<[email protected]>, [email protected] inimitably wrote: >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.
In IEC SC77A, we have called this 'interphase' connection, which seems acceptable on both sides of the Atlantic. > >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. Yes, US usage is to call this 'single phase', and it is a mug's game to try to alter usage. But logic indicates that it is a two-phase system, 0 and 180 degrees. Provided everyone understands that, there is no point in arguing about which is 'right'. > >My apologies to the group if this is a stupid question. Its just one of >those nagging questions. No, it's not stupid; the situation is confusing and needs to be aired. -- Regards, John Woodgate, OOO - Own Opinions Only. Phone +44 (0)1268 747839 Fax +44 (0)1268 777124. http://www.jmwa.demon.co.uk Why not call a vertically- applied manulo-pedally-operated quasi-planar chernozem-penetrating and excavating implement a SPADE? ------------------------------------------- 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: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson: [email protected] Dave Heald [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.rcic.com/ click on "Virtual Conference Hall,"
