.A complete Parts List is available at www.MillerWelds.com
4-2. Welding Power Source Duty Cycle And Overheating
500
450
400
| 350 | |
AMPERES | 300 | |
250 | ||
| ||
| 200 | |
WELD | 150 | |
100 | ||
| ||
| 50 |
10 | 20 | 30 | 40 |
% DUTY CYCLE
60% Duty Cycle At 200 Amperes
6 Minutes Welding | 4 Minutes Resting |
Overheating
0
15
Minutes
Duty Cycle is percentage of 10 minutes that unit can weld at rated load without overheating.
If unit overheats, Thermistor (T) opens, output stops, and cooling fan runs. Wait fifteen minutes for unit to cool. Reduce amperage or voltage, or duty cycle before welding.
NOTICE − Exceeding duty cycle can damage unit and void warranty.
50 | 60 | 70 | 80 90 100 |
40% Duty Cycle At 250 Amperes
4 Minutes Welding | 6 Minutes Resting |
A or V
OR
Reduce Duty Cycle
duty1 4/95 − 150
4-3. Volt-Ampere Curves
VOLTS
1 | 1 Normal |
35 | The |
| |
30 | normal minimum and maximum |
voltage and amperage output | |
| capabilities of the welding power |
25 | source. Curves of other settings fall | |
between the curves shown. | ||
|
20
15
10
5
0
0 | 100 | 200 | 300 | 400 |
AMPERES
ssb1.1 10/91 − 196 844 /
