My impression is that potting or coating compounds are ofte a mixture of bee's wax and rosin. Maybe of different waxes. To fill the voids it may be necessary to boil the transformer (or whatever) in it.
??? BTW, one of the greatest industrial secrets was the formulation of the wax blanks used for cutting records.
toggle quoted message
Show quoted text
On 3/9/2021 10:54 AM, Roy Thistle wrote:
On Mon, Mar 8, 2021 at 10:08 AM, Jean-Paul wrote:
The root problem is that high voltage and high frequency will produce ozone
and eventually break down any voids, bubbles or cracks that allow the air
entrapped or outside the part to ionize.
Hi JP:
Yes. Ozone is very reactive and corrosive.
I think the idea of using "beeswax" is that... being a "wax" that melts at low temperatures... and perhaps having some properties that absorb ozone (and/or its reaction products that promote arcing) ... then as local arcing commences, and the transformer heats up (which it will)... the "beeswax" will melt there and fill in the void, extinguish the arc, and absorb products produced by the arcing that would otherwise promote arcing.
If we knew more about what "beeswax" was ... and it is not one chemical compound, but a homogeneous mixture of many unique chemical compounds. (The melting point of beeswax is given as a range... a sign it is not a pure... and perhaps not a unique chemical compound.) There are many "waxy" substances called beeswax, and they are not the same things.
Knowing what makes "beeswax" beeswax (as people call just similar things beeswax)... might help us to understand what it does (or doesn't do), for potting/insulating hi-voltage transformers.
Best regards.
--
Richard Knoppow
dickburk@...
WB6KBL
