Lincoln Electric IDEALARC IM402-B - Manual (Page 8)

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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
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
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