ABB REL650 series Technical Manual page 9

Technical manual
Measuring principles...................................................................120
CVT filter.....................................................................................122
Simplified logic diagrams............................................................122
Zone tripping logic...................................................................... 123
Technical data................................................................................. 125
Phase selection with load encroachment, quadrilateral
characteristic FDPSPDIS (21).............................................................. 126
Identification.................................................................................... 126
Functionality.................................................................................... 127
Function block................................................................................. 127
Signals.............................................................................................128
Settings............................................................................................129
Operation principle.......................................................................... 130
Phase-to-ground fault................................................................. 132
Phase-to-phase fault.................................................................. 134
Three-phase faults......................................................................135
Load encroachment....................................................................136
Minimum operate currents..........................................................141
Simplified logic diagrams............................................................142
Technical data................................................................................. 147
Faulty phase identification with load enchroachment for mho
FMPSPDIS (21).................................................................................... 147
Identification.................................................................................... 147
Functionality.................................................................................... 147
Function block................................................................................. 148
Signals.............................................................................................148
Settings............................................................................................149
Operation principle.......................................................................... 149
The phase selection function......................................................149
Technical data................................................................................. 160
Additional distance protection directional function for ground faults
ZDARDIR (21D)....................................................................................160
Identification.................................................................................... 160
Functionality.................................................................................... 161
Function block................................................................................. 161
Signals.............................................................................................161
Settings............................................................................................162
Operation principle.......................................................................... 162
Technical data................................................................................. 165
Directional impedance quadrilateral and mho ZDNRDIR (21D)........... 165
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