Lincoln Electric DC-655 Operation, General Description, Recommended Processes and Equipment

B-3 B-3

OPERATION

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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.

CCprocesses 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.

•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.

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DESIGN FEATURES AND

ADVANTAGES

•Separate output terminals for selecting high or low inductance as recommended for the welding process.

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%

IDEALARC DC-655