Abstract: A welding machine has a welding unit for generating a welding voltage/current, and at least one welding tool connectable to the welding unit by a cable. The welding unit has a closed protective casing, and a cooling unit for cooling the welding tool and/or cable on command. A modular unit containing the cooling unit is insertable and easily removable from inside the casing and is closed for protection of the welding unit.

Abstract: An electric arc welding machine includes a manual welding tool, an electric power unit, and a cable electrically connecting the welding tool and the electric power unit. The electric power unit includes an electric power converter, an electronic central control unit, and a control panel that allows the user to manually set a desired operating mode and operating specifications based upon equipment selected from a memory module. The electronic central control unit provides real-time control over electric power supplied to the welding tool in accordance with the manually set operating mode and selected equipment.

Abstract: A welding machine having a welding unit for generating a welding voltage/current, and at least one welding tool connectable to the welding unit by a cable and supplied by the cable with welding voltage/current; the welding unit has a closed protective casing, and a cooling unit for cooling the welding tool and/or cable on command; and the welding machine also has a modular unit containing the cooling unit and insertable stably and in easily removable manner inside the casing which is closed for protection of the welding unit, so as to be easily extracted and detached from the casing.

Abstract: An electric arc welding machine having a welding tool designed for manual manipulation by the user, and an electric power unit connected electrically to the welding tool by a connecting cable to supply the welding tool with electric operating power; the electric power unit having an electric power converter for powering the welding tool over the connecting cable, an electronic central control unit for controlling the electric power converter, and a control panel allowing the user to manually set, in the electronic central control unit, the desired operating mode from those available; the welding machine also having manually-operated first selecting elements by which to manually set in the electronic central control unit the operating specifications of the connecting cable and/or the welding tool currently connected to the electric power unit.