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Re: [TCML] PT mA

Insertion of upstream reactance as a first order approximation model
converts PT into a
constant current power source (since you are limiting primary current).
Maximum primary
current of 30A multiplied by inverse turns ration of primary/secondary
(120/14,4000, 0.00833)
suggests maximum secondary current of ~ 0.25A.  If you are boosting voltage
with a 120%
variac, current would likewise be boosted to nearly 300mA (0.291A).

Not exact, but will get you in the ball field.


On Thu, Jun 13, 2013 at 4:45 PM, Tim Flood <tflood@xxxxxxxxxxx> wrote:

> I've been running some numbers in Java and guessing at the Transformer
> Rated Output Current for a 120/14400 PT ballasted with 500 ft. spool of 12
> ga. stranded wire. The number I recall is 280 mA.
>
> Anyone know the correct current output?
>
> Thank you,
>
>
> Tim
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>



-- 
Dave Sharpe, TCBOR/HEAS
Chesterfield, VA USA

Sharpe's Axiom of Murphy's Law
"Physics trumps opinion!"
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