Hi again,
You can calculate the turns ratio by using that data sheet, which i think you already did.
One way is to start with the value of 100 ohms and noting on the data sheet it says 2 volts at 60 amps primary current.
Assuming one turn on the primary, 2v with 100 ohms is simply 2/100 amps, which is 0.020 amps on the secondary,
and with 60 amps on the primary that means the turns ratio is 60/0.02 which comes out to 3000 as you found.
If you want to use this device to measure power factor you will note that phase angle becomes an important quantity
that you need to measure. Since the device may have some inherent phase shift already (large turns ratio) it is
probably a good idea to test it for that before you use it for making measurements. To do this you can apply a known
voltage and known resistive load and look for any phase shift and take this phase shift into account when you make the
final measurements.
As others have said, you should be able to calculate the power factor once you measure the current and voltage and take
the phase angle between current and voltage into account.
In the USA, 100 amp main breaker panels used to be common, but over the past 20 years or so they increased the common
panel up to about 200 amps i think. That's for 120vac though, so at 220vac 100 amps is probably common, or at least it
should be
That means 100 amps will probably be the max for a house but i would be surprised to see a house draw that
much really unless of course you have electric heating and the heating is running.