Siemens Argus 7SR21 Technical Manual page 508
Overcurrent relay
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Also See for Argus 7SR21:
- Manual (71 pages) ,
- Installation manual (22 pages) ,
- Manual (39 pages)
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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 1 A tap – use alternative tap for 5 A rated CTs.
2) CT and Earth connections are typical only.
3) Voltage Config:-V
Unrestricted Page 32 of 36
1A
1
2
5A
3
4
1A
5
6
5A
7
8
1A
9
10
5A
11
12
1A
13
14
5A
15
16
V
L
3Vo
V
N
, V
, 3V
ab
bc
0
Figure 7.4-1 7SR22 Applied to Feeder
I
I
L1
5
(I
)
(I
)
A
SEF
I
V
L2
L1
(I
)
(V
)
B
A
V
L2
(V
)
B
I
L3
(I
)
C
V
L3
(V
)
C
V
I
4
4
(V
)
(I
)
X
G
A
B
C
©2018 Siemens Protection Devices Limited
1A
17
18
5A
19
20
21
22
23
24
25
26
27
28
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