Siemens SIRIUS 3RT Series System Manual page 371

1 t = 0.05 s
a
2 t = 0.1 s
a
3 t = 0.2 s
a
4 t = 0.4 s
a
5 t = 0.8 s
a
6 t = 1.6 s
a
7 t = 3.2 s
a
Figure 3-27 Maximum permissible switching frequency z depending on the starting time t
motors with a starting current of up to 4 times the rated current and 60% load
SIRIUS Innovations
System Manual, 01/2011, A8E56203870002-03
SIRIUS 3RF34 solid-state switching devices
and the ON period t
a
3.11 Technical data
for
ED
371