This is a power supply for MTI's arc melting system of SP-MSM207 and SP-MSM208SPECIFICATIONS IGBT Type Individual IGBT Inverter Type Digital/Micro-controlled Output Type AC/DC TIG, DC Stick Voltage/phase 208-240VAC, 1 and 3 phase, 50/60Hz I1MAX Current Rating(Inrush Amps) @240V 1 Ph: 40A @240V 3 Ph: 31A I1EFF Current Rating(Rated Amps) @240V 1 Ph: 32A @240V 3 Ph: 16A OCV 80V TIG Amps @ Rated Duty Cycle 60% @ 250A, 100% @ 200A Stick Amps @ Rated Duty Cycle 35% @ 200A, 60% 160A. 100% @ 130A TIG Output Range AC/DC 10.2-20V/ 5-250A / 10.2-20V/ 5-250A TIG Output Range AC 120V: 20-125A/10.8-15V240V: 20-185A/10.8-17.4V Minimum Amp DC TIG Start 5A Minimum Amp AC TIG Start 5A TIG Start Type HF and Lift Start TIG Pulse Yes Standard AC/DC Pulse Frequency 0.5 to 500 Hz Standard AC Pulse Frequency 20 or 250 Hz Pulse Time On (Duty Cycle) Fixed/Preset Pulse Amp Range Fixed/Preset AC Frequency (Hz) 20-250Hz AC Balance Range 10-90% of Positive AC Wave Forms Advanced Square Wave Foot Pedal Optional Compliance ETL certified ( One of kind of NRTL) Warranty 3 years of limited manufacture warranty