'WYSIWYG' for?
-
----------------------------------------------------------------
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 <[email protected]>
All emc-pstc postings are archived and searchable on the web at:
http://www.ieee-pses.org/emc-pstc.html
Attachments are not permitted but the IEEE PSES Online Communities site at
http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used
formats), large files, etc.
Website: http://www.ieee-pses.org/
Instructions: http://listserv.ieee.org/request/user-guide.html
List rules: http://www.ieee-pses.org/listrules.html
For help, send mail to the list administrators:
Scott Douglas <[email protected]>
Mike Cantwell <[email protected]>
For policy questions, send mail to:
Jim Bacher: <[email protected]>
David Heald: <[email protected]>
