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Re: Power Factor Correction weirdness?

Hi Adam,

	The results make perfect sense.  When you add PF caps you are basically
trying to get the input power to the transformer to match the power
dissipated in the load (power factor = 1).  In the case of a short on the
output, the power dissipated in the load is almost zero.  Thus you should
be able to "tune" with PFC caps until you only see the power being
dissipated in the transformer's losses.  

	What "I" wonder is if the 150uF value that is good for your shorted load
is also optimal for other operating TC loads??  Have to think about that...

Cheers,

	Terry


At 11:11 PM 02/08/2000 -0500, you wrote:
>
>Can someone explain what I'm seeing when I attempt to power factor correct
>my neons? I've got my DMM in series with the primary of a 12,000 60mA NST,
>and the secondary of the NST is shorted.  With no PFC caps, it reads 7.13
>Amps.  But when I start adding caps in parallel with the NST primary, the
>current reading drops dramatically-- more than I expected it to.  Here are
>the results:
>
>    PFC Caps    Ammeter Reading (amps)
>
>    0                7.13
>    50 uF            4.96
>    100 uF           2.81
>    150 uF           1.14
>
>What's going on here? is this right?
>
>-Adam
>adamsmith-at-mediaone-dot-net
>