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Ive seen the inside of pole pigs with aluminum primary windings, its
more like a wide flat strap instead of wire.

As to solid-state pigs... well how do you think they do big HVDC power
conversion?  Giant solid state inverters is how...  Of course its
still at power frequency (50/60hz) so the transformers arent "solid
state" like the HF NSTs out there.  You could make pole pigs a tiny
fraction of their existing size if we could convert to a 40khz grid or
something ;-).  Corona problems would be greatly exacerbated at
hundreds of kV... it would be quite a show!


On Sun, Jul 29, 2012 at 9:51 PM, David Speck <Dave@xxxxxxxxxxxxxxxx> wrote:
> Neon,
> Actually, many pole pigs have one winding, (I think it's the high voltage
> one) wound with aluminum, while using copper for the high current winding.
> Might also be the other way around, though.  Not sure at the moment.
> Dave
> On 7/29/2012 4:39 PM, Neon Tesla wrote:
>>            Oh No!
>> Someday we will even have to look out for aluminum pole pigs!
>> What's next?! Solid state pole pigs?! what is this world coming
>> to?!
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