Siemens SIPROTEC 4 User Manual page 585

[7sj621-3spgswdl-sternp-v-schalt-20070413, 1, en_US]
Figure C-9
Note If the system only has 2 voltage transformers (open-delta connection), connect also the device in
opendelta connection and short-circuit the unused voltage input.
[7sj621-3spgwdl-kabelumbauw-e-n-wickl-20070413, 1, en_US]
Figure C-10
SIPROTEC 4, 7SJ62/64, Manual
C53000-G1140-C207-8, Edition 08.2016
Voltage transformer connections for two voltage transformers in open delta voltage connec-
tion. In this connection, determination of zero-sequence voltage V0 is not possible. Functions
using zero sequence voltage must be disabled.
Voltage transformer connection only to open delta VT
C.2 Connection Examples for Voltage Transformers 7SJ621, 7SJ622
Connection Examples
585