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Re: Slightly OT, the dielectric breakdown of mineral oil and transformer oils

Original poster: "Jim Lux" <jimlux@xxxxxxxxxxxxx>


----- Original Message -----
From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Sunday, March 13, 2005 9:28 PM
Subject: Slightly OT, the dielectric breakdown of mineral oil and
transformer oils


> Original poster: "Mercurus2000" <mercurus2000@xxxxxxx>
>
> Does anyone know just how much better transformer oil is at withstanding
> high voltage compared to mineral oil?

transformer IS mineral oil
It's dry, clean mineral oil.

The stuff in the store isn't necessarily dry, nor is it free of particulates
(since neither of those are requirements for USP mineral oil).  Dissolved
water and particles greatly reduce the breakdown strength.

And what about fragrance added to the
> oil like they normally do in the stores, does the perfume added make it a
> risk for quickened breakdown?

The perfume probably doesn't change the dielectric properties very much,
depending on what it is.
>
>
I would imagine that real transformer oil is cheaper, too.