The three phase motors MPR series , closed , externally fan ventilated , manufactured according to the main international standards and particularly to the IEC 34 and 72 rules, are available in the sizes from 180 up to 315, with single speed pole numbers 4, 6 and 8, from 15 kW up to 110 kW. Coming from EM series, they are featured by strong oversized dimensions and are equipped with a high resistance special rotor cage. Due to their particular Torque-RPM mechanical curve, they are particularly suitable for those applications where big variations of load and speed are foreseen, such as presses, hammers, marble-cutter frames and so on.