From my experience working with CT's, putting a higher value resister across ct secondary will lower the secondary current by some factor but the voltage still has some relation to the primary current...... that's why a 100 ohm or 1000 ohm resistor will not create that much heat. My guess is that a 100 ohm load resister will probably drop the secondary current to less than 1 amp with 100 amp thru CT.

don