Micom P634 - Page 222

IDMT Tripping Characteristics per ANSI
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 8: ANSI, Normally 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
Characteristic 9: ANSI, Short Time Inverse
Characteristic 10: ANSI, Long Time Inverse
Fig. 3-119: Tripping characteristics as per ANSI.
IDMT Tripping Characteristics, RI-Type Inverse and RXIDG-Type Inverse
Characteristic 11: RI-Type 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
Characteristic 12: RXIDG-Type Inverse
Fig. 3-120: RI-type inverse and RXIDG‑type inverse tripping characteristics.
P634
3 Operation
3-166 P634/EN M/R-42-A // P634‑311‑653