In message <vah2ctyzfrlgf...@jmwa.demon.co.uk>, dated Wed, 11 Jul 2007, John Woodgate <j...@jmwa.demon.co.uk> writes:
>I don't have much respect for the 'routine test' requirements; IR is >IMPORTANT and I guess it was only eliminated to save 100 ms test time. I think a few thousand more words are necessary. From the safety point of view, the **immediate** hazard is leakage current and that is dominated by current through EMC filter capacitors in almost all products these days. But IR measures the integrity of insulation WITHOUT the swamping effect of capacitor current, so in fact it IS very important and should be checked in production, as it is in periodic field testing. -- 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 ______________________________________________________________________
