211i Operating Manual FabricatOr® - Victor Technologies - Europe

INTRODUCTION FABRICATOR 211i
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 welding
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, 210 amperes at 24.5 volts. This means that it has been designed and built to provide the
rated amperage (210A) 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 allowed
to cool. The thermal cut out will operate if the duty cycle is exceeded.
Duty Cycle (PERCENTAGE)
Duty Cycle (PERCENTAGE)
100
90
80
70
60
50
40
30
20
10
0
0
100
90
80
70
60
50
40
30
20
10
0
SAFE OPERATING REGION
(MIG, TIG & STICK)
FABRICATOR 211i
10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 210 220
Welding Current (AMPS)
Figure 2-2: Fabricator 211i Duty Cycle on 230VAC
STICK
SAFE OPERATING REGION
(MIG, TIG & STICK)
Welding Current (AMPS)
STICK / TIG
Manual 0-5225 2-3 INTRODUCTION
MIG
Art # A-10935
FABRICATOR 211i
0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150
Figure 2-3: Fabricator 211i Duty Cycle on 110VAC
MIG
TIG
Art # A-10936