SIRIUS 3RF34 solid-state switching devices 
  3.11 Technical data 
SIRIUS Innovations 
System Manual, 01/2011, A8E56203870002-03 
371 
,D,H ,E,H 
     
W('>V@
]>K@
 
1  t
a
 = 0.05 s 
2  t
a
 = 0.1 s 
3  t
a
 = 0.2 s 
4  t
a
 = 0.4 s 
5  t
a
 = 0.8 s 
6  t
a
 = 1.6 s 
7  t
a
 = 3.2 s 
Figure 3-27  Maximum permissible switching frequency z depending on the starting time t
a
 and the ON period t
ED
 for 
motors with a starting current of up to 4 times the rated current and 60% load