ESAB 653 cvcc Instruction Manual page 30

SECTION 4
4.1.3 Output Voltage/Current Control
This control allows the operator to adjust the output voltage in the CV mode and output current in the CC mode. Placing
the Panel/Remote switch in the "Remote" position disables the output control on the front panel. Calibration marks are to
provide a rough guide in setting voltage and current.
4.1.4 Over Temperature Indicator (Temp.)
This amber light will indicate when an internal overheating condition has occurred and one of the thermal switches has
opened. User control of the solid state contactor will be interrupted and power source output will shut down to protect
critical components. Once cooled to a safe temperature, the thermal switch will automatically reset and output control will
be restored.
4.1.5 Voltmeter and Ammeter
A digital voltmeter and ammeter provides an accurate indication of dc output voltage and current.
4.1.6 Over Current Protection
The 653cvcc incorporates automatic over current protection. If an over current condition occurs, the automatic circuitry will
"fold back" the output current to a level that will prevent damage to the power source. The power source will remain in this
low current "fold back" mode until the arc is broken, the torch trigger is released or the contactor switch is reset.
4.1.7 High & Low Inductance Receptacles
The 653cvcc provides high and low inductance output connections (see figure 3-5). Both are positive output terminals. The
high inductance terminal slows the power source dynamic response. This means the output current will build at a slower
rate compared to the low inductance terminals. The welding process and application will determine which terminal should
be used. The chart below provides suggested terminal connections.
4.1.8 Contactor, On/Remote Switch
The Contactor Control switch is located on the front panel of the power source. In the "on" position, the solid state contactor
is energized and output power is available at the output terminals. The "Remote" position allows the solid state contactor
to be controlled from a remote Mig wire feeder or mechanized sub arc control.
4.1.9 Process Switch (CC-CV)
The process switch allows for selection of the output characteristics of the power source depending on the welding process
being used. The CV position produces a "Flat" volt-amp characteristic and is mostly used for the Mig (GMAW) and Submerged
Arc (SAW) welding processes and occasionally with Air Carbon Arc Cutting (CAC-A). The CC position produces a "Drooping"
characteristic most popular for Stick (SMAW), CAC-A and sometimes SAW.
Process Switch
Inductance
Mig Solid Wire (GMAW)
Flux Cored (FCAW)
Sub Arc (SAW)
Arc Gouging (CAC-A)
1. Small diameter wires (<1/16-inch) with argon mixtures.
2. <3/32-inch diameter wires.
3. Fast dynamic response (optional setting only).
CC CV
High Low High Low
X X 1 X
X X
X X 2 X
X X 3 X
30
OPERATION