Regarding my query on medical equipment transformer construction
(EN-60601-1, clause 57.9.4(e)), can I be a bit more specific.

- How were insulation thickness requirements decided, and why is the
thickness requirement lower if insulation is 2-layer rather than
single-layer ?.
- Why are single-layer and 2-layer insulation requirements defined in terms
of thickness, yet 3-layer insulaton requirements defined in terms of
dielectric strength ?.

Thanks

Ged Dean


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