Miller Electric CST 280 User Manual

CST		™	280		Issued Feb. 2008 • Index No. DC/29.55
					Stick/TIG Welding
					Power Source
Quick		Industrial Applications		Processes	Input Power Requires 3- or 1-Phase Power
		Power Plant Construction		Stick (SMAW)	Amperage Range 5 – 280 A
		Petrochemical Construction		TIG (GTAW) Lift-Arc
Specs		Maintenance and Repair			Max. Open-Circuit Voltage 79 V
		Shipbuilding
					Weight 41 lb (18.6 kg)

The Power of Blue®.

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.

Lift-Arc™ start provides TIG arc starting without the use of high frequency.

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.

Portable in the shop or at the job site — at 41 lb the CST 280 is easily moved from location to location.

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.

Power source is warranted for 3 years, parts and labor.

Original main power rectified parts are warranted for 5 years.

Miller Electric Mfg. Co.	International Headquarters	Web Site
An Illinois Tool Works Company	Phone: [phone]	www.MillerWelds.com
1635 West Spencer Street	USA FAX: [phone]
Appleton, WI 54914 USA	Canadian FAX: [phone]
	International FAX: [phone]

Specifications (Subject to change without notice.)

				Welding	Max. Open-
	Welding	Input		Amperage	Circuit	Amps Input at Rated Load Output, 50/60 Hz,									Dimensions	Net
Description	Mode	Power	Rated Output	Range	Voltage	208 V	220 V	230 V	400 V	440 V	460 V	575 V	KVA	KW		Weight
CST-280,	Stick	3-Phase	280 A at 31.2 V,	5 – 280 A	77 VDC	—	35	34.2	—	—	17.8	14.7	14.6	10.2	H: 13-1/2 in	41 lb
220-230/460-	(SMAW)		35% Duty Cycle												(343 mm)	(18.6 kg)
575 Dinse															W: 7-1/2 in
	TIG		200 A at 28 V,			—	23.3	22.5	—	—	11.7	9.7	9.6	6.4
															(191 mm)
CST-280,	(GTAW)		100% Duty Cycle
															D: 18 in
220-230/460-		1-Phase	200 A at 28 V,	5 – 200 A		—	43.9	43	—	—	—	—	10.1	6.6
															(457 mm)
575 Tweco			50% Duty Cycle*
			150 A at 26 V,			—	32.7	32	—	—	—	—	7.3	4.6
			100% Duty Cycle*
CST-280,	Stick	3-Phase	280 A at 31.2 V,	5 – 280 A	67 VDC	36	33	22.8	19.8	18	17.5	—	14	10.2	H: 13-1/2 in	41 lb
208-230/400-	(SMAW)		35% Duty Cycle												(343 mm)	(18.6 kg)
460 Dinse	TIG		200 A at 28 V,			23.5	23	22.8	13.5	12	12.7	—	10.2	6.9	W: 7-1/2 in
															(191 mm)
CST-280,	(GTAW)		100% Duty Cycle
															D: 18 in
208-230/400-		1-Phase	200 A at 28 V,	5 – 200 A		43.9	43.3	43	—	—	—	—	9.9	6.5
															(457 mm)
460 Tweco			50% Duty Cycle*
			150 A at 26 V,			35	—	32.9	—	—	—	—	7.6	4.8
			100% Duty Cycle*

*Output ratings on 230 V single-phase are reduced to comply with CSA current limitation on input power cable.

CSA approval. 1P23M approval.

Control Panel

1. Output Light

1

2.On/Off Switch

3.Weld Process Selector Switch

4.Overtemp Light

5.Amperage Adjustment Control (5 – 280 Amps)

2

3

Performance Data

DUTY CYCLE CHART

	300
	3-Phase Operation
	250
AMPERES	200		1-Phase Operation
	150
OUTPUT	100
	50
	0
	10	20	30	40	50	60	70	80	90	100

% DUTY CYCLE

OFF

ON

POWER

4

150

X1

8

X

200

E

STIFF

K

IC

S

75

S

T

T

S

5

F

O

T

T C

F

I

S

K

225

T

S

E

50

X

G

I

T

X

™

C

F

I

1

R

F

0

250

A

F

-

T

I

L

280

PROCESS SELECT

AMP ADJUST

CST 280

MILLER ELECTRIC MFG. CO. APPLETON, WI

VOLT/AMP CURVE AT 150 AMPS

	100
	90
	80
	70			Setpoint
VOLTAGE	60		XX18	150 Amps
	50		TIG
	40		XX10
	30
					XX18
	20				Soft
	10			TIG	XX18 Stiff,
	0				XX10 Soft	XX10 Stiff
	0	50	100	150	200	250	300
				AMPERAGE

2