Jim, The table is not wrong. The working voltages in that column are non-hazardous, so basic, supplementary and reinforced insulation do not apply. The application for that column would be the use of 5.3.4 (b) for evaluating SELV or ELV functional insulation.
Regards, Don Gies, N.C.E Senior Product Compliance Engineer Lucent Technologies - Global Product Compliance Laboratory Holmdel, NJ 07733 USA From: Jim Eichner [mailto:jim.eich...@xantrex.com] Sent: Tuesday, June 13, 2006 6:57 PM To: EMC-PSTC@listserv.ieee.org Subject: EN60950-1 Table 5B error? Referring to the 2nd last column ("between independent secondary circuits", working voltage U< 42.4Vpk), why would Functional insulation require a 500V test but Basic/Supplemental/Reinforced have no test? Is this table wrong? For components (optocoupler, SMT transformer) crossing a Functional isolation boundary between an SELV circuit and another SELV circuit (an ethernet circuit in this case), do I need to specify electric strength requirements? Thanks, Jim Eichner, P.Eng. Compliance Engineering Manager Xantrex Technology Inc. e-mail: jim.eich...@xantrex.com web: www.xantrex.com Any opinions expressed are those of my invisible friend. Confidentiality Notice: This email message, including any attachments, is for the sole use of the intended recipient(s) and may contain confidential and privileged information. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies of the original message. - 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 emc-p...@ieee.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 emcp...@ptcnh.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: emc-p...@daveheald.com 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 emc-p...@ieee.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 emcp...@ptcnh.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: emc-p...@daveheald.com All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
