100A is the current for each of the three phases. V X A X sqrt(3) = 69.3 kVA. V X A X sqrt(3) X power factor = input kW. 40 kW is the rated mechanical output power assuming that the marking on the motor conforms to international standards. Input power X efficiency = output power.
If the 40 kW rating is marked on the machine, it is the input power for the entire machine including the sum of the power inputs to all of the motors plus whatever else uses electric power in the machine. The power factor is then 40/69.3 = 0.577, a rather low power factor, but not unreasonable.