Typical Connection: 7Sr22 Connected To Vts And Capacitor Cone Unit - Siemens Argus 7SR21 Technical Manual

7SR21 & 7SR22 - Installation Guide
7.6 Typical Connection: 7SR22 Connected to VTs and
Capacitor Cone Unit
L1 L2 L3
P1
S1
S2
P2
Figure 7.6-1 7SR22 Applied to Feeder with Capacitor Cones Fitted
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1A
1
2
5A
3
4
1A
5
6
5A
7
8
1A
9
10
5A
11
12
1A
13
14
5A
15
16
A
B
C
Capacitor
Cones
Adaptor
Unit
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) Vee Connected VT: Phase Voltage Config:-Va,Vb,Vc
4) DEF elements must be NPS polarised (Vo polarising not applicable)
5) V used for NVD input
4
1A
I I
L1 5
5A
(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
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