Siemens SIPROTEC 7UT613 series Manual page 533

Figure A-24 Connection example 7UT613 for a three-phase power transformer with current transformers between star-
point and earthing point, additional connection for high-impedance protection; I
sensitivity input
7UT613/63x Manual
C53000-G1176-C160-2
A.3 Connection Examples
connected to the high-
Z3
533