Thanks everyone, I believe I’ve found the right person to help. I believe the question was all about monitoring/understanding power distribution systems in large buildings.
Cheers, Ken _______________________ I'm here to help you succeed! Feel free to call or email with any questions related to EMC or EMI troubleshooting - at no obligation. I'm always happy to help! Kenneth Wyatt Wyatt Technical Services LLC 56 Aspen Dr. Woodland Park, CO 80863 Phone: (719) 310-5418 Web Site <http://www.emc-seminars.com/> | Blog <https://design-4-emc.com/> The EMC Blog (EDN) <https://www.edn.com/electronics-blogs/4376432/The-EMC-Blog> Subscribe to Newsletter <http://www.emc-seminars.com/Newsletter/Newsletter.html> Connect with me on LinkedIn <https://www.linkedin.com/in/kennethwyatt/> > On Jun 28, 2020, at 7:23 PM, Curt McNamara <curt...@gmail.com> wrote: > > Noise in the ground? With respect to what? :-) > > The ground should be protective earth and carry no energy. The neutral will > carry some energy in most systems, and a system with multiple neutral / > ground connections could also have ground 'loops'. I dislike that term ... > > Anyway a good power line monitor will have an isolated power supply and be > able to characterize ground 'noise' (i.e. common mode?). > > Ground 'noise' should be common mode, and a few hours with Henry Ott's text > should help them think through that. > > Assuming there is ground noise, an isolated supply may be their answer ... > > Curt > > http://www.hottconsultants.com/ <http://www.hottconsultants.com/> > > > On Sat, Jun 27, 2020, 8:36 PM Ken Wyatt <k...@emc-seminars.com > <mailto:k...@emc-seminars.com>> wrote: > Sorry I may not have been clear enough, but I got the idea they were looking > for someone to advise them on power line noise in buildings - like using a > power line monitor, or similar, in the ground wiring. > > Ken > > _______________________ > > I'm here to help you succeed! Feel free to call or email with any questions > related to EMC or EMI troubleshooting - at no obligation. I'm always happy to > help! > > Kenneth Wyatt > Wyatt Technical Services LLC > 56 Aspen Dr. > Woodland Park, CO 80863 > > Phone: (719) 310-5418 > > Web Site <http://www.emc-seminars.com/> | Blog <https://design-4-emc.com/> > The EMC Blog (EDN) > <https://www.edn.com/electronics-blogs/4376432/The-EMC-Blog> > Subscribe to Newsletter > <http://www.emc-seminars.com/Newsletter/Newsletter.html> > Connect with me on LinkedIn <https://www.linkedin.com/in/kennethwyatt/> > >> On Jun 27, 2020, at 6:13 PM, Ken Javor <ken.ja...@emccompliance.com >> <mailto:ken.ja...@emccompliance.com>> wrote: >> >> Replying to all here because the first time I just did a list reply and was >> rejected by the list server. >> >> Seems as if we need answers to more questions before making a >> recommendation, technical or personnel. >> >> Why are they interested in this? For any device meeting FCC/CISPR-type EMI >> requirements the individual load steady-state contribution can be bound by >> considering the conducted emission limit to be all common mode. And then >> there is some sort of rss summation, in the frequency and time domains. >> There may be some heavy loads switching below 150 kHz, but they should be in >> a minority. >> >> Current? Voltage? If voltage, at what point: outlet or breaker box or... ? >> >> Knowing what their concern is would go a long ways towards defining what the >> problem solution is, and who might be the best at solving it. >> >> >> Ken Javor >> Phone: (256) 650-5261 >> >> From: Ken Wyatt <k...@emc-seminars.com <>> >> Reply-To: Ken Wyatt <k...@emc-seminars.com <>> >> Date: Sat, 27 Jun 2020 15:01:31 -0600 >> To: <EMC-PSTC@LISTSERV.IEEE.ORG <>> >> Subject: [PSES] Power line noise expert? >> >> Hi All, >> >> I had an inquiry from someone who would like some help with power line noise >> specifically in buildings. This is really outside my specialties, so was >> wondering who on the list I could recommend to them? >> >> Here’s the original question: >> >> I have interest in better understanding of a building's power distribution >> network and more specifically with quantifying the EMI that is observed on >> the AC power safety ground. The frequency range is DC to 1MHz, low-frequency >> range. >> >> Who could help with this? >> >> Thanks, Ken >> _______________________ >> >> I'm here to help you succeed! Feel free to call or email with any questions >> related to EMC or EMI troubleshooting - at no obligation. I'm always happy >> to help! >> >> Kenneth Wyatt >> Wyatt Technical Services LLC >> 56 Aspen Dr. >> Woodland Park, CO 80863 >> >> Phone: (719) 310-5418 >> >> Web Site <http://www.emc-seminars.com <http://www.emc-seminars.com/>> | >> Blog <https://design-4-emc.com <https://design-4-emc.com/>> >> The EMC Blog (EDN) >> <https://www.edn.com/electronics-blogs/4376432/The-EMC-Blog >> <https://www.edn.com/electronics-blogs/4376432/The-EMC-Blog>> >> Subscribe to Newsletter >> <http://www.emc-seminars.com/Newsletter/Newsletter.html >> <http://www.emc-seminars.com/Newsletter/Newsletter.html>> >> Connect with me on LinkedIn <https://www.linkedin.com/in/kennethwyatt/ >> <https://www.linkedin.com/in/kennethwyatt/>> >> >> - >> ---------------------------------------------------------------- >> >> 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.ieee-pses.org/emc-pstc.html >> <http://www.ieee-pses.org/emc-pstc.html> >> >> Attachments are not permitted but the IEEE PSES Online Communities site at >> http://product-compliance.oc.ieee.org/ >> <http://product-compliance.oc.ieee.org/> can be used for graphics (in >> well-used formats), large files, etc. >> >> Website: http://www.ieee-pses.org/ <http://www.ieee-pses.org/> >> Instructions: http://www.ieee-pses.org/list.html >> <http://www.ieee-pses.org/list.html> (including how to unsubscribe) >> <http://www.ieee-pses.org/list.html <http://www.ieee-pses.org/list.html>> >> List rules: http://www.ieee-pses.org/listrules.html >> <http://www.ieee-pses.org/listrules.html> >> >> For help, send mail to the list administrators: >> Scott Douglas <sdoug...@ieee.org <>> >> Mike Cantwell <mcantw...@ieee.org <>> >> >> For policy questions, send mail to: >> Jim Bacher <j.bac...@ieee.org <>> >> David Heald <dhe...@gmail.com <>> >> >> - >> ---------------------------------------------------------------- >> 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 <mailto:emc-p...@ieee.org>> >> All emc-pstc postings are archived and searchable on the web at: >> http://www.ieee-pses.org/emc-pstc.html >> <http://www.ieee-pses.org/emc-pstc.html> >> Attachments are not permitted but the IEEE PSES Online Communities site at >> http://product-compliance.oc.ieee.org/ >> <http://product-compliance.oc.ieee.org/> can be used for graphics (in >> well-used formats), large files, etc. >> Website: http://www.ieee-pses.org/ <http://www.ieee-pses.org/> >> Instructions: http://www.ieee-pses.org/list.html (including how to >> unsubscribe) <http://www.ieee-pses.org/list.html> >> List rules: http://www.ieee-pses.org/listrules.html >> <http://www.ieee-pses.org/listrules.html> >> For help, send mail to the list administrators: >> Scott Douglas <sdoug...@ieee.org <mailto:sdoug...@ieee.org>> >> Mike Cantwell <mcantw...@ieee.org <mailto:mcantw...@ieee.org>> >> For policy questions, send mail to: >> Jim Bacher <j.bac...@ieee.org <mailto:j.bac...@ieee.org>> >> David Heald <dhe...@gmail.com <mailto:dhe...@gmail.com>> > > - > ---------------------------------------------------------------- > 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 <mailto:emc-p...@ieee.org>> > > All emc-pstc postings are archived and searchable on the web at: > http://www.ieee-pses.org/emc-pstc.html > <http://www.ieee-pses.org/emc-pstc.html> > Attachments are not permitted but the IEEE PSES Online Communities site at > http://product-compliance.oc.ieee.org/ > <http://product-compliance.oc.ieee.org/> can be used for graphics (in > well-used formats), large files, etc. > > Website: http://www.ieee-pses.org/ <http://www.ieee-pses.org/> > Instructions: http://www.ieee-pses.org/list.html (including how to > unsubscribe) <http://www.ieee-pses.org/list.html> > List rules: http://www.ieee-pses.org/listrules.html > <http://www.ieee-pses.org/listrules.html> > For help, send mail to the list administrators: > Scott Douglas <sdoug...@ieee.org <mailto:sdoug...@ieee.org>> > Mike Cantwell <mcantw...@ieee.org <mailto:mcantw...@ieee.org>> > > For policy questions, send mail to: > Jim Bacher <j.bac...@ieee.org <mailto:j.bac...@ieee.org>> > David Heald <dhe...@gmail.com <mailto:dhe...@gmail.com>> > - ---------------------------------------------------------------- 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.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <sdoug...@ieee.org> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com>
