INSTALLATION
A-4
IDEALARC DC-600
ELECTRICAL INPUT CONNECTIONS
Before installing the machine, check that the input sup-
ply voltage, phase, and frequency are the same as the
machine’s voltage, phase, and frequency as specified
on the machine’s rating plate on the Case Front
Assembly Control Panel. Input power supply entry is
through the hole in the Case Back Assembly. See
Figure A.2 for the location of the machine’s input cable
entry opening, Input Contactor (CR1), and reconnect
panel assembly for dual voltage machines.
FIGURE A.2 - Rear Panel
FUSE AND WIRE SIZES
Protect the input circuit with the super lag fuses or
delay type circuit breakers listed on the Technical
Specifications page of this manual for the machine
being used. They are also called inverse time or ther-
mal/magnetic circuit breakers.
DO NOT use fuses or circuit breakers with a lower amp
rating than recommended. This can result in “nui-
sance” tripping caused by inrush current even when
machine is not being used for welding at high output
currents.
Use input and grounding wire sizes that meet local
electrical codes or see the Technical Specifications
page in this manual.
GROUND CONNECTION
Ground the frame of the machine. A ground
terminal marked with the symbol ( ) is located inside
the Case Back of the machine near the input contactor.
Access to the Input Box Assembly is at the upper rear
of the machine. See your local and national electrical
codes for proper grounding methods.
INPUT POWER SUPPLYCONNECTIONS
A qualified electrician should connect the input power
supply leads.
1.
Follow all national and local electrical codes.
2.
Follow Input Supply Connection Diagram located
on the inside of the machine.
3.
Use a three-phase line.
4.
Remove Input Access Door at upper rear of
machine.
5.
Connect the three-phase AC power supply leads
L1, L2, and L3 to the input contactor
terminals in the Input Box Assembly. See Figure
A.3.
FIGURE A.3 - Input Power Supply
Connections
INPUT SUPPLY
CABLE ENTRY
OPENING
INPUT
CONTACTOR (CR1)
RECONNECT
PANEL ASSEMBLY
INPUT POWER SUPPLY
CABLE WITH BUSHING
OR BOX CONNECTOR
INPUT
CONTACTOR (CR1)
RECONNECT
PANEL ASSEMBLY