POWER-MASTER 500 - Victor Technologies

2.07 Standard Features
The power source has the following standard features:
a. Short-Circuit Protection – The output of the power
source can be short circuited in any of the modes of
operation. This protection feature will instantly limit
the output current to a safe value, to assure reliable
operation of the power source.
b. Output Overload Protection – The overload protection
feature will limit the continuous weld current to
the maximum value listed in the specifications for any
of the modes of operation. The machine will continue
to operate but the current will be limited to this maximum
value.
c. Cooling Fan Control – The cooling fans are designed
to operate only when required. They will come on
whenever the output contactor control of the machine
is on. The fans will come on for several minutes when
the machine is first turned on and will normally stay
on for several minutes after the output contactor control
has been switched off. The fans will turn off after
several minutes of inactivity, to minimize the amount
of dirt being drawn into the machine, as well as
lengthen the life of the fans.
d. Overtemperature Protection – If the machine overheats
because of blocked air flow, excessive ambient
temperatures, failed fan, or other cause, the
overtemperature protection will disable the output of
the power source until it has cooled down. If the
overtemperature protection circuit operates, it will
turn on the indicator light on the front panel and the
fans should continue to run until the machine cools.
The overtemperature circuit will reset itself automatically
once the machine has cooled.
e. Multi-Voltage Operation – The power source is designed
to operate from a wide range of input line voltages
as given in the specifications. The machine can
be reconfigured for the different line voltages with a
simple, rugged voltage changeover panel accessible
from the rear panel of the machine (see Installation
chapter for detailed instructions).
f. Multi-Process Operation – The machine has built in
electronic controls which have been optimized for
most welding processes. The following controls are
standard: GTAW with Lift Start, SMAW, CAG,
GMAW/FCAW including the short-arc, globular and
spray transfer modes. Each mode of operation has a
dedicated electronic control which has been optimized
for that particular process.
MANUAL 430429-485 2-5 INTRODUCTION