FEATURES: • Constant Torque Operation from Zero to Base Speed with Vector Drives • Constant HP Operation to Twice Base Speed (Except Where Noted) • Continuous Duty at 40°C Ambient • NEMA®† Design A • Class F Insulation • Normally Closed Thermostats Standard (One Per Phase) • Shaft Grounding Ring Option on All Ratings • F1 Standard, Field Convertible to F2 for 180 Frame and Above • Removable Base 180 Frame and Above • Steel 56-140 Frame; Aluminum 180 Frame & Above • Encoder and Brake Provision on All Ratings • D-Flange Convertible Kit • Three Year Warranty