Siemens SIPROTEC 7SJ80

Connection Examples for Current and Voltage Transformers
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Figure C-1 Current transformer connections to three current transformers and neutral rpoint current
(ground current) (Holmgreen connection) – appropriate for all networks
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Figure C-2 Current transformer connections to two current transformers – only for isolated or resonant-
grounded networks
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Figure C-3 Current transformer connections to three current transformers, ground current from addi-
tional summation current transformer – preferably for effectively or low-resistance grounded
networks
C.1
Connection Examples
C.1 Connection Examples for Current and Voltage Transformers
442 SIPROTEC 4, 7SJ80, Manual
E50417-G1140-C343-A8, Edition 12.2017