Input Connection; Input Fuse And Supply Wire Considerations; Electrode And Work Cable Connections - Lincoln Electric POWER WAVE 455 M Operator's Manual

A-3
FIGURE A.1 - CONNECTION DIAGRAM ON CONNECTION/INPUT ACCESS DOOR
THE LINCOLN ELECTRIC CO. CLEVELAND, OHIO U.S.A.
XA
NOTE: Turn main input power to the machine OFF before performing connection procedure. Failure to
do so will result in damage to the machine.

INPUT CONNECTION

WARNING
Only a qualified electrician should
connect the input leads to the
Power
Connections should be made in
accordance with all local and
national electrical codes and the connection dia-
gram located on the inside of the reconnect/input
access door of the machine. Failure to do so may
result in bodily injury or death.
-------------------------------------------------------------
Use a three-phase supply line. A 45 mm (1.75 inch)
diameter access hole for the input supply is located on
the upper left case back next to the input access door.
Connect L1, L2, L3 and ground according to the Input
Supply Connection Diagram decal located on the
inside of the input access door or refer to Figure A.1.
INPUT FUSE AND SUPPLY WIRE
CONSIDERATIONS
Refer to the Technical Specifications at the beginning
of this Installation section for recommended fuse and
wire sizes. Fuse the input circuit with the recommend-
ed super lag fuse or delay type breakers (also called
"inverse time" or "thermal/magnetic" circuit breakers).
Choose an input and grounding wire size according to
local or national electrical codes. Using fuses or circuit
breakers smaller than recommended may result in
"nuisance" shut-offs from welder inrush currents, even
if the machine is not being used at high currents.
INSTALLATION
INPUT SUPPLY CONNECTION DIAGRAM
.
Disconnect input power before
inspecting or servicing machine.
.
Do not operate with covers
removed.
.
Do not touch electrically live parts.
. Only qualified persons should install,
use or service this equipment.
W / L3
V / L2
CR1
U / L1
Wave 455M (CE).
POWER WAVE 455M (CE)
S24190
ELECTRODE AND WORK CABLE
CONNECTIONS
Connect a work lead of sufficient size and length (Per
Table 1) between the proper output terminal on the
power source and the work. Be sure the connection to
the work makes tight metal-to-metal electrical contact. To
avoid interference problems with other equipment and to
achieve the best possible operation, route all cables
directly to the work and wire feeder. Avoid excessive
lengths and do not coil excess cable.
Minimum work and electrode cable sizes are as follows:
TABLE A.1
Current (60% Duty Cycle)
Length) 400 Amps
500 Amps
600 Amps
NOTE: K1796 coaxial welding cable is recommended to
reduce the cable inductance in long cable lengths. This
is especially important when Pulse welding up to 350
amps.
CAUTION
When using inverter type power sources like the
Power Waves, use the largest welding (electrode and
work) cables that are practical. At least 67 mm
copper wire - even if the average output current
would not normally require it. When pulsing, the
pulse current can reach very high levels. Voltage
drops can become excessive, leading to poor weld-
ing characteristics, if undersized welding cables are
used.
A-3
MINIMUM COPPER
WORK CABLE SIZE AWG
Up To-30 m (100 Ft.
2
67 mm (2/0)
2
85 mm (3/0)
2
85 mm (3/0)
2
2/0