Miller Electric XMT 350 VS User Manual

XMT®350/450 Series

Multiprocess Welding

Power Source

Issued July 2012 • Index No. DC/18.83

Lightweight, aerospace-grade aluminum case

offers protection with the benefit of reduced weight.

Lift-Arc™allows TIG starting without the use of

high-frequency. Starts the arc without contaminating
the weld with tungsten.

Adaptive Hot Start

™

increases the output amperage
at the start of a weld if necessary, eliminating
electrode sticking.

Inverter arc control technology provides greater
puddle control for superior 6010 Stick electrode
performance, and outstanding MIG weld performance.

Fan-On-Demand

™

cooling system operates only
when needed, reducing noise, energy use and the
amount of contaminants pulled through machine.

The Power of Blue®.

Wind Tunnel Technology™protects electrical

components and PC boards from contamination.

Processes

MIG (GMAW)/Pulsed MIG (GMAW-P)*
Stick (SMAW)
TIG (GTAW)
Flux-Cored (FCAW)
Air Carbon Arc Cutting and Gouging (CAC-A)

*XMT 350 CC/CV and 450 CC/CV with
required optional control; not available with
XMT 350 VS model.

Input Power 350: Requires 3- or 1-Phase Power,

450: Requires 3-Phase Power

Rated Output 350: 10– 38 V, 15– 425 A

450: 10 – 38 V, 15– 600 A

Net Weight 350: 80 lb. (36.3 kg)

450: 122 lb. (55.3 kg)

Heavy Industrial Applications

Construction

Shipbuilding

Railroad

Truck/Trailer Manufacturing

Fabrication

Repair Shops

Rental Fleets

Power Generation Plants

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

Original main power rectified parts are warranted for 5 years.

Gun warranted for 90 days, parts and labor.

Quick
Specs

XMT 350 CC/CV

XMT 450 CC/CV

XMT 350 VS

Line voltage compensation keeps welding output

constant even if input power varies by +/-10 percent.
Line voltage compensation further expands to an
amazing +37/-59 percent when operating on 460 VAC.

Process selector switch reduces the number of
control setup combi nations without reducing
any features.

Large, dual digital meters are easy to view and are
presettable to ease setting weld output.

XMT 350 Model Only

Auto-Line

™

Power Management

Technology allows for any input

voltage hook-up (208 – 575 V) with
no manual linking required, providing
convenience in any job setting. Ideal
solution for dirty or unreliable input
power. (450 model is manual link.)

Dinse- or Tweco-style weld
disconnects provide high-quality

weld cable connections. (450 model
utilizes studs.)

Miller Electric Mfg. Co.

An Illinois Tool Works Company
1635 West Spencer Street
Appleton, WI 54914 USA

Website

MillerWelds.com

Equipment Sales US and Canada

Phone: [phone]
FAX: [phone]
International Phone: [phone]
International FAX: [phone]

2

XMT®350/450 Performance Data

Model

XMT
350
CC/CV
and VS

XMT
450
CC/CV

Input
Power

Three­Phase

Single­Phase

Three­Phase

Rated Out put

350 A at 34 VDC,
60% Duty Cycle

300 A at 32 VDC,
60% Duty Cycle

450 A at 38 VDC,
100% Duty Cycle

Amperage
Range in
CC Mode

5–425 A

5–425 A

15–600 A

Voltage
Range in
CV Mode

10–38 V

10–38 V

10–38 V

Max. Open­Circuit
Voltage

75 VDC

75 VDC

90 VDC

Amps Input at Rated Load Output, 60 Hz
208 V 230 V 400 V 460 V 575 V KVA KW

40.4 36.1 20.6 17.8 14.1 14.2 13.6

60.8 54.6 29.7 24.5 19.9 11.7 11.2

— 51 32.1 27.6 24.4 22 18.9

Weight

80 lb.
(36.3 kg)

122 lb.
(55.3 kg)

Dimensions

H: 17 in. (432 mm)
W: 12.5 in. (318 mm)
D: 24 in. (610 mm)

H: 17.25 in. (438 mm)
W: 14.5 in. (368 mm)
D: 27.125 in. (689 mm)

XMT®350/450 Specifications

(Subject to change without notice.)

(XMT 450 CC/CV
is 3-Phase only.)

Certified by Canadian Standards Association to both the Canadian and U.S. Standards.

500

425
400

350

300

250

200

WELDING AMPERES

150

XMT 350 CC/CV and VS DUTY CYCLE CHART

3-PHASE OPERATION

1-PHASE OPERATION

6 AWG POWER CORD

8 AWG POWER CORD

100

10 15 20 25

30

% DUTY CYCLE

XMT 450 CC/CV DUTY CYCLE CHART

700

600

500

400

300

200

WELDING AMPERES

150

100

10 15 20 25 30 40 6050 70 80 90 100

3-PHASE OPERATION

% DUTY CYCLE

56%

10040 50 60 70 9080

3

1. Voltmeter

2. Remote Control Receptacle

3. Process Selector Switch (Rotary Switch)

4. Optional Gas Valve

5. Ammeter

6. Voltage/Amperage Adjustment Control

7. Arc Control (FCAW Setting for

Flux-Cored Welding)

8. Power On/Off Switch

XMT®350 VS Control Panel

XMT®350 CC/CV Control Panel

Additional Features

Low OCV Stick. A built-in, selectable
feature, that reduces the Stick mode
open-circuit voltage (OCV) to nearly
15 volts when the welding power source
is not in use. Eliminates the need for
add-on voltage reducers.

Note: VS model is available only with
Tweco-style weld cable disconnects. Tweco
cable connectors are not supplied with the
unit and must be ordered separately.

Optional 115 VAC auxiliary power is not
available on VS model.

Pulsed MIG (GMAW-P) capability is not
available on VS model.

Additional Features

Auto Remote Sense™enables unit to

automatically use remote control if
connected to remote control receptacle.

Low OCV Stick. A built-in, selectable
feature, that reduces the Stick mode
open-circuit voltage (OCV) to nearly
15 volts when the welding power source
is not in use. Eliminates the need for
add-on voltage reducers.

Dinse- or Tweco-style weld disconnects

provide high-quality weld cable connections.

Optional 115-VAC auxiliary power provides
10 amps of circuit-breaker-protected power
for water circulators, etc.

Pulsed MIG (GMAW-P) capabilities with
optional Optima

™

control reduces spatter
and distortion, allows better out-of-position
puddle control, and provides potential
reduction of fume particle emission.

1. Voltmeter

2. Process Selector Switch (Rotary Switch)

3. Optional Gas Valve

4. Ammeter

5. Voltage/Amperage Adjustment Control

6. Arc Control (FCAW Setting for

Flux-Cored Welding)

7. Power On/Off Switch

Note: VS model is equipped with Tweco-style
output connector.

Manufactured Under the
Following US Patents:
5,601,741 5,642,260 5,902,150
6,002,103 6,115,273 6,193,548
6,239,407 6,266,257 6,625,046
6,611,189 6,426,888
Other Patents Pending

1

2

3

4

5

6

7

Manufactured Under the
Following US Patents:
5,601,741 5,642,260 5,902,150
6,002,103 6,115,273 6,193,548
6,239,407 6,266,257 6,625,046
6,611,189 6,426,888
Other Patents Pending

1

2

3

4

5

6

CC

7

FCAW

8