Dear all, We have designs for ferrite transformers need to be compliant to UL1950. However, some concepts still confused me,
(1) How do UL define the creepage distance? (2) We use marginal tapes for the primary winding and the interwinding also. Then do we need to add marginal tapes for the secondary winding? (3) What is triple insulated wire? What are the critical electrical properties for this wire? (4) If triple insulated wires are used, what is the advantages? (5) Phelps Dodge has got a wire called TZQS wires (wire with quantum shield), is it a triple insulated wires. Many thanks Robin Chan ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to ed.pr...@cubic.com, j...@gwmail.monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).