Siemens SIPROTEC 7SJ61 Manual page 386

Appendix
A.3 Connection Examples
Figure A-11
Important! Grounding of the cable shield must be effected at the cable's side
For busbar-side grounding of the current transformer, the current polarity of the device is changed via address
0201. This also reverses the polarity of current input IN/INs. When using a cable-type current transformer, the
connection of k and l at Q8 and Q7 must be changed.
Figure A-12
Important! Grounding of the cable shield must be effected at the cable's side
For busbar-side grounding of the current transformer, the current polarity of the device is changed via address
0201. This also reverses the polarity of current input INs. When using a cable-type current transformer, the con-
nection of k and l at Q8 and Q7 must be changed.
386
Current connections to three current transformers, ground current from
additional summation CT, normal circuit layout
Current connections to two current transformers, ground current of additional
toroidal transformer for sensitive ground fault detection.
SIPROTEC, 7SJ61, Manual
C53000-G1140-C210-1, Release date 02.2008