Operation – Lincoln Electric IDEALARC CV-300 User Manual
Page 21
B-4
OPERATION
B-4
5. 115-VOLT CIRCUIT BREAKER
- Protects
the 115-volt 31-32 circuit in the wire feeder recep-
tacle from overloads and shorts. If this circuit
breaker opens, the CV-300 will operate normally.
However, any equipment powered by the 115-volt
circuit will not operate.
NOTE: Earlier models may have one 10amp circuit
breaker for both the 115 and 42 volt AC circuits.
6. 42-VOLT CIRCUIT BREAKER
- Protects
the 42-volt 41-42 circuit in the wire feeder recepta-
cle from overloads and shorts. If this circuit break-
er opens, the CV-300 will operate normally.
However, any equipment powered by the 42-volt
circuit will not operate.
7. VOLTS/AMPS SWITCH
- When in the “V”
position, output voltage is displayed on the digital
meter. When in the “A” position, the output current
is displayed on the digital meter.
8. DIGITAL VOLTMETER/AMMETER
- The
meter displays the CV-300 output current or the
arc voltage.
NOTE: Due to voltage drops in the welding cables and
at the cable connection points, the actual arc voltage
may be lower than that displayed on the voltmeter.
Use welding cables of the proper capacity and make
sure all connections are tight to minimize this effect.
9. THERMAL PROTECTION INDICATION
LIGHT
- When lit, the light indicates that the pro-
tection thermostat has activated. The digital meter
will display "E10" when this occurs. The machine
will not operate. When the light turns off, the
machine has cooled sufficiently to provide welding
output power again.
NOTE: Leaving the ON/OFF POWER SWITCH in the
"ON" position will result in the most rapid cooling.
10. WIRE FEEDER RECEPTACLE
- This is a
14-pin MS style receptacle. It provides connec-
tions for auxiliary power, contactor closure, remote
output control, wire feeder voltmeter sense lead,
and ground.
11. HIGH INDUCTANCE NEGATIVE OUT-
PUT TERMINAL
- The high inductance con-
nection is typically used for short arc welding heav-
ier welds or when using 75% Argon/25% CO
shielding gas. This connection produces a softer
arc and a flatter bead with more wash-in than the
low inductance connection. A spray type transfer
is possible with either connection.
12. LOW INDUCTANCE NEGATIVE OUT-
PUT TERMINAL
- The low inductance connec-
tion is typically used for short arc welding of mild
steel, particularly on thin materials or when using
CO shielding gas.
13. POSITIVE OUTPUT TERMINAL
NOTE: The positive and negative output terminals are
Magnum Twist-Mate receptacles. Insert a matching
Twist-Mate plug and twist clockwise to engage.
For GMAW processes, and some FCAW processes,
the positive output connection goes to the wire feeder.
One of the negative output connections goes directly to
the work.
IDEALARC CV-300