Hobart Welding Products 300 AC, 300 DC manual Duty Cycle And Overheating, DC Mode CV or CC

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2-3. Duty Cycle And Overheating

A. AC Mode

AC Mode: 40% Duty Cycle At 200 Amperes

4 Minutes Welding

6 Minutes Resting

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

If unit overheats, thermostat opens, output stops, and cooling fan runs. Wait fifteen minutes for unit to cool. Reduce amperage or duty cycle be- fore welding.

YExceeding duty cycle can damage unit and void warranty.

B. DC Mode (CV or CC)

DC Mode: 50% Duty Cycle At 300 Amperes

5 Minutes Welding

5 Minutes Resting

Overheating

0	A
	15
	OR
Minutes	Reduce Duty Cycle
Minutes

duty1 4/95 / SB-127 200-A / SB-127 199-A

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Contents Description OM-318Processes From Hobart to You Table of Contents Page Arc Welding Hazards Symbol UsageMarks a special safety message Electric Shock can killFlying Metal can injure eyes ARC Rays can burn eyes and skinWelding can cause fire or explosion Buildup of GAS can injure or killPrincipal Safety Standards EMF Information About PacemakersUN Choc É Lectrique peut tuer Signification des symbolesConsignes DE Securite Lire Avant Utilisation 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 ’EMPLOI Excessif peut Risque D’INCENDIE OULA Chute DE L’APPAREIL peut blesser DES Organes Mobiles peuvent provoquer des blessuresConsignes relatives aux stimulateurs cardiaques Principales normes de sé curitéInformation sur les champs é lectromagné tiques AC Mode InstallationSpecifications CC Mode DC CV Mode DCDC Mode CV or CC Duty Cycle And OverheatingWeight Dimensions And WeightsDimensions Selecting a LocationWeld Output Welding 10 60% 60 100% 10 100% Duty Cycle Weld Output Terminals And Selecting Cable SizesRemote 14 Receptacle Cycle60 Hz 50 Hz Electrical Service GuideVolts AC Duplex Receptacle Section Placing Jumper Links And Connecting Input PowerSpecial installation may be Operation ControlsDisconnect power before maintaining Maintenance & TroubleshootingRoutine Maintenance MonthsTroubleshooting Trouble RemedyOM-318 Electrical Diagram Circuit DiagramParts List Main AssemblyPLG51 Panel, Front w/Components Panel, Front w/Components -1 Item 126 Rectifier, Si Diode -1 ItemPage Page Service SupportContact your Distributor for Hobart Welding Products