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6 Infeed Modules
6.4 Technical data
6-170
P
P
1
P
k
P
3
P
2
t
t
1
Fig. 6-11
Explanation of the rule of thumb for block–type load duty cycles
The following applies for the rules of thumb:
S
The evaluation factor B, calculated for the load duty cycle, must be less than
the maximum values B
S
The maximum infeed power P
ceeded.
S
The power derating as a function of the installation altitude must be taken
into account.
Table 6-11
Evaluation factor for the load duty cycle
B
max
Calculation example for a block–type load duty cycle:
Evaluation/assessment factor B should be determined for the following load
duty cycle:
Infeed module used: I/R 36 kW (P
i
1
P [kW]
50
t [s]
1.5
P
P
1
P
5
P
3
P
2
P
=0
4
t
1
Fig. 6-12
Example, calculating a load duty cycle
SIMODRIVE 611 Configuration Manual (PJU) – 02/2012 Edition
t
2
3
T
specified in Table 6-11.
max
of the infeed module may not be ex-
max
Total duration
T v 10 s
10 s t T v 60 s
1.03
0.90
=36 kW; P
=70 kW)
n
max
2
3
20
36
1
2
t
t
2
3
T
© Siemens AG 2012 All Rights Reserved
02.03
02.03
05.01
t
t
k
60 s t T v 600 s
0.89
4
5
0
40
1.2
1.2
t
t
t
4
5
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