12
11.4
Apparent Power and Power Factor
(2)
•Lagging - inductive load
•Leading - capacitive load
θv– θi >
0
θv– θi <
0
Resistive and reactive load (R and L/C)
P = 0,
no real power consumption
θv– θi =
±90o, pf = 0
Purely reactive load (L or C)
P/S =
1, all power are consumed
θv– θi = 0,
Pf = 1
Purely resistive load (R)