Duty Cycle And Overheating; Volt-Ampere Curves - Miller Dialarc 250 AC Manuel D'utilisation

2-2. Duty Cycle And Overheating

30% Duty Cycle At 250 Amperes AC
3 Minutes Welding
50% Duty Cycle At 200 Amperes DC
5 Minutes Welding
Overheating

2-3. Volt-Ampere Curves

A. DC Mode
OM-321 Page 10
7 Minutes Resting
5 Minutes Resting
0
15
Minutes
Duty Cycle is percentage of 10 min-
utes that unit can weld at rated load
without overheating.
Y Exceeding duty cycle can
damage unit
warranty.
A
OR
Reduce Duty Cycle
rduty1 5/95 – 002 120-B
The volt-ampere curves show the
minimum and maximum voltage
and amperage output capabilities of
the welding power source. Curves
of other settings fall between the
curves shown.
B. AC Mode
ssb1.1 10/91 – 002 696-A / 002 689-A
and void