Hello Arthur, As Neil noted, it can be difficult to use triple insulated wire in an EN 60335-1 design. Depending on the design and use of your product, you may be able to design and test your power supply to EN 60950-1. If you get NRTL approval of the power supply to EN 60950-1, you may be able to use it with the triple insulated wire in the EN 60335-1 product. Discuss this idea with your NRTL to see if it is acceptable.
I have successfully used this approach on an air conditioner tested to EN 60335-1 and EN 60335-2-40. However, the air conditioner is designed for use in computer rooms and with an ITE environment. VDE accepted the EN 60950-1 power supply, but I never asked if it was accepted as a general rule or because of the intended environment of the final product. Best regards, Ted Eckert American Power Conversion 801 Corporate Centre St. Charles, MO 63304-8685 [email protected] The items contained in this e-mail reflect the personal opinions of the writer and are only provided for the assistance of the reader. The writer is not speaking in an official capacity for APC nor representing APC's official position on any matter. Arthur Michael <amichael@safetyl ink.com> To Sent by: [email protected] [email protected] cc Subject 02/14/2006 08:49 Help Needed Sourcing Wire Meeting AM EN 61558-1 (2005) Annex K Hello All, I have run into a wall and seek your collective guidance. Background: EN 60335-1 references EN 61558-1 (Transformers), which references EN 61558-2-17 (SMPS Transformers) I'm trying to source triple-insulated wire that meets Annex K of EN 61558-1 (2005). Annex K is titled, Insulated winding wires for use as multiple layer insulation". Annex K of EN-61558-1 is similar to Annex U of EN 60950-1 but the requirements are more stringent than specified in EN 61558-1. For those unfamiliar with this type of wire, it is used to reduce the mandated creepage and clearances in Switch Mode Power Supply transformers and yields a much smaller transformer for a given rating. That's its claim to fame. To my knowledge, tri-insulated wire is manufactured by: Furukawa Rubadue * Virgina Insulated Products * * Requires stripping, which the transformer manufacturer is not fond of - they seek wire meeting this requirement - which does not need stripping of insulation. I cannot find evidence that any of them meet the Annex K requirements of EN 61558-1 There must be someone out in this World who manufactures such wire - but I can't find them. Helppppppppppppppppp me - please. Vendors - please contact me directly. ThanX and regards, Art Michael A.E. Michael, Dir. of Engineering PSI 166 Congdon St. East Middletown CT 06457-2107 U.S.A. Phone : (860) 344-1651 Fax : (860) 346-9066 Email : [email protected] Website: http://www.safetylink.com - 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 - 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
