Lincoln Electric IM697 RED-D-ARC MX 300 - Manual (Page 14)

A-7 INSTALLATION A-7
RED-D-ARC MX350
Table .1
Converters Cable Size
on Cable AWG (mm2 )
1 1/0 (50)
2 2/0 (70)
3 3/0 (95)
4 4/0 (120)
5 2x3/0 (2x95)
The output "Electrode" cable should be 2/0 AWG
(70mm
2 ) if sized for rated output up to 200 ft.(61m)
from the Converter. If paralleled, the output cable to
the arc should be 4/0(120mm
2 ).
ELECTRIC SHOCK can kill.
Do not disconnect the Work clip lead
without first switching OFF the
Converter panel switch. Failure to do
so will allow the work lead clip to be
electrically "hot" to work, and "hot" to
the electrode, through the circuit of
the Converter for about 5 seconds until the input
contactor opens.
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CONNECTION FOR NEGATIVE
POLARITY WELDING
(See Figure 2A)
A RED-D-ARC MX350 may be used for Negative
(straight) polarity CV (Innershield) or CC processes if
connected per the diagram shown below:
No more than one RED-D-ARC MX350 may be
connected to a power source for Negative Polarity
welding. Multiple units connected to the same
power source may cause damage to the RED-D-
ARC MX350.
------------------------------------------------------------------------
This connection method will only permit using one
RED-D-ARC MX350 arc on one power source, and
cables have to be run to the RED-D-ARC MX350 from
both (+) and (-) output studs of the power source. This
is required so that the (-) electrode has a return path
to both the RED-D-ARC MX350 and the Power
Source, just like the normal (+)polarity connection has
a (-) return path to both the RED-D-ARC MX350
(through the Work Clamp) and to the Power Source
(through work connections). Both cable sizes are the
same, with capacity as recommended for normal (+)
connection.
If the power source itself can not perform the CV
negative welding process, the RED-D-ARC MX350 is
basically serving very well as a process converter (ei;
CV from a CC power source), as well as a remote
output control. The advantage is that the same
equipment (RED-D-ARC MX350ʼs and CC Power
Sources) are used for all weld process applications.
POWER SOURCE SETUP
Refer to the Instruction Manual provided with the
Multi-Source power source, or other DC power source
being used, for input power supply connections,
output connections and controls setup.
In general:
1. Connect the positive (+) output connection terminal
to the input supplying the RED-D-ARC MX350 sys-
tem, and the negative (-) output connection termi-
nal to the work. (see Figure 1).
2. If not using a Multi-Source power source;
a If an inductance control, or tap, is selectable,
use lowest inductance.
b. Use CC (Constant Current) mode, for maximum
supply voltage.
c. Set panel output control to maximum, for maxi-
mum current capacity.
d. Activate output with the "output terminals on"
switch, or jumper (2-4 on LE Co terminal strips).
WARNING
- +
W Wor ork
Wor
ork
LN-25 Wire LN-25 Wire
Feeder
Feeder
W Wor or k
(-) (-) Work Lead ad
t o
(-) (-) P Pow ower r Sou ourc rce s stu tud
and nd
(-) (-) Electrode Lead Electrode Lead
MX350 MX350
MX350 MX350
(+) ) Out pu put Lea Lead
to o W ork
MX350 MX350
Negative Polarity Negative Polarity
DC DC
POWER POWER
SOURCE SOURCE
CAUTION
Figure 2A