I read in !emc-pstc that POWELL, DOUG <[email protected]> wrote (in <[email protected]>) about 'IEC 60664-4 concerns' on Fri, 13 Jun 2003: > I've been studying IEC 60664-4, "Insulation coordination for equipment > within low-voltage systems - Part 4: Consideration of high-frequency > stress." > > My intent is to determine reasonable safety spacings for air gaps, > insulators and thin film insulators at high frequencies. So far, the > standard does not seem to be very helpful. It presents limited empirical > data on a selection of insulating materials but really does not offer any > practical application, in general. In addition, it appears there is no > information for frequencies above 100 MHz.
Exactly. There is a notable lack of research results on this subject. The standards committee cannot work without input data. > I am interested in > characterizing a number of material types and factor in frequencies up to > 300 MHz and higher. You may well need to get some original applied research done on your specific project. -- Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk Interested in professional sound reinforcement and distribution? Then go to http://www.isce.org.uk PLEASE do NOT copy news posts to me by E-MAIL! This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: [email protected] Dave Heald: [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
