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INSTALLATION

INVERTER ARC 120

INSTALLATION

TECHNICAL SPECIFICATIONS - 

­K2789-2­-­Inverter­Arc­120­

Thermal tests have been performed at ambient temperature. The duty

cycle (duty factor) at 40°C has been determined by simulation.

SAFETY PRECAUTIONS

ELECTRIC SHOCK can kill.

Only qualified personnel should
perform this installation.

Disconnect input power by removing
plug from receptacle before working
inside Inverter Arc 120 Allow machine
to sit for 5 minutes minimum to allow
the power capacitors to discharge before working
inside this equipment.

Insulate yourself from the work and ground.

Always wear dry insulating gloves.

• 

Always connect the Inverter Arc 120 to a power supply
grounded according to the National Electrical Code and
local codes.

SELECT SUITABLE LOCATION

This machine can operate in harsh environments.  

However, it is important that simple preventative measures are
followed to assure long life and reliable operation:

•  This machine must be located where there is free circulation

of clean air without restrictions for air movement to and from
the air vents.  Do not cover the machine with paper, cloth or
rags when switched on.

•  Dirt and dust that can be drawn into the machine should be

kept to a minimum.

•  This machine has a protection rating of IP21S.  Keep it dry

and do not place it on wet ground or in puddles. Do not use in
wet or damp locations. Store indoors.

•  Locate the machine away from radio controlled machinery.

Normal operation may adversely affect the operation of
nearby radio controlled machinery, which may result in injury
or equipment damage.  Read the section on electromagnetic
compatibility in this manual.

•  Do not operate in areas with an ambient temperature greater

than 40°C.

STACKING

The Inverter Arc 120  cannot be stacked.

TILTING

Place the machine directly on a secure, level surface. Do not place
or operate this machine on a surface with an incline greater than
15° from horizontal. The machine may topple over if this
procedure is not followed.

HIGH FREQUENCY PROTECTION

Locate the Inverter Arc 120 away from radio controlled machinery.
The normal operation of the Inverter Arc 120 may adversely affect
the operation of RF controlled equipment, which may result in
bodily injury or damage to the equipment.

INPUT - SINGLE PHASE ONLY

Input Voltages 60 Hz.

Rated Input Current

120VAC ± 15% 

20 AMPS @ RATED OUTPUT

RATED OUTPUT

Duty Cycle

Output Amps

Output Volts Input Circuit

20%

70A (STICK)

22.8 VDC

120 VAC 

OUTPUT

Output Current Range

Maximum Open 

Circuit Voltage

Type of Output

10-90 AMPS

75  VOLTS  MAX.

DC

RECOMMENDED INPUT WIRE AND FUSE SIZES FOR

MAXIMUM RATED OUTPUT

INPUT VOLTAGE /

FREQUENCY (HZ)

TYPE SJT OR

HARD USAGE

INPUT CORD

MAXIMUM TIME-DELAY

CIRCUIT BREAKER OR FUSE

SIZE (AMPS)

120/60

3 CONDUCTOR,

14 AWG

20

PHYSICAL DIMENSIONS

Height

9.0 IN. (228.6 MM)

Width

4.5 IN. (114.3 MM)

Depth

13.7 IN. (348.0  MM)

Weight

APPROX. 14.0 LBS. (6.4  KGS.)

TEMPERATURE RANGES

Operating

Temperature

-10°C TO +40°C

Storage

Temperature

-25°C TO +55°C

WARNING

Summary of Contents for INVERTER ARC 120

Page 1: ...Need Help Call 1 888 935 3877 to talk to a Service Representative Hours of Operation 8 00 AM to 6 00 PM ET Mon thru Fri After hours Use Ask the Experts at lincolnelectric com A Lincoln Service Represe...

Page 2: ...A LARGE ROOM OR OUTDOORS natural ventilation may be adequate if you keep your head out of the fumes See below USE NATURAL DRAFTS or fans to keep the fumes away from your face If you develop unusual s...

Page 3: ...rs and devices in position and in good repair Keep hands hair clothing and tools away from V belts gears fans and all other moving parts when starting operating or repairing equipment 1 e In some case...

Page 4: ...to ANSI Z87 I standards 4 b Use suitable clothing made from durable flame resistant material to protect your skin and that of your helpers from the arc rays 4 c Protect other nearby personnel with su...

Page 5: ...nt passing through lifting chains crane cables or other alternate circuits This can create fire hazards or overheat lifting chains or cables until they fail 6 h Also see item 1 c 6 I Read and follow N...

Page 6: ...N B 1 WELDING CAPABILITY B 1 LIMITATIONS B 1 CONTROLS AND OPERATIONAL FEATURES B 2 ARC WELDING CIRCUIT B 3 ELECTRIC ARC B 3 MAKING A WELD B 4 OPTIONAL KITS AND ACCESSORIES SECTION C MAINTENANCE SECTIO...

Page 7: ...Locate the machine away from radio controlled machinery Normal operation may adversely affect the operation of nearby radio controlled machinery which may result in injury or equipment damage Read th...

Page 8: ...tripping action that decreases as the mag nitude of the current increases The Inverter Arc 120 is recommended for use on an individual branch circuit 120v INPUT The INVERTER ARC 120 is provided with...

Page 9: ...trations of these fumes and gases Use adequate ventilation when welding See ANSI Z49 1 Safety in Welding and Cutting published by the American Welding Society Only qualified personnel should operate t...

Page 10: ...s been disabled This normally occurs when the duty cycle of the machine has been exceeded Leave the machine on to allow the internal components to cool When the indicator turns off normal operation is...

Page 11: ...electric current flowing through the space between the end of the electrode and the work The temperature of this arc is about 6000 F 3315 C which is more than enough to melt metal The arc is very bri...

Page 12: ...siest way to tell whether the arc has the correct length is by listening to its sound A nice short arc has a distinctive crackling sound very much like eggs frying in a pan The incorrect long arc has...

Page 13: ...C 1 ACCESSORIES OPTIONAL KITS AND ACCESSORIES INVERTER ARC 120...

Page 14: ...W TO USE TROUBLESHOOTING GUIDE Service and Repair should only be performed by Lincoln Electric Factory Trained Personnel Unauthorized repairs performed on this equipment may result in danger to the te...

Page 15: ...o low 2 Adjust welding output higher Electrode Sticking 1 Arc length is too short 1 Move the electrode further away from the weld joint 2 Welding current is too low 2 Turn the output knob up Porosity...

Page 16: ...is pasted inside the machine on one of the enclosure panels If the diagram is illegible write to the Service Department for a replacement Give the equipment code number HT OUT Iac v 12 12 12 2 5 3 6 4...

Page 17: ......

Page 18: ...parts or electrode with skin or wet clothing l Insulate yourself from work and ground l No toque las partes o los electrodos bajo carga con la piel o ropa moja da l Aislese del trabajo y de la tierra...

Page 19: ...d Entl ftung des Arbeitsplatzes l Mantenha seu rosto da fuma a l Use ventila o e exhaust o para remover fumo da zona respirat ria l Turn power off before servicing l Desconectar el cable de ali mentac...

Page 20: ...with respect to such information or advice As a matter of practical consideration we also cannot assume any responsibility for updating or correcting any such information or advice once it has been gi...

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