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OM-222 Page 11
SECTION 4 − INSTALLATION
4-1. Specifications
Model
Rated
Welding
Amp
Range DC
Maximum
Open-
Circuit
IP
Rating
Amperes Input at Rated Load Output, 50 or 60 Hz,
Three-Phase
Model
Welding
Output
R
ange
DC
Ci
rcu
it
Voltage DC
R
a
ti
ng
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
68
(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
71
(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
71
(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
4-2. 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.
NOTICE − Exceeding 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 =