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
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