... area,low distortion,beautiful welding gap.Major parameters modelNB(KR)-250NB(KR)-350NB(KR)-500NB(KR)-600Power voltage380380380380Phase3333Fruauency50505050Rated input cuent9.518.13243.2Idle Load ... -2816-3616-4517-44 Duty cycle(W)50505050insulation classF ND(KR)SERIES THISTOR CONTROL CO2/MAG GAS-SHIELDED WELDER