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Re: pole pig ideas
Tristan wrote:
>One of the re-occuring comments was that a 40kV cap was insufficient
for
>a 19,920V pole pig. If I wanted to use this 40kV cap without a major
It all depends on how you set your gaps. If you set them narrow - then
the voltage will be less...
>change, would it be possible to apply 120VAC to the LV windings of the
>pig instead of 240VAC? If this works it should reduce the output to
>10kV.
Yep. This is correct. You'd apply the 120 across the pig's 240 lugs to
produce about 10kv of output.
> But assuming the 10kVA rating is because of the wire size(?) it
>should still only be able to pass 42A, so the max power would be cut in
>half to 5kVA???
I think what really matters is not saturating the core. This is a
function of amp*turns on the primary. In this case since you have not
changed the number of turns - then I agree- you'd want to limit the
input current to 42 amps to operate it in the linear region.
But you can run a substantial overload w/o hurting anything! :)
You will probably have to operate this off of a separate circuit since
you'll be pulling 42 amps from one hot to neutral...
> If this is the case, does anyone now if a pole pig can
>be overpower (I assume it can), and if so how much and for how long? I
>would think it could be run at 200% for runs of <1min, with cool down
>time inbetween. Is this correct?
I'd bet it'd take a 200% overload for an hour! :) These things are
really overbuilt!
My opinion is that the pig will not be the first thing to fail during an
overload. Example - I'd say your gaps will be fried long before that!
:)
-Bill
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