Lincoln Electric 275 manual Input and Grounding Connections

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A-4

INSTALLATION

A-4

 

 

 

3.Be sure the torch and work cable rubber coverings are free of cuts and cracks that allow high frequen- cy leakage. Cables with high natural rubber content, such as Lincoln Stable-Arc®, better resist high fre- quency leakage than neoprene and other synthetic rubber insulated cables.

4.Keep the torch in good repair and all connections tight to reduce high frequency leakage.

5.The work terminal must be connected to a ground within ten feet of the welder, using one of the fol- lowing methods:

•A metal underground water pipe in direct contact with the earth for ten feet or more.

•A 3/4" (19 mm) galvanized pipe or a 5/8" (16 mm) solid galvanized iron, steel or copper rod driven at least eight feet into the ground.

The ground should be securely made and the ground- ing cable should be as short as possible using cable of the same size as the work cable, or larger. Grounding to the building frame electrical conduit or a long pipe system can result in re-radiation, effectively making these members radiating antennas. (This is not rec- ommended).

6.Keep all access panels and covers securely in place.

7.All electrical conductors within 50 feet (15.2 m) of the welder should be enclosed in grounded rigid metallic conduit or equivalent shielding. Flexible helically-wrapped metallic conduit is generally not suitable.

8.When the welder is enclosed in a metal building, several good earth driven electrical grounds (as in 5 above) around the periphery of the building are rec- ommended.

INPUT and GROUNDING CONNECTIONS

WARNING

ELECTRIC SHOCK can kill.

•Turn the input power OFF at the disconnect switch or fuse box before working on this equipment.

Be sure the voltage, phase, and frequency of the input power is as specified on the rating plate, located on the rear of the machine.

Fuse the input circuit with the recommended super lag fuses or delay type1 circuit breakers. Choose an input and grounding wire size according to local or national codes or use Section A-2. Using fuses or circuit break- ers smaller than recommended may result in "nui- sance" tripping from welder inrush currents even if not welding at high currents.

Unbalanced AC TIG welding draws higher input cur- rents than those for Stick, DC TIG, or Balanced AC TIG welding. The welder is designed for these higher input currents. However, where unbalanced AC TIG welding above 185 amps is planned, the higher input currents require larger input wire sizes and fuses per Section A-2:

Remove the reconnect panel cover located near the back of the left case side to reveal the reconnect panel. Welder supply line entry provision is in the case rear panel. Entry is through a 1.75 inch (44 mm) diameter hole in the case back. Appropriate supply line strain relief clamp is provided by installer. (See Figure A.1)

FIGURE A.1

CONNECT INPUT

POWER LEADS

CONNECT INPUT

GROUND LEAD

CONNECT INPUT VOLTAGE LEVEL

Failure to observe these recommended installation procedures can cause radio or TV interference prob- lems and result in unsatisfactory welding performance resulting from lost high frequency power.

All connections should be made in accordance with all local codes and national electrical codes. Installation by a qualified electrician is recom- mended.

PRECISION TIG 275

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Contents Precision TIG Safety Depends on YouCalifornia Proposition 65 Warnings SafetyElectric Shock can kill Iii Welding Sparks can cause fire or explosionSûreté Pour Soudage a LʼArc Précautions DE SûretéThank You Table of Contents Precision TIG InstallationRated Input Single Phase only Duty Cycle-Applications Volts at Rated Amperes AmpsAdditional Output Capacity Recommended Input Wire and Fuse SizesPhysical Dimensions Temperature RangesSafety Precautions Input and Grounding Connections Output CABLES, Connections and Limitations Work Cable ConnectionStick Electrode Cable Connection Figure A.2 TIG Torch ConnectionFigure A.3 Auxiliary Power ConnectionsFigure A.4 Robotic Interface ConnectionWelding Sparks OperationProduct Description Pipe ThawingEquipment Limitations Recommended Processes and EquipmentRecommended Processes Process LimitationsFigure B.1 Control Panel Controls and SettingsOperation Digital Display TIG Mode MenuAdvanced Panel Controls Do not USE 4-STEP if Using AN Amptrol RemoteOperation Stick Welding Features Internal SET UP ControlsTIG Welding Features Figure B.3 Figure B.4 Setup Guidelines for TIG Welding With AN Amptrol TIG Weld Cycle ChartFigure B.6 Gtaw Process Making a TIG Weld with AN AmptrolRecommended Electrode Amperage Ranges Precision TIG Smaw ProcessOptional Equipment AccessoriesFactory Installed Options Field Installed OptionsOverload Protection MaintenanceSafety Precautions Routine and Periodic MaintenanceSpark GAP Adjustment Service ProceduresComponent Access UNDER-COOLER Service Meter Calibration AdjustmentHOW to USE Troubleshooting Guide TroubleshootingCourse of Action SymptomsOutput Problems GAS Problems Meter ProblemsHI-FREQ Problems Preset & Output Control Problems TIG Welding Problems Stick Welding ProblemsTIG Problems Wiring Diagram Wiring Diagram Dimension Print K2619-1 Domestic Precision TIG Precision TIG Aviso DE Warnung
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275 specifications

The Lincoln Electric 275 is a versatile multi-process welding machine that stands out for its advanced features and robust performance. Designed for both novice and experienced welders, the machine offers MIG, TIG, and stick welding capabilities, making it a valuable tool for a variety of applications.

One of the main features of the Lincoln Electric 275 is its power output. With an impressive selection of amperage settings, it can deliver between 25 to 275 amps, making it suitable for both thin and thick materials. This flexibility allows users to work on projects ranging from automotive repairs to industrial fabrication.

The machine utilizes inverter technology, which significantly enhances its efficiency and reduces power consumption. Inverter welders are known for their lightweight design and compact size compared to traditional transformer-based welders. This portability makes the Lincoln Electric 275 easy to transport to job sites, catering to both professional and hobbyist welders who require mobility.

Another defining characteristic of the Lincoln Electric 275 is its easy-to-use interface. The digital display provides clear readings, allowing users to effortlessly adjust settings for optimal performance. Additionally, the machine features a user-friendly control panel with distinct knobs for regulating voltage and wire feed speed, assisting welders in achieving precise welds.

The Lincoln Electric 275 is also equipped with advanced arc technologies. Its built-in arc control enhances the stability of the welding arc, resulting in a smoother, more consistent weld. Furthermore, the machine offers synergic controls that automatically adjust the voltage and wire feed speed based on the selected material and thickness, making the welding process more intuitive and reducing the margin for error.

Durability is another hallmark of the Lincoln Electric 275. Constructed with high-quality materials, the machine is built to withstand the rigors of daily use in demanding environments. Its design also incorporates efficient cooling mechanisms to prevent overheating during prolonged operations, ensuring longevity and reliability.

In conclusion, the Lincoln Electric 275 is a powerful and adaptable welding machine that combines advanced technology with user-friendly features. Its multi-process capabilities, inverter technology, and robust construction make it an essential tool for both professional welders and DIY enthusiasts. Whether tackling intricate projects or heavy-duty tasks, the Lincoln Electric 275 proves to be a reliable choice that does not compromise on performance.
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