Siemens SIPROTEC 7SJ80

[anschl-2-stromwdl-v-schaltung-060606, 1, en_US]
Figure C-8
Current transformer connections to two current transformers and as open-delta connection
the voltage transformer – for isolated or resonant-grounded networks when no directional
ground protection is needed
[anschl-3-stromwdl-sternp-v-schaltung-060606, 1, en_US]
Figure C-9
Current transformer connections to three current transformers, two voltage transformers in
open-deltaconnection, only for isolated or resonant-grounded networks; no directional ground
protection since displacement voltage cannot be calculated
Note: If the system has only 2 voltage transformers (open-delta connection), the device, too, should be
connected in open-delta connection and the unused voltage input should be short-circuited.
Connection Examples
C.1 Connection Examples for Current and Voltage Transformers
446 SIPROTEC 4, 7SJ80, Manual
E50417-G1140-C343-A8, Edition 12.2017