Siemens siprotec 7SA6 User Manual page 713

Transformer
Transformer
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)
7SA6 Manual
C53000-G1176-C133-1
Housing size
1
Housing size / (figures in brackets relating to size
2
15
14
13
27
k
l
Line
1
/
3
(50) 25
(49) 24
(48) 23
(97) 47
k
l
LineTransformer
Appendix
Panel surface mounted
Flush mounted/cubicle
I
L1
Q1 Q2 30
I
L2
Q3 Q4 29
I
L3
Q5 Q6 28
I
4
Q8 Q7 12
7SA6
Panel surface mounted
Flush mounted/cubicle
I
L1
Q1 Q2 50 (100)
I
L2
Q3 Q4 49 (99)
I
L3
Q5 Q6 48 (98)
I
4
Q8 Q7 22 (47)
7SA6
1
/ )
1
L1
L2
L3
L1
L2
L3
A-37