I guess you could argue that inrush (or startup) current is a voltage change that was never specifically ignored by the standard and thus is covered. In this case, I think some of the test equipment manufacturers missed the boat by not providing a specific procedure for capturing this. Either way, I don't this is clear and it is no clearer in the amendment. Annex B addresses a specific method for measuring inrush current due to the variable conditions created by mechanical contact closures. I don't think it's right to say that this is a proper method or improper method. At best, it's simply a suitable method. Therefore, the statement that inrush current was included from the start, but was not dealt with properly is still true even with the amendment.
Regards, Glenn Lesmeister Product Regulatory Compliance The New HP Tel: 281-514-5163 20555 SH 249, MS60607 Fax: 281-514-8029 Houston, TX 77070-2698 Pgr: 713-786-4930 [email protected] -----Original Message----- From: John Woodgate [mailto:[email protected]] Sent: Tuesday, September 10, 2002 1:55 AM To: [email protected] Subject: Re: Inrush and EN61000-3-3 I read in !emc-pstc that Joshua Wiseman <[email protected]> wrote (in <[email protected]>) about 'Inrush and EN61000-3-3' on Mon, 9 Sep 2002: >I had a similar question about a year ago. The response I got is that there >is a future version that has this referenced in Annex B. I am not sure of >the details of it though. The amendment, as an amended edition, was published in June 2001. Annex B is specifically about how to measure inrush current caused by manual switching. In fact, inrush current was included from the start, but it wasn't dealt with properly in the text before the amendment was issued. -- Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk Interested in professional sound reinforcement and distribution? Then go to http://www.isce.org.uk PLEASE do NOT copy news posts to me by E-MAIL! ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: [email protected] Dave Heald: [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list" ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: [email protected] Dave Heald: [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list"
