Hello Patrick, In most of the developed world hospitals have their own (non-public) low-voltage distribution system.
They have their own distribution transformer(s) and parts of the system may be floating (e.g. European operating theatres) while other parts have emergency back-up systems (certain OR or critical care outlets). Hospitals, just like large office buildings are rarely directly connected to the public low-voltage distribution system. Their electricity is normally provided by a MV transformer. This is not necessary true in lesser developed countries. Best regards, Dave Osborn PM-CMS Philips Medical Systems +1 978 659 3178 fax +1 978 685 5624 [email protected] [email protected] Sent by: To: EMC-PSTC <[email protected]> owner-emc-pstc@majordo cc: (bcc: Dave Osborn/ANR/MS/PHILIPS) mo.ieee.org Subject: Medical equipment and EN61000-3-2 Classification: 09/18/2002 03:55 PM Please respond to plawler The scope of EN61000-3-2:2001 says that the standard deals with harmonic currents injected into the public low-voltage distribution system. I can see that residences and offices are connected to the public system. However, I don't know about distribution to hospitals. Are their power requirements specialized enough that their electricity is provided by a MV transformer? This would exempt hospital-only medical products from the harmonic current requirements. Or are their different levels of hospitals, some fed by LV transformers, some fed by MV transformers? ---- Patrick Lawler [email protected] ------------------------------------------- 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: Ron Pickard: [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://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list" ------------------------------------------- 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: Ron Pickard: [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://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list"
