Siemens siprotec 7SJ63, Instruction Manual

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Technical Data
10-14
7SJ63 Manual
C53000-G1140-C120-1
Figure 10-1 Trip Characteristics of the Inverse-time Overcurrent Protection, as per IEC 60755–3 (phases and ground)
0.1
0.2
0.4
1.6
3.2
0.05
Extremely Inverse:
(Type C)
I / I
p
1
0.3
0.1
1 2 3 5 10 20
100
20
10
5
2
0.5
0.2
0.05
Normal Inverse: Very inverse:
(Type B)
T
p
t [s]
t [s]
I
/
I
p
I
/
I
p
1
0.3
0.1
1 2 3 5 10 20
100
20
10
5
2
0.5
0.2
0.05
[s]
[s]
1 2 3
5
10 20
0.3
0.1
100
20
10
2
0.05
5
[s]
0.2
0.5
1
t [s]
3
3
30
30
3
t
0.14
I I
p
⁄ ( )
0.02
1 –
-------------------------------------- T
p
⋅
=
(Type A)
t
13.5
I I
p
⁄ ( )
1
1 –
----------------------------
T
p
⋅
=
t
80
I I
p
⁄ ( )
2
1 –
---------------------------- T
p
⋅
=
0.8
0.1
0.2
0.4
1.6
3.2
0.05
0.8
7
T
p
0.1 0.2
0.4
1.6
3.2
0.8
T
p
0.05
t trip time in seconds
T
p
setting value of the time factor
I
fault current
I
p
setting value of the pickup cur-
Note: For ground faults read
I
Ep
stead of
I
p
and T
Ep
instead of T
p
0.1
0.2
0.4
3.2
0.05
10
3
1
1 2 3 5 10 20
1000
200
100
50
20
5
2
0.5
Long Inverse:
T
p
t [s]
I / I
p
[s]
30
300
0.8
7
t
120
I I
p
⁄ ( )
1
1 –
---------------------------- T
p
⋅
=
1.6
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