Kemppi 350 Operating Manual

Contents

EN2.5.4 welding and earth return cablesKemppi always recommend the use of high quality copper cables with a suitable cross-sectional area. Cable size should be selected depending on the intended welding application.50mm2 Copper welding cables may be used for low duty work in basic or Synergic 1-MIG.However when using Pulse MIG/MAG process, and or longer cables, and or higher weldingpower, voltage loss increases, and therefore smaller cross sectional interconnecting power andreturn cables will restrict the welding performance of your machine.• FastMig Pulse 350 – 70 to 90 mm²• FastMig Pulse 450 – 70 to 90 mm²The enclosed table shows typical load capacities of rubber insulated copper cables, whenambient temperature is 25 °C and the cable temperature is 85 °C.Cable Duty cycle ED Voltage loss / 10 m100 % 60 % 30 %50 mm² 285 A 370 A 520 A 0.35 V / 100 A70 mm² 355 A 460 A 650 A 0.25 V / 100 A95 mm² 430 A 560 A 790 A 0.18 V / 100 ADo not overload welding cables due to voltage losses and heating.NOTE! Always check the serviceability of the earth return cable and clamp. Ensure the metalsurface to which the cable is connected is clean from metal oxide or paint. Check the connector tothe power source is fastened correctly.2.5.5 interconnection with wire feederKemppi provide a choice of interconnection cable sets for different environments. Onlymaterials that meet the demands of Kemppi's international markets are used in theirconstruction.Used correctly, Kemppi cables sets ensure high welding performance and serviceability.Before use, always ensure the cable set is in good condition and that connectors are correctlyfastened. Loose connections reduce welding performance and may result in damage toconnectors due to heating effects.For correct connection and configuration of cable sets, please refer to schematic drawings:2.5.1 and 2.5.2NOTE! FastMig 350/450 power sources are designed to be used ONLY with MXF wire feed units.3. OPeratiOn COntrOl3.1 Main switCh i/OWhen you turn the on/off switch into I -position, the pilot warning lamp is illuminated andthe machine is ready for use. Always turn the machine on and off with the power source mainsswitch. Never use the mains plugs as a switch.3.2 PilOt laMPsThe pilot lamps of the machine report its operational state:The green pilot lamp when lit, indicates that the machine is switched on and ready foruse, and that it is connected to the mains supply with the power source main switch in theI-position.When lit, the orange lamp indicates that the thermal protection circuit has been activated dueto higher than normal working loads that exceed the rated duty cycle. The cooling fan willcontinue to run and cool the machine down. When the lamp is off the machine is again readyto weld.8FastMig Pulse 350, 450 / © Kemppi Oy / 1110