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Volts (E) = Amps (I) x Ohms (R)
Amps (I) = Volts (E) / Ohms (R)
Ohms (R) = Volts (E) / Amps (I)
R=Ohms, E=Volts, I=Amperes
POWER - AC CIRCUITS Eff. = Efficiency, PF = Power Factor, KW = Kilowatts, HP = Horsepower | ||||||
|---|---|---|---|---|---|---|
| Efficiency | = | 746 x Output HP Input Watts | 
| 3ø KW | = | Volts x Amps x PF x 1.732 1000 |
| 3ø Amps | = | 746 x HP 1.732 x Eff. x PF |
| 3ø Eff. | = | 746 x HP 1.732 x Volts x Amps x PF |
| 3ø PF | = | Input Watts Volts x Amps x 1.732 |
| 1ø KW | = | Volts x Amps x PF 1000 |
| 1ø Amps | = | 746 x HP Volts x Eff. x PF |
| 1ø Eff. | = | 746 x HP Volts x Amps x PF |
| 1ø PF | = | Input Watts Volts x Amps |
| HP (3ø) | = | Volts x Amps x 1.732 x Eff. x PF 746 |
| HP (1ø) | = | Volts x Amps x Eff. x PF 746 |
| 1 KW = 1000 Watts | ||
| POWER - DC CIRCUITS Eff. = Efficiency, HP = Horsepower | ||||||
|---|---|---|---|---|---|---|
| Watts | = | Volts x Amps |
| Amps | = | Watts Volts |
| HP | = | Volts x Amps x Eff. 746 |
| |||
| MECHANICAL Torque in lb. ft., RPM=Revolutions Per Minute, HP = Horsepower | ||||||
|---|---|---|---|---|---|---|
| Torque | = | HP x 5250 RPM Result is lb.ft. Multiply by 12 for lb.in. |
| HP | = | Torque X RPM 5250 |
| 1 HP | = | 36 lb.in. @ 1750 RPM |
| 1 HP | = | 3 lb. ft. @ 1750 RPM |
| FAN AND BLOWER MOTORS CPM = Cubic Feet per Minute, Pressure in lb. / sg. ft., Eff. = Efficiency | ||||||
|---|---|---|---|---|---|---|
| HP | = | CFM x Pressure 33000 x Eff. | ||||
| PUMP MOTORS GPM = Gallons per Minute, S.G. = Specific Gravity, Eff. = Efficiency of Pump | ||||||
|---|---|---|---|---|---|---|
| HP | = | GPM x Head in Feet x S.G. 3960 x Eff. |
| Head in Feet | = | 2.31 P.S.I.G. |