Automatic Power Factor Correction Panels

We are manufacturing APFCR panels that offers a power factor from 0.95 to 0.99. The panel comprises of mains bus bars, mains MCCB, and MCB, Contactor, Relay and Capacitor of proper rating for every bank. The stages depend upon the power load on that bank. Along with capacitors, Reactors are provided if there exists harmonics caused by non-linear power supply in the system.

Power Factor Concept
The power transmitted from the power plant to the power stations, from the power stations to the industries and from the industries to the machines results in large power losses due to the inductive loads. The pure inductive loads results in lagging power factor while the pure capacitive loads results in leading power factor and the pure resistive load do not have any effect on power factor.

Maximum motors offer Inductive loads, thus increasing the power losses.

Watt = Voltage x Current x Power Factor

Power Factor = cosФ where Ф is the angle between voltage wave & current wave called the phase angle. Smaller the phase angle, smaller will be the power losses.

To improve the power factor, capacitors are installed in parallel with the mains supply that offer leading power factor, and thus neutralize the effect of lagging power factor due to inductive loads.

Harmonics Concept and Solution
Today, every machine is electronically controlled. All the electronic circuits run on SMPS that convert utility AC voltage to regulated low voltage DC for internal electronics. These non-linear power supplies draw current in high amplitude short pulses. These current pulses create significant distortion in the electrical current and voltage wave shape. This is referred to as harmonic distortion and is measured in total harmonic distortion (THD). Other equipments connected to the same supply are also affected by these harmonics. To remove these harmonics, reactors are introduced in the system.