... machine are matched with overload, over heat, over current protection device. Character:Imported SCM control, SIEMENS IGBT power pipe, ... voltage rangeAutomatic over heat, over load, over current protection.Stable function, long lifespan.Automatic power off function. ... standard: GB470611998Max permitted current: less than 6A Shell protection grade: IP21Working frequency: 30KHZ(+-5%) Sealing diameter: ...