looks like some of your messages are taking 9 hours to post on this list.
any reason for this filter delay? Christopher --- On Tue, 5/20/08, [email protected] <[email protected]> wrote: From: [email protected] <[email protected]> Subject: Re: 61000-4-11 Inrush current To: [email protected], [email protected] Date: Tuesday, May 20, 2008, 11:00 AM Hi Bob: I have a copy of IEC61000-4-11:1994. Take another look at clause 6.1.1. It says the peak inrush current drive capability '... need not exceed 500A for 220V-240V mains, or 250A for 100V-120V mains.' For a minimum capability, look at clause 6.2.2. It says that 'the measured EUT peak inrush current shall be less than 70% of the peak current drive capability of the generator, ...' Ipk.EUT < 70% * Ipk.generator Solving for Ipk.generator gives: Ipk.EUT * 143% < Ipk.generator Note the special test conditions for measuring the EUT peak inrush current in Annex A. So your generator needs to be capable of a peak current between Ipk.EUT * 143% and 500A. As far as your 'AC fault' information is concerned, ask your associate where it is documented. Pat Lawler EMC Engineer SL Power Electronics Corp. [email protected] wrote on 05/20/2008 05:11:26 AM: > A question came up recently where I work about the current > requirements of the AC source used for testing voltage dips and > interrupts. I was told the scope of the standard is for products up to 16A and that *includes* inrush current during turn-on. > I referenced table 6.1.1 where the peak inrush current capability must be 500A for 200 - 240v mains voltage, but was told this table only covers AC fault conditions, not normal operations (including turn-on). > Since one of the tests is a >95% interruption for 5 seconds, would this be considered an AC fault, or a normal turn-on for the EUT? > Appendix A sure makes it sound like the inrush requirement is for the power-up of the EUT. - ---------------- ----------------------------------------------- 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: - ---------------------------------------------------------------- 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
