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4-2. Specifications
A. 60 Hertz Models
Rated Output at 20% Duty
Cycle
TIG:
150 A at 15 VDC
(GTAW)
150 A at 15 VAC
Stick:
130 A at 25 VDC
(SMAW)
150 A at 25 VAC
* () While idling.
B. 50 Hertz Models
Rated Output at 20% Duty
Cycle
TIG:
150 A at 15 VDC
(GTAW)
150 A at 15 VAC
Stick:
130 A at 25 VDC
(SMAW)
150 A at 25 VAC
* () While idling.
4-3. Duty Cycle Chart
4-4. Volt-Ampere Curves
Welding Amperage Range
AC High
AC Low
DC
50−165
20−50
30−160
35−165
20−50
25−130
Welding Amperage Range
AC High
AC Low
DC
50−165
20−50
30−160
35−165
20−50
25−130
GTAW:
SMAW:
Max.
Rated Output
KVA
OCV
200 V−60 A (3.6)*
78
78
230V−52 A (3 0)*
230V−52 A (3.0)*
(0 64)*
(0.64)*
460 V−33 A (1.5)*
Max.
Rated Output
KVA
OCV
380 V−39 A (2.0)*
78
415 V−36 A (1.5)*
(0.64)*
20% Duty Cycle at 150 A AC/DC
20% Duty Cycle at 130 A DC, or
150 A AC
2 Minutes
8 Minutes
Welding
Resting
KW
Dimensions
12.0
5.4
H: 18 in (457 mm)
(0.3)*
(0 3)*
W: 13 in (330 mm)
W: 13 in (330 mm)
1
D: 25
/
in (648 mm)
2
KW
Dimensions
14.8
6.7
H: 18 in (457 mm)
(0.3)*
W: 13 in (330 mm)
1
D: 25
/
in (648 mm)
2
Duty cycle is percentage of 10
minutes that unit can weld at rated
load without overheating.
NOTICE − Exceeding duty cycle
can damage unit and void warranty.
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.
ssb1.1 10/91 − ST-157 625-B / ST-157 626-B
Net
Weight
140 lb
(64 kg)
(64 kg)
Net
Weight
140 lb
(64 kg)
(64 kg)
ST-157 648-A
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