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OM-216 244 Page 9
SECTION 3 − INTRODUCTION
3-1. Specifications
Amperage
Range in
Max. Open-
Circuit
RMS Amps Input at Rated Load
Output, 60 Hz 3-Phase at NEMA
Load Voltages and Class I Rating
Rated Welding Output
Range in
CC Mode
Circuit
Voltage
480 V 575 V
KVA KW
1000 A at 36 VDC,
3-Phase
27% Duty Cycle
50−1000A 70 VDC 55
(0.10*)
45
(0.08*)
46
(0.09*)
42
(0.04*)
*While idling
**See Section 4-2 for additional information.
.75 second Welding 3.00 seconds Resting
3-2. Duty Cycle And Overheating
Y Exceeding duty cycle can
damage unit and void
warranty.
Percent duty cycle = 1.7 times the
number of 1 second (1000ms)
loads/outputs per minute, without
overheating. The one second load
is the rated output.
If unit overheats, output stops. A
HLP 3 message (see Section 8-4)
is displayed, and cooling fan runs.
Wait fifteen minutes for unit to cool.
Reduce amperage or duty cycle be-
fore welding.
27% Duty Cycle
Overheating
0
15
A or V
OR
Reduce Duty Cycle
Minutes
sduty1 5/95 / SA-207 877
NUMBER OF STUDS IN ONE MINUTE
16
STUD SIZE
0.000
0.125
0.250
0.375
0.500
0.625
0.750
30 40 60