Aahh, so the statement, "Conformity is checked by inspection, and by the a.c. test of 6.8.3.1 with a duration of at least 1 min, or for MAINS CIRCUITS stressed only by d.c., the 1 min d.c. test of 6.8.3.2, using the applicable voltage from Table 5."
is saying that for AC Mains you use AC voltage for hipot, and DC Mains you use DC voltage for hipot. Maybe this is why the CSDS proposal would allow "all hipot tests should be permitted to be performed with either ac or dc". Interesting. Thanks. The Other Brian -----Original Message----- From: Richard Nute [mailto:ri...@ieee.org] Sent: Tuesday, June 24, 2014 2:40 PM To: Kunde, Brian; EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] UL61010-1 CSDS Proposal for 6.5.2.4 On 6/24/2014 6:55 AM, Kunde, Brian wrote: > > What does "stressed only by d.c." mean? How are Mains Circuits stressed by > d.c.? Hi Other Brian: One must distinguish between ac mains and dc mains. dc mains are not subject to the same overvoltages as are ac mains. Therefore, dc mains are not as "stressed" as ac mains. (ac mains don't have dc, so ac mains cannot be stressed by dc.) This concept is not widely recognized by those writing requirements. Best regards, Rich ________________________________ 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 <emc-p...@ieee.org> 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://www.ieee-pses.org/list.html (including how to unsubscribe) List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <emcp...@radiusnorth.net> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com>
