Limiting, scaling and biasing analog input (ADC) of microcontroller
When used properly, a current transformer produces an output current that is proportional to its input current by some fixed ratio. You convert this current to a voltage for measurement by allowing it to flow through a load resistor, and the voltage/current scale factor is directly controlled by the value of the load resistor that you use.

For example, some of the transformers you have linked to have ratios of 1000:1 or 2000:1. Let's pick a 1000:1 transformer: If you apply 10Arms to its input, it will generate a current of 10mArms at its output. If you want this to scale to fit within an ADC range of, say, 0-5V, you would use a load resistor of 100&Omega; to turn this into a voltage waveform of 1.00Vrms (2.828Vp-p).

You would need to bias one end of the coil/load resistor combination to +2.5V in order to keep the other end, which will swing from 1.086V to 3.914V, within the range of the ADC. See the example on Circuitlab:



Your proposed circuit is loading the current transformer with a total of 11K, which is far too high. In this mode of operation, the output of the transformer is no longer directly proportional to load current.