Siemens SIPROTEC 7SA6 Manual page 779

15
14
13
P2
S2
12
S1
P1
Line 1
Figure A-36 Current connections to three transformers with a starpoint connection to the current transformer set
of the corresponding parallel line (for parallel line compensation)
7SA6 Manual
C53000-G1176-C156-2
P2
S2
S1
P1
L1 L2 L3
S2
P2
P1 S1
Important! Cable shield grounding must be done on the cable side!
Note:
Figure A-35 Current connections to two current transformers with separate earth current
transformer (summation current transformer or cable core balance current
tranformer) — not permitted for earthed systems
Panel Surface Mounted
Flush Mounted/Cubicle
I
L1
Q1 Q2 30
I
L2
Q3 Q4 29
I
L3
Q5 Q6 28
I
4
Q7 Q8 27
7SA6
Housing Size
Flush Mounted/Cubicle
I
L1
Q1
I
L2
Q3
I
L3
Q5
I
4
Q8
7SA6
Change of Address 0201 setting changes polarity of 3I
Input, i.e. terminal Q7 must be connected to that CT terminal
pointing in the same direction as the starpoint of the phase current
CTs (towards "Line side" in this diagram)
Housing Size
15
14
13
P2
S2
12
S1
P1
Line 2
1
/
3
Q2
Q4
Q6
Q7
Current
0
2
/
3
Panel Surface Mounted
Flush Mounted/Cubicle
I
L1
Q1 Q2 30
I
L2
Q3 Q4 29
I
L3
Q5 Q6 28
I
4
Q7 Q8 27
7SA6
Appendix
L1
L2
L3
A-55