The most economically advantageous piece of machinery for preserving voltage stability on transmission lines is our ABB Reactors. This is sued for making up for the capacitive charging of the high-voltage AC lines and cables of the main producers of reactive power. These are connected in series to create a detuned resonant circuit that gives the entire system inductive impedance at all harmonic frequencies. These ABB Reactors were created specifically to function with FMLF capacitors in series.