Filter
Top Products
OM-206 Page 10
2-3. Duty Cycle And Overheating
rduty1 5/95 – SB-121 591-B / SB-144 507-B / ST-157 356-B
Duty Cycle is percentage of 10 min-
utes that unit can weld at rated load
without overheating.
Y Exceeding duty cycle can
damage unit and void
warranty.
0
15
minutes
When overheated, thermostat
opens, output stops, and cooling
fan keeps running.
Let fan run for
15 minutes.
Start welding.
Overheating
A. 152 Model B. 175 Model
Continuous Welding
100% Duty Cycle At 120 Amperes For 152
Models; 140 Amperes For 175 Models