Hi Amund, I have experienced a CE Marked power supply, which was used to replace an existing one failing EMC EN55022 as part of the system i.e. Product + Power Supply. This was purchased to the same specification but from a different manufacturer. It seems that power supply manufacturers tend to EMC test their products with resistive loads only and not always at full load. Also, the loading is obviously different when connected to an actual product.
In my opinion you must always re-test the system when one of the major sub-assemblies or components are changed, including alternative parts. You are responsible for the system EMC. The power supply manufacturer is not responsible for his CE marked power supply (assuming he has valid reports etc. to back up his Declaration of Conformity) failing in the system. The rule CE + CE not= CE is a valid statement unless proven otherwise (tested). Always abide by this and you won't go wrong. I hope this helps! Regards ALEX -----Original Message----- From: am...@westin.org [mailto:am...@westin.org] Sent: Thursday, August 16, 2001 10:33 PM To: emc-p...@majordomo.ieee.org Subject: EMC and power supply Hi all, 1. We plan to EMC test a stand alone power supply (PS1) 2. We have an IT product which has passed the EMC test. 3. We want to remove the current power supply in the IT product and replace it with the power supply (PS1) after it has passed the EMC tests. If power supply (PS1) pass the EMC test, do we have to make any re-tests on the IT product ? I recall some talks about CE+CE not CE. Any suggestions ? Best regards Amund Westin, Oslo/Norway -- Get your firstname@lastname email for FREE at http://Nameplanet.com/?su ------------------------------------------- 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: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson: pstc_ad...@garretson.org Dave Heald davehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://www.rcic.com/ click on "Virtual Conference Hall," ------------------------------------------- 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: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson: pstc_ad...@garretson.org Dave Heald davehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://www.rcic.com/ click on "Virtual Conference Hall,"
