Siemens SIPROTEC 7SK80 - Connection Examples

Appendix
A.3 Connection Examples
SIPROTEC, 7SK80, Manual
E50417-G1140-C344-A4, Release date 08.2010
411
A.3 Connection Examples
Figure A-7 Current transformer connections to three current transformers and neutral rpoint current
(ground current) (Holmgreen connection) – appropriate for all networks
Figure A-8 Current transformer connections to two current transformers –
only for isolated or resonant-grounded networks