*(.&
34
DIAC / DIFC / DSFC Digital Overcurrent Protection
Note: Time measured in seconds
Table 1: Pickup Times for Varying Multiples of Pickup (MPU)
MPU
CURVE*
2
5
10
IAC 51
3.62 - 4.005
1.69 - 1.86
1.19 - 1.32
IAC 53
6.66 - 7.36
1.25 - 1.37
0.687 - 0.759
55-ST
0.298 - 0.330
0.155 - 0.17
0.133 - 0.14
57-MT
20.4 - 22.62
8.82 - 9.75
5.7 - 6.3
66-LT
42.7 - 47.2
17.28 - 19.1
10.78 - 11.9
75-ST
0.748 - 0.827
0.3113 - 0.344
0.244 - 0.2707
IAC 77
6.49 - 7.17
0.859 - 0.954
0.266 - 0.296
95-ST
0.895 - 0.994
0.356 - 0.396
0.276 - 0.303
IEEE Inverse
3.59 - 3.99
1.59 - 1.76
1.12 - 1.25
IEEE Very Inverse
6.51 - 7.24
1.21 - 1.34
0.64 - 0.71
IEEE Ext. Inverse
8.76 - 9.73
1.18 - 1.32
0.374 - 0.412
IEC Inverse
4.73 - 5.26
2.0 - 2.22
1.39 - 1.54
IEC Very Inverse
6.31 - 7.014
1.56 - 1.73
0.69 - 0.768
IEC Ext. Inverse
12.3 - 13.7
1.51 - 1.67
0.369 - 0.41
Definite Time
4.71 - 5.24
4.71 - 5.24
4.71 - 5.21
12T
1.175 - 1.31
0.191 - 0.212
0.051 - 0.056
* TD = 5
