I agree with Rich. Appendix D of your UL report or procedure has
Exceptions to the standard dielectric and ground continuity tests done by
the manufacturer. In my case I have 4 products which do not require either
of these tests. I'd take a quick glance in your procedure.
Gary-----Original Message----- From: Rich Nute [mailto:ri...@sdd.hp.com] Sent: Monday, November 12, 2001 4:34 PM To: chris.maxw...@nettest.com Cc: emc-p...@majordomo.ieee.org Subject: Re: HiPot testing of DC mains powered products Hi Chris: I wonder why you need to hi-pot test a SELV-powered product? (I presume your external 48-volt dc source is SELV.) We make products intended for connection to an external dc source (SELV). We have never been required to perform a hi-pot test on such products. The production-line hi-pot is a test that tests the insulation between the two input leads (in parallel) and the chassis (or accessible metal). The insulation provides protection against electric shock. Since no electric shock is possible from 48 V dc (according to the standards), then there is no requirement for the insulation to withstand the transient overvoltages (if any) on the dc mains. Indeed, if the insulation were to fail, there would be no electric shock. Best regards, Rich ------------------------------------------- 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.
