I read in !emc-pstc that Sam Wismer <swis...@acstestlab.com> wrote (in <001701c2a514$be662790$0b01000a@sam>) about 'Euro AC Power Source' on Mon, 16 Dec 2002: > > Hi Group, > > Its been a long time since my last post. Hope everyone has been well.
I have a bad cold. All together now, 'Ahhh'. (;-) > > > > We have a several AC power sources that can provide 230Vac/50Hz power. > Only > one however provides true Euro power in that it provides 230VAc on the > line > side. This unit only has around 6 amps of capacity. We need to be able > to > provide at least 20amps. > > > > We have 2 other units with higher current capacity, but the 230 Volts can > only be provided via 115V on L1 and L2 to ground. I have been told by > some, > that using this power source is acceptable for emissions and immunity > testing. Id like some feedback on that. I can justify it, perhaps, for > radiated emissions, radiated fields, ESD and perhaps magnetic fields, but > I > am skeptical that this would be okay for AC mains testing that apply > immunity at various phase angles and also for EN 61000-3-2 and -3. Any > comments? It's NOT OK for conducted emissions or immunity. It IS OK for everything else, AFAICS, including harmonics and voltage changes. > > > > Another question, we have tried using a 2:1 transformer to step up the > 115, > but we end up with about 60Volts of bleed over to the other line. Is this > typical of transformers? Anyway to prevent this? > It probably doesn't matter, as another post said. But why don't you use a 1:1 double-wound transformer fed across L1-L2, to give you a secondary you can ground at one end? -- 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: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list"
