The transformer oil I removed form a large 150kVA or so big transformer salvaged from a job site is yellowish but clear, and it is real tranny oil. It does burn for sure. I have four 5 gallon buckets of it, sitting 2 over 2 in my garage. I apparently pushed my dust collector into one and the corner pierced an upper bucket causing a slow seep.
I happened to notice before it got too big. Luckily I had a spare orange Home Repot 'Homer' bucket and poured it into a new one. I wiped the old one out with a paper towel and just for fun lit the corner. It burns very well! So it may contain trace PCBs but I have not tested it yet. What is the cheapest way to test for this?
Nick A
NO signature here to not offend wussies.
> Date: Tue, 11 Mar 2014 04:53:38 -0700
> From: drieben@xxxxxxx
> To: tesla@xxxxxxxxxx
> Subject: Re: [TCML] rolled cap oil color
>
> Hi David,
>
> I personally don't think that I've ever seen dielectric oil (Shell Diala
> or something similar) completely colorless, even when brand new
> in the shipping container. It always has a yellowish hue to it, from
> my personal experience. Now the mineral oil that you purchase
> in the drug store or in larger quantities at the farm coop is in fact
> clear and colorless and I'm assuming that is what was originally
> used in the construction of your homemade units. I suppose
> leaching of the solid dielectric medium into the oil over time could
> eventually darken it. Also, these TCBOR caps that you mention
> are 20 years or more old now, too so that would allow ample
> time for the gradual "leaching" to occur, if that is what's going
> on. I'm assuming that your oil is only colored, but still clear and
> not "cloudy"? IMHO, cloudy would be "bad".
>
> My $.02,
> Another David (Rieben)
>
> From: david baehr <dfb25@xxxxxxxxxxx>
> To: "tesla@xxxxxxxxxx" <tesla@xxxxxxxxxx>
> Sent: Monday, March 10, 2014 8:56 PM
> Subject: [TCML] rolled cap oil color
>
>
> I have three old ,early 1990's , home rolled T.C.B.O.R. caps with pole trans oil in them. The oil has been slowly turning from clear to a yellow color . What could be causing this ? They still seem to function ok. Thanks, Dave B
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