Hobart OM-353 manual Duty Cycle And Overheating, 60% Duty Cycle At 200 Amperes

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3-3. Duty Cycle And Overheating

Duty Cycle is percentage of 10 min- utes that unit can weld at rated load without overheating.

If unit overheats, thermostat opens, output stops, light goes on (CE models only), and cooling fan runs. Wait fifteen minutes for unit to cool. Reduce amperage or duty cycle be- fore welding.

Y Exceeding duty cycle can damage unit and void warranty.

40% Duty Cycle At 250 Amperes (60 Hz Models Only)

4 Minutes Welding

6 Minutes Resting

60% Duty Cycle At 200 Amperes

6 Minutes Welding

4 Minutes Resting

Overheating

0	A
	15
	OR
Minutes	Reduce Duty Cycle
Minutes

duty1 4/95 / SB-116 198

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Contents Description OM-353122200UProcesses From Hobart to You Table of Contents Page Marks a special safety message Symbol UsageArc Welding Hazards Electric Shock can killWelding can cause fire or explosion ARC Rays can burn eyes and skinFlying Metal can injure eyes Buildup of GAS can injure or killPrincipal Safety Standards About Pacemakers EMF InformationConsignes DE Securite Lire Avant Utilisation Signification des symbolesUN Choc É Lectrique peut tuer LES Fumé ES ET LES GAZ peuvent ê tre dangereuxLE Bruit peut affecter l’ouïe LE Soudage peut provoquer un incendie ou une explosionDES Particules Volantes peuvent blesser les yeux LA Chute DE L’APPAREIL peut blesser Risque D’INCENDIE OU’EMPLOI Excessif peut DES Organes Mobiles peuvent provoquer des blessuresConsignes relatives aux stimulateurs cardiaques Principales normes de sé curitéInformation sur les champs é lectromagné tiques Definitions + + + Rating Label For CE Products ISO/IECSome symbols are found only on CE products Symbols And DefinitionsSpecifications InstallationDC Mode AC Mode Volt-Ampere CurvesOverheating Duty Cycle And Overheating60% Duty Cycle At 200 Amperes Movement Location And Airflow Dimensions And WeightsSelecting a Location Tipping Be careful when placing or moving unit over uneven surfacesWeld Output Terminals And Selecting Cable Sizes ARC Welding can cause Electromagnetic InterferenceRemote 14 Receptacle Turn Off power before connecting to receptacleVolts AC Duplex Receptacle And Shielding Gas Connections SocketAll values calculated at 60% duty cycle Electrical Service GuideCheck label inside your unit- only one label is on unit Placing Jumper Links And Connecting Input PowerControls OperationMeters Output Selector SwitchApplication Crater Time ControlsSpot Time Controls Balance Control AC Gtaw Setting Output WaveformsAC Balance Control Output Contactor Control Switch Amperage Adjustment ControlsFor AC And DC Smaw Welding Arc ControlsPostflow Time Control Preflow Time Control Optional High Frequency ControlsRoutine Maintenance Maintenance & TroubleshootingDisconnect power before maintaining MonthsTurn Off power before adjusting spark gaps Adjusting Spark GapsTroubleshooting Reset circuit breaker CB1 see Section Circuit Diagram High Frequency HF Welding Processes Using HFSources Of HF Radiation From Incorrect Installation Correct Installation Main Assembly Parts ListDia Part Description Quantity Mkgs Panel, Front w/Components Panel, Front w/Components -1 Item Rectifier, Si Diode -1 Item 181Panel, Mtg Components -1 Item Control Panel, Lower Front Control Panel, Lower Front -2 Item OM-353 Page Page Support ServiceHobart Welding Products Contact your Distributor for