Hi,
Does anyone know of any references on how insulation in a small coil (EFD10
transformer) should be specified?
We have a small coil design where we use #36 and #32 wire. The #36 wire I
had on my shelf had insulation that failed at about 400V. I test by taping a
short length of wire directly on copper clad board. I purchased some Quad
Build that had a 4650V rating and it passes when I test to 6000V. Likewise a
single layer of polyester transformer tape also withstands 6000V.
The Question:
With the above wire ratings and measurements what is the appropriate
rating for the final core for 60 second maximum voltage? Assume 2 coils with
a single layer of tape between them.
Also: I have been impregnating the coils with a 4000V / mil thermosetting
varnish using a small vacuum fixture.
Thanks,
Bob K.
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