In message <[email protected]>, dated Tue, 6 Feb 2007, "Kunde, Brian" <[email protected]> writes
>Can the maximum continuous fault current be defined by examining the >characteristics of the over current protection device? From that value, >can the PE trace be so defined and will such trace handle the inrush >seen during a fault without damage? Not necessarily. You need to check both conditions. >Will such a trace survive the "Protective Earth Trace Ground Fault >Current Test"? That's what I advised you to find out by testing. > >I can't perform tests unless there is a PCB to test and I can't get a >PCB made up until I tell the CAD engineer how wide to make the traces. Ask for a test board with a succession of traces of different widths and test them, starting with the widest, so you don't damage the board until you hit the first one that's too narrow. This is much quicker than deliberating about it, and the result is much more certain. You could have a proven answer 30 minutes after getting the test board. -- OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk There are benefits from being irrational - just ask the square root of 2. John Woodgate, J M Woodgate and Associates, Rayleigh, Essex 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/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: Jim Bacher: [email protected] David Heald: [email protected] 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 ______________________________________________________________________
