Daihen OTC Welbee Inverter W400, Owner'S Manual

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S
PECIFICATION
P
RODUCT
S
PECIFICATION AND
C
ONFIGURATION
C
HAPTER
2
2-4
2.1.4 Rated duty cycle
This section explains the rated duty cycle of the welding power source.
• Use this welding power source at or under the rated duty cycle.
Exceeding the rated duty cycle may result in deterioration and damage to the welding
power source.
• Periodically blow moisture-free compressed air to clean dust and dirt accumulated on
the transistor and radiation fin of the diode.
If dust and dirt accumulate on the radiation fin, it may not only reduce the duty cycle
but also result in degradation or burnout of the welding power source.
• The rated duty cycle of the welding power source is the
following
：
<Operation cycle at duty cycle of 60 %>
400 A 40 %
350 A 100 % (for DC)
(Rated duty cycle of 60 % means the power source must be
rested for 4 minutes after 6 minutes of continuous welding
at the rated current.)
• Use the welding power source within its usable range by
observing the duty cycle for the welding current.
• Use the welding power source within the lowest rated duty
cycle of combined accessories such as welding torches.
<Relationship between welding current and duty cycle>
Energized
Stop
6 minutes 4 minutes
10 minutes
40
࠙
DC
ࠚ
࠙
DC pulse
ࠚ
100
50
40
80
0
100 200 283 400
Usable range
Welding current (A)
Duty cycle (%)
100
50
0
100
200 300 350 400
Usable range
Welding current (A)
Duty cycle (%)
300 350