Lincoln Electric FLEXTEC 450 - Manual (Page 15)

b-2 OPERATION b-2
FLEXTEC™ 450
PRODUCT DESCRIPTION
The Flextec™ 450 is a multi-process CC/CV DC
inverter and is rated for 450 amps, 38 volts at a 60%
duty cycle. The Flextec is intended for both factory
and field operation. It comes in a compact, rugged
case that is designed for portability and outdoor use
with an IP23 environmental rating. The user interface
of the Flextec™ 450 is simple and intuitive. Weld
modes are selected by a 4 position selector switch.
Volts and Amps are displayed on an easy to view LED
display, and the amps and volts are set by a large out-
put control knob. A hot start toggle selector switch
and an arc control knob allow for finer tuning of the
welding arc. The Flextec™ 450 operates on 380V,
460V, or 575V 50hz or 60hz power.
DUTY CYCLE
The Flextec™ 450 is capable of welding at a 100%
duty cycle (continuous welding) at 400 amps rated
output. The 60% rating is 450 amps base off of a 10
minute cycle - 6 minutes on time and 4 minutes off
time. The maximum output of the machine is 500
amps.
The Flextec™ 450 is also rated for Desert Duty, ele-
vated temperature operation, in a 55°C(131°F) ambi-
ent. The machine is output de-rated for this applica-
tion.
DESIGN FEATURES
• Severe Duty Design for outdoor use (IP23 rating).
• Passive Power Factor Correction – reliably gives
95% power factor for lower installation costs.
• 89% Efficiency rating – reduces electrical utility
costs.
• Simple user interface - designed with the operator in
mind. Getting setup for the weld is several clicks
away and even the most novice welder can be confi-
dent he is setup properly.
• F.A.N. (fan as needed). Cooling fan runs when the
output is energized and for a 5 minute cool down
period after output is disabled.
• Thermal protection by thermostats with Thermal
Indicator LED.
• Error Codes display on LED screen for ease of trou-
ble shooting.
• Electronic over current protection.
• Input voltage misconnection protection.
• Utilizes digital signal processing and microprocessor
control.
OPEN CIRCUIT
VOLTAGE
INPUT VOLTAGE
OUTPUT VOLTAGE
INPUT CURRENT
OUTPUT CURRENT
PROTECTIVE
GROUND
WARNING or CAUTION
Explosion
Dangerous Voltage
Shock Hazard
GRAPHIC SYMbOLS THAT
APPEAR ON THIS MACHINE
OR IN THIS MANUAL
U0
U1
U2
I1
I2