Lincoln Electric V155-S - Manual (Page 16)

THEORY OF OPERATION B-2 B-2
INVERTEC® V155-S
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Read and understand this entire section before
operating your machine.
SAFETY INSTRUCTIONS
ELECTRIC SHOCK can kill.
• Do not touch electrically live parts such
as output terminals or internal wiring.
• Insulate yourself from the work and
ground.
• Always wear dry insulating gloves.
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Only qualified personnel should operate this equip-
ment. Observe all safety information throughout this
manual.
GENERAL DESCRIPTION
The INVERTEC® V155-S is an industrial 155 amp arc
welding power source which utilizes single phase input
power, to produce constant current output. The welding
response of this Invertec has been optimized for stick
(SMAW) and Touch Start TIG (GTAW). The unit is ideal
for industrial applications where portability is important.
The INVERTEC® V155-S is recommended for stick
welding with such popular electrodes as Fleetweld 35,
Fleetweld 37, Fleetweld 180 and LH 78. It features
automatic arc control to adjust the arc force, hot start
and anti sticking. The machine also features soft and
crisp modes.
The INVERTEC® V155-S performs DC Touch Start Tig
Starting with excellent results.
WELDING CAPABILITY
The INVERTEC® V155-S is rated at 155 amps, 16.2
volts, at 30% duty cycle on a ten minute basis. It is
capable of higher duty cycles at lower output cur-
rents (1) . If the duty cycle is exceeded, a thermal protec-
tor will shut off the output until the machine cools. See
Technical Specifications in the Installation Section for
other rated outputs.
The INVERTEC® V155-S is recommended for stick
welding with such popular electrodes as Fleetweld
®
35,
Fleetweld 37, Fleetweld 180 and Jet-LH 78 MR. It fea-
tures adjustable arc control to adjust the arc force and
start.
LIMITATIONS
The INVERTEC® V155-S is not recommended for
pipe thawing.
(1) Refer to Technical Specifications in the Installation Section for other ratings.
WARNING
FUMES AND GASES
can be dangerous.
• Keep your head out of fumes.
• Use ventilation or exhaust to
remove fumes from breathing
zone.
ARC RAYS
can burn.
• Wear eye, ear and body
protection.
WELDING, CUTTING and
GOUGING SPARKS
can cause fire or explosion
• Keep flammable material away.
• Do not weld, cut or gouge on
containers that have held com-
bustibles.