Miller Electric Miller XMT 350 CC/CV Manual and Troubleshooting Guide
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4-5. Electrical Service Guide

NOTICE − INCORRECT INPUT POWER can damage this welding power source. Phase to ground voltage shall not exceed +10% of rated input voltage.

NOTICE − Actual input voltage should not be 10% less than minimum and/or 10% more than maximum input voltages listed in table. If actual input voltage is outside this range, output may not be be available.

Failure to follow these electrical service guide recommendations could create an electric shock or fire hazard. These recommenda- tions are for a dedicated branch circuit sized for the rated output and duty cycle of the welding power source.

 

 

 

Single-Phase

 

 

 

 

 

 

 

 

 

 

Input Voltage

208

230

 

400

 

460

575

 

 

 

 

 

 

 

 

Input Amperes At Rated Output

60.8

54.6

 

29.7

 

25.4

19.9

 

 

 

 

 

 

 

 

Max Recommended Standard Fuse Rating In Amperes 1

 

 

 

 

 

 

 

Time-Delay 2

70

60

35

 

30

25

Normal Operating 3

80

80

45

 

40

30

Min Input Conductor Size In AWG/Kcmil 4

8

8

 

10

 

12

12

Max Recommended Input Conductor Length In Feet (Meters)

72

89

 

176

 

140

219

(22)

(27)

 

(54)

 

(43)

(67)

 

 

 

 

 

 

 

 

 

 

 

Min Grounding Conductor Size In AWG/Kcmil 4

8

8

 

10

 

12

12

 

 

 

Three-Phase

 

 

 

 

 

 

 

 

 

 

Input Voltage

208

230

 

400

 

460

575

 

 

 

 

 

 

 

 

Input Amperes At Rated Output

40.4

36.1

 

20.6

 

17.8

14.1

 

 

 

 

 

 

 

 

Max Recommended Standard Fuse Rating In Amperes 1

 

 

 

 

 

 

 

Time-Delay 2

45

40

25

 

20

15

Normal Operating 3

60

50

30

 

25

20

Min Input Conductor Size In AWG/Kcmil 4

8

10

 

12

 

14

14

Max Recommended Input Conductor Length In Feet (Meters)

119

96

 

175

 

150

234

(36)

(29)

 

(53)

 

(46)

(71)

 

 

 

 

 

 

 

 

 

 

 

Min Grounding Conductor Size In AWG/Kcmil 4

10

10

 

12

 

14

14

Reference: 2005 National Electrical Code (NEC) (including article 630)

1Consult factory for circuit breaker applications.

2“Time-Delay” fuses are UL class “RK5” .

3“Normal Operating” (general purpose - no intentional delay) fuses are UL class “K5” (up to and including 60 amp), and UL class “H” (65 amp and above).

4Conductor data in this section specifies conductor size (excluding flexible cord or cable) between the panelboard and the equipment per NEC Table 310.16. If a flexible cord or cable is used, minimum conductor size may increase. See NEC Table 400.5(A) for flexible cord and cable requirements.

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Contents OM-2247212 857N ProcessesDescription File MultiprocessFrom Miller to You Table of Contents Page Symbol Usage Arc Welding HazardsElectric Shock can kill HOT Parts can cause severe burnsFumes and Gases can be hazardous ARC Rays can burn eyes and skinWelding can cause fire or explosion Flying Metal or Dirt can injure eyesWelding Wire can cause injury Fire or Explosion hazardFalling Unit can cause injury Moving Parts can cause injuryPrincipal Safety Standards California Proposition 65 WarningsEMF Information About Implanted Medical DevicesSymboles utilisés UNE Décharge Électrique peut entraîner la mortLE Soudage peut provoquer un in cendie ou une explosion DES Pièces Chaudes peuvent provoquer des brûlures gravesLES Fumées ET LES GAZ peuvent être dangereux LE Bruit peut endommager l’ouïe LES Bouteilles peuvent exploser si elles sont endommagéesRisque D’INCENDIE OU D’EXPLO- Sion LA Chute DE L’APPAREIL peut blesserLE Soudage À L’ARC risque de provoquer des interférences Proposition californienne 65 AvertissementsLES Fils DE Soudage peuvent provoquer des blessures En ce qui concerne les implants médicaux Principales normes de sécuritéInformation EMF OM-2247 Specifications CC ModeCV Mode − IntroductionDuty Cycle And Overheating 60% Duty CycleMinutes Welding Minutes Resting OverheatingSelecting a Location − InstallationDimensions And Weight Connecting 1-Phase Input Power EarthGround Tools Needed= GND/PE Earth Ground Tools Needed Connecting 3-Phase Input PowerFor Three-Phase Operation Electrical Service Guide Single-Phase Input VoltageInput Amperes At Rated Output Min Grounding Conductor Size In AWG/KcmilWeld Output Receptacles And Selecting Cable Sizes 150 ft 200 ft 250 ftPut terminals Do not use worn, dam Aged, undersizedRemote 14 Receptacle Information Socket InformationGas flow starts with remote contac- tor on Optional Gas Valve Operation And Shielding Gas ConnectionOperation Front Panel Controls Power Switch− Operation Mode Switch Settings Mode Meter Reading At Idle Meter Reading While WeldingMode Switch Setting Process Output On/Off Control Meter FunctionsLow OCV Stick Lift-Arc TIG ProcedureStick Start Procedure Blowing Out Inside Of Unit − Maintenance & TroubleshootingDo not remove case when blowing out inside of unit Troubleshooting Voltmeter/Ammeter Help DisplaysOM-2247 − Electrical Diagram Circuit Diagram211 328-F Section −8 − Parts List Parts AssemblyPLG1 PLG13 C6,7 214 Wrapper/Label Location French Units View of RH Windtunnel Label 6 located on Top of WindtunnelMaterial Thickness Gauge Work like a Pro Support ServiceYour distributor also gives To locate a Distributor or Service Agency visit Miller Electric Mfg. CoFor assistance in filing or settling claims, contact Your distributor and/or equipment manufacturer’s

XMT 350 CC/CV specifications

The Miller Electric XMT 350 CC/CV is a versatile welding power source designed to meet the demands of various welding applications. Known for its robust performance and advanced features, the XMT 350 is a favorite among professional welders and contractors.

One of the standout features of the XMT 350 is its dual voltage capability, allowing for operation on both standard 230V and 460V power sources. This flexibility makes it an ideal choice for a wide range of job sites and ensures compatibility with various input power situations. The XMT 350 also offers Constant Current (CC) and Constant Voltage (CV) modes, making it suitable for stick, TIG, and MIG welding processes.

Another remarkable characteristic of the XMT 350 is its lightweight and compact design. Weighing only 66 pounds, this welding machine is easy to transport, making it a great option for fieldwork. The durable construction ensures that it can withstand the rigors of job sites while providing reliable performance over time.

The XMT 350 incorporates Miller’s Auto-Set technology, which simplifies the setup process for the user. By automatically adjusting the output parameters based on the material and thickness being welded, Auto-Set helps to optimize welding performance while reducing guesswork. This innovation is particularly beneficial for those who may be less experienced or those looking to improve their efficiency.

Moreover, the XMT 350 features an advanced software system that enhances the machine's performance. The built-in Digital Meter provides accurate readings of voltage and amperage, allowing welders to make precise adjustments for optimal results. This capability is especially valuable for achieving high-quality welds in various materials and thicknesses.

The XMT 350 is also equipped with a number of safety features, including a Thermal Overload Protection system, which prevents overheating by cutting power to the machine when it gets too hot. This ensures the longevity of the unit and protects welders from potential hazards during operation.

In conclusion, the Miller Electric XMT 350 CC/CV is a powerful, versatile, and user-friendly welding machine that caters to various welding applications. Its advanced technologies, including Auto-Set, dual voltage capability, and safety features, make it a reliable choice for both experienced welders and those just starting in the field. With the XMT 350, welders can expect exceptional performance and results across diverse welding tasks.
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