APFC Panel Control Wiring Diagram | How to do Control Wiring of Auto Power Factor Correction Panel

The proposed device automatically corrects the
power factor without any human presence. It consists of a
microcontroller which detects the power factor value, if the
power factor goes below 0.9(lagging) during peak hours it
automatically connects capacitor banks to improve it. Now a
days, one APFC panel cannot be used for different application.
To make it universal we provide four keys UP, DOWN, ENTER,
MENU. These keys are used to enter the capacitor values and to
vary the CT ratio. As the capacitor values and current magnitude
varies according to the application. The main aim of the
proposed model is to maintain the power factor nearer to 0.9
which helps to increase the efficiency of the system.

Power factor correction is the process of compensating a
lagging current by a leading current, through connecting
capacitance to the supply. Automatic power factor correction
device reads the power factor from the line voltage and line
current by determining the delay in the arrival of the current
signal with respect to the voltage signal. This time values are
calibrated as phase angle and corresponding power factor.
This values are then displayed on LCD. The main circuit
calculate the compensation requirement and according to that
switched on different capacitor bank. So that power factor is
adjusted nearer to unity as possible.

The proposed model helps to correct power factor
automatically without any human presence. It can be
concluded that the same proposed power factor correction
model can be used for different applications such as industries,
power systems and for domestic purpose. The use of
microcontroller reduces the overall cost of model and speed of
operation will get increase. Microcontroller is used as it can be
control many parameters at a time and another reason is that it
has inbuilt timer, Data memory, Program memory etc. So it
occupy less space. The automatic power factor controller
device helps to reduce magnetizing current and reduces
charges on utility bills. So power factor correction technique
helps to improve the efficiency of the system and the life of
apparatus.