On Thu, 30 Aug 2012, Jim Lux wrote:
Feeding the ground wire from my secondary through the center of the newly-minted CT and turning on the coil, I put my oscilloscope probe across the 14.7k ohm resistor (actually a 10k and 4.7k in series) and fired up the coil. The result is a nice 5.6V peak-to-peak sine wave at the ~500kHz resonant frequency of my secondary...So 5.6/14.7k = 0.38 mA 110:1 turns ratio implies about 408mA secondary current...
That would be a bit strange, since I'm feeding the primary with 24V @ 2A ... I doubt I would get any arcs at all if there was only 96V at the top of the secondary (and any more voltage would imply the impossible).
There's still the issue that when I calibrated the current transformer against a known voltage/current source I got a very different conversion factor (2mV per mA through the wire under test).
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