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GENERAL DESCRIPTION
The CITOTIG 315DC & 415DC are inverter based
welding power sources that offers multi-mode
(TIG and Stick) constant current welding. The
machines can be operated on three phase input
power 400Vac. The welding response of these
UNITS have been optimized for the stick
welding processes with and
and TIG (GTAW)
without HF ignition.
INPUT LINE VOLTAGE,
AUXILIARY VOLTAGE AND
PRECHARGE
The 400V 3phases input power AC is connected
to the machine, through an input cable, to the
main switch located on the back of the power
source. Once 400 Vac +/- 15% voltage is applied
to the machine via the input switch, the following
activities will be managed by the input board
W05X1328 (-2 version for the 415DC):
The auxiliary power supplies (+24, +15V, -
5V) to all the boards will be generated.
A uController on the input board manages
the soft stat and pre-charge operation. If
the uController is correctly programmed
LED LD2 on the input board is turned ON.
INPUT SECTION
(SMAW)
After the pre-charge phase, another 1
Under and over voltage control and alarm
Fan and Water Cooler supply, when
23
During this phase a signal called
o
READY_OK signals to the control
board that the machine is not still
working; the green led on the
front panel is blinking during this
phase.
If the input power supply is in the
o
correct range, the uController on
the input board wait about 4
seconds before to short the pre-
charge relay that shorts the pre-
charge power resistance (PTC) to
let the pre-charge of the input
capacitors.
second is necessary for the uController to
release the READY_OK signal to the
control board. After that, the control board
signals to the user that the machine is
ready to go keeping the from panel green
led always turned ON.
activation signals arrive from the control
board
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