Hi,
I'm designing a flyback transformer of a 25 W power supply.
The power supply will be UL tested in Europe. The norm that will be followed is the UL 60950.
The UL safety engineer told that the Hi-Pot test will be carried out after leaving the power supply in the humid room for 12 hours at 93% of humidity.
He suggested me to add sleeving to the transformer.
My question is: on which leads am I supposed to add sleeving? Primary? Secondary? Auxiliary?
Thanks, Enrico Migliore