In message <b11802460b4f4b4e963b51adf2fae08b04c4a...@usmafrexmb02.bose.com>, dated Mon, 19 Mar 2007, "Tyra, John" <john_t...@bose.com> writes:
>Seems pretty clear to me but, since these are not legal modifications >to the standard(s) in questions, it depends on the Agency you are >dealing with as to whether they are willing to accept these decisions. OSM interpretations are valid in Europe unless, in a particular case, a test house can give valid reason(s) to reject it. And many are adopted by CENELEC as official interpretations by CENELEC TC108. However, this particular interpretation can be a bit misleading insofar as it concentrates on reasoning related to overvoltage (installation categories) rather than to single-fault input current, which is what the agency may have in mind. The agency in question should take into account that every power supply made has an electrolytic capacitor after the rectifier and there are no safety-related 'approvals' for these capacitors when subjected to alternating supply. -- OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk There are benefits from being irrational - just ask the square root of 2. 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 emc-p...@ieee.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 emcp...@ptcnh.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: emc-p...@daveheald.com All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email ______________________________________________________________________
