Advanced Motor Protection and RTD Protection Functions
6.18 Device 51 - Fixed Inverse Time Overcurrent
Figure 6-21
90
2
10
1
10
0
10
1
1.5
stator current to pickup current ratio
IEEE Very Inverse Pickup Time
IEEE
very 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