Lincoln Electric SVM136-A service manual General Description, Operation, Return to Section TOC

B-3 B-3

OPERATION

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GENERAL DESCRIPTION

The IDEALARC CV-400 is an SCR controlled three- phase input, DC output power source for welding. It uses a single range potentiometer control. The welder's unique combination of transformer, three phase hybrid rectifier, capacitor bank, output choke, and solid state control system deliver outstanding per- formance.

RECOMMENDED PROCESSES

The IDEALARC CV-400 is a constant voltage power source only. It is recommended for all open arc processes including Innershield and all solid wire and gas procedures within its capacity of 60 to 500 amps.

The CV-400 can be connected to wire feeding equip- ment, including:

•Automatic wire feeders NA-3, NA-5, and NA-5R. (Requires the CV-400 Diode Kit option to use the cold start and cold electrode sensing features of these feeders.)

•Semiautomatic wire feeders LN-7, LN-7 GMA, LN8, LN-9, LN-9 GMA, LN-22, LN23P, LN-25, and LN-742.

OPERATIONAL FEATURES AND CONTROLS

The following operational controls are standard on the IDEALARC CV-400:

•Power Source Pilot Light

•ON/OFF Power Toggle Switch

•Output Control Potentiometer

•Output Control Switch (with Local or Remote posi- tions)

•Auxiliary Power Connections for Wire Feeder and Other Equipment (115V and 42V)

•Thermal Protection Indicator Light

•Voltmeter "+" Electrode or "-" Electrode Switch

DESIGN FEATURES

•Input line voltage compensation keeps output con- stant for fluctuations of ±10%.

•SCR control.

•Hinged front control panel provides easy access to printed circuit boards and other control circuitry.

•Fully enclosed fan motor with permanently lubricated, sealed ball bearings needs no maintenance.

•Fully recessed control panel protects controls and minimizes accidental contact.

•Recessed output terminals reduce chance of acci- dental contact.

•Low profile case permits installation under a work- bench.

•Removable rear access panel provides easy access to input contactor and input lead connections.

•Removable case sides provide easy access for ser- vice or inspection, even when machines are stacked.

•Double-dipped transformer, SCR bridge, and choke resist corrosion.

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IDEALARC CV-400