Miller Summit Arc 1000, Owner'S Manual

Page: 17 / 52

OM-2221 Page 13
4-4. Duty Cycle and Overheating
Duty Cycle is percentage of 10 minutes that unit
can weld at rated load without overheating.
If unit overheats, high temperature shutdown
light turns On, 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 − 181 560
Continuous Welding
100% Duty Cycle At 1000 Amperes
4-5. Volt-Ampere Curves
va_curve1 4/95 − 189 242 / 189 240 / 189 243 / 189 241
Volt-ampere curves show minimum
and maximum voltage and amper-
age output capabilities of unit.
Curves of other settings fall be-
tween curves shown.
C. CC Mode
D. CV Mode
DC Output AC Output
DC Output AC Output