Hobart 3225DX Power Required To Start Motor, How Much Power Can Generator Supply?, 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-130 098 Page 41

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Contents Processes OM-130Visit our website at AugustFrom Hobart to You Table of Contents Page Arc Welding Hazards Symbol UsageElectric Shock can kill ARC Rays can burn eyes and skinEngine Hazards Moving Parts can cause injury Battery Explosion can BlindEngine Exhaust Gases can kill Engine Heat can cause fireEMF Information Principal Safety StandardsRadiation can cause interference ARC Welding can cause interferenceConsignes DE SÉ Curité Lire Avant Utilisation Signification des symbolesUN Choc É Lectrique peut tuer LES Fumé ES ET LES GAZ peuvent ê tre dangereuxDES Particules Volantes peuvent blesser les yeux LE Soudage peut provoquer un in- cendie ou une explosionDES PIÈ CES Chaudes peuvent provoquer des brû lures graves LE Bruit peut affecter l’ouïe’EXPLOSION DE LA Batterie peut DES Organes Mobiles peuvent provoquer des blessuresLA Chaleur DU Moteur peut pro- voquer un incendie LA Chute DE L’APPAREIL peut blesserInformation sur les champs é lectromagné tiques Principales normes de sé curitéLE Soudage À L’ARC risque de provoquer des interfé rences Consignes relatives aux stimulateurs cardiaquesDefinitions Symbols And DefinitionsSpecifications Weld, Power, And Engine SpecificationsDimensions, Weights, And Operating Angles Fuel Consumption Warranty Minutes Welding Minutes RestingDuty Cycle And Overheating 40% Duty Cycle At 400 AmperesVolt-Ampere Curves AC Auxiliary PowerOptional AC Power Plant Curves Installation Installing Welding GeneratorInstalling Muffler Pipe Do not overfill battery cells Activating The Dry Charge BatteryVent Caps For 12 MinutesEngine Prestart Checks Connecting The BatteryConnect Negative Cable Last FullInstalling Ether Cylinder Optional Ether Starting Aid Connecting To Weld Output TerminalsPut cap on fitting when cylinder is removed Selecting Weld Cable Sizes 100 ft 30 m Or Less10 100% Duty Cycle OM-130 098 Controls See Section Operating the Welding GeneratorRemote A/V Control Description Of Front Panel Controls See SectionVolt And 240 Volt Duplex Receptacles Operating Auxiliary EquipmentOptional Auxiliary Power Receptacles Gfci Receptacle OptionAustralian, British, And South African Receptacle Options Connecting Optional Auxiliary Power Plant Maintenance and Troubleshooting Maintenance Label To clean air filter Servicing Air CleanerStop engine HoseServicing Fuel And Lubrication Systems To change oil and filterTo replace primary fuel filter Adjusting Engine Speed Standard ModelsModels With Automatic Idle Optional Full Empty Overload Protection Servicing Optional Ether Starting AidInspecting And Cleaning Optional Spark Arrestor TroubleshootingWelding Check connections to auxiliary power plant see Section Auxiliary PowerEngine Maximum see SectionCircuit Diagram For Welding Generator Electrical DiagramWetstacking RUN-IN ProcedureStop engine Do not touch hot exhaust Run-In Procedure Using Load BankBank/grid From flammablesRun-In Procedure Using Resistance Grid Auxiliary Power Guidelines Selecting EquipmentGrounding Generator To Truck Or Trailer Frame How Much Power Does Equipment Require? Grounding When Supplying Building SystemsEarth ground if supplying Amperes x Volts = WattsApproximate Power Requirements For Farm/Home Equipment Approximate Power Requirements For Industrial MotorsIndustrial Motors Rating Starting Watts Running Watts Farm/Home Equipment Rating Starting Watts Running WattsContractor Rating Starting Watts Running Watts Approximate Power Requirements For Contractor EquipmentHow Much Power Can Generator Supply? Power Required To Start MotorSingle-Phase Induction Motor Starting Requirements KVA/HP x HP xObtain and install correct switch Power Company ServiceSafety practices 120 Single-PhaseCurrent Load Watts Amperes Selecting Extension Cord Use Shortest Cord Possible118 117 116 115 Parts List71Includes 113 114 11065 FIG Dia Part Description Quantity Mkgs 126 102 Optional Equipment Panel, Front w/Components Panel, Front w/Components -1 Item 11 10 GeneratorGenerator -1 Item Includes 114Support ServiceContact your Distributor for Hobart Welding ProductsCall

3225DX specifications

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