Siemens SIPROTEC 4 Manual page 203

Voltage and frequency protection
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[anschl-uph-usyn-20070129, 1, en_US]
Figure C-3
The connection can be established at any one of the three phases. The phase must be the same for Vph-n and
Vsyn.
[anschl-u12-u23-ux-20070129, 1, en_US]
Figure C-4
SIPROTEC 4, 7RW80, Manual
C53000-G1140-C233-4, Edition 07.2018
Example for connection type "Vph-n, Vsyn"
Example for connection type "VAB, VBC, Vx"
Connection Examples
C.1 Connection Examples for Voltage Transformers
203

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