Input and Grounding Connections

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.

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

IM702-A specifications

The Lincoln Electric IM702-A is a versatile and innovative welding machine that has garnered attention for its advanced features and robust performance. Designed for various welding applications, the IM702-A is a go-to choice for professionals in the industry, offering precision, reliability, and ease of use.

One of the standout characteristics of the IM702-A is its advanced inverter technology. This allows for a lightweight and compact design, making it easier to maneuver in tight spaces compared to traditional welding machines. The inverter technology also contributes to energy efficiency, reducing power consumption without compromising on performance.

The IM702-A features a multi-process capability, enabling it to perform MIG, TIG, and Stick welding with ease. This versatility makes it ideal for a wide range of projects, from industrial manufacturing to home repairs. Users can seamlessly switch between different welding processes, enhancing productivity and streamlining workflow.

In terms of user interface, the Lincoln Electric IM702-A is designed with convenience in mind. It boasts a digital display that provides real-time information on welding parameters, making it easier for operators to monitor and adjust settings as needed. The intuitive controls are user-friendly, allowing even novice welders to achieve professional-quality results.

The machine also includes advanced weld control features, such as precise amperage and voltage adjustments. These controls ensure that users can achieve optimal settings for different materials and thicknesses, resulting in clean, strong welds. Additionally, the IM702-A is equipped with an automatic voltage adjustment feature, which helps maintain consistent performance under varying input conditions.

Durability is another key selling point for the IM702-A. Built with high-quality materials and engineering, this welding machine is designed to withstand the rigors of daily use in demanding environments. Its rugged construction provides reliability and longevity, ensuring that it remains a valuable asset in any workshop.

Lastly, safety is a priority in the design of the IM702-A. It includes several built-in safety features, such as thermal overload protection and a stabilized arc performance that reduces the risk of arc blow, protecting both the operator and the equipment.

Overall, the Lincoln Electric IM702-A stands out in the welding market due to its advanced technologies, multi-process capabilities, user-friendly interface, and robust safety features, making it an excellent choice for professional welders seeking high-quality performance and versatility.

Lincoln Electric IM702-A manual Input and Grounding Connections

Models: IM702-A

INSTALLATION