forwarding for joe.ross...@avocent.com ____________________Reply Separator____________________ Subject: RE: EN 61000-3-3 Author: "Rosswog; Joe" <joe.ross...@avocent.com> List-Post: emc-pstc@listserv.ieee.org Date: 9/12/00 2:00 PM
Gert, Thank you for the definitive answer, but what do you mean by "Beware of the new requirement for in-rush current though !!!!"? Joe Rosswog > -----Original Message----- > From: Gert Gremmen [SMTP:cet...@cetest.nl] > Sent: Tuesday, September 12, 2000 1:15 PM > To: Brooks, Barbara; EMC Post > Cc: joe.ross...@avocent.com > Subject: RE: EN 61000-3-3 > > Hi Barbara and group, > > Unlikely means that the equipment has no variations in power supply > current, > or variations that cause voltage fluctuations are below the most stringent > level in the standard. Just evaluate the (Imax. - Imin. = Idifference) > RMS-current during a full operating cycle and compare to the required > level > (after multiplying with the reference impedance). > > If you want to dig further in it you can make a conservative estimation of > the number of variations per minute. Take the highest (fastest) value you > can find, and compare to the appropriate entry in the flicker table. > > In general: > - equipment with a power consumption below 100 VA max is unlikely to > create > flicker problems. > > - Most equipment under 500 VA will not create flicker problems > > - Many equipment over 500 VA will create flicker problems only if > switching > full load on and off in a rhythm faster then once per second > > - Equipment over 1000 VA that has switching cycles is likely to cause some > form of flicker and certainly needs evaluation. > > > > Beware of the new requirement for in-rush current though !!!! > > Regards, > > Gert Gremmen, (Ing) > > ce-test, qualified testing > > =============================================== > Web presence http://www.cetest.nl > CE-shop http://www.cetest.nl/ce_shop.htm > /-/ Compliance testing is our core business /-/ > =============================================== > > > >>-----Original Message----- > >>From: owner-emc-p...@ieee.org [mailto:owner-emc-p...@ieee.org]On Behalf > >>Of Brooks, Barbara > >>Sent: Tuesday, September 12, 2000 4:10 PM > >>To: EMC Post > >>Cc: joe.ross...@avocent.com > >>Subject: EN 61000-3-3 > >> > >> > >> > >> > >>Does any one have any information regarding how you determine if > equipment > >>will not product significant voltage fluctuations or flicker with out > >>performing the tests of EN 61000-3-3 per Paragraph 6.1? > >> > >>EN 61000-3-3 Paragraph 6.1 states "Test shall not be made on > >>equipment which > >>is unlikely to product significant voltage fluctuations or flicker." > >> > >> > >>Barbara Brooks > >>Wyle Laboratories > >>7800 Highway 20 West > >>Huntsville, AL 35807-7777 > >>(256) 837-4411 ext 595 > >>(253) 721-0144 Fax > >>bbro...@hnt.wylelabs.com > >> ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. 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: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson: pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org
