Intelligent single-phase CT-sensing power factor controller with LED 7-segment 4-digit display, designed for central reactive power compensation via automatic capacitor bank switching. Offers 8 & 12 capacitor steps in Auto/Manual mode, measures A, V, PF, Cos Phi, W, Var, VA, with automatic C/k calculation, programmable target Cos Phi, over-voltage and over/under-compensation alarms, in a compact 144×144mm flush-mounting case.