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. Open­Circuit
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

Description

CST-280,
220-230/460­575 Dinse

CST-280,
220-230/460­575 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,
208-230/400­460 Dinse

CST-280,
208-230/400­460 Tweco

14

10.2

9.9

7.6

10.2

6.9

6.5

4.8

CSA approval. 1P23M approval.

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 International­style recep tacles 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 International­style 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 turn­arounds, 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.