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