Power Factor

What Is Power Factor

Power factor is the ratio of true power (or active power KW) consumed by a load to the apparent power (KVA - which is the product of voltage and current) drawn by the load.


Before and after Power Factor Correction (PFC)
S1 = apparent power before PFC
S2 = apparent power after PFC
P = active power
Q1 = reactive power before PFC
Q2 = reactive power after PFC
Qc = Q1-Q2 compensation power of capacitor
j1 = phase angle before PFC
j2 = phase angle after PFC