Miller Electric 145 DX manual Power Required To Start Motor, How Much Power Can Generator Supply?

Page 39

11-8. 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

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

 

 

 

 

 

 

 

 

 

 

 

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

11-9. 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

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Contents File Engine Drive OM-4417210 403CProcesses DescriptionFrom Miller to You Table of Contents Page Arc Welding Hazards Symbol UsageEngine Hazards Compressed Air Hazards Radiation can cause interference Principal Safety StandardsCalifornia Proposition 65 Warnings EMF InformationLES Fumées ET LES GAZ peuvent être dangereux Signification des symboles− Consignes DE Sécurité − Lire Avant Utilisation UN Choc Électrique peut tuerLE Bruit peut affecter l’ouïe LE Soudage peut provoquer un in- cendie ou une explosionDES Particules Volantes peuvent blesser les yeux DES Pièces Chaudes peuvent provoquer des brûlures gravesLES Étincelles Volantes risquent de provoquer des blessures ’AIR Comprimé peut provoquer des blessures’EMPLOI Excessif peut LE Surchauffement peut endom- mager le moteur électriqueBoulevard, Rexdale, Ontario, Canada M9W 1R3 téléphone LE Soudage À L’ARC risque de provoquer des interférencesPour les moteurs à essence Pour les moteurs diesel− Definitions − SpecificationsSymbol Definitions Weld, Power, And Engine SpecificationsDimensions, Weights, And Operating Angles DimensionsVolt-Ampere Curves Fuel Consumption Generator Power Curve Duty Cycle100% Duty Cycle at 80 Amperes CC/DC − Installation Installing Welding GeneratorGrounding Generator To Truck Or Trailer Frame Fuel Valve Open valve Grounding Generator When Supplying Building SystemsEngine Prestart Checks − Standard Model 13 mm Full GasolineTools Needed 1/2 Connecting The Battery DX Models OnlyEngine Prestart Checks − DX Model + −350 ft 400 ft 45 m 60 m 70 m 90 m 105 m 120 m Connecting To Weld Output TerminalsSelecting Weld Cable Sizes 150 ft 200 ft 250 ftMaterial Thickness Reference Chart Controls Standard Models See Section − Operating the Welding GeneratorDescription Of Controls Standard Models See Section Stop engine and add oil if light goes on see SectionTo Start Controls DX Models See Section Description Of Controls DX Models See Section Generator Power Panel Receptacles − Operating Auxiliary EquipmentAC Receptacle RC1 Routine Maintenance − MaintenanceServicing Air Cleaner Stop engineStandard Model Shown Adjusting Engine Speed Standard Models Only Stop engine. Close fuel valveTools Needed Adjusting Engine Speed DX Models Only Weld/Power Speed AdjustmentIdle Speed Adjustment Welding − TroubleshootingTroubleshooting Generator PowerEngine Circuit Diagram For Standard Models − Electrical DiagramsCircuit Diagram for DX Models Selecting Equipment − Generator Power GuidelinesAmperes x Volts = Watts Grounding When Supplying Building SystemsHow Much Power Does Equipment Require? Earth ground if supplyingFarm/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 = Starting Amperage Power Required To Start MotorHow Much Power Can Generator Supply? Single-Phase Induction Motor Starting RequirementsTypical Connections To Supply Standby Power Current Load Watts Amperes Selecting Extension Cord Use Shortest Cord PossibleStick Welding Procedure Weld current starts when electrode touches work- piece− Stick Welding Smaw Guidelines Electrode and Amperage Selection Chart Striking an Arc − Scratch Start TechniqueStriking an Arc − Tapping Technique 10-30 9090 End View of Work Angle Poor Weld Bead CharacteristicsGood Weld Bead Characteristics Positioning Electrode HolderElectrode Movement During Welding Conditions That Affect Weld Bead Shape16 in 30 1.6 mm Tack Welds Butt JointsLap Joint Tee JointPossible Causes Corrective Actions Troubleshooting − PorosityTroubleshooting − Excessive Spatter Weld TestTroubleshooting − Incomplete Fusion Troubleshooting − Lack Of PenetrationTroubleshooting − Excessive Penetration Troubleshooting − Burn-Through Troubleshooting − Waviness Of BeadTroubleshooting − Distortion Main Assembly Standard Model − Parts ListDia Part Description Quantity Mkgs 4546 51 41 Main Assembly DX ModelMain Assembly OM-4417 Service Your distributor also givesSupport 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
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145 DX specifications

Miller Electric has established itself as a leading name in the welding industry, and the Miller Electric 145 DX and 145 are notable additions to its lineup of innovative welding machines. Designed to offer versatility and efficiency, these units cater to both novice welders and seasoned professionals seeking reliable equipment for various welding applications.

One of the key features of the Miller Electric 145 DX and 145 is their advanced welding technology. Both models utilize inverter technology, which allows for a compact design while delivering exceptional power. This inverter design not only increases efficiency but also reduces energy consumption, making it an environmentally friendly choice. The lightweight nature of these units makes them highly portable, allowing users to easily transport them to job sites or move them around the workshop.

The Miller Electric 145 DX model incorporates a digital interface that simplifies set-up and operation. This user-friendly digital display shows critical parameters such as voltage and amperage, helping the operator make quick adjustments on-the-fly for optimal results. The advanced Auto-Set feature adjusts the machine settings automatically based on the material thickness and type, significantly reducing the learning curve for inexperienced welders.

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Another noteworthy characteristic of the Miller Electric 145 series is their reliability and durability. Designed with robust components that can withstand challenging working environments, these machines are built to last. The thermal overload protection feature ensures the units do not overheat, safeguarding the internal components and ensuring a longer operational life.

In summary, the Miller Electric 145 DX and 145 stand out in the welding equipment market due to their advanced inverter technology, user-friendly digital interfaces, versatile capabilities, and durability. They are ideal choices for anyone looking to elevate their welding experience, delivering consistent and reliable performance across a variety of projects.
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