17
Active Power to a Balanced
Wye Load
•
P
f
=
V
f
I
f
cos
q
f
•
P
T
= 3
P
f
= 3
V
f
I
f
cos
q
f
•
P
T
=
V
L
I
L
cos
q
f
•
P
f
=
I
f
2
R
f
•
P
T
= 3
I
f
2
R
f
