Micom P634 - Page 221

IDMT Tripping Characteristics per IEEE C37.112
Characteristic 5: IEEE C37.112, Moderately Inverse
0.01
0.1
1
10
100
1000
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
I/Iref
t/s
k
=
0.05
k
=
0.1
k
=
1
k
=
10
0.01
0.1
1
10
100
1000
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
I/Iref
t/s
k=0.05
k
=
0.1
k
=
1
k
=
10
0.01
0.1
1
10
100
1000
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
I/Iref
t/s
k=0.05
k
=
0.1
k
=
1
k
=
10
Characteristic 6: IEEE C37.112, Very Inverse
Characteristic 7: IEEE C37.112, Extremely Inverse
Fig. 3-118: Tripping characteristics as per IEEE C37.112.
3 Operation P634
P634/EN M/R-42-A // P634‑311‑653 3-165