Resources Your Company Can Use Today!

OHMS LAW

Ohms = Volts Amperes
Amperes = Volts Ohms
Volts = Amperes x Ohms
POWER – A. C. CIRCUITS

Power Factor = Watts (Volts x Amperes)
Three Phase Kilowatts = (Volts x Amperes x Power Factor x 1.732) 1000
Three Phase Volt-Amperes = Volts x Amperes x 1.732
Three Phase Amperes = (746 x Horsepower) (1.732 x Volts x Efficiency x Power Factor)
Single Phase Kilowatts = (Volts x Amperes x Power Factor)1000
Single Phase Amperes = (746 x Horsepower) (Volts x Efficiency x Power Factor)
POWER – D.C. CIRCUITS

Watts = Volts x Amperes
Amperes = Watts Volts
Horsepower = (Volts x Amperes x Efficiency) 746
MOTOR APPLICATION FORMULAS

Torque (lbs.-ft.) = (Horsepower x 5250) RPM
Shaft Stress (lbs. per sq. inch) = (Horsepower x 321000) (RPM x Shaft Diam3)
FOR PUMPS

Horsepower = (GPM x Head in Feet x Specific Gravity) (3960 x Efficiency of Pump)
FOR FANS & BLOWERS

Horsepower = (CFM x Pressure (lbs. per sq. ft.)) (33000 x Efficiency)
SPEED

Synchronous RPM = (Hertz x 120) Poles
Percent Slip = (Synchronous RPM – Full Load RPM) Synchronous RPM x 100