Hello Group My understanding of insulation systems is:
Basic insulation: insulation providing "one layer" of protection Supplementary insulation: additional insulation, to basic insulation, providing double insulation Double insulation: basic plus supplementary insulation Reinforced insulation: single insulation providing the equivalent of double insulation Now, I have some SMPS winding wire insulation specs in front of me, from the UL Card, they give the types as: Cat. No. UTW(B) for basic insulation, rated 130° C (Class B), 300 Volts, 18-31 AWG. Cat. No. UTW(F) for supplemental insulation, rated 155°C (Class F), 600 Volts, 18-38 AWG . Cat. No. TRW(F) for Reinforced Insulation, rated 155°C (Class F), 600 Volts, 18-31 AWG. What is supplemental insulation? Is it the same as supplementary insulation and if so, how can a winding wire be rated as providing supplementary insulation? Thanks for any input, Regards Chris Colgan This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ieee-pses.org/ To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: [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.ieeecommunities.org/emc-pstc
