John I would disagree. I'm generalizing and there are exceptions to my statements. Incandescent light bulbs are fairly linear (at the high end). Computers and motors tend to be constant power. Ballasted devices (florescent lights) tend to be constant current which also translates to constant power. Obviously there is going to be some trade-offs but, overall, I would think the savings in copper losses would make the higher voltages more economical.
Fred Townsend John Woodgate wrote: > clip... > > This advice seems to me a bit surprising. I suspect that a lot of the > load is linear, so that a higher voltage gives a HIGHER current, not a > lower current. I will ask some people about that. > >> Thru recent return record and investigation, the domestic mains >> voltage is at a higher side, > or = 250 Vac and the failure return >> rides up significantly. The manufacturers design their product at EU >> rated 230 Vac and assume the product operates at the highest voltage >> of 254 Vac occasionally. Now, the product is operating at the higher >> voltages all the time. It results in shortening its life or causing >> early failure. > > > Now that you know it's happening, you can, and of course should, > design with that in mind. - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <emc-p...@ieee.org> All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <emcp...@ptcnh.net> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com>
