Typical Connection: 7Sr22 Directional Oc/Ef And Nvd - Siemens Argus 7SR21 Technical Manual

7.3

Typical Connection: 7SR22 Directional OC/EF and NVD

L1 L2 L3
P1
S1
S2
P2
NOTES
1) CT circuits are shown connected to 1 A tap – use alternative tap for 5 A rated CTs.
2) CT and Earth connections are typical only.
3) Application shows use of V
4) Star Connected VT: Phase Voltage Config:-V
Figure 7.3-1 7SR22 Applied to Feeder Including NVD Protection
Unrestricted ©2018 Siemens Protection Devices Limited
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
A
16
B
C
V
L
V
N
as an NVD input.
4
7SR210 & 7SR220 Installation Guide
1A
17
I 18
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
,V ,V
an bn cn
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