Description Motor Specifications Voltage: Δ220/380Y (50 Hz) and Y: 400/460V (60 Hz) Amperage: 15.6/9 (50 Hz) and 8.7 (60 Hz) Power: 4 kW at both 50 Hz and 60 Hz Frequency: 50 Hz and 60 Hz Speed: 1420 rpm at 50 Hz and 1700 rpm at 60 Hz Dimensions Hole diameter at entrance: 220 mm Hole diameter at exit: 305 mm Fan overall width: 20 in Fan overall length: 42 in Fan overall height: 49 in