Hobart Welding Products OM-498 manual Power Required To Start Motor, KVA/HP x HP x

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10-8. Power Required To Start Motor

4

 

 

AC MOTOR

 

2

1

 

 

 

 

VOLTS

230

AMPS

2.5

 

 

 

 

 

3

 

CODE

M

Hz

60

 

 

 

HP

1/4

PHASE 1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Single-Phase Induction Motor Starting Requirements

Motor Start

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Code

G

 

H

 

J

K

L

M

 

N

 

P

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

KVA/HP

6.3

 

7.1

8.0

9.0

10.0

11.2

 

12.5

 

14.0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

kVA/HP x HP x 1000

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

= STARTING AMPERAGE

 

 

 

 

 

 

 

VOLTS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

EXAMPLE: Calculate the starting amperage required for a 230 V, 1/4

 

 

HP motor with a motor start code of M.

 

 

 

 

 

 

 

Volts = 230

HP = 1/4 Using Table, Code M results in kVA/HP = 11.2

11.2 x 1/4 x 1000

= 12.2 A

Starting the motor requires 12.2 amperes.

 

230

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1Motor Start Code

2Running Amperage

3Motor HP

4Motor Voltage

To find starting amperage:

Step 1: Find code and use table to find kVA/HP. If code is not listed, multiply running amperage by six to find starting amperage.

Step 2: Find Motor HP and Volts.

Step 3: Determine starting amper- age (see example).

Welding generator amperage out- put must be at least twice the motor’s running amperage.

S-0624

10-9. How Much Power Can Generator Supply?

1

2

1Limit Load To 90% Of Generator Output

Always start non-resistive (motor) loads in order from largest to small- est, and add resistive loads last.

2 5 Second Rule

If motor does not start within 5 seconds, turn off power to prevent motor damage. Motor requires more power than generator can supply.

Ref. ST-800 396-A / S-0625

OM-498 Page 38

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Contents OM-498 ProcessesDescription From Hobart to You Table of Contents Page Electric Shock can kill Symbol UsageArc Welding Hazards ARC Rays can burn eyes and skinEngine Hazards Engine Exhaust Gases can kill Battery Explosion can BlindMoving Parts can cause injury Engine Heat can cause fireRadiation can cause interference Principal Safety StandardsEMF Information ARC Welding can cause interferenceUN Choc É Lectrique peut tuer Signification des symbolesConsignes DE SÉ Curité Lire Avant Utilisation LES Fumé ES ET LES GAZ peuvent ê tre dangereuxDES PIÈ CES Chaudes peuvent provoquer des brû lures graves LE Soudage peut provoquer un in- cendie ou une explosionDES Particules Volantes peuvent blesser les yeux LE Bruit peut affecter l’ouïeLA Chaleur DU Moteur peut pro- voquer un incendie DES Organes Mobiles peuvent provoquer des blessures’EXPLOSION DE LA Batterie peut LA Chute DE L’APPAREIL peut blesserLE Soudage À L’ARC risque de provoquer des interfé rences Principales normes de sé curitéInformation sur les champs é lectromagné tiques Consignes relatives aux stimulateurs cardiaquesWeld, Power, And Engine Specifications SpecificationsSymbol Definitions DefinitionsDimensions Dimensions, Weights, And Operating AnglesFuel Consumption Kohler-Powered Units Weight Kohler-Powered UnitsDuty Cycle Fuel Consumption Honda-Powered UnitsExceeding duty cycle can damage unit and void warranty 100% Duty Cycle at 80 Amperes CC/DCAuxiliary Power Curve Volt-Ampere CurvesInstallation Installing Welding GeneratorGrounding Generator To Truck Or Trailer Frame Grounding Generator When Supplying Building Systems Use ground device as stated in electrical codesOil Engine Prestart Checks Honda-Powered UnitsConnecting The Battery Honda Electric-Start Models Only Connect negative cable last45 m 60 m 70 m 90 m 105 m 120 m Connecting To Weld Output TerminalsSelecting Weld Cable Sizes Stop engine before60 Hz Controls Kohler-Powered UnitsOperating the Welding Generator Choke Control LeverControls Honda-Powered Units See Section Recoil-Start 2Electric-StartDescription Of Controls Honda-Powered Units See Section Auxiliary Power Panel 196 921 CSA Operating Auxiliary EquipmentCircuit Breakers CB1 and CB2 Australia Europe Auxiliary Power Panel 196 Optional Auxiliary Power PanelsAuxiliary Power Panel 495 Auxiliary Power Panel 495 South America AsiaAuxiliary Power Panel Ratings It exceeds 3500WPlex receptacle shares a load with Plug Wired For 120/240Wire Load One half of the 240 V receptacleMaintenance Maintenance Label Overload Protection Honda-Powered Units OnlyTop View Idle Speed Adjustment Adjusting Engine Speed Kohler-Powered UnitsWeld/Power Speed Adjustment Stop engine. Close fuel valve Top ViewStop engine. Close fuel valve Adjusting Engine Speed Honda-Powered UnitsThrottle Control Lever Adjustment Screw Tools Needed 3/8Auxiliary Power TroubleshootingTroubleshooting WeldingEngine Check battery voltage Honda electric-start models onlyViscosity oil for operating temperature Make starting difficultElectrical Diagrams Circuit Diagram For Welding GeneratorWiring Diagram For Welding Generator Wiring Diagram For Auxiliary Power Panels 1 Wiring Diagram For Auxiliary Power Panels 2 Auxiliary Power Guidelines Selecting EquipmentEarth ground if supplying Grounding When Supplying Building SystemsHow Much Power Does Equipment Require? Rating DataIndustrial Motors Rating Starting Watts Running Watts Approximate Power Requirements For Industrial MotorsApproximate Power Requirements For Farm/Home Equipment Farm/Home Equipment Rating Starting Watts Running WattsApproximate Power Requirements For Contractor Equipment Contractor Rating Starting Watts Running WattsSingle-Phase Induction Motor Starting Requirements Power Required To Start MotorHow Much Power Can Generator Supply? KVA/HP x HP xSafety practices Power Company ServiceObtain and install correct switch 120 Single-PhaseSelecting Extension Cord Use Shortest Cord Possible Current Load Watts AmperesStick Welding Procedure Weld current starts when electrode touches work- pieceStick Welding Smaw Guidelines Electrode and Amperage Selection Chart Striking an Arc Scratch Start TechniqueStriking an Arc Tapping Technique Positioning Electrode Holder Poor Weld Bead CharacteristicsGood Weld Bead Characteristics 9090 End View of Work AngleConditions That Affect Weld Bead Shape Electrode Movement During WeldingTee Joint Butt JointsLap Joint 16 in 1.6 mm Tack WeldsWeld Test Troubleshooting PorosityTroubleshooting Excessive Spatter Possible Causes Corrective ActionsTroubleshooting Incomplete Fusion Troubleshooting Lack Of PenetrationTroubleshooting Excessive Penetration Troubleshooting Burn-Through Troubleshooting Waviness Of BeadTroubleshooting Distortion OM-498 Parts List 31-FigDia Part Canada South Africa AustraliaEurope America Auxiliary Power Panel 495 289 Australia Auxiliary Power Panel 495 CanadaAuxiliary Power Panel 495 253 South Africa Auxiliary Power Panel 495 290 EuropeOM-498 Service SupportContact your Distributor for Hobart Welding ProductsCall