Section 7: Connection Diagrams; Typical Connection: 7Sr22 Directional Oc/Ef And Ref - Siemens Argus 7SR21 Technical Manual
Overcurrent relay
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- Manual (71 pages) ,
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Section 7: Connection Diagrams
7.1
Typical Connection: 7SR22 Directional OC/EF and REF
L1
L2 L3
P1
P2
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P1
P2
S1
S2
S1
S2
S1
S2
S1
S2
1A
1
2
5A
3
4
1A
5
6
5A
7
8
1A
9
10
5A
11
12
1A
13
14
5A
15
16
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 I
4) Phase Voltage Config:-V
Figure 7.1-1 7SR22 Applied to Transformer Incomer
7SR210 & 7SR220 Installation Guide
1A
17
18
I
I
L1
5
5A
(I
)
(I
)
19
A
SEF
20
I
V
21
L2
L1
(I
)
(V
)
22
B
A
V
23
L2
(V
)
24
B
I
L3
(I
)
C
V
25
L3
(V
)
26
C
V
I
4
4
27
(V
)
(I
)
X
G
28
A
B
C
as an REF input with external stabilising and voltage limiting resistor.
5
V
V
an
bn
cn
Page 29 of 36
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