Siemens 7SC80 Manual page 235

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Displacement-voltage element of the (sensitive) ground fault detection
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Directional time overcurrent protection (phase and ground function)
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Undervoltage protection
The voltage monitoring function works with the fundamental components of current and voltage. The nega-
tive, positive, and zero sequence voltages are derived from the line voltages; a suitable voltage transformer
connection type needs to be selected.
[anschl-spg-wdl-3phl1e-131106, 1, en_US]
Figure 2-72
SIPROTEC Compact, 7SC80, Manual
E50417-G1140-C486-A8, Edition 07.2017
Wiring for 3-phase voltage transformer connection: VAN, VBN, VCN
Functions
2.12 Monitoring Functions
235