Miller Syncrowave 351 - Installation; Specifications; Duty Cycle And Overheating

OM-354 Page 12
SECTION 3 – INSTALLATION
3-1. Specifications
Rated
Amperes Input at AC Balanced Rated Load Output,
50/60 Hz, Single-Phase
Welding
Output PFC**
200 V 220 V 230 V 380 V 415 V 460 V 575 V
KVA KW
Amperage
Range
Max
OCV
NEMA Class I
(60) – 300
No
PFC
130
(5.6*)
138
112
(4.9*)
80 73
57
(2.4*)
46
(1.9*)
26
(1.14*)
13.7
(0.42*)
Amperes, 32
Volts AC, 60%
Duty Cycle
With
PFC
112
(69*)
88
84
(60*)
51 47
45
(30*)
34
(24*)
20.6
(13.9*)
13.6
(0.59*)
3 – 430A 80
NEMA Class II
(40) – 350
No
PFC
151
(5.6*)
131
(4.9*)
67
(2.4*)
52
(1.9*)
30.3
(1.14*)
17.4
(0.42*)
Amperes, 34
Volts AC, 40%
Duty Cycle
With
PFC
131
(69*)
102
(60*)
53
(30*)
43
(24*)
24.6
(13.9*)
17.3
(0.59*)
3 – 430A 80
*While idling
**Power Factor Correction
6 Minutes Welding 4 Minutes Resting
4 Minutes Welding 6 Minutes Resting
3-2. Duty Cycle And Overheating
Duty Cycle is percentage of 10 min-
utes that unit can weld at rated load
without overheating.
If unit overheats, thermostat opens,
output stops, light goes on (CE
Models Only), and cooling fans run.
Wait fifteen minutes for unit to cool.
Reduce amperage or duty cycle be-
fore welding.
Y Exceeding duty cycle can
damage unit and void war-
ranty.
40% Duty Cycle At 350 Amperes (60 Hz Models Only)
Overheating
0
15
A
OR
Reduce Duty Cycle
Minutes
duty1 4/95 / SB-159 284
60% Duty Cycle At 300 Amperes