RE: Creepage on PCB acc to 60950-1
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 "60950:1999" is obsolete.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 __
RE: Creepage on PCB acc to 60950-1
> From: Amund Westin > Sent: Tuesday, March 13, 2007 10:13 AM > 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? Amund - There are too many things to take into consideration and your description doe not encompass all possibilities. I can only recommend to read all of ยง2.10 and Annex F. Regards, Peter L. Tarver, PE ptar...@ieee.org CONFIDENTIALITY This e-mail message and any attachments thereto, is intended only for use by the addressee(s) named herein and may contain legally privileged and/or confidential information. If you are not the intended recipient of this e-mail message, you are hereby notified that any dissemination, distribution or copying of this e-mail message, and any attachments thereto, is strictly prohibited. If you have received this e-mail message in error, please immediately notify the sender and permanently delete the original and any copies of this email and any prints thereof. ABSENT AN EXPRESS STATEMENT TO THE CONTRARY HEREINABOVE, THIS E-MAIL IS NOT INTENDED AS A SUBSTITUTE FOR A WRITING. Notwithstanding the Uniform Electronic Transactions Act or the applicability of any other law of similar substance and effect, absent an express statement to the contrary hereinabove, this e-mail message its contents, and any attachments hereto are not intended to represent an offer or acceptance to enter into a contract and are not otherwise intended to bind the sender, Sanmina-SCI Corporation (or any of its subsidiaries), or any other person or entity. _ Scanned by Sanmina-SCI eShield ___ _ - 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 __
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 __