Installation; Power Cord Connection; Single Phase Input; Three Phase Input - Lincoln Electric INVERTEC V350-PRO SVM152-A Service Manual

A-3

INSTALLATION

WARNING
ELECTRIC SHOCK can kill.
• TURN THE INPUT POWER OFF AT
THE DISCONNECT SWITCH BEFORE
ATTEMPTING TO CONNECT OR DIS-
CONNECT INPUT POWER LINES, OUTPUT
CABLES, OR CONTROL CABLES.
• Only qualified personnel should perform this
installation.
• Connect the green lead of the power cord to
ground per U.S. National Electrical Code.
--------------------------------------------------------------------
INPUT AND GROUNDING CONNECTIONS
1. Only a qualified electrician should connect the
Invertec V350-PRO. Installation should be made
in accordance with the U.S. National Electrical
Code, all local codes and the information detailed
below.
2. When received directly from the factory, multiple
voltage machines are internally connected for
460VAC. If 460VAC is the desired input, then the
machine may be connected to the power system
without any setup required inside the machine.
3. Initial 200VAC - 415VAC and 575VAC operation
will require an Input voltage panel setup.
• Open the access panel on the rear of the
machine.
• For 200 or 230: Position the large switch to 200-
230.
For higher voltages: Position the large switch to
380-575.
• Move the "A" lead to the appropriate terminal.

POWER CORD CONNECTION

A 10 ft. (3.0m) power cord is provided and wired into
the machine. Follow the power cord connection
instructions. Incorrect connection may result in equip-
ment damage.
LI N
C O
EL LN
EC
TR
IC
IN
WA RNI V E
NG
R T
REM E C
OTE
V 3
5 0
-P
R O
POW
ER
ON
OFF
INSTALLATION

Single Phase Input

1. Connect green lead to ground per U.S. National
Electrical Code.
2. Connect black and white leads to power.
3. Wrap red lead with tape to provide 600V insulation.

Three Phase Input

1. Connect green lead to ground per U.S. National
Electric Code.
2. Connect black, red and white leads to power.
Install in accordance with all local and national
electric codes.

PARALLEL OPERATION

The V350-Pro are operable in parallel in CC mode.
For best results, the currents of each machine should
be reasonably well shared. As an example, with two
machines set up in parallel for a 400 amp procedure,
each machine should be set to deliver approximately
200 amps, not 300 amps from one and 100 amps
from the other. This will minimize nuisance shutdown
conditions. In general, more than two machines in
parallel will not be effective due to the voltage
requirements of procedures in that power range.
To set machine outputs, start with output control pots
and arc control pots in identical positions. Use the
output control pots to balance the currents and main-
tain the desired voltage or current. The arc control
pots should be kept identical on the two machines.

QUICK DISCONNECT PLUGS

A quick disconnect system is used for the welding
cable connections. The welding plug included with the
machine is designed to accept a welding cable size of
1/0 to 2/0.
1. Remote 25mm (1 in.) of welding cable insulation.
2. Slide rubber boot onto cable end. The boot end
may be trimmed to match the cable diameter.
Soap or other lubricant will help to slide the boot
over the cable.
WELDING CABLE
BLACK
GREEN
RED
WHITE
3. Slide the copper tube into the brass plug.
4. Insert cable into copper tube.
V350-PRO
25 mm
TRIM
1 in.
A-3
BOOT