Operation, General description – Lincoln Electric IDEALARC DC-655 User Manual
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GENERAL DESCRIPTION
The DC-655 is an energy efficient constant voltage DC
power source that produces outstanding arc charac-
teristics for multiple CV or CC welding processes.
Four models are available:
Domestic - all 60 Hertz models except
230/460/575v.
NEMA Class 1 rated
Canadian - 230/460/575v 60 Hertz
NEMA Class 1 rated
European - 50/60 Hertz models “CE” qualified
and rated for IEC 974-1
Export - 50/60 Hertz models NEMA Class 1 rated
RECOMMENDED PROCESSES AND
EQUIPMENT
The DC-655 is designed for CV or CC processes.
CV processes include: GMAW (MIG) and FCAW (flux-
cored) welding, plus the capability of CV submerged
arc welding and air carbon arc gouging. It produces
outstanding welding performance with a single range
full output control knob.
CC processes include stick welding, CC submerged
arc and superior air carbon arc gouging with up to 3/8”
(10 mm) diameter carbons. The same single range full
output control knob is used and paralleling capability
is provided.
The DC-655 is recommended for use with Lincoln’s
DH-10 or LN-10 as well as the LN-7*, LN-7 GMA*, LN-
742, LN-8*, LN-9*, LN-9 GMA*, LN-23P and LN-25
semiautomatic wire feeders. It is also recommended
for use with the NA-3, NA-5 and NA-5R automatic
feeders. “Cold starting” for sub-arc or across arc
“touch-sensing” can be used.
* The 14-pin MS receptacle on the European models
does not provide 115 VAC for these feeders; 115
VAC must be obtained from terminal strip.
Two DC-655’s may be paralleled in a “master” and
“slave” interconnection using the K1611-1 Paralleling
kit.
DESIGN FEATURES AND
ADVANTAGES
• Separate output terminals for selecting high or low
inductance as recommended for the welding
process.
•
Power on/off switch with pilot light and thermostat
tripped indicator light.
• Full range output voltage (CV mode) and current (CC
mode) control for easy operation.
• Panel switches behind a latched front panel for
remote or local output control, output on or remote
selection, and CC, CV Sub-arc or CV MIG mode
selection.
• Panel knob settable CC arc force control with built-
in adjustable “Hot Start”.
• High efficiency output, and selectable “sleep mode”
idle mode timer which shuts down input power if not
used for extra energy conservation.
• Fan as needed (F.A.N.). Solid state thermally con-
trolled fan operates cooling fan only when required.
Minimizes power consumption, operating noise and
dust intake.
• Hinged cover to protect output terminals and auxil-
iary connections.
• Electronic and thermostatic protection for current
overload and excessive temperatures.
• 42 VAC, 10 amp auxiliary power available for the wire
feeder; circuit breaker protected.
• 115 VAC, auxiliary power available for the wire feed-
er; circuit breaker protected. 20 amp breaker on
Domestic model and 15 amp breaker on Canadian,
European, and Export Models.
• 115 VAC duplex plug receptacle available on
Domestic and Canadian Models. 20 amp breaker on
Domestic Models and 15 amp breaker on Canadian
Model.
• 220 VAC receptacle on European and Export models
for connecting to a water cooler. Protected by 2 amp
breaker.
• Single MS-type (14-pin) connection for wire feeder.
• Optional Field Installed Digital or Analog Voltmeter/
Ammeter kits are available.
• Optional dual feeder kit for like polarity connection of
two wire feeders. Easy panel installation.
• Optional Dual Process Switch for two processes
with polarity change and electrical isolation.
WELDING CAPABILITY
The DC-655 has the following Output and Duty Cycle
based on operation for a 10 minute period:
650 Amps, 44 Volts at 100%
815 Amps, 44 Volts at 60%
OPERATION
B-3
B-3
IDEALARC DC-655