A "single-phase, split-voltage" or "single-phase, 3-wire service " are likely better names for our peculiar 120/240V a.c. system here. _______________________________________________________________________________
Ralph McDiarmid | Schneider Electric | Solar Business | CANADA | Regulatory Compliance Engineering From: "Kunde, Brian" <brian_ku...@lecotc.com> To: EMC-PSTC@LISTSERV.IEEE.ORG Date: 06/05/2012 01:39 PM Subject: Re: [PSES] Follow on to EN 61000-4-5 Surge Question, How is Voltage configur ed? Since this is mainly for Europe, we perform the test at 230VAC 50hz with a grounded neutral which I believe is the most common power system in most areas, but not all. I believe you are correct; AC power in Europe is generally derived from 3-phase where 230VAC is the voltage from Line to Neutral. In most locations the neutral is at earth ground potential but not everywhere. In some areas the neutral is floating (so I have been told). In North America, 220VAC single phase center tap systems (sometimes incorrectly called two phase or split phase) is most common in residential and commercial locations, but not commonly found in industrial locations. For instance, our EMC lab is in an industrial area and we do not have split phase. Our 115VAC is derived from 208 with a grounded neutral. So when we test residential 220V appliances we have to use 208 which is technically not correct, but as close as we can get. Our 208 runs a bit high and runs around 215V. Hope this was helpful. The Other Brian From: emc-p...@ieee.org [mailto:emc-p...@ieee.org] On Behalf Of Larry Stillings Sent: Tuesday, June 05, 2012 11:43 AM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Follow on to EN 61000-4-5 Surge Question, How is Voltage configur ed? Firstly, thank you for those whom responded to my EN 61000-4-5 lightning surge question last week My follow on question, is how should the 230 VAC, 50 Hz Source be configured for mains power. Is using 230 VAC consisting of 115 volts from Line to ground, and 115 volts from neutral (l2) to ground acceptable, or should the AC source be configured to apply 230 VAC on Line to Ground, and Neutral or L2 configured to be around 0 volts. Here in the USA we have two phases, although we call it single phase which brings in 120 VAC on Line 1 and 120 VAC on Line 2 to provide 240 VAC, 60 Hz, unless of course you have a building where one of the three phases is tapped, but then my understanding is that is what is called 208 VAC, 60 Hz. However, I mainly interested in how power is configured in Europe. From what I read it is derived from either 415 3-Phase which gives 240 Volts on line, or 380 3-Phase which gives 220 Volts on line, and 230 Volts on line was a compromise between the two ? Larry K. Stillings Compliance Worldwide, Inc. Test Locally, Sell Globally! FCC - Wireless - Telecom - CE Marking 357 Main Street Sandown, NH 03873 (603) 887 3903 Fax 887-6445 www.complianceworldwide.com Privileged/Confidential Information may be contained in this message. If you are not the addressee indicated in this message (or responsible for delivery of the message to such person), you may not copy or deliver this message to anyone. In such case, you should destroy this message and kindly notify the sender by reply email. Please advise immediately if you or your employer do not consent to Internet email for messages of this kind. Opinions, conclusions and other information in this message that do not relate to the official business of my firm shall be understood as neither given nor endorsed by it. - ---------------------------------------------------------------- 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://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...@radiusnorth.net> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher <j.bac...@ieee.org> David Heald <dhe...@gmail.com> LECO Corporation Notice: This communication may contain confidential information intended for the named recipient(s) only. If you received this by mistake, please destroy it and notify us of the error. Thank you. ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. ______________________________________________________________________ - ---------------------------------------------------------------- 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://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...@radiusnorth.net> 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> 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://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...@radiusnorth.net> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com>
