Miller Electric UPC 838 manual Installation, Specifications, Duty Cycle And Overheating

Page 16

SECTION 4 − INSTALLATION

4-1. Specifications

 

Input

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Maximum

Model/Rated

Volts @

Amperes

 

 

Rated Cutting

Type of

Plasma Gas

@ Rated

 

 

Open-Circuit

Output

KVA

KW

Capacity

Output

50/60 Hz,

Cutting

 

Voltage DC

 

3 Phase

 

 

 

 

 

 

Capacity

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

7/8 in

Direct

 

 

UPC 838

380

21.6

14.21

13.50

(22 mm)

 

 

 

 

 

 

At 10 IPM

Current,

Air Or Nitrogen

 

80 A @ 112

 

 

 

 

350

 

 

 

 

 

Straight

Volts DC, 60%

 

 

 

 

 

Only

 

 

 

 

7/8 in

 

 

 

 

Polarity

 

Duty Cycle

440

19.3

14.71

13.9

(22 mm)

 

 

(DCEN)

 

 

 

 

 

 

 

 

 

 

At 10 IPM

 

 

 

 

 

 

 

 

 

 

 

 

4-2. Duty Cycle And Overheating

Three-Phase Input Power:

60% Duty Cycle

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, and cooling fan runs. Wait fifteen minutes for unit to cool. Reduce amperage or duty cycle before cutting.

YExceeding duty cycle can damage unit and void war- ranty.

6 Minutes Cutting

4 Minutes Resting

Overheating

0

A

15

OR

MinutesReduce Duty Cycle

duty1 4/95

OM-202 515 Page 12

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Contents Processes OM-202 515CDescription Page Table of Contents Directives StandardsSymbol Usage Marks a special safety messagePlasma Arc Cutting Hazards Cutting can cause fire or explosionExploding Parts can injure Flying Sparks can cause injuryARC Rays can burn eyes and skin Noise can damage hearingCalifornia Proposition 65 Warnings EMF Information Principal Safety StandardsAbout Pacemakers Signification des symboles LE Coupage présente un risque de feu ou d’explosionUNE Décharge Électrique peut entraîner la mort Identifie un message de sécurité particulierRisque de blessure en cas LE Bruit peut endommager l’ouïeLES Fumées ET LES GAZ peuvent être dangereux LE Plasma D’ARC peut entraîner des blessuresLES Bouteilles peuvent exploser si elles sont endommagées DES Pieces Chaudes peuvent pro- voquer des brûlures gravesDES Organes Mobiles peuvent provoquer des blessures DES Particules Volantes peuvent blesser les yeuxInformation sur les champs électromagnétiques Principales normes de sécuritéConsignes relatives aux stimulateurs cardiaques − Definitions Air Supply Precaution Use Only Oil Free Dry Compressed Air 60 sSymbols And Definitions Manufacturer’s Rating Label For CE ProductsI1max I1effSpecifications − InstallationDuty Cycle And Overheating Cutting Speed UPCSelecting a Location Dimensions And WeightMovement Do not move or operate unit Connecting Work Clamp And Gas/Air Supply Electrical Service GuideInput Voltage Input Amperes At Rated Cutting CapacityConnecting Input Power = GND/PEControls − Operation4070 Setting Gas/Air Pressure Example Of Cutting Operation Sequence Of OperationTrigger is pressed − Maintenance & Troubleshooting Routine MaintenanceEach Use Every WeekTrouble Lights Checking Shield Cup Shutdown SystemTroubleshooting Trouble RemedyOM-202 515 − Electrical Diagram Circuit Diagram For Power Source202 − Parts List Complete AssemblyDia Unitor Mkgs Description Quantity Torch, ICE-80C ICE−80C Consumables Unitor Page Page Owner’s Record
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