I'm doing some experiments with a transformer, measuring some physical quantities.
First I did an experiment with the transformer in open-circuit. I determined the voltages and currents on both primary and secondary winding.
I know the power factor measures the ratio between active power and apparent power (it was in fact this way that I computed it).
However, what does it exactly mean? Specially in open-circuit? Is it the percentage of power that doesn't get "lost"?
I know that if I had a load connected it would be the percentage of power delivered to the load. But this way I'm not sure.
Then I computed the parameters of the transformer G_m and B_m. I converted them to per-unit values. Does this have any physical significance? Because B_m is more close to 1 than G_m. Does just mean that the inductor parameter is more relevant than the resistor one?
Second I did an experiment with the transformer in short-circuit. I determined the voltages and currents on both primary and secondary winding.
I have the same question about the power factor, what does it mean here? Power delivered to a short-circuit?
Then I computed the parameters of the transformer R_t and X_t. Again, converted them to per-unit values. I have the exactly same questions as before.
Third, I experimented with a load, same thing as before.
Now the power factor must mean the percentage of power delivered to the load, right?
Thanks in advance!
EDIT: Transformer model (valid in pu values).