• 1 HP (motor) = 0.746 KW (operating energy)
• 5 HP x 0.746 KW/HP x 3413 BTUH/KW = 12,700 BTUH = 1 Ton of Cooling
• Watts = Volts x Amps
• Efficiency = 746 x Output Horsepower (HP) / Input Watts
• KW (1 Phase) = Volts x Amps x Power Factor / 1000
• KW (3 Phase) = Volts x Amps x 1.732 x Power Factor / 1000
• KVA (3 Phase) = 1.732 x Volts x Amps /1000
• BHP (3 Phase) = 1.732 x Volts x Amps x Power Factor x Device Efficiency / 746
• Motor HP = BHP / Motor Efficiency
Motor Drive Formulas
DFP x RPMFP = DMP x RPMMP
BL = [(DFP + DMP) x 1.5708] + (2 x L)
Where
• DFP = Fan Pulley Diameter
• DMP = Motor Pulley Diameter
• RPMFP = Fan Pulley RPM
• RPMMP = Motor Pulley RPM
• BL = Belt Length
• L = Center-to-Center Distance of Fan and Motor Pulleys
