Volt-Ampere Curves; Duty Cycle And Overheating - Miller Dynasty 300 SD Owner's Manual

4-2.

Volt-Ampere Curves

4-3.

Duty Cycle and Overheating

Overheating
OM-358 Page 12
250 A @ 40% Duty Cycle For AC
200 A @ 40% Duty Cycle For DC
4 Minutes Welding
0
Minutes
6 Minutes Resting
15
OR
Reduce Duty Cycle
Volt-ampere curves show mini-
mum and maximum voltage and
amperage output capabilities. Oth-
er settings fall between curves
shown.
SA-185 793 / SA-186 294
Duty Cycle is the percentage of 10
minutes that unit can weld at rated
load without overheating.
If unit overheats, output stops, a
Help message is displayed (see
Section 7-3), and fan runs. Wait for
unit to cool. Reduce amperage,
voltage, or duty cycle before weld-
ing.
Y Exceeding duty cycle can
damage unit and void
warranty.
A or V
sduty1 5/95 / SA-185 794