Miller Electric 400P, 500 X Power Required To Start Motor, How Much Power Can Generator Supply?

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12-8. Power Required To Start Motor

Single-Phase Induction Motor Starting Requirements

Motor Start	G	H	J	K	L	M	N	P
Code

KVA/HP	6.3	7.1	8.0	9.0	10.0	11.2	12.5	14.0

4
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

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.

(kVA/HP x HP x 1000) / Volts =

Starting Amperage

Example: Calculate starting amper- age required for a 230 V, 1/4 HP mo- tor with a motor start code of M.

Volts = 230, HP = 1/4, kVA/HP = 11.2

(11.2 x 1/4 x 1000) / 230 = 12.2A

Starting the motor requires 12.2 amperes.

S-0624

12-9. 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 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-4421 Page 65

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Contents File Engine Drive OM-4421215 075QProcesses DescriptionFrom Miller to You Table of Contents − Maintenance & Troubleshooting Decrot1/07 DirectivesStandards Decrotsound6/05 Manufacturer European Contact Notified BodyHOT Parts can cause severe burns Symbol UsageArc Welding Hazards Electric Shock can killWelding can cause fire or explosion Fumes and Gases can be hazardousBuildup of GAS can injure or kill ARC Rays can burn eyes and skinCompressed Air Hazards Engine HazardsFalling Unit can cause injury Welding Wire can cause injuryHOT Parts can cause burns and injury Fire or Explosion hazardRadiation can cause interference Principal Safety StandardsCalifornia Proposition 65 Warnings EMF InformationIndique des instructions spécifiques Signification des symboles− Consignes DE Sécurité − Lire Avant Utilisation UN Choc Électrique peut tuerLE Bruit peut affecter l’ouïe DES Pièces Chaudes peuvent provoquer des brûlures gravesLES Fumées ET LES GAZ peuvent être dangereux LE Soudage peut provoquer un in cendie ou une explosionDES Organes Mobiles peuvent pro voquer des blessures ’EXPLOSION DE LA Batterie peuRisque D’INCENDIE OU D’EXPLO- Sion LA Chaleur DU Moteur peut pro- voquer un incendie’AIR Comprimé peut provoquer des blessures ’EMPLOI Excessif peut LE Surchauffement peut endom- mager le moteur électriqueDES Organes Mobiles peuvent provoquer des blessures LES Fils DE Soudage peuvent provoquer des blessuresEn ce qui concerne les implants médicaux Proposition californienne 65 AvertissementsPrincipales normes de sécurité Information EMFStd − Definitions− 50 h Std Manufacturer’s Rating Labels Some symbols are found only on export products Symbols And DefinitionsDimensions, Weights, And Operating Angles − SpecificationsWeld, Power, And Engine Specifications Volt-Ampere Curves For CC Models Volt-Ampere Curves For CC/CV Models Stick ModeMIG Mode TIG Mode100% Duty Cycle At 400 Amperes Fuel ConsumptionDuty Cycle And Overheating 15 kVA/kW Three-Phase AC Output No Weld Load AC Generator Power CurveOptional Three-Phase Generator Curves 12 kVA/kW Single-Phase AC Output No Weld LoadGrounding1 − InstallationInstalling Welding Generator Location/Airflow ClearanceUsing Lifting Eye Mounting Welding Generator Stop engine and let cool Installing Exhaust PipeConnecting The Battery Activating The Dry Charge Battery If ApplicableEngine Prestart Checks Coolant Recovery TankStop engine Connecting To Weld Output TerminalsStick and TIG Welding MIG and Fcaw Welding350 ft 400 ft 45 m 60 m 70 m 90 m 105 m 120 m Connecting to WeldSelecting Weld Cable Sizes 150 ft 200 ft 250 ftSocket Connecting To Remote 14 Receptacle RC14 On CC/CV ModelsOM-4421 Front Panel Controls For CC Models See Section − Operating Welding Generator − CC ModelsWeld Controls Engine Starting ControlsTo Start Engine Gauges And MetersExample Combination Remote Amperage Control Stick Remote Amperage Control On CC Models OptionalWeld Control/Arc Condition Information Label OM-4421 Front Panel Controls For CC/CV Models See Section − Operating Welding Generator − CC/CV Models14 AC/DC Voltmeter Optional Voltage/Amperage Adjust Switch And Remote 14 ReceptacleElectric shock can kill Process/Contactor Switch Settings Process/Contactor Switch On CC/CV ModelsExample Combination Remote Amperage Control TIG Remote Voltage/Amperage Control On CC/CV Models OptionalIf a Supplementary − Operating Auxiliary EquipmentVolt And 240 Volt Receptacles At least once a month, run enClose panel opening if no connections are made to generator Three-Phase Power ConnectionRear Of Panel Supplementary Protector CB2 Supplementary Protector CB3 Optional Generator Power Receptacles240 V 15 a AC South African Receptacle RC1 Maintenance Label − Maintenance & TroubleshootingRoutine Maintenance Checking Generator Brushes To clean air filter Servicing Air CleanerInspecting And Cleaning Optional Spark Arrestor Muffler Standard Model Idle Speed Ad- justment Adjusting Engine SpeedWeld/Power Speed Adjustment Engine Speed No LoadWhile draining fuel tank Servicing Fuel And Lubrication SystemsTo change oil and filter To replace primary fuel filterOverload Protection Welding − CC Models TroubleshootingWelding − CC/CV Models Optional Three-Phase Generator Power CC/CV Models Only Standard Generator PowerEngine Welding Symbols Circuit Diagram For CC Welding Generator − Electrical Diagrams223 522-B Circuit Diagram For CC/CV Welding Generator 223 523-B Welding Generator − RUN-IN ProcedureWetstacking From flammables Run-In Procedure Using Load BankKeep exhaust and pipe away Manual Run-In Procedure Using Resistance GridSpecifications section in this Just generator A/V control soElectrically Bond Generator − Generator Power GuidelinesSelecting Equipment Grounding Generator To Truck Or Trailer FrameAmperes x Volts = Watts Grounding When Supplying Building SystemsHow Much Power Does Equipment Require? Use ground device as stated in electrical codesFarm/Home Equipment Rating Starting Watts Running Watts Approximate Power Requirements For Industrial MotorsApproximate Power Requirements For Farm/Home Equipment Industrial Motors Rating Starting Watts Running WattsContractor Rating Starting Watts Running Watts Approximate Power Requirements For Contractor EquipmentKVA/HP x HP x 1000 / Volts = Starting Amperage Power Required To Start MotorHow Much Power Can Generator Supply? Single-Phase Induction Motor Starting RequirementsTypical Connections To Supply Standby Power Selecting Extension Cord Use Shortest Cord Possible − Parts List 128 93 −6 105 104 100 101 102 103 Main Assembly 010 Figures 13-2 Figures 13-4 Control Box Assembly − CC Models 087 Control Box Assembly − CC/CV Models -1Item Control Box Assembly − CC/CV ModelsTD1 214 3634 Panel, Front w/Components − CC ModelsPanel, Front w/Components − CC Models -1Item 40 39 Panel, Front w/Components − CC/CV ModelsPanel, Front w/Components − CC/CV Models -1Item 170 34 36 27 26 Hardware is common Not available unless listed602 SCREW, .312−18x .75 hexwhd.66d stl pld slffmg tap−rw 601 Main Rectifier Assembly Wiring Harnesses PLG4 Harness, receptacle auxiliary power export models includesPage Support ServiceYour distributor also gives Your distributor and/or equipment manufacturer’s To locate a Distributor or Service Agency visitMiller Electric Mfg. Co For assistance in filing or settling claims, contact