OM-223 194 Page 9
3-2. Duty Cycle And Overheating
6 Minutes Welding
4 Minutes Resting
Duty Cycle is percentage of 10 min-
utes that unit can weld at rated load
without overheating.
If unit overheats, thermostat(s)
opens, output stops, and cooling
fan runs. Wait fifteen minutes for
unit to cool. Reduce amperage or
voltage, or duty cycle before
welding.
Y
Exceeding duty cycle can
damage unit and void
warranty.
Overheating
0
15
A or V
OR
Reduce Duty Cycle
Minutes
60% Duty Cycle At 400 Amperes
100% Duty Cycle At 300 Amperes
sduty1 5/95 / 187 478-A
% DUTY CYCLE
Continuous Welding
3-3. Volt-Ampere Curves
The volt-ampere curves show the normal minimum and maximum voltage and amperage output capabilities of the welding power source. Curves
of other settings fall between the curves shown.
Model 273
Model 333
Model 271
Model 383
MIN
MAX
MIN
MAX
MIN
MAX
MAX
MIN
Model 293
MIN
MAX
Summary of Contents for Migmatic 271
Page 24: ...OM 223 194 Page 20 Notes ...
Page 30: ...OM 223 194 Page 26 SECTION 7 PARTS LIST Figure 7 1 Wrapper Assembly All Models ...
Page 32: ...OM 223 194 Page 28 April 17 2006 Figure 7 2 Main Assembly for Migmatic 271 ...
Page 34: ...OM 223 194 Page 30 April 17 2006 Figure 7 3 Main Assembly for Migmatic 273 ...
Page 36: ...OM 223 194 Page 32 April 17 2006 Figure 7 4 Main Assembly for Migmatic 293 ...
Page 38: ...OM 223 194 Page 34 April 17 2006 Figure 7 5 Main Assembly for Migmatic 333 ...
Page 40: ...OM 223 194 Page 36 April 17 2006 Figure 7 6 Main Assembly for Migmatic 383 ...
Page 45: ...Notes ...
Page 46: ...Notes ...