Miller Electric 251 NT manual Panel, Front w/Components

Page 45

Item

Dia.

Part

Description

 

No.

Mkgs.

No.

Quantity

 

 

 

Figure 10-1. Main Assembly (Continued)

 

 

 

 

 

 

. . . . . . . . . .

RC1 . . .

174 824 . .

CONNECTOR & PINS

. . . 1

. . . . . . . . . .

PLG1 . . .

174 823 . .

CONNECTOR & SOCKETS

. . . 1

. . . . . . . . . .

PLG3 . . .

135 275 . .

CONNECTOR & SOCKETS

. . . 1

. . . . . . . . . .

PLG6 . . .

174 823 . .

CONNECTOR & SOCKETS

. . . 1

. . . . . . . . . .

RC6 . . .

174 824 . .

CONNECTOR & PINS

. . . 1

. . . . . . . . . .

PLG9 . . .

168 071 . .

CONNECTOR & SOCKETS

. . . 1

. . . 42 . . . .

C52 . . .

176 007 . .

CAPACITOR, slectl 1200uf 300VDC

. . . 1

. . . 43 . . . .

. . . . . . . . .

176 199 . .

CLAMP, capacitor

. . . 2

. . . 44 . . . .

. 1T . . . .

172 661 . .

BLOCK, stud connection 6posn (consisting of)

. . . 1

. . . . . . . . . .

. . . . . . . . .

173 734 . . .

. JUMPER LINK

. . . 2

. . . 45 . . . .

. . . . . . . . .

172 731 . .

HOLDER, fuse mintr

. . . 2

. . . 46 . . .

F1, F2 . . *169 296 . .

FUSE, mintr gls 25A 125V

. . . 2

. . . 47 . . . .

SR2,3 . .

035 704 . .

RECTIFIER, integ 40A 800V

. . . 2

. . . 48 . . . .

. D2 . . . .

135 184 . .

DIODE, board

. . . 1

. . . 49 . . . .

. C1 . . . .

176 719 . .

CAPACITOR, electl 1000uf 75VDC

. . . 1

. . . 50 . . . .

. . . . . . . . .

177 136 . .

CLAMP, capacitor

. . . 1

. . . 51 . . . .

CT1 . . .

187 144 . .

TRANSFORMER, current sensing

. . . 1

. . . 52 . . . .

R4,5 . . .

139 812 . .

RESISTOR, WW fxd 30W 5K

. . . 2

. . . 53 . . . .

. . . . . . . . .

180 628 . .

PANEL, lower front

. . . 1

. . . 54 . . . .

. . . . . . . . .

Fig 10-2 . .

PANEL, front w/components

. . . 1

. . . 55 . . . .

. . . . . . . . .

197 930 . .

LABEL, warning do not weld on base

. . . 2

. . . . . . . . . .

. F6 . . . . *021 718 . .

FUSE, mintr gl 30A 32V

. . . 1

. . . . . . . . . .

. . . . . . . . .

137 046 . .

TUNE-UP & FILTER KIT, (consisting of)

. . . 1

. . . . . . . . . .

. . . . . . . . .

064 617 . . .

. ELEMENT, air cleaner

. . . 1

. . . . . . . . . .

. . . . . . . . .

065 251 . . .

. OIL FILTER

. . . 1

. . . . . . . . . .

. . . . . . . . .

121 652 . . .

. FILTER/CLAMPS, fuel

. . . 1

♦. .Optional

. . . . . . . . .

065 709 . . .

. SPARK PLUG

. . . 2

*Recommended Spare Parts.

 

+When ordering a component originally displaying a precautionary label, the label should also be ordered.

To maintain the factory original performance of your Replacement Parts. Model and serial number required

equipment, use only Manufacturer’s Suggested when ordering parts from your local distributor.

 

 

4

 

5

 

 

 

 

 

 

3

 

 

. Hardware is common and

2

 

 

9

not available unless listed.

1

 

 

 

 

 

8

10

 

 

 

 

 

 

11

 

 

 

 

 

 

6

7

12

 

35

 

 

 

 

 

 

34

 

 

14

 

 

 

 

13

 

33

 

 

15

 

32

 

 

16

 

31

 

 

17

 

 

 

 

 

30

 

 

 

 

29

 

 

18

 

 

 

19

 

28

 

 

 

 

 

 

 

 

 

 

20

 

 

23

 

21

 

25

24

 

 

 

26

 

 

22

 

 

 

 

 

27

 

 

 

ST-802 049-B

Figure 10-2. Panel, Front w/Components

OM-486 Page 41

Page 44 Page 46
Image 45
Page 44 Page 46
Contents OM-486 ProcessesDescription 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 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 cardiaquesSymbol Definitions SpecificationsWeld, Power, And Engine Specifications DefinitionsDimensions, Weights, and Operating Angles DimensionsFuel Consumption Auxiliary Power Curve Exceeding duty cycle can damage unit and void warrantyDuty Cycle CV/DC Mode CC/DC ModeCC/AC Mode Volt-Ampere CurvesInstallation Installing Welding GeneratorEngine Prestart Checks Do not overfill battery cells Activating The Dry Charge Battery If ApplicableRead and follow all instruc ChargerInstalling Exhaust Pipe Connecting The BatteryConnecting To Weld Output Terminals Connect negative cable lastRemote 14 Receptacle Information Selecting Weld Cable Sizes100 ft 30 m Or Less 10 100% Duty CycleStop engine Adjusting MIG Weld Puddle ConsistencyTo wet out weld puddle To stiffen weld puddleDo not switch under load DC Polarity/AC SwitchRemote Amperage/Voltage Switch Operating Welding GeneratorRemote Amperage/Voltage Control Auxiliary Power Receptacles And Circuit Breakers Operating Auxiliary EquipmentWeld Current 120 240 Gfci Receptacle Option Optional Auxiliary Power ReceptaclesMaintenance and Troubleshooting Maintenance Label Servicing Air Cleaner Servicing Optional Spark ArrestorStop engine and let cool Changing Engine Oil, Oil Filter, And Fuel Filter Adjusting Engine Speed Idle Speed AdjustmentWeld/Power Speed Adjustment Overload Protection TroubleshootingWelding Trouble RemedyCheck and clean air cleaner as necessary see Section Low weld output Check control settingsCheck and adjust engine speed see Section See engine manualCheck receptacle wiring and connections Auxiliary PowerEngine Check governor according to engine manualCircuit Diagram For Welding Generator Electrical DiagramST-190 578-B 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 x240 120 Ground Typical Connections To Supply Standby PowerCurrent Load Watts Amperes Selecting Extension Cord Use Shortest Cord PossibleParts List Main Assembly24-Fig Dia Part Description Mkgs Quantity Panel, Front w/Components Panel, Front w/Components -1 Item Generator -1 Item Page Page Page Service Your distributor also givesSupport Miller Electric Mfg. Co Owner’s Record

251 NT specifications

The Miller Electric 251 NT is a highly regarded multi-process welding machine known for its versatility and advanced features, making it an ideal choice for professionals in various industries. With its robust construction and user-friendly interface, the 251 NT provides an efficient solution for MIG, TIG, and Stick welding applications.

One of the main features of the Miller Electric 251 NT is its impressive output range, which allows for welding on a variety of materials and thicknesses. It delivers up to 250 amps of power, enabling users to tackle both thin and thick metals with ease. Additionally, the machine is equipped with an Auto-Set feature, which automatically adjusts the welding settings according to the material thickness and type. This eliminates the guesswork, significantly enhancing productivity and reducing setup time.

Another noteworthy aspect of the Miller Electric 251 NT is its inverter technology. This advanced technology provides a compact, lightweight design without compromising performance. Inverter technology allows for greater energy efficiency, resulting in reduced operational costs over time. The 251 NT also features a Duty Cycle of 60% at 250 amps, which means it can handle demanding tasks while maintaining optimal performance.

The Miller Electric 251 NT is designed with user convenience in mind. The intuitive digital display offers clear visibility of the settings, allowing welders to make quick adjustments. Furthermore, the machine includes a built-in memory function to store frequently used parameters, enhancing workflow efficiency.

Safety is a key component of the 251 NT's design. It comes equipped with various safety features, including overload protection and a thermal overload warning system. These features ensure that the machine operates within safe limits, minimizing the risk of damage and ensuring longevity.

In terms of portability, the Miller Electric 251 NT's lightweight design and integrated handle make it easy to transport between job sites. The durable housing protects the internal components, making it suitable for rigorous use in demanding environments.

Overall, the Miller Electric 251 NT offers a combination of power, flexibility, and ease of use, making it a top choice for welders looking to enhance their capabilities across multiple welding processes. Whether in a professional shop or on a construction site, the 251 NT stands out as a reliable and efficient welding solution.
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