I read in !emc-pstc that Pat Lawler <[email protected]> wrote (in <[email protected]>) about 'Medical devices and voltage dip testing' on Thu, 29 Apr 2004: >EN60601-1-2:2001 (EMC requirements for general medical devices) requires various >voltage dip tests at the extremes of the rated input voltage range. >If a product is rated for 100-240Vac operation, this means test levels like >40Vac for 100ms (100Vac/50Hz nominal input, 60% dip for 5 cycles). The >performance criteria makes this especially difficult - "The system shall provide >essential performance". > >This looks like a major design change for many of our power supplies. > >What has been the experience of list members designing power supplies or systems >to meet this requirement? Have you found it to be a minor design challenge, or >are you still figuring out how to meet the test requirement?
It looks very much as though the 'world-wide' power supplies weren't properly taken into account by TC 62 or SC62A. I suggest you contact people concerned with those committees and ask them. There is a list of officers available form the public part of the IEC web site: http://www/iec.ch -- Regards, John Woodgate, OOO - Own Opinions Only. The good news is that nothing is compulsory. The bad news is that everything is prohibited. http://www.jmwa.demon.co.uk Also see http://www.isce.org.uk This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ieee-pses.org/ 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://www.ieeecommunities.org/emc-pstc
