OPERATION
WELDING THERMAL OVERLOAD
PROTECTION
The
POWER
MIG®
255XT
has
built-in
protective
thermostats
that
respond
to
excessive temperature. They open the wire feed
and welder output circuits if the machine
exceeds
the
maximum
safe
operating
temperature because of a frequent overload, or
high ambient temperature plus overload. The
thermostats automatically reset when the
temperature reaches a safe operating level and
welding and feeding are allowed again, when
gun is retriggered.
OVERCURRENT PROTECTION
The machine will automatically reduce the
output if the load on the machine exceeds 300 to
320 amperes. This protects the welding power
SCR’s from excessive short circuit currents and
from exceeding their temperature rating before
the thermostats can react.
WELDING PROCEDURE INFORMATION
NOTE:
See inside cover of machine for additional,
commonly used welding procedure.