Operator`s manual

STORAGE
The RED-D-ARC MX350 may be set on a floor, or
shelf, horizontally on its skid, or vertically standing on
i
ts rear top and bottom handles.
PROTECTION FEATURES
The RED-D-ARC MX350 design features electronic
protection systems to help assure reliable operation
even under adverse conditions. These systems
include:
FAN AS NEEDED (F.A.N.)
The cooling fan will turn on when the arc starts and
remain on for about a minute after the arc is out to
cool down the power components.
This feature electronically controls the fan so it does
not run continuously when the power switch is turned
on. This will minimize the amount of contaminate and
clogging debris which may be drawn into the
Converter, in addition to the "Central-Air" system
design which intakes lower velocity air through the
higher side louvers and blows out through the lower
back louvers with higher velocity.
OVER-VOLTAGE PROTECTION
Average Input Voltage Protection
The RED-D-ARC MX350 input contactor will open if
the average input supply voltage is above 113VDC,
and will automatically reclose if the voltage drops back
below. During Over-Voltage Shutdown the panel dis-
plays will be as appropriate for the non-welding mode.
(See FRONT PANEL CONTROLS in this section).
When the contactor recloses the output of the
Converter will reactivate. Switching OFF input
power prevents unexpected reactivation.
------------------------------------------------------------------------
Peak Input Voltage Protection
The Chopper PC Board will stop switching and inter-
rupt the machine output whenever the input voltage
across the input capacitors exceeds their 150 volt rat-
ing. The Thermal Shutdown (yellow) panel light will be
lit when this protection is activated (Refer to OVER-
TEMPERATURE SHUTDOWN Section), and resets
when the voltage level drops below the protection
level. The input contactor also opens during this shut
down, until reset.
This feature protects internal components of the
Converter from excessive voltage levels.
CAUTION
B-3
OPERATION
B-3
PARALLELED CONVERTERS
RED-D-ARC MX350 converters that are paralleled (see
INTER-CONNECTION OF CONVERTERS in the
I
NSTALLATION section) must each be set up in the
same manner in order to manage the arc current drawn
f
rom each:
1) Set to CC mode with CC SLOPE switch set to
STICK/GOUGE.
2) Preset Output Controls of both paralleled
Converters to ~1/2 desired total Amps.
If arc current from each Converter gets too out of bal-
ance (primarily a problem if trying to use CV mode) the
hotter running Converter could go into current-limiting
and/or Thermal shutdown (See OVER-TEMPERATURE
SHUTDOWN in the INSTALLATION section), which
might then overload the other, or at least interrupt the
operator’s process. However, no damage will occur to
the Converters.
REMOTE CONTROL OF
PARALLELED CONVERTERS
(FOR CC STICK/GOUGE MODE ONLY)
Full Range remote control can be accomplished with a
separate optional Remote output control (see INSTAL-
LATION section) connected to each Converter. The cur-
rent contribution of each Converter will depend on its
remote output setting.
Partial Range remote control can be accomplished with
a single Remote Control connected to the output
Converter with the input Converter preset with its panel
Output Control to below the minimum desired output
range. The Remote Control, connected to the output
Converter, will control its output to add to the preset
level.
TRANSPORTING AND STORAGE OF
THE RED-D-ARC MX350
CABLE HANDLING
The input and electrode cables are easily disconnected
from the quick-connect "pig-tails", and the Work lead
can be reeled around the RED-D-ARC MX350 case cra-
dled by the base skid handles, to which the clip can be
secured.
TRANSPORTING
The Converter may be carried by one or two persons
using the front and rear top and bottom handles. It can
also be set vertically on a two wheel cart, or horizontally
RED-D-ARC MX350