ABB RELION 620 Series Technical Manual page 11

620 series ANSI
Technical Manual
Settings............................................................................................136
Monitored data.................................................................................138
Section 4 Protection functions...........................................................139
Current protection................................................................................. 139
Three-phase non-directional overcurrent protection 51P/50P......... 139
Identification............................................................................... 139
Function block............................................................................ 139
Functionality............................................................................... 139
Operation principle..................................................................... 140
Measurement modes..................................................................143
Timer characteristics.................................................................. 143
Application.................................................................................. 145
Signals........................................................................................152
Settings.......................................................................................153
Monitored data............................................................................156
Technical data............................................................................ 157
Three-phase non-directional long time overcurrent protection 51LT158
Identification............................................................................... 158
Function block............................................................................ 158
Functionality............................................................................... 158
Operation principle..................................................................... 158
Timer characteristics ................................................................. 160
Application.................................................................................. 161
Signals........................................................................................161
Settings.......................................................................................162
Monitored data............................................................................163
Three-phase directional overcurrent protection 67/51P and 67/50P164
Identification............................................................................... 164
Function block............................................................................ 164
Functionality............................................................................... 164
Operation principle .................................................................... 164
Measurement modes..................................................................170
Directional overcurrent characteristics ...................................... 170
Application.................................................................................. 178
Signals........................................................................................181
Settings.......................................................................................182
Monitored data............................................................................186
Technical data............................................................................ 187
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