Miller Electric 125C manual Installation, Specifications For Torch, Duty Cycle And Overheating

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SECTION 4 − INSTALLATION

4-1. Specifications

Primary		Primary	Primary Service	Secondary	Secondary			Rated	Power	Max**
Primary		Primary	Primary Service	Secondary	Secondary			Cutting	Power	OCV
Volts		Amperes	(Recommended)	Volts (DC)	Amperes	KW	KVA	Capacity	Factor	(DC)

								0.25 in
120		20.32	20A	110	12	2.01	2.44	(6.4 mm)	0.82	335
120		(0.25*)	20A	110	12	2.01	2.44	At 6 IPM	0.82	335
		(0.25*)						At 6 IPM
								(2.5 mm/s)

*While idling
**10% High line condition

4-2. Specifications For Torch

Air-cooled torch for plasma arc cutting (PAC)

35% duty cycle

Compressor output: 1.2 scfm (28.3 L/min) at 50 PSI (345 kPa) at 700 ft (213 m)

Safety interlock devices shut down power source

Safety trigger guard

Cutting capacity: see Section 4-1

4-3. Duty Cycle And Overheating

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

		If unit overheats, thermostat(s)
		opens, output stops, Temperature
		trouble light goes On, and cooling
		fan runs. Wait fifteen minutes for
		unit to cool or temperature light to
3-1/2 Minutes Cutting	6-1/2 Minutes Resting	go off. Reduce amperage or duty
3-1/2 Minutes Cutting	6-1/2 Minutes Resting	cycle before cutting or gouging.
		Y Exceeding duty cycle can

	damage unit and void
Overheating	warranty.
Overheating

0

15

Minutes

duty1 4/95 − 802 459-B

OM-2248 Page 10

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Contents Description OM-2248Processes File Plasma CuttersFrom Miller to You Table of Contents Page Plasma Arc Cutting Hazards Symbol UsageMarks a special safety message Cutting can cause fire or explosionARC Rays can burn eyes and skin Exploding Parts can injureFlying Sparks can cause injury Noise can damage hearingCalifornia Proposition 65 Warnings About Pacemakers Principal Safety StandardsEMF Information UNE Décharge Électrique peut entraîner la mort Signification des symbolesLE Coupage présente un risque de feu ou d’explosion Identifie un message de sécurité particulierLES Fumées ET LES GAZ peuvent être dangereux Risque de blessure en casLE Bruit peut endommager l’ouïe LE Plasma D’ARC peut entraîner des blessuresDES Organes Mobiles peuvent provoquer des blessures LES Bouteilles peuvent exploser si elles sont endommagéesDES Pieces Chaudes peuvent pro- voquer des brûlures graves DES Particules Volantes peuvent blesser les yeuxConsignes relatives aux stimulateurs cardiaques Principales normes de sécuritéInformation sur les champs électromagnétiques I1eff − DefinitionsI1max Specifications For Torch − InstallationSpecifications Duty Cycle And OverheatingSelecting a Location Torch Dimensions And WeightDimensions And Weight Movement Location And AirflowConnecting Work Clamp Connecting Input PowerCutting Speed − OperationControls Trigger Safety Lock Sequence Of Operation 196Week − Maintenance & TroubleshootingRoutine Maintenance 1CUP Temp Input Voltage Checking Torch Shield Cup Shutdown SystemWork Cable Connections Torch And Work Cable ConnectionsTorch Connections Turn Off power source before checking torch parts Checking/Replacing Retaining Cup, Tip, And ElectrodeTroubleshooting Power Source Troubleshooting Torch − Electrical Diagram Circuit DiagramOM-2248 − Parts List Main AssemblyDia Part Torch, ICE-12C Service SupportOwner’s Record Miller Electric Mfg. Co