Lincoln Electric IM905 POWER WAVE 455M - Manual (Page 13)

A-3 INSTALLATION A-3
INPUT CONNECTION
Only a qualified electrician should
c o n n e c t t h e i n pu t l e a d s t o t h e
P o w e r
W a v e 45 5M ( C E ) .
Co n n ec ti o n s s h o u l d be m a de i n
a c c o r d a n c e w i t h a l l l o c a l a n d
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 recommended 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 recom-
mended may result in “nuisance” shut-offs from welder
inrush currents, even if the machine is not being used at
high currents.
NOTE: Turn main inpu ut power to the e machine O OF FF F b be eforre p pe erforrm miin ng c co on nn necttiio on n p pro oc ce ed du urre e.. F Fa aiillu urre e tto o d do o sso o w wiillll
rre essu ulltt iin n d da am ma ag ge e tto o the machine.
WARNING
FIGURE A.1 - CONNECTION DIAGRAM ON CONNECTION/INPUT ACCESS DOOR
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) MINIMUM COPPER
WORK CABLE SIZE AWG
Up To-30 m (100 Ft.
Length) 400 Amps 67 mm 2 (2/0)
500 Amps 85 mm 2 (3/0)
600 Amps 85 mm 2 (3/0)
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.
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
2 2/0
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.
CAUTION
W / L3
V / L2
U / L1
THE LINCOLN ELECTRIC CO. CLEVELAND, OHIO U.S.A.
XA S24190
use or service this equipment.
Do not touch electrically live parts.
removed.
Only qualified persons should install,
Do not operate with covers
inspecting or servicing machine.
Disconnect input power before
.
.
.
.
CR1
INPUT SUPPLY CONNECTION DIAGRAM
POWER WAVE 455M (CE)