Lincoln Electric IDEALARC DC-1000 Service Manual page 14

A-6
OUTPUT CONNECTIONS
Output Studs
The output leads are connected to the output termi-
nals. The output terminals are located on the lower
case front and labeled "+" and "-". There are 1000 amp
rated "+" terminals on the right side, one 500 amp rated
"+" terminal near the center and "-" terminals on the left
side. They are fully recessed to minimize the possibili-
ty of accidental contact by an object or a person. Strain
relief is provided by the oval holes in the base. The
leads are run through these oval holes before they are
connected to the output terminals.
The 1000 amp output connections provide the full
rated output range of the machine. See Table1 for rec-
ommended DC-1000 cable sizes for combined lengths
of electrode and work cables.
The 500 amp output connections provide enhanced
lower current arc characteristics, especially for sub-
merged arc and GMAW procedures below 450 amps.
Auxiliary Power
This machine supplies the 115 volt, AC power needed
for operating wire feeding equipment. The power is
available from terminals #31 and #32 on the terminal
strip. An 8 amp slow blow fuse on the machine control
panel protects the auxiliary power from excessive over-
loads. The circuit has a 1000 volt-ampere rating.
DC-1000 Cable Sizes for Combined Lengths of Copper Electrode and Work Cable
ELECTRODE, WORK AND #21 LEAD
Cable Length
Lengths up to 150 ft. (46m)
150 ft.(46m) to 200 ft (61m)
200 ft.(61m) to 250 ft.(76m)
INSTALLATION
Control Cable Connection
Terminal strips with screw connections are located
behind the hinged door on the front of the power
source to make all the control cable connections for
operating wire feeding equipment. See the appropriate
connection diagram for exact instructions covering the
wire feeder being used.
With the DC-1000 turned off, the control cable from the
automatic wire feeding equipment is connected to the
terminal strip. A strain relief box connector is provided
for access into the terminal strip section. A chassis
grounding screw is also provided below the terminal
strip marked with the symbol
wire feeding equipment grounding wire. See the appro-
priate connection diagram for the exact instructions for
the wire feeder being used. A spare hole is provided for
an additional box connector if required.
Connecting for Air Carbon Arc:
a. Turn off all power.
b. Disconnect all wire feed unit control, electrode and
work leads.
c. Connect a jumper from 2-4 on terminal strip.
d. Place mode switch in the CV(I) position.
With the DC-1000 connected for air carbon arc weld-
ing, the output terminals will be energized at all times.
TABLE A.1
at 100% Duty Cycle
Parallel Cables
3
3
3
IDEALARC ® DC-1000
A-6
for connecting the
Cable Size
1/0 (53mm 2 )
2/0 (67mm 2 )
3/0 (85mm 2 )