IEC 60034-30 pdf download Rotating electrical machines – Part 30: Efficiency classes of single-speed, three-phase, cage-induction motors (IE-code) 3Terms, definitions and symbols 3.1 Terms and definitions For the purposes of this document,the terms and definitions given in lEC 60034-1 and thefollowing apply. 3.1.1 brake motor a motor equipped with an electro-mechanical brake unit operating directly on the motor shaftwithout couplings...