Siemens 7SC80 Manual page 132

Functions
2.3 Directional Overcurrent Protection 67, 67N
MofPU = 1 bis 1.94
1.13 1.63
1.19 1.69
1.25 1.75
1.31 1.81
1.38 1.88
1.44 1.94
The value pairs are entered at address 1531 MofPU Res T/Tp to recreate the reset curve. The following
must be observed:
•
The current values entered should be those from
values Ι/Ιp are rounded. This, however, will not be indicated.
Current flows greater than the highest current value entered will not lead to a prolongation of the reset
time. The reset curve (see
current point.
Current flows which are less than the smallest current value entered will not lead to a reduction of the
reset time. The reset curve (see
smallest current point.
Table 2-10
MofPU = 1 bis 0.86
1.00 0.93
0.99 0.92
0.98 0.91
0.97 0.90
0.96 0.89
0.95 0.88
0.94 0.86
[anwenderkennl-260602-kn, 1, en_US]
Figure 2-35
You can prolong the tripping time by a parameterizable, constant time. The overcurrent element 67-TOC is set
using parameter 2225 67-TOC T adder and the overcurrent element 67N-TOC using parameter 2325 67N-
TOC T adder.
132
MofPU = 2 bis 4.75
2.50 4.00
2.75 4.25
3.00 4.50
3.25 4.75
Figure 2-19, left side) is parallel to the current axis, beginning with the largest
Figure
Preferential values of standardized currents for user-defined dropout curves
MofPU = 0.84 bis 0.67
0.84 0.75
0.83 0.73
0.81 0.72
0.80 0.70
0.78 0.69
0.77 0.67
Using a user-defined curve
MofPU = 5 bis 7.75
5.50 7.00
5.75 7.25
6.00 7.50
6.25 7.75
Table 2-9, along with the matching times. Deviating
2-19, left side) is parallel to the current axis, beginning with the
MofPU = 0.66 bis 0.38
0.66 0.53
0.64 0.50
0.63 0.47
0.61 0.44
0.59 0.41
0.56 0.38
MofPU = 8 bis 20
10.00 17.00
11.00 18.00
12.00 19.00
13.00 20.00
14.00
MofPU = 0.34 bis 0.00
0.34 0.16
0.31 0.13
0.28 0.09
0.25 0.06
022 0.03
0.19 0.00
SIPROTEC Compact, 7SC80, Manual
E50417-G1140-C486-A8, Edition 07.2017