Duty Cycle And Overheating - Miller XMT 350 FieldPro Owner's Manual

4-6. Duty Cycle And Overheating

500
425
400
350
300
250
200
150
100
10 20
15
Overheating
Notes
30 40 50 60 70 80 90 100
25
% DUTY CYCLE
60% Duty Cycle
6 Minutes Welding
0
Minutes
Duty Cycle is percentage of 10 minutes that unit can
weld at rated load without overheating.
If unit overheats, output stops, a Help message is dis-
played and cooling fan runs. Wait fifteen minutes for unit
to cool. Reduce amperage or voltage, or duty cycle be-
fore welding.
NOTICE − Exceeding duty cycle can damage unit and
void warranty.
THREE PHASE
OPERATION
4 Minutes Resting
15
OR
Reduce Duty Cycle
A or V
Ref. 219523-A
OM-282217 Page 13