Section 1MAC309294-MB F
4 RER620
Technical Manual
Single-phase directional overcurrent protection 67/51P-1 and
67/51P-2.......................................................................................... 100
Identification ............................................................................... 100
Function block ............................................................................ 100
Functionality ............................................................................... 100
Operation principle ..................................................................... 101
Measuring modes....................................................................... 106
Directional overcurrent characteristics ....................................... 106
Application.................................................................................. 114
Signals ....................................................................................... 116
Settings ...................................................................................... 117
Monitored data ........................................................................... 122
Technical data............................................................................ 124
Non-directional neutral overcurrent protection 51N/50N ................. 124
Identification ............................................................................... 124
Function block ............................................................................ 125
Functionality ............................................................................... 125
Operation principle ..................................................................... 125
Measurement modes ................................................................. 127
Timer characteristics .................................................................. 127
Application.................................................................................. 130
Signals ....................................................................................... 131
Settings ...................................................................................... 133
Monitored data ........................................................................... 136
Technical data............................................................................ 137
Directional earth-fault protection 67/51N and 67/50N ..................... 137
Identification ............................................................................... 137
Function block ............................................................................ 138
Functionality ............................................................................... 138
Operation principle ..................................................................... 138
Directional ground-fault principles.............................................. 142
Measurement modes ................................................................. 148
Timer characteristics .................................................................. 149
Directional ground-fault characteristics ...................................... 151
Application.................................................................................. 161
Signals ....................................................................................... 163
Settings ...................................................................................... 164
Monitored data ........................................................................... 169
Technical data............................................................................ 170
Sensitive earth-fault protection 50SEF............................................ 170
Identification ............................................................................... 170
Function block ............................................................................ 171
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