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OM-201 540 Page 12
3-3. Duty Cycle And Overheating
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
duty cycle before welding.
NOTICE − Exceeding duty cycle
can damage unit and void warranty.
Overheating
0
15
A/V
OR
Reduce Duty Cycle
Minutes
duty1 4/95 − 206 789-A
Continuous Welding
100% Duty Cycle At 675 Amperes
3-4. Volt-Ampere Curves
va_curve1 4/95 − 221 502-A
Volt-ampere curves show minimum
and maximum voltage and amper-
age output capabilities of unit.
Curves of other settings fall be-
tween curves shown.
. This volt-ampere curve repre-
sents the dynamic output of the
unit with a static load.
0
10
20
30
40
50
60
70
80
0 100 200 300 400 500 600 700 800 900 1000
CV MODE
VOLTAG E
AMPERES