6
05.01
6.3 Technical data
6-163
© Siemens AG 2008 All Rights Reserved
SIMODRIVE 611 Configuration Manual (PJU) – 05/2008 Edition
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
max
specified in Table 6-7.
S The maximum infeed power P
max
of the infeed module may not be ex-
ceeded.
S The power derating as a function of the installation altitude must be taken
into account.
Table 6-7 Evaluation factor for the load duty cycle
Total duration
T 10 s 10 s T 60 s 60 s T 600 s
B
max
1.03 0.90 0.89
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
n
=36 kW; P
max
=70 kW)
i 1 2 3 4 5
P [kW] 50 20 36 0 40
t [s] 1.5 1 2 1.2 1.2
P
t
1
t
t
2
t
3
t
5
T
P
1
P
5
P
3
P
2
t
4
P
4
=0
Fig. 6-9 Example, calculating a load duty cycle
6 Infeed Modules11.0502.0302.03
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