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B-2
GRAPHIC SYMBOLS THAT
APPEAR ON THIS MACHINE
OR IN THIS MANUAL
OPEN CIRCUIT
U 0
VOLTAGE
U 1
INPUT VOLTAGE
U 2
OUTPUT VOLTAGE
I 1
INPUT CURRENT
I 2
OUTPUT CURRENT
PROTECTIVE
GROUND
WARNING or CAUTION
Explosion
Dangerous Voltage
Shock Hazard
OPERATION
PRODUCT DESCRIPTION
The FLEXTEC™ 450 CE 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 fac-
tory and field operation. It comes in a compact,
rugged case that is designed for portability and out-
door use with an IP23 environmental rating. The user
interface of the FLEXTEC™ 450 CE 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 output control knob. A hot start toggle
selector switch and an arc control knob allow for finer
tuning of the welding arc. The FLEXTEC™ 450 CE
operates on 380V, 400V, or 415V 50hz or 60hz
power.
DUTY CYCLE
The FLEXTEC™ 450 CE 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 CE is also rated for Desert Duty,
elevated temperature operation, in a 55°C(131°F)
ambient. The machine is output de-rated for this
application.
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.
• VRD™ Voltage Reduction Device - Enable this func-
tion for reduced OCV in CC modes for added safety.
FLEXTEC™ 450 CE
B-2
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