Hi Rich Thanks for the reply, just what I needed to know (btw it's the reinforced type I need).
Regards Chris From: Rich Nute [mailto:[email protected]] Sent: 12 January 2004 18:00 To: Colgan, Christopher [Harman Pro Group UK] Cc: [email protected] Subject: Re: Transformer wire insulation Hi Chris: > 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? supplemental = supplementary Merriam Webster's Collegiate Dictionary, 10th: supplemental (adjective): serving to supplement. supplementary (adjective): added or serving as a supplement. For thin insulations such as coatings... Basic insulation requirements are simply that of electric strength. This can be accomplished with one "layer" of insulation on the wire. Supplemental (supplementary) insulation requirements are electric strength plus some degree of mechanical robustness. This is accomplished with two "layers" of insulation on the wire. This probably derives from the 0.4 mm minimum thickness for supplemental insulation; instead of 0.4 mm thickness, two "layers" are deemed equivalent. Reinforced insulation is a combination of basic and supplementary insulations. This is accomplished with three "layers" of insulation on the wire. Read "layers" as independent coatings or very thin sheet wrapped about the wire, or equivalent construction. Best regards, Rich 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 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
