|
Formulas For Electrical Motors:
|
| To Find: |
Direct
Current |
Single Phase |
Three Phase |
| Horse Power |
E x I x EFF
746 |
E x I x EFF x PE
746 |
1.732 x E x I x EFF x PF
746 |
| Current |
746 x HP
E x EFF |
746 x HP
E x EFF x PF |
746 x HP
1.732 x E x EFF x PF |
| Efficiency |
746 x HP
E x I |
746 x HP
E x I x PF |
746 x HP
1.732 x E x I x PF |
| Power Factor |
--------- |
Input Watts
E x I |
Input Watts
1.732 x E x I |
|
E = Volts HP = Horsepower PF = Power Factor (decimal)
EFF = Efficiency (decimal) I = Amperes |
| Formulas For Electrical Circuits: |
| To Find: |
Direct Current |
Single Phase |
Three Phase |
| Amperes |
Watts
Volts |
Watts
Volts x Power Factor |
Watts
1.732 x Volts x Power Factor |
| |
-------------------- |
Volts x Amperes Amperes |
1.732 x Volts x Amperes |
| Watts |
Volts x Amperes |
Volts x Amperes
x Power Factor |
1.732 x Volts x Amperes
x Power Factor |
|
| OHMS Law |
Capacitance in Microfarads at 60 HZ. |
Ohms = Volts/Amps (R=E/I)
Amps = Volts/Ohms (I=E/R)
Volts = Amps x Ohms (E=IR) |
Capacitance = 2650 x Amperes
Volts
Capacitance = 2.65 x kVAR
(Volts) squared |
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