Hi, The voltages in IEC 60601-1 are rms. See paragraph 20.4.b.
You need a converter that is certified for medical. Not only is the dielectric higher, but the spacing (8mm CD, 5mm AC) are higher. Most power supplies designed for IEC 60950 will not pass. Ned Devine Program Manager III Entela, Inc. 3033 Madison Ave. SE Grand Rapids, MI 49548 616 248 9671 Phone 616 574 9752 Fax ndev...@entela.com e-mail -----Original Message----- From: John Woodgate [mailto:j...@jmwa.demon.co.uk] Sent: Wednesday, August 29, 2001 3:18 PM To: emc-p...@majordomo.ieee.org Subject: Re: Medical application-Isolation voltage I read in !emc-pstc that Ron <r...@vascor.com> wrote (in <00d501c1309e$f4 81d540$21df7...@vascor.com>) about 'Medical application-Isolation voltage', on Wed, 29 Aug 2001: > >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. Yes, unless another measure is specified. Look carefully: it may be a peak value. > >How does one go about meeting the 4000v test when the highest rated ac-dc >converter I can find is 3500v RMS continuous. > Complain to the converter manufacturers that you can't buy their product because it doesn't meet the standard. It's their problem, not yours! -- Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk Eat mink and be dreary! ------------------------------------------- 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: 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: 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: No longer online until our new server is brought online and the old messages are imported into the new server.
