ABB RED650 - Page 9

Line differential protection logic LDLPSCH ......................... 106
Technical data........................................................................... 109
Section 7 Impedance protection...................................................111
Distance protection ZMFPDIS........................................................ 111
Identification.............................................................................. 111
Functionality.............................................................................. 111
Function block........................................................................... 112
Signals.......................................................................................113
Settings......................................................................................115
Monitored data...........................................................................116
Operation principle.................................................................... 117
Filtering.................................................................................118
Distance measuring zones................................................... 118
Phase-selection element...................................................... 119
Directional criteria.................................................................120
Fuse failure...........................................................................121
Power swings....................................................................... 121
Measuring principles............................................................ 121
Load encroachment..............................................................132
Simplified logic schemes...................................................... 133
Measurement....................................................................... 140
Technical data........................................................................... 145
Power swing detection ZMRPSB ...................................................146
Identification.............................................................................. 146
Functionality.............................................................................. 146
Function block........................................................................... 146
Signals.......................................................................................146
Settings......................................................................................147
Operation principle.................................................................... 148
Resistive reach in forward direction..................................... 149
Resistive reach in reverse direction..................................... 150
Reactive reach in forward and reverse direction.................. 151
Basic detection logic.............................................................151
Operating and inhibit conditions........................................... 153
Technical data........................................................................... 154
Automatic switch onto fault logic ZCVPSOF ................................. 154
Identification.............................................................................. 154
Functionality.............................................................................. 155
Function block........................................................................... 155
Signals.......................................................................................155
Settings......................................................................................156
Monitored data...........................................................................156
Operation principle.................................................................... 157
Table of contents
Line differential protection RED650 2.2 IEC 3
Technical manual