... response, saving energy Overheating, over-current, power supply protection LGK Series Plasma Cutting Machine LGK-30,LGK-40 used MOSFET inverter ... %Insulation ClassFProtection ClassIP21Type of CoolingWind CoolingWeight (Kg)10103235Dimension (mm)370*190*270370*190*270650*320*400650*320*400