Volt-Ampere Curves; Duty Cycle And Overheating - Miller Electric Subarc DC 1000 Owner's Manual

4-4. Volt-Ampere Curves

A. CC Mode

4-5. Duty Cycle And Overheating

Overheating
AMPERES
100% Duty Cycle
Continuous Welding
0
Minutes
B. CV Mode
15
OR
Reduce Duty Cycle
Volt-ampere curves show
mum and maximum voltage and
amperage output capabilities of
unit. Curves of other settings fall be-
tween curves shown.
AMPERES
va_curve1 − 4/95 − ST-199 986-A / ST-190 973
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.
A/V
duty1 4/95 / SA-191 157-B
OM-229 253 Page 15
mini-