Typical Connection: 7Sr22 Directional Oc/Ef And Nvd; Figure 7.4-1 7Sr22 Applied To Feeder - Siemens 7SR210 Installation Manual
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7SR21 & 7SR22 - Installation Guide
7.4
Typical Connection: 7SR22 Directional OC/EF and NVD
L1
L2
L3
P1
S1
S2
P2
NOTES
1) CT circuits are shown connected to 1A tap – use alternative tap for 5A rated CTs.
2) CT and Earth connections are typical only.
3) Voltage Config:-V
Page 22 of 24
1A
1
2
I
L1
5A
(I
)
3
A
4
1A
5
6
I
L2
5A
(I
)
7
B
8
1A
9
10
I
L3
5A
(I
)
11
C
12
1A
13
14
I
4
5A
(I
)
15
G
16
V
L
3Vo
V
N
, V
, 3V
ab
bc
0
Figure 7.4-1 7SR22 Applied to Feeder
1A
17
18
I
5
5A
(I
)
19
SEF
20
21
V
L1
(V
)
22
A
V
23
L2
(V
)
24
B
V
25
L3
(V
)
26
C
V
4
27
(V
)
X
28
A
B
C
©2011 Siemens Protection Devices Limited
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