7SR21 & 7SR22 - Installation Guide
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7.8 Voltage Transformer Configurations
Relay Voltage
Description Connection
Van, Vbn, Vcn 67 & 67N & 67G
47, 27/59 & 81
Phase – Neutral
Phase – Phase
Calculated
NPS
ZPS
Va, Vb, Vc 67
67N (NPS polarising)
47, 27/59 & 81
Phase – Phase
Calculated
NPS
Vab, Vbc, 3V0 67 & 67N & 67G
47, 59N, 27/59 & 81
Phase – Neutral
Calculated
Phase – Phase
Phase Vca Calculated
NPS
ZPS
Figure 7.8-1 7SR22 VT Connections
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