Determine installation environment, measure Working V, add I.T. safety standard, stir well.
For a SMPS, only the MINIMUM creepage is determined by the rated input V; otherwise is determined by empirical measurements of the WV across a particular dim. "60950:1999" is obsolete. R/S, Brian > -----Original Message----- > From: emc-p...@ieee.org [mailto:emc-p...@ieee.org]On Behalf Of Amund > Westin > Sent: Tuesday, March 13, 2007 9:13 AM > To: emc-p...@ieee.org > Subject: Creepage on PCB acc to 60950-1 > > > Trying to find out the different required creepage distances > on a PCB (it's > an AC/DC PSU) where the primary voltage is 230VAC avd > secondary voltage is > 24VDC. > > Interested in creepage distances > 1) primary to secondary on the PBC > 2) Primary to chassis > 3) Secondary to chassis > 4) Between primary leads on the PCB > > I have the 60950:1999 in front of me and a lot of "creepage tables" in > chapter 2.10.4. > > Anyone out there who could give me a short guidance how to > interpret the > tables in my case? > > Thanks. > > #Amund - 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 ______________________________________________________________________
