How do you design a power factor correction system for an industrial load?

Design involves: measuring existing power factor and real/reactive power, calculating required capacitive VARs: Qc = P(tan(phi1) - tan(phi2)) where phi1 and phi2 are original and target power factor angles. Select capacitor bank rated for line voltage with appropriate KVAR. Consider automatic switching for varying loads, detuning reactors if harmonics present, and inrush current limiting. Verify resonance is not near harmonic frequencies. Target PF of 0.95-0.98 balances cost and penalties.