I read in !emc-pstc that Pettit, Ghery <ghery.pet...@intel.com> wrote (in <D9223EB959A5D511A98F00508B68C20C0226B8A3@ORSMSX108>) about 'EN 61000-3-3 compliant heater controller', on Mon, 21 Jan 2002:
>So rather than educating the public on the cause of flicker, we get saddled >with a useless design requirement. 'Educating the public' is a project which always causes disaster. It simply isn't industry's job to do that. Besides, it isn't a 'useless' requirement. The reason I gave is the reason that repetitive voltage changes are called 'flicker'. But they are undesirable in themselves: they can disturb the operation of equipment. > Typical bureaucracy - don't fix the >problem, make it LOOK like you're doing something, at someone else's >expense. Just like the harmonics standard - fix a problem that doesn't >exist. Harmonics DO cause problems. Even in USA, where, because of the design of the distribution system, harmonics are less threatening than in other countries, there are still problems with hot neutrals due to summation of triplen harmonics. -- Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk After swimming across the Hellespont, I felt like a Hero. 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: 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.
