Lincoln CV-525, Operator'S Manual, Page: 21 / 36

Displays include analog current & voltage meters, pilot
light, thermal light and feeder ready light. The three
feeder receptacles are for Lincoln
’ s existing wire feed-
ers, ARCWELD AWF wire feeder/Panasonic style
and OTC style wire feeders. The control components
are described below:( See Figure B.1)
1. POWER ON/OFF SWITCH
The power ON/OFF switch controls the input con-
tactor through a 115V power supply of the auxiliary
transformer.
2. Pilot Light
The white neon pilot light indicates if the power
source input contactor is closed.
3. 42VAC CIRCUIT BREAKER
The 42VAC auxiliary power is protected with a 10
Amp circuit breaker in series.
4. 115VAC CIRCUIT BREAKER
The 115VAC auxiliary power is protected with a 10
Amp circuit breaker in series.
5. CRATER VOLTAGE CONTROL
Crater voltage can be set with this potentiometer on
the power source. This function can also be used
as dual procedure during welding.
6. CRATER CURRENT CONTROL
Crater current can be set with this potentiometer on
the power source. This function can also be used
as dual procedure during welding.
7. VOLTMETER SWITCH
The voltage switch connects either the "+" stud or
the "-" stud to the remote work sensing lead (#21)
of the automatic or semiautomatic equipment.
8. 2-STEP / 4-STEP TRIGGER SWITCH
The output is on only when trigger is pressed in 2-
step Mode operation. 4-Step trigger mode elimi-
nates the need to hold the gun trigger closed while
welding. The second trigger-pull in 4-step mode
also activates the crater current and crater voltage
settings.
9. GAS PURGE SWITCH
Gas Purge energizes the gas solenoid valve in the
Arcweld AWF, Panasonic style or OTC style wire
feeder.
10. THERMAL PROTECTION LIGHT
The amber thermal protection light indicates if
either of the two protective thermostats has
opened. Output power will be removed when the
light is ON.
POWER SOURCE OPERATION
When using a CV-525 power source with wire feeders,
there will be a small spark if the electrode contacts 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 can restart
if the electrode touches the work or ground during
these several seconds.
The power source is also protected against overloads
on the SCR bridge assembly through an electronic
protection circuit. This circuit senses an overload on
the power source and limits the output to 550 amps by
phasing back the SCR
’
s.
Duty Cycle and Time Period
The CV-525 is rated at the following duty cycles:
Duty Cycle* Amps Volts
100% 400 34
60% 450 36.5
50% 500 39
45% 525 40.25
* Based upon a 10 minute time period. (i.e., for 60%
duty cycle, it is 6 minutes on and 4 minutes off).
Overloading the power source may result in opening
of an internal protective thermostat as indicated by the
amber thermal protection light turning on.
STARTING THE MACHINE
The POWER toggle switch at the extreme right side of
the control panel in the
“
I
“
position energizes and
closes the three phase input contactor from a 115 volt
auxiliary transformer. This in turn energizes the main
power transformer.
The machine is de-energized when the POWER
switch is in the
“
0
”
position.
The white light next to the POWER switch indicates
when the input contactor is energized.
CONTROL
CONTROL
SETTINGS & DESCRIPTIONS
SETTINGS & DESCRIPTIONS
The CV525 basic front panel contains following con-
trol features: power on/off switch, local/remote select
switch, 2 step/4 step select switch, gas purge switch,
42V/115V select switch, voltmeter switch, 42V and
115V circuit breakers, local output potentiometer, and
crater current and crater voltage potentiometers.
B-8
OPERATION
B-8
CV-525