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100
10000
40
30
s
2000
20
1000
10
400
200
6
100
4
3
40
20
2
10
1
4
1
2
1
0.05
t
Figure 4-5
Trip Characteristics of the Thermal Negative Sequence Protection Stage
7UM62 Manual
C53000-G1176-C149-3
4.5 Unbalanced Load (Negative Sequence) Protection (ANSI 46)
Schieflast
Negative Sequence
t = f (I2/In)
2
3
0.07
0.1
K
--------------------- -
=
2
(
⁄
)
I
I
2
N
4
5
6
7
8
9 10
0.2
0.3
0.4
0.5
I2/In
Parameter:
Setting value
FACTOR K
40 s
30 s
20 s
15 s
10 s
5 s
2 s
0.7
1
415
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