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B-22
OVERLOAD PROTECTION
THERMAL PROTECTION
The Power Wave has thermostatic protection from
excessive duty cycles, overloads, loss of cooling, and
high ambient temperatures. When the power source is
subjected to any of these conditions or any of the con-
ditions mentioned above, a thermostat will open. The
yellow high temperature light on the case front comes
on. See Figure B.1 for location. Machine output is
disabled, and welding is not possible until the machine
is allowed to cool and the High Temperature Light
goes out.
OPERATION
OVER CURRENT PROTECTION
The Power Wave 450 is limited to producing 750 amps
peak currrent. If the average current exceeds 540
amps, then the peak current will be limited to 100
amps until the average current decreases to under 50
amps.
POWER WAVE 450
B-22
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Troubleshooting
