I read in !emc-pstc that Paolo Peruzzi <[email protected]> wrote (in <[email protected]>) about 'voltage dips' on Tue, 22 Jul 2003:
>Is there any basic standard concerning voltage dips and short >interruptions immunity for equipment with input current larger than 16 >amps per phase? Not at present. The omission has been noted in UK, but not drawn to the attention of IEC, AFAIK. IIRC, there seems to be no particular reason why the scope of this standard is limited to 16 A per phase and below. Most of the text seems to be applicable only to *single-phase or interphase* equipment, though. Clause 7 and clause 8.2.1 differ in their statements about simultaneous and differential disturbances on 3-phase supplies. >And more: can a product standard prescribe such test for >equipment with more than 16 amps per phase and still refer to 61000-4-11 >as basic standard? Well, sort of. It could say, 'The test methods specified in IEC 61000-4-11 shall be applied.' But the product standard would have to say something about the specification of the test equipment to be used, because clause 6 doesn't apply. Annex C appears independent of the current. -- 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] Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
