Siemens SIPROTEC 4 7UT6 Series Manual page 511

[7ut613-sptrafo-3eckw-erd-mitstrwsternpkt-030324-rei, 1, en_GB]
Figure C-7
SIPROTEC 4, 7UT6x, Manual
C53000-G1176-C230-5, Edition 09.2016
Connection example 7UT613 for an auto-transformer bank with protected object auto-trans-
former branchpoints, with individually accessible earthing electrodes equipped with CTs (M3).
The CTs on the earthing side constitute a separate side for current comparison for each trans-
former of the bank. The starpoint of the CTs at M3 is routed via an auxiliary input (Ι
allows realisation of restricted earth fault protection and/or earth overcurrent protection.
Connection Examples
C.1 Current Transformer Connection Examples
1), which
X1
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