Siemens siprotec 7SJ63 - Page 463

Technical Data
10-177SJ63 Manual
C53000-G1140-C120-1
Figure 10-2 Trip Time Characteristics Of The Inverse-time Overcurrent Protection, As Per ANSI/IEEE (Phases, Ground)
LONG INVERSE
MODERATELY INVERSE
D [s]
I / I
p
I / I
p
1
2
5
10
15
0.5
D [s]
1
2
5
10
15
0.5
1
0.3
0.1
1 2 3 5 10 20
100
20
10
0.5
0.2
0.05
t
8.9341
II
p
⁄()
2.0938
1
–
-------------------------------------------
0.17966+




D⋅
=
t
0.2663
II
p
⁄()
1.2969
1
–
-------------------------------------------
0.03393+




D⋅
=
1
0.3
0.1
1 2 3 5 10 20
100
20
10
5
2
0.5
0.2
0.05
INVERSE SHORT INVERSE
D [s]
t [s]
t [s]
I / I
p
I / I
p
1
2
5
10
15
0.5
D [s]
1
2
5
10
15
0.5
1
0.3
0.1
1 2 3 5 10 20
100
20
10
5
2
0.5
0.2
0.05
t
0.0103
II
p
⁄()
0.02
1
–
-------------------------------------
0.0228+




D⋅
=
[s]
[s]
[s]
1 2 3 5 10 20
0.3
0.1
100
20
10
2
0.05
5
3
5
[s]
t
5.6143
II
p
⁄()1
–
-------------------------
2.18592+



D⋅
=
0.2
0.5
1
t [s]t [s]
2
3
50
50
0.07
0.7
3
7
30
30
7
3
0.7
0.07
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