Installation, Input connection, Input fuse and supply wire considerations – Lincoln Electric IM807 POWER WAVE 455M User Manual

Page 13: Warning, Electrode and work cable connections, Caution

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A-3

INSTALLATION

A-3

INPUT CONNECTION

Only a qualified electrician should
connect the input leads to the
Power Wave 455M (CE).
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.

NOTE: Turn main input power to the machine OFF before performing connection procedure. Failure to

do so will result in damage to 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)

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