Ron, You are right, the test is 4000V RMS for one minute.
Medical device manufacturers often use a 1:1 isolation transformer to solve this problem. There are many transformer manufacturers who have catalog and/or custom isolation transformers that are designed to comply with IEC 60601-1. Their construction ensures compliance with the creepage, clearance, leakage current and electric strength requirements of IEC 60601-1. The input side can also be arranged so that they can easily be switched from 230VAC to 120VAC operation. Note that any 'AC-DC converter' or transformer which is not specifically designed for compliance with the medical standard, is very unlikely to comply with this standard. Once your product is 'front-ended' by a medical grade isolation transformer, you can then use other non-medical components in many cases. I hope this helps. Jon Griver http://www.601help.com The Medical Device Developers' Guide to IEC 60601-1 > > > I have a medical application that requires "double insulation" from the > Mains to an "applied part" according to IEC60601. IEC60601 > states that for > a reference voltage of 250v and double insulation, the test > voltage is 4000v > for 1 min. I am assuming that the voltages are RMS values. > > How does one go about meeting the 4000v test when the highest rated ac-dc > converter I can find is 3500v RMS continuous. > > Any help is appreciated. > Thanks. > > > > > Ronald Cyprowski > Vascor Inc. > 566 Alpha Drive > Pittsburgh PA 15238 > 412-963-7438 x139 > [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: > 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: > No longer online until our new server is brought online and > the old messages are imported into the new server. > ------------------------------------------- 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: No longer online until our new server is brought online and the old messages are imported into the new server.
