... -250S, ZX7-315S, ZX7-400S, ZX7-500S, ZX7-630SIGBT inverter manual arc welding machineCharacteristics and application:Application: 1. Welding carbon steel ... -500ZX7-630Power VoltageAC 220V±15%, 50/60HZAC.(3 Phase) 380V ±10% 50HzRated input power7.3KVA9KVA9.9KVA12.4KVA19.3KVA25KVA31KVANo-load output voltage57V77VOutput ... (L/min)25L/min ZX7-400S, ZX7-500S IGBT inverter manual arc welding machine