This paper presents the operating principle of the automatic power factor compensation
controller (APFCC) by using solid state relay (SSR) which is inexpensive device and allows wireless
control. For the APFCC, there are 4 levels of operation including 0.145kvar 0.290kvar 0.436kvar and
0.580kvar. In addition, the APFCC has been evaluated by supplying the different loads. In conclusion,
it is clear that the power factor has been 22 percent increase in compensation. Furthermore, the wireless
control testing has been executed within load panel center. It is found that the APFCC can compensate
the power factor of system with reliability and be able to carry out pilot-scale test to large-scale system
eventually