13
Technical data and dimension sheets
Braking resistor
Operating Instructions – Compact Extra-Low Voltage Drives
98
The specified continuous power can be increased in short-time duty as a function of
the relative cyclic duration factor (cdf) by multiplying by the corresponding overload
factors. For cyclic operation, you can determine the overload factor with the known cdf
value from the following graphic and table.
Overload factor depending on cyclic duration factor
(cycle duration120s)
cdf-values
O
ve
rlo
ad
fa
ct
or
fo
r f
la
t-d
es
ig
n
re
si
st
or
s
1% 6% 10% 25% 40% 60% 100%
20
10
3
1
28564498827
Cyclic duration
factor
1%
2%
6%
15%
25%
40%
60%
80%
100%
Overload
factor
22
13
8.2
4.2
3.0
2.2
1.5
1.12
1.0
A
B
H
l
J
F
G
C
D
E
3
G
E
D
3
F
C
28564504075
26718014/EN – 11/2020
