In message <be3336be85968d49be01e66d6e365b1e01921...@sjc1amfpew01.am.sanm.corp>, dated Mon, 5 Feb 2007, "Tarver, Peter" <[email protected]> writes >I have performed around six to ten of these tests at the 200 A level. >In each case, the circuit breaker I used opened in less than half a >cycle.
But there are breakers (in Europe, anyway) which have a delay to cope with high inrush currents. >I have experienced no noncompliances. In fact, the earthing impedance >_improved_ after the fault condition was imposed. Any joints with 'asperities' (roughnesses with points) or semi-conducting oxide layers become welded when the high current passes. -- 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 ______________________________________________________________________
