Miller Thunderbolt 225 - Operation and Controls; Controls Overview; Duty Cycle and Volt-Ampere Curves

OM-116 Page 5
SECTION 3 – OPERATION
3-1. Controls
Ref. ST-155 574 / Ref. SC-107 516-F
1 Amperage Control
2 Amperage Range Indicator
3 Electrode (30–150 A) Weld
Output Receptacle
4 Electrode (40–225 A) Weld
Output Receptacle
When welding below 150 amps,
use 30–150 A receptacle.
5 Work Weld Output Receptacle
6 Power Switch
1
2
6
3
4
5
2 Minutes Welding 8 Minutes Resting
3-2. Duty Cycle Chart And Volt-Ampere Curves
rduty1 5/95 – ST-001 836-A / ST-001 844-A
Duty Cycle is percentage of 10 minutes
that unit can weld at rated load without
overheating.
Y 20% Duty Cycle at 225 Amperes. Ex-
ceeding duty cycle can damage unit
and void warranty.
The volt-ampere curves show the minimum and maximum
voltage and amperage output capabilities. Curves of other
settings fall between the curves shown.