Do circuit breakers trip on Apparent or True Power?
Thermal and magnetic circuit breakers trip on current, not power.
They know nothing about the voltage in the circuit until the contacts open and start to arc.


Figure 1. A single-phase circuit breaker. Image source Electrical Engineering Portal.
Note that in the single-phase circuit breaker there are only two terminals. When the circuit breaker is closed the voltage difference between the two cable terminals will be very small due to the very low contact resistance. As a result, the circuit-breaker is unaware of the voltage or power being drawn through it.
The three-phase breaker is usually three individual breakers with a mechanical link between them so that they all switch off if there is an over-current on one phase. Usually there will be no cross connection between the phases which would be required if voltage (or power) measurement was being done.

From the OP's self-answer below:

... so, a Circuit Breaker is actually tripping to the current related to the Total Power (kVA).

No, you are assuming that the voltage is constant during the fault. In general the voltage will drop / droop during a fault and that means that it could trip on a wide range of kVA. The circuit breaker trips on current only. You can, if it's useful, calculate the maximum kVA that the breaker can handle at nominal line voltage but that's not what you are asserting.