Lincoln Electric FLEXTEC 500 P Operator's Manual page 19

FLEXTEC™ 500 P
Use a three-phase supply line. A 1.75 inch (45 mm) diameter access
hole for the input supply is located on the case back. Remove the
reconnect access panel located on the case back and connect L1, L2, L3
and ground according to the Input Supply Connection Diagram decal.
(See Figure B.1)
Figure B.1
Input Fuse and Supply Wire Considerations
Refer to Page A-1 for recommended fuse, wire sizes and type of the
copper wires. Fuse the input circuit with the recommended super lag
fuse or delay type breakers (also called "inverse time" or
"thermal/magnetic" circuit breakers). Choose input and grounding
wire size according to local or national electrical codes. Using input
wire sizes, 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.
Power Supply Access Hole
• Route input power cable through
this hole.
• Strain relief required. See your
local and national electrical codes
for proper strain relief.
Reconnect Terminal Block
• Reconnects auxiliary transformer
for the proper input voltages
Power Supply Terminal Block
• Line Cord/Cable attaches here.
• A ground terminal marked with
• A ground terminal marked with
the symbol shown
the symbol shown is provided
separate from this block for
separate from this block for
connecting the ground lead of the
connecting the ground lead of the
line cord. See your local and
line cord. See your local and
national electrical codes for
national electrical codes for
proper grounding methods.
proper grounding methods.
B-2
INSTALLATION
is provided