08 duty cycle, Duty cycle -3, Fabricator 141i – Tweco Fabricator 141i Operating Manual User Manual
Page 27: Safe operating region, Welding current (amps) duty cycle (percentage)
Fabricator 141i
Manual 0-51
45
2-3
INTRODUCTION
2.08 Duty Cycle
The rated duty cycle of a Welding Power Source, is a statement of the time it may be operated at its rated weld-
ing current output without exceeding the temperature limits of the insulation of the component parts. To explain
the 10 minute duty cycle period the following example is used. Suppose a Welding Power Source is designed to
operate at a 20% duty cycle, 100 amperes at 19 volts. This means that it has been designed and built to provide
the rated amperage (100 A) for 2 minutes, i.e. arc welding time, out of every 10 minute period (20% of 10 minutes
is 2 minutes). During the other 8 minutes of the 10 minute period the Welding Power Source must idle and be
allowed to cool.
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Fabricator 141i
Welding Current (amps)
Duty Cycle (percentage)
Safe
Operating
Region
STICK (SMAW)
/ MIG (GMAW/ FCAW)
TIG (GTAW)
Art # A-11276_AB
Figure 2-1: Fabricator 141i Duty Cycle