... 3. Heating furnace or induction coil.Max input power frequency:90KWFrequency:1-20KHzMax input current:135AOutput current:25- ... metal anneal, diathermanous shaping, high frequency quenching,metal high frequency jointing, medium smelting, high frequency soldering and brazing, heat smearing, ... Soldering, Induction Tempering, Pre-Owned Equipment etc. medium frequency induction heating power supply