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Registered Member #2431
Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639
yes but i dont want hydrocarbon oil, and for our purposes i find little difference in oils so long as they dont have a green clorophyll color left in them. Dont use corn oil. it turns to garbage in a few weeks.
Many HV companies are moving to soy bean oil for 20 gal to 300 gal tank transformers.
20 liters is quite a large volume what do you use it for ?
Thank you for pointing me to Diala johnf. I found a local supplier. It's cheeper than many food oils and is specifically designed for HV applications and has good aging properties.
Registered Member #4367
Joined: Thu Jan 26 2012, 07:54PM
Location: NE Hampshire UK
Posts: 16
For the vacuum pump, a cheap experiment would be to connect two old scrap refrigerator compressors in sequence. This can get you quite a low absolute pressure at minimum cost, before you commit $zillions to a professional unit. (We use them on my local miniature railway to provide vacuum to operate switches and points remotely.)
Registered Member #2431
Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639
it was 59$ for the pump, $40 for the plumbing, with zero risk of leaks from brazing, and contamination from refrigerant im happy. besides i make a lot of carbon fiber.
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Preparing High Voltage Oil.
