Siemens SIPROTEC 7SD80 - A.3 Connection Examples

Appendix
A.3 Connection Examples
SIPROTEC, 7SD80, Manual
E50417-G1140-C474-A1, Release date 09.2011
345
A.3 Connection Examples
Figure A-7 Current transformer connections to three current transformers and neutral-point current
(ground current) (Holmgreen connection) standard connection, suitable for all power systems
(neutral point in line direction)
Figure A-8 Current transformer connections to three current transformers and neutral-point current
(ground current) (Holmgreen connection) standard connection, suitable for all power systems
(neutral point in busbar direction)