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Re: Repost: NST VA Rating and Power Factor
Original poster: "Ed Phillips by way of Terry Fritz <twftesla-at-qwest-dot-net>" <evp-at-pacbell-dot-net>
> I have two NSTs, both 12kv at 60ma, high power factor (rated 400va). It is
> my understanding that the HPF NSTs have a built in capacitor to correct the
> current lag due to the inductive load. Adding the PFC cap reduces the input
> current without reducing the output. See also Terry's posts on PFC caps.
Note that the NST power factor correction is for use with a RESISTIVE
load on the secondary. When you connect an NST to a TC primary you have
a capacitive load to start with, and the PFC on the line may or not
lower the line input current to the PFC/NST in parallel. It's not
obvious to me that PFC's make sense in that case.