Miller Electric UNITOR UWI 150 Auto-Line, Owner'S Manual, Page: 18 / 28

OM-220 340 Page 14
4-4. Duty Cycle And Overheating
208 608-C
Duty Cycle is percentage of 10 min-
utes that unit can weld at rated load
without overheating.
If unit overheats, output stops, the
Overtemperature Light comes On,
and the cooling fan runs. Wait fif-
teen minutes for unit to cool. Re-
duce amperage or duty cycle be-
fore starting to weld again.
NOTICE − Exceeding duty cycle
can damage unit and void warranty.
% Duty Cycle
Output Amperes
10
100
0
50
100
150
200
250
Stick (230V)
Stick (115V)
TIG (115 &230V)
4-5. Volt-Ampere Curves
Volt-ampere curves show minimum and maximum voltage and amperage output capabilities
of welding power source. Curves of other settings fall between curves shown.
223 288-A
80
60
40
20
0
0
50 100
150
200
TIG/Stick Max
TIG Min
Stick Min
115 VAC Input
80
60
40
20
0
0
20 40
60
80 100 120 140
160 180 200
TIG/Stick Max
TIG Min
Stick Min
230 VAC Input
Notes