Controllers for AC Voltage Stabilisers Home Smart Controllers Controllers for AC Voltage Stabilisers Stable precise voltage, pure sine wave. Quad20 Controllers for AC voltage stabilisers 380V or 400V or 415V 60kW 220V 230V 240V 20kW per phase More information Product specifications Product enquiry Quad40 Controllers for AC voltage stabilisers 380V or 400V or 415V 120kW 220V 230V 240V 40kW per phase More information Product specifications Product enquiry