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OM-303 Page 11
4-2. Specifications
A. 60 Hertz Models
Rated Output at 20% Duty
Cycle
Welding Amperage Range
AC High AC Low DC
Max.
OCV
Rated Output KVA KW Dimensions Net
Weight
TIG:
(GTAW)
150 A at 15 VDC
150 A at 15 VAC 50−165 20−50 30−160
78
200 V−60 A (3.6)*
230V
−
52 A (3 0)
*
12.0
(0 64)
*
5.4
(0 3)
*
H: 18 in (457 mm)
W: 13 in (330 mm)
140 lb
(64 kg)
Stick:
(SMAW)
130 A at 25 VDC
150 A at 25 VAC 35−165 20−50 25−130
78
230V
−
52 A (3
.
0)*
460 V−33 A (1.5)*
(0
.
64)*
(0
.
3)*
W
:
13 i
n
(330
mm
)
D: 25
1
/
2
in (648 mm)
(64 kg)
* () While idling.
B. 50 Hertz Models
Rated Output at 20% Duty
Cycle
Welding Amperage Range
AC High AC Low DC
Max.
OCV
Rated Output KVA KW Dimensions Net
Weight
TIG:
(GTAW)
150 A at 15 VDC
150 A at 15 VAC
50−165 20−50 30−160
380 V−39 A (2.0)* 14.8 6.7 H: 18 in (457 mm) 140 lb
(64 kg)
Stick:
(SMAW)
130 A at 25 VDC
150 A at 25 VAC
35−165 20−50 25−130
78 415 V−36 A (1.5)* (0.64)* (0.3)* W: 13 in (330 mm)
D: 25
1
/
2
in (648 mm)
(64 kg)
* () While idling.
4-3. Duty Cycle Chart
2 Minutes
Welding
8 Minutes
Resting
Duty cycle is percentage of 10
minutes that unit can weld at rated
load without overheating.
Y Exceeding duty cycle can
damage unit and void
warranty.
GTAW: 20% Duty Cycle at 150 A AC/DC
SMAW: 20% Duty Cycle at 130 A DC, or
150 A AC
ST-157 648-A
4-4. Volt-Ampere Curves
ssb1.1 10/91 − ST-157 625-B / ST-157 626-B
Volt-ampere curves show minimum
and maximum voltage and amper-
age output capabilities of welding
power source. Curves of other set-
tings fall between curves shown.