Electrical Input Connections; Ground Connection; Input Power Supplyconnections - Lincoln Electric IDEALARC DC-600 Operator's Manual

A-3

ELECTRICAL INPUT CONNECTIONS

Before installing the machine, check that the input
supply voltage, phase, and frequency are the same as
the machine's voltage, phase, and frequency as spec-
ified 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.
INPUT SUPPLY
CABLE ENTRY
OPENING
CONTACTOR (CR1)
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
"nuisance" 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.
terminal marked with the symbol (
the Case Back of the machine near the input contac-
tor. Access to the Input Box Assembly is at the upper
rear of the machine. See your local and national elec-
trical codes for proper grounding methods.
INSTALLATION
INPUT
RECONNECT
PANEL ASSEMBLY
A ground
) is located inside
IDEALARC DC-600

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 by passing
them thru the three aligned .50" diameter holes in
the baffle and tighten them in the terminal connec-
tors. Be sure to close the baffle by inserting the
tab into the slot in the baffle. See Figure A.3.
CONTACTOR (CR1)
INPUT POWER SUPPLY
CABLE WITH BUSHING
OR BOX CONNECTOR
FIGURE A.3 - Input Power Supply
Connections
A-3
INPUT
RECONNECT
PANEL ASSEMBLY