When I am not mistaken, then VDE0871 required testing starting at 9 kHz. When EMI requirements hit our shores, two tests were run (by some "smart" manufacturers) one per VDE0871 with a "European Line Filter" and another with a cheaper "FCC Filter". In one particular equipment, there was a peak at 120 kHz, which required that the VDE filter be used (for export), and the local configuration started testing at 150 kHz, all legit. The problem came up when several units were installed in the US, and the remote control of the lights went crazy (the control used 120 kHz as carrier frequency), until the quantity of units was reduced to the original one unit. Well, the "fix" was to install VDE filters, and everything was quiet. This exercise was quite expensive and helped me to convince management to test and verify that there were no - or not too much - emissions below 150 kHz, and a decent filter was used in the future when necessary for domestic and export products. Bogdan. John: Why would you want to eat mink?
John Woodgate wrote: > I read in !emc-pstc that gunter_j_ma...@embraco.com.br wrote (in > <offe76605a.acd9696b-on83256b04.00537...@embraco.com.br>) about > 'Conducted emisions - frequencies lower than 150kHz', on Wed, 14 Nov > 2001: > > > >List > > > >Nowadays, we run conducted EMI tests according to EN55014-1 to household > >appliances. > >The frequency range is 150kHz up to 30MHz. > >Is there any standard or project to impose limits to lower frequencies ? > > > There is a general *trend* to extend control of emissions down to 9 kHz > and up from 2/2.4 kHz to 9 kHz. But this involves a revision or > amendment of the standard, so an adequate transition period will be > given. To get an idea of what *might* be added, see CISPR15/EN55015. > -- > Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk > Eat mink and be dreary! > > ------------------------------------------- > 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: > No longer online until our new server is brought online and the old > messages are imported into the new server. ------------------------------------------- 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: No longer online until our new server is brought online and the old messages are imported into the new server.
