Technical Data
10-17
7SA522 Manual
C53000-G1176-C119-2
Figure 10-2
Trip time characteristics of inverse time overcurrent protection, acc. ANSI/IEEE, (phases and earth)
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
I I
p
⁄
(
)
2.0938
1
–
--------------------------------------
0.17966
+
D
⋅
=
t
0.2663
I I
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
I I
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
I I
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
Summary of Contents for siprotec 7SA522
Page 20: ...7SA522 Manual C53000 G1176 C119 2 ...
Page 64: ...7SA522 Manual C53000 G1176 C119 2 ...
Page 89: ...SIPROTEC 4 Devices 4 25 7SA522 Manual C53000 G1176 C119 2 Figure 4 20 CFC Logic example ...
Page 408: ...7SA522 Manual C53000 G1176 C119 2 ...
Page 456: ...7SA522 Manual C53000 G1176 C119 2 ...
Page 516: ...7SA522 Manual C53000 G1176 C119 2 ...
Page 620: ...Appendix B 48 ...
