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2-1.
Volt-Ampere
Curves
Figure
2-1.
Volt-Ampere
Curves
2-2.
Duty
Cycle
0
1200
10
Duty
Cycle
is
percentage
of
10
minutes
that
unit
can
weld
at
rated
load
without
overheating.
Minutes
Ui
uJ
0.
35%
Duty
Cycle
At
510
Amperes
9
Ui
A.
Low
Range
60
60
The
volt-ampere
curves
show
the
minimum
and
maximum
voltage
and
amperage
output
capabilities
of
the
welding
power
source.
Curves
of
other
settings
fall
be
tween
the
curves
shown.
B.
High
Range
40
0
>
30
C)
a
20
10
0
C)
a
70
60
60
40
30
20
10
0
0 60
100
150
200
250
300
350
400
450
500 550
600
DC
AMPERES
0
100
200
300
400
500
600
700
800
900
DC
AMPERES
ssbl.1
10/91
SB-084
850-A/SB-084
845-A
4A
CAUTION
20
20
30
3-1/2
Minutes
welding
6-1/2
Minutes
Resting
z
DUTY
CYCLE
sbl
.2
8/93
-
Ref.
SB-000
865-D
WELDING
LONGER
THAN
RATED
DUTY
CYCLE
can
damage
unit
and
void
warranty.
Do
not
weld
at
rated
load
longer
than
shown
below.
wam7.1
8/93
Definition
Chart
400
300
0
I00
Figure
2-2.
Duty
Cycle
OM-168
256
Page
2