Tweco 6045 Excel Arc - Manual (Page 18)

EXCEL ARC 6045 INTRODUCTION
Manual 0-5213 2-4 August 26, 2011
2.06 Functional Block Diagram
System Controls
Main
Contactor
Main Power
Amplifier
(XFMR)
Rectifier
Current
Measuring
Device
Welding Output
Power
CC/CV
Aux. Power
Accessories /
Features
User Controls
Cooling
Welding
Performance
Control
.
Input
Output
CC/CV/Neg
Connections
Output
Art# A-10882
Figure 2-2: Functional Block Diagram for Excel Arc ® 6045
2.07 Duty Cycle
Duty cycle is the percentage of each ten-minute period of time that the welding machine may be operated under rated
load conditions. For example, a duty cycle of 60% means that the machine can be operated at rated load for an average
of 6 minutes of each 10 minute period of operation. During the remaining 4 minutes, the machine must idle to permit
proper cooling. Figure 2-3 enables the operator to determine the duty cycle at various welding amperages.
750
650
550
450
40 50 60 80 100
% Duty Cycle
W
eld Amperes
Art# A-10881
Figure 2-3: Duty Cycle Chart