Electrical Connections; Grounding; High Frequency Interference Protection; Input Fuse And Supply Wire Considerations - Lincoln Electric POWER WAVE SVM135-B Service Manual

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ELECTRICAL CONNECTIONS

WARNING
Only a qualified electrician should connect the
input leads to the Power Wave. 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.
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Use a three-phase supply line. An 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.2.

GROUNDING

The frame of the welder must be grounded. A
ground terminal marked with the symbol
located inside the reconnect/input access door for
this purpose. See your local and national electrical
codes for proper grounding methods. Refer to the
Technical Specifications at the beginning of this
chapter for proper cable sizes.
HIGH FREQUENCY INTERFERENCE
PROTECTION
If possible, locate the Power Wave away from radio
controlled machinery. The normal operation of the
Power Wave may adversely affect the operation of
RF controlled equipment, which may result in bodily
injury or damage to the equipment.
INSTALLATION
INPUT FUSE AND SUPPLY WIRE
CONSIDERATIONS
Refer to the Technical Specifications at the begin-
ning of this Installation section for recommended fuse
and wire sizes. Fuse the input circuit with the recom-
mended 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.
INPUT VOLTAGE RECONNECT
PROCEDURE
Turn main input power to the machine OFF
before performing reconnect procedure. Failure
to do so will result in damage to the machine.
DO NOT switch the reconnect bar with machine
is
power ON.
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Welders are shipped connected for the highest input
voltage listed on the rating plate. To connect to a dif-
ferent input voltage, refer to reconnect instructions
located on the inside of the input access door or in
Figure A.2. If the main reconnect switch is placed in
the wrong position, the welder will not produce output
power. If the Auxiliary ("A") lead is placed in the
wrong position, there are two possible results. If the
lead is placed in a position higher than the applied
line voltage, the welder may not come on at all. If the
Auxiliary ("A") lead is placed in a position lower than
the applied line voltage, the welder will not come on,
and the two circuit breakers in the reconnect area will
open. If this occurs, turn off the input voltage, prop-
erly connect the "A" lead, reset the breakers, and try
again.
POWER WAVE 455/POWER FEED 10
WARNING
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