Siemens SIPROTEC 4 7VK61 Manual page 275

[anschl-beisp-spgw-anschl-mit-e-n-wickl-121102-kn, 1, en_GB]
Figure C-6
SIPROTEC 4, 7VK61, Manual
C53000-G1176-C159-5, Edition 05.2018
Voltage connections to three star-connected voltage transformers with additional open-delta
windings (da–dn–winding, for voltage protection, voltage sum monitoring – not available for
synchronism check applications
Connection Examples
C.2 Voltage Transformer Connection Examples
275