The power consumption of the same load, different power motors?
The key lies in the size of the load, according to the current data you provide, basically can determine whether the motor is loaded; if the motor using 37kW, because the load torque constant, the motor for rated torque, it is necessary to reduce speed, increasing the current, the current may be not reached before 70A would have burned the motor.
The current may be a little smaller, because the power consumption of the motor will be smaller in every respect. Both active and reactive power will be smaller.
When the 380V/55KW motor is full, the current is 100A. You only have 70A now, which means that your load is only about 35KW37KW motor can be used instead of the current slightly less than 70A, but not much. Nothing changed, slightly less. Idle work will be much smaller.
