Siemens SIRIUS 3RT Series System Manual page 364

SIRIUS 3RF34 solid-state switching devices
3.11 Technical data
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 3-20 Maximum permissible switching frequency z depending on the starting time
motors with a starting current of 4 to 7.2 times the rated current and 60% load
The dashed curves apply to the high currents during operation with a motor starter
1)
protector.
364
t
and the ON period
a
1)
SIRIUS Innovations
System Manual, 01/2011, A8E56203870002-03
t
for
ED