John, Do they supply an average and what the standard deviation is? And, does it follow a Gaussian distribution?
Designing for the case of 19 out of 20 sites doesn't make me comfortable. I would want to design for the highest percentage of sites while balancing the manufacturing costs. Dave Cuthbert Micron Technology From: [email protected] [mailto:[email protected]] On Behalf Of John Woodgate Sent: Thursday, July 21, 2005 10:09 AM To: [email protected] Subject: Re: AC mains impedance Ralph McDiarmid <[email protected]> wrote (in <[email protected]>) about 'AC mains impedance', on Thu, 21 Jul 2005: >Didn't the IEC publish a number for maximum expected impedance of the >50Hz public system in Europe? I recall something like 0.4+0.2j IEC TR 60725. 0.4 + j0.25 ohm. It isn't the maximum, it's the value at the point of common connection which is not exceeded at 90% of sites. It's information on North American systems which is meagre. -- Regards, John Woodgate, OOO - Own Opinions Only. Deadlines are 90% of deadliness. http://www.jmwa.demon.co.uk Also see http://www.isce.org.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/listserv/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: Richard Nute: [email protected] Jim Bacher: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc 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/listserv/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: Richard Nute: [email protected] Jim Bacher: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
