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Section 2
electrical
DANGER
It is recommended that a line disconnect switch be installed in the input circuit to the welding power source. This
provides a safe and convenient means to completely remove all electrical power from the welding power supply whenever it
is necessary to perform any work on it
Before making the electrical input connections to the welding power source, "machinery lockout procedures" should be
employed. If the connection is to be made from a line disconnect switch, the switch should be padlocked in the open
position. If the connection is made from a fuse box, remove the fuses from the box and padlock the cover in the closed
position. If the unit is connected to a circuit breaker, or other disconnecting device without locking facilities, attach a red tag
to the device to warn others that the circuit is being worked on.
Connect the input conductors to the welding
power source before making connections to
the three-phase input voltage. Check the
input voltage jumper link arrangement
on the main weld transformer and
control transformer to make sure the
transformer is connected correctly for
the incoming line voltage.
The ground terminal is connected
to the welding power supply frame
and is for grounding purposes only.
Do not connect a conductor from
the ground terminal to any of the
line terminals. This will result in an
electrically energized (HOT) power
supply frame.
Always connect the input grounding
conductor to the long 1/4-20 stud
on the base panel first. This stud
will already have green or green
with yellow stripe wires connected
to it.
ALL electrical connections should be made by a properly certified
electrical professional.
Control Transformer Jumper Links
Control Transformer
Control Transformer Fuse
Installation & Set Up
1
L1
L2
L3
Input Contactor
12 Position
Barrier Strip
GND/PE
Green or Green With
Yellow Stripe(s)
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