Hi Tyler,If you've removed the dent and substantially increased the clearance distance between the affected winding and the case, the mineral oil itself should provide sufficient insulation.
However, it you'd like to provide additional insurance to make the fix bulletproof, you could slip in a curled piece of 1/16" - 3/32" thick flexible natural LDPE sheet against the metal case opposite the location of the fault. You can simply curl a 6" wide strip around the inside of your transformer case so that it snugly lines the interior of the metal case. LDPE is compatible with mineral oil over the long haul, so it should last for the lifetime of the transformer. Old time coilers will remember times when HV Tesla Coil capacitors were constructed using LDPE sheet under oil as the dielectric material.
Something like the following material: https://www.usplastic.com/catalog/item.aspx?itemid=23655&catid=705 Good luck, Bert Tyler LaVite wrote:
Does anyone know what type of tape that is used on a transformer core to hold the nonexistent paper on the core? The tape they use to tape the seams? Sent from my iPhoneOn Jan 4, 2019, at 7:07 PM, David Speck <Dave@xxxxxxxxxxxxxxxx> wrote: Tyler, Good to hear that the fix looks to be relatively simple. I would think that you will have to re-center the core inside the tank. At the voltages involved, a few layers of varnish are not going to provide adequate insulation. Distance from the can and lots of oil are what you will need to prevent further breakdown. DaveOn 1/4/2019 7:54 PM, Tyler LaVite wrote: Guess what guys! I pulled apart my transformer tonight and found a tiny burn mark on the outer wrap of HV side. I opened the paper it was right next to the end and there is one tiny little dot on one wrap of wire. What I found out happened was when this transformer got its bushing hit by a fork lift it shifted the core and it was sitting on the tank and it burned a small dot through the paper and was grounding onto the can. A good couple of coats of electrical varnish should fix it right up... man I’m so happy good end to a Friday!_______________________________________________ Tesla mailing list Tesla@xxxxxxxxxxxxxxxxxx https://www.pupman.com/mailman/listinfo/tesla_______________________________________________ Tesla mailing list Tesla@xxxxxxxxxxxxxxxxxx https://www.pupman.com/mailman/listinfo/tesla
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