OM-222 Page 13
SECTION 3 – INSTALLATION

3-1. Specifications

Model Rated
Welding Amp Maximum
Open- IP Amperes Input at Rated Load Output, 50 or 60 Hz,
Three-Phase
Model Welding
Output Range DC Circuit
Voltage DC Rating 200 V 230 V 380 V 400 V 440 V 460 V 575 V KVA KW
300
Amp
300 A @
32 Volts
DC, 60%
Duty Cycle
15 – 395 72
(70) 21M 70
4.0* 61
3.6* 35
1.1* 33
1.1* 31
1.0* 31
3.1* 25
1.5* 24.5
1.3* 13.8
0.67*
450
Amp
450 A @
38 Volts
DC, 60%
Duty Cycle
20 – 590 72
(70) 21M 102
3.5* 89
3.1* 54
1.5* 51
1.4* 47
1.2* 45
1.5* 36
1.2* 35.5
1.2* 23.3
0.51*
650
Amp
650 A @
44 Volts
DC, 60%
Duty Cycle
50 – 850 72
(70) 21M –– 124
5.2* 75
1.7* 71
1.6* 65
1.5* 62
2.6* 50
2.1* 49.4
2.1* 36
0.58*
*While idling
( ) Indicates specification differences for CE models

3-2. Duty Cycle And Overheating

6 Minutes Welding 4 Minutes Resting
Duty Cycle is percentage of 10 min-
utes that unit can weld at rated load
without overheating.
If unit overheats, thermostat(s)
opens, output stops, and cooling
fan runs. Wait fifteen minutes for
unit to cool. Reduce amperage or
duty cycle before welding.
YExceeding duty cycle can
damage unit and void
warranty.
Overheating 0
15

A

OR
Reduce Duty Cycle
Minutes duty1 4/95 / Ref. SA-168 919
Example: 60% Duty Cycle =