Miller Electric CST 280 User manual

Processes
Stick (SMAW)
TIG (GTAW) Lift-Arc
Input Power Requires 3- or 1-Phase Power
Amperage Range 5 – 280 A
Max. Open-Circuit Voltage 79 V
Weight 41 lb (18.6 kg)
Industrial Applications
Power Plant Construction
Petrochemical Construction
Maintenance and Repair
Shipbuilding
CST™280 Stick/TIG Welding
Power Source
Issued Feb. 2008 • Index No. DC/29.55
The Power of Blue® .
Miller Electric Mfg. Co.
An Illinois Tool Works Company
1635 West Spencer Street
Appleton, WI 54914 USA
Web Site
www.MillerWelds.com
International Headquarters
Phone: [phone]
USA FAX: [phone]
Canadian FAX: [phone]
International FAX: [phone]
Portable in the shop or at
the job site — at 41 lb the
CST 280 is easily moved
from location to location.
Superior Stick arc performance
even on the difficult-to-run
electrodes like E6010.
Adaptive Hot Start™for Stick
arc starts automatically
increases the output amperage
at the start of a weld should
the start require it. Prevents
the electrode from sticking
and creating an inclusion.
Remote amperage control
provided through 14-pin
receptacle on front of the
machine. This permits use
of standard remote
amperage control devices.
Tweco®or Dinse-style
connectors are available
on the CST 280.
6 ft power cable included.
Easy To Install with a new
switch on the outside of the
package, the machine can be
changed between low and high
input voltage ranges. Also,
since the switch is on the
back, input voltages can be
changed without removal
from inverter racks.
Optional 4- or 8-pack racks
are available for multiple
operator applications.
These are commonly used
in construction and shipyard
applications. All CST controls
including the power switch
are located on front of the
machine for easy access.
Power source is warranted for 3 years, parts and labor.
Original main power rectified parts are warranted for 5 years.
Quick
Specs
Lift-Arc™start provides TIG
arc starting without the use of
high frequency.

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
T
I
C
K
E
X
X
1
8
S
T
I
C
K
E
X
X
1
0
S
O
F
T
S
T
I
F
F
S
O
F
T
S
T
I
F
F
L
I
F
T
-
A
R
C
™
T
I
G
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

3
TIG (GTAW) Torches
Weldcraft®TIG Torches
The Weldcraft line of TIG torches complements
the most popular TIG power source line
available today. The Weldcraft torch line
includes both air-cooled and water-cooled
models. Available with genuine Weldcraft parts.
#WP-17V-12-2
150 A, 12 ft (3.7 m)
air-cooled torch with valve, two-piece cable.
#WP-17V-25-2 150 A, 25 ft (7.6 m)
torch with valve, two-piece cable.
#WP-26V-12-2 200 A, 12 ft (3.7 m)
air-cooled torch with valve
#WP-26V-25-2 200 A, 25 ft (7.6 m)
air-cooled torch with valve
These two-cable TIG torches require the installation of a
Dinse Connector (042418) or Tweco Style Connector
(195115) depending on the CST Model Connector Type.
Remote Controls
RCC-14 Remote Contactor and Current
Control* #151 086 14-pin plug
Side-to-side rotary-motion fingertip control
fastens to TIG torch using two Velcro®
straps. Includes 28 ft (8.5 m) control cord.
Great for production or contractors that
need quick ramp-up.
RCCS-14 Remote Contactor and Current
Control* #043 688
Up-and-down rotary-motion fingertip
control fastens to TIG torch using two
Velcro®straps. Includes 28 ft (8.5 m)
control cord. Great for applications that
require a finer amperage control.
RFCS-14 Foot Control* #043 554
Foot pedal provides remote current and
contactor control. Includes 20 ft (6 m) cord
and 14-pin plug.
RHC-14 Hand Control* #129 340
Miniature hand control for remote current
and contactor control. Dimensions: 4 x 4 x
3-1/4 in (102 x 102 x 82 mm). Includes
20 ft (6 m) cord and 14-pin plug.
RFCS-14 HD Foot Control* #194 744
For all Miller solid-state power sources
after serial number JK674521. This new
design increases stability with a larger
base, and durability with a heavier cord.
Maximum flexibility is accomplished with a
reconfigurable cord that can exit the front,
back or either side of the pedal. Foot pedal
provides remote current and contactor
control. Includes 20 ft (6 m) cord and
14-pin plug.
*Note: The remote controls provide amperage control
only on the CST 280, no remote contactor control.
Genuine Miller Accessories
Cable Connectors and Adapters
Note: The Dinse version of the CST 280 includes one
set of male connectors. The tweco version does not.
International-Style Connector
#042 418 50 mm
Accepts #1 or #2 AWG cable size. Required
if male plugs shipped with power source must
be replaced or if additional plugs are needed.
Kit includes one International-style male
plug which attaches to the work and/or
weld cables and plugs into the International-
style receptacles on the power source.
Extension Kit for International-Style
Cable Connectors #042 419 50 mm
Accepts #1 or #2 AWG size cable. Used to
adapt or extend weld and/or work cables.
Kit includes one male International-style
plug and one in-line female International-
style receptacle.
International/Tweco®
Adapter #042 465
A one-piece adapter
which has an
International-style male
plug (to power source)
on one end and a female Tweco receptacle
(for weld cable connection) on other end.
International/Cam-Lok
Adapter #042 466
A one-piece adapter
which has an
International-style
male plug (to power source) on one end
and a Cam-Lok receptacle (for weld cable
connection) on other end.
Tweco/Dinse Adapter
#195 116
A one-piece adapter
which has a Tweco-
style male plug (to
power source) on one end and a female
Dinse or International-style receptacle (for
weld cable connection) on other end.
Tweco-Style
Connector
50 mm
#195 115
Accepts #1 or
#2 AWG cable
size. Kit includes one Tweco-style male plug
which attaches to the work and/or weld
cables and plugs into the receptacle on
the power source.

Litho in USA
Distributed by:
Power Source and Options Stock No. Description Qty. Price
CST™280 w/ Dinse-style connectors* #907 244 220-230/460–575 VAC, 50/60 Hz
CST™280 w/ Tweco-style connectors* #907 244-01-1 220-230/460–575 VAC, 50/60 Hz
CST™280 w/ Dinse-style connectors* #907 251 208-230/400–460 VAC, 50/60 Hz
CST™280 w/ Tweco-style connectors* #907 251-01-1 208-230/400–460 VAC, 50/60 Hz
Power Source Racks and Options
CST™280 Rack w/ Dinse-style connectors* #907 245 Rack with 4 CST 280, 220/230/460/575 VAC (Includes 25 A fuses for 460 V)
CST™280 Rack w/ Tweco-style connectors* #907 247 Rack with 4 CST 280, 220/230/460/575 VAC (Includes 25 A fuses for 460 V)
CST™280 Rack w/ Tweco-style connectors* #907 365 Rack with 8 CST 280, 220/230/460/575 VAC (Includes 25 A fuses for 460 V)
Running Gear for Rack #195 114 For 4-Pack Rack
#195 436 For 8-Pack Rack
Fuse #199 795 30 amp fuse for 220 or 230-volt input (Order 12 per 4-pack rack)
#212 541 20 amp fuse for 575-volt input (Order 12 per 4-pack rack)
TIG Accessories
Weldcraft®TIG Torches See page 3
Remote Controls
RHC-14 Remote Control #129 340 Remote current hand control
RCC-14 #151 086 Remote current side-to-side rotary control
RCCS-14 #043 688 Remote current up and down rotary control
RFCS-14 #043 554 Remote current foot pedal control
RFCS-14 HD #194 744 Remote current foot pedal control with 20 ft (6 m) cord and 14-pin plug
Extension Cord for Remote Controls #122 973 25 ft (7.6 m)
#122 974 50 ft (15.2 m)
#122 975 75 ft (22.8 m)
Cable Connectors and Adapters
International-Style Connector #042 418 50 mm
Extension Kit for International-Style #042 419 50 mm
International/Tweco®Adapter #042 465 A one-piece adapter with International-style male plug
International/Cam-Lok Adapter #042 466 A one-piece adapter with International-style male plug
Tweco-style Connectors
Tweco-style Connector #195 115 50 mm
Adapter, Tweco/International #195 116 One-piece adapter with Tweco-style male connector and international-style female connector
Date: Total Quoted Price:
*The Dinse version of the CST 280 includes one set of male connectors. The Tweco version does not.
Ordering Information
The rack provides a simple means of
protecting and transporting welding power
sources for construction, power plant turn-
arounds, and shipbuilding applications.
The CST™280 Rack’s low weight (340 lb fully
loaded) enables use of elevators to move the rack.
Top cover to protect the machines from
falling debris.
Meets NEC requirements with appropriate fuses.
Lift truck side and end fork pockets.
Lifting eye simplifies transportation using
crane or overhead lifting device.
One main disconnect box with fused circuit
breaker switches for each machine.
Common output ground connection
(for same polarity use only).
CSTs can be paralleled for Air Carbon Arc cutting.
Running gear (optional).
CST™280 Rack (See Index No. DC/18.82 for additional information.)
Power Source
CST 280
Input Power to Rack
220/230/460/575 VAC, 60 Hz,
3-Phase
Capacity
4
8
Net Weight
355 lb
(161 kg)
640 lb
(290 kg)
Dimensions
H: 50-3/4 in (1289 mm)
W: 25-1/2 in (648 mm)
D: 26-1/2 in (673 mm)
H: 50-3/4 in (1289 mm)
W: 46 in (1165 mm)
D: 26-1/2 in (673 mm)
CST Rack Specifications (Subject to change without notice.)
Shown with
optional
running gear.