Siemens siprotec 7SA6 - Page 713

Appendix
A-377SA6 Manual
C53000-G1176-C133-1
Figure A-23 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
)
LineTransformer
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
k
l
k
l