Miller Electric SRH-503 manual Installation, Specifications, Duty Cycle And Overheating

Page 15

SECTION 4 − INSTALLATION

4-1. Specifications

 

 

 

 

Amperes Input at Rated Load

 

 

 

Rated Welding

 

 

Output, 60 Hz, Three-Phase

 

 

 

 

 

 

 

 

 

Model

Output

Amp Range DC

Max OCV DC

220-230 V

440-460 V

KVA

KW

 

 

 

 

 

 

 

 

500 Amp

500 A @ 40 Volts DC,

50 − 525

77

98

49

38.9

26

60% Duty Cycle

 

4.5*

2.2*

1.8*

0.7*

 

 

 

 

 

 

 

 

 

 

 

*While idling

4-2. Duty Cycle And Overheating

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Duty Cycle is percentage of 10 min-

 

 

 

 

 

 

 

utes that unit can weld at rated load

 

 

 

 

 

 

 

without overheating.

 

 

 

1000

 

 

 

 

 

Y Exceeding duty

cycle

can

 

900

 

 

 

 

 

damage

unit

and

void

 

800

 

 

 

 

 

warranty.

 

 

 

AMPERES

700

 

 

 

 

 

 

 

 

 

600

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

500

 

 

 

 

 

 

 

 

 

 

400

 

 

 

 

 

 

 

 

 

WELD

300

 

 

 

 

 

 

 

 

 

200

 

 

 

 

 

 

 

 

 

 

100

 

 

 

 

 

 

 

 

 

 

10

20

30

40

50

60

70 80 90100

 

 

 

 

 

 

% DUTY CYCLE

 

 

 

 

 

 

 

60% Duty Cycle At 500 Amperes For 500 Ampere Models

 

 

 

 

 

6 Minutes Welding

 

 

4 Minutes Resting

 

 

 

Overheating

 

 

0

 

 

 

V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

15

 

 

 

 

 

 

 

 

 

 

 

 

 

OR

 

 

 

 

 

Minutes

 

 

Reduce Duty Cycle

 

 

205 909

 

 

 

 

 

 

 

 

OM-2236 Page 11

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Contents OM-2236 ProcessesDescription From Miller to You Table of Contents Page Electric Shock can kill Symbol UsageMarks a special safety message Arc Welding HazardsBuildup of GAS can injure or kill ARC Rays can burn eyes and skinWelding can cause fire or explosion Flying Metal can injure eyesCalifornia Proposition 65 Warnings Principal Safety Standards EMF InformationAbout Pacemakers − Consignes DE Sécurité − À Lire Avant Utilisation Identifie un message de sécurité particulierLE Bruit peut affecter l’ouïe LE Soudage peut causer un incen- die ou une explosionLES Particules Projetées peu- vent blesser les yeux LES Pièces Chaudes peuvent cau- ser des brûlures gravesLES Pièces Mobiles peuvent cau- ser des blessures Risque D’INCENDIE OU D’EXPLOLA Chute DE L’APPAREIL peut blesser ’EMPLOI Excessif peut Faire Principales normes de sécurité Information sur les champs électromagnétiques Consignes relatives aux stimulateurs cardiaques − Definitions General Precautionary Label? a Nameplate Safety SymbolsInput Connection Label Do Not Lift− Installation SpecificationsDuty Cycle And Overheating Volt-Ampere Curves Selecting a LocationMovement Location And Airflow Tipping Dimensions And WeightsDimensions w/Running Gear And Lift Eye Be careful when placing or moving unit over uneven surfaces45 m 60 m 70 m 90 m 105 m 120 m Selecting And Preparing Weld Output CablesWeld Cable Sizes 150 ft 200 ft 250 ft 300 ft 350 ftElectrical Service Guide Connecting To Weld Output TerminalsPlacing Jumper Links Connecting Input Power Welding Power Source Input Power ConnectionsDisconnect Device Input Power Con- nections Controls − OperationElectrode/Amperage Selector Fuse F1 − Maintenance & TroubleshootingRoutine Maintenance Disconnect power before maintaining MonthsTrouble Remedy Troubleshooting TableOM-2236 Circuit Diagram − Electrical DiagramMain Assembly − Parts ListHINGE,CONT Polyolefin Copolymer 2.000 L W/.125H THERMOSTAT,NC Open 135C Close 135C W/INSUL Leads Support ServiceMiller Electric Mfg. Co Owner’s Record
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