... steel, alloy steel, copper and other metals. WS-160, WS-200, WS-250, WS-315, WS-400, WS-500 Manuel and argon welding machine1Advanced inverter technology ... -315WS-400Power VoltageAC 220V±15%, 50/60HZAC.(3 Phase) 380V ±10% 50HzRated input power7.3KVA9KVA9.9KVA12.4KVA19.3KVARated input current33A41.3A15A18 ... L/min Cooling water flow (L/min) cooling 1L/min WS-400 Manuel and argon welding machine