In message <[email protected]>, dated Thu, 19 Jun 2008, Jim Eichner <[email protected]> writes:
>The reason for my enquiry is standards committee work. We are >importing this Limited Power Sources section, and it doesn't seem right >to not allow auto-reset electro-mechanical devices. At the very least, >we should allow them with a condition that they comply with a relevant >standard that tests them for adequate cycle life (perhaps one of the >60730 series, but I'm sure there are more relevant standards for >breakers and protectors that are electro-mechanical). Restrictive provisions that were justified when they were put in stay in standards until someone proposes to delete or modify them in the light of improvements in device performance. That's what you are now doing. You might look at IEC 60934:2007 to see what it says about durability and reliability. I doubt that you would get very far with an approach through your national committee to IEC TC108 to amend IEC 60950-1 at this time, because it is pre-occupied with IEC 62368, but you might try, through you national committee, to get IEC SC22E, responsible for IEC 60934, to make a formal approach to TC108 if you can make a case for the provision to be reviewed. At the same time, you could raise the matter as a comment on the corresponding provision in IEC 62368. It's in Annex S of 108/276/CDV. -- OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk Either we are causing global warming, in which case we may be able to stop it, or natural variation is causing it, and we probably can't stop it. You choose! John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to [email protected] 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] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
