Hello, I have a unit consist of metal enclosure and open frame AC/DC power supply, approved to UL/IEC 950. P.S includes PRI/SEC Transformer marked B/130 (Class B/130 deg.C). During Heating Test, transformer winding temperature exceeds class A limits (65 deg.C max. temperature rise). There is no mention about transformer class in UL report (class of insulation system) or in TUV certificate (but the power supply manufacture says it is class B).
What class should I consider this transformer to be? Thanks Zohar Zosmanovich Compliance Engineer RadWin (The Wireless Alternative) Ltd. E-mail: [email protected] RADWIN Ltd. 34 Habarzel St., Tel-Aviv 69710, Israel. Tel.: 972-3-7666735 Fax.: 972-3-7657535 ------------------------------------------- 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: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson: [email protected] Dave Heald [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.rcic.com/ click on "Virtual Conference Hall,"
