Miller Electric 280 NT manual Duty Cycle, TIG Mode Volt-Ampere Curves

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. A complete Parts List is available at www.MillerWelds.com

4-7. Duty Cycle

100% Duty Cycle at 280 Amperes DC/CC

Continuous Welding

Duty cycle is the percentage of 10 minutes that unit can weld at rated load without overheating.

NOTICE − Exceeding duty cycle can damage unit and void warranty.

325

MIG/FCAW

300

WELD AMPERES

275

STICK

250

225

200

175

150

100

% DUTY CYCLE

Ref. 207 925

4-8. TIG Mode Volt-Ampere Curves

DC VOLTS

	50
	45
	40	3600RPM Max
	35	3600RPM Max
	35	3000RPM Max
	30	3000RPM Max
	30

15 Min

0	100	200	300	400
		DC AMPERES

The volt-ampere curves show the minimum and maximum voltage and amperage output capabilities of the welding generator. Curves of other settings fall between the curves shown.

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Contents OM-4430217 243R ProcessesDescription File Engine DriveFrom Miller to You Table of Contents − Maintenance & Troubleshooting Symbol Usage Arc Welding HazardsElectric Shock can kill HOT Parts can cause severe burnsFumes and Gases can be hazardous Buildup of GAS can injure or killARC Rays can burn eyes and skin Welding can cause fire or explosionEngine Hazards Compressed Air HazardsWelding Wire can cause injury HOT Parts can cause burns and injuryFire or Explosion hazard Falling Unit can cause injuryPrincipal Safety Standards California Proposition 65 WarningsEMF Information Radiation can cause interferenceSignification des symboles − Consignes DE Sécurité − Lire Avant UtilisationUN Choc Électrique peut tuer Indique des instructions spécifiquesLE Soudage peut provoquer un in cendie ou une explosion DES Pièces Chaudes peuvent provoquer des brûlures gravesLES Fumées ET LES GAZ peuvent être dangereux DES Organes Mobiles peuvent pro voquer des blessures LE Bruit peut affecter l’ouïe’EXPLOSION DE LA Batterie peu Risque D’INCENDIE OU D’EXPLO- Sion LA Chaleur DU Moteur peut pro- voquer un incendie’AIR Comprimé peut provoquer des blessures LE Surchauffement peut endom- mager le moteur électrique DES Organes Mobiles peuvent provoquer des blessuresLES Fils DE Soudage peuvent provoquer des blessures ’EMPLOI Excessif peutProposition californienne 65 Avertissements Principales normes de sécuritéInformation EMF En ce qui concerne les implants médicauxSymbol Definitions − Definitions− Specifications Weld, Power, And Engine SpecificationsDimensions, Weights, and Operating Angles DescriptionDimensions For Units With Optional Running Gear Fuel Consumption While Welding And Using Generator PowerRPM Weld 1800 RPMGenerator Power Curve AC Amperes100% Duty Cycle at 280 Amperes DC/CC TIG Mode Volt-Ampere CurvesDuty Cycle CV/DC MIG Mode Stick And MIG Mode Volt-Ampere CurvesCC/DC Stick Mode − Installation Installing Welding GeneratorEngine Prestart Checks OilConnecting Or Replacing The Battery Replacing The Battery+ − Connect negative − cable lastStop engine and let cool Installing Exhaust PipeTools Needed 1/2 Connecting To Weld Output Terminals Stop engineFailure to properly connect Damage your machineSelecting Weld Cable Sizes Remote Receptacle Information− Operating Welding Generator Front Panel ControlsDescription Of Engine Controls See Section Cold Weather Engine OperationInfrequently LoadedControlling Engine Speed And Weld/Generator Output Process Switch Process Switch SettingsWire Position Stick PositionsStick Start Procedure − Scratch Start Technique TIG Lift-ArcStart ProcedureLift-Arc t TIG TIG Electrode WorkpieceRemote Voltage/Amperage Control Min 20 a DCConnect Remote Set Process Stick Welding OnlyHz Generator Power Receptacles And Supplementary Protectors Controlling Engine Speed And Weld/Generator Power Output− Operating Auxiliary Equipment Extension cordRized Service Agent Variable Frequency Hz Generator Power Receptacle RC3Press button to reset. If supple Current Available in Amperes Receptacle− Maintenance & Troubleshooting Routine Maintenance100 200Maintenance Label Servicing Air Cleaner Servicing Optional Spark ArrestorChanging Engine Oil, Oil Filter, And Fuel Filter Overload Protection Open left side doorTrouble Remedy TroubleshootingWelding Hz Generator Power Receptacles RC1 And RC2 Variable Frequency Generator Power Receptacle RC3Check receptacle wiring and connections Necessary partsEngine starts but stops when Engine EngineCheck engine charging system according to engine manual Od of timeRecommended Spare Parts − Parts ListRecommended Spare Parts − Electrical Diagrams Circuit Diagram For Welding Generator Models232 961-A − Generator Power Guidelines Selecting EquipmentGrounding Generator To Truck Or Trailer Frame Electrically Bond GeneratorGrounding When Supplying Building Systems How Much Power Does Equipment Require?Use ground device as stated in electrical codes Amperes x Volts = WattsApproximate Power Requirements For Industrial Motors Approximate Power Requirements For Farm/Home EquipmentIndustrial Motors Rating Starting Watts Running Watts Farm/Home Equipment Rating Starting Watts Running WattsApproximate Power Requirements For Contractor Equipment Contractor Rating Starting Watts Running WattsPower Required To Start Motor How Much Power Can Generator Supply?Single-Phase Induction Motor Starting Requirements KVA/HP x HP x 1000 / Volts = Starting AmperageTypical Connections To Supply Standby Power Selecting Extension Cord Use Shortest Cord Possible SOCKET/WRENCH Selection Table Standard Metric Welding Symbols Page Page 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

4-7. Duty Cycle

100% Duty Cycle at 280 Amperes DC/CC

Continuous Welding

4-8. TIG Mode Volt-Ampere Curves

DC AMPERES