Lincoln Electric CV-300 General Description, Recommended Processes And Equipment, Design Features

B-2 OPERATION B-2

CAUTION

When using a CV-300 power source with wire feed- ers, there will be a small spark if the electrode con- tacts the work or ground within several seconds after releasing the trigger.

When used with some wire feeders with the electrical trigger interlock in the ON position, the arc might restart if the electrode touches the work or ground during these several seconds.

------------------------------------------------------------------------

GENERAL DESCRIPTION

The CV-300 is a constant voltage DC power source designed for the GMAW process with limited FCAW capability as well. It features an industrial rating of 300 amps, 32 volts, at 100% duty cycle. It complies with the requirements for a NEMA Class I (100) power source.

It is available from the factory in one model only, with no options other than input voltage or frequency.

RECOMMENDED PROCESSES AND EQUIPMENT

The CV-300 is capable of solid wire welding within the rated output capacity of the machine. It is also capa- ble of welding with the following flux-cored wires: NR- 152, NR-211, NS-3M, NR-203 Ni 1%, and Outershield® 70 and 71.

The CV-300 is recommended for use with the LN-7, LN-742 and LN-25 wire feeder models.

OPERATIONAL FEATURES AND CONTROLS

•Two inductance positions: operator can choose the optimum output characteristics.

•Solid State Output Contactor: no noise, no moving parts to wear.

•Digital Voltmeter/Ammeter is standard.

•Power on/off switch.

•42 VAC, 10 amp auxiliary power available for the wire feeder.

•Circuit breaker protected.

•115 VAC, 5 amp auxiliary power available for the wire feeder; circuit breaker protected.

•Magnum Twist-Mate™ output receptacles.

•Single MS-type (14-pin) connection for wire feeder.

•Solid state controls, with line voltage compensation.

•Optional remote control capability.

DESIGN FEATURES

•"Clean" appearance and simple controls -- easy to operate.

•Electronic and thermostatic protection from over- loads.

•Submersion dipping of assembled transformer, choke, and rectifier in special sealing/insulating material gives extra protection against moisture and corrosive atmospheres.

•Microprocessor based Control PC Board has built-in diagnostic routines.

•Compact size, requires only 19" x 26" footprint.

•Modular construction for easy servicing.

•Recessed panels protect output studs and controls. Large safety margins and protective circuits protect rectifiers from transient voltages and high currents.

LIMITATIONS

The CV-300 is intended only for use with the following FCAW electrodes: NR-152, NR-211, NR-203 Ni 1%, NS-3M, Outershield 70 and 71. The machine has been designed primarily for the GMAW process.

POWER SOURCE OPERATION

Be sure the CV-300 is properly installed, and that all accessories are properly hooked up before attempting operation.

DUTY CYCLE

300Amps, 32 Volts at 100%

400Amps, 36 Volts at 60%

Duty Cycle is based on operation for a 10 minute period.

CV-300