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5.1
Voltage Transformer Configurations
Relay Voltage
Configuration Setting
Van, Vbn, Vcn
Vab, Vbc, 3Vo
Va, Vb, Vc
©2013 Siemens Protection Devices Limited
Description
27/59, 47, 59N, 78,
81, 81R
Phase – Neutral
Phase – Phase
Calculated
NPS
ZPS
27/59, 47, 59N, 78,
81, 81R
Phase – Neutral
Phase – Phase
Calculated
NPS
ZPS
27/59, 47, 78, 81,
81R
Phase – Neutral
Phase – Phase
Calculated
NPS
No ZPS available
Chapter 5) 7SR158 Installation Guide
Connection
Va
Vb
Vc
A
B
C
B17
B19
B21
B23
B25
B27
Chapter 5 Page 13 of 14
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