Duty Cycle And Overheating; Cutting Speed - Miller Electric Spectrum 2050 Owner's Manual

2-2. Duty Cycle and Overheating

Three-Phase Input Power:
60% Duty Cycle
6 Minutes Cutting
Overheating

2-3. Cutting Speed

OM-2220 Page 10
4 Minutes Resting
0
15
Minutes
Duty Cycle is percentage of 10 min-
utes that unit can cut 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 cutting.
Y Exceeding duty cycle can
Single-Phase Input Power:
50% Duty Cycle
5 Minutes Cutting
A
OR
Reduce Duty Cycle
The cutting speed curve shows the
recommended maximum cutting
speed capabilities of the power
source and torch for mild steel,
aluminum and stainless steel of
various thickness.
Y Exceeding
Cutting speed is approximately
10 inches per minute at 0.875 in
(22 mm) mild steel thickness at
max setting/tip saver mode.
damage unit and void war-
ranty.
5 Minutes Resting
duty1 4/95
recommended
cutting speeds will cause
rapid erosion of the tip and
electrode.