Siemens SIPROTEC 7SJ80

2.7 Negative Sequence Protection 46....................................................................................132
2.7.1 Definite Time characteristic .......................................................................................132
2.7.2 Inverse Time characteristic.........................................................................................132
2.7.3 Setting Notes.............................................................................................................135
2.7.4 Settings.....................................................................................................................136
2.7.5 Information List.........................................................................................................137
2.8 Frequency Protection 81 O/U...........................................................................................138
2.8.1 Functional Description...............................................................................................138
2.8.2 Setting Notes.............................................................................................................139
2.8.3 Settings.....................................................................................................................140
2.8.4 Information List.........................................................................................................141
2.9 Undervoltage-controlled reactive power protection (27/Q)...............................................142
2.9.1 Functional Description...............................................................................................142
2.9.2 Setting Notes.............................................................................................................144
2.9.3 Settings.....................................................................................................................145
2.9.4 Information List.........................................................................................................146
2.10 Thermal Overload Protection 49...................................................................................... 147
2.10.1 Functional Description...............................................................................................147
2.10.2 Setting Notes.............................................................................................................149
2.10.3 Settings.....................................................................................................................152
2.10.4 Information List.........................................................................................................152
2.11 Monitoring Functions......................................................................................................154
2.11.1 Measurement Supervision......................................................................................... 154
2.11.1.1 General................................................................................................................154
2.11.1.2 Hardware Monitoring .......................................................................................... 154
2.11.1.3 Software Monitoring ........................................................................................... 156
2.11.1.4 Monitoring of the Transformer Circuits................................................................. 157
2.11.1.5 Measurement Voltage Failure Detection............................................................... 158
2.11.1.6 Broken Wire Monitoring of Voltage Transformer Circuits....................................... 162
2.11.1.7 Setting Notes....................................................................................................... 163
2.11.1.8 Settings............................................................................................................... 164
2.11.1.9 Information List................................................................................................... 165
2.11.2 Trip Circuit Supervision 74TC..................................................................................... 166
2.11.2.1 Functional Description......................................................................................... 166
2.11.2.2 Setting Notes....................................................................................................... 169
2.11.2.3 Settings............................................................................................................... 169
2.11.2.4 Information List................................................................................................... 170
2.11.3 Malfunction Responses of the Monitoring Functions.................................................. 170
2.11.3.1 Description.......................................................................................................... 170
2.12 Ground Fault Protection 64, 67N(s), 50N(s), 51N(s).........................................................172
2.12.1 Ground Fault Detection for cos-ϕ / sin-ϕ Measurement (Standard Method)..................172
2.12.2 Ground Fault Detection for V0/I0-ϕ Measurement.......................................................178
2.12.3 Extended Ground Fault Protection EPTR/TNP.............................................................. 182
2.12.3.1 General Information.............................................................................................182
2.12.3.2 Ground-Fault Protection EPTR - B.......................................................................... 183
2.12.3.3 Transformer Neutral-Point Protection TNP.............................................................184
2.12.4 Ground Fault Location............................................................................................... 184
2.12.5 Setting Notes.............................................................................................................185
2.12.6 Settings.....................................................................................................................193
2.12.7 Settings EPTR, TNP.....................................................................................................195
Table of Contents
SIPROTEC 4, 7SJ80, Manual 13
E50417-G1140-C343-A8, Edition 12.2017