Note! Exceeding duty cycle can damage unit and void warranty.
Fig. 1-4-1: Duty cycle
1-5 Applications
It is not only used in carbon steel and low alloy steel welding, but also used in stainless steel, high alloy steel, copper, silver,
molybdenum and titanium welding.
The power source is designed for the following recommend areas:
- Shipbuilding and offshore engineering
- Pipeline industry
- Shipyard
- Boiler and container manufacture
- Aerospace industry
- Chemical structure and engineering
- Electric power construction
- Automobile, vehicle manufacture
- Mechanical industry
- Maintenance and repair
1-6 Warning label
The warning label is affixed onto the top of the power source, and it must not be removed or painted over.
4
0
15
Overheating
Minute
OR
Reduce Duty Cycle
1-4 Duty cycle
Duty cycle is percentage of 10 minutes that a machine can weld at rated load without overheating. If overheats,
thermostat(s) will open, output stops, and cooling fan runs. Wait for fifteen minutes for the machine to cool down. Reduce
amperage or duty cycle before welding.
Fig. 1-6-1: Warning label
10 20 30 40 50 60 70 80 90
100
0
% DUTY C Y CLE
WELD AMPERES
100
315
1000
400
500
630
1250
ARC/TIG400/400B/400II
ARC/TIG500
ARC/TIG630
ARC/TIG1000
ARC/TIG1250
244
310
387
ARC/TIG315
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