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It would be interesting to make an arc over detector which would shut
down the TC at the first current of an arc to the secondary. Not
obvious immediately how one could do that. --- Carl Well, little
current would flow in the ground of the secondary.
On 7/11/2018 2:27 PM, jimlux wrote:
On 7/11/18 11:58 AM, David Speck wrote:
I would think that "EM transparent" and "electrically conductive" are
mutually exclusive in the frequency ranges we are dealing with.
I've never tried it myself, but I suspect that any electrically
conductive material would act like a shorted torn, no matter whether
it is a copper or aluminum ring, or a piece of wire screen.
I have seen several spectacular museum photos of electrical
discharges passing around an insulating glass plate.
I suspect that a simple circular piece of 1/4 to 1/2" Lexan of
sufficient diameter would divert a direct strike, but the diversion
might be TOWARD the secondary, which would not be good.
This discussion started out with "how do we avoid a secondary winding
strike causing damage"
Probably ANY material in front of the wire, if sufficiently thick,
will disperse the energy density enough to prevent damage. Although,
sparks will make nice pinholes (in skin or plastic or whatever)
If it spreads around a plate, that's probably ok.
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