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3. GENERAL NOTICE OF OPERATION
3.1 Rated Duty Cycle
CAUTION
Use this welding power source at or under the rated duty cycle. Exceeding the rated duty
cycle limitation may result in damage to the welding machine.
Built-up dust on the transistor or the cold plate on the rectifier may affect the equipments.
Take off the cover of the welding power source once a half year, and then remove dust by
blowing moisture-free compressed air on each part.
The rated duty cycle of the welding power source is the following:
CPVE-400: 60% at 400A.
CPVE-500: 100% at 500A
The duty cycle of 60% means the
machine must be rested for 4 minutes
after 6 minutes of continuous welding at
the rated current.
Failure to observe duty cycle limitations
may cause the temperature inside the
welding machine to exceed tolerance
levels. This may contribute to premature
welding machine failure or product
damage.
The relationship between welding current
and duty cycle is shown in the figure right.
Use the welding machine within its usable
range, based on appropriate the duty
cycle for the welding current.
The duty cycle of the welding power
source is also limited by the duty cycles of
combined accessories such as welding
torches. Use the welding machine within
the lowest rated duty cycle of the
accessories.
4 min.
6 min.
OFF
ON
10 min.
Cycle of operations with 60% duty cycle
100% (310 A or less)
100
50
0
Dut
y cy
cle (%
)
100
200
300
400
Welding current (A)
60%
CPVE-400
usable range
100%
Duty Cy
cle
(%
)
0
100
50
500
400
300
100
200
Welding Current (A)
CPVE-500
usable range
Wminfo
