Re: Capacitor formula
X-Envelope-From: James.P.Lux-at-jpl.nasa.gov Wed Aug 26 12:35:30 1998
Tesla List wrote:
> KVAR is KVA Reactive, that is the capacitive power at the working voltage,
> so it would draw 39100/14400 amps, or about 2.7 amps at 14400V. That would
> give it 5300 ohms of capacitive reactance, or about .5 uF. The formula does
> it all in one step, and is normalized to kV, and uF. Dont recall what the
> 95 KVBIL means.
BIL = Basic Impulse Insulation Level It is the withstand voltage for a
simulated lightning type impulse 1.2 uSec rise time(10% to 90%)/50 uSec
fall time (100% to 50%). What the 95 kV rating means is that the unit
can take that much voltage without flashing over to ground. 95 kV is a
typical rating for outdoor components on medium voltage (e.g. 14 kV)
You'll also see BSL, which refers to switching impulses, 250 uSec rise/
2.5 mSec fall.