Pierre, According to the text of IEC 60601-1, the test should be performed with AC voltage, and does not give the option of performing the test with DC voltage, as is the case in other standards.
The standard allows some components to be disconnected during the test, but primary-earth capacitors are not mentioned. Nevertheless, I believe that it may be possible to use engineering judgment and test using DC voltage, giving the justification in the test report. I give as an example the data sheet at: http://www.ipdpower.com/pdfs/SRP-25.pdf This power supply range has UL approval to UL2601-1 and TUV approval to EN 60601-1. In the "Application Information" in the data sheet, the following appears: "This power supply has been safety approved and final tested using a DC dielectric strength test. Please consult factory before performing AC dielectric strength test." I do not know what justification UL and TUV used, but they seem to have found a way to get around the problem. Regards, Jon Griver http://www.601help.com The Medical Device Designer's Guide to IEC 60601-1 > > Hello, > > > > The 60601-1 standard require the dielectric test to be done at 50 or 60 Hz > only (except when you have a DC power supply). > > Do you know if it's possible to perform this test in DC mode (with an AC > power supply on the EUT), mainly to avoid problem with capacitors on > primary/earth isolation ? > > > > Many thanks, > > Pierre Selva > This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ieee-pses.org/ 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://www.ieeecommunities.org/emc-pstc
