Hi Rick, I've heard the term "split-phase" applied to this sort of set-up.
My opinion and not that of my employer. Regards, Kaz Gawrzyjal kazimier_gawrzy...@dell.com -----Original Message----- From: rbus...@es.com [mailto:rbus...@es.com] Sent: Wednesday, May 02, 2001 3:31 PM To: emc-p...@majordomo.ieee.org Subject: AC Power Primer? I am in the process of assisting our publications group with documenting an ac power configuration. As simple as this sounds, it turns out there are varying opinions in our engineering group regarding the naming convention for input power, in particular single phase verses two phase. We all probably agree that a phase to neutral connection is single phase and devices that use all thee phases, whether they are 208V 60Hz or 400V 50Hz, are truly three phase. The discussion heats up when you are talking about a phase to phase connection on a three phase distribution (208 or 400V). Is this called single phase or two phase? It has been suggested that in the European community it is called two phase, while in the U.S. we call it single phase. I am looking for opinions or discussion on this issue. On a related note in the U.S. we have 240V 60Hz (two 120V drops) coming into our into our homes. This is provided by a transformer with a center taped winding. On the outside legs of the transformer we have 240V but between either outside leg and neutral (center tap) we have 120V. I would call this a single phase system with two additive (in phase) 120V windings. Again others have called this two phase. My apologies to the group if this is a stupid question. Its just one of those nagging questions. Rick Busche Evans & Sutherland Salt Lake City, Utah rbus...@es.com ------------------------------------------- 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: http://www.rcic.com/ click on "Virtual Conference Hall," ------------------------------------------- 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: http://www.rcic.com/ click on "Virtual Conference Hall,"
