Simple installation: these machines have three-phase 230 Volt motors. Thanks to the Inverter they can be connected to a 200 to 240 Volt, 50-60Hz power supply (to a single phase system or a threephase 230-400V system with Class A differential). The motor is fully protected from electricity overcharge due to accidental causes, motor overheating, short circuit and is less stressed due to the reduced rpm that is 900/1.750 instead of 1.400/2.800. The speed is variable due to the use of a potentiometer on the control panel. Due to the lower motor rpm and the adjustment of the chain tension with the chain tensioner, the moving components have less mechanical wear.