Input Power Connection - Lincoln Electric INVERTEC V155-S 11327 Operator's Manual

A-3

INPUT POWER CONNECTION

Check the input voltage, phase, and frequency sup-
plied to this machine before turning it on. The allow-
able input voltage is indicated in the technical specifi-
cation section of this manual and on the rating plate of
the machine. Be sure that the machine is grounded.
Make sure the power available at the input connection
is adequate for normal operation of the machine. The
fuse rating and cable sizes are both indicated in the
technical specification section of this manual.
Fuse the input circuit with time delay fuses marked "D"
or delay type 1 circuit breakers. Using fuses or circuit
breakers smaller than recommended may result in
"nuisance" shut-offs from welder inrush currents even
if not welding at high currents.
1
Also called "inverse time" or "thermal/magnetic" circuit breakers.
These circuit breakers have a delay in tripping action that
decreases as the magnitude of the current increases.
The Invertec V155-S is recommended for use on an
individual branch circuit.
120V INPUT
The rated output of the V155-S is available when con-
nected to a 30A branch circuit. When connected to a
branch circuit with lower ampacity, lower welding cur-
rent and duty cycle must be used. An output guide is
provided below. The values are approximate and must
be adjusted downward if the fuse or circuit breaker
trips off. Other loads on the circuit and fuse/circuit
breaker characteristics will affect the available output.
Do not exceed these welding conditions: (See Table
A.1)
The Invertec V155-S is provided with a 120/230V
cable, 6.6ft.(2m) in length, with a 15Amp 5-15P plug
molded onto the cord.
The V155-S is supplied with an additional 20A plug
that can replace the 15A plug to achieve higher out-
put. To install the supplied 20A plug:
Connect the white (neutral) wire under terminal clamp
with silver screw, and black (hot) wire under terminal
clamp with brass screw. Connect green wire under
terminal clamp with green screw.
120V Input
Plug Branch
10% Duty
Rating Rating Cycle
15 Amp 15 Amp 65A
15 Amp 20 Amp 75A
20 Amp 20 Amp 85A
INSTALLATION
TABLE A.1
BRANCH
Output Current
Stick
30% Duty 100% Duty 10% Duty
Cycle Cycle
Cycle
45A
55A
70A 60A
75A 60A
V155-S
• Failure to wire as instructed may cause personal
injury or damage to equipment. To be installed or
checked by an electrician or qualified person
only.
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230V INPUT
To achieve the full output capacity of the V155-S,
230VAC inputs should be used. The change over is
accomplished by replacing the 120VAC plug with a 30
Amp 230VAC plug (NEMA 6-30P).
ATTACHMENT PLUG
In all cases, the green or green/yellow grounding wire
must be connected to the grounding pin of the plug, usu-
ally identified by a green screw.
All attachment plugs must comply with the Standard for
Attachment Plugs and Receptacles, UL498.
The product is considered acceptable for use only when
an attachment plug as specified is properly attached to
the supply cord.
The Invertec V155-S will auto reconnect to either
120V or 230V supplies.
ENGINE DRIVEN GENERATOR
The machine is designed to operate on engine driven
generators as long as the auxiliary can supply ade-
quate voltage, frequency and power as indicated in
the "Technical Specification" Installation Section of
this manual. The auxiliary supply of the generator
must also meet the following conditions:
• Vac peak voltage: below 205V (for 115Vac input) or
• Vac frequency: in the range of 50 and 60 Hertz.
• RMS voltage of the AC waveform: 115Vac or
It is important to check these conditions because
many engine driven generators produce high voltage
spikes. Operation of this machine with engine driven
generators not conforming to these conditions is not
recommended and may damage the machine.
TIG
30% Duty 100% Duty
Cycle Cycle
100A 85A 75A
110A 100A 95A
130A 130A 95A
WARNING
410V (for 230Vac input).
230Vac ± 10%
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