Volt-Ampere Curves; Duty Cycle - MAC TOOLS MW250 Owner's Manual

2-1. Volt-Ampere Curves

2-2. Duty Cycle

CAUTION
WELDING LONGER THAN RATED DUTY CYCLE can damage unit or gun and void warranty.
•
Do not weld at rated load longer than shown below.
0
10
Minutes
Figure 2-1. Volt-Ampere Curves
Definition
Duty Cycle is percentage of 10
minutes that unit or gun can
weld at rated load without over-
heating.
Chart
Figure 2-2. Duty Cycle
The volt-ampere curves show the
minimum and maximum voltage
and amperage output capabilities of
the welding power source. Curves
of other settings fall between the
curves shown.
UNIT
60% Duty Cycle At 200 Amperes
6 Minutes Welding
GUN
60% Duty Cycle At 200 Amperes Using CO
6 minutes Welding
GUN
60% Duty Cycle At 180 Amperes Using Mixed Gas
6 minutes Welding
ssb1.1 10/91 − SB-049 424-D
wfwarn8.2 8/93
4 Minutes Resting
2
4 minutes Resting
4 minutes Resting
sb1.3 8/93 − SB-150 215
OM-154 501 Page 2