Siemens SIPROTEC 4 Manual page 449

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Figure C-13
[anschl-u1e-u2e-u3e-abgang-20070129, 1, en_US]
Figure C-14
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Figure C-15
SIPROTEC 4, 7SJ80, Manual
E50417-G1140-C343-A8, Edition 12.2017
High-impedance differential protection for a grounded transformer winding (the illustration
shows the partial connection for high-impedance differential protection)
Example for the connection type "VAN, VBN, VCN" with voltage connection on the feeder side
Voltage transformer connections to two voltage transformers (phase-to-phase voltages) and
broken delta winding (da-dn) – appropriate for all networks
C.1 Connection Examples for Current and Voltage Transformers
Connection Examples
449