Siemens siprotec 7SA6 - Page 781

Appendix
A-577SA6 Manual
C53000-G1176-C156-2
Figure A-38 Current connections to three current transformers and earth current from the star-point connection of an
earthed power transformer (for directional-controlled earth fault protection)
Housing Size
1
/
3
Line
L1
L2
L3
Transformer
Panel Surface Mounted
Flush Mounted/Cubicle
I
4
I
L1
I
L2
I
L3
Q1
Q3
Q5
Q2
Q4
Q6
Q7Q8
15
14
13
27
30
29
28
12
7SA6
Housing Size
1
/
2
(Figures in Brackets Relating to Size
1
/
1
)
Line
L1
L2
L3
Transformer
Panel Surface Mounted
Flush Mounted/Cubicle
I
4
I
L1
I
L2
I
L3
Q1
Q3
Q5
Q2
Q4
Q6
Q7Q8
(50) 25
(49) 24
(48) 23
(97) 47
50 (100)
49 (99)
48 (98)
22 (47)
7SA6
S2
S1
P2
P1
S1 P1
P1 P2
S1 S2
P1 P2
S2
S1
P2
P1