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Re: oil dielectric
Original poster: "davep by way of Terry Fritz <twftesla-at-qwest-dot-net>" <davep-at-quik-dot-com>
>>Paul: before oil burns you must reach the flash point temprature.
>>If your oil is cool enough to handle you are well below this temp.
> Suppose the coil is running.
> Suppose the coil arcs over, in an unexpected way.
> Suppose the arc hits the oil.
> Suppose (since its an insulator) the oil gets a breakdown
> UNDER it. Now the arc is in the oil.
> This is why oils became unpopular in HV gear:
> When something went wrong, the arc lit the oil.)
> I can understand the very real events that can occur with oil.
> If the dielectric of oil breaks down as you indicate, the
> results would be catastrophic. When the dielectric of water
> breaks down, particles of water are thrown off with such force
> they can penetrate metal sheeting.
I'd be interested in a documented case.
Decomposition of water leaves gaseous products, which
will drift away, the remaining water is
> Magnetic repulsion which is used to lift trains,
magnetic forces operate all 'electric' motors.
Other than CRTs, and smoke eaters, 'electric forces'
are essentially unused. Mag-Lev exists only in an
experimental installation or two. Most trains run
on steel springs (or oil/air).
> cannot compare to electric repulsion.
It compares quite exactly. It is much more widely used.
>>>I am sure a thermocouple could be added to cut off the power if
>>>the oil starts to heat.
>> Heating by submerged arc, or arc to spilt oil is way
>> faster than a thermocouple.
> Agreed, the arc would be near light speeds.
Arcs propagate a LOT slower than light. (I'd have
to dig for an exact number). Fast, slower than light.
> I saw a most interesting program about a woman who
> was struck by lighting and completely healed of the viral
> disease she had. I think it was MS, and the doctors
> said she would never walk again. She was running water
> for her bath when her metal leg brace came in contact with the
> iron tub. She was by eye witness accounts, blown across the
> room from the lightning bolt and found several feet from her wheel
... and there are a huge number of lightning survivors
with well documented, long term BAD effects, notably
neurological damage and symptoms...