Re: [TCML] Diesel for transformer oil?

[G Hunter <dogbrain_39560@xxxxxxxxx>]

I used 10 gallons of farm tractor hydraulic fluid to fill up my British pole pig.  The fluid has been in there since the 1990's.  So far, so good.  This is the cheap, generic stuff sold in 5 gallon buckets at Sam's Club.  I'm sure they still sell it.

Greg


--- On Wed, 11/5/08, David Rieben <drieben@xxxxxxxxxxx> wrote:

> From: David Rieben <drieben@xxxxxxxxxxx>
> Subject: [TCML] Diesel for transformer oil?
> To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
> Date: Wednesday, November 5, 2008, 2:52 PM
> Hi all,
> 
> I have recently removed some bad oil from my
> x-ray transformer due to some internal arcing 
> that had been occuring. The oil was nearly 
> black with suspended carbon paritcles (not
> good). The tank holds a whopping 25 gallons
> and a quick call to my local oil jobber revealed
> that the recent lower spot market cost oil crude
> had obviously NOT yet trickeld down to the 
> transformer oil customer, as the price quote 
> for a Shell DialaX transformer oil was $10.01/gal!
> Partial fill-up is not an option for x-ray transfor-
> mers as they run a very high voltage/volume 
> ratio that is entirely dependant upon proper oil
> filling to be functional at anything near their 
> rated voltage. This got me to thinking about
> stories of scrap metal dealers running their 
> diesle trucks on the oil of reclaimed transformers
> and wondering if diesel fuel could also possi-
> bly be used for a suitable dielectric oil for 
> filling transformers. Diesel has an oily consis-
> tancy and can now be purchased for less than
> $4/gallon. I know properly rated transformer oil
> is the BEST but I just can't see dropping >$250
> to repair a transformer that I only paid $50 for
> when I bought it! How much does mineral oil
> laxitive at the farm coops generally go for per
> gallon? Any suggestions?
> 
> David Rieben
> 
> PS - Too bad that I couldn't have filtered the 
> contaminated oil to reuse.
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