Firepower TIG 160S, Service Manual

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SAFETY AND INSTALLATION FIREPOWER 160 S
Manual 0-5371 3-1 Safety and Installation
3.01 Duty Cycle
The rated duty cycle of a Welding Power Source, is the percentage of a ten minute time period that it may be
operated at its rated output current without exceeding the temperature limits of the insulation of the component
parts. To explain the 10 minute duty cycle period, suppose a Welding Power Source is designed to operate with
a 30% duty cycle at 160 amperes and 26.4 volts. This means that it has been designed and built to provide the
rated amperage (160A) for 3 minutes, i.e. arc welding time, out of every 10 minute period (30% of 10 minutes
is 3 minutes). During the other 7 minutes of the 10 minute period the Welding Power Source must idle and be
allowed to cool.
0
20
40
60
80
100
120
0 20 40 60 80 100 120
AMPS
Duty Cycle(percentage)@ 40ºC
115VAC Input
Stick
Lift TIG
Art # A-09841
0
20
40
60
80
100
120
0 20 40 60 80 100 120 140 160 180
AMPS
Duty Cycle (percentage)@ 40ºC
230VAC Input
Lift TIG
Stick
Art # A-09842
Figure 3-1: 160S Duty Cycle (US Version)
SECTION 3:
SAFETY AND INSTALLATION