AC
Equations |
|
DESIRED
DATA |
ALTERNATING
CURRENT |
DIRECT
CURRENT |
|
Single-Phase |
Two-Phase*
Four-Wire |
Three-Phase |
|
Amperes when
kva
is shown |
kva x
1000
E |
kva x
1000
2 x E |
kva x
1000
1.73 x E |
kva x
1000
E |
|
Amperes
when
kilowatts are shown |
kw x
1000
E x pf |
kw x
1000
2 x E x pf |
kw x
1000
1.73 x E x pf |
kw x
1000
E |
|
Amperes
when
horsepower is shown |
hp x
746
E x %Eff x pf |
hp x
746
2 x E x %Eff x pf |
hp x
746
1.73 x E x %Eff x
pf |
hp x
746
E x
%Eff |
|
Kilovolt-Amperes |
I x
E
1000 |
I x E x
2
1000 |
I x E x
1.73
1000 |
I x
E
1000 |
|
Kilowatts |
I x E x
pf
1000 |
I x E x 2
pf
1000 |
I x E x 1.73 x
pf
1000 |
I x
E
1000 |
|
Horsepower |
I x E x %Eff x
pf
746 |
I x E x 2 x %Eff
x pf
746 |
I x E x 1.73 x
%Eff x pf
746 |
I x E x
%Eff
746 |
-
OHMS
LAW
-
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
- 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
-
- Eff. = Efficiency, PF =
Power Factor
KW = Kilowatts
HP =
Horsepower
| |
![[Under Construction]](images/undercon.gif){kind=small}
