Brian, Could you please give me ONE example of a specific requirement on a POWER SUPPLY (not on a single component) in IEC 60601-1?
Thanks, Paolo Peruzzi From: "Brian O'Connell" <[email protected]> To: <[email protected]> Sent: Thu, 22 Mar 2007 08:10:13 -0800 Subject: RE: SMPS test according to IEC 60601-1 > Although, the 3d edition of IEC 60601-1 'appears' to relax test > requirements for a component P.S. (and explicityly allows the use of > I.T. approved units), and I recommend that you avoid the temptation > to reduce these tests to that of 'transformer'. > > My employer makes many custom and off-the-shelf power supply models that > are certified to medical standards, and we encourage our customers to > repeat certain SFC tests and abnormal operating conditions in the > end-use installation. > > Also, try to get a copy of the CB Test Report. Carefully review the > tests, test conditions, and what failed as a result of the test. The > performance of the P.S. during abnormal operating conditions should > drive the conditions of acceptability for the end-use installation. > > Requirements for SFC test and abnormal operating conditions will be > dependent on the affect of the end-unit installation has on the component > power supply. And yes there are, in fact, specific requirements in > 601-1 that would apply to a component power supply. Read the > standard again. No, again. > > luck, > Brian > > > -----Original Message----- > > From: [email protected] [mailto:[email protected]]On Behalf Of Paolo > > Peruzzi > > Sent: Thursday, March 22, 2007 7:25 AM > > To: [email protected] > > Subject: SMPS test according to IEC 60601-1 > > > > Dear group, > > > > I would like to gather some opinions about safety tests on > > switch mode power > > supplies within medical devices, according to IEC 60601-1. > > My question arises because a test house technician told me he > > used to test > > power supplies as they were transformers, for what concerns > > short circuit > > and overload tests, on each dc output. > > I couldn't find such requirements for power supplies in the > > standard (I > > couldn't find any!!!), but I think it would be at least wise > > to do these > > tests. > > Do you think they should be included as single fault > > condition tests, even > > if not mentioned? > > Any other thoughts? > > > > Thanks, > > > > Paolo Peruzzi > > Regulatory Medical R&D > > El.En. S.p.A. > > Via Baldanzese, 17 > > 50041 Calenzano (FI) > > Italy > > - > ---------------------------------------------------------------- > This message is from the IEEE Product Safety Engineering Society > emc-pstc discussion list. Website: http://www.ieee-pses.org/ > > To post a message to the list, send your e-mail to [email protected] > > Instructions: http://listserv.ieee.org/request/user-guide.html > > List rules: http://www.ieee-pses.org/listrules.html > > For help, send mail to the list administrators: > > Scott Douglas [email protected] > Mike Cantwell [email protected] > > For policy questions, send mail to: > > Jim Bacher: [email protected] > David Heald: [email protected] > > All emc-pstc postings are archived and searchable on the web at: > > http://www.ieeecommunities.org/emc-pstc - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to [email protected] Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas [email protected] Mike Cantwell [email protected] For policy questions, send mail to: Jim Bacher: [email protected] David Heald: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email ______________________________________________________________________
