Duty Cycle And Overheating − 60 Hz Operation; Ac Generator Power Curve - Miller Electric Big Blue 400 PX Owner's Manual

4-8. Duty Cycle And Overheating − 60 Hz Operation
1000
800
600
500
400
300
250
200
150
100
10

4-9. AC Generator Power Curve

2 40 120
2 00 100
80
1 60
1 20
60
80 40
40 20
0
0
0
0
15 20 25 30
% DUTY CYCLE
20 40 60
AC AMPERES IN
10 20 30
A C A MPERES IN 22 0V MODE
CC
CV
40 50 60 80
80 100 120
110 V MODE
40 50 60
100% Duty Cycle At 250 Amperes
Continuous Welding
Duty Cycle is percentage of 10 min-
utes that unit can weld at rated load
without overheating.
NOTICE − Exceeding duty cycle
can damage unit and void warranty.
100
The ac power curve shows the gen-
erator power in amperes.
140
70
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