2
Welding
Mode
Stick
(SMAW)
TIG
(GTAW)
Rated Output
280 A at 31.2 V,
35% Duty Cycle
200 A at 28 V,
100% Duty Cycle
200 A at 28 V,
50% Duty Cycle*
150 A at 26 V,
100% Duty Cycle*
Welding
Amperage
Range
5 – 280 A
5 – 200 A
Input
Power
3-Phase
1-Phase
Max. Open-
Circuit
Voltage
77 VDC
Net
Weight
41 lb
(18.6 kg)
Specifications
(Subject to change without notice.)
Control Panel
Amps Input at Rated Load Output, 50/60 Hz,
208 V 220 V
230 V
400 V 440 V 460 V 575 V
—
35
34.2
—
—
17.8
14.7
—
23.3
22.5
—
—
11.7
9.7
—
43.9
43
—
—
—
—
—
32.7
32
—
—
—
—
Dimensions
H: 13-1/2 in
(343 mm)
W: 7-1/2 in
(191 mm)
D: 18 in
(457 mm)
*
Output ratings on 230 V single-phase are reduced to comply with CSA current limitation on input power cable.
MILLER ELECTRIC MFG. CO. APPLETON, WI
POWER
PROCESS SELECT
AMP ADJUST
OFF
ON
125 150
100
175
75
50
25
5
225
250
280
200
CST 280
S
TI
CK
EX
X18
S
T
IC
K
E
X
X
1
0
S
O
FT
STIFF
SO
F
T
S
T
IF
F
LIF
T-
AR
C
™
T
IG
1
2
3
4
5
1.
Output Light
2.
On/Off Switch
3.
Weld Process Selector Switch
4.
Overtemp Light
5.
Amperage Adjustment Control (5 – 280 Amps)
Performance Data
300
250
200
150
100
50
0
10
20
30
40
50
60
70
80
90
100
100
90
80
70
XX18
Setpoint
150 Amps
XX18
Soft
XX18 Stiff,
XX10 Soft
XX10 Stiff
TIG
TIG
XX10
60
50
40
30
20
10
0
0
50
100
150
200
250
300
% DUTY CYCLE
AMPERAGE
DUTY CYCLE CHART
VOLT/AMP CURVE AT 150 AMPS
OUTPUT AMPERES
VOLTAGE
3-Phase Operation
1-Phase Operation
CSA approval. 1P23M approval.
Description
CST-280,
220-230/460-
575 Dinse
CST-280,
220-230/460-
575 Tweco
KVA
14.6
9.6
10.1
7.3
KW
10.2
6.4
6.6
4.6
Stick
(SMAW)
TIG
(GTAW)
280 A at 31.2 V,
35% Duty Cycle
200 A at 28 V,
100% Duty Cycle
200 A at 28 V,
50% Duty Cycle*
150 A at 26 V,
100% Duty Cycle*
5 – 280 A
5 – 200 A
3-Phase
1-Phase
67 VDC
41 lb
(18.6 kg)
36
33
22.8
19.8
18
17.5
—
23.5
23
22.8
13.5
12
12.7
—
43.9
43.3
43
—
—
—
—
35
—
32.9
—
—
—
—
H: 13-1/2 in
(343 mm)
W: 7-1/2 in
(191 mm)
D: 18 in
(457 mm)
CST-280,
208-230/400-
460 Dinse
CST-280,
208-230/400-
460 Tweco
14
10.2
9.9
7.6
10.2
6.9
6.5
4.8
