David, The rating verses test voltage falls under the chicken and egg scenario sometimes especially for power supplies. If a product is rated 240V some testing is required at +10% which is 264V. Some power supply companies rate their products up to 264V so their customers know it will handle it, but then again, some safety labs will insist on performing some tests at 264V +10% more. You cannot win.
We perform some tests on our products at 264Vac. We use a double decker PowerStat Autotransformer from Superior Electronics rated 70amps max (35 amps per deck). I'm sure there are many others on the market. We used to use our programmable power supply but the surge test kept taking out the surge suppressor varistors on the front end. The repair bill got a bit large before we realized what was happening. The Other Brian From: [email protected] [mailto:[email protected]] On Behalf Of David Sent: Monday, December 03, 2012 11:21 AM To: [email protected] Subject: IEC 60601-1-2 autoranging supplies All, IEC 60601-1-2 requires surge, burst, and dropouts be done at the maximum and minimum rated voltages for autoranging supplies. We typically test at 90 Vac and 240 Vac. Many supplies I see now are rated up to 264 Vac though. Is anyone testing at 264V? Are there variacs out there to bump the input voltage, since our generator can't go much above 240? Thanks, David - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]<mailto:[email protected]>> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ 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]<mailto:[email protected]>> Mike Cantwell <[email protected]<mailto:[email protected]>> For policy questions, send mail to: Jim Bacher <[email protected]<mailto:[email protected]>> David Heald <[email protected]<mailto:[email protected]>> ________________________________ LECO Corporation Notice: This communication may contain confidential information intended for the named recipient(s) only. If you received this by mistake, please destroy it and notify us of the error. Thank you. - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ 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]>
