Siemens SIPROTEC 7SK80 Manual page 418

Appendix
A.3 Connection Examples
Figure A-18
Important! Grounding of the cable shield must be effected at the cable side
For busbar-side grounding of the current transformers, 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 I at F8 and F7 must be exchanged.
418
Current transformer connections to two phase-current transformers and a ground-current
transformer; the ground current is taken via the highly sensitive and sensitive ground input.
SIPROTEC, 7SK80, Manual
E50417-G1140-C344-A4, Release date 08.2010