Sari, Devi Siska KurniaHamzah AmirSukma Dian Yayan2013-06-282013-06-282013-06-28rio andikahttp://repository.unri.ac.id:80/handle/123456789/3980Power factor is one of the problems in the electric power quality improvement. Power factor value that is too low can result in some electrical equipment can not operate properly. In many ways, low power factor need not cost cheap. To assist in the use of power factor correction capacitor banks to provide reactive power in the system. To improve the power factor is low, then the study will be compensated automatically by using smart relay as a switch to the capacitor bank. Cos phi great start on system is 0,39 lag with the addition of 13,5 μF capacitor to cos phi be 0.96 Lag.otherCapacitor BankSmart RelayPower Factorstudent Paper Post Degree