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C-12
INVERTEC V300-I
ACCESSORIES
CONNECTING TWO V300-I’S
FOR PARALLEL OPERATING
NOTE: The Invertecs can be operated in
parallel in both constant current (CC) and
constant voltage (CV) modes. For best
results, currents of each machine should be
reasonably well shared. As an example,
with two machines set up in parallel for a
400-amp procedure, each machine should
be set to deliver approximately 200 amps,
not 300 amps from one and 100 amps from
the other. This will minimize nuisance feed-
back conditions. In general, more than two
machines in parallel will not be effective due
to voltage requirements of procedures in
that power range.
1. Set machine outputs by starting with out-
put control knob and arc force/pinch con-
trol knob and arc force/pinch control
knob in identical positions. If running in a
CC mode, adjust outputs and arc forces
to maintain current sharing while estab-
lishing proper output current. In CV
modes, output voltage should be set
while keeping both output control knobs
in identical positions. Then switch
machine meters to amps and adjust one
of the output control knobs for current
balance. Check the voltage, and if read-
justment is necessary, repeat the current
balancing step. Pinch settings should
also be kept identical on machines.
