Power factor correction (PFC) of electrical systems monophase and three-phase lines.

It calculates the reactive power to install to obtain the desired power factor (cosø) starting by the initial power factor (cosø).

Data input

Initial power factor (cosø):

cosø

Required power factor (cosø):

cosø

Active power

kW

Circuit voltage

V

Working frequency

50 Hz

60 Hz

Mono-phase line.
One capacitor

Tri-phase line.
3 capacitors in star configuration

Tri-phase line.
3 capacitors in delta configuration

Notes.
To obtain optimal results the PFC must be local (close to the machinery), in this way you will recover also the loss on the supply line.

Example of characterisic cosø to correct :

• 0.5 - 0.6 : fluorescent lamps (neon) complete with reactor.
• 0.3 : high pressure sodium lamps complete with reactor.

Example of correction a 32 W neon lamp :

• cosø Initial = 0.6
• cosø required = 0.98
• kW = 0.032
• V = 220
• Hz = 50
• mono-phase line.