This standard applies to premium-efficiency totally enclosed fan-cooled (TEFC) and totally enclosed nonventilated (TENV), horizontal and vertical, single-speed, squirrel cage polyphase induction motors, 0.75 kW to 370 kW (1 hp to 500 hp), and up to 4000 V nominal, in National Electrical Manufacturers Association (NEMA) frame sizes 143T and larger, for petroleum, chemical, and other severe-duty applications (commonly referred to as premium-efficiency severe-duty motors). Excluded from the scope… read more of this standard are motors with sleeve bearings and additional specific features required for explosion-proof motors. read less
This standard applies to IE3 (premium-efficiency) totally enclosed fan-cooled (TEFC) International Cooling IC411, totally enclosed air over (TEAO) IC418 and totally enclosed non-ventilated (TENV) IC410, horizontal and vertical, single-speed, squirrel cage polyphase induction motors, 0.75 kW to 370 kW (1 hp to 500 hp), and up to 4000 V, in International Electrotechnical Commission (IEC) frame sizes (80) and larger, for severe-duty applications seen in the Process Industry (commonly referred to… read more as IE3 (premium-efficiency) severe-duty motors). Excluded from the scope of this standard are motors with sleeve bearings, totally enclosed blower cooled (TEBC) IC416, and additional specific features required for flame proof motors. read less
This standard applies to IE3 (premium-efficiency) totally enclosed fan-cooled (TEFC) International Cooling (IC)411, totally enclosed air over (TEAO) IC418 and totally enclosed non-ventilated (TENV) IC410, horizontal and vertical, single-speed, squirrel cage polyphase induction motors, 0.75 kW to 370 kW (1 hp to 500 hp), and up to 4000 V, in International Electrotechnical Commission (IEC) frame sizes (80) and larger, for severe-duty applications seen in the Process Industry (commonly referred to… read more as IE3 (premium-efficiency severe-duty motors). Excluded from the scope of this standard are motors with sleeve bearings, totally enclosed blower cooled (TEBC) IC416, and additional specific features required for flame proof motors. read less