Re: Mylar sheeting

• To: tesla-at-pupman-dot-com
• Subject: Re: Mylar sheeting
• From: "Roderick Maxwell" <tank-at-magnolia-dot-net> (by way of Terry Fritz <twf-at-verinet-dot-com>)
• Date: Mon, 19 Apr 1999 19:04:55 -0600
• Approved: twf-at-verinet-dot-com

>
>  Short term dielectric strength for 1 mil  D.C. 25 deg. C. 14 kV, for 60
HZ,
>7500 volts, and at 150 deg. C 5000 volts.  Dissipation factor is .0025 -at-
>60HZ.  Corona resistance for 3 mil. is 30 hours at 3000 volt 60 HZ 25 deg.
C.
> Melting point for type A is 250 deg. C. Service temp. 150 deg. C.  Does
>deteriorate over time slightly in hydrocarbon based oil.
>
>  Mylar is getting hard to find at our local Regal Plastic outlet, I used
to
>buy 20" x 50" x 0.007" sheets for $2.00.  They replaced it with lexan
>(polycarbonate) film.
>
>Hope this helps.
>
>Kevin E.
>
>

      Thank you for the information. I plan to use one layer of mylar
sandwiched between two layers of kraft paper. The mylar will be type D. In
the catalog it states it is unaffected by oils, greases, and most aromatics.
    The transformer will be submerged in an oil tank after winding. The oil
soaked kraft paper should result in additional insulative protection.



Frankensteins Helper

Max

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