Safety And Installation; Duty Cycle - ESAB fabricator 141i Service Manual

3.01 Duty Cycle

The rated duty cycle of a Welding Power Source, is a statement of the time it may be operated at its rated welding current output with-
out 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.
100
90
80
70
60
50
40
30
20
10
0
0 10
Manual 0-5448
SECTION 3:

SAFETY AND INSTALLATION

Safe
Operating
Region
STICK (SMAW)
/ MIG (GMAW/ FCAW)
20 30 40 50 60
Welding Current (amps)
Figure 3-1: Fabricator 141i Duty Cycle
Fabricator 141i
TIG (GTAW)
70 80 90 100 110
3-1
ESAB FABRICATOR 141i
120 130 140 150
Art # A-11276_AB
SAFETY AND INSTALLATION