Separation distance between primary and secondary of section wound LLC transformer?

[treez]

In the attached diagram of a section wound LLC transformer, what does the width of the “separator” have to be between the primary and secondary coils?
(the LLC converter is the isolation stage of a 230VAC main converter)

 

[Velkarn]

i see 3mm... maybe i do not completely understand the question...

 

[FlapJack]

It would have to be the same as the regulation for margins 2mm or 3mm.

 

[treez]

thanks, if i put a layer of tape stuck across the top of that barrier tape, then that effectively closes off the route between the primary and secondary coils, and then the actual separation is the creepage along that tape surface , which would be well more than the regulatory 6mm?