Lincoln Electric IM402-B manual General Description, Recommended Processes and Equipment

GENERAL DESCRIPTION

The Idealarc® 250 is a single phase constant current arc welding power source available in an AC/DC model only. Designed for stick welding, it may also be used for TIG welding when used with the K799 Hi- Freq unit.

RECOMMENDED PROCESSES AND EQUIPMENT

AC and DC Constant Current Welding

AC	35-300 Amps 60 Hz		35-250 Amps 50 Hz
DC	40-250 Amps 50/60 Hz
Duty Cycle		60 Hz		50 Hz
		100%-140 Amps		100%-140 Amps
		50%-200 Amps		60%-180 Amps
		30%-250 Amps		30%-250 Amps
		20%-300 Amps

TIG Welding

The K799 can be used with this machine to provide high frequency stabilization and a gas valve for TIG welding. It operates on 115V 50/60 Hz power. A water valve (for water cooled TIG torches) is available as an option.

When TIG welding, AC or DC may be used but when AC TIG welding, the duty cycle must be decreased by one-half.

DESIGN FEATURES

•Power On/Off switch.

•Polarity switch selects AC, DC+ or DC- .

•Continuous current control dials with exact welding current needed for each job. Settings are precise and free from creep.

•Spring loaded knob on the continuous current control crank pulls out for easy adjustment and snaps back out of the way when released.

•Meets NEMA Class II specifications.

•Recessed front panel protects controls.

•Large safety margins and protective circuits protect rectifiers from transient voltages and high currents.

•Submersion dipping of assembled transformer and choke in special sealing/insulating material gives extra protection against moisture and corrosive atmosphere.

•Stackability - Machines can be stacked up to three high.

•Outstanding Arc Stability - Transformer design and built-in stabilizer provide pop-out-resistant welding with all electrodes, including those which normally require an industrial type AC welder.

•Reconnect panel is provided to permit changing from one input voltage to another without reconnect- ing transformer leads.

OPTIONS / ACCESSORIES AND COMPATIBLE LINCOLN EQUIPMENT

Factory Installed Options/Accessories

•Power Factor Capacitors

(Reduce input amps by 30% at rated load.)

Field Installed Options

• Power Factor Capacitors

(Reduce input amps by 30% at rated load.)

•Undercarriage (K866)

Consists of a handle, axle, wheels, front bracket and mounting hardware. Overall width 24.56 inches (624 mm).

•Hi Freq Kit (K799)

Converts Idealarc 250 into a TIG welder. Request Bulletin E385 for full details.

•Standard Accessory Kit (K710)

Includes electrode holder, work clamp, electrode, work cables, and headshield with lens and coverplate

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