### GENERAL TECHNICAL MOTOR INFORMATION

 TO FIND DIRECT CURRENT SINGLE PHASE THREE PHASE HORSE POWER (E * I * EFF) / 746 (E * I * EFF) / 746 (1.732 * E * I * EFF * PF) / 746 CURRENT (746 * HP) / (E * EFF) (746 * HP) / (E * EFF * PF) (746 * HP) / (1.732 * E * EFF * PF) EFFICIENCY (746 * HP) / (E * I) (746 * HP) / (E * I * PF) (746 * HP) / (1.732 * E * I * PF) POWER FACTOR —- (Input Watts) / E * I (Input Watts) / (1.73 * E * I)

E = Volts
EFF = Efficiency (decimal)
HP = Horsepower
I = Amperes
PF = Power factor (decimal)

 TO FIND DIRECT CURRENT SINGLE PHASE THREE PHASE AMPERES Watts / Volts (Watts) / (Volts * power factor) (Watts) / (1.732 * Volts * power factor) VOLT- AMPERES ————– Volts * Amperes 1.732 * Volts * Amperes WATTS Volts * Amperes Volts * Amperes * Power factor 1.732 * Volts * Amperes * power factor
 TEMPERATURE CORRECTION OF WINDING RESISTANCE RC = RH X (K+TC) / (K+TH) RH = RC X (K+TH) / (K+TC) VALUE OF K Material               K Aluminum         225 Copper            234.5 RC = Resistance at temperature TC (Ohms) RH = Resistance at temperature TH (Ohms) TC = Temperature of cold winding (OC) TC = Temperature of hot winding (OC)

### MOTOR APPLICATION FORMULAS OUTPUT

 Horsepower = (Torque (lb.ft) * RPM) / 5250 Kilowatts = (Torque (N.m) * RPM ) / 9550 Torque (lb.ft) = (Horsepower * 5250) / RPM Torque (N.m) = (Kilowatts * 9550) / RPM

### SPEED – AC MACHINERY

 Synchronous RPM = (120 x Frequency) / Number of Poles Percent slip = (Synchronous RPM – Full-load RPM) / Synchronous RPM