FastMig Pulse 350, 450
8
EN
2.5.4 Welding and earth return cables
Kemppi 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.
50mm 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 welding
power, voltage loss increases, and therefore smaller cross sectional interconnecting power and
return cables will restrict the welding performance of your machine.
• FastMig Pulse 350 – 70 to 90 mm²
• FastMig Pulse 450 – 70 to 90 mm²
The enclosed table shows typical load capacities of rubber insulated copper cables, when
ambient temperature is 25 °C and the cable temperature is 85 °C.
Cable Duty cycle ED Voltage loss / 10 m
100 % 60 % 30 %
50 mm²
285 A 370 A 520 A 0.35 V / 100 A
70 mm²
355 A 460 A 650 A 0.25 V / 100 A
95 mm²
430 A 560 A 790 A 0.18 V / 100 A
Do not overload welding cables due to voltage losses and heating.
NOTE! Always check the serviceability of the earth return cable and clamp. Ensure the metal
surface to which the cable is connected is clean from metal oxide or paint. Check the connector to
the power source is fastened correctly.
2.5.5 Interconnection with wire feeder
Kemppi provide a choice of interconnection cable sets for dierent environments. Only
materials that meet the demands of Kemppi's international markets are used in their
construction.
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 correctly
fastened. Loose connections reduce welding performance and may result in damage to
connectors due to heating eects.
For correct connection and conguration of cable sets, please refer to schematic drawings:
2.5.1 and 2.5.2
NOTE! FastMig 350/450 power sources are designed to be used ONLY with MXF wire feed units.
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