A-6

INSTALLATION

A-6

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When mounting the welding head to the standard travel carriage, (see 305-B sec. T2.2.4) mount it so only a minimum of overhang weight exists. Mount the head so it stays within the dimension shown in Figure A.5.

FIGURE A.5 – MOUNT TO CARRIAGE

OVERHANG DIMENSION.

nection diagrams for connecting automatic welding systems to various welding power sources.

INPUT POWER REQUIREMENTS

350volt-amperes of 115 VAC 50/60 Hz power is required for the wire feed motor and controls. Another 250 volt-amperes may be required depending on the travel circuit.

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19IN.

(483 MM)

ELECTRICAL

INSTALLATION

WARNING

ELECTRIC SHOCK can kill.

Do not touch electrically live parts such as output terminals or internal wiring.

This section provides information on proper wiring procedures for the NA-5 welding sys- tem. This section also provides basic con-

CONTROL BOX TO WELDING HEAD CONNECTIONS

All welding heads include a 4 ft (1.2 m) motor cable and motor tachometer cable. Insert the plugs on these cables into the matching receptacles on the side of the control box.

If the 4 ft (1.2 m) cables are not sufficient, install a K335 or K338 control to head extension cable of the length ordered [up to 30 ft (9.1 m)]. The K335, for the NA-5S head, includes motor, tachometer and flux hopper lead extensions with polarized plugs on each end, and electrode cables. The K338 for the NA-5N, NF, and SF heads is the same as the K335 without the flux hopper lead extension.

The NA-5N and NA-5S also include two 4 ft (1.2 m) lengths of electrode cable. Bolt the terminals at one end of the the cable pair to the wire contact assembly and the terminals at the other end to the electrode leads on the power source to control cable assembly. Properly insulate the bolted connection. When the K335 or K338 extension cables are used between the controls and heads, the 4 ft (1.2 m) lengths of electrode cable are not used. If currents or duty cycles higher than 1000 amps at 80% duty cycle will be used, add additional electrode cable per Table A.1.

TABLE A.1

 

80% Duty Cycle

 

 

Below 1000 amps

Two 4/0

 

 

1000 to 1300 amps

Three 4/0

 

 

1300 to 1500 amps

Four 4/0

 

 

NA-5

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Lincoln Electric NA-5NF, NA-5S Electrical Installation, Input Power Requirements, Control BOX to Welding Head Connections

NA-5S, NA-5N, NA-5SF, NA-5NF specifications

The Lincoln Electric NA-5NF, NA-5SF, NA-5N, and NA-5S are advanced welding helmets that are pivotal in enhancing the safety and efficiency of welders in various applications. These models are designed to provide exceptional protection and visibility, making them indispensable tools in the welding industry.

One of the main features of the NA-5 series is the auto-darkening filter technology. This feature allows the helmet to automatically adjust its shade based on the intensity of the arc. As the welder strikes an arc, the lens darkens instantaneously, shielding the eyes from harmful rays generated during the welding process. This functionality not only ensures safety but also enhances productivity, as welders do not need to manually flip the helmet up and down.

The helmets are equipped with a wide viewing area that allows for better visibility and precision while working. With a large lens, welders can easily monitor their work and surrounding environment, minimizing the risk of accidents. Additionally, the lightweight design of the NA-5NF, NA-5SF, NA-5N, and NA-5S provides comfort during extended periods of use, reducing neck strain and fatigue.

The NA-5 series is also well-regarded for its durability. Constructed from impact-resistant materials, these helmets can withstand the rigors of demanding work environments. This durability extends the lifespan of the helmet, making it a cost-effective investment for both professional and hobbyist welders.

Another notable characteristic is the adjustable sensitivity and delay settings found in certain models. These settings allow the user to customize the helmet based on their specific welding conditions. For instance, a welder can increase sensitivity for low-amperage tasks or adjust the delay to allow for a smoother transition from dark to light after completing a weld.

Furthermore, the helmets come with a reliable battery life, ensuring that they can be used for long periods without interruption. Some models also feature solar assist functionality, which helps recharge the auto-darkening filter, enhancing their overall efficiency.

In summary, the Lincoln Electric NA-5NF, NA-5SF, NA-5N, and NA-5S welding helmets represent a significant advancement in personal protective equipment for welders. Their combination of auto-darkening technology, wide viewing area, lightweight design, durability, and customizable settings makes them an excellent choice for anyone engaged in welding tasks. With these helmets, users can achieve greater safety and efficiency in their work, enabling them to focus on their craft with peace of mind.