Siemens SINAMICS PERFECT HARMONY GH180 Function Manual page 116

Advanced Motor Protection and RTD Protection Functions
6.18 Device 51 - Fixed Inverse Time Overcurrent
Figure 6-49
114
3
10
2
10
1
10
0
10
1 1.5
stator current to pickup current ratio
IEC Extremely Inverse Pickup Time
IEC
extremely inverse curve
TDM=1.0
2 2.5 3
Advanced Motor Protection for Variable Speed Operation
3.5 4 4.5
Manual, AA, A5E46373908A
5