In message <[email protected]>, dated Fri, 17 Feb 2006, Peter Tarver <[email protected]> writes >I did the original UL evaluation on the Furukawa TEX and TEX-E wires. I >just checked their web site > >http://www.furukawa.co.jp/makisen/eng/safety/standard.htm#TEXE > >and see that they make no claims regarding 61558-1. The wire was >originally intended only for 950-type power supplies and that appears >to remain their primary market.
There is a potential problem here. I would advise the enquirer to go to: http://domino.iec.ch/webstore/webstore.nsf/artnum/034744 Then click on 'Preview', which allows you to read the first 31 pages of IEC 61558-1. Episode 1: the bad news is that it is a Group Safety Publication, so IEC 60950 would be expected, in future, to refer to it for such things as wire specifications. Episode 2: the better news is that this Part 1 is NOT meant to be applied to specific products; it is meant to be used in conjunction with a section of Part 2, which specifies the tests and requirements in Part 1 that are applicable to a specific type of transformer. Episode 3 is that the section of Part 2 applicable to switch-mode power supply transformers is section 2-16, which has not yet been published. Episode 4 is that it MIGHT be agreed not to amend IEC 60950 to call up IEC 61558-1 and -2-16, but to defer that for the new 'multimedia' standard that will replace IEC 60950 and IEC 60065. If, as reported here, there is a problem with making SMPS transformers using wire conforming to Annex K of IEC 61558-1, the people affected, and those directly concerned in IEC TC96 and IEC TC108, had better talk to each other. Maybe section 2-16 will not call up Annex K of Part 1. Quien sabe? -- OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk 2006 is YMMVI- Your mileage may vary immoderately. John Woodgate - 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
