Miller Electric 500DX R manual Power Required To Start Motor, How Much Power Can Generator Supply?

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10-8. Power Required To Start Motor

	4		AC MOTOR		2
	1		AC MOTOR

		VOLTS	230	AMPS	2.5
		VOLTS	230	AMPS	2.5
	3	CODE	M	Hz	60
		HP	1/4	PHASE 1

Single-Phase Induction Motor Starting Requirements

Motor Start	G	H	J	K	L	M	N	P
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 Limit Load To 90% Of

Generator Output

1

2

Always start non-resistive (motor) loads in order from largest to smallest, 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-129 647 Page 49

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Contents Description OM-129 647WProcesses From Miller 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 interference− Consignes DE Sécurité − Lire Avant Utilisation Signification des symbolesUN Choc Électrique peut tuer LES Fumées ET LES GAZ peuvent être dangereuxDES Particules Volantes peuvent blesser les yeux LE Soudage peut provoquer un in- cendie ou une explosionDES Pièces Chaudes peuvent provoquer des brûlures 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 électromagnétiques Principales normes de sécuritéLE Soudage À L’ARC risque de provoquer des interférences Consignes relatives aux stimulateurs cardiaquesSymbols And Definitions − SpecificationsWeld, Power, And Engine Specifications − DefinitionsCurve shows typical fuel use under weld or power loads Dimensions, Weights, And Operating AnglesFuel Consumption 1898 lb 861 kg Engine EndWarranty Minutes Welding Minutes Resting AC Auxiliary PowerDuty Cycle And Overheating 60% Duty Cycle At 500 Amperes Duty Cycle is PercentageCC/DC Standard CV/DC Models With CV Option Volt-Ampere CurvesOptional AC Power Plant Curves Installing Welding Generator − InstallationDo Not Lift Unit From End Airflow Clearance LocationWhen electrolyte is low, add Activating The Dry Charge BatteryCharger Maintain proper levelEngine Prestart Checks Connecting The BatteryConnect Negative − Cable Last Tools Needed 1/2Selecting Weld Cable Sizes Connecting To Weld Output TerminalsRemote A/V Control Receptacle RC3 Installing Ether Cylinder Optional Ether Starting AidAfter installing cylinder, wait at Terminal Strip 2T Connections Optional Remote 14 Receptacle RC3 Information OptionalSocket Stop engineStandard Controls See Section − Operating the Welding GeneratorDescription Of Standard Controls See Section Do not switch under loadIf light goes off, stop engine and check oil level If light goes on, stop engine and check engine beltControls For Models With CV Option See Section This unit has a max OCV control circuit − Operating Auxiliary Equipment Auxiliary power is not affected by weld outputVolt And 240 Volt Duplex Receptacles 120 V 15 a AC Receptacle RC2 240 V 15 a AC Receptacle RC1Gfci Receptacle Option Optional Auxiliary Power ReceptaclesAustralian And South African Receptacle Options British Receptacle OptionSet Engine Control switch to Run when using auxiliary power Connecting Optional Auxiliary Power Plant1011 Load Terminals− Maintenance & Troubleshooting Deutz F3L912 Diesel Engine Maintenance LabelHose Servicing Air CleanerTo clean air filter Servicing Fuel And Lubrication Systems 1850 Adjusting Engine SpeedServicing Optional Ether Starting Aid Checking And Replacing Alternator Belt To adjust belt tension13 mm Max Tools Needed 11/16 Stop engine To check belt tensionResetting Fan Belt Safety Shutdown Stop engine and let cool. Reinstall cleanout plug Inspecting And Cleaning Optional Spark Arrestor MufflerOverload Protection For Models With CV Option Stop engine and let coolWelding TroubleshootingEngine Auxiliary PowerTrouble Remedy OM-129 647 Circuit Diagram For Welding Generator Standard Models − Electrical DiagramsCircuit Diagram For Welding Generator Models With CV Option 184 954-C Wetstacking − RUN-IN ProcedureLoad Bank Run-In Procedure Using Load BankDo not touch hot exhaust Run-In Procedure Using Resistance GridBank/grid From flammablesGrounding Generator To Truck Or Trailer Frame − Auxiliary Power GuidelinesSelecting Equipment How Much Power Does Equipment Require? Grounding When Supplying Building SystemsEarth ground if supplying Use ground device as stated in electrical codesApproximate 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 x 1000 = Starting Amperage VoltsEmergencies or power outages Generator is to supply standby power duringWelding Generator Auxiliary Power output circuit Customer-supplied equipment is required ifSelecting Extension Cord Use Shortest Cord Possible 101 100 − Parts List66 65 102 Dia Part Description Quantity Mkgs Optional Panel, Front w/Components CC Model Illustrated Panel, Front w/Components -1 Item 6 5 GeneratorGenerator -1 Item Includes 171Hardware is common Not available unless listed Control Box CC/CV -1 Item 86 Optional Panel, Mtg Components CC/CV Model Panel, Mtg Components CC Model Page Support ServiceYour distributor also gives For assistance in filing or settling claims Miller Electric Mfg. CoTo locate distributor nearest you call 1-800-4-A-Miller